2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read/Write Portable Network Graphics Image Format %
17 % Glenn Randers-Pehrson %
21 % Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization %
22 % dedicated to making software imaging solutions freely available. %
24 % You may not use this file except in compliance with the License. You may %
25 % obtain a copy of the License at %
27 % http://www.imagemagick.org/script/license.php %
29 % Unless required by applicable law or agreed to in writing, software %
30 % distributed under the License is distributed on an "AS IS" BASIS, %
31 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
32 % See the License for the specific language governing permissions and %
33 % limitations under the License. %
35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
44 #include "magick/studio.h"
45 #include "magick/artifact.h"
46 #include "magick/attribute.h"
47 #include "magick/blob.h"
48 #include "magick/blob-private.h"
49 #include "magick/cache.h"
50 #include "magick/color.h"
51 #include "magick/color-private.h"
52 #include "magick/colormap.h"
53 #include "magick/colorspace.h"
54 #include "magick/constitute.h"
55 #include "magick/enhance.h"
56 #include "magick/exception.h"
57 #include "magick/exception-private.h"
58 #include "magick/geometry.h"
59 #include "magick/histogram.h"
60 #include "magick/image.h"
61 #include "magick/image-private.h"
62 #include "magick/layer.h"
63 #include "magick/list.h"
64 #include "magick/log.h"
65 #include "magick/magick.h"
66 #include "magick/memory_.h"
67 #include "magick/module.h"
68 #include "magick/monitor.h"
69 #include "magick/monitor-private.h"
70 #include "magick/option.h"
71 #include "magick/quantum-private.h"
72 #include "magick/profile.h"
73 #include "magick/property.h"
74 #include "magick/resource_.h"
75 #include "magick/semaphore.h"
76 #include "magick/quantum-private.h"
77 #include "magick/static.h"
78 #include "magick/statistic.h"
79 #include "magick/string_.h"
80 #include "magick/string-private.h"
81 #include "magick/transform.h"
82 #include "magick/utility.h"
83 #if defined(MAGICKCORE_PNG_DELEGATE)
85 /* Suppress libpng pedantic warnings that were added in
86 * libpng-1.2.41 and libpng-1.4.0. If you are working on
87 * migration to libpng-1.5, remove these defines and then
88 * fix any code that generates warnings.
90 /* #define PNG_DEPRECATED Use of this function is deprecated */
91 /* #define PNG_USE_RESULT The result of this function must be checked */
92 /* #define PNG_NORETURN This function does not return */
93 /* #define PNG_ALLOCATED The result of the function is new memory */
94 /* #define PNG_DEPSTRUCT Access to this struct member is deprecated */
99 /* ImageMagick differences */
100 #define first_scene scene
102 #if PNG_LIBPNG_VER > 10011
104 Optional declarations. Define or undefine them as you like.
106 /* #define PNG_DEBUG -- turning this on breaks VisualC compiling */
109 Features under construction. Define these to work on them.
111 #undef MNG_OBJECT_BUFFERS
112 #undef MNG_BASI_SUPPORTED
113 #define MNG_COALESCE_LAYERS /* In 5.4.4, this interfered with MMAP'ed files. */
114 #define MNG_INSERT_LAYERS /* Troublesome, but seem to work as of 5.4.4 */
115 #if defined(MAGICKCORE_JPEG_DELEGATE)
116 # define JNG_SUPPORTED /* Not finished as of 5.5.2. See "To do" comments. */
118 #if !defined(RGBColorMatchExact)
119 #define IsPNGColorEqual(color,target) \
120 (((color).red == (target).red) && \
121 ((color).green == (target).green) && \
122 ((color).blue == (target).blue))
126 Establish thread safety.
127 setjmp/longjmp is claimed to be safe on these platforms:
128 setjmp/longjmp is alleged to be unsafe on these platforms:
130 #ifndef SETJMP_IS_THREAD_SAFE
131 #define PNG_SETJMP_NOT_THREAD_SAFE
134 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
136 *ping_semaphore = (SemaphoreInfo *) NULL;
140 This temporary until I set up malloc'ed object attributes array.
141 Recompile with MNG_MAX_OBJECTS=65536L to avoid this limit but
144 #define MNG_MAX_OBJECTS 256
147 If this not defined, spec is interpreted strictly. If it is
148 defined, an attempt will be made to recover from some errors,
150 o global PLTE too short
155 Don't try to define PNG_MNG_FEATURES_SUPPORTED here. Make sure
156 it's defined in libpng/pngconf.h, version 1.0.9 or later. It won't work
157 with earlier versions of libpng. From libpng-1.0.3a to libpng-1.0.8,
158 PNG_READ|WRITE_EMPTY_PLTE were used but those have been deprecated in
159 libpng in favor of PNG_MNG_FEATURES_SUPPORTED, so we set them here.
160 PNG_MNG_FEATURES_SUPPORTED is disabled by default in libpng-1.0.9 and
161 will be enabled by default in libpng-1.2.0.
163 #ifdef PNG_MNG_FEATURES_SUPPORTED
164 # ifndef PNG_READ_EMPTY_PLTE_SUPPORTED
165 # define PNG_READ_EMPTY_PLTE_SUPPORTED
167 # ifndef PNG_WRITE_EMPTY_PLTE_SUPPORTED
168 # define PNG_WRITE_EMPTY_PLTE_SUPPORTED
173 Maximum valid size_t in PNG/MNG chunks is (2^31)-1
174 This macro is only defined in libpng-1.0.3 and later.
175 Previously it was PNG_MAX_UINT but that was deprecated in libpng-1.2.6
177 #ifndef PNG_UINT_31_MAX
178 #define PNG_UINT_31_MAX (png_uint_32) 0x7fffffffL
182 Constant strings for known chunk types. If you need to add a chunk,
183 add a string holding the name here. To make the code more
184 portable, we use ASCII numbers like this, not characters.
187 static png_byte FARDATA mng_MHDR[5]={ 77, 72, 68, 82, (png_byte) '\0'};
188 static png_byte FARDATA mng_BACK[5]={ 66, 65, 67, 75, (png_byte) '\0'};
189 static png_byte FARDATA mng_BASI[5]={ 66, 65, 83, 73, (png_byte) '\0'};
190 static png_byte FARDATA mng_CLIP[5]={ 67, 76, 73, 80, (png_byte) '\0'};
191 static png_byte FARDATA mng_CLON[5]={ 67, 76, 79, 78, (png_byte) '\0'};
192 static png_byte FARDATA mng_DEFI[5]={ 68, 69, 70, 73, (png_byte) '\0'};
193 static png_byte FARDATA mng_DHDR[5]={ 68, 72, 68, 82, (png_byte) '\0'};
194 static png_byte FARDATA mng_DISC[5]={ 68, 73, 83, 67, (png_byte) '\0'};
195 static png_byte FARDATA mng_ENDL[5]={ 69, 78, 68, 76, (png_byte) '\0'};
196 static png_byte FARDATA mng_FRAM[5]={ 70, 82, 65, 77, (png_byte) '\0'};
197 static png_byte FARDATA mng_IEND[5]={ 73, 69, 78, 68, (png_byte) '\0'};
198 static png_byte FARDATA mng_IHDR[5]={ 73, 72, 68, 82, (png_byte) '\0'};
199 static png_byte FARDATA mng_JHDR[5]={ 74, 72, 68, 82, (png_byte) '\0'};
200 static png_byte FARDATA mng_LOOP[5]={ 76, 79, 79, 80, (png_byte) '\0'};
201 static png_byte FARDATA mng_MAGN[5]={ 77, 65, 71, 78, (png_byte) '\0'};
202 static png_byte FARDATA mng_MEND[5]={ 77, 69, 78, 68, (png_byte) '\0'};
203 static png_byte FARDATA mng_MOVE[5]={ 77, 79, 86, 69, (png_byte) '\0'};
204 static png_byte FARDATA mng_PAST[5]={ 80, 65, 83, 84, (png_byte) '\0'};
205 static png_byte FARDATA mng_PLTE[5]={ 80, 76, 84, 69, (png_byte) '\0'};
206 static png_byte FARDATA mng_SAVE[5]={ 83, 65, 86, 69, (png_byte) '\0'};
207 static png_byte FARDATA mng_SEEK[5]={ 83, 69, 69, 75, (png_byte) '\0'};
208 static png_byte FARDATA mng_SHOW[5]={ 83, 72, 79, 87, (png_byte) '\0'};
209 static png_byte FARDATA mng_TERM[5]={ 84, 69, 82, 77, (png_byte) '\0'};
210 static png_byte FARDATA mng_bKGD[5]={ 98, 75, 71, 68, (png_byte) '\0'};
211 static png_byte FARDATA mng_cHRM[5]={ 99, 72, 82, 77, (png_byte) '\0'};
212 static png_byte FARDATA mng_gAMA[5]={103, 65, 77, 65, (png_byte) '\0'};
213 static png_byte FARDATA mng_iCCP[5]={105, 67, 67, 80, (png_byte) '\0'};
214 static png_byte FARDATA mng_nEED[5]={110, 69, 69, 68, (png_byte) '\0'};
215 static png_byte FARDATA mng_pHYg[5]={112, 72, 89, 103, (png_byte) '\0'};
216 static png_byte FARDATA mng_vpAg[5]={118, 112, 65, 103, (png_byte) '\0'};
217 static png_byte FARDATA mng_pHYs[5]={112, 72, 89, 115, (png_byte) '\0'};
218 static png_byte FARDATA mng_sBIT[5]={115, 66, 73, 84, (png_byte) '\0'};
219 static png_byte FARDATA mng_sRGB[5]={115, 82, 71, 66, (png_byte) '\0'};
220 static png_byte FARDATA mng_tRNS[5]={116, 82, 78, 83, (png_byte) '\0'};
222 #if defined(JNG_SUPPORTED)
223 static png_byte FARDATA mng_IDAT[5]={ 73, 68, 65, 84, (png_byte) '\0'};
224 static png_byte FARDATA mng_JDAT[5]={ 74, 68, 65, 84, (png_byte) '\0'};
225 static png_byte FARDATA mng_JDAA[5]={ 74, 68, 65, 65, (png_byte) '\0'};
226 static png_byte FARDATA mng_JdAA[5]={ 74, 100, 65, 65, (png_byte) '\0'};
227 static png_byte FARDATA mng_JSEP[5]={ 74, 83, 69, 80, (png_byte) '\0'};
228 static png_byte FARDATA mng_oFFs[5]={111, 70, 70, 115, (png_byte) '\0'};
232 Other known chunks that are not yet supported by ImageMagick:
233 static png_byte FARDATA mng_hIST[5]={104, 73, 83, 84, (png_byte) '\0'};
234 static png_byte FARDATA mng_iCCP[5]={105, 67, 67, 80, (png_byte) '\0'};
235 static png_byte FARDATA mng_iTXt[5]={105, 84, 88, 116, (png_byte) '\0'};
236 static png_byte FARDATA mng_sPLT[5]={115, 80, 76, 84, (png_byte) '\0'};
237 static png_byte FARDATA mng_sTER[5]={115, 84, 69, 82, (png_byte) '\0'};
238 static png_byte FARDATA mng_tEXt[5]={116, 69, 88, 116, (png_byte) '\0'};
239 static png_byte FARDATA mng_tIME[5]={116, 73, 77, 69, (png_byte) '\0'};
240 static png_byte FARDATA mng_zTXt[5]={122, 84, 88, 116, (png_byte) '\0'};
243 typedef struct _MngBox
252 typedef struct _MngPair
259 #ifdef MNG_OBJECT_BUFFERS
260 typedef struct _MngBuffer
292 typedef struct _MngInfo
295 #ifdef MNG_OBJECT_BUFFERS
297 *ob[MNG_MAX_OBJECTS];
308 #ifndef PNG_READ_EMPTY_PLTE_SUPPORTED
309 bytes_in_read_buffer,
315 #if defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) || \
316 defined(PNG_MNG_FEATURES_SUPPORTED)
328 have_saved_bkgd_index,
329 have_write_global_chrm,
330 have_write_global_gama,
331 have_write_global_plte,
332 have_write_global_srgb,
346 x_off[MNG_MAX_OBJECTS],
347 y_off[MNG_MAX_OBJECTS];
353 object_clip[MNG_MAX_OBJECTS];
356 /* These flags could be combined into one byte */
357 exists[MNG_MAX_OBJECTS],
358 frozen[MNG_MAX_OBJECTS],
360 invisible[MNG_MAX_OBJECTS],
361 viewable[MNG_MAX_OBJECTS];
373 #ifndef PNG_READ_EMPTY_PLTE_SUPPORTED
391 global_x_pixels_per_unit,
392 global_y_pixels_per_unit,
402 global_phys_unit_type,
421 #ifdef MNG_BASI_SUPPORTED
429 basi_compression_method,
431 basi_interlace_method,
454 /* Added at version 6.6.6-7 */
461 /* ping_exclude_iTXt, */
468 ping_exclude_zCCP, /* hex-encoded iCCP */
475 Forward declarations.
477 static MagickBooleanType
478 WritePNGImage(const ImageInfo *,Image *);
480 static MagickBooleanType
481 WriteMNGImage(const ImageInfo *,Image *);
483 #if defined(JNG_SUPPORTED)
484 static MagickBooleanType
485 WriteJNGImage(const ImageInfo *,Image *);
488 #if PNG_LIBPNG_VER > 10011
491 #if (MAGICKCORE_QUANTUM_DEPTH >= 16)
492 static MagickBooleanType
493 LosslessReduceDepthOK(Image *image)
496 ok_to_reduce=MagickFalse;
498 /* Reduce bit depth if it can be reduced losslessly from 16 to 8.
499 * Note that the method GetImageDepth doesn't check background
500 * and doesn't handle PseudoClass specially. Also it uses
501 * multiplication and division by 257 instead of shifting, so
505 if (image->depth == 16)
512 (((((size_t) image->background_color.red >> 8) & 0xff)
513 == ((size_t) image->background_color.red & 0xff)) &&
514 ((((size_t) image->background_color.green >> 8) & 0xff)
515 == ((size_t) image->background_color.green & 0xff)) &&
516 ((((size_t) image->background_color.blue >> 8) & 0xff)
517 == ((size_t) image->background_color.blue & 0xff))) ? MagickTrue :
520 if (ok_to_reduce != MagickFalse && image->storage_class == PseudoClass)
524 for (indx=0; indx < (ssize_t) image->colors; indx++)
526 ok_to_reduce=(((((size_t) image->colormap[indx].red >>
528 == ((size_t) image->colormap[indx].red & 0xff)) &&
529 ((((size_t) image->colormap[indx].green >> 8) & 0xff)
530 == ((size_t) image->colormap[indx].green & 0xff)) &&
531 ((((size_t) image->colormap[indx].blue >> 8) & 0xff)
532 == ((size_t) image->colormap[indx].blue & 0xff)) &&
533 (image->matte == MagickFalse ||
534 (((size_t) image->colormap[indx].opacity >> 8) & 0xff)
535 == ((size_t) image->colormap[indx].opacity & 0xff))) ?
536 MagickTrue : MagickFalse;
537 if (ok_to_reduce == MagickFalse)
542 if ((ok_to_reduce != MagickFalse) &&
543 (image->storage_class != PseudoClass))
551 for (y=0; y < (ssize_t) image->rows; y++)
553 p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
555 if (p == (const PixelPacket *) NULL)
557 ok_to_reduce = MagickFalse;
561 for (x=(ssize_t) image->columns-1; x >= 0; x--)
564 (((size_t) p->red >> 8) & 0xff) ==
565 ((size_t) p->red & 0xff)) &&
566 ((((size_t) p->green >> 8) & 0xff) ==
567 ((size_t) p->green & 0xff)) &&
568 ((((size_t) p->blue >> 8) & 0xff) ==
569 ((size_t) p->blue & 0xff)) &&
570 (((image->matte == MagickFalse ||
571 (((size_t) p->opacity >> 8) & 0xff) ==
572 ((size_t) p->opacity & 0xff))))) ? MagickTrue : MagickFalse;
574 if (ok_to_reduce == MagickFalse)
584 if (ok_to_reduce != MagickFalse)
586 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
587 " OK to reduce PNG bit depth to 8 without loss of info");
591 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
592 " Not OK to reduce PNG bit depth to 8 without loss of info");
598 #endif /* MAGICKCORE_QUANTUM_DEPTH >= 16 */
601 Magick_RenderingIntent_to_PNG_RenderingIntent(const RenderingIntent intent)
605 case PerceptualIntent:
611 case SaturationIntent:
622 static RenderingIntent
623 Magick_RenderingIntent_from_PNG_RenderingIntent(const int ping_intent)
628 return PerceptualIntent;
631 return RelativeIntent;
634 return SaturationIntent;
637 return AbsoluteIntent;
640 return UndefinedIntent;
644 static inline ssize_t MagickMax(const ssize_t x,const ssize_t y)
652 static inline ssize_t MagickMin(const ssize_t x,const ssize_t y)
662 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
666 % I m a g e I s G r a y %
670 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
672 % Like IsGrayImage except does not change DirectClass to PseudoClass %
674 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
676 static MagickBooleanType ImageIsGray(Image *image)
678 register const PixelPacket
686 assert(image != (Image *) NULL);
687 assert(image->signature == MagickSignature);
688 if (image->debug != MagickFalse)
689 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
691 if (image->storage_class == PseudoClass)
693 for (i=0; i < (ssize_t) image->colors; i++)
694 if (IsGray(image->colormap+i) == MagickFalse)
698 for (y=0; y < (ssize_t) image->rows; y++)
700 p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
701 if (p == (const PixelPacket *) NULL)
703 for (x=(ssize_t) image->columns-1; x >= 0; x--)
705 if (IsGray(p) == MagickFalse)
712 #endif /* PNG_LIBPNG_VER > 10011 */
713 #endif /* MAGICKCORE_PNG_DELEGATE */
716 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
724 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
726 % IsMNG() returns MagickTrue if the image format type, identified by the
727 % magick string, is MNG.
729 % The format of the IsMNG method is:
731 % MagickBooleanType IsMNG(const unsigned char *magick,const size_t length)
733 % A description of each parameter follows:
735 % o magick: compare image format pattern against these bytes.
737 % o length: Specifies the length of the magick string.
741 static MagickBooleanType IsMNG(const unsigned char *magick,const size_t length)
746 if (memcmp(magick,"\212MNG\r\n\032\n",8) == 0)
753 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
761 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
763 % IsJNG() returns MagickTrue if the image format type, identified by the
764 % magick string, is JNG.
766 % The format of the IsJNG method is:
768 % MagickBooleanType IsJNG(const unsigned char *magick,const size_t length)
770 % A description of each parameter follows:
772 % o magick: compare image format pattern against these bytes.
774 % o length: Specifies the length of the magick string.
778 static MagickBooleanType IsJNG(const unsigned char *magick,const size_t length)
783 if (memcmp(magick,"\213JNG\r\n\032\n",8) == 0)
790 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
798 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
800 % IsPNG() returns MagickTrue if the image format type, identified by the
801 % magick string, is PNG.
803 % The format of the IsPNG method is:
805 % MagickBooleanType IsPNG(const unsigned char *magick,const size_t length)
807 % A description of each parameter follows:
809 % o magick: compare image format pattern against these bytes.
811 % o length: Specifies the length of the magick string.
814 static MagickBooleanType IsPNG(const unsigned char *magick,const size_t length)
819 if (memcmp(magick,"\211PNG\r\n\032\n",8) == 0)
825 #if defined(MAGICKCORE_PNG_DELEGATE)
826 #if defined(__cplusplus) || defined(c_plusplus)
830 #if (PNG_LIBPNG_VER > 10011)
831 static size_t WriteBlobMSBULong(Image *image,const size_t value)
836 assert(image != (Image *) NULL);
837 assert(image->signature == MagickSignature);
838 buffer[0]=(unsigned char) (value >> 24);
839 buffer[1]=(unsigned char) (value >> 16);
840 buffer[2]=(unsigned char) (value >> 8);
841 buffer[3]=(unsigned char) value;
842 return((size_t) WriteBlob(image,4,buffer));
845 static void PNGLong(png_bytep p,png_uint_32 value)
847 *p++=(png_byte) ((value >> 24) & 0xff);
848 *p++=(png_byte) ((value >> 16) & 0xff);
849 *p++=(png_byte) ((value >> 8) & 0xff);
850 *p++=(png_byte) (value & 0xff);
853 #if defined(JNG_SUPPORTED)
854 static void PNGsLong(png_bytep p,png_int_32 value)
856 *p++=(png_byte) ((value >> 24) & 0xff);
857 *p++=(png_byte) ((value >> 16) & 0xff);
858 *p++=(png_byte) ((value >> 8) & 0xff);
859 *p++=(png_byte) (value & 0xff);
863 static void PNGShort(png_bytep p,png_uint_16 value)
865 *p++=(png_byte) ((value >> 8) & 0xff);
866 *p++=(png_byte) (value & 0xff);
869 static void PNGType(png_bytep p,png_bytep type)
871 (void) CopyMagickMemory(p,type,4*sizeof(png_byte));
874 static void LogPNGChunk(MagickBooleanType logging, png_bytep type,
877 if (logging != MagickFalse)
878 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
879 " Writing %c%c%c%c chunk, length: %.20g",
880 type[0],type[1],type[2],type[3],(double) length);
882 #endif /* PNG_LIBPNG_VER > 10011 */
884 #if defined(__cplusplus) || defined(c_plusplus)
888 #if PNG_LIBPNG_VER > 10011
890 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
894 % R e a d P N G I m a g e %
898 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
900 % ReadPNGImage() reads a Portable Network Graphics (PNG) or
901 % Multiple-image Network Graphics (MNG) image file and returns it. It
902 % allocates the memory necessary for the new Image structure and returns a
903 % pointer to the new image or set of images.
905 % MNG support written by Glenn Randers-Pehrson, glennrp@image...
907 % The format of the ReadPNGImage method is:
909 % Image *ReadPNGImage(const ImageInfo *image_info,ExceptionInfo *exception)
911 % A description of each parameter follows:
913 % o image_info: the image info.
915 % o exception: return any errors or warnings in this structure.
917 % To do, more or less in chronological order (as of version 5.5.2,
918 % November 26, 2002 -- glennrp -- see also "To do" under WriteMNGImage):
920 % Get 16-bit cheap transparency working.
922 % (At this point, PNG decoding is supposed to be in full MNG-LC compliance)
924 % Preserve all unknown and not-yet-handled known chunks found in input
925 % PNG file and copy them into output PNG files according to the PNG
928 % (At this point, PNG encoding should be in full MNG compliance)
930 % Provide options for choice of background to use when the MNG BACK
931 % chunk is not present or is not mandatory (i.e., leave transparent,
932 % user specified, MNG BACK, PNG bKGD)
934 % Implement LOOP/ENDL [done, but could do discretionary loops more
935 % efficiently by linking in the duplicate frames.].
937 % Decode and act on the MHDR simplicity profile (offer option to reject
938 % files or attempt to process them anyway when the profile isn't LC or VLC).
940 % Upgrade to full MNG without Delta-PNG.
942 % o BACK [done a while ago except for background image ID]
943 % o MOVE [done 15 May 1999]
944 % o CLIP [done 15 May 1999]
945 % o DISC [done 19 May 1999]
946 % o SAVE [partially done 19 May 1999 (marks objects frozen)]
947 % o SEEK [partially done 19 May 1999 (discard function only)]
951 % o MNG-level tEXt/iTXt/zTXt
956 % o iTXt (wait for libpng implementation).
958 % Use the scene signature to discover when an identical scene is
959 % being reused, and just point to the original image->exception instead
960 % of storing another set of pixels. This not specific to MNG
961 % but could be applied generally.
963 % Upgrade to full MNG with Delta-PNG.
967 % We will not attempt to read files containing the CgBI chunk.
968 % They are really Xcode files meant for display on the iPhone.
969 % These are not valid PNG files and it is impossible to recover
970 % the orginal PNG from files that have been converted to Xcode-PNG,
971 % since irretrievable loss of color data has occurred due to the
972 % use of premultiplied alpha.
975 #if defined(__cplusplus) || defined(c_plusplus)
980 This the function that does the actual reading of data. It is
981 the same as the one supplied in libpng, except that it receives the
982 datastream from the ReadBlob() function instead of standard input.
984 static void png_get_data(png_structp png_ptr,png_bytep data,png_size_t length)
989 image=(Image *) png_get_io_ptr(png_ptr);
995 check=(png_size_t) ReadBlob(image,(size_t) length,data);
1001 (void) FormatMagickString(msg,MaxTextExtent,
1002 "Expected %.20g bytes; found %.20g bytes",(double) length,
1004 png_warning(png_ptr,msg);
1005 png_error(png_ptr,"Read Exception");
1010 #if !defined(PNG_READ_EMPTY_PLTE_SUPPORTED) && \
1011 !defined(PNG_MNG_FEATURES_SUPPORTED)
1012 /* We use mng_get_data() instead of png_get_data() if we have a libpng
1013 * older than libpng-1.0.3a, which was the first to allow the empty
1014 * PLTE, or a newer libpng in which PNG_MNG_FEATURES_SUPPORTED was
1015 * ifdef'ed out. Earlier versions would crash if the bKGD chunk was
1016 * encountered after an empty PLTE, so we have to look ahead for bKGD
1017 * chunks and remove them from the datastream that is passed to libpng,
1018 * and store their contents for later use.
1020 static void mng_get_data(png_structp png_ptr,png_bytep data,png_size_t length)
1035 mng_info=(MngInfo *) png_get_io_ptr(png_ptr);
1036 image=(Image *) mng_info->image;
1037 while (mng_info->bytes_in_read_buffer && length)
1039 data[i]=mng_info->read_buffer[i];
1040 mng_info->bytes_in_read_buffer--;
1046 check=(png_size_t) ReadBlob(image,(size_t) length,(char *) data);
1048 if (check != length)
1049 png_error(png_ptr,"Read Exception");
1053 if ((data[0] == 0) && (data[1] == 0) && (data[2] == 0) &&
1056 check=(png_size_t) ReadBlob(image,(size_t) length,
1057 (char *) mng_info->read_buffer);
1058 mng_info->read_buffer[4]=0;
1059 mng_info->bytes_in_read_buffer=4;
1060 if (memcmp(mng_info->read_buffer,mng_PLTE,4) == 0)
1061 mng_info->found_empty_plte=MagickTrue;
1062 if (memcmp(mng_info->read_buffer,mng_IEND,4) == 0)
1064 mng_info->found_empty_plte=MagickFalse;
1065 mng_info->have_saved_bkgd_index=MagickFalse;
1069 if ((data[0] == 0) && (data[1] == 0) && (data[2] == 0) &&
1072 check=(png_size_t) ReadBlob(image,(size_t) length,
1073 (char *) mng_info->read_buffer);
1074 mng_info->read_buffer[4]=0;
1075 mng_info->bytes_in_read_buffer=4;
1076 if (memcmp(mng_info->read_buffer,mng_bKGD,4) == 0)
1077 if (mng_info->found_empty_plte)
1080 Skip the bKGD data byte and CRC.
1083 ReadBlob(image,5,(char *) mng_info->read_buffer);
1084 check=(png_size_t) ReadBlob(image,(size_t) length,
1085 (char *) mng_info->read_buffer);
1086 mng_info->saved_bkgd_index=mng_info->read_buffer[0];
1087 mng_info->have_saved_bkgd_index=MagickTrue;
1088 mng_info->bytes_in_read_buffer=0;
1096 static void png_put_data(png_structp png_ptr,png_bytep data,png_size_t length)
1101 image=(Image *) png_get_io_ptr(png_ptr);
1107 check=(png_size_t) WriteBlob(image,(size_t) length,data);
1109 if (check != length)
1110 png_error(png_ptr,"WriteBlob Failed");
1114 static void png_flush_data(png_structp png_ptr)
1119 #ifdef PNG_WRITE_EMPTY_PLTE_SUPPORTED
1120 static int PalettesAreEqual(Image *a,Image *b)
1125 if ((a == (Image *) NULL) || (b == (Image *) NULL))
1126 return((int) MagickFalse);
1128 if (a->storage_class != PseudoClass || b->storage_class != PseudoClass)
1129 return((int) MagickFalse);
1131 if (a->colors != b->colors)
1132 return((int) MagickFalse);
1134 for (i=0; i < (ssize_t) a->colors; i++)
1136 if ((a->colormap[i].red != b->colormap[i].red) ||
1137 (a->colormap[i].green != b->colormap[i].green) ||
1138 (a->colormap[i].blue != b->colormap[i].blue))
1139 return((int) MagickFalse);
1142 return((int) MagickTrue);
1146 static void MngInfoDiscardObject(MngInfo *mng_info,int i)
1148 if (i && (i < MNG_MAX_OBJECTS) && (mng_info != (MngInfo *) NULL) &&
1149 mng_info->exists[i] && !mng_info->frozen[i])
1151 #ifdef MNG_OBJECT_BUFFERS
1152 if (mng_info->ob[i] != (MngBuffer *) NULL)
1154 if (mng_info->ob[i]->reference_count > 0)
1155 mng_info->ob[i]->reference_count--;
1157 if (mng_info->ob[i]->reference_count == 0)
1159 if (mng_info->ob[i]->image != (Image *) NULL)
1160 mng_info->ob[i]->image=DestroyImage(mng_info->ob[i]->image);
1162 mng_info->ob[i]=DestroyString(mng_info->ob[i]);
1165 mng_info->ob[i]=(MngBuffer *) NULL;
1167 mng_info->exists[i]=MagickFalse;
1168 mng_info->invisible[i]=MagickFalse;
1169 mng_info->viewable[i]=MagickFalse;
1170 mng_info->frozen[i]=MagickFalse;
1171 mng_info->x_off[i]=0;
1172 mng_info->y_off[i]=0;
1173 mng_info->object_clip[i].left=0;
1174 mng_info->object_clip[i].right=(ssize_t) PNG_UINT_31_MAX;
1175 mng_info->object_clip[i].top=0;
1176 mng_info->object_clip[i].bottom=(ssize_t) PNG_UINT_31_MAX;
1180 static void MngInfoFreeStruct(MngInfo *mng_info,
1181 MagickBooleanType *have_mng_structure)
1183 if (*have_mng_structure != MagickFalse && (mng_info != (MngInfo *) NULL))
1188 for (i=1; i < MNG_MAX_OBJECTS; i++)
1189 MngInfoDiscardObject(mng_info,i);
1191 if (mng_info->global_plte != (png_colorp) NULL)
1192 mng_info->global_plte=(png_colorp)
1193 RelinquishMagickMemory(mng_info->global_plte);
1195 mng_info=(MngInfo *) RelinquishMagickMemory(mng_info);
1196 *have_mng_structure=MagickFalse;
1200 static MngBox mng_minimum_box(MngBox box1,MngBox box2)
1206 if (box.left < box2.left)
1209 if (box.top < box2.top)
1212 if (box.right > box2.right)
1213 box.right=box2.right;
1215 if (box.bottom > box2.bottom)
1216 box.bottom=box2.bottom;
1221 static MngBox mng_read_box(MngBox previous_box,char delta_type,unsigned char *p)
1227 Read clipping boundaries from DEFI, CLIP, FRAM, or PAST chunk.
1229 box.left=(ssize_t) ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
1230 box.right=(ssize_t) ((p[4] << 24) | (p[5] << 16) | (p[6] << 8) | p[7]);
1231 box.top=(ssize_t) ((p[8] << 24) | (p[9] << 16) | (p[10] << 8) | p[11]);
1232 box.bottom=(ssize_t) ((p[12] << 24) | (p[13] << 16) | (p[14] << 8) | p[15]);
1233 if (delta_type != 0)
1235 box.left+=previous_box.left;
1236 box.right+=previous_box.right;
1237 box.top+=previous_box.top;
1238 box.bottom+=previous_box.bottom;
1244 static MngPair mng_read_pair(MngPair previous_pair,int delta_type,
1250 Read two ssize_ts from CLON, MOVE or PAST chunk
1252 pair.a=(long) ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
1253 pair.b=(long) ((p[4] << 24) | (p[5] << 16) | (p[6] << 8) | p[7]);
1255 if (delta_type != 0)
1257 pair.a+=previous_pair.a;
1258 pair.b+=previous_pair.b;
1264 static long mng_get_long(unsigned char *p)
1266 return((long) ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]));
1269 static void MagickPNGErrorHandler(png_struct *ping,png_const_charp message)
1274 image=(Image *) png_get_error_ptr(ping);
1276 if (image->debug != MagickFalse)
1277 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1278 " libpng-%s error: %s", PNG_LIBPNG_VER_STRING,message);
1280 (void) ThrowMagickException(&image->exception,GetMagickModule(),CoderError,
1281 message,"`%s'",image->filename);
1283 #if (PNG_LIBPNG_VER < 10500)
1284 /* A warning about deprecated use of jmpbuf here is unavoidable if you
1285 * are building with libpng-1.4.x and can be ignored.
1287 longjmp(ping->jmpbuf,1);
1289 png_longjmp(ping,1);
1293 static void MagickPNGWarningHandler(png_struct *ping,png_const_charp message)
1298 if (LocaleCompare(message, "Missing PLTE before tRNS") == 0)
1299 png_error(ping, message);
1301 image=(Image *) png_get_error_ptr(ping);
1302 if (image->debug != MagickFalse)
1303 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1304 " libpng-%s warning: %s", PNG_LIBPNG_VER_STRING,message);
1306 (void) ThrowMagickException(&image->exception,GetMagickModule(),CoderWarning,
1307 message,"`%s'",image->filename);
1310 #ifdef PNG_USER_MEM_SUPPORTED
1311 static png_voidp Magick_png_malloc(png_structp png_ptr,png_uint_32 size)
1313 #if (PNG_LIBPNG_VER < 10011)
1318 ret=((png_voidp) AcquireMagickMemory((size_t) size));
1321 png_error("Insufficient memory.");
1326 return((png_voidp) AcquireMagickMemory((size_t) size));
1331 Free a pointer. It is removed from the list at the same time.
1333 static png_free_ptr Magick_png_free(png_structp png_ptr,png_voidp ptr)
1336 ptr=RelinquishMagickMemory(ptr);
1337 return((png_free_ptr) NULL);
1341 #if defined(__cplusplus) || defined(c_plusplus)
1346 Magick_png_read_raw_profile(Image *image, const ImageInfo *image_info,
1347 png_textp text,int ii)
1352 register unsigned char
1366 unhex[103]={0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,
1367 0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,
1368 0,0,0,0,0,0,0,0,0,1, 2,3,4,5,6,7,8,9,0,0,
1369 0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,
1370 0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,10,11,12,
1374 /* look for newline */
1378 /* look for length */
1379 while (*sp == '\0' || *sp == ' ' || *sp == '\n')
1382 length=(png_uint_32) StringToLong(sp);
1384 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1385 " length: %lu",(unsigned long) length);
1387 while (*sp != ' ' && *sp != '\n')
1390 /* allocate space */
1393 (void) ThrowMagickException(&image->exception,GetMagickModule(),
1394 CoderWarning,"UnableToCopyProfile","`%s'","invalid profile length");
1395 return(MagickFalse);
1398 profile=AcquireStringInfo(length);
1400 if (profile == (StringInfo *) NULL)
1402 (void) ThrowMagickException(&image->exception,GetMagickModule(),
1403 ResourceLimitError,"MemoryAllocationFailed","`%s'",
1404 "unable to copy profile");
1405 return(MagickFalse);
1408 /* copy profile, skipping white space and column 1 "=" signs */
1409 dp=GetStringInfoDatum(profile);
1412 for (i=0; i < (ssize_t) nibbles; i++)
1414 while (*sp < '0' || (*sp > '9' && *sp < 'a') || *sp > 'f')
1418 (void) ThrowMagickException(&image->exception,GetMagickModule(),
1419 CoderWarning,"UnableToCopyProfile","`%s'","ran out of data");
1420 profile=DestroyStringInfo(profile);
1421 return(MagickFalse);
1427 *dp=(unsigned char) (16*unhex[(int) *sp++]);
1430 (*dp++)+=unhex[(int) *sp++];
1433 We have already read "Raw profile type.
1435 (void) SetImageProfile(image,&text[ii].key[17],profile);
1436 profile=DestroyStringInfo(profile);
1438 if (image_info->verbose)
1439 (void) printf(" Found a generic profile, type %s\n",&text[ii].key[17]);
1444 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1445 static int read_vpag_chunk_callback(png_struct *ping, png_unknown_chunkp chunk)
1451 /* The unknown chunk structure contains the chunk data:
1456 Note that libpng has already taken care of the CRC handling.
1460 if (chunk->name[0] != 118 || chunk->name[1] != 112 ||
1461 chunk->name[2] != 65 ||chunk-> name[3] != 103)
1462 return(0); /* Did not recognize */
1464 /* recognized vpAg */
1466 if (chunk->size != 9)
1467 return(-1); /* Error return */
1469 if (chunk->data[8] != 0)
1470 return(0); /* ImageMagick requires pixel units */
1472 image=(Image *) png_get_user_chunk_ptr(ping);
1474 image->page.width=(size_t) ((chunk->data[0] << 24) |
1475 (chunk->data[1] << 16) | (chunk->data[2] << 8) | chunk->data[3]);
1477 image->page.height=(size_t) ((chunk->data[4] << 24) |
1478 (chunk->data[5] << 16) | (chunk->data[6] << 8) | chunk->data[7]);
1480 /* Return one of the following: */
1481 /* return(-n); chunk had an error */
1482 /* return(0); did not recognize */
1483 /* return(n); success */
1491 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1495 % R e a d O n e P N G I m a g e %
1499 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1501 % ReadOnePNGImage() reads a Portable Network Graphics (PNG) image file
1502 % (minus the 8-byte signature) and returns it. It allocates the memory
1503 % necessary for the new Image structure and returns a pointer to the new
1506 % The format of the ReadOnePNGImage method is:
1508 % Image *ReadOnePNGImage(MngInfo *mng_info, const ImageInfo *image_info,
1509 % ExceptionInfo *exception)
1511 % A description of each parameter follows:
1513 % o mng_info: Specifies a pointer to a MngInfo structure.
1515 % o image_info: the image info.
1517 % o exception: return any errors or warnings in this structure.
1520 static Image *ReadOnePNGImage(MngInfo *mng_info,
1521 const ImageInfo *image_info, ExceptionInfo *exception)
1523 /* Read one PNG image */
1534 ping_interlace_method,
1535 ping_compression_method,
1577 register unsigned char
1580 register IndexPacket
1587 register PixelPacket
1594 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1595 png_byte unused_chunks[]=
1597 104, 73, 83, 84, (png_byte) '\0', /* hIST */
1598 105, 84, 88, 116, (png_byte) '\0', /* iTXt */
1599 112, 67, 65, 76, (png_byte) '\0', /* pCAL */
1600 115, 67, 65, 76, (png_byte) '\0', /* sCAL */
1601 115, 80, 76, 84, (png_byte) '\0', /* sPLT */
1602 116, 73, 77, 69, (png_byte) '\0', /* tIME */
1606 logging=LogMagickEvent(CoderEvent,GetMagickModule(),
1607 " Enter ReadOnePNGImage()");
1609 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
1610 LockSemaphoreInfo(ping_semaphore);
1613 #if (PNG_LIBPNG_VER < 10200)
1614 if (image_info->verbose)
1615 printf("Your PNG library (libpng-%s) is rather old.\n",
1616 PNG_LIBPNG_VER_STRING);
1619 #if (PNG_LIBPNG_VER >= 10400)
1620 # ifndef PNG_TRANSFORM_GRAY_TO_RGB /* Added at libpng-1.4.0beta67 */
1621 if (image_info->verbose)
1623 printf("Your PNG library (libpng-%s) is an old beta version.\n",
1624 PNG_LIBPNG_VER_STRING);
1625 printf("Please update it.\n");
1631 quantum_info = (QuantumInfo *) NULL;
1632 image=mng_info->image;
1634 if (logging != MagickFalse)
1635 (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1636 " image->matte=%d",(int) image->matte);
1638 /* Set to an out-of-range color unless tRNS chunk is present */
1639 transparent_color.red=65537;
1640 transparent_color.green=65537;
1641 transparent_color.blue=65537;
1642 transparent_color.opacity=65537;
1645 Allocate the PNG structures
1647 #ifdef PNG_USER_MEM_SUPPORTED
1648 ping=png_create_read_struct_2(PNG_LIBPNG_VER_STRING, image,
1649 MagickPNGErrorHandler,MagickPNGWarningHandler, NULL,
1650 (png_malloc_ptr) Magick_png_malloc,(png_free_ptr) Magick_png_free);
1652 ping=png_create_read_struct(PNG_LIBPNG_VER_STRING,image,
1653 MagickPNGErrorHandler,MagickPNGWarningHandler);
1655 if (ping == (png_struct *) NULL)
1656 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1658 ping_info=png_create_info_struct(ping);
1660 if (ping_info == (png_info *) NULL)
1662 png_destroy_read_struct(&ping,(png_info **) NULL,(png_info **) NULL);
1663 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1666 end_info=png_create_info_struct(ping);
1668 if (end_info == (png_info *) NULL)
1670 png_destroy_read_struct(&ping,&ping_info,(png_info **) NULL);
1671 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1674 ping_pixels=(unsigned char *) NULL;
1676 if (setjmp(png_jmpbuf(ping)))
1679 PNG image is corrupt.
1681 png_destroy_read_struct(&ping,&ping_info,&end_info);
1682 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
1683 UnlockSemaphoreInfo(ping_semaphore);
1685 if (logging != MagickFalse)
1686 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1687 " exit ReadOnePNGImage() with error.");
1689 if (image != (Image *) NULL)
1691 InheritException(exception,&image->exception);
1695 return(GetFirstImageInList(image));
1698 Prepare PNG for reading.
1701 mng_info->image_found++;
1702 png_set_sig_bytes(ping,8);
1704 if (LocaleCompare(image_info->magick,"MNG") == 0)
1706 #if defined(PNG_MNG_FEATURES_SUPPORTED)
1707 (void) png_permit_mng_features(ping,PNG_ALL_MNG_FEATURES);
1708 png_set_read_fn(ping,image,png_get_data);
1710 #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED)
1711 png_permit_empty_plte(ping,MagickTrue);
1712 png_set_read_fn(ping,image,png_get_data);
1714 mng_info->image=image;
1715 mng_info->bytes_in_read_buffer=0;
1716 mng_info->found_empty_plte=MagickFalse;
1717 mng_info->have_saved_bkgd_index=MagickFalse;
1718 png_set_read_fn(ping,mng_info,mng_get_data);
1724 png_set_read_fn(ping,image,png_get_data);
1726 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
1727 /* Ignore unused chunks and all unknown chunks except for vpAg */
1728 png_set_keep_unknown_chunks(ping, 1, NULL, 0);
1729 png_set_keep_unknown_chunks(ping, 2, mng_vpAg, 1);
1730 png_set_keep_unknown_chunks(ping, 1, unused_chunks,
1731 (int)sizeof(unused_chunks)/5);
1732 /* Callback for other unknown chunks */
1733 png_set_read_user_chunk_fn(ping, image, read_vpag_chunk_callback);
1736 #if (PNG_LIBPNG_VER < 10400)
1737 # if defined(PNG_USE_PNGGCCRD) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) && \
1738 (PNG_LIBPNG_VER >= 10200) && (PNG_LIBPNG_VER < 10220) && defined(__i386__)
1739 /* Disable thread-unsafe features of pnggccrd */
1740 if (png_access_version_number() >= 10200)
1742 png_uint_32 mmx_disable_mask=0;
1743 png_uint_32 asm_flags;
1745 mmx_disable_mask |= ( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW \
1746 | PNG_ASM_FLAG_MMX_READ_FILTER_SUB \
1747 | PNG_ASM_FLAG_MMX_READ_FILTER_AVG \
1748 | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH );
1749 asm_flags=png_get_asm_flags(ping);
1750 png_set_asm_flags(ping, asm_flags & ~mmx_disable_mask);
1755 png_read_info(ping,ping_info);
1757 png_get_IHDR(ping,ping_info,&ping_width,&ping_height,
1758 &ping_bit_depth,&ping_color_type,
1759 &ping_interlace_method,&ping_compression_method,
1760 &ping_filter_method);
1762 (void) png_get_tRNS(ping, ping_info, &ping_trans_alpha, &ping_num_trans,
1765 (void) png_get_bKGD(ping, ping_info, &ping_background);
1767 if (ping_bit_depth < 8)
1769 if (((int) ping_color_type == PNG_COLOR_TYPE_PALETTE))
1771 png_set_packing(ping);
1776 image->depth=ping_bit_depth;
1777 image->depth=GetImageQuantumDepth(image,MagickFalse);
1778 image->interlace=ping_interlace_method != 0 ? PNGInterlace : NoInterlace;
1779 if (logging != MagickFalse)
1781 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1782 " PNG width: %.20g, height: %.20g",
1783 (double) ping_width, (double) ping_height);
1785 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1786 " PNG color_type: %d, bit_depth: %d",
1787 ping_color_type, ping_bit_depth);
1789 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1790 " PNG compression_method: %d",
1791 ping_compression_method);
1793 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1794 " PNG interlace_method: %d, filter_method: %d",
1795 ping_interlace_method,ping_filter_method);
1798 #ifdef PNG_READ_iCCP_SUPPORTED
1799 if (png_get_valid(ping,ping_info,PNG_INFO_iCCP))
1804 #if (PNG_LIBPNG_VER < 10500)
1818 (void) png_get_iCCP(ping,ping_info,&name,(int *) &compression,&info,
1821 if (profile_length != 0)
1826 if (logging != MagickFalse)
1827 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1828 " Reading PNG iCCP chunk.");
1829 profile=AcquireStringInfo(profile_length);
1830 SetStringInfoDatum(profile,(const unsigned char *) info);
1831 (void) SetImageProfile(image,"icc",profile);
1832 profile=DestroyStringInfo(profile);
1836 #if defined(PNG_READ_sRGB_SUPPORTED)
1841 if (mng_info->have_global_srgb)
1842 image->rendering_intent=Magick_RenderingIntent_from_PNG_RenderingIntent
1843 (mng_info->global_srgb_intent);
1845 if (png_get_sRGB(ping,ping_info,&intent))
1847 image->rendering_intent=Magick_RenderingIntent_from_PNG_RenderingIntent
1850 if (logging != MagickFalse)
1851 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1852 " Reading PNG sRGB chunk: rendering_intent: %d",intent);
1860 if (!png_get_gAMA(ping,ping_info,&file_gamma))
1861 if (mng_info->have_global_gama)
1862 png_set_gAMA(ping,ping_info,mng_info->global_gamma);
1864 if (png_get_gAMA(ping,ping_info,&file_gamma))
1866 image->gamma=(float) file_gamma;
1867 if (logging != MagickFalse)
1868 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1869 " Reading PNG gAMA chunk: gamma: %f",file_gamma);
1872 if (!png_get_valid(ping,ping_info,PNG_INFO_cHRM))
1874 if (mng_info->have_global_chrm != MagickFalse)
1876 (void) png_set_cHRM(ping,ping_info,
1877 mng_info->global_chrm.white_point.x,
1878 mng_info->global_chrm.white_point.y,
1879 mng_info->global_chrm.red_primary.x,
1880 mng_info->global_chrm.red_primary.y,
1881 mng_info->global_chrm.green_primary.x,
1882 mng_info->global_chrm.green_primary.y,
1883 mng_info->global_chrm.blue_primary.x,
1884 mng_info->global_chrm.blue_primary.y);
1888 if (png_get_valid(ping,ping_info,PNG_INFO_cHRM))
1890 (void) png_get_cHRM(ping,ping_info,
1891 &image->chromaticity.white_point.x,
1892 &image->chromaticity.white_point.y,
1893 &image->chromaticity.red_primary.x,
1894 &image->chromaticity.red_primary.y,
1895 &image->chromaticity.green_primary.x,
1896 &image->chromaticity.green_primary.y,
1897 &image->chromaticity.blue_primary.x,
1898 &image->chromaticity.blue_primary.y);
1900 if (logging != MagickFalse)
1901 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1902 " Reading PNG cHRM chunk.");
1905 if (image->rendering_intent != UndefinedIntent)
1907 png_set_sRGB(ping,ping_info,
1908 Magick_RenderingIntent_to_PNG_RenderingIntent
1909 (image->rendering_intent));
1910 png_set_gAMA(ping,ping_info,0.45455f);
1911 png_set_cHRM(ping,ping_info,
1912 0.6400f, 0.3300f, 0.3000f, 0.6000f,
1913 0.1500f, 0.0600f, 0.3127f, 0.3290f);
1915 #if defined(PNG_oFFs_SUPPORTED)
1916 if (png_get_valid(ping,ping_info,PNG_INFO_oFFs))
1918 image->page.x=(ssize_t) png_get_x_offset_pixels(ping, ping_info);
1919 image->page.y=(ssize_t) png_get_y_offset_pixels(ping, ping_info);
1921 if (logging != MagickFalse)
1922 if (image->page.x || image->page.y)
1923 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1924 " Reading PNG oFFs chunk: x: %.20g, y: %.20g.",(double)
1925 image->page.x,(double) image->page.y);
1928 #if defined(PNG_pHYs_SUPPORTED)
1929 if (!png_get_valid(ping,ping_info,PNG_INFO_pHYs))
1931 if (mng_info->have_global_phys)
1933 png_set_pHYs(ping,ping_info,
1934 mng_info->global_x_pixels_per_unit,
1935 mng_info->global_y_pixels_per_unit,
1936 mng_info->global_phys_unit_type);
1940 if (png_get_valid(ping,ping_info,PNG_INFO_pHYs))
1950 Set image resolution.
1952 (void) png_get_pHYs(ping,ping_info,&x_resolution,&y_resolution,
1954 image->x_resolution=(double) x_resolution;
1955 image->y_resolution=(double) y_resolution;
1957 if (unit_type == PNG_RESOLUTION_METER)
1959 image->units=PixelsPerCentimeterResolution;
1960 image->x_resolution=(double) x_resolution/100.0;
1961 image->y_resolution=(double) y_resolution/100.0;
1964 if (logging != MagickFalse)
1965 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1966 " Reading PNG pHYs chunk: xres: %.20g, yres: %.20g, units: %d.",
1967 (double) x_resolution,(double) y_resolution,unit_type);
1971 if (png_get_valid(ping,ping_info,PNG_INFO_PLTE))
1979 (void) png_get_PLTE(ping,ping_info,&palette,&number_colors);
1981 if ((number_colors == 0) &&
1982 ((int) ping_color_type == PNG_COLOR_TYPE_PALETTE))
1984 if (mng_info->global_plte_length)
1986 png_set_PLTE(ping,ping_info,mng_info->global_plte,
1987 (int) mng_info->global_plte_length);
1989 if (!png_get_valid(ping,ping_info,PNG_INFO_tRNS))
1990 if (mng_info->global_trns_length)
1992 if (mng_info->global_trns_length >
1993 mng_info->global_plte_length)
1994 (void) ThrowMagickException(&image->exception,
1995 GetMagickModule(),CoderError,
1996 "global tRNS has more entries than global PLTE",
1997 "`%s'",image_info->filename);
1998 png_set_tRNS(ping,ping_info,mng_info->global_trns,
1999 (int) mng_info->global_trns_length,NULL);
2001 #if defined(PNG_READ_bKGD_SUPPORTED)
2003 #ifndef PNG_READ_EMPTY_PLTE_SUPPORTED
2004 mng_info->have_saved_bkgd_index ||
2006 png_get_valid(ping,ping_info,PNG_INFO_bKGD))
2011 #ifndef PNG_READ_EMPTY_PLTE_SUPPORTED
2012 if (mng_info->have_saved_bkgd_index)
2013 background.index=mng_info->saved_bkgd_index;
2015 if (png_get_valid(ping, ping_info, PNG_INFO_bKGD))
2016 background.index=ping_background->index;
2018 background.red=(png_uint_16)
2019 mng_info->global_plte[background.index].red;
2021 background.green=(png_uint_16)
2022 mng_info->global_plte[background.index].green;
2024 background.blue=(png_uint_16)
2025 mng_info->global_plte[background.index].blue;
2027 png_set_bKGD(ping,ping_info,&background);
2032 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2033 CoderError,"No global PLTE in file","`%s'",
2034 image_info->filename);
2038 #if defined(PNG_READ_bKGD_SUPPORTED)
2039 if (mng_info->have_global_bkgd &&
2040 (!png_get_valid(ping,ping_info,PNG_INFO_bKGD)))
2041 image->background_color=mng_info->mng_global_bkgd;
2043 if (png_get_valid(ping,ping_info,PNG_INFO_bKGD))
2046 Set image background color.
2048 if (logging != MagickFalse)
2049 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2050 " Reading PNG bKGD chunk.");
2052 if (ping_bit_depth == MAGICKCORE_QUANTUM_DEPTH)
2054 image->background_color.red=ping_background->red;
2055 image->background_color.green=ping_background->green;
2056 image->background_color.blue=ping_background->blue;
2059 else /* Scale background components to 16-bit */
2064 if (logging != MagickFalse)
2065 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2066 " raw ping_background=(%d,%d,%d).",ping_background->red,
2067 ping_background->green,ping_background->blue);
2071 if (ping_bit_depth == 1)
2074 else if (ping_bit_depth == 2)
2077 else if (ping_bit_depth == 4)
2080 if (ping_bit_depth <= 8)
2083 ping_background->red *= bkgd_scale;
2084 ping_background->green *= bkgd_scale;
2085 ping_background->blue *= bkgd_scale;
2087 if (logging != MagickFalse)
2089 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2090 " bkgd_scale=%d.",bkgd_scale);
2092 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2093 " ping_background=(%d,%d,%d).",ping_background->red,
2094 ping_background->green,ping_background->blue);
2097 image->background_color.red=
2098 ScaleShortToQuantum(ping_background->red);
2100 image->background_color.green=
2101 ScaleShortToQuantum(ping_background->green);
2103 image->background_color.blue=
2104 ScaleShortToQuantum(ping_background->blue);
2106 image->background_color.opacity=OpaqueOpacity;
2108 if (logging != MagickFalse)
2109 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2110 " image->background_color=(%.20g,%.20g,%.20g).",
2111 (double) image->background_color.red,
2112 (double) image->background_color.green,
2113 (double) image->background_color.blue);
2118 if (png_get_valid(ping,ping_info,PNG_INFO_tRNS))
2121 Image has a tRNS chunk.
2129 if (logging != MagickFalse)
2130 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2131 " Reading PNG tRNS chunk.");
2133 max_sample = (int) ((one << ping_bit_depth) - 1);
2135 if ((ping_color_type == PNG_COLOR_TYPE_GRAY &&
2136 (int)ping_trans_color->gray > max_sample) ||
2137 (ping_color_type == PNG_COLOR_TYPE_RGB &&
2138 ((int)ping_trans_color->red > max_sample ||
2139 (int)ping_trans_color->green > max_sample ||
2140 (int)ping_trans_color->blue > max_sample)))
2142 if (logging != MagickFalse)
2143 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2144 " Ignoring PNG tRNS chunk with out-of-range sample.");
2145 png_free_data(ping, ping_info, PNG_FREE_TRNS, 0);
2146 png_set_invalid(ping,ping_info,PNG_INFO_tRNS);
2147 image->matte=MagickFalse;
2154 scale_to_short = 65535L/((1UL << ping_bit_depth)-1);
2156 /* Scale transparent_color to short */
2157 transparent_color.red= scale_to_short*ping_trans_color->red;
2158 transparent_color.green= scale_to_short*ping_trans_color->green;
2159 transparent_color.blue= scale_to_short*ping_trans_color->blue;
2160 transparent_color.opacity= scale_to_short*ping_trans_color->gray;
2162 if (ping_color_type == PNG_COLOR_TYPE_GRAY)
2164 if (logging != MagickFalse)
2166 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2167 " Raw tRNS graylevel is %d.",ping_trans_color->gray);
2169 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2170 " scaled graylevel is %d.",transparent_color.opacity);
2172 transparent_color.red=transparent_color.opacity;
2173 transparent_color.green=transparent_color.opacity;
2174 transparent_color.blue=transparent_color.opacity;
2178 #if defined(PNG_READ_sBIT_SUPPORTED)
2179 if (mng_info->have_global_sbit)
2181 if (!png_get_valid(ping,ping_info,PNG_INFO_sBIT))
2182 png_set_sBIT(ping,ping_info,&mng_info->global_sbit);
2185 num_passes=png_set_interlace_handling(ping);
2187 png_read_update_info(ping,ping_info);
2189 ping_rowbytes=png_get_rowbytes(ping,ping_info);
2192 Initialize image structure.
2194 mng_info->image_box.left=0;
2195 mng_info->image_box.right=(ssize_t) ping_width;
2196 mng_info->image_box.top=0;
2197 mng_info->image_box.bottom=(ssize_t) ping_height;
2198 if (mng_info->mng_type == 0)
2200 mng_info->mng_width=ping_width;
2201 mng_info->mng_height=ping_height;
2202 mng_info->frame=mng_info->image_box;
2203 mng_info->clip=mng_info->image_box;
2208 image->page.y=mng_info->y_off[mng_info->object_id];
2211 image->compression=ZipCompression;
2212 image->columns=ping_width;
2213 image->rows=ping_height;
2214 if (((int) ping_color_type == PNG_COLOR_TYPE_PALETTE) ||
2215 ((int) ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA) ||
2216 ((int) ping_color_type == PNG_COLOR_TYPE_GRAY))
2221 image->storage_class=PseudoClass;
2223 image->colors=one << ping_bit_depth;
2224 #if (MAGICKCORE_QUANTUM_DEPTH == 8)
2225 if (image->colors > 256)
2228 if (image->colors > 65536L)
2229 image->colors=65536L;
2231 if ((int) ping_color_type == PNG_COLOR_TYPE_PALETTE)
2239 (void) png_get_PLTE(ping,ping_info,&palette,&number_colors);
2240 image->colors=(size_t) number_colors;
2242 if (logging != MagickFalse)
2243 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2244 " Reading PNG PLTE chunk: number_colors: %d.",number_colors);
2248 if (image->storage_class == PseudoClass)
2251 Initialize image colormap.
2253 if (AcquireImageColormap(image,image->colors) == MagickFalse)
2254 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
2256 if ((int) ping_color_type == PNG_COLOR_TYPE_PALETTE)
2264 (void) png_get_PLTE(ping,ping_info,&palette,&number_colors);
2266 for (i=0; i < (ssize_t) image->colors; i++)
2268 image->colormap[i].red=ScaleCharToQuantum(palette[i].red);
2269 image->colormap[i].green=ScaleCharToQuantum(palette[i].green);
2270 image->colormap[i].blue=ScaleCharToQuantum(palette[i].blue);
2279 scale=(QuantumRange/((1UL << ping_bit_depth)-1));
2284 for (i=0; i < (ssize_t) image->colors; i++)
2286 image->colormap[i].red=(Quantum) (i*scale);
2287 image->colormap[i].green=(Quantum) (i*scale);
2288 image->colormap[i].blue=(Quantum) (i*scale);
2293 Read image scanlines.
2295 if (image->delay != 0)
2296 mng_info->scenes_found++;
2298 if ((mng_info->mng_type == 0 && (image->ping != MagickFalse)) || (
2299 (image_info->number_scenes != 0) && (mng_info->scenes_found > (ssize_t)
2300 (image_info->first_scene+image_info->number_scenes))))
2302 if (logging != MagickFalse)
2303 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2304 " Skipping PNG image data for scene %.20g",(double)
2305 mng_info->scenes_found-1);
2306 png_destroy_read_struct(&ping,&ping_info,&end_info);
2307 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
2308 UnlockSemaphoreInfo(ping_semaphore);
2310 if (logging != MagickFalse)
2311 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2312 " exit ReadOnePNGImage().");
2317 if (logging != MagickFalse)
2318 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2319 " Reading PNG IDAT chunk(s)");
2322 ping_pixels=(unsigned char *) AcquireQuantumMemory(image->rows,
2323 ping_rowbytes*sizeof(*ping_pixels));
2326 ping_pixels=(unsigned char *) AcquireQuantumMemory(ping_rowbytes,
2327 sizeof(*ping_pixels));
2329 if (ping_pixels == (unsigned char *) NULL)
2330 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
2332 if (logging != MagickFalse)
2333 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2334 " Converting PNG pixels to pixel packets");
2336 Convert PNG pixels to pixel packets.
2338 if (setjmp(png_jmpbuf(ping)))
2341 PNG image is corrupt.
2343 png_destroy_read_struct(&ping,&ping_info,&end_info);
2344 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
2345 UnlockSemaphoreInfo(ping_semaphore);
2347 if (quantum_info != (QuantumInfo *) NULL)
2348 quantum_info = DestroyQuantumInfo(quantum_info);
2350 if (ping_pixels != (unsigned char *) NULL)
2351 ping_pixels=(unsigned char *) RelinquishMagickMemory(ping_pixels);
2353 if (logging != MagickFalse)
2354 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2355 " exit ReadOnePNGImage() with error.");
2357 if (image != (Image *) NULL)
2359 InheritException(exception,&image->exception);
2363 return(GetFirstImageInList(image));
2366 quantum_info=AcquireQuantumInfo(image_info,image);
2368 if (quantum_info == (QuantumInfo *) NULL)
2369 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
2374 found_transparent_pixel;
2376 found_transparent_pixel=MagickFalse;
2378 if (image->storage_class == DirectClass)
2380 for (pass=0; pass < num_passes; pass++)
2383 Convert image to DirectClass pixel packets.
2385 #if (MAGICKCORE_QUANTUM_DEPTH == 8)
2389 depth=(ssize_t) ping_bit_depth;
2391 image->matte=(((int) ping_color_type == PNG_COLOR_TYPE_RGB_ALPHA) ||
2392 ((int) ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA) ||
2393 (png_get_valid(ping,ping_info,PNG_INFO_tRNS))) ?
2394 MagickTrue : MagickFalse;
2396 for (y=0; y < (ssize_t) image->rows; y++)
2399 row_offset=ping_rowbytes*y;
2404 png_read_row(ping,ping_pixels+row_offset,NULL);
2405 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
2407 if (q == (PixelPacket *) NULL)
2410 #if (0 && (MAGICKCORE_QUANTUM_DEPTH == 8) && !defined(MAGICKCORE_HDRI_SUPPORT))
2411 /* code deleted from version 6.6.6-8 */
2412 #else /* (MAGICKCORE_QUANTUM_DEPTH != 8) */
2414 if ((int) ping_color_type == PNG_COLOR_TYPE_GRAY)
2415 (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
2416 GrayQuantum,ping_pixels+row_offset,exception);
2418 else if ((int) ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
2419 (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
2420 GrayAlphaQuantum,ping_pixels+row_offset,exception);
2422 else if ((int) ping_color_type == PNG_COLOR_TYPE_RGB_ALPHA)
2423 (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
2424 RGBAQuantum,ping_pixels+row_offset,exception);
2426 else if ((int) ping_color_type == PNG_COLOR_TYPE_PALETTE)
2427 (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
2428 IndexQuantum,ping_pixels+row_offset,exception);
2430 else /* ping_color_type == PNG_COLOR_TYPE_RGB */
2431 (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
2432 RGBQuantum,ping_pixels+row_offset,exception);
2434 if (found_transparent_pixel == MagickFalse)
2436 /* Is there a transparent pixel in the row? */
2437 if (y== 0 && logging != MagickFalse)
2438 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2439 " Looking for cheap transparent pixel");
2441 for (x=(ssize_t) image->columns-1; x >= 0; x--)
2443 if ((ping_color_type == PNG_COLOR_TYPE_RGBA ||
2444 ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA) &&
2445 (q->opacity != OpaqueOpacity))
2447 if (logging != MagickFalse)
2448 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2451 found_transparent_pixel = MagickTrue;
2454 if ((ping_color_type == PNG_COLOR_TYPE_RGB ||
2455 ping_color_type == PNG_COLOR_TYPE_GRAY) &&
2456 (ScaleQuantumToShort(q->red) == transparent_color.red &&
2457 ScaleQuantumToShort(q->green) == transparent_color.green &&
2458 ScaleQuantumToShort(q->blue) == transparent_color.blue))
2460 if (logging != MagickFalse)
2461 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2463 found_transparent_pixel = MagickTrue;
2470 if ((image->previous == (Image *) NULL) && (num_passes == 1))
2472 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
2475 if (status == MagickFalse)
2478 if (SyncAuthenticPixels(image,exception) == MagickFalse)
2482 if ((image->previous == (Image *) NULL) && (num_passes != 1))
2484 status=SetImageProgress(image,LoadImageTag,pass,num_passes);
2485 if (status == MagickFalse)
2491 else /* image->storage_class != DirectClass */
2493 for (pass=0; pass < num_passes; pass++)
2502 Convert grayscale image to PseudoClass pixel packets.
2504 image->matte=ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA ?
2505 MagickTrue : MagickFalse;
2507 quantum_scanline=(Quantum *) AcquireQuantumMemory(image->columns,
2508 (image->matte ? 2 : 1)*sizeof(*quantum_scanline));
2510 if (quantum_scanline == (Quantum *) NULL)
2511 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
2513 for (y=0; y < (ssize_t) image->rows; y++)
2516 row_offset=ping_rowbytes*y;
2521 png_read_row(ping,ping_pixels+row_offset,NULL);
2522 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
2524 if (q == (PixelPacket *) NULL)
2527 indexes=GetAuthenticIndexQueue(image);
2528 p=ping_pixels+row_offset;
2531 switch (ping_bit_depth)
2538 for (x=(ssize_t) image->columns-7; x > 0; x-=8)
2540 for (bit=7; bit >= 0; bit--)
2541 *r++=(Quantum) ((*p) & (0x01 << bit) ? 0x01 : 0x00);
2545 if ((image->columns % 8) != 0)
2547 for (bit=7; bit >= (ssize_t) (8-(image->columns % 8)); bit--)
2548 *r++=(Quantum) ((*p) & (0x01 << bit) ? 0x01 : 0x00);
2556 for (x=(ssize_t) image->columns-3; x > 0; x-=4)
2558 *r++=(*p >> 6) & 0x03;
2559 *r++=(*p >> 4) & 0x03;
2560 *r++=(*p >> 2) & 0x03;
2564 if ((image->columns % 4) != 0)
2566 for (i=3; i >= (ssize_t) (4-(image->columns % 4)); i--)
2567 *r++=(Quantum) ((*p >> (i*2)) & 0x03);
2575 for (x=(ssize_t) image->columns-1; x > 0; x-=2)
2577 *r++=(*p >> 4) & 0x0f;
2581 if ((image->columns % 2) != 0)
2582 *r++=(*p++ >> 4) & 0x0f;
2589 if (ping_color_type == 4)
2590 for (x=(ssize_t) image->columns-1; x >= 0; x--)
2593 /* In image.h, OpaqueOpacity is 0
2594 * TransparentOpacity is QuantumRange
2595 * In a PNG datastream, Opaque is QuantumRange
2596 * and Transparent is 0.
2598 q->opacity=ScaleCharToQuantum((unsigned char) (255-(*p++)));
2599 if (q->opacity != OpaqueOpacity)
2600 found_transparent_pixel = MagickTrue;
2605 for (x=(ssize_t) image->columns-1; x >= 0; x--)
2613 for (x=(ssize_t) image->columns-1; x >= 0; x--)
2615 #if (MAGICKCORE_QUANTUM_DEPTH == 16)
2619 if (image->colors > 256)
2627 *r=(Quantum) quantum;
2630 if (ping_color_type == 4)
2632 quantum=((*p++) << 8);
2634 q->opacity=(Quantum) (QuantumRange-quantum);
2635 if (q->opacity != OpaqueOpacity)
2636 found_transparent_pixel = MagickTrue;
2640 #if (MAGICKCORE_QUANTUM_DEPTH == 32)
2644 if (image->colors > 256)
2655 if (ping_color_type == 4)
2657 q->opacity=(*p << 8) | *(p+1);
2659 q->opacity=(Quantum) GetAlphaPixelComponent(q);
2660 if (q->opacity != OpaqueOpacity)
2661 found_transparent_pixel = MagickTrue;
2666 #else /* MAGICKCORE_QUANTUM_DEPTH == 8 */
2668 p++; /* strip low byte */
2670 if (ping_color_type == 4)
2672 q->opacity=(Quantum) (QuantumRange-(*p++));
2673 if (q->opacity != OpaqueOpacity)
2674 found_transparent_pixel = MagickTrue;
2689 Transfer image scanline.
2693 for (x=0; x < (ssize_t) image->columns; x++)
2694 indexes[x]=(IndexPacket) (*r++);
2696 if (SyncAuthenticPixels(image,exception) == MagickFalse)
2699 if ((image->previous == (Image *) NULL) && (num_passes == 1))
2701 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
2704 if (status == MagickFalse)
2709 if ((image->previous == (Image *) NULL) && (num_passes != 1))
2711 status=SetImageProgress(image,LoadImageTag,pass,num_passes);
2713 if (status == MagickFalse)
2717 quantum_scanline=(Quantum *) RelinquishMagickMemory(quantum_scanline);
2720 image->matte=found_transparent_pixel;
2722 if (logging != MagickFalse)
2724 if (found_transparent_pixel != MagickFalse)
2725 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2726 " Found transparent pixel");
2729 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2730 " No transparent pixel was found");
2732 ping_color_type&=0x03;
2737 if (quantum_info != (QuantumInfo *) NULL)
2738 quantum_info=DestroyQuantumInfo(quantum_info);
2740 if (image->storage_class == PseudoClass)
2746 image->matte=MagickFalse;
2747 (void) SyncImage(image);
2751 png_read_end(ping,ping_info);
2753 if (image_info->number_scenes != 0 && mng_info->scenes_found-1 <
2754 (ssize_t) image_info->first_scene && image->delay != 0)
2756 png_destroy_read_struct(&ping,&ping_info,&end_info);
2757 ping_pixels=(unsigned char *) RelinquishMagickMemory(ping_pixels);
2759 (void) SetImageBackgroundColor(image);
2760 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
2761 UnlockSemaphoreInfo(ping_semaphore);
2763 if (logging != MagickFalse)
2764 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2765 " exit ReadOnePNGImage() early.");
2769 if (png_get_valid(ping,ping_info,PNG_INFO_tRNS))
2775 Image has a transparent background.
2777 storage_class=image->storage_class;
2778 image->matte=MagickTrue;
2780 /* Balfour fix from imagemagick discourse server, 5 Feb 2010 */
2782 if (storage_class == PseudoClass)
2784 if ((int) ping_color_type == PNG_COLOR_TYPE_PALETTE)
2786 for (x=0; x < ping_num_trans; x++)
2788 image->colormap[x].opacity =
2789 ScaleCharToQuantum((unsigned char)(255-ping_trans_alpha[x]));
2793 else if (ping_color_type == PNG_COLOR_TYPE_GRAY)
2795 for (x=0; x < (int) image->colors; x++)
2797 if (ScaleQuantumToShort(image->colormap[x].red) ==
2798 transparent_color.opacity)
2800 image->colormap[x].opacity = (Quantum) TransparentOpacity;
2804 (void) SyncImage(image);
2807 #if 1 /* Should have already been done above, but glennrp problem P10
2812 for (y=0; y < (ssize_t) image->rows; y++)
2814 image->storage_class=storage_class;
2815 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
2817 if (q == (PixelPacket *) NULL)
2820 indexes=GetAuthenticIndexQueue(image);
2822 /* Caution: on a Q8 build, this does not distinguish between
2823 * 16-bit colors that differ only in the low byte
2825 for (x=(ssize_t) image->columns-1; x >= 0; x--)
2827 if (ScaleQuantumToShort(q->red) == transparent_color.red &&
2828 ScaleQuantumToShort(q->green) == transparent_color.green &&
2829 ScaleQuantumToShort(q->blue) == transparent_color.blue)
2831 q->opacity=(Quantum) TransparentOpacity;
2834 #if 0 /* I have not found a case where this is needed. */
2837 q->opacity=(Quantum) OpaqueOpacity;
2844 if (SyncAuthenticPixels(image,exception) == MagickFalse)
2850 image->storage_class=DirectClass;
2853 if ((ping_color_type == PNG_COLOR_TYPE_GRAY) ||
2854 (ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
2855 image->colorspace=GRAYColorspace;
2857 if (png_get_text(ping,ping_info,&text,&num_text) != 0)
2858 for (i=0; i < (ssize_t) num_text; i++)
2860 /* Check for a profile */
2862 if (logging != MagickFalse)
2863 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2864 " Reading PNG text chunk");
2866 if (memcmp(text[i].key, "Raw profile type ",17) == 0)
2867 (void) Magick_png_read_raw_profile(image,image_info,text,(int) i);
2874 length=text[i].text_length;
2875 value=(char *) AcquireQuantumMemory(length+MaxTextExtent,
2877 if (value == (char *) NULL)
2879 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2880 ResourceLimitError,"MemoryAllocationFailed","`%s'",
2885 (void) ConcatenateMagickString(value,text[i].text,length+2);
2887 /* Don't save "density" or "units" property if we have a pHYs
2890 if (!png_get_valid(ping,ping_info,PNG_INFO_pHYs) ||
2891 (LocaleCompare(text[i].key,"density") != 0 &&
2892 LocaleCompare(text[i].key,"units") != 0))
2893 (void) SetImageProperty(image,text[i].key,value);
2895 if (logging != MagickFalse)
2897 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2898 " length: %lu",(unsigned long) length);
2899 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2900 " Keyword: %s",text[i].key);
2903 value=DestroyString(value);
2907 #ifdef MNG_OBJECT_BUFFERS
2909 Store the object if necessary.
2911 if (object_id && !mng_info->frozen[object_id])
2913 if (mng_info->ob[object_id] == (MngBuffer *) NULL)
2916 create a new object buffer.
2918 mng_info->ob[object_id]=(MngBuffer *)
2919 AcquireMagickMemory(sizeof(MngBuffer));
2921 if (mng_info->ob[object_id] != (MngBuffer *) NULL)
2923 mng_info->ob[object_id]->image=(Image *) NULL;
2924 mng_info->ob[object_id]->reference_count=1;
2928 if ((mng_info->ob[object_id] == (MngBuffer *) NULL) ||
2929 mng_info->ob[object_id]->frozen)
2931 if (mng_info->ob[object_id] == (MngBuffer *) NULL)
2932 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2933 ResourceLimitError,"MemoryAllocationFailed","`%s'",
2936 if (mng_info->ob[object_id]->frozen)
2937 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2938 ResourceLimitError,"Cannot overwrite frozen MNG object buffer",
2939 "`%s'",image->filename);
2945 if (mng_info->ob[object_id]->image != (Image *) NULL)
2946 mng_info->ob[object_id]->image=DestroyImage
2947 (mng_info->ob[object_id]->image);
2949 mng_info->ob[object_id]->image=CloneImage(image,0,0,MagickTrue,
2952 if (mng_info->ob[object_id]->image != (Image *) NULL)
2953 mng_info->ob[object_id]->image->file=(FILE *) NULL;
2956 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2957 ResourceLimitError,"Cloning image for object buffer failed",
2958 "`%s'",image->filename);
2960 if (ping_width > 250000L || ping_height > 250000L)
2961 png_error(ping,"PNG Image dimensions are too large.");
2963 mng_info->ob[object_id]->width=ping_width;
2964 mng_info->ob[object_id]->height=ping_height;
2965 mng_info->ob[object_id]->color_type=ping_color_type;
2966 mng_info->ob[object_id]->sample_depth=ping_bit_depth;
2967 mng_info->ob[object_id]->interlace_method=ping_interlace_method;
2968 mng_info->ob[object_id]->compression_method=
2969 ping_compression_method;
2970 mng_info->ob[object_id]->filter_method=ping_filter_method;
2972 if (png_get_valid(ping,ping_info,PNG_INFO_PLTE))
2981 Copy the PLTE to the object buffer.
2983 png_get_PLTE(ping,ping_info,&plte,&number_colors);
2984 mng_info->ob[object_id]->plte_length=number_colors;
2986 for (i=0; i < number_colors; i++)
2988 mng_info->ob[object_id]->plte[i]=plte[i];
2993 mng_info->ob[object_id]->plte_length=0;
2998 Relinquish resources.
3000 png_destroy_read_struct(&ping,&ping_info,&end_info);
3002 ping_pixels=(unsigned char *) RelinquishMagickMemory(ping_pixels);
3003 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
3004 UnlockSemaphoreInfo(ping_semaphore);
3007 if (logging != MagickFalse)
3008 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3009 " exit ReadOnePNGImage()");
3013 /* end of reading one PNG image */
3016 static Image *ReadPNGImage(const ImageInfo *image_info,ExceptionInfo *exception)
3031 magic_number[MaxTextExtent];
3039 assert(image_info != (const ImageInfo *) NULL);
3040 assert(image_info->signature == MagickSignature);
3042 if (image_info->debug != MagickFalse)
3043 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
3044 image_info->filename);
3046 assert(exception != (ExceptionInfo *) NULL);
3047 assert(exception->signature == MagickSignature);
3048 logging=LogMagickEvent(CoderEvent,GetMagickModule(),"Enter ReadPNGImage()");
3049 image=AcquireImage(image_info);
3050 mng_info=(MngInfo *) NULL;
3051 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
3053 if (status == MagickFalse)
3054 ThrowReaderException(FileOpenError,"UnableToOpenFile");
3057 Verify PNG signature.
3059 count=ReadBlob(image,8,(unsigned char *) magic_number);
3061 if (count < 8 || memcmp(magic_number,"\211PNG\r\n\032\n",8) != 0)
3062 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
3065 Allocate a MngInfo structure.
3067 have_mng_structure=MagickFalse;
3068 mng_info=(MngInfo *) AcquireMagickMemory(sizeof(MngInfo));
3070 if (mng_info == (MngInfo *) NULL)
3071 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
3074 Initialize members of the MngInfo structure.
3076 (void) ResetMagickMemory(mng_info,0,sizeof(MngInfo));
3077 mng_info->image=image;
3078 have_mng_structure=MagickTrue;
3081 image=ReadOnePNGImage(mng_info,image_info,exception);
3082 MngInfoFreeStruct(mng_info,&have_mng_structure);
3084 if (image == (Image *) NULL)
3086 if (previous != (Image *) NULL)
3088 if (previous->signature != MagickSignature)
3089 ThrowReaderException(CorruptImageError,"CorruptImage");
3091 (void) CloseBlob(previous);
3092 (void) DestroyImageList(previous);
3095 if (logging != MagickFalse)
3096 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3097 "exit ReadPNGImage() with error");
3099 return((Image *) NULL);
3102 (void) CloseBlob(image);
3104 if ((image->columns == 0) || (image->rows == 0))
3106 if (logging != MagickFalse)
3107 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3108 "exit ReadPNGImage() with error.");
3110 ThrowReaderException(CorruptImageError,"CorruptImage");
3113 if (LocaleCompare(image_info->magick,"PNG8") == 0)
3115 (void) SetImageType(image,PaletteType);
3117 if (image->matte != MagickFalse)
3119 /* To do: Reduce to binary transparency */
3123 if (LocaleCompare(image_info->magick,"PNG24") == 0)
3125 (void) SetImageType(image,TrueColorType);
3126 image->matte=MagickFalse;
3129 if (LocaleCompare(image_info->magick,"PNG32") == 0)
3130 (void) SetImageType(image,TrueColorMatteType);
3132 if (logging != MagickFalse)
3133 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3134 " page.w: %.20g, page.h: %.20g,page.x: %.20g, page.y: %.20g.",
3135 (double) image->page.width,(double) image->page.height,
3136 (double) image->page.x,(double) image->page.y);
3138 if (logging != MagickFalse)
3139 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"exit ReadPNGImage()");
3146 #if defined(JNG_SUPPORTED)
3148 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3152 % R e a d O n e J N G I m a g e %
3156 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3158 % ReadOneJNGImage() reads a JPEG Network Graphics (JNG) image file
3159 % (minus the 8-byte signature) and returns it. It allocates the memory
3160 % necessary for the new Image structure and returns a pointer to the new
3163 % JNG support written by Glenn Randers-Pehrson, glennrp@image...
3165 % The format of the ReadOneJNGImage method is:
3167 % Image *ReadOneJNGImage(MngInfo *mng_info, const ImageInfo *image_info,
3168 % ExceptionInfo *exception)
3170 % A description of each parameter follows:
3172 % o mng_info: Specifies a pointer to a MngInfo structure.
3174 % o image_info: the image info.
3176 % o exception: return any errors or warnings in this structure.
3179 static Image *ReadOneJNGImage(MngInfo *mng_info,
3180 const ImageInfo *image_info, ExceptionInfo *exception)
3207 jng_image_sample_depth,
3208 jng_image_compression_method,
3209 jng_image_interlace_method,
3210 jng_alpha_sample_depth,
3211 jng_alpha_compression_method,
3212 jng_alpha_filter_method,
3213 jng_alpha_interlace_method;
3215 register const PixelPacket
3222 register PixelPacket
3225 register unsigned char
3236 jng_alpha_compression_method=0;
3237 jng_alpha_sample_depth=8;
3241 alpha_image=(Image *) NULL;
3242 color_image=(Image *) NULL;
3243 alpha_image_info=(ImageInfo *) NULL;
3244 color_image_info=(ImageInfo *) NULL;
3246 logging=LogMagickEvent(CoderEvent,GetMagickModule(),
3247 " Enter ReadOneJNGImage()");
3249 image=mng_info->image;
3251 if (GetAuthenticPixelQueue(image) != (PixelPacket *) NULL)
3254 Allocate next image structure.
3256 if (logging != MagickFalse)
3257 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3258 " AcquireNextImage()");
3260 AcquireNextImage(image_info,image);
3262 if (GetNextImageInList(image) == (Image *) NULL)
3263 return((Image *) NULL);
3265 image=SyncNextImageInList(image);
3267 mng_info->image=image;
3270 Signature bytes have already been read.
3273 read_JSEP=MagickFalse;
3274 reading_idat=MagickFalse;
3275 skip_to_iend=MagickFalse;
3279 type[MaxTextExtent];
3288 Read a new JNG chunk.
3290 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
3291 2*GetBlobSize(image));
3293 if (status == MagickFalse)
3297 (void) ConcatenateMagickString(type,"errr",MaxTextExtent);
3298 length=ReadBlobMSBLong(image);
3299 count=(unsigned int) ReadBlob(image,4,(unsigned char *) type);
3301 if (logging != MagickFalse)
3302 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3303 " Reading JNG chunk type %c%c%c%c, length: %.20g",
3304 type[0],type[1],type[2],type[3],(double) length);
3306 if (length > PNG_UINT_31_MAX || count == 0)
3307 ThrowReaderException(CorruptImageError,"CorruptImage");
3310 chunk=(unsigned char *) NULL;
3314 chunk=(unsigned char *) AcquireQuantumMemory(length,sizeof(*chunk));
3316 if (chunk == (unsigned char *) NULL)
3317 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
3319 for (i=0; i < (ssize_t) length; i++)
3320 chunk[i]=(unsigned char) ReadBlobByte(image);
3325 (void) ReadBlobMSBLong(image); /* read crc word */
3330 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3335 if (memcmp(type,mng_JHDR,4) == 0)
3339 jng_width=(size_t) ((p[0] << 24) | (p[1] << 16) |
3340 (p[2] << 8) | p[3]);
3341 jng_height=(size_t) ((p[4] << 24) | (p[5] << 16) |
3342 (p[6] << 8) | p[7]);
3343 jng_color_type=p[8];
3344 jng_image_sample_depth=p[9];
3345 jng_image_compression_method=p[10];
3346 jng_image_interlace_method=p[11];
3348 image->interlace=jng_image_interlace_method != 0 ? PNGInterlace :
3351 jng_alpha_sample_depth=p[12];
3352 jng_alpha_compression_method=p[13];
3353 jng_alpha_filter_method=p[14];
3354 jng_alpha_interlace_method=p[15];
3356 if (logging != MagickFalse)
3358 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3359 " jng_width: %16lu",(unsigned long) jng_width);
3361 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3362 " jng_width: %16lu",(unsigned long) jng_height);
3364 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3365 " jng_color_type: %16d",jng_color_type);
3367 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3368 " jng_image_sample_depth: %3d",
3369 jng_image_sample_depth);
3371 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3372 " jng_image_compression_method:%3d",
3373 jng_image_compression_method);
3375 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3376 " jng_image_interlace_method: %3d",
3377 jng_image_interlace_method);
3379 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3380 " jng_alpha_sample_depth: %3d",
3381 jng_alpha_sample_depth);
3383 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3384 " jng_alpha_compression_method:%3d",
3385 jng_alpha_compression_method);
3387 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3388 " jng_alpha_filter_method: %3d",
3389 jng_alpha_filter_method);
3391 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3392 " jng_alpha_interlace_method: %3d",
3393 jng_alpha_interlace_method);
3398 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3404 if ((reading_idat == MagickFalse) && (read_JSEP == MagickFalse) &&
3405 ((memcmp(type,mng_JDAT,4) == 0) || (memcmp(type,mng_JdAA,4) == 0) ||
3406 (memcmp(type,mng_IDAT,4) == 0) || (memcmp(type,mng_JDAA,4) == 0)))
3409 o create color_image
3410 o open color_blob, attached to color_image
3411 o if (color type has alpha)
3412 open alpha_blob, attached to alpha_image
3415 color_image_info=(ImageInfo *)AcquireMagickMemory(sizeof(ImageInfo));
3417 if (color_image_info == (ImageInfo *) NULL)
3418 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
3420 GetImageInfo(color_image_info);
3421 color_image=AcquireImage(color_image_info);
3423 if (color_image == (Image *) NULL)
3424 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
3426 if (logging != MagickFalse)
3427 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3428 " Creating color_blob.");
3430 (void) AcquireUniqueFilename(color_image->filename);
3431 status=OpenBlob(color_image_info,color_image,WriteBinaryBlobMode,
3434 if (status == MagickFalse)
3435 return((Image *) NULL);
3437 if ((image_info->ping == MagickFalse) && (jng_color_type >= 12))
3439 alpha_image_info=(ImageInfo *)
3440 AcquireMagickMemory(sizeof(ImageInfo));
3442 if (alpha_image_info == (ImageInfo *) NULL)
3443 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
3445 GetImageInfo(alpha_image_info);
3446 alpha_image=AcquireImage(alpha_image_info);
3448 if (alpha_image == (Image *) NULL)
3450 alpha_image=DestroyImage(alpha_image);
3451 ThrowReaderException(ResourceLimitError,
3452 "MemoryAllocationFailed");
3455 if (logging != MagickFalse)
3456 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3457 " Creating alpha_blob.");
3459 (void) AcquireUniqueFilename(alpha_image->filename);
3460 status=OpenBlob(alpha_image_info,alpha_image,WriteBinaryBlobMode,
3463 if (status == MagickFalse)
3464 return((Image *) NULL);
3466 if (jng_alpha_compression_method == 0)
3471 if (logging != MagickFalse)
3472 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3473 " Writing IHDR chunk to alpha_blob.");
3475 (void) WriteBlob(alpha_image,8,(const unsigned char *)
3476 "\211PNG\r\n\032\n");
3478 (void) WriteBlobMSBULong(alpha_image,13L);
3479 PNGType(data,mng_IHDR);
3480 LogPNGChunk(logging,mng_IHDR,13L);
3481 PNGLong(data+4,jng_width);
3482 PNGLong(data+8,jng_height);
3483 data[12]=jng_alpha_sample_depth;
3484 data[13]=0; /* color_type gray */
3485 data[14]=0; /* compression method 0 */
3486 data[15]=0; /* filter_method 0 */
3487 data[16]=0; /* interlace_method 0 */
3488 (void) WriteBlob(alpha_image,17,data);
3489 (void) WriteBlobMSBULong(alpha_image,crc32(0,data,17));
3492 reading_idat=MagickTrue;
3495 if (memcmp(type,mng_JDAT,4) == 0)
3497 /* Copy chunk to color_image->blob */
3499 if (logging != MagickFalse)
3500 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3501 " Copying JDAT chunk data to color_blob.");
3503 (void) WriteBlob(color_image,length,chunk);
3506 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3511 if (memcmp(type,mng_IDAT,4) == 0)
3516 /* Copy IDAT header and chunk data to alpha_image->blob */
3518 if (image_info->ping == MagickFalse)
3520 if (logging != MagickFalse)
3521 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3522 " Copying IDAT chunk data to alpha_blob.");
3524 (void) WriteBlobMSBULong(alpha_image,(size_t) length);
3525 PNGType(data,mng_IDAT);
3526 LogPNGChunk(logging,mng_IDAT,length);
3527 (void) WriteBlob(alpha_image,4,data);
3528 (void) WriteBlob(alpha_image,length,chunk);
3529 (void) WriteBlobMSBULong(alpha_image,
3530 crc32(crc32(0,data,4),chunk,(uInt) length));
3534 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3539 if ((memcmp(type,mng_JDAA,4) == 0) || (memcmp(type,mng_JdAA,4) == 0))
3541 /* Copy chunk data to alpha_image->blob */
3543 if (image_info->ping == MagickFalse)
3545 if (logging != MagickFalse)
3546 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3547 " Copying JDAA chunk data to alpha_blob.");
3549 (void) WriteBlob(alpha_image,length,chunk);
3553 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3558 if (memcmp(type,mng_JSEP,4) == 0)
3560 read_JSEP=MagickTrue;
3563 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3568 if (memcmp(type,mng_bKGD,4) == 0)
3572 image->background_color.red=ScaleCharToQuantum(p[1]);
3573 image->background_color.green=image->background_color.red;
3574 image->background_color.blue=image->background_color.red;
3579 image->background_color.red=ScaleCharToQuantum(p[1]);
3580 image->background_color.green=ScaleCharToQuantum(p[3]);
3581 image->background_color.blue=ScaleCharToQuantum(p[5]);
3584 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3588 if (memcmp(type,mng_gAMA,4) == 0)
3591 image->gamma=((float) mng_get_long(p))*0.00001;
3593 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3597 if (memcmp(type,mng_cHRM,4) == 0)
3601 image->chromaticity.white_point.x=0.00001*mng_get_long(p);
3602 image->chromaticity.white_point.y=0.00001*mng_get_long(&p[4]);
3603 image->chromaticity.red_primary.x=0.00001*mng_get_long(&p[8]);
3604 image->chromaticity.red_primary.y=0.00001*mng_get_long(&p[12]);
3605 image->chromaticity.green_primary.x=0.00001*mng_get_long(&p[16]);
3606 image->chromaticity.green_primary.y=0.00001*mng_get_long(&p[20]);
3607 image->chromaticity.blue_primary.x=0.00001*mng_get_long(&p[24]);
3608 image->chromaticity.blue_primary.y=0.00001*mng_get_long(&p[28]);
3611 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3615 if (memcmp(type,mng_sRGB,4) == 0)
3619 image->rendering_intent=
3620 Magick_RenderingIntent_from_PNG_RenderingIntent(p[0]);
3621 image->gamma=0.45455f;
3622 image->chromaticity.red_primary.x=0.6400f;
3623 image->chromaticity.red_primary.y=0.3300f;
3624 image->chromaticity.green_primary.x=0.3000f;
3625 image->chromaticity.green_primary.y=0.6000f;
3626 image->chromaticity.blue_primary.x=0.1500f;
3627 image->chromaticity.blue_primary.y=0.0600f;
3628 image->chromaticity.white_point.x=0.3127f;
3629 image->chromaticity.white_point.y=0.3290f;
3632 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3636 if (memcmp(type,mng_oFFs,4) == 0)
3640 image->page.x=(ssize_t) mng_get_long(p);
3641 image->page.y=(ssize_t) mng_get_long(&p[4]);
3643 if ((int) p[8] != 0)
3645 image->page.x/=10000;
3646 image->page.y/=10000;
3651 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3656 if (memcmp(type,mng_pHYs,4) == 0)
3660 image->x_resolution=(double) mng_get_long(p);
3661 image->y_resolution=(double) mng_get_long(&p[4]);
3662 if ((int) p[8] == PNG_RESOLUTION_METER)
3664 image->units=PixelsPerCentimeterResolution;
3665 image->x_resolution=image->x_resolution/100.0f;
3666 image->y_resolution=image->y_resolution/100.0f;
3670 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3675 if (memcmp(type,mng_iCCP,4) == 0)
3679 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3686 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
3688 if (memcmp(type,mng_IEND,4))
3698 Finish up reading image data:
3700 o read main image from color_blob.
3704 o if (color_type has alpha)
3705 if alpha_encoding is PNG
3706 read secondary image from alpha_blob via ReadPNG
3707 if alpha_encoding is JPEG
3708 read secondary image from alpha_blob via ReadJPEG
3712 o copy intensity of secondary image into
3713 opacity samples of main image.
3715 o destroy the secondary image.
3718 (void) CloseBlob(color_image);
3720 if (logging != MagickFalse)
3721 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3722 " Reading jng_image from color_blob.");
3724 (void) FormatMagickString(color_image_info->filename,MaxTextExtent,"%s",
3725 color_image->filename);
3727 color_image_info->ping=MagickFalse; /* To do: avoid this */
3728 jng_image=ReadImage(color_image_info,exception);
3730 if (jng_image == (Image *) NULL)
3731 return((Image *) NULL);
3733 (void) RelinquishUniqueFileResource(color_image->filename);
3734 color_image=DestroyImage(color_image);
3735 color_image_info=DestroyImageInfo(color_image_info);
3737 if (jng_image == (Image *) NULL)
3738 return((Image *) NULL);
3740 if (logging != MagickFalse)
3741 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3742 " Copying jng_image pixels to main image.");
3744 image->rows=jng_height;
3745 image->columns=jng_width;
3746 length=image->columns*sizeof(PixelPacket);
3748 for (y=0; y < (ssize_t) image->rows; y++)
3750 s=GetVirtualPixels(jng_image,0,y,image->columns,1,&image->exception);
3751 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
3752 (void) CopyMagickMemory(q,s,length);
3754 if (SyncAuthenticPixels(image,exception) == MagickFalse)
3758 jng_image=DestroyImage(jng_image);
3760 if (image_info->ping == MagickFalse)
3762 if (jng_color_type >= 12)
3764 if (jng_alpha_compression_method == 0)
3768 (void) WriteBlobMSBULong(alpha_image,0x00000000L);
3769 PNGType(data,mng_IEND);
3770 LogPNGChunk(logging,mng_IEND,0L);
3771 (void) WriteBlob(alpha_image,4,data);
3772 (void) WriteBlobMSBULong(alpha_image,crc32(0,data,4));
3775 (void) CloseBlob(alpha_image);
3777 if (logging != MagickFalse)
3778 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3779 " Reading opacity from alpha_blob.");
3781 (void) FormatMagickString(alpha_image_info->filename,MaxTextExtent,
3782 "%s",alpha_image->filename);
3784 jng_image=ReadImage(alpha_image_info,exception);
3786 if (jng_image != (Image *) NULL)
3787 for (y=0; y < (ssize_t) image->rows; y++)
3789 s=GetVirtualPixels(jng_image,0,y,image->columns,1,
3791 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
3793 if (image->matte != MagickFalse)
3794 for (x=(ssize_t) image->columns; x != 0; x--,q++,s++)
3795 q->opacity=(Quantum) QuantumRange-s->red;
3798 for (x=(ssize_t) image->columns; x != 0; x--,q++,s++)
3800 q->opacity=(Quantum) QuantumRange-s->red;
3801 if (q->opacity != OpaqueOpacity)
3802 image->matte=MagickTrue;
3805 if (SyncAuthenticPixels(image,exception) == MagickFalse)
3808 (void) RelinquishUniqueFileResource(alpha_image->filename);
3809 alpha_image=DestroyImage(alpha_image);
3810 alpha_image_info=DestroyImageInfo(alpha_image_info);
3811 if (jng_image != (Image *) NULL)
3812 jng_image=DestroyImage(jng_image);
3816 /* Read the JNG image. */
3818 if (mng_info->mng_type == 0)
3820 mng_info->mng_width=jng_width;
3821 mng_info->mng_height=jng_height;
3824 if (image->page.width == 0 && image->page.height == 0)
3826 image->page.width=jng_width;
3827 image->page.height=jng_height;
3830 if (image->page.x == 0 && image->page.y == 0)
3832 image->page.x=mng_info->x_off[mng_info->object_id];
3833 image->page.y=mng_info->y_off[mng_info->object_id];
3838 image->page.y=mng_info->y_off[mng_info->object_id];
3841 mng_info->image_found++;
3842 status=SetImageProgress(image,LoadImagesTag,2*TellBlob(image),
3843 2*GetBlobSize(image));
3845 if (logging != MagickFalse)
3846 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3847 " exit ReadOneJNGImage()");
3853 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3857 % R e a d J N G I m a g e %
3861 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3863 % ReadJNGImage() reads a JPEG Network Graphics (JNG) image file
3864 % (including the 8-byte signature) and returns it. It allocates the memory
3865 % necessary for the new Image structure and returns a pointer to the new
3868 % JNG support written by Glenn Randers-Pehrson, glennrp@image...
3870 % The format of the ReadJNGImage method is:
3872 % Image *ReadJNGImage(const ImageInfo *image_info, ExceptionInfo
3875 % A description of each parameter follows:
3877 % o image_info: the image info.
3879 % o exception: return any errors or warnings in this structure.
3883 static Image *ReadJNGImage(const ImageInfo *image_info,ExceptionInfo *exception)
3898 magic_number[MaxTextExtent];
3906 assert(image_info != (const ImageInfo *) NULL);
3907 assert(image_info->signature == MagickSignature);
3908 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image_info->filename);
3909 assert(exception != (ExceptionInfo *) NULL);
3910 assert(exception->signature == MagickSignature);
3911 logging=LogMagickEvent(CoderEvent,GetMagickModule(),"Enter ReadJNGImage()");
3912 image=AcquireImage(image_info);
3913 mng_info=(MngInfo *) NULL;
3914 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
3916 if (status == MagickFalse)
3917 return((Image *) NULL);
3919 if (LocaleCompare(image_info->magick,"JNG") != 0)
3920 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
3922 /* Verify JNG signature. */
3924 count=(size_t) ReadBlob(image,8,(unsigned char *) magic_number);
3926 if (count < 8 || memcmp(magic_number,"\213JNG\r\n\032\n",8) != 0)
3927 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
3929 /* Allocate a MngInfo structure. */
3931 have_mng_structure=MagickFalse;
3932 mng_info=(MngInfo *) AcquireMagickMemory(sizeof(*mng_info));
3934 if (mng_info == (MngInfo *) NULL)
3935 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
3937 /* Initialize members of the MngInfo structure. */
3939 (void) ResetMagickMemory(mng_info,0,sizeof(MngInfo));
3940 have_mng_structure=MagickTrue;
3942 mng_info->image=image;
3944 image=ReadOneJNGImage(mng_info,image_info,exception);
3945 MngInfoFreeStruct(mng_info,&have_mng_structure);
3947 if (image == (Image *) NULL)
3949 if (IsImageObject(previous) != MagickFalse)
3951 (void) CloseBlob(previous);
3952 (void) DestroyImageList(previous);
3955 if (logging != MagickFalse)
3956 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3957 "exit ReadJNGImage() with error");
3959 return((Image *) NULL);
3961 (void) CloseBlob(image);
3963 if (image->columns == 0 || image->rows == 0)
3965 if (logging != MagickFalse)
3966 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
3967 "exit ReadJNGImage() with error");
3969 ThrowReaderException(CorruptImageError,"CorruptImage");
3972 if (logging != MagickFalse)
3973 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"exit ReadJNGImage()");
3979 static Image *ReadMNGImage(const ImageInfo *image_info,ExceptionInfo *exception)
3982 page_geometry[MaxTextExtent];
4015 #if defined(MNG_INSERT_LAYERS)
4017 mng_background_color;
4020 register unsigned char
4035 #if defined(MNG_INSERT_LAYERS)
4040 volatile unsigned int
4041 #ifdef MNG_OBJECT_BUFFERS
4042 mng_background_object=0,
4044 mng_type=0; /* 0: PNG or JNG; 1: MNG; 2: MNG-LC; 3: MNG-VLC */
4047 default_frame_timeout,
4049 #if defined(MNG_INSERT_LAYERS)
4055 /* These delays are all measured in image ticks_per_second,
4056 * not in MNG ticks_per_second
4059 default_frame_delay,
4063 #if defined(MNG_INSERT_LAYERS)
4072 previous_fb.bottom=0;
4074 previous_fb.right=0;
4076 default_fb.bottom=0;
4080 /* Open image file. */
4082 assert(image_info != (const ImageInfo *) NULL);
4083 assert(image_info->signature == MagickSignature);
4084 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image_info->filename);
4085 assert(exception != (ExceptionInfo *) NULL);
4086 assert(exception->signature == MagickSignature);
4087 logging=LogMagickEvent(CoderEvent,GetMagickModule(),"Enter ReadMNGImage()");
4088 image=AcquireImage(image_info);
4089 mng_info=(MngInfo *) NULL;
4090 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
4092 if (status == MagickFalse)
4093 return((Image *) NULL);
4095 first_mng_object=MagickFalse;
4097 have_mng_structure=MagickFalse;
4099 /* Allocate a MngInfo structure. */
4101 mng_info=(MngInfo *) AcquireMagickMemory(sizeof(MngInfo));
4103 if (mng_info == (MngInfo *) NULL)
4104 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
4106 /* Initialize members of the MngInfo structure. */
4108 (void) ResetMagickMemory(mng_info,0,sizeof(MngInfo));
4109 mng_info->image=image;
4110 have_mng_structure=MagickTrue;
4112 if (LocaleCompare(image_info->magick,"MNG") == 0)
4115 magic_number[MaxTextExtent];
4117 /* Verify MNG signature. */
4118 count=(size_t) ReadBlob(image,8,(unsigned char *) magic_number);
4119 if (memcmp(magic_number,"\212MNG\r\n\032\n",8) != 0)
4120 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
4122 /* Initialize some nonzero members of the MngInfo structure. */
4123 for (i=0; i < MNG_MAX_OBJECTS; i++)
4125 mng_info->object_clip[i].right=(ssize_t) PNG_UINT_31_MAX;
4126 mng_info->object_clip[i].bottom=(ssize_t) PNG_UINT_31_MAX;
4128 mng_info->exists[0]=MagickTrue;
4131 first_mng_object=MagickTrue;
4133 #if defined(MNG_INSERT_LAYERS)
4134 insert_layers=MagickFalse; /* should be False when converting or mogrifying */
4136 default_frame_delay=0;
4137 default_frame_timeout=0;
4140 mng_info->ticks_per_second=1UL*image->ticks_per_second;
4142 skip_to_iend=MagickFalse;
4143 term_chunk_found=MagickFalse;
4144 mng_info->framing_mode=1;
4145 #if defined(MNG_INSERT_LAYERS)
4146 mandatory_back=MagickFalse;
4148 #if defined(MNG_INSERT_LAYERS)
4149 mng_background_color=image->background_color;
4151 default_fb=mng_info->frame;
4152 previous_fb=mng_info->frame;
4156 type[MaxTextExtent];
4158 if (LocaleCompare(image_info->magick,"MNG") == 0)
4167 (void) ConcatenateMagickString(type,"errr",MaxTextExtent);
4168 length=ReadBlobMSBLong(image);
4169 count=(size_t) ReadBlob(image,4,(unsigned char *) type);
4171 if (logging != MagickFalse)
4172 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4173 " Reading MNG chunk type %c%c%c%c, length: %.20g",
4174 type[0],type[1],type[2],type[3],(double) length);
4176 if (length > PNG_UINT_31_MAX)
4180 ThrowReaderException(CorruptImageError,"CorruptImage");
4183 chunk=(unsigned char *) NULL;
4187 chunk=(unsigned char *) AcquireQuantumMemory(length,sizeof(*chunk));
4189 if (chunk == (unsigned char *) NULL)
4190 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
4192 for (i=0; i < (ssize_t) length; i++)
4193 chunk[i]=(unsigned char) ReadBlobByte(image);
4198 (void) ReadBlobMSBLong(image); /* read crc word */
4200 #if !defined(JNG_SUPPORTED)
4201 if (memcmp(type,mng_JHDR,4) == 0)
4203 skip_to_iend=MagickTrue;
4205 if (mng_info->jhdr_warning == 0)
4206 (void) ThrowMagickException(&image->exception,GetMagickModule(),
4207 CoderError,"JNGCompressNotSupported","`%s'",image->filename);
4209 mng_info->jhdr_warning++;
4212 if (memcmp(type,mng_DHDR,4) == 0)
4214 skip_to_iend=MagickTrue;
4216 if (mng_info->dhdr_warning == 0)
4217 (void) ThrowMagickException(&image->exception,GetMagickModule(),
4218 CoderError,"DeltaPNGNotSupported","`%s'",image->filename);
4220 mng_info->dhdr_warning++;
4222 if (memcmp(type,mng_MEND,4) == 0)
4227 if (memcmp(type,mng_IEND,4) == 0)
4228 skip_to_iend=MagickFalse;
4231 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4233 if (logging != MagickFalse)
4234 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4240 if (memcmp(type,mng_MHDR,4) == 0)
4242 mng_info->mng_width=(size_t) ((p[0] << 24) | (p[1] << 16) |
4243 (p[2] << 8) | p[3]);
4245 mng_info->mng_height=(size_t) ((p[4] << 24) | (p[5] << 16) |
4246 (p[6] << 8) | p[7]);
4248 if (logging != MagickFalse)
4250 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4251 " MNG width: %.20g",(double) mng_info->mng_width);
4252 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4253 " MNG height: %.20g",(double) mng_info->mng_height);
4257 mng_info->ticks_per_second=(size_t) mng_get_long(p);
4259 if (mng_info->ticks_per_second == 0)
4260 default_frame_delay=0;
4263 default_frame_delay=1UL*image->ticks_per_second/
4264 mng_info->ticks_per_second;
4266 frame_delay=default_frame_delay;
4272 simplicity=(size_t) mng_get_long(p);
4275 mng_type=1; /* Full MNG */
4277 if ((simplicity != 0) && ((simplicity | 11) == 11))
4278 mng_type=2; /* LC */
4280 if ((simplicity != 0) && ((simplicity | 9) == 9))
4281 mng_type=3; /* VLC */
4283 #if defined(MNG_INSERT_LAYERS)
4285 insert_layers=MagickTrue;
4287 if (GetAuthenticPixelQueue(image) != (PixelPacket *) NULL)
4289 /* Allocate next image structure. */
4290 AcquireNextImage(image_info,image);
4292 if (GetNextImageInList(image) == (Image *) NULL)
4293 return((Image *) NULL);
4295 image=SyncNextImageInList(image);
4296 mng_info->image=image;
4299 if ((mng_info->mng_width > 65535L) ||
4300 (mng_info->mng_height > 65535L))
4301 ThrowReaderException(ImageError,"WidthOrHeightExceedsLimit");
4303 (void) FormatMagickString(page_geometry,MaxTextExtent,
4304 "%.20gx%.20g+0+0",(double) mng_info->mng_width,(double)
4305 mng_info->mng_height);
4307 mng_info->frame.left=0;
4308 mng_info->frame.right=(ssize_t) mng_info->mng_width;
4309 mng_info->frame.top=0;
4310 mng_info->frame.bottom=(ssize_t) mng_info->mng_height;
4311 mng_info->clip=default_fb=previous_fb=mng_info->frame;
4313 for (i=0; i < MNG_MAX_OBJECTS; i++)
4314 mng_info->object_clip[i]=mng_info->frame;
4316 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4320 if (memcmp(type,mng_TERM,4) == 0)
4331 final_delay=(png_uint_32) mng_get_long(&p[2]);
4332 mng_iterations=(png_uint_32) mng_get_long(&p[6]);
4334 if (mng_iterations == PNG_UINT_31_MAX)
4337 image->iterations=mng_iterations;
4338 term_chunk_found=MagickTrue;
4341 if (logging != MagickFalse)
4343 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4344 " repeat=%d",repeat);
4346 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4347 " final_delay=%.20g",(double) final_delay);
4349 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4350 " image->iterations=%.20g",(double) image->iterations);
4353 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4356 if (memcmp(type,mng_DEFI,4) == 0)
4359 (void) ThrowMagickException(&image->exception,GetMagickModule(),
4360 CoderError,"DEFI chunk found in MNG-VLC datastream","`%s'",
4363 object_id=(p[0] << 8) | p[1];
4365 if (mng_type == 2 && object_id != 0)
4366 (void) ThrowMagickException(&image->exception,GetMagickModule(),
4367 CoderError,"Nonzero object_id in MNG-LC datastream","`%s'",
4370 if (object_id > MNG_MAX_OBJECTS)
4373 Instead ofsuing a warning we should allocate a larger
4374 MngInfo structure and continue.
4376 (void) ThrowMagickException(&image->exception,GetMagickModule(),
4377 CoderError,"object id too large","`%s'",image->filename);
4378 object_id=MNG_MAX_OBJECTS;
4381 if (mng_info->exists[object_id])
4382 if (mng_info->frozen[object_id])
4384 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4385 (void) ThrowMagickException(&image->exception,
4386 GetMagickModule(),CoderError,
4387 "DEFI cannot redefine a frozen MNG object","`%s'",
4392 mng_info->exists[object_id]=MagickTrue;
4395 mng_info->invisible[object_id]=p[2];
4398 Extract object offset info.
4402 mng_info->x_off[object_id]=(ssize_t) ((p[4] << 24) |
4403 (p[5] << 16) | (p[6] << 8) | p[7]);
4405 mng_info->y_off[object_id]=(ssize_t) ((p[8] << 24) |
4406 (p[9] << 16) | (p[10] << 8) | p[11]);
4408 if (logging != MagickFalse)
4410 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4411 " x_off[%d]: %.20g",object_id,(double)
4412 mng_info->x_off[object_id]);
4414 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4415 " y_off[%d]: %.20g",object_id,(double)
4416 mng_info->y_off[object_id]);
4421 Extract object clipping info.
4424 mng_info->object_clip[object_id]=mng_read_box(mng_info->frame,0,
4427 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4430 if (memcmp(type,mng_bKGD,4) == 0)
4432 mng_info->have_global_bkgd=MagickFalse;
4436 mng_info->mng_global_bkgd.red=
4437 ScaleShortToQuantum((unsigned short) ((p[0] << 8) | p[1]));
4439 mng_info->mng_global_bkgd.green=
4440 ScaleShortToQuantum((unsigned short) ((p[2] << 8) | p[3]));
4442 mng_info->mng_global_bkgd.blue=
4443 ScaleShortToQuantum((unsigned short) ((p[4] << 8) | p[5]));
4445 mng_info->have_global_bkgd=MagickTrue;
4448 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4451 if (memcmp(type,mng_BACK,4) == 0)
4453 #if defined(MNG_INSERT_LAYERS)
4455 mandatory_back=p[6];
4460 if (mandatory_back && length > 5)
4462 mng_background_color.red=
4463 ScaleShortToQuantum((unsigned short) ((p[0] << 8) | p[1]));
4465 mng_background_color.green=
4466 ScaleShortToQuantum((unsigned short) ((p[2] << 8) | p[3]));
4468 mng_background_color.blue=
4469 ScaleShortToQuantum((unsigned short) ((p[4] << 8) | p[5]));
4471 mng_background_color.opacity=OpaqueOpacity;
4474 #ifdef MNG_OBJECT_BUFFERS
4476 mng_background_object=(p[7] << 8) | p[8];
4479 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4483 if (memcmp(type,mng_PLTE,4) == 0)
4485 /* Read global PLTE. */
4487 if (length && (length < 769))
4489 if (mng_info->global_plte == (png_colorp) NULL)
4490 mng_info->global_plte=(png_colorp) AcquireQuantumMemory(256,
4491 sizeof(*mng_info->global_plte));
4493 for (i=0; i < (ssize_t) (length/3); i++)
4495 mng_info->global_plte[i].red=p[3*i];
4496 mng_info->global_plte[i].green=p[3*i+1];
4497 mng_info->global_plte[i].blue=p[3*i+2];
4500 mng_info->global_plte_length=(unsigned int) (length/3);
4503 for ( ; i < 256; i++)
4505 mng_info->global_plte[i].red=i;
4506 mng_info->global_plte[i].green=i;
4507 mng_info->global_plte[i].blue=i;
4511 mng_info->global_plte_length=256;
4514 mng_info->global_plte_length=0;
4516 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4520 if (memcmp(type,mng_tRNS,4) == 0)
4522 /* read global tRNS */
4525 for (i=0; i < (ssize_t) length; i++)
4526 mng_info->global_trns[i]=p[i];
4529 for ( ; i < 256; i++)
4530 mng_info->global_trns[i]=255;
4532 mng_info->global_trns_length=(unsigned int) length;
4533 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4536 if (memcmp(type,mng_gAMA,4) == 0)
4543 igamma=mng_get_long(p);
4544 mng_info->global_gamma=((float) igamma)*0.00001;
4545 mng_info->have_global_gama=MagickTrue;
4549 mng_info->have_global_gama=MagickFalse;
4551 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4555 if (memcmp(type,mng_cHRM,4) == 0)
4557 /* Read global cHRM */
4561 mng_info->global_chrm.white_point.x=0.00001*mng_get_long(p);
4562 mng_info->global_chrm.white_point.y=0.00001*mng_get_long(&p[4]);
4563 mng_info->global_chrm.red_primary.x=0.00001*mng_get_long(&p[8]);
4564 mng_info->global_chrm.red_primary.y=0.00001*
4565 mng_get_long(&p[12]);
4566 mng_info->global_chrm.green_primary.x=0.00001*
4567 mng_get_long(&p[16]);
4568 mng_info->global_chrm.green_primary.y=0.00001*
4569 mng_get_long(&p[20]);
4570 mng_info->global_chrm.blue_primary.x=0.00001*
4571 mng_get_long(&p[24]);
4572 mng_info->global_chrm.blue_primary.y=0.00001*
4573 mng_get_long(&p[28]);
4574 mng_info->have_global_chrm=MagickTrue;
4577 mng_info->have_global_chrm=MagickFalse;
4579 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4583 if (memcmp(type,mng_sRGB,4) == 0)
4590 mng_info->global_srgb_intent=
4591 Magick_RenderingIntent_from_PNG_RenderingIntent(p[0]);
4592 mng_info->have_global_srgb=MagickTrue;
4595 mng_info->have_global_srgb=MagickFalse;
4597 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4601 if (memcmp(type,mng_iCCP,4) == 0)
4609 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4614 if (memcmp(type,mng_FRAM,4) == 0)
4617 (void) ThrowMagickException(&image->exception,GetMagickModule(),
4618 CoderError,"FRAM chunk found in MNG-VLC datastream","`%s'",
4621 if ((mng_info->framing_mode == 2) || (mng_info->framing_mode == 4))
4622 image->delay=frame_delay;
4624 frame_delay=default_frame_delay;
4625 frame_timeout=default_frame_timeout;
4630 mng_info->framing_mode=p[0];
4632 if (logging != MagickFalse)
4633 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4634 " Framing_mode=%d",mng_info->framing_mode);
4638 /* Note the delay and frame clipping boundaries. */
4640 p++; /* framing mode */
4642 while (*p && ((p-chunk) < (ssize_t) length))
4643 p++; /* frame name */
4645 p++; /* frame name terminator */
4647 if ((p-chunk) < (ssize_t) (length-4))
4654 change_delay=(*p++);
4655 change_timeout=(*p++);
4656 change_clipping=(*p++);
4657 p++; /* change_sync */
4661 frame_delay=1UL*image->ticks_per_second*
4664 if (mng_info->ticks_per_second != 0)
4665 frame_delay/=mng_info->ticks_per_second;
4668 frame_delay=PNG_UINT_31_MAX;
4670 if (change_delay == 2)
4671 default_frame_delay=frame_delay;
4675 if (logging != MagickFalse)
4676 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4677 " Framing_delay=%.20g",(double) frame_delay);
4682 frame_timeout=1UL*image->ticks_per_second*
4685 if (mng_info->ticks_per_second != 0)
4686 frame_timeout/=mng_info->ticks_per_second;
4689 frame_timeout=PNG_UINT_31_MAX;
4691 if (change_delay == 2)
4692 default_frame_timeout=frame_timeout;
4696 if (logging != MagickFalse)
4697 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4698 " Framing_timeout=%.20g",(double) frame_timeout);
4701 if (change_clipping)
4703 fb=mng_read_box(previous_fb,(char) p[0],&p[1]);
4707 if (logging != MagickFalse)
4708 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4709 " Frame_clip: L=%.20g R=%.20g T=%.20g B=%.20g",
4710 (double) fb.left,(double) fb.right,(double) fb.top,
4711 (double) fb.bottom);
4713 if (change_clipping == 2)
4719 mng_info->clip=mng_minimum_box(fb,mng_info->frame);
4721 subframe_width=(size_t) (mng_info->clip.right
4722 -mng_info->clip.left);
4724 subframe_height=(size_t) (mng_info->clip.bottom
4725 -mng_info->clip.top);
4727 Insert a background layer behind the frame if framing_mode is 4.
4729 #if defined(MNG_INSERT_LAYERS)
4730 if (logging != MagickFalse)
4731 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4732 " subframe_width=%.20g, subframe_height=%.20g",(double)
4733 subframe_width,(double) subframe_height);
4735 if (insert_layers && (mng_info->framing_mode == 4) &&
4736 (subframe_width) && (subframe_height))
4738 /* Allocate next image structure. */
4739 if (GetAuthenticPixelQueue(image) != (PixelPacket *) NULL)
4741 AcquireNextImage(image_info,image);
4743 if (GetNextImageInList(image) == (Image *) NULL)
4745 image=DestroyImageList(image);
4746 MngInfoFreeStruct(mng_info,&have_mng_structure);
4747 return((Image *) NULL);
4750 image=SyncNextImageInList(image);
4753 mng_info->image=image;
4755 if (term_chunk_found)
4757 image->start_loop=MagickTrue;
4758 image->iterations=mng_iterations;
4759 term_chunk_found=MagickFalse;
4763 image->start_loop=MagickFalse;
4765 image->columns=subframe_width;
4766 image->rows=subframe_height;
4767 image->page.width=subframe_width;
4768 image->page.height=subframe_height;
4769 image->page.x=mng_info->clip.left;
4770 image->page.y=mng_info->clip.top;
4771 image->background_color=mng_background_color;
4772 image->matte=MagickFalse;
4774 (void) SetImageBackgroundColor(image);
4776 if (logging != MagickFalse)
4777 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4778 " Insert backgd layer, L=%.20g, R=%.20g T=%.20g, B=%.20g",
4779 (double) mng_info->clip.left,(double) mng_info->clip.right,
4780 (double) mng_info->clip.top,(double) mng_info->clip.bottom);
4783 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4786 if (memcmp(type,mng_CLIP,4) == 0)
4795 first_object=(p[0] << 8) | p[1];
4796 last_object=(p[2] << 8) | p[3];
4798 for (i=(int) first_object; i <= (int) last_object; i++)
4800 if (mng_info->exists[i] && !mng_info->frozen[i])
4805 box=mng_info->object_clip[i];
4806 mng_info->object_clip[i]=mng_read_box(box,(char) p[4],&p[5]);
4810 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4813 if (memcmp(type,mng_SAVE,4) == 0)
4815 for (i=1; i < MNG_MAX_OBJECTS; i++)
4816 if (mng_info->exists[i])
4818 mng_info->frozen[i]=MagickTrue;
4819 #ifdef MNG_OBJECT_BUFFERS
4820 if (mng_info->ob[i] != (MngBuffer *) NULL)
4821 mng_info->ob[i]->frozen=MagickTrue;
4826 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4831 if ((memcmp(type,mng_DISC,4) == 0) || (memcmp(type,mng_SEEK,4) == 0))
4833 /* Read DISC or SEEK. */
4835 if ((length == 0) || !memcmp(type,mng_SEEK,4))
4837 for (i=1; i < MNG_MAX_OBJECTS; i++)
4838 MngInfoDiscardObject(mng_info,i);
4846 for (j=0; j < (ssize_t) length; j+=2)
4848 i=p[j] << 8 | p[j+1];
4849 MngInfoDiscardObject(mng_info,i);
4854 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4859 if (memcmp(type,mng_MOVE,4) == 0)
4867 first_object=(p[0] << 8) | p[1];
4868 last_object=(p[2] << 8) | p[3];
4869 for (i=(ssize_t) first_object; i <= (ssize_t) last_object; i++)
4871 if (mng_info->exists[i] && !mng_info->frozen[i])
4879 old_pair.a=mng_info->x_off[i];
4880 old_pair.b=mng_info->y_off[i];
4881 new_pair=mng_read_pair(old_pair,(int) p[4],&p[5]);
4882 mng_info->x_off[i]=new_pair.a;
4883 mng_info->y_off[i]=new_pair.b;
4887 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4891 if (memcmp(type,mng_LOOP,4) == 0)
4893 ssize_t loop_iters=1;
4894 loop_level=chunk[0];
4895 mng_info->loop_active[loop_level]=1; /* mark loop active */
4897 /* Record starting point. */
4898 loop_iters=mng_get_long(&chunk[1]);
4900 if (logging != MagickFalse)
4901 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4902 " LOOP level %.20g has %.20g iterations ",(double) loop_level,
4903 (double) loop_iters);
4905 if (loop_iters == 0)
4906 skipping_loop=loop_level;
4910 mng_info->loop_jump[loop_level]=TellBlob(image);
4911 mng_info->loop_count[loop_level]=loop_iters;
4914 mng_info->loop_iteration[loop_level]=0;
4915 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4919 if (memcmp(type,mng_ENDL,4) == 0)
4921 loop_level=chunk[0];
4923 if (skipping_loop > 0)
4925 if (skipping_loop == loop_level)
4928 Found end of zero-iteration loop.
4931 mng_info->loop_active[loop_level]=0;
4937 if (mng_info->loop_active[loop_level] == 1)
4939 mng_info->loop_count[loop_level]--;
4940 mng_info->loop_iteration[loop_level]++;
4942 if (logging != MagickFalse)
4943 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
4944 " ENDL: LOOP level %.20g has %.20g remaining iters ",
4945 (double) loop_level,(double)
4946 mng_info->loop_count[loop_level]);
4948 if (mng_info->loop_count[loop_level] != 0)
4950 offset=SeekBlob(image,mng_info->loop_jump[loop_level],
4954 ThrowReaderException(CorruptImageError,
4955 "ImproperImageHeader");
4966 mng_info->loop_active[loop_level]=0;
4968 for (i=0; i < loop_level; i++)
4969 if (mng_info->loop_active[i] == 1)
4970 last_level=(short) i;
4971 loop_level=last_level;
4976 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
4980 if (memcmp(type,mng_CLON,4) == 0)
4982 if (mng_info->clon_warning == 0)
4983 (void) ThrowMagickException(&image->exception,GetMagickModule(),
4984 CoderError,"CLON is not implemented yet","`%s'",
4987 mng_info->clon_warning++;
4990 if (memcmp(type,mng_MAGN,4) == 0)
5005 magn_first=(p[0] << 8) | p[1];
5011 magn_last=(p[2] << 8) | p[3];
5014 magn_last=magn_first;
5015 #ifndef MNG_OBJECT_BUFFERS
5016 if (magn_first || magn_last)
5017 if (mng_info->magn_warning == 0)
5019 (void) ThrowMagickException(&image->exception,
5020 GetMagickModule(),CoderError,
5021 "MAGN is not implemented yet for nonzero objects",
5022 "`%s'",image->filename);
5024 mng_info->magn_warning++;
5034 magn_mx=(p[5] << 8) | p[6];
5043 magn_my=(p[7] << 8) | p[8];
5052 magn_ml=(p[9] << 8) | p[10];
5061 magn_mr=(p[11] << 8) | p[12];
5070 magn_mt=(p[13] << 8) | p[14];
5079 magn_mb=(p[15] << 8) | p[16];
5091 magn_methy=magn_methx;
5094 if (magn_methx > 5 || magn_methy > 5)
5095 if (mng_info->magn_warning == 0)
5097 (void) ThrowMagickException(&image->exception,
5098 GetMagickModule(),CoderError,
5099 "Unknown MAGN method in MNG datastream","`%s'",
5102 mng_info->magn_warning++;
5104 #ifdef MNG_OBJECT_BUFFERS
5105 /* Magnify existing objects in the range magn_first to magn_last */
5107 if (magn_first == 0 || magn_last == 0)
5109 /* Save the magnification factors for object 0 */
5110 mng_info->magn_mb=magn_mb;
5111 mng_info->magn_ml=magn_ml;
5112 mng_info->magn_mr=magn_mr;
5113 mng_info->magn_mt=magn_mt;
5114 mng_info->magn_mx=magn_mx;
5115 mng_info->magn_my=magn_my;
5116 mng_info->magn_methx=magn_methx;
5117 mng_info->magn_methy=magn_methy;
5121 if (memcmp(type,mng_PAST,4) == 0)
5123 if (mng_info->past_warning == 0)
5124 (void) ThrowMagickException(&image->exception,GetMagickModule(),
5125 CoderError,"PAST is not implemented yet","`%s'",
5128 mng_info->past_warning++;
5131 if (memcmp(type,mng_SHOW,4) == 0)
5133 if (mng_info->show_warning == 0)
5134 (void) ThrowMagickException(&image->exception,GetMagickModule(),
5135 CoderError,"SHOW is not implemented yet","`%s'",
5138 mng_info->show_warning++;
5141 if (memcmp(type,mng_sBIT,4) == 0)
5144 mng_info->have_global_sbit=MagickFalse;
5148 mng_info->global_sbit.gray=p[0];
5149 mng_info->global_sbit.red=p[0];
5150 mng_info->global_sbit.green=p[1];
5151 mng_info->global_sbit.blue=p[2];
5152 mng_info->global_sbit.alpha=p[3];
5153 mng_info->have_global_sbit=MagickTrue;
5156 if (memcmp(type,mng_pHYs,4) == 0)
5160 mng_info->global_x_pixels_per_unit=
5161 (size_t) mng_get_long(p);
5162 mng_info->global_y_pixels_per_unit=
5163 (size_t) mng_get_long(&p[4]);
5164 mng_info->global_phys_unit_type=p[8];
5165 mng_info->have_global_phys=MagickTrue;
5169 mng_info->have_global_phys=MagickFalse;
5171 if (memcmp(type,mng_pHYg,4) == 0)
5173 if (mng_info->phyg_warning == 0)
5174 (void) ThrowMagickException(&image->exception,GetMagickModule(),
5175 CoderError,"pHYg is not implemented.","`%s'",image->filename);
5177 mng_info->phyg_warning++;
5179 if (memcmp(type,mng_BASI,4) == 0)
5181 skip_to_iend=MagickTrue;
5183 if (mng_info->basi_warning == 0)
5184 (void) ThrowMagickException(&image->exception,GetMagickModule(),
5185 CoderError,"BASI is not implemented yet","`%s'",
5188 mng_info->basi_warning++;
5189 #ifdef MNG_BASI_SUPPORTED
5190 basi_width=(size_t) ((p[0] << 24) | (p[1] << 16) |
5191 (p[2] << 8) | p[3]);
5192 basi_height=(size_t) ((p[4] << 24) | (p[5] << 16) |
5193 (p[6] << 8) | p[7]);
5194 basi_color_type=p[8];
5195 basi_compression_method=p[9];
5196 basi_filter_type=p[10];
5197 basi_interlace_method=p[11];
5199 basi_red=(p[12] << 8) & p[13];
5205 basi_green=(p[14] << 8) & p[15];
5211 basi_blue=(p[16] << 8) & p[17];
5217 basi_alpha=(p[18] << 8) & p[19];
5221 if (basi_sample_depth == 16)
5228 basi_viewable=p[20];
5234 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
5238 if (memcmp(type,mng_IHDR,4)
5239 #if defined(JNG_SUPPORTED)
5240 && memcmp(type,mng_JHDR,4)
5244 /* Not an IHDR or JHDR chunk */
5246 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
5251 if (logging != MagickFalse)
5252 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5253 " Processing %c%c%c%c chunk",type[0],type[1],type[2],type[3]);
5255 mng_info->exists[object_id]=MagickTrue;
5256 mng_info->viewable[object_id]=MagickTrue;
5258 if (mng_info->invisible[object_id])
5260 if (logging != MagickFalse)
5261 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5262 " Skipping invisible object");
5264 skip_to_iend=MagickTrue;
5265 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
5268 #if defined(MNG_INSERT_LAYERS)
5270 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
5272 image_width=(size_t) mng_get_long(p);
5273 image_height=(size_t) mng_get_long(&p[4]);
5275 chunk=(unsigned char *) RelinquishMagickMemory(chunk);
5278 Insert a transparent background layer behind the entire animation
5279 if it is not full screen.
5281 #if defined(MNG_INSERT_LAYERS)
5282 if (insert_layers && mng_type && first_mng_object)
5284 if ((mng_info->clip.left > 0) || (mng_info->clip.top > 0) ||
5285 (image_width < mng_info->mng_width) ||
5286 (mng_info->clip.right < (ssize_t) mng_info->mng_width) ||
5287 (image_height < mng_info->mng_height) ||
5288 (mng_info->clip.bottom < (ssize_t) mng_info->mng_height))
5290 if (GetAuthenticPixelQueue(image) != (PixelPacket *) NULL)
5293 Allocate next image structure.
5295 AcquireNextImage(image_info,image);
5297 if (GetNextImageInList(image) == (Image *) NULL)
5299 image=DestroyImageList(image);
5300 MngInfoFreeStruct(mng_info,&have_mng_structure);
5301 return((Image *) NULL);
5304 image=SyncNextImageInList(image);
5306 mng_info->image=image;
5308 if (term_chunk_found)
5310 image->start_loop=MagickTrue;
5311 image->iterations=mng_iterations;
5312 term_chunk_found=MagickFalse;
5316 image->start_loop=MagickFalse;
5318 /* Make a background rectangle. */
5321 image->columns=mng_info->mng_width;
5322 image->rows=mng_info->mng_height;
5323 image->page.width=mng_info->mng_width;
5324 image->page.height=mng_info->mng_height;
5327 image->background_color=mng_background_color;
5328 (void) SetImageBackgroundColor(image);
5329 if (logging != MagickFalse)
5330 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5331 " Inserted transparent background layer, W=%.20g, H=%.20g",
5332 (double) mng_info->mng_width,(double) mng_info->mng_height);
5336 Insert a background layer behind the upcoming image if
5337 framing_mode is 3, and we haven't already inserted one.
5339 if (insert_layers && (mng_info->framing_mode == 3) &&
5340 (subframe_width) && (subframe_height) && (simplicity == 0 ||
5341 (simplicity & 0x08)))
5343 if (GetAuthenticPixelQueue(image) != (PixelPacket *) NULL)
5346 Allocate next image structure.
5348 AcquireNextImage(image_info,image);
5350 if (GetNextImageInList(image) == (Image *) NULL)
5352 image=DestroyImageList(image);
5353 MngInfoFreeStruct(mng_info,&have_mng_structure);
5354 return((Image *) NULL);
5357 image=SyncNextImageInList(image);
5360 mng_info->image=image;
5362 if (term_chunk_found)
5364 image->start_loop=MagickTrue;
5365 image->iterations=mng_iterations;
5366 term_chunk_found=MagickFalse;
5370 image->start_loop=MagickFalse;
5373 image->columns=subframe_width;
5374 image->rows=subframe_height;
5375 image->page.width=subframe_width;
5376 image->page.height=subframe_height;
5377 image->page.x=mng_info->clip.left;
5378 image->page.y=mng_info->clip.top;
5379 image->background_color=mng_background_color;
5380 image->matte=MagickFalse;
5381 (void) SetImageBackgroundColor(image);
5383 if (logging != MagickFalse)
5384 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5385 " Insert background layer, L=%.20g, R=%.20g T=%.20g, B=%.20g",
5386 (double) mng_info->clip.left,(double) mng_info->clip.right,
5387 (double) mng_info->clip.top,(double) mng_info->clip.bottom);
5389 #endif /* MNG_INSERT_LAYERS */
5390 first_mng_object=MagickFalse;
5392 if (GetAuthenticPixelQueue(image) != (PixelPacket *) NULL)
5395 Allocate next image structure.
5397 AcquireNextImage(image_info,image);
5399 if (GetNextImageInList(image) == (Image *) NULL)
5401 image=DestroyImageList(image);
5402 MngInfoFreeStruct(mng_info,&have_mng_structure);
5403 return((Image *) NULL);
5406 image=SyncNextImageInList(image);
5408 mng_info->image=image;
5409 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
5410 GetBlobSize(image));
5412 if (status == MagickFalse)
5415 if (term_chunk_found)
5417 image->start_loop=MagickTrue;
5418 term_chunk_found=MagickFalse;
5422 image->start_loop=MagickFalse;
5424 if (mng_info->framing_mode == 1 || mng_info->framing_mode == 3)
5426 image->delay=frame_delay;
5427 frame_delay=default_frame_delay;
5433 image->page.width=mng_info->mng_width;
5434 image->page.height=mng_info->mng_height;
5435 image->page.x=mng_info->x_off[object_id];
5436 image->page.y=mng_info->y_off[object_id];
5437 image->iterations=mng_iterations;
5440 Seek back to the beginning of the IHDR or JHDR chunk's length field.
5443 if (logging != MagickFalse)
5444 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5445 " Seeking back to beginning of %c%c%c%c chunk",type[0],type[1],
5448 offset=SeekBlob(image,-((ssize_t) length+12),SEEK_CUR);
5451 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
5455 mng_info->image=image;
5456 mng_info->mng_type=mng_type;
5457 mng_info->object_id=object_id;
5459 if (memcmp(type,mng_IHDR,4) == 0)
5460 image=ReadOnePNGImage(mng_info,image_info,exception);
5462 #if defined(JNG_SUPPORTED)
5464 image=ReadOneJNGImage(mng_info,image_info,exception);
5467 if (image == (Image *) NULL)
5469 if (IsImageObject(previous) != MagickFalse)
5471 (void) DestroyImageList(previous);
5472 (void) CloseBlob(previous);
5475 MngInfoFreeStruct(mng_info,&have_mng_structure);
5476 return((Image *) NULL);
5479 if (image->columns == 0 || image->rows == 0)
5481 (void) CloseBlob(image);
5482 image=DestroyImageList(image);
5483 MngInfoFreeStruct(mng_info,&have_mng_structure);
5484 return((Image *) NULL);
5487 mng_info->image=image;
5494 if (mng_info->magn_methx || mng_info->magn_methy)
5500 if (logging != MagickFalse)
5501 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5502 " Processing MNG MAGN chunk");
5504 if (mng_info->magn_methx == 1)
5506 magnified_width=mng_info->magn_ml;
5508 if (image->columns > 1)
5509 magnified_width += mng_info->magn_mr;
5511 if (image->columns > 2)
5512 magnified_width += (png_uint_32)
5513 ((image->columns-2)*(mng_info->magn_mx));
5518 magnified_width=(png_uint_32) image->columns;
5520 if (image->columns > 1)
5521 magnified_width += mng_info->magn_ml-1;
5523 if (image->columns > 2)
5524 magnified_width += mng_info->magn_mr-1;
5526 if (image->columns > 3)
5527 magnified_width += (png_uint_32)
5528 ((image->columns-3)*(mng_info->magn_mx-1));
5531 if (mng_info->magn_methy == 1)
5533 magnified_height=mng_info->magn_mt;
5535 if (image->rows > 1)
5536 magnified_height += mng_info->magn_mb;
5538 if (image->rows > 2)
5539 magnified_height += (png_uint_32)
5540 ((image->rows-2)*(mng_info->magn_my));
5545 magnified_height=(png_uint_32) image->rows;
5547 if (image->rows > 1)
5548 magnified_height += mng_info->magn_mt-1;
5550 if (image->rows > 2)
5551 magnified_height += mng_info->magn_mb-1;
5553 if (image->rows > 3)
5554 magnified_height += (png_uint_32)
5555 ((image->rows-3)*(mng_info->magn_my-1));
5558 if (magnified_height > image->rows ||
5559 magnified_width > image->columns)
5574 register PixelPacket
5586 /* Allocate next image structure. */
5588 if (logging != MagickFalse)
5589 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5590 " Allocate magnified image");
5592 AcquireNextImage(image_info,image);
5594 if (GetNextImageInList(image) == (Image *) NULL)
5596 image=DestroyImageList(image);
5597 MngInfoFreeStruct(mng_info,&have_mng_structure);
5598 return((Image *) NULL);
5601 large_image=SyncNextImageInList(image);
5603 large_image->columns=magnified_width;
5604 large_image->rows=magnified_height;
5606 magn_methx=mng_info->magn_methx;
5607 magn_methy=mng_info->magn_methy;
5609 #if (MAGICKCORE_QUANTUM_DEPTH == 32)
5610 #define QM unsigned short
5611 if (magn_methx != 1 || magn_methy != 1)
5614 Scale pixels to unsigned shorts to prevent
5615 overflow of intermediate values of interpolations
5617 for (y=0; y < (ssize_t) image->rows; y++)
5619 q=GetAuthenticPixels(image,0,y,image->columns,1,
5622 for (x=(ssize_t) image->columns-1; x >= 0; x--)
5624 q->red=ScaleQuantumToShort(q->red);
5625 q->green=ScaleQuantumToShort(q->green);
5626 q->blue=ScaleQuantumToShort(q->blue);
5627 q->opacity=ScaleQuantumToShort(q->opacity);
5631 if (SyncAuthenticPixels(image,exception) == MagickFalse)
5639 if (image->matte != MagickFalse)
5640 (void) SetImageBackgroundColor(large_image);
5644 large_image->background_color.opacity=OpaqueOpacity;
5645 (void) SetImageBackgroundColor(large_image);
5647 if (magn_methx == 4)
5650 if (magn_methx == 5)
5653 if (magn_methy == 4)
5656 if (magn_methy == 5)
5660 /* magnify the rows into the right side of the large image */
5662 if (logging != MagickFalse)
5663 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5664 " Magnify the rows to %.20g",(double) large_image->rows);
5665 m=(ssize_t) mng_info->magn_mt;
5667 length=(size_t) image->columns;
5668 next=(PixelPacket *) AcquireQuantumMemory(length,sizeof(*next));
5669 prev=(PixelPacket *) AcquireQuantumMemory(length,sizeof(*prev));
5671 if ((prev == (PixelPacket *) NULL) ||
5672 (next == (PixelPacket *) NULL))
5674 image=DestroyImageList(image);
5675 MngInfoFreeStruct(mng_info,&have_mng_structure);
5676 ThrowReaderException(ResourceLimitError,
5677 "MemoryAllocationFailed");
5680 n=GetAuthenticPixels(image,0,0,image->columns,1,exception);
5681 (void) CopyMagickMemory(next,n,length);
5683 for (y=0; y < (ssize_t) image->rows; y++)
5686 m=(ssize_t) mng_info->magn_mt;
5688 else if (magn_methy > 1 && y == (ssize_t) image->rows-2)
5689 m=(ssize_t) mng_info->magn_mb;
5691 else if (magn_methy <= 1 && y == (ssize_t) image->rows-1)
5692 m=(ssize_t) mng_info->magn_mb;
5694 else if (magn_methy > 1 && y == (ssize_t) image->rows-1)
5698 m=(ssize_t) mng_info->magn_my;
5704 if (y < (ssize_t) image->rows-1)
5706 n=GetAuthenticPixels(image,0,y+1,image->columns,1,
5708 (void) CopyMagickMemory(next,n,length);
5711 for (i=0; i < m; i++, yy++)
5713 register PixelPacket
5716 assert(yy < (ssize_t) large_image->rows);
5719 q=GetAuthenticPixels(large_image,0,yy,large_image->columns,
5721 q+=(large_image->columns-image->columns);
5723 for (x=(ssize_t) image->columns-1; x >= 0; x--)
5725 /* To do: get color as function of indexes[x] */
5727 if (image->storage_class == PseudoClass)
5732 if (magn_methy <= 1)
5734 *q=(*pixels); /* replicate previous */
5737 else if (magn_methy == 2 || magn_methy == 4)
5745 (*q).red=(QM) (((ssize_t) (2*i*((*n).red
5746 -(*pixels).red)+m))/((ssize_t) (m*2))
5748 (*q).green=(QM) (((ssize_t) (2*i*((*n).green
5749 -(*pixels).green)+m))/((ssize_t) (m*2))
5751 (*q).blue=(QM) (((ssize_t) (2*i*((*n).blue
5752 -(*pixels).blue)+m))/((ssize_t) (m*2))
5755 if (image->matte != MagickFalse)
5756 (*q).opacity=(QM) (((ssize_t)
5758 -(*pixels).opacity)+m))
5759 /((ssize_t) (m*2))+(*pixels).opacity);
5762 if (magn_methy == 4)
5764 /* Replicate nearest */
5765 if (i <= ((m+1) << 1))
5766 (*q).opacity=(*pixels).opacity+0;
5768 (*q).opacity=(*n).opacity+0;
5772 else /* if (magn_methy == 3 || magn_methy == 5) */
5774 /* Replicate nearest */
5775 if (i <= ((m+1) << 1))
5781 if (magn_methy == 5)
5783 (*q).opacity=(QM) (((ssize_t) (2*i*((*n).opacity
5784 -(*pixels).opacity)+m))/((ssize_t) (m*2))
5785 +(*pixels).opacity);
5793 if (SyncAuthenticPixels(large_image,exception) == 0)
5799 prev=(PixelPacket *) RelinquishMagickMemory(prev);
5800 next=(PixelPacket *) RelinquishMagickMemory(next);
5802 length=image->columns;
5804 if (logging != MagickFalse)
5805 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5806 " Delete original image");
5808 DeleteImageFromList(&image);
5812 mng_info->image=image;
5814 /* magnify the columns */
5815 if (logging != MagickFalse)
5816 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5817 " Magnify the columns to %.20g",(double) image->columns);
5819 for (y=0; y < (ssize_t) image->rows; y++)
5821 register PixelPacket
5824 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
5825 pixels=q+(image->columns-length);
5828 for (x=(ssize_t) (image->columns-length);
5829 x < (ssize_t) image->columns; x++)
5831 if (x == (ssize_t) (image->columns-length))
5832 m=(ssize_t) mng_info->magn_ml;
5834 else if (magn_methx > 1 && x == (ssize_t) image->columns-2)
5835 m=(ssize_t) mng_info->magn_mr;
5837 else if (magn_methx <= 1 && x == (ssize_t) image->columns-1)
5838 m=(ssize_t) mng_info->magn_mr;
5840 else if (magn_methx > 1 && x == (ssize_t) image->columns-1)
5844 m=(ssize_t) mng_info->magn_mx;
5846 for (i=0; i < m; i++)
5848 if (magn_methx <= 1)
5850 /* replicate previous */
5854 else if (magn_methx == 2 || magn_methx == 4)
5862 (*q).red=(QM) ((2*i*((*n).red
5864 /((ssize_t) (m*2))+(*pixels).red);
5865 (*q).green=(QM) ((2*i*((*n).green
5867 +m)/((ssize_t) (m*2))+(*pixels).green);
5868 (*q).blue=(QM) ((2*i*((*n).blue
5870 /((ssize_t) (m*2))+(*pixels).blue);
5871 if (image->matte != MagickFalse)
5872 (*q).opacity=(QM) ((2*i*((*n).opacity
5873 -(*pixels).opacity)+m)/((ssize_t) (m*2))
5874 +(*pixels).opacity);
5877 if (magn_methx == 4)
5879 /* Replicate nearest */
5880 if (i <= ((m+1) << 1))
5881 (*q).opacity=(*pixels).opacity+0;
5883 (*q).opacity=(*n).opacity+0;
5887 else /* if (magn_methx == 3 || magn_methx == 5) */
5889 /* Replicate nearest */
5890 if (i <= ((m+1) << 1))
5896 if (magn_methx == 5)
5899 (*q).opacity=(QM) ((2*i*((*n).opacity
5900 -(*pixels).opacity)+m) /((ssize_t) (m*2))
5901 +(*pixels).opacity);
5910 if (SyncAuthenticPixels(image,exception) == MagickFalse)
5913 #if (MAGICKCORE_QUANTUM_DEPTH == 32)
5914 if (magn_methx != 1 || magn_methy != 1)
5917 Rescale pixels to Quantum
5919 for (y=0; y < (ssize_t) image->rows; y++)
5921 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
5923 for (x=(ssize_t) image->columns-1; x >= 0; x--)
5925 q->red=ScaleShortToQuantum(q->red);
5926 q->green=ScaleShortToQuantum(q->green);
5927 q->blue=ScaleShortToQuantum(q->blue);
5928 q->opacity=ScaleShortToQuantum(q->opacity);
5932 if (SyncAuthenticPixels(image,exception) == MagickFalse)
5937 if (logging != MagickFalse)
5938 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5939 " Finished MAGN processing");
5944 Crop_box is with respect to the upper left corner of the MNG.
5946 crop_box.left=mng_info->image_box.left+mng_info->x_off[object_id];
5947 crop_box.right=mng_info->image_box.right+mng_info->x_off[object_id];
5948 crop_box.top=mng_info->image_box.top+mng_info->y_off[object_id];
5949 crop_box.bottom=mng_info->image_box.bottom+mng_info->y_off[object_id];
5950 crop_box=mng_minimum_box(crop_box,mng_info->clip);
5951 crop_box=mng_minimum_box(crop_box,mng_info->frame);
5952 crop_box=mng_minimum_box(crop_box,mng_info->object_clip[object_id]);
5953 if ((crop_box.left != (mng_info->image_box.left
5954 +mng_info->x_off[object_id])) ||
5955 (crop_box.right != (mng_info->image_box.right
5956 +mng_info->x_off[object_id])) ||
5957 (crop_box.top != (mng_info->image_box.top
5958 +mng_info->y_off[object_id])) ||
5959 (crop_box.bottom != (mng_info->image_box.bottom
5960 +mng_info->y_off[object_id])))
5962 if (logging != MagickFalse)
5963 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
5964 " Crop the PNG image");
5966 if ((crop_box.left < crop_box.right) &&
5967 (crop_box.top < crop_box.bottom))
5976 Crop_info is with respect to the upper left corner of
5979 crop_info.x=(crop_box.left-mng_info->x_off[object_id]);
5980 crop_info.y=(crop_box.top-mng_info->y_off[object_id]);
5981 crop_info.width=(size_t) (crop_box.right-crop_box.left);
5982 crop_info.height=(size_t) (crop_box.bottom-crop_box.top);
5983 image->page.width=image->columns;
5984 image->page.height=image->rows;
5987 im=CropImage(image,&crop_info,exception);
5989 if (im != (Image *) NULL)
5991 image->columns=im->columns;
5992 image->rows=im->rows;
5993 im=DestroyImage(im);
5994 image->page.width=image->columns;
5995 image->page.height=image->rows;
5996 image->page.x=crop_box.left;
5997 image->page.y=crop_box.top;
6004 No pixels in crop area. The MNG spec still requires
6005 a layer, though, so make a single transparent pixel in
6006 the top left corner.
6011 (void) SetImageBackgroundColor(image);
6012 image->page.width=1;
6013 image->page.height=1;
6018 #ifndef PNG_READ_EMPTY_PLTE_SUPPORTED
6019 image=mng_info->image;
6023 #if (MAGICKCORE_QUANTUM_DEPTH > 16)
6024 /* PNG does not handle depths greater than 16 so reduce it even
6027 if (image->depth > 16)
6031 #if (MAGICKCORE_QUANTUM_DEPTH >= 16)
6032 if (LosslessReduceDepthOK(image) != MagickFalse)
6036 GetImageException(image,exception);
6038 if (image_info->number_scenes != 0)
6040 if (mng_info->scenes_found >
6041 (ssize_t) (image_info->first_scene+image_info->number_scenes))
6045 if (logging != MagickFalse)
6046 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6047 " Finished reading image datastream.");
6049 } while (LocaleCompare(image_info->magick,"MNG") == 0);
6051 (void) CloseBlob(image);
6053 if (logging != MagickFalse)
6054 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6055 " Finished reading all image datastreams.");
6057 #if defined(MNG_INSERT_LAYERS)
6058 if (insert_layers && !mng_info->image_found && (mng_info->mng_width) &&
6059 (mng_info->mng_height))
6062 Insert a background layer if nothing else was found.
6064 if (logging != MagickFalse)
6065 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6066 " No images found. Inserting a background layer.");
6068 if (GetAuthenticPixelQueue(image) != (PixelPacket *) NULL)
6071 Allocate next image structure.
6073 AcquireNextImage(image_info,image);
6074 if (GetNextImageInList(image) == (Image *) NULL)
6076 image=DestroyImageList(image);
6077 MngInfoFreeStruct(mng_info,&have_mng_structure);
6079 if (logging != MagickFalse)
6080 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6081 " Allocation failed, returning NULL.");
6083 return((Image *) NULL);
6085 image=SyncNextImageInList(image);
6087 image->columns=mng_info->mng_width;
6088 image->rows=mng_info->mng_height;
6089 image->page.width=mng_info->mng_width;
6090 image->page.height=mng_info->mng_height;
6093 image->background_color=mng_background_color;
6094 image->matte=MagickFalse;
6096 if (image_info->ping == MagickFalse)
6097 (void) SetImageBackgroundColor(image);
6099 mng_info->image_found++;
6102 image->iterations=mng_iterations;
6104 if (mng_iterations == 1)
6105 image->start_loop=MagickTrue;
6107 while (GetPreviousImageInList(image) != (Image *) NULL)
6110 if (image_count > 10*mng_info->image_found)
6112 if (logging != MagickFalse)
6113 (void) LogMagickEvent(CoderEvent,GetMagickModule()," No beginning");
6115 (void) ThrowMagickException(&image->exception,GetMagickModule(),
6116 CoderError,"Linked list is corrupted, beginning of list not found",
6117 "`%s'",image_info->filename);
6119 return((Image *) NULL);
6122 image=GetPreviousImageInList(image);
6124 if (GetNextImageInList(image) == (Image *) NULL)
6126 if (logging != MagickFalse)
6127 (void) LogMagickEvent(CoderEvent,GetMagickModule()," Corrupt list");
6129 (void) ThrowMagickException(&image->exception,GetMagickModule(),
6130 CoderError,"Linked list is corrupted; next_image is NULL","`%s'",
6131 image_info->filename);
6135 if (mng_info->ticks_per_second && mng_info->image_found > 1 &&
6136 GetNextImageInList(image) ==
6139 if (logging != MagickFalse)
6140 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6141 " First image null");
6143 (void) ThrowMagickException(&image->exception,GetMagickModule(),
6144 CoderError,"image->next for first image is NULL but shouldn't be.",
6145 "`%s'",image_info->filename);
6148 if (mng_info->image_found == 0)
6150 if (logging != MagickFalse)
6151 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6152 " No visible images found.");
6154 (void) ThrowMagickException(&image->exception,GetMagickModule(),
6155 CoderError,"No visible images in file","`%s'",image_info->filename);
6157 if (image != (Image *) NULL)
6158 image=DestroyImageList(image);
6160 MngInfoFreeStruct(mng_info,&have_mng_structure);
6161 return((Image *) NULL);
6164 if (mng_info->ticks_per_second)
6165 final_delay=1UL*MagickMax(image->ticks_per_second,1L)*
6166 final_delay/mng_info->ticks_per_second;
6169 image->start_loop=MagickTrue;
6171 /* Find final nonzero image delay */
6172 final_image_delay=0;
6174 while (GetNextImageInList(image) != (Image *) NULL)
6177 final_image_delay=image->delay;
6179 image=GetNextImageInList(image);
6182 if (final_delay < final_image_delay)
6183 final_delay=final_image_delay;
6185 image->delay=final_delay;
6187 if (logging != MagickFalse)
6188 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6189 " image->delay=%.20g, final_delay=%.20g",(double) image->delay,
6190 (double) final_delay);
6192 if (logging != MagickFalse)
6198 image=GetFirstImageInList(image);
6200 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6201 " Before coalesce:");
6203 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6204 " scene 0 delay=%.20g",(double) image->delay);
6206 while (GetNextImageInList(image) != (Image *) NULL)
6208 image=GetNextImageInList(image);
6209 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6210 " scene %.20g delay=%.20g",(double) scene++,(double) image->delay);
6214 image=GetFirstImageInList(image);
6215 #ifdef MNG_COALESCE_LAYERS
6225 if (logging != MagickFalse)
6226 (void) LogMagickEvent(CoderEvent,GetMagickModule()," Coalesce Images");
6229 next_image=CoalesceImages(image,&image->exception);
6231 if (next_image == (Image *) NULL)
6232 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
6234 image=DestroyImageList(image);
6237 for (next=image; next != (Image *) NULL; next=next_image)
6239 next->page.width=mng_info->mng_width;
6240 next->page.height=mng_info->mng_height;
6243 next->scene=scene++;
6244 next_image=GetNextImageInList(next);
6246 if (next_image == (Image *) NULL)
6249 if (next->delay == 0)
6252 next_image->previous=GetPreviousImageInList(next);
6253 if (GetPreviousImageInList(next) == (Image *) NULL)
6256 next->previous->next=next_image;
6257 next=DestroyImage(next);
6263 while (GetNextImageInList(image) != (Image *) NULL)
6264 image=GetNextImageInList(image);
6266 image->dispose=BackgroundDispose;
6268 if (logging != MagickFalse)
6274 image=GetFirstImageInList(image);
6276 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6277 " After coalesce:");
6279 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6280 " scene 0 delay=%.20g dispose=%.20g",(double) image->delay,
6281 (double) image->dispose);
6283 while (GetNextImageInList(image) != (Image *) NULL)
6285 image=GetNextImageInList(image);
6287 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6288 " scene %.20g delay=%.20g dispose=%.20g",(double) scene++,
6289 (double) image->delay,(double) image->dispose);
6293 image=GetFirstImageInList(image);
6294 MngInfoFreeStruct(mng_info,&have_mng_structure);
6295 have_mng_structure=MagickFalse;
6297 if (logging != MagickFalse)
6298 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"exit ReadMNGImage()");
6300 return(GetFirstImageInList(image));
6302 #else /* PNG_LIBPNG_VER > 10011 */
6303 static Image *ReadPNGImage(const ImageInfo *image_info,ExceptionInfo *exception)
6305 printf("Your PNG library is too old: You have libpng-%s\n",
6306 PNG_LIBPNG_VER_STRING);
6308 (void) ThrowMagickException(exception,GetMagickModule(),CoderError,
6309 "PNG library is too old","`%s'",image_info->filename);
6311 return(Image *) NULL;
6314 static Image *ReadMNGImage(const ImageInfo *image_info,ExceptionInfo *exception)
6316 return(ReadPNGImage(image_info,exception));
6318 #endif /* PNG_LIBPNG_VER > 10011 */
6322 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6326 % R e g i s t e r P N G I m a g e %
6330 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6332 % RegisterPNGImage() adds properties for the PNG image format to
6333 % the list of supported formats. The properties include the image format
6334 % tag, a method to read and/or write the format, whether the format
6335 % supports the saving of more than one frame to the same file or blob,
6336 % whether the format supports native in-memory I/O, and a brief
6337 % description of the format.
6339 % The format of the RegisterPNGImage method is:
6341 % size_t RegisterPNGImage(void)
6344 ModuleExport size_t RegisterPNGImage(void)
6347 version[MaxTextExtent];
6355 "See http://www.libpng.org/ for details about the PNG format."
6360 "See http://www.libpng.org/pub/mng/ for details about the JNG\n"
6366 "See http://www.libpng.org/pub/mng/ for details about the MNG\n"
6372 #if defined(PNG_LIBPNG_VER_STRING)
6373 (void) ConcatenateMagickString(version,"libpng ",MaxTextExtent);
6374 (void) ConcatenateMagickString(version,PNG_LIBPNG_VER_STRING,MaxTextExtent);
6376 if (LocaleCompare(PNG_LIBPNG_VER_STRING,png_get_header_ver(NULL)) != 0)
6378 (void) ConcatenateMagickString(version,",",MaxTextExtent);
6379 (void) ConcatenateMagickString(version,png_get_libpng_ver(NULL),
6384 entry=SetMagickInfo("MNG");
6385 entry->seekable_stream=MagickTrue; /* To do: eliminate this. */
6387 #if defined(MAGICKCORE_PNG_DELEGATE)
6388 entry->decoder=(DecodeImageHandler *) ReadMNGImage;
6389 entry->encoder=(EncodeImageHandler *) WriteMNGImage;
6392 entry->magick=(IsImageFormatHandler *) IsMNG;
6393 entry->description=ConstantString("Multiple-image Network Graphics");
6395 if (*version != '\0')
6396 entry->version=ConstantString(version);
6398 entry->module=ConstantString("PNG");
6399 entry->note=ConstantString(MNGNote);
6400 (void) RegisterMagickInfo(entry);
6402 entry=SetMagickInfo("PNG");
6404 #if defined(MAGICKCORE_PNG_DELEGATE)
6405 entry->decoder=(DecodeImageHandler *) ReadPNGImage;
6406 entry->encoder=(EncodeImageHandler *) WritePNGImage;
6409 entry->magick=(IsImageFormatHandler *) IsPNG;
6410 entry->adjoin=MagickFalse;
6411 entry->description=ConstantString("Portable Network Graphics");
6412 entry->module=ConstantString("PNG");
6414 if (*version != '\0')
6415 entry->version=ConstantString(version);
6417 entry->note=ConstantString(PNGNote);
6418 (void) RegisterMagickInfo(entry);
6420 entry=SetMagickInfo("PNG8");
6422 #if defined(MAGICKCORE_PNG_DELEGATE)
6423 entry->decoder=(DecodeImageHandler *) ReadPNGImage;
6424 entry->encoder=(EncodeImageHandler *) WritePNGImage;
6427 entry->magick=(IsImageFormatHandler *) IsPNG;
6428 entry->adjoin=MagickFalse;
6429 entry->description=ConstantString(
6430 "8-bit indexed with optional binary transparency");
6431 entry->module=ConstantString("PNG");
6432 (void) RegisterMagickInfo(entry);
6434 entry=SetMagickInfo("PNG24");
6437 #if defined(ZLIB_VERSION)
6438 (void) ConcatenateMagickString(version,"zlib ",MaxTextExtent);
6439 (void) ConcatenateMagickString(version,ZLIB_VERSION,MaxTextExtent);
6441 if (LocaleCompare(ZLIB_VERSION,zlib_version) != 0)
6443 (void) ConcatenateMagickString(version,",",MaxTextExtent);
6444 (void) ConcatenateMagickString(version,zlib_version,MaxTextExtent);
6448 if (*version != '\0')
6449 entry->version=ConstantString(version);
6451 #if defined(MAGICKCORE_PNG_DELEGATE)
6452 entry->decoder=(DecodeImageHandler *) ReadPNGImage;
6453 entry->encoder=(EncodeImageHandler *) WritePNGImage;
6456 entry->magick=(IsImageFormatHandler *) IsPNG;
6457 entry->adjoin=MagickFalse;
6458 entry->description=ConstantString("opaque 24-bit RGB");
6459 entry->module=ConstantString("PNG");
6460 (void) RegisterMagickInfo(entry);
6462 entry=SetMagickInfo("PNG32");
6464 #if defined(MAGICKCORE_PNG_DELEGATE)
6465 entry->decoder=(DecodeImageHandler *) ReadPNGImage;
6466 entry->encoder=(EncodeImageHandler *) WritePNGImage;
6469 entry->magick=(IsImageFormatHandler *) IsPNG;
6470 entry->adjoin=MagickFalse;
6471 entry->description=ConstantString("opaque or transparent 32-bit RGBA");
6472 entry->module=ConstantString("PNG");
6473 (void) RegisterMagickInfo(entry);
6475 entry=SetMagickInfo("JNG");
6477 #if defined(JNG_SUPPORTED)
6478 #if defined(MAGICKCORE_PNG_DELEGATE)
6479 entry->decoder=(DecodeImageHandler *) ReadJNGImage;
6480 entry->encoder=(EncodeImageHandler *) WriteJNGImage;
6484 entry->magick=(IsImageFormatHandler *) IsJNG;
6485 entry->adjoin=MagickFalse;
6486 entry->description=ConstantString("JPEG Network Graphics");
6487 entry->module=ConstantString("PNG");
6488 entry->note=ConstantString(JNGNote);
6489 (void) RegisterMagickInfo(entry);
6491 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
6492 ping_semaphore=AllocateSemaphoreInfo();
6495 return(MagickImageCoderSignature);
6499 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6503 % U n r e g i s t e r P N G I m a g e %
6507 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6509 % UnregisterPNGImage() removes format registrations made by the
6510 % PNG module from the list of supported formats.
6512 % The format of the UnregisterPNGImage method is:
6514 % UnregisterPNGImage(void)
6517 ModuleExport void UnregisterPNGImage(void)
6519 (void) UnregisterMagickInfo("MNG");
6520 (void) UnregisterMagickInfo("PNG");
6521 (void) UnregisterMagickInfo("PNG8");
6522 (void) UnregisterMagickInfo("PNG24");
6523 (void) UnregisterMagickInfo("PNG32");
6524 (void) UnregisterMagickInfo("JNG");
6526 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
6527 if (ping_semaphore != (SemaphoreInfo *) NULL)
6528 DestroySemaphoreInfo(&ping_semaphore);
6532 #if defined(MAGICKCORE_PNG_DELEGATE)
6533 #if PNG_LIBPNG_VER > 10011
6535 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6539 % W r i t e M N G I m a g e %
6543 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6545 % WriteMNGImage() writes an image in the Portable Network Graphics
6546 % Group's "Multiple-image Network Graphics" encoded image format.
6548 % MNG support written by Glenn Randers-Pehrson, glennrp@image...
6550 % The format of the WriteMNGImage method is:
6552 % MagickBooleanType WriteMNGImage(const ImageInfo *image_info,Image *image)
6554 % A description of each parameter follows.
6556 % o image_info: the image info.
6558 % o image: The image.
6561 % To do (as of version 5.5.2, November 26, 2002 -- glennrp -- see also
6562 % "To do" under ReadPNGImage):
6564 % Preserve all unknown and not-yet-handled known chunks found in input
6565 % PNG file and copy them into output PNG files according to the PNG
6568 % Write the iCCP chunk at MNG level when (icc profile length > 0)
6570 % Improve selection of color type (use indexed-colour or indexed-colour
6571 % with tRNS when 256 or fewer unique RGBA values are present).
6573 % Figure out what to do with "dispose=<restore-to-previous>" (dispose == 3)
6574 % This will be complicated if we limit ourselves to generating MNG-LC
6575 % files. For now we ignore disposal method 3 and simply overlay the next
6578 % Check for identical PLTE's or PLTE/tRNS combinations and use a
6579 % global MNG PLTE or PLTE/tRNS combination when appropriate.
6580 % [mostly done 15 June 1999 but still need to take care of tRNS]
6582 % Check for identical sRGB and replace with a global sRGB (and remove
6583 % gAMA/cHRM if sRGB is found; check for identical gAMA/cHRM and
6584 % replace with global gAMA/cHRM (or with sRGB if appropriate; replace
6585 % local gAMA/cHRM with local sRGB if appropriate).
6587 % Check for identical sBIT chunks and write global ones.
6589 % Provide option to skip writing the signature tEXt chunks.
6591 % Use signatures to detect identical objects and reuse the first
6592 % instance of such objects instead of writing duplicate objects.
6594 % Use a smaller-than-32k value of compression window size when
6597 % Encode JNG datastreams. Mostly done as of 5.5.2; need to write
6598 % ancillary text chunks and save profiles.
6600 % Provide an option to force LC files (to ensure exact framing rate)
6603 % Provide an option to force VLC files instead of LC, even when offsets
6604 % are present. This will involve expanding the embedded images with a
6605 % transparent region at the top and/or left.
6609 Magick_png_write_raw_profile(const ImageInfo *image_info,png_struct *ping,
6610 png_info *ping_info, unsigned char *profile_type, unsigned char
6611 *profile_description, unsigned char *profile_data, png_uint_32 length)
6630 hex[16]={'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
6632 if (LocaleNCompare((char *) profile_type+1, "ng-chunk-",9) == 0)
6635 if (image_info->verbose)
6637 (void) printf("writing raw profile: type=%s, length=%.20g\n",
6638 (char *) profile_type, (double) length);
6641 text=(png_textp) png_malloc(ping,(png_uint_32) sizeof(png_text));
6642 description_length=(png_uint_32) strlen((const char *) profile_description);
6643 allocated_length=(png_uint_32) (length*2 + (length >> 5) + 20
6644 + description_length);
6645 text[0].text=(png_charp) png_malloc(ping,allocated_length);
6646 text[0].key=(png_charp) png_malloc(ping, (png_uint_32) 80);
6647 text[0].key[0]='\0';
6648 (void) ConcatenateMagickString(text[0].key,
6649 "Raw profile type ",MaxTextExtent);
6650 (void) ConcatenateMagickString(text[0].key,(const char *) profile_type,62);
6654 (void) CopyMagickString(dp,(const char *) profile_description,
6656 dp+=description_length;
6658 (void) FormatMagickString(dp,allocated_length-
6659 (png_size_t) (dp-text[0].text),"%8lu ",(unsigned long) length);
6662 for (i=0; i < (ssize_t) length; i++)
6666 *(dp++)=(char) hex[((*sp >> 4) & 0x0f)];
6667 *(dp++)=(char) hex[((*sp++ ) & 0x0f)];
6672 text[0].text_length=(png_size_t) (dp-text[0].text);
6673 text[0].compression=image_info->compression == NoCompression ||
6674 (image_info->compression == UndefinedCompression &&
6675 text[0].text_length < 128) ? -1 : 0;
6677 if (text[0].text_length <= allocated_length)
6678 png_set_text(ping,ping_info,text,1);
6680 png_free(ping,text[0].text);
6681 png_free(ping,text[0].key);
6682 png_free(ping,text);
6685 static MagickBooleanType Magick_png_write_chunk_from_profile(Image *image,
6686 const char *string, MagickBooleanType logging)
6699 ResetImageProfileIterator(image);
6701 for (name=GetNextImageProfile(image); name != (const char *) NULL; )
6703 profile=GetImageProfile(image,name);
6705 if (profile != (const StringInfo *) NULL)
6710 if (LocaleNCompare(name,string,11) == 0)
6712 if (logging != MagickFalse)
6713 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6714 " Found %s profile",name);
6716 ping_profile=CloneStringInfo(profile);
6717 data=GetStringInfoDatum(ping_profile),
6718 length=(png_uint_32) GetStringInfoLength(ping_profile);
6723 (void) WriteBlobMSBULong(image,length-5); /* data length */
6724 (void) WriteBlob(image,length-1,data+1);
6725 (void) WriteBlobMSBULong(image,crc32(0,data+1,(uInt) length-1));
6726 ping_profile=DestroyStringInfo(ping_profile);
6730 name=GetNextImageProfile(image);
6737 /* Write one PNG image */
6738 static MagickBooleanType WriteOnePNGImage(MngInfo *mng_info,
6739 const ImageInfo *IMimage_info,Image *IMimage)
6763 ping_trans_alpha[256];
6791 ping_have_cheap_transparency,
6801 /* ping_exclude_EXIF, */
6804 /* ping_exclude_iTXt, */
6809 /* ping_exclude_tRNS, */
6811 ping_exclude_zCCP, /* hex-encoded iCCP */
6814 ping_need_colortype_warning,
6832 ping_interlace_method,
6833 ping_compression_method,
6850 number_semitransparent,
6852 ping_pHYs_unit_type;
6855 ping_pHYs_x_resolution,
6856 ping_pHYs_y_resolution;
6858 logging=LogMagickEvent(CoderEvent,GetMagickModule(),
6859 " Enter WriteOnePNGImage()");
6861 image = CloneImage(IMimage,0,0,MagickFalse,&IMimage->exception);
6862 image_info=(ImageInfo *) CloneImageInfo(IMimage_info);
6864 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
6865 LockSemaphoreInfo(ping_semaphore);
6868 /* Initialize some stuff */
6871 ping_interlace_method=0,
6872 ping_compression_method=0,
6873 ping_filter_method=0,
6876 ping_background.red = 0;
6877 ping_background.green = 0;
6878 ping_background.blue = 0;
6879 ping_background.gray = 0;
6880 ping_background.index = 0;
6882 ping_trans_color.red=0;
6883 ping_trans_color.green=0;
6884 ping_trans_color.blue=0;
6885 ping_trans_color.gray=0;
6887 ping_pHYs_unit_type = 0;
6888 ping_pHYs_x_resolution = 0;
6889 ping_pHYs_y_resolution = 0;
6891 ping_have_blob=MagickFalse;
6892 ping_have_color=MagickTrue;
6893 ping_have_non_bw=MagickTrue;
6894 ping_have_PLTE=MagickFalse;
6895 ping_have_bKGD=MagickFalse;
6896 ping_have_pHYs=MagickFalse;
6897 ping_have_tRNS=MagickFalse;
6899 ping_exclude_bKGD=mng_info->ping_exclude_bKGD;
6900 ping_exclude_cHRM=mng_info->ping_exclude_cHRM;
6901 /* ping_exclude_EXIF=mng_info->ping_exclude_EXIF; */
6902 ping_exclude_gAMA=mng_info->ping_exclude_gAMA;
6903 ping_exclude_cHRM=mng_info->ping_exclude_cHRM;
6904 ping_exclude_iCCP=mng_info->ping_exclude_iCCP;
6905 /* ping_exclude_iTXt=mng_info->ping_exclude_iTXt; */
6906 ping_exclude_oFFs=mng_info->ping_exclude_oFFs;
6907 ping_exclude_pHYs=mng_info->ping_exclude_pHYs;
6908 ping_exclude_sRGB=mng_info->ping_exclude_sRGB;
6909 ping_exclude_tEXt=mng_info->ping_exclude_tEXt;
6910 /* ping_exclude_tRNS=mng_info->ping_exclude_tRNS; */
6911 ping_exclude_vpAg=mng_info->ping_exclude_vpAg;
6912 ping_exclude_zCCP=mng_info->ping_exclude_zCCP; /* hex-encoded iCCP in zTXt */
6913 ping_exclude_zTXt=mng_info->ping_exclude_zTXt;
6915 ping_need_colortype_warning = MagickFalse;
6918 number_semitransparent = 0;
6919 number_transparent = 0;
6921 if (logging != MagickFalse)
6923 if (image->storage_class == UndefinedClass)
6924 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6925 " storage_class=UndefinedClass");
6926 if (image->storage_class == DirectClass)
6927 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6928 " storage_class=DirectClass");
6929 if (image->storage_class == PseudoClass)
6930 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6931 " storage_class=PseudoClass");
6934 if (image->colorspace != RGBColorspace)
6935 (void) TransformImageColorspace(image,RGBColorspace);
6938 Sometimes we get PseudoClass images whose RGB values don't match
6939 the colors in the colormap. This code syncs the RGB values.
6941 if (image->depth <= 8 && image->taint && image->storage_class == PseudoClass)
6942 (void) SyncImage(image);
6944 #if (MAGICKCORE_QUANTUM_DEPTH == 8)
6945 if (image->depth > 8)
6947 if (logging != MagickFalse)
6948 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
6949 " Reducing PNG bit depth to 8 since this is a Q8 build.");
6956 #if (MAGICKCORE_QUANTUM_DEPTH > 16)
6957 /* PNG does not handle depths greater than 16 so reduce it even
6960 if (image->depth > 16)
6964 #if (MAGICKCORE_QUANTUM_DEPTH >= 16)
6965 if (image->depth == 16 && mng_info->write_png_depth != 16)
6966 if (mng_info->write_png8 || LosslessReduceDepthOK(image) != MagickFalse)
6970 /* Normally we run this just once, but in the case of writing PNG8
6971 * we reduce the transparency to binary and run again, then reduce
6972 * the colors to a simple 3-3-2 palette and run once more.
6978 * Sometimes we get DirectClass images that have 256 colors or fewer.
6979 * This code will build a colormap.
6981 * Also, sometimes we get PseudoClass images with an out-of-date
6982 * colormap. This code will replace the colormap with a new one.
6983 * Sometimes we get PseudoClass images that have more than 256 colors.
6984 * This code will delete the colormap and change the image to
6987 * If image->matte is MagickFalse, we ignore the opacity channel
6988 * even though it sometimes contains left-over non-opaque values.
6990 * Also we gather some information (number of opaque, transparent,
6991 * and semitransparent pixels, and whether the image has any non-gray
6992 * pixels or only black-and-white pixels) that we might need later.
6994 * Even if the user wants to force GrayAlpha or RGBA (colortype 4 or 6)
6995 * we need to check for bogus non-opaque values, at least.
6998 #if (MAGICKCORE_QUANTUM_DEPTH == 8)
6999 # define PNGK 0 /* Shift */
7000 # define PNGM 1 /* Scale */
7001 #elif (MAGICKCORE_QUANTUM_DEPTH == 16)
7003 # define PNGM 0x0101
7006 # define PNGM 0x01010101
7017 semitransparent[260],
7020 register IndexPacket
7023 register const PixelPacket
7027 register PixelPacket
7030 if (logging != MagickFalse)
7031 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7032 " Enter BUILD_PALETTE:");
7034 if (logging != MagickFalse)
7036 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7037 " image->columns=%.20g",(double) image->columns);
7038 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7039 " image->rows=%.20g",(double) image->rows);
7040 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7041 " image->matte=%.20g",(double) image->matte);
7042 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7043 " image->depth=%.20g",(double) image->depth);
7045 if (image->storage_class == PseudoClass && image->colormap != NULL)
7047 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7048 " Original colormap:");
7049 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7050 " i (red,green,blue,opacity)");
7052 for (i=0; i < 256; i++)
7054 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7055 " %d (%d,%d,%d,%d)",
7057 (int) image->colormap[i].red,
7058 (int) image->colormap[i].green,
7059 (int) image->colormap[i].blue,
7060 (int) image->colormap[i].opacity);
7063 for (i=image->colors - 10; i < (ssize_t) image->colors; i++)
7067 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7068 " %d (%d,%d,%d,%d)",
7070 (int) image->colormap[i].red,
7071 (int) image->colormap[i].green,
7072 (int) image->colormap[i].blue,
7073 (int) image->colormap[i].opacity);
7078 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7079 " image->colors=%d",(int) image->colors);
7081 if (image->colors == 0)
7082 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7083 " (zero means unknown)");
7085 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7086 " Regenerate the colormap");
7089 exception=(&image->exception);
7093 number_semitransparent = 0;
7094 number_transparent = 0;
7096 for (y=0; y < (ssize_t) image->rows; y++)
7098 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
7100 if (q == (PixelPacket *) NULL)
7103 for (x=0; x < (ssize_t) image->columns; x++)
7105 if (image->matte == MagickFalse || q->opacity == OpaqueOpacity)
7107 if (number_opaque < 259)
7109 if (number_opaque == 0)
7112 opaque[0].opacity=OpaqueOpacity;
7116 for (i=0; i< (ssize_t) number_opaque; i++)
7118 if (IsColorEqual(opaque+i, (PixelPacket *) q))
7122 if (i == (ssize_t) number_opaque &&
7123 number_opaque < 259)
7127 opaque[i].opacity = OpaqueOpacity;
7131 else if (q->opacity == TransparentOpacity)
7133 if (number_transparent < 259)
7135 if (number_transparent == 0)
7138 ping_trans_color.red=(unsigned short)(q->red);
7139 ping_trans_color.green=(unsigned short) (q->green);
7140 ping_trans_color.blue=(unsigned short) (q->blue);
7141 ping_trans_color.gray=(unsigned short) (q->blue);
7142 number_transparent = 1;
7145 for (i=0; i< (ssize_t) number_transparent; i++)
7147 if (IsColorEqual(transparent+i, (PixelPacket *) q))
7151 if (i == (ssize_t) number_transparent &&
7152 number_transparent < 259)
7154 number_transparent++;
7155 transparent[i] = *q;
7161 if (number_semitransparent < 259)
7163 if (number_semitransparent == 0)
7165 semitransparent[0]=*q;
7166 number_semitransparent = 1;
7169 for (i=0; i< (ssize_t) number_semitransparent; i++)
7171 if (IsColorEqual(semitransparent+i,
7172 (PixelPacket *) q) &&
7173 q->opacity == semitransparent[i].opacity)
7177 if (i == (ssize_t) number_semitransparent &&
7178 number_semitransparent < 259)
7180 number_semitransparent++;
7181 semitransparent[i] = *q;
7189 if (ping_exclude_bKGD == MagickFalse)
7191 /* Add the background color to the palette, if it
7192 * isn't already there.
7194 for (i=0; i<number_opaque; i++)
7196 if (IsColorEqual(opaque+i, &image->background_color))
7200 if (number_opaque < 259 && i == number_opaque)
7202 opaque[i]=image->background_color;
7203 opaque[i].opacity = OpaqueOpacity;
7206 else if (logging != MagickFalse)
7207 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7208 " No room in the colormap to add background color");
7211 image_colors=number_opaque+number_transparent+number_semitransparent;
7213 if (mng_info->write_png8 != MagickFalse && image_colors > 256)
7215 /* No room for the background color; remove it. */
7220 if (logging != MagickFalse)
7222 if (image_colors > 256)
7223 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7224 " image has more than 256 colors");
7227 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7228 " image has %d colors",image_colors);
7231 if (mng_info->write_png_colortype != 7) /* We won't need this info */
7233 ping_have_color=MagickFalse;
7234 ping_have_non_bw=MagickFalse;
7236 if(image_colors > 256)
7238 for (y=0; y < (ssize_t) image->rows; y++)
7240 q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
7242 if (q == (PixelPacket *) NULL)
7245 /* Worst case is black-and-white; we are looking at every
7249 if (ping_have_color == MagickFalse)
7252 for (x=0; x < (ssize_t) image->columns; x++)
7254 if (s->red != s->green || s->red != s->blue)
7256 ping_have_color=MagickTrue;
7257 ping_have_non_bw=MagickTrue;
7264 if (ping_have_non_bw == MagickFalse)
7267 for (x=0; x < (ssize_t) image->columns; x++)
7269 if (s->red != 0 && s->red != QuantumRange)
7271 ping_have_non_bw=MagickTrue;
7280 if (image_colors < 257)
7286 * Initialize image colormap.
7289 if (logging != MagickFalse)
7290 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7291 " Sort the new colormap");
7293 /* Sort palette, transparent first */;
7297 for (i=0; i<number_transparent; i++)
7298 colormap[n++] = transparent[i];
7300 for (i=0; i<number_semitransparent; i++)
7301 colormap[n++] = semitransparent[i];
7303 for (i=0; i<number_opaque; i++)
7304 colormap[n++] = opaque[i];
7307 /* image_colors < 257; search the colormap instead of the pixels
7308 * to get ping_have_color and ping_have_non_bw
7312 if (ping_have_color == MagickFalse)
7314 if (colormap[i].red != colormap[i].green ||
7315 colormap[i].red != colormap[i].blue)
7317 ping_have_color=MagickTrue;
7318 ping_have_non_bw=MagickTrue;
7323 if (ping_have_non_bw == MagickFalse)
7325 if (colormap[i].red != 0 && colormap[i].red != QuantumRange)
7326 ping_have_non_bw=MagickTrue;
7330 if ((mng_info->ping_exclude_tRNS == MagickFalse ||
7331 (number_transparent == 0 && number_semitransparent == 0)) &&
7332 (((mng_info->write_png_colortype-1) ==
7333 PNG_COLOR_TYPE_PALETTE) ||
7334 (mng_info->write_png_colortype == 0)))
7336 if (logging != MagickFalse)
7338 if (n != (ssize_t) image_colors)
7339 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7340 " image_colors (%d) and n (%d) don't match",
7343 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7344 " AcquireImageColormap");
7347 image->colors = image_colors;
7349 if (AcquireImageColormap(image,image_colors) ==
7351 ThrowWriterException(ResourceLimitError,
7352 "MemoryAllocationFailed");
7354 for (i=0; i< (ssize_t) image_colors; i++)
7355 image->colormap[i] = colormap[i];
7357 if (logging != MagickFalse)
7359 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7360 " image->colors=%d (%d)",
7361 (int) image->colors, image_colors);
7363 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7364 " Update the pixel indexes");
7367 /* Sync the pixel indices with the new colormap */
7369 for (y=0; y < (ssize_t) image->rows; y++)
7371 q=GetAuthenticPixels(image,0,y,image->columns,1,
7374 if (q == (PixelPacket *) NULL)
7377 indexes=GetAuthenticIndexQueue(image);
7379 for (x=0; x < (ssize_t) image->columns; x++)
7381 for (i=0; i< (ssize_t) image_colors; i++)
7383 if ((image->matte == MagickFalse ||
7384 image->colormap[i].opacity == q->opacity) &&
7385 (IsColorEqual(&image->colormap[i],
7386 (PixelPacket *) q)))
7388 indexes[x]=(IndexPacket) i;
7395 if (SyncAuthenticPixels(image,exception) == MagickFalse)
7401 if (logging != MagickFalse)
7403 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7404 " image->colors=%d", (int) image->colors);
7406 if (image->colormap != NULL)
7408 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7409 " i (red,green,blue,opacity)");
7411 for (i=0; i < (ssize_t) image->colors; i++)
7413 if (i < 300 || i >= image->colors - 10)
7415 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7416 " %d (%d,%d,%d,%d)",
7418 (int) image->colormap[i].red,
7419 (int) image->colormap[i].green,
7420 (int) image->colormap[i].blue,
7421 (int) image->colormap[i].opacity);
7426 if (number_transparent < 257)
7427 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7428 " number_transparent = %d",
7429 number_transparent);
7432 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7433 " number_transparent > 256");
7435 if (number_opaque < 257)
7436 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7437 " number_opaque = %d",
7441 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7442 " number_opaque > 256");
7444 if (number_semitransparent < 257)
7445 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7446 " number_semitransparent = %d",
7447 number_semitransparent);
7450 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7451 " number_semitransparent > 256");
7453 if (ping_have_non_bw == MagickFalse)
7454 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7455 " All pixels and the background are black or white");
7457 else if (ping_have_color == MagickFalse)
7458 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7459 " All pixels and the background are gray");
7462 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7463 " At least one pixel or the background is non-gray");
7465 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7466 " Exit BUILD_PALETTE:");
7469 if (mng_info->write_png8 == MagickFalse)
7472 /* Make any reductions necessary for the PNG8 format */
7473 if (image_colors <= 256 &&
7474 image_colors != 0 && image->colormap != NULL &&
7475 number_semitransparent == 0 &&
7476 number_transparent <= 1)
7479 /* PNG8 can't have semitransparent colors so we threshold the
7480 * opacity to 0 or OpaqueOpacity
7482 if (number_semitransparent != 0)
7484 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7485 " Thresholding the alpha channel to binary");
7487 for (y=0; y < (ssize_t) image->rows; y++)
7489 r=GetAuthenticPixels(image,0,y,image->columns,1,
7492 if (r == (PixelPacket *) NULL)
7495 for (x=0; x < (ssize_t) image->columns; x++)
7497 r->opacity = r->opacity > OpaqueOpacity/2 ? 0 :
7502 if (SyncAuthenticPixels(image,exception) == MagickFalse)
7505 if (image_colors != 0 && image_colors <= 256 &&
7506 image->colormap != NULL)
7507 for (i=0; i<image_colors; i++)
7508 image->colormap[i].opacity =
7509 image->colormap[i].opacity > OpaqueOpacity/2 ? 0 :
7515 /* PNG8 can't have more than 256 colors so we quantize the pixels and
7516 * background color to the 3-3-2 palette.
7519 if (image_colors == 0 || image_colors > 256)
7521 if (logging != MagickFalse)
7522 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7523 " Quantizing the background color to 3-3-2");
7525 image->background_color.red=
7527 image->background_color.red) >> PNGK) & 0xe0) ) |
7529 image->background_color.red) >> PNGK) & 0xe0) >> 3) |
7531 image->background_color.red) >> PNGK) & 0xc0) >> 6)) * PNGM;
7532 image->background_color.green=
7534 image->background_color.green) >> PNGK) & 0xe0) ) |
7536 image->background_color.green) >> PNGK) & 0xe0) >> 3) |
7538 image->background_color.green) >> PNGK) & 0xc0) >> 6)) * PNGM;
7539 image->background_color.blue=
7541 image->background_color.blue) >> PNGK) & 0xc0) ) |
7543 image->background_color.blue) >> PNGK) & 0xc0) >> 2) |
7545 image->background_color.blue) >> PNGK) & 0xc0) >> 4) |
7547 image->background_color.blue) >> PNGK) & 0xc0) >> 6)) * PNGM;
7549 if (logging != MagickFalse)
7550 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7551 " Quantizing the pixel colors to 3-3-2");
7553 if (image->colormap == NULL)
7555 for (y=0; y < (ssize_t) image->rows; y++)
7557 r=GetAuthenticPixels(image,0,y,image->columns,1,
7560 if (r == (PixelPacket *) NULL)
7563 for (x=0; x < (ssize_t) image->columns; x++)
7566 ((((((size_t) r->red) >> PNGK) & 0xe0) ) |
7567 (((((size_t) r->red) >> PNGK) & 0xe0) >> 3) |
7568 (((((size_t) r->red) >> PNGK) & 0xc0) >> 6)) * PNGM;
7570 ((((((size_t) r->green) >> PNGK) & 0xe0) ) |
7571 (((((size_t) r->green) >> PNGK) & 0xe0) >> 3) |
7572 (((((size_t) r->green) >> PNGK) & 0xc0) >> 6)) * PNGM;
7574 ((((((size_t) r->blue) >> PNGK) & 0xc0) ) |
7575 (((((size_t) r->blue) >> PNGK) & 0xc0) >> 2) |
7576 (((((size_t) r->blue) >> PNGK) & 0xc0) >> 4) |
7577 (((((size_t) r->blue) >> PNGK) & 0xc0) >> 6)) * PNGM;
7581 if (SyncAuthenticPixels(image,exception) == MagickFalse)
7586 else /* Should not reach this; colormap already exists and
7589 if (logging != MagickFalse)
7590 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7591 " Quantizing the colormap to 3-3-2");
7592 for (i=0; i<image_colors; i++)
7594 image->colormap[i].red=
7596 image->colormap[i].red) >> PNGK) & 0xe0) ) |
7598 image->colormap[i].red) >> PNGK) & 0xe0) >> 3) |
7600 image->colormap[i].red) >> PNGK) & 0xc0) >> 6)) * PNGM;
7601 image->colormap[i].green=
7603 image->colormap[i].green) >> PNGK) & 0xe0) ) |
7605 image->colormap[i].green) >> PNGK) & 0xe0) >> 3) |
7607 image->colormap[i].green) >> PNGK) & 0xc0) >> 6)) * PNGM;
7608 image->colormap[i].blue=
7610 image->colormap[i].blue) >> PNGK) & 0xc0) ) |
7612 image->colormap[i].blue) >> PNGK) & 0xc0) >> 2) |
7614 image->colormap[i].blue) >> PNGK) & 0xc0) >> 4) |
7616 image->colormap[i].blue) >> PNGK) & 0xc0) >> 6)) * PNGM;
7623 /* END OF BUILD_PALETTE */
7625 /* If we are excluding the tRNS chunk and there is transparency,
7626 * then we must write a Gray-Alpha (color-type 4) or RGBA (color-type 6)
7629 if (mng_info->ping_exclude_tRNS != MagickFalse &&
7630 (number_transparent != 0 || number_semitransparent != 0))
7632 int colortype=mng_info->write_png_colortype;
7634 if (ping_have_color == MagickFalse)
7635 mng_info->write_png_colortype = 5;
7638 mng_info->write_png_colortype = 7;
7640 if (colortype != 0 &&
7641 mng_info->write_png_colortype != (ssize_t) colortype)
7642 ping_need_colortype_warning=MagickTrue;
7646 /* See if cheap transparency is possible. It is only possible
7647 * when there is a single transparent color, no semitransparent
7648 * color, and no opaque color that has the same RGB components
7649 * as the transparent color. We only need this information if
7650 * we are writing a PNG with colortype 0 or 2, and we have not
7651 * excluded the tRNS chunk.
7653 if (number_transparent == 1 &&
7654 mng_info->write_png_colortype < 4)
7656 ping_have_cheap_transparency = MagickTrue;
7658 if (number_semitransparent != 0)
7659 ping_have_cheap_transparency = MagickFalse;
7661 else if (image_colors == 0 || image_colors > 256 ||
7662 image->colormap == NULL)
7667 register const PixelPacket
7670 exception=(&image->exception);
7672 for (y=0; y < (ssize_t) image->rows; y++)
7674 q=GetVirtualPixels(image,0,y,image->columns,1, exception);
7676 if (q == (PixelPacket *) NULL)
7679 for (x=0; x < (ssize_t) image->columns; x++)
7681 if (q->opacity != TransparentOpacity &&
7682 (unsigned short) q->red == ping_trans_color.red &&
7683 (unsigned short) q->green == ping_trans_color.green &&
7684 (unsigned short) q->blue == ping_trans_color.blue)
7686 ping_have_cheap_transparency = MagickFalse;
7693 if (ping_have_cheap_transparency == MagickFalse)
7699 /* Assuming that image->colormap[0] is the one transparent color
7700 * and that all others are opaque.
7702 if (image_colors > 1)
7703 for (i=1; i<image_colors; i++)
7704 if (image->colormap[i].red == image->colormap[0].red &&
7705 image->colormap[i].green == image->colormap[0].green &&
7706 image->colormap[i].blue == image->colormap[0].blue)
7708 ping_have_cheap_transparency = MagickFalse;
7713 if (logging != MagickFalse)
7715 if (ping_have_cheap_transparency == MagickFalse)
7716 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7717 " Cheap transparency is not possible.");
7720 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7721 " Cheap transparency is possible.");
7725 ping_have_cheap_transparency = MagickFalse;
7727 image_depth=image->depth;
7729 quantum_info = (QuantumInfo *) NULL;
7731 image_colors=(int) image->colors;
7732 image_matte=image->matte;
7734 mng_info->IsPalette=image->storage_class == PseudoClass &&
7735 image_colors <= 256 && image->colormap != NULL;
7737 if ((mng_info->write_png_colortype == 4 || mng_info->write_png8) &&
7738 (image->colors == 0 || image->colormap == NULL))
7740 image_info=DestroyImageInfo(image_info);
7741 image=DestroyImage(image);
7742 (void) ThrowMagickException(&IMimage->exception,
7743 GetMagickModule(),CoderError,
7744 "Cannot write PNG8 or color-type 3; colormap is NULL",
7745 "`%s'",IMimage->filename);
7746 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
7747 UnlockSemaphoreInfo(ping_semaphore);
7749 return(MagickFalse);
7753 Allocate the PNG structures
7755 #ifdef PNG_USER_MEM_SUPPORTED
7756 ping=png_create_write_struct_2(PNG_LIBPNG_VER_STRING,image,
7757 MagickPNGErrorHandler,MagickPNGWarningHandler,(void *) NULL,
7758 (png_malloc_ptr) Magick_png_malloc,(png_free_ptr) Magick_png_free);
7761 ping=png_create_write_struct(PNG_LIBPNG_VER_STRING,image,
7762 MagickPNGErrorHandler,MagickPNGWarningHandler);
7765 if (ping == (png_struct *) NULL)
7766 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
7768 ping_info=png_create_info_struct(ping);
7770 if (ping_info == (png_info *) NULL)
7772 png_destroy_write_struct(&ping,(png_info **) NULL);
7773 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
7776 png_set_write_fn(ping,image,png_put_data,png_flush_data);
7777 ping_pixels=(unsigned char *) NULL;
7779 if (setjmp(png_jmpbuf(ping)))
7785 if (image_info->verbose)
7786 (void) printf("PNG write has failed.\n");
7788 png_destroy_write_struct(&ping,&ping_info);
7789 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
7790 UnlockSemaphoreInfo(ping_semaphore);
7792 if (ping_have_blob != MagickFalse)
7793 (void) CloseBlob(image);
7794 image_info=DestroyImageInfo(image_info);
7795 image=DestroyImage(image);
7796 return(MagickFalse);
7799 Prepare PNG for writing.
7801 #if defined(PNG_MNG_FEATURES_SUPPORTED)
7802 if (mng_info->write_mng)
7803 (void) png_permit_mng_features(ping,PNG_ALL_MNG_FEATURES);
7806 # ifdef PNG_WRITE_EMPTY_PLTE_SUPPORTED
7807 if (mng_info->write_mng)
7808 png_permit_empty_plte(ping,MagickTrue);
7815 ping_width=(png_uint_32) image->columns;
7816 ping_height=(png_uint_32) image->rows;
7818 if (mng_info->write_png8 || mng_info->write_png24 || mng_info->write_png32)
7821 if (mng_info->write_png_depth != 0)
7822 image_depth=mng_info->write_png_depth;
7824 /* Adjust requested depth to next higher valid depth if necessary */
7825 if (image_depth > 8)
7828 if ((image_depth > 4) && (image_depth < 8))
7831 if (image_depth == 3)
7834 if (logging != MagickFalse)
7836 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7837 " width=%.20g",(double) ping_width);
7838 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7839 " height=%.20g",(double) ping_height);
7840 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7841 " image_matte=%.20g",(double) image->matte);
7842 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7843 " image->depth=%.20g",(double) image->depth);
7844 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7845 " Tentative ping_bit_depth=%.20g",(double) image_depth);
7848 save_image_depth=image_depth;
7849 ping_bit_depth=(png_byte) save_image_depth;
7852 #if defined(PNG_pHYs_SUPPORTED)
7853 if (ping_exclude_pHYs == MagickFalse)
7855 if ((image->x_resolution != 0) && (image->y_resolution != 0) &&
7856 (!mng_info->write_mng || !mng_info->equal_physs))
7858 if (logging != MagickFalse)
7859 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7860 " Setting up pHYs chunk");
7862 if (image->units == PixelsPerInchResolution)
7864 ping_pHYs_unit_type=PNG_RESOLUTION_METER;
7865 ping_pHYs_x_resolution=
7866 (png_uint_32) ((100.0*image->x_resolution+0.5)/2.54);
7867 ping_pHYs_y_resolution=
7868 (png_uint_32) ((100.0*image->y_resolution+0.5)/2.54);
7871 else if (image->units == PixelsPerCentimeterResolution)
7873 ping_pHYs_unit_type=PNG_RESOLUTION_METER;
7874 ping_pHYs_x_resolution=(png_uint_32) (100.0*image->x_resolution+0.5);
7875 ping_pHYs_y_resolution=(png_uint_32) (100.0*image->y_resolution+0.5);
7880 ping_pHYs_unit_type=PNG_RESOLUTION_UNKNOWN;
7881 ping_pHYs_x_resolution=(png_uint_32) image->x_resolution;
7882 ping_pHYs_y_resolution=(png_uint_32) image->y_resolution;
7885 if (logging != MagickFalse)
7886 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7887 " Set up PNG pHYs chunk: xres: %.20g, yres: %.20g, units: %d.",
7888 (double) ping_pHYs_x_resolution,(double) ping_pHYs_y_resolution,
7889 (int) ping_pHYs_unit_type);
7890 ping_have_pHYs = MagickTrue;
7895 if (ping_exclude_bKGD == MagickFalse)
7897 if ((!mng_info->adjoin || !mng_info->equal_backgrounds))
7903 if (ping_bit_depth == 8)
7906 if (ping_bit_depth == 4)
7909 if (ping_bit_depth == 2)
7912 if (ping_bit_depth == 1)
7915 ping_background.red=(png_uint_16)
7916 (ScaleQuantumToShort(image->background_color.red) & mask);
7918 ping_background.green=(png_uint_16)
7919 (ScaleQuantumToShort(image->background_color.green) & mask);
7921 ping_background.blue=(png_uint_16)
7922 (ScaleQuantumToShort(image->background_color.blue) & mask);
7925 if (logging != MagickFalse)
7927 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7928 " Setting up bKGD chunk (1)");
7930 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7931 " ping_bit_depth=%d",ping_bit_depth);
7934 ping_have_bKGD = MagickTrue;
7938 Select the color type.
7943 if (mng_info->IsPalette && mng_info->write_png8)
7946 /* To do: make this a function cause it's used twice, except
7947 for reducing the sample depth from 8. */
7949 number_colors=image_colors;
7951 ping_have_tRNS=MagickFalse;
7956 ping_color_type=(png_byte) PNG_COLOR_TYPE_PALETTE;
7958 if (logging != MagickFalse)
7959 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7960 " Setting up PLTE chunk with %d colors (%d)",
7961 number_colors, image_colors);
7963 for (i=0; i < (ssize_t) number_colors; i++)
7965 palette[i].red=ScaleQuantumToChar(image->colormap[i].red);
7966 palette[i].green=ScaleQuantumToChar(image->colormap[i].green);
7967 palette[i].blue=ScaleQuantumToChar(image->colormap[i].blue);
7968 if (logging != MagickFalse)
7969 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
7970 #if MAGICKCORE_QUANTUM_DEPTH == 8
7971 " %3ld (%3d,%3d,%3d)",
7973 " %5ld (%5d,%5d,%5d)",
7975 (long) i,palette[i].red,palette[i].green,palette[i].blue);
7979 ping_have_PLTE=MagickTrue;
7980 image_depth=ping_bit_depth;
7983 if (matte != MagickFalse)
7986 Identify which colormap entry is transparent.
7988 assert(number_colors <= 256);
7989 assert(image->colormap != NULL);
7991 for (i=0; i < (ssize_t) number_transparent; i++)
7992 ping_trans_alpha[i]=0;
7995 ping_num_trans=(unsigned short) (number_transparent +
7996 number_semitransparent);
7998 if (ping_num_trans == 0)
7999 ping_have_tRNS=MagickFalse;
8002 ping_have_tRNS=MagickTrue;
8005 if (ping_exclude_bKGD == MagickFalse)
8008 * Identify which colormap entry is the background color.
8011 for (i=0; i < (ssize_t) MagickMax(1L*number_colors-1L,1L); i++)
8012 if (IsPNGColorEqual(ping_background,image->colormap[i]))
8015 ping_background.index=(png_byte) i;
8017 } /* end of write_png8 */
8019 else if (mng_info->write_png24)
8021 image_matte=MagickFalse;
8022 ping_color_type=(png_byte) PNG_COLOR_TYPE_RGB;
8025 else if (mng_info->write_png32)
8027 image_matte=MagickTrue;
8028 ping_color_type=(png_byte) PNG_COLOR_TYPE_RGB_ALPHA;
8031 else /* mng_info->write_pngNN not specified */
8033 image_depth=ping_bit_depth;
8035 if (mng_info->write_png_colortype != 0)
8037 ping_color_type=(png_byte) mng_info->write_png_colortype-1;
8039 if (ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
8040 ping_color_type == PNG_COLOR_TYPE_RGB_ALPHA)
8041 image_matte=MagickTrue;
8044 image_matte=MagickFalse;
8047 else /* write_ping_colortype not specified */
8049 if (logging != MagickFalse)
8050 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8051 " Selecting PNG colortype:");
8053 ping_color_type=(png_byte) ((matte != MagickFalse)?
8054 PNG_COLOR_TYPE_RGB_ALPHA:PNG_COLOR_TYPE_RGB);
8056 if (image_info->type == TrueColorType)
8058 ping_color_type=(png_byte) PNG_COLOR_TYPE_RGB;
8059 image_matte=MagickFalse;
8062 if (image_info->type == TrueColorMatteType)
8064 ping_color_type=(png_byte) PNG_COLOR_TYPE_RGB_ALPHA;
8065 image_matte=MagickTrue;
8068 if (image_info->type == PaletteType ||
8069 image_info->type == PaletteMatteType)
8070 ping_color_type=(png_byte) PNG_COLOR_TYPE_PALETTE;
8072 if (image_info->type == UndefinedType ||
8073 image_info->type == OptimizeType)
8075 if (ping_have_color == MagickFalse)
8077 if (image_matte == MagickFalse)
8079 ping_color_type=(png_byte) PNG_COLOR_TYPE_GRAY;
8080 image_matte=MagickFalse;
8085 ping_color_type=(png_byte) PNG_COLOR_TYPE_GRAY_ALPHA;
8086 image_matte=MagickTrue;
8091 if (image_matte == MagickFalse)
8093 ping_color_type=(png_byte) PNG_COLOR_TYPE_RGB;
8094 image_matte=MagickFalse;
8099 ping_color_type=(png_byte) PNG_COLOR_TYPE_RGBA;
8100 image_matte=MagickTrue;
8107 if (logging != MagickFalse)
8108 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8109 " Selected PNG colortype=%d",ping_color_type);
8111 if (ping_bit_depth < 8)
8113 if (ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
8114 ping_color_type == PNG_COLOR_TYPE_RGB ||
8115 ping_color_type == PNG_COLOR_TYPE_RGB_ALPHA)
8119 old_bit_depth=ping_bit_depth;
8121 if (ping_color_type == PNG_COLOR_TYPE_GRAY)
8123 if (image->matte == MagickFalse && ping_have_non_bw == MagickFalse)
8127 if (ping_color_type == PNG_COLOR_TYPE_PALETTE)
8132 if (image->colors == 0)
8135 (void) ThrowMagickException(&image->exception,
8136 GetMagickModule(),CoderError,
8137 "image has 0 colors", "`%s'","");
8140 while ((int) (one << ping_bit_depth) < (ssize_t) image_colors)
8141 ping_bit_depth <<= 1;
8144 if (logging != MagickFalse)
8146 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8147 " Number of colors: %.20g",(double) image_colors);
8149 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8150 " Tentative PNG bit depth: %d",ping_bit_depth);
8153 if (ping_bit_depth < (int) mng_info->write_png_depth)
8154 ping_bit_depth = mng_info->write_png_depth;
8157 image_depth=ping_bit_depth;
8159 if (logging != MagickFalse)
8161 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8162 " Tentative PNG color type: %.20g",(double) ping_color_type);
8164 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8165 " image_info->type: %.20g",(double) image_info->type);
8167 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8168 " image_depth: %.20g",(double) image_depth);
8170 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8172 " image->depth: %.20g",(double) image->depth);
8174 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8175 " ping_bit_depth: %.20g",(double) ping_bit_depth);
8178 if (matte != MagickFalse)
8180 if (mng_info->IsPalette)
8182 ping_color_type=PNG_COLOR_TYPE_GRAY_ALPHA;
8184 if (ping_have_color != MagickFalse)
8185 ping_color_type=PNG_COLOR_TYPE_RGBA;
8188 * Determine if there is any transparent color.
8190 if (number_transparent + number_semitransparent == 0)
8193 No transparent pixels are present. Change 4 or 6 to 0 or 2.
8196 image_matte=MagickFalse;
8197 ping_color_type&=0x03;
8207 if (ping_bit_depth == 8)
8210 if (ping_bit_depth == 4)
8213 if (ping_bit_depth == 2)
8216 if (ping_bit_depth == 1)
8219 ping_trans_color.red=(png_uint_16)
8220 (ScaleQuantumToShort(image->colormap[0].red) & mask);
8222 ping_trans_color.green=(png_uint_16)
8223 (ScaleQuantumToShort(image->colormap[0].green) & mask);
8225 ping_trans_color.blue=(png_uint_16)
8226 (ScaleQuantumToShort(image->colormap[0].blue) & mask);
8228 ping_trans_color.gray=(png_uint_16)
8229 (ScaleQuantumToShort(PixelIntensityToQuantum(
8230 image->colormap)) & mask);
8232 ping_trans_color.index=(png_byte) 0;
8234 ping_have_tRNS=MagickTrue;
8237 if (ping_have_tRNS != MagickFalse)
8240 * Determine if there is one and only one transparent color
8241 * and if so if it is fully transparent.
8243 if (ping_have_cheap_transparency == MagickFalse)
8244 ping_have_tRNS=MagickFalse;
8247 if (ping_have_tRNS != MagickFalse)
8249 ping_color_type &= 0x03; /* changes 4 or 6 to 0 or 2 */
8251 if (image_depth == 8)
8253 ping_trans_color.red&=0xff;
8254 ping_trans_color.green&=0xff;
8255 ping_trans_color.blue&=0xff;
8256 ping_trans_color.gray&=0xff;
8262 if (image_depth == 8)
8264 ping_trans_color.red&=0xff;
8265 ping_trans_color.green&=0xff;
8266 ping_trans_color.blue&=0xff;
8267 ping_trans_color.gray&=0xff;
8274 if (ping_have_tRNS != MagickFalse)
8275 image_matte=MagickFalse;
8277 if ((mng_info->IsPalette) &&
8278 mng_info->write_png_colortype-1 != PNG_COLOR_TYPE_PALETTE &&
8279 ping_have_color == MagickFalse &&
8280 (image_matte == MagickFalse || image_depth >= 8))
8284 if (image_matte != MagickFalse)
8285 ping_color_type=PNG_COLOR_TYPE_GRAY_ALPHA;
8289 ping_color_type=PNG_COLOR_TYPE_GRAY;
8291 if (save_image_depth == 16 && image_depth == 8)
8293 if (logging != MagickFalse)
8295 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8296 " Scaling ping_trans_color (0)");
8298 ping_trans_color.gray*=0x0101;
8302 if (image_depth > MAGICKCORE_QUANTUM_DEPTH)
8303 image_depth=MAGICKCORE_QUANTUM_DEPTH;
8305 if (image_colors == 0 || image_colors-1 > MaxColormapSize)
8306 image_colors=(int) (one << image_depth);
8308 if (image_depth > 8)
8314 if ((int) ping_color_type == PNG_COLOR_TYPE_PALETTE)
8316 if(!mng_info->write_png_depth)
8320 while ((int) (one << ping_bit_depth)
8321 < (ssize_t) image_colors)
8322 ping_bit_depth <<= 1;
8326 else if (ping_color_type ==
8327 PNG_COLOR_TYPE_GRAY && image_colors < 17 &&
8328 mng_info->IsPalette)
8330 /* Check if grayscale is reducible */
8332 #define LOW_DEPTH_OK 0 /* To do: eliminate this when low bit-depths work */
8335 depth_4_ok=MagickTrue,
8336 depth_2_ok=MagickTrue,
8338 depth_1_ok=MagickTrue;
8340 for (i=0; i < (ssize_t) image_colors; i++)
8345 intensity=ScaleQuantumToChar(image->colormap[i].red);
8348 if ((intensity & 0x0f) != ((intensity & 0xf0) >> 4))
8349 depth_4_ok=depth_2_ok=depth_1_ok=MagickFalse;
8350 else if ((intensity & 0x03) != ((intensity & 0x0c) >> 2))
8351 depth_2_ok=depth_1_ok=MagickFalse;
8354 if ((intensity & 0x01) != ((intensity & 0x02) >> 1))
8355 depth_1_ok=MagickFalse;
8358 if (depth_1_ok && mng_info->write_png_depth <= 1)
8362 else if (depth_2_ok && mng_info->write_png_depth <= 2)
8365 else if (depth_4_ok && mng_info->write_png_depth <= 4)
8371 image_depth=ping_bit_depth;
8376 if (mng_info->IsPalette)
8378 number_colors=image_colors;
8380 if (image_depth <= 8)
8385 ping_color_type=(png_byte) PNG_COLOR_TYPE_PALETTE;
8387 if (mng_info->have_write_global_plte && matte == MagickFalse)
8389 png_set_PLTE(ping,ping_info,NULL,0);
8391 if (logging != MagickFalse)
8392 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8393 " Setting up empty PLTE chunk");
8398 for (i=0; i < (ssize_t) number_colors; i++)
8400 palette[i].red=ScaleQuantumToChar(image->colormap[i].red);
8401 palette[i].green=ScaleQuantumToChar(image->colormap[i].green);
8402 palette[i].blue=ScaleQuantumToChar(image->colormap[i].blue);
8405 if (logging != MagickFalse)
8406 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8407 " Setting up PLTE chunk with %d colors",
8410 ping_have_PLTE=MagickTrue;
8413 /* color_type is PNG_COLOR_TYPE_PALETTE */
8414 if (mng_info->write_png_depth == 0)
8422 while ((one << ping_bit_depth) < number_colors)
8423 ping_bit_depth <<= 1;
8428 if (matte != MagickFalse)
8431 * Set up trans_colors array.
8433 assert(number_colors <= 256);
8435 ping_num_trans=(unsigned short) (number_transparent +
8436 number_semitransparent);
8438 if (ping_num_trans == 0)
8439 ping_have_tRNS=MagickFalse;
8443 if (logging != MagickFalse)
8445 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8446 " Scaling ping_trans_color (1)");
8448 ping_have_tRNS=MagickTrue;
8450 for (i=0; i < ping_num_trans; i++)
8452 ping_trans_alpha[i]= (png_byte) (255-
8453 ScaleQuantumToChar(image->colormap[i].opacity));
8463 if (image_depth < 8)
8466 if ((save_image_depth == 16) && (image_depth == 8))
8468 if (logging != MagickFalse)
8470 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8471 " Scaling ping_trans_color from (%d,%d,%d)",
8472 (int) ping_trans_color.red,
8473 (int) ping_trans_color.green,
8474 (int) ping_trans_color.blue);
8477 ping_trans_color.red*=0x0101;
8478 ping_trans_color.green*=0x0101;
8479 ping_trans_color.blue*=0x0101;
8480 ping_trans_color.gray*=0x0101;
8482 if (logging != MagickFalse)
8484 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8486 (int) ping_trans_color.red,
8487 (int) ping_trans_color.green,
8488 (int) ping_trans_color.blue);
8493 if (ping_bit_depth < (ssize_t) mng_info->write_png_depth)
8494 ping_bit_depth = (ssize_t) mng_info->write_png_depth;
8497 Adjust background and transparency samples in sub-8-bit grayscale files.
8499 if (ping_bit_depth < 8 && ping_color_type ==
8500 PNG_COLOR_TYPE_GRAY)
8508 maxval=(png_uint_16) ((one << ping_bit_depth)-1);
8510 if (ping_exclude_bKGD == MagickFalse)
8513 ping_background.gray=(png_uint_16)
8514 (QuantumScale*(maxval*(PixelIntensity(&image->background_color))));
8516 if (logging != MagickFalse)
8517 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8518 " Setting up bKGD chunk (2)");
8520 ping_have_bKGD = MagickTrue;
8523 ping_trans_color.gray=(png_uint_16) (QuantumScale*(maxval*
8524 ping_trans_color.gray));
8527 if (ping_exclude_bKGD == MagickFalse)
8529 if (mng_info->IsPalette && (int) ping_color_type == PNG_COLOR_TYPE_PALETTE)
8532 Identify which colormap entry is the background color.
8535 number_colors=image_colors;
8537 for (i=0; i < (ssize_t) MagickMax(1L*number_colors,1L); i++)
8538 if (IsPNGColorEqual(image->background_color,image->colormap[i]))
8541 ping_background.index=(png_byte) i;
8543 if (logging != MagickFalse)
8545 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8546 " Setting up bKGD chunk with index=%d",(int) i);
8549 if (i < (ssize_t) number_colors)
8551 ping_have_bKGD = MagickTrue;
8553 if (logging != MagickFalse)
8555 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8556 " background =(%d,%d,%d)",
8557 (int) ping_background.red,
8558 (int) ping_background.green,
8559 (int) ping_background.blue);
8563 else /* Can't happen */
8565 if (logging != MagickFalse)
8566 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8567 " No room in PLTE to add bKGD color");
8568 ping_have_bKGD = MagickFalse;
8573 if (logging != MagickFalse)
8574 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8575 " PNG color type: %d",ping_color_type);
8577 Initialize compression level and filtering.
8579 if (logging != MagickFalse)
8581 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8582 " Setting up deflate compression");
8584 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8585 " Compression buffer size: 32768");
8588 png_set_compression_buffer_size(ping,32768L);
8590 if (logging != MagickFalse)
8591 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8592 " Compression mem level: 9");
8594 png_set_compression_mem_level(ping, 9);
8596 quality=image->quality == UndefinedCompressionQuality ? 75UL :
8604 level=(int) MagickMin((ssize_t) quality/10,9);
8606 if (logging != MagickFalse)
8607 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8608 " Compression level: %d",level);
8610 png_set_compression_level(ping,level);
8615 if (logging != MagickFalse)
8616 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8617 " Compression strategy: Z_HUFFMAN_ONLY");
8619 png_set_compression_strategy(ping, Z_HUFFMAN_ONLY);
8622 if (logging != MagickFalse)
8623 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8624 " Setting up filtering");
8626 #if defined(PNG_MNG_FEATURES_SUPPORTED) && defined(PNG_INTRAPIXEL_DIFFERENCING)
8627 /* This became available in libpng-1.0.9. Output must be a MNG. */
8628 if (mng_info->write_mng && ((quality % 10) == 7))
8630 if (logging != MagickFalse)
8631 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8632 " Filter_type: PNG_INTRAPIXEL_DIFFERENCING");
8634 ping_filter_method=PNG_INTRAPIXEL_DIFFERENCING;
8638 if (logging != MagickFalse)
8639 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8647 if ((quality % 10) > 5)
8648 base_filter=PNG_ALL_FILTERS;
8651 if ((quality % 10) != 5)
8652 base_filter=(int) quality % 10;
8655 if (((int) ping_color_type == PNG_COLOR_TYPE_GRAY) ||
8656 ((int) ping_color_type == PNG_COLOR_TYPE_PALETTE) ||
8658 base_filter=PNG_NO_FILTERS;
8661 base_filter=PNG_ALL_FILTERS;
8663 if (logging != MagickFalse)
8665 if (base_filter == PNG_ALL_FILTERS)
8666 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8667 " Base filter method: ADAPTIVE");
8669 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8670 " Base filter method: NONE");
8673 png_set_filter(ping,PNG_FILTER_TYPE_BASE,base_filter);
8676 if ((ping_exclude_tEXt == MagickFalse || ping_exclude_zTXt == MagickFalse) &&
8677 (ping_exclude_iCCP == MagickFalse || ping_exclude_zCCP == MagickFalse))
8679 ResetImageProfileIterator(image);
8680 for (name=GetNextImageProfile(image); name != (const char *) NULL; )
8682 profile=GetImageProfile(image,name);
8684 if (profile != (StringInfo *) NULL)
8686 #ifdef PNG_WRITE_iCCP_SUPPORTED
8687 if ((LocaleCompare(name,"ICC") == 0) ||
8688 (LocaleCompare(name,"ICM") == 0))
8691 if (ping_exclude_iCCP == MagickFalse)
8693 png_set_iCCP(ping,ping_info,(const png_charp) name,0,
8694 #if (PNG_LIBPNG_VER < 10500)
8695 (png_charp) GetStringInfoDatum(profile),
8697 (png_const_bytep) GetStringInfoDatum(profile),
8699 (png_uint_32) GetStringInfoLength(profile));
8705 if (ping_exclude_zCCP == MagickFalse)
8707 Magick_png_write_raw_profile(image_info,ping,ping_info,
8708 (unsigned char *) name,(unsigned char *) name,
8709 GetStringInfoDatum(profile),
8710 (png_uint_32) GetStringInfoLength(profile));
8714 if (logging != MagickFalse)
8715 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8716 " Setting up text chunk with %s profile",name);
8718 name=GetNextImageProfile(image);
8722 #if defined(PNG_WRITE_sRGB_SUPPORTED)
8723 if ((mng_info->have_write_global_srgb == 0) &&
8724 ((image->rendering_intent != UndefinedIntent) ||
8725 (image->colorspace == sRGBColorspace)))
8727 if (ping_exclude_sRGB == MagickFalse)
8730 Note image rendering intent.
8732 if (logging != MagickFalse)
8733 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8734 " Setting up sRGB chunk");
8736 (void) png_set_sRGB(ping,ping_info,(
8737 Magick_RenderingIntent_to_PNG_RenderingIntent(
8738 image->rendering_intent)));
8740 if (ping_exclude_gAMA == MagickFalse)
8741 png_set_gAMA(ping,ping_info,0.45455);
8745 if ((!mng_info->write_mng) || (!png_get_valid(ping,ping_info,PNG_INFO_sRGB)))
8748 if (ping_exclude_gAMA == MagickFalse &&
8749 (ping_exclude_sRGB == MagickFalse ||
8750 (image->gamma < .45 || image->gamma > .46)))
8752 if ((mng_info->have_write_global_gama == 0) && (image->gamma != 0.0))
8756 To do: check for cHRM+gAMA == sRGB, and write sRGB instead.
8758 if (logging != MagickFalse)
8759 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8760 " Setting up gAMA chunk");
8762 png_set_gAMA(ping,ping_info,image->gamma);
8766 if (ping_exclude_cHRM == MagickFalse)
8768 if ((mng_info->have_write_global_chrm == 0) &&
8769 (image->chromaticity.red_primary.x != 0.0))
8772 Note image chromaticity.
8773 To do: check for cHRM+gAMA == sRGB, and write sRGB instead.
8781 wp=image->chromaticity.white_point;
8782 rp=image->chromaticity.red_primary;
8783 gp=image->chromaticity.green_primary;
8784 bp=image->chromaticity.blue_primary;
8786 if (logging != MagickFalse)
8787 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8788 " Setting up cHRM chunk");
8790 png_set_cHRM(ping,ping_info,wp.x,wp.y,rp.x,rp.y,gp.x,gp.y,
8796 ping_interlace_method=image_info->interlace != NoInterlace;
8798 if (mng_info->write_mng)
8799 png_set_sig_bytes(ping,8);
8801 /* Bail out if cannot meet defined PNG:bit-depth or PNG:color-type */
8803 if (mng_info->write_png_colortype != 0)
8805 if (mng_info->write_png_colortype-1 == PNG_COLOR_TYPE_GRAY)
8806 if (ping_have_color != MagickFalse)
8808 ping_color_type = PNG_COLOR_TYPE_RGB;
8810 if (ping_bit_depth < 8)
8814 if (mng_info->write_png_colortype-1 == PNG_COLOR_TYPE_GRAY_ALPHA)
8815 if (ping_have_color != MagickFalse)
8816 ping_color_type = PNG_COLOR_TYPE_RGB_ALPHA;
8819 if (ping_need_colortype_warning != MagickFalse ||
8820 ((mng_info->write_png_depth &&
8821 (int) mng_info->write_png_depth != ping_bit_depth) ||
8822 (mng_info->write_png_colortype &&
8823 ((int) mng_info->write_png_colortype-1 != ping_color_type &&
8824 mng_info->write_png_colortype != 7 &&
8825 !(mng_info->write_png_colortype == 5 && ping_color_type == 0)))))
8827 if (logging != MagickFalse)
8829 if (ping_need_colortype_warning != MagickFalse)
8831 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8832 " Image has transparency but tRNS chunk was excluded");
8835 if (mng_info->write_png_depth)
8837 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8838 " Defined PNG:bit-depth=%u, Computed depth=%u",
8839 mng_info->write_png_depth,
8843 if (mng_info->write_png_colortype)
8845 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8846 " Defined PNG:color-type=%u, Computed color type=%u",
8847 mng_info->write_png_colortype-1,
8853 "Cannot write image with defined PNG:bit-depth or PNG:color-type.");
8856 if (image_matte != MagickFalse && image->matte == MagickFalse)
8858 /* Add an opaque matte channel */
8859 image->matte = MagickTrue;
8860 (void) SetImageOpacity(image,0);
8862 if (logging != MagickFalse)
8863 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8864 " Added an opaque matte channel");
8867 if (number_transparent != 0 || number_semitransparent != 0)
8869 if (ping_color_type < 4)
8871 ping_have_tRNS=MagickTrue;
8872 if (logging != MagickFalse)
8873 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8874 " Setting ping_have_tRNS=MagickTrue.");
8878 if (logging != MagickFalse)
8879 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8880 " Writing PNG header chunks");
8882 png_set_IHDR(ping,ping_info,ping_width,ping_height,
8883 ping_bit_depth,ping_color_type,
8884 ping_interlace_method,ping_compression_method,
8885 ping_filter_method);
8887 if (ping_color_type == 3 && ping_have_PLTE != MagickFalse)
8889 png_set_PLTE(ping,ping_info,palette,number_colors);
8891 if (logging != MagickFalse)
8893 for (i=0; i< (ssize_t) number_colors; i++)
8895 if (i < ping_num_trans)
8896 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8897 " PLTE[%d] = (%d,%d,%d), tRNS[%d] = (%d)",
8899 (int) palette[i].red,
8900 (int) palette[i].green,
8901 (int) palette[i].blue,
8903 (int) ping_trans_alpha[i]);
8905 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8906 " PLTE[%d] = (%d,%d,%d)",
8908 (int) palette[i].red,
8909 (int) palette[i].green,
8910 (int) palette[i].blue);
8915 if (ping_exclude_bKGD == MagickFalse)
8917 if (ping_have_bKGD != MagickFalse)
8918 png_set_bKGD(ping,ping_info,&ping_background);
8921 if (ping_exclude_pHYs == MagickFalse)
8923 if (ping_have_pHYs != MagickFalse)
8925 png_set_pHYs(ping,ping_info,
8926 ping_pHYs_x_resolution,
8927 ping_pHYs_y_resolution,
8928 ping_pHYs_unit_type);
8932 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8933 " Setting up pHYs chunk");
8934 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8935 " x_resolution=%lu",
8936 (unsigned long) ping_pHYs_x_resolution);
8937 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8938 " y_resolution=%lu",
8939 (unsigned long) ping_pHYs_y_resolution);
8940 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8942 (unsigned long) ping_pHYs_unit_type);
8947 #if defined(PNG_oFFs_SUPPORTED)
8948 if (ping_exclude_oFFs == MagickFalse)
8950 if (image->page.x || image->page.y)
8952 png_set_oFFs(ping,ping_info,(png_int_32) image->page.x,
8953 (png_int_32) image->page.y, 0);
8955 if (logging != MagickFalse)
8956 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8957 " Setting up oFFs chunk with x=%d, y=%d, units=0",
8958 (int) image->page.x, (int) image->page.y);
8963 if (mng_info->need_blob != MagickFalse)
8965 if (OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception) ==
8967 png_error(ping,"WriteBlob Failed");
8969 ping_have_blob=MagickTrue;
8972 png_write_info_before_PLTE(ping, ping_info);
8974 if (ping_have_tRNS != MagickFalse && ping_color_type < 4)
8976 if (logging != MagickFalse)
8978 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8979 " Calling png_set_tRNS with num_trans=%d",ping_num_trans);
8982 if (ping_color_type == 3)
8983 (void) png_set_tRNS(ping, ping_info,
8990 (void) png_set_tRNS(ping, ping_info,
8995 if (logging != MagickFalse)
8997 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
8998 " tRNS color =(%d,%d,%d)",
8999 (int) ping_trans_color.red,
9000 (int) ping_trans_color.green,
9001 (int) ping_trans_color.blue);
9006 /* write any png-chunk-b profiles */
9007 (void) Magick_png_write_chunk_from_profile(image,"PNG-chunk-b",logging);
9009 png_write_info(ping,ping_info);
9011 /* write any PNG-chunk-m profiles */
9012 (void) Magick_png_write_chunk_from_profile(image,"PNG-chunk-m",logging);
9014 if (ping_exclude_vpAg == MagickFalse)
9016 if ((image->page.width != 0 && image->page.width != image->columns) ||
9017 (image->page.height != 0 && image->page.height != image->rows))
9022 (void) WriteBlobMSBULong(image,9L); /* data length=8 */
9023 PNGType(chunk,mng_vpAg);
9024 LogPNGChunk(logging,mng_vpAg,9L);
9025 PNGLong(chunk+4,(png_uint_32) image->page.width);
9026 PNGLong(chunk+8,(png_uint_32) image->page.height);
9027 chunk[12]=0; /* unit = pixels */
9028 (void) WriteBlob(image,13,chunk);
9029 (void) WriteBlobMSBULong(image,crc32(0,chunk,13));
9033 #if (PNG_LIBPNG_VER == 10206)
9034 /* avoid libpng-1.2.6 bug by setting PNG_HAVE_IDAT flag */
9035 #define PNG_HAVE_IDAT 0x04
9036 ping->mode |= PNG_HAVE_IDAT;
9037 #undef PNG_HAVE_IDAT
9040 png_set_packing(ping);
9044 rowbytes=image->columns;
9045 if (image_depth > 8)
9047 switch (ping_color_type)
9049 case PNG_COLOR_TYPE_RGB:
9053 case PNG_COLOR_TYPE_GRAY_ALPHA:
9057 case PNG_COLOR_TYPE_RGBA:
9065 if (logging != MagickFalse)
9067 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9068 " Writing PNG image data");
9070 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9071 " Allocating %.20g bytes of memory for pixels",(double) rowbytes);
9073 ping_pixels=(unsigned char *) AcquireQuantumMemory(rowbytes,
9074 sizeof(*ping_pixels));
9076 if (ping_pixels == (unsigned char *) NULL)
9077 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
9080 Initialize image scanlines.
9082 if (setjmp(png_jmpbuf(ping)))
9088 if (image_info->verbose)
9089 (void) printf("PNG write has failed.\n");
9091 png_destroy_write_struct(&ping,&ping_info);
9092 if (quantum_info != (QuantumInfo *) NULL)
9093 quantum_info=DestroyQuantumInfo(quantum_info);
9094 if (ping_pixels != (unsigned char *) NULL)
9095 ping_pixels=(unsigned char *) RelinquishMagickMemory(ping_pixels);
9096 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
9097 UnlockSemaphoreInfo(ping_semaphore);
9099 if (ping_have_blob != MagickFalse)
9100 (void) CloseBlob(image);
9101 image_info=DestroyImageInfo(image_info);
9102 image=DestroyImage(image);
9103 return(MagickFalse);
9105 quantum_info=AcquireQuantumInfo(image_info,image);
9106 if (quantum_info == (QuantumInfo *) NULL)
9107 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
9108 quantum_info->format=UndefinedQuantumFormat;
9109 quantum_info->depth=image_depth;
9110 num_passes=png_set_interlace_handling(ping);
9112 if ((!mng_info->write_png8 && !mng_info->write_png24 &&
9113 !mng_info->write_png32) &&
9114 (mng_info->IsPalette ||
9115 (image_info->type == BilevelType)) &&
9116 image_matte == MagickFalse &&
9117 ping_have_non_bw == MagickFalse)
9119 /* Palette, Bilevel, or Opaque Monochrome */
9120 register const PixelPacket
9123 quantum_info->depth=8;
9124 for (pass=0; pass < num_passes; pass++)
9127 Convert PseudoClass image to a PNG monochrome image.
9129 for (y=0; y < (ssize_t) image->rows; y++)
9131 if (logging != MagickFalse && y == 0)
9132 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9133 " Writing row of pixels (0)");
9135 p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
9137 if (p == (const PixelPacket *) NULL)
9140 if (mng_info->IsPalette)
9142 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9143 quantum_info,GrayQuantum,ping_pixels,&image->exception);
9144 if (mng_info->write_png_colortype-1 == PNG_COLOR_TYPE_PALETTE &&
9145 mng_info->write_png_depth &&
9146 mng_info->write_png_depth != old_bit_depth)
9148 /* Undo pixel scaling */
9149 for (i=0; i < (ssize_t) image->columns; i++)
9150 *(ping_pixels+i)=(unsigned char) (*(ping_pixels+i)
9151 >> (8-old_bit_depth));
9157 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9158 quantum_info,RedQuantum,ping_pixels,&image->exception);
9161 if (mng_info->write_png_colortype-1 != PNG_COLOR_TYPE_PALETTE)
9162 for (i=0; i < (ssize_t) image->columns; i++)
9163 *(ping_pixels+i)=(unsigned char) ((*(ping_pixels+i) > 127) ?
9166 if (logging != MagickFalse && y == 0)
9167 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9168 " Writing row of pixels (1)");
9170 png_write_row(ping,ping_pixels);
9172 if (image->previous == (Image *) NULL)
9174 status=SetImageProgress(image,LoadImageTag,pass,num_passes);
9175 if (status == MagickFalse)
9181 else /* Not Palette, Bilevel, or Opaque Monochrome */
9183 if ((!mng_info->write_png8 && !mng_info->write_png24 &&
9184 !mng_info->write_png32) &&
9185 (image_matte != MagickFalse ||
9186 (ping_bit_depth >= MAGICKCORE_QUANTUM_DEPTH)) &&
9187 (mng_info->IsPalette) && ping_have_color == MagickFalse)
9189 register const PixelPacket
9192 for (pass=0; pass < num_passes; pass++)
9195 for (y=0; y < (ssize_t) image->rows; y++)
9197 p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
9199 if (p == (const PixelPacket *) NULL)
9202 if (ping_color_type == PNG_COLOR_TYPE_GRAY)
9204 if (mng_info->IsPalette)
9205 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9206 quantum_info,GrayQuantum,ping_pixels,&image->exception);
9209 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9210 quantum_info,RedQuantum,ping_pixels,&image->exception);
9212 if (logging != MagickFalse && y == 0)
9213 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9214 " Writing GRAY PNG pixels (2)");
9217 else /* PNG_COLOR_TYPE_GRAY_ALPHA */
9219 if (logging != MagickFalse && y == 0)
9220 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9221 " Writing GRAY_ALPHA PNG pixels (2)");
9223 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9224 quantum_info,GrayAlphaQuantum,ping_pixels,&image->exception);
9227 if (logging != MagickFalse && y == 0)
9228 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9229 " Writing row of pixels (2)");
9231 png_write_row(ping,ping_pixels);
9234 if (image->previous == (Image *) NULL)
9236 status=SetImageProgress(image,LoadImageTag,pass,num_passes);
9237 if (status == MagickFalse)
9245 register const PixelPacket
9248 for (pass=0; pass < num_passes; pass++)
9250 if ((image_depth > 8) || (mng_info->write_png24 ||
9251 mng_info->write_png32 ||
9252 (!mng_info->write_png8 && !mng_info->IsPalette)))
9254 for (y=0; y < (ssize_t) image->rows; y++)
9256 p=GetVirtualPixels(image,0,y,image->columns,1,
9259 if (p == (const PixelPacket *) NULL)
9262 if (ping_color_type == PNG_COLOR_TYPE_GRAY)
9264 if (image->storage_class == DirectClass)
9265 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9266 quantum_info,RedQuantum,ping_pixels,&image->exception);
9269 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9270 quantum_info,GrayQuantum,ping_pixels,&image->exception);
9273 else if (ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
9275 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9276 quantum_info,GrayAlphaQuantum,ping_pixels,
9279 if (logging != MagickFalse && y == 0)
9280 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9281 " Writing GRAY_ALPHA PNG pixels (3)");
9284 else if (image_matte != MagickFalse)
9285 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9286 quantum_info,RGBAQuantum,ping_pixels,&image->exception);
9289 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9290 quantum_info,RGBQuantum,ping_pixels,&image->exception);
9292 if (logging != MagickFalse && y == 0)
9293 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9294 " Writing row of pixels (3)");
9296 png_write_row(ping,ping_pixels);
9301 /* not ((image_depth > 8) || (mng_info->write_png24 ||
9302 mng_info->write_png32 ||
9303 (!mng_info->write_png8 && !mng_info->IsPalette))) */
9305 if ((ping_color_type != PNG_COLOR_TYPE_GRAY) &&
9306 (ping_color_type != PNG_COLOR_TYPE_GRAY_ALPHA))
9308 if (logging != MagickFalse)
9309 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9310 " pass %d, Image Is not GRAY or GRAY_ALPHA",pass);
9312 quantum_info->depth=8;
9316 for (y=0; y < (ssize_t) image->rows; y++)
9318 if (logging != MagickFalse && y == 0)
9319 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9320 " pass %d, Image Is RGB, 16-bit GRAY, or GRAY_ALPHA",pass);
9322 p=GetVirtualPixels(image,0,y,image->columns,1,
9325 if (p == (const PixelPacket *) NULL)
9328 if (ping_color_type == PNG_COLOR_TYPE_GRAY)
9331 quantum_info->depth=ping_bit_depth;
9333 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9334 quantum_info,GrayQuantum,ping_pixels,&image->exception);
9337 else if (ping_color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
9339 if (logging != MagickFalse && y == 0)
9340 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9341 " Writing GRAY_ALPHA PNG pixels (4)");
9343 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9344 quantum_info,GrayAlphaQuantum,ping_pixels,
9352 * This is failing to account for 1, 2, 4-bit depths
9353 * The call to png_set_packing() above is supposed to
9354 * take care of those.
9357 quantum_info->depth=ping_bit_depth;
9360 /* GrayQuantum does not work here */
9361 (void) ExportQuantumPixels(image,(const CacheView *) NULL,
9362 quantum_info,IndexQuantum,ping_pixels,&image->exception);
9364 if (logging != MagickFalse && y <= 2)
9366 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9367 " Writing row of pixels (4)");
9369 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9370 " ping_pixels[0]=%d,ping_pixels[1]=%d",
9371 (int)ping_pixels[0],(int)ping_pixels[1]);
9374 png_write_row(ping,ping_pixels);
9378 if (image->previous == (Image *) NULL)
9380 status=SetImageProgress(image,LoadImageTag,pass,num_passes);
9381 if (status == MagickFalse)
9388 if (quantum_info != (QuantumInfo *) NULL)
9389 quantum_info=DestroyQuantumInfo(quantum_info);
9391 if (logging != MagickFalse)
9393 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9394 " Wrote PNG image data");
9396 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9397 " Width: %.20g",(double) ping_width);
9399 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9400 " Height: %.20g",(double) ping_height);
9402 if (mng_info->write_png_depth)
9404 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9405 " Defined PNG:bit-depth: %d",mng_info->write_png_depth);
9408 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9409 " PNG bit-depth written: %d",ping_bit_depth);
9411 if (mng_info->write_png_colortype)
9413 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9414 " Defined PNG:color-type: %d",mng_info->write_png_colortype-1);
9417 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9418 " PNG color-type written: %d",ping_color_type);
9420 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9421 " PNG Interlace method: %d",ping_interlace_method);
9424 Generate text chunks.
9426 if (ping_exclude_tEXt == MagickFalse || ping_exclude_zTXt == MagickFalse)
9428 ResetImagePropertyIterator(image);
9429 property=GetNextImageProperty(image);
9430 while (property != (const char *) NULL)
9435 value=GetImageProperty(image,property);
9436 if (ping_exclude_pHYs != MagickFalse ||
9437 LocaleCompare(property,"density") != 0 ||
9438 LocaleCompare(property,"units") != 0)
9440 if (value != (const char *) NULL)
9442 text=(png_textp) png_malloc(ping,(png_uint_32) sizeof(png_text));
9443 text[0].key=(char *) property;
9444 text[0].text=(char *) value;
9445 text[0].text_length=strlen(value);
9447 if (ping_exclude_tEXt != MagickFalse)
9448 text[0].compression=PNG_TEXT_COMPRESSION_zTXt;
9450 else if (ping_exclude_zTXt != MagickFalse)
9451 text[0].compression=PNG_TEXT_COMPRESSION_NONE;
9455 text[0].compression=image_info->compression == NoCompression ||
9456 (image_info->compression == UndefinedCompression &&
9457 text[0].text_length < 128) ? PNG_TEXT_COMPRESSION_NONE :
9458 PNG_TEXT_COMPRESSION_zTXt ;
9461 if (logging != MagickFalse)
9463 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9464 " Setting up text chunk");
9466 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9467 " keyword: %s",text[0].key);
9470 png_set_text(ping,ping_info,text,1);
9471 png_free(ping,text);
9474 property=GetNextImageProperty(image);
9478 /* write any PNG-chunk-e profiles */
9479 (void) Magick_png_write_chunk_from_profile(image,"PNG-chunk-e",logging);
9481 if (logging != MagickFalse)
9482 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9483 " Writing PNG end info");
9485 png_write_end(ping,ping_info);
9487 if (mng_info->need_fram && (int) image->dispose == BackgroundDispose)
9489 if (mng_info->page.x || mng_info->page.y ||
9490 (ping_width != mng_info->page.width) ||
9491 (ping_height != mng_info->page.height))
9497 Write FRAM 4 with clipping boundaries followed by FRAM 1.
9499 (void) WriteBlobMSBULong(image,27L); /* data length=27 */
9500 PNGType(chunk,mng_FRAM);
9501 LogPNGChunk(logging,mng_FRAM,27L);
9503 chunk[5]=0; /* frame name separator (no name) */
9504 chunk[6]=1; /* flag for changing delay, for next frame only */
9505 chunk[7]=0; /* flag for changing frame timeout */
9506 chunk[8]=1; /* flag for changing frame clipping for next frame */
9507 chunk[9]=0; /* flag for changing frame sync_id */
9508 PNGLong(chunk+10,(png_uint_32) (0L)); /* temporary 0 delay */
9509 chunk[14]=0; /* clipping boundaries delta type */
9510 PNGLong(chunk+15,(png_uint_32) (mng_info->page.x)); /* left cb */
9512 (png_uint_32) (mng_info->page.x + ping_width));
9513 PNGLong(chunk+23,(png_uint_32) (mng_info->page.y)); /* top cb */
9515 (png_uint_32) (mng_info->page.y + ping_height));
9516 (void) WriteBlob(image,31,chunk);
9517 (void) WriteBlobMSBULong(image,crc32(0,chunk,31));
9518 mng_info->old_framing_mode=4;
9519 mng_info->framing_mode=1;
9523 mng_info->framing_mode=3;
9525 if (mng_info->write_mng && !mng_info->need_fram &&
9526 ((int) image->dispose == 3))
9527 (void) ThrowMagickException(&image->exception,GetMagickModule(),
9528 CoderError,"Cannot convert GIF with disposal method 3 to MNG-LC",
9529 "`%s'",image->filename);
9535 png_destroy_write_struct(&ping,&ping_info);
9537 ping_pixels=(unsigned char *) RelinquishMagickMemory(ping_pixels);
9539 #if defined(PNG_SETJMP_NOT_THREAD_SAFE)
9540 UnlockSemaphoreInfo(ping_semaphore);
9543 if (ping_have_blob != MagickFalse)
9544 (void) CloseBlob(image);
9546 image_info=DestroyImageInfo(image_info);
9547 image=DestroyImage(image);
9549 /* Store bit depth actually written */
9550 s[0]=(char) ping_bit_depth;
9553 (void) SetImageProperty(IMimage,"png:bit-depth-written",s);
9555 if (logging != MagickFalse)
9556 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9557 " exit WriteOnePNGImage()");
9560 /* End write one PNG image */
9564 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
9568 % W r i t e P N G I m a g e %
9572 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
9574 % WritePNGImage() writes a Portable Network Graphics (PNG) or
9575 % Multiple-image Network Graphics (MNG) image file.
9577 % MNG support written by Glenn Randers-Pehrson, glennrp@image...
9579 % The format of the WritePNGImage method is:
9581 % MagickBooleanType WritePNGImage(const ImageInfo *image_info,Image *image)
9583 % A description of each parameter follows:
9585 % o image_info: the image info.
9587 % o image: The image.
9589 % Returns MagickTrue on success, MagickFalse on failure.
9591 % Communicating with the PNG encoder:
9593 % While the datastream written is always in PNG format and normally would
9594 % be given the "png" file extension, this method also writes the following
9595 % pseudo-formats which are subsets of PNG:
9597 % o PNG8: An 8-bit indexed PNG datastream is written. If the image has
9598 % a depth greater than 8, the depth is reduced. If transparency
9599 % is present, the tRNS chunk must only have values 0 and 255
9600 % (i.e., transparency is binary: fully opaque or fully
9601 % transparent). If other values are present they will be
9602 % 50%-thresholded to binary transparency. If more than 256
9603 % colors are present, they will be quantized to the 3-3-2
9604 % palette. If you want better quantization or dithering of
9605 % the colors or alpha, you need to do it before calling the
9606 % PNG encoder. The pixels contain 8-bit indices even if
9607 % they could be represented with 1, 2, or 4 bits. Grayscale
9608 % images will be written as indexed PNG files even though the
9609 % PNG grayscale type might be slightly more efficient. Please
9610 % note that writing to the PNG8 format may result in loss
9611 % of color and alpha data.
9613 % o PNG24: An 8-bit per sample RGB PNG datastream is written. The tRNS
9614 % chunk can be present to convey binary transparency by naming
9615 % one of the colors as transparent. The only loss incurred
9616 % is reduction of sample depth to 8. If the image has more
9617 % than one transparent color, has semitransparent pixels, or
9618 % has an opaque pixel with the same RGB components as the
9619 % transparent color, an image is not written.
9621 % o PNG32: An 8-bit per sample RGBA PNG is written. Partial
9622 % transparency is permitted, i.e., the alpha sample for
9623 % each pixel can have any value from 0 to 255. The alpha
9624 % channel is present even if the image is fully opaque.
9625 % The only loss in data is the reduction of the sample depth
9628 % o -define: For more precise control of the PNG output, you can use the
9629 % Image options "png:bit-depth" and "png:color-type". These
9630 % can be set from the commandline with "-define" and also
9631 % from the application programming interfaces. The options
9632 % are case-independent and are converted to lowercase before
9633 % being passed to this encoder.
9635 % png:color-type can be 0, 2, 3, 4, or 6.
9637 % When png:color-type is 0 (Grayscale), png:bit-depth can
9638 % be 1, 2, 4, 8, or 16.
9640 % When png:color-type is 2 (RGB), png:bit-depth can
9643 % When png:color-type is 3 (Indexed), png:bit-depth can
9644 % be 1, 2, 4, or 8. This refers to the number of bits
9645 % used to store the index. The color samples always have
9646 % bit-depth 8 in indexed PNG files.
9648 % When png:color-type is 4 (Gray-Matte) or 6 (RGB-Matte),
9649 % png:bit-depth can be 8 or 16.
9651 % If the image cannot be written without loss with the requested bit-depth
9652 % and color-type, a PNG file will not be written, and the encoder will
9653 % return MagickFalse.
9655 % Since image encoders should not be responsible for the "heavy lifting",
9656 % the user should make sure that ImageMagick has already reduced the
9657 % image depth and number of colors and limit transparency to binary
9658 % transparency prior to attempting to write the image with depth, color,
9659 % or transparency limitations.
9661 % TODO: Enforce the previous paragraph.
9663 % Note that another definition, "png:bit-depth-written" exists, but it
9664 % is not intended for external use. It is only used internally by the
9665 % PNG encoder to inform the JNG encoder of the depth of the alpha channel.
9667 % It is possible to request that the PNG encoder write previously-formatted
9668 % ancillary chunks in the output PNG file, using the "-profile" commandline
9669 % option as shown below or by setting the profile via a programming
9672 % -profile PNG-chunk-x:<file>
9674 % where x is a location flag and <file> is a file containing the chunk
9675 % name in the first 4 bytes, then a colon (":"), followed by the chunk data.
9676 % This encoder will compute the chunk length and CRC, so those must not
9677 % be included in the file.
9679 % "x" can be "b" (before PLTE), "m" (middle, i.e., between PLTE and IDAT),
9680 % or "e" (end, i.e., after IDAT). If you want to write multiple chunks
9681 % of the same type, then add a short unique string after the "x" to prevent
9682 % subsequent profiles from overwriting the preceding ones, e.g.,
9684 % -profile PNG-chunk-b01:file01 -profile PNG-chunk-b02:file02
9686 % As of version 6.6.6 the following optimizations are always done:
9688 % o 32-bit depth is reduced to 16.
9689 % o 16-bit depth is reduced to 8 if all pixels contain samples whose
9690 % high byte and low byte are identical.
9691 % o Palette is sorted to remove unused entries and to put a
9692 % transparent color first, if BUILD_PNG_PALETTE is defined.
9693 % o Opaque matte channel is removed when writing an indexed PNG.
9694 % o Grayscale images are reduced to 1, 2, or 4 bit depth if
9695 % this can be done without loss and a larger bit depth N was not
9696 % requested via the "-define PNG:bit-depth=N" option.
9697 % o If matte channel is present but only one transparent color is
9698 % present, RGB+tRNS is written instead of RGBA
9699 % o Opaque matte channel is removed (or added, if color-type 4 or 6
9700 % was requested when converting an opaque image).
9702 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
9704 static MagickBooleanType WritePNGImage(const ImageInfo *image_info,
9726 assert(image_info != (const ImageInfo *) NULL);
9727 assert(image_info->signature == MagickSignature);
9728 assert(image != (Image *) NULL);
9729 assert(image->signature == MagickSignature);
9730 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
9731 logging=LogMagickEvent(CoderEvent,GetMagickModule(),"Enter WritePNGImage()");
9733 Allocate a MngInfo structure.
9735 have_mng_structure=MagickFalse;
9736 mng_info=(MngInfo *) AcquireMagickMemory(sizeof(MngInfo));
9738 if (mng_info == (MngInfo *) NULL)
9739 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
9742 Initialize members of the MngInfo structure.
9744 (void) ResetMagickMemory(mng_info,0,sizeof(MngInfo));
9745 mng_info->image=image;
9746 mng_info->equal_backgrounds=MagickTrue;
9747 have_mng_structure=MagickTrue;
9749 /* See if user has requested a specific PNG subformat */
9751 mng_info->write_png8=LocaleCompare(image_info->magick,"PNG8") == 0;
9752 mng_info->write_png24=LocaleCompare(image_info->magick,"PNG24") == 0;
9753 mng_info->write_png32=LocaleCompare(image_info->magick,"PNG32") == 0;
9755 if (mng_info->write_png8)
9757 mng_info->write_png_colortype = /* 3 */ 4;
9758 mng_info->write_png_depth = 8;
9762 if (mng_info->write_png24)
9764 mng_info->write_png_colortype = /* 2 */ 3;
9765 mng_info->write_png_depth = 8;
9768 if (image->matte == MagickTrue)
9769 (void) SetImageType(image,TrueColorMatteType);
9772 (void) SetImageType(image,TrueColorType);
9774 (void) SyncImage(image);
9777 if (mng_info->write_png32)
9779 mng_info->write_png_colortype = /* 6 */ 7;
9780 mng_info->write_png_depth = 8;
9783 if (image->matte == MagickTrue)
9784 (void) SetImageType(image,TrueColorMatteType);
9787 (void) SetImageType(image,TrueColorType);
9789 (void) SyncImage(image);
9792 value=GetImageOption(image_info,"png:bit-depth");
9794 if (value != (char *) NULL)
9796 if (LocaleCompare(value,"1") == 0)
9797 mng_info->write_png_depth = 1;
9799 else if (LocaleCompare(value,"2") == 0)
9800 mng_info->write_png_depth = 2;
9802 else if (LocaleCompare(value,"4") == 0)
9803 mng_info->write_png_depth = 4;
9805 else if (LocaleCompare(value,"8") == 0)
9806 mng_info->write_png_depth = 8;
9808 else if (LocaleCompare(value,"16") == 0)
9809 mng_info->write_png_depth = 16;
9812 (void) ThrowMagickException(&image->exception,
9813 GetMagickModule(),CoderWarning,
9814 "ignoring invalid defined png:bit-depth",
9817 if (logging != MagickFalse)
9818 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9819 " png:bit-depth=%d was defined.\n",mng_info->write_png_depth);
9822 value=GetImageOption(image_info,"png:color-type");
9824 if (value != (char *) NULL)
9826 /* We must store colortype+1 because 0 is a valid colortype */
9827 if (LocaleCompare(value,"0") == 0)
9828 mng_info->write_png_colortype = 1;
9830 else if (LocaleCompare(value,"2") == 0)
9831 mng_info->write_png_colortype = 3;
9833 else if (LocaleCompare(value,"3") == 0)
9834 mng_info->write_png_colortype = 4;
9836 else if (LocaleCompare(value,"4") == 0)
9837 mng_info->write_png_colortype = 5;
9839 else if (LocaleCompare(value,"6") == 0)
9840 mng_info->write_png_colortype = 7;
9843 (void) ThrowMagickException(&image->exception,
9844 GetMagickModule(),CoderWarning,
9845 "ignoring invalid defined png:color-type",
9848 if (logging != MagickFalse)
9849 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9850 " png:color-type=%d was defined.\n",mng_info->write_png_colortype-1);
9853 /* Check for chunks to be excluded:
9855 * The default is to not exclude any known chunks except for any
9856 * listed in the "unused_chunks" array, above.
9858 * Chunks can be listed for exclusion via a "PNG:exclude-chunk"
9859 * define (in the image properties or in the image artifacts)
9860 * or via a mng_info member. For convenience, in addition
9861 * to or instead of a comma-separated list of chunks, the
9862 * "exclude-chunk" string can be simply "all" or "none".
9864 * The exclude-chunk define takes priority over the mng_info.
9866 * A "PNG:include-chunk" define takes priority over both the
9867 * mng_info and the "PNG:exclude-chunk" define. Like the
9868 * "exclude-chunk" string, it can define "all" or "none" as
9869 * well as a comma-separated list. Chunks that are unknown to
9870 * ImageMagick are always excluded, regardless of their "copy-safe"
9871 * status according to the PNG specification, and even if they
9872 * appear in the "include-chunk" list.
9874 * Finally, all chunks listed in the "unused_chunks" array are
9875 * automatically excluded, regardless of the other instructions
9878 * if you exclude sRGB but not gAMA (recommended), then sRGB chunk
9879 * will not be written and the gAMA chunk will only be written if it
9880 * is not between .45 and .46, or approximately (1.0/2.2).
9882 * If you exclude tRNS and the image has transparency, the colortype
9883 * is forced to be 4 or 6 (GRAY_ALPHA or RGB_ALPHA).
9885 * The -strip option causes StripImage() to set the png:include-chunk
9886 * artifact to "none,gama".
9889 mng_info->ping_exclude_bKGD=MagickFalse;
9890 mng_info->ping_exclude_cHRM=MagickFalse;
9891 mng_info->ping_exclude_EXIF=MagickFalse; /* hex-encoded EXIF in zTXt */
9892 mng_info->ping_exclude_gAMA=MagickFalse;
9893 mng_info->ping_exclude_cHRM=MagickFalse;
9894 mng_info->ping_exclude_iCCP=MagickFalse;
9895 /* mng_info->ping_exclude_iTXt=MagickFalse; */
9896 mng_info->ping_exclude_oFFs=MagickFalse;
9897 mng_info->ping_exclude_pHYs=MagickFalse;
9898 mng_info->ping_exclude_sRGB=MagickFalse;
9899 mng_info->ping_exclude_tEXt=MagickFalse;
9900 mng_info->ping_exclude_tRNS=MagickFalse;
9901 mng_info->ping_exclude_vpAg=MagickFalse;
9902 mng_info->ping_exclude_zCCP=MagickFalse; /* hex-encoded iCCP in zTXt */
9903 mng_info->ping_exclude_zTXt=MagickFalse;
9905 excluding=MagickFalse;
9907 for (source=0; source<1; source++)
9911 value=GetImageArtifact(image,"png:exclude-chunk");
9914 value=GetImageArtifact(image,"png:exclude-chunks");
9918 value=GetImageOption(image_info,"png:exclude-chunk");
9921 value=GetImageOption(image_info,"png:exclude-chunks");
9930 excluding=MagickTrue;
9932 if (logging != MagickFalse)
9935 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9936 " png:exclude-chunk=%s found in image artifacts.\n", value);
9938 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
9939 " png:exclude-chunk=%s found in image properties.\n", value);
9944 for (i=0; i<(int) last; i+=5)
9947 if (LocaleNCompare(value+i,"all",3) == 0)
9949 mng_info->ping_exclude_bKGD=MagickTrue;
9950 mng_info->ping_exclude_cHRM=MagickTrue;
9951 mng_info->ping_exclude_EXIF=MagickTrue;
9952 mng_info->ping_exclude_gAMA=MagickTrue;
9953 mng_info->ping_exclude_iCCP=MagickTrue;
9954 /* mng_info->ping_exclude_iTXt=MagickTrue; */
9955 mng_info->ping_exclude_oFFs=MagickTrue;
9956 mng_info->ping_exclude_pHYs=MagickTrue;
9957 mng_info->ping_exclude_sRGB=MagickTrue;
9958 mng_info->ping_exclude_tEXt=MagickTrue;
9959 mng_info->ping_exclude_tRNS=MagickTrue;
9960 mng_info->ping_exclude_vpAg=MagickTrue;
9961 mng_info->ping_exclude_zCCP=MagickTrue;
9962 mng_info->ping_exclude_zTXt=MagickTrue;
9966 if (LocaleNCompare(value+i,"none",4) == 0)
9968 mng_info->ping_exclude_bKGD=MagickFalse;
9969 mng_info->ping_exclude_cHRM=MagickFalse;
9970 mng_info->ping_exclude_EXIF=MagickFalse;
9971 mng_info->ping_exclude_gAMA=MagickFalse;
9972 mng_info->ping_exclude_iCCP=MagickFalse;
9973 /* mng_info->ping_exclude_iTXt=MagickFalse; */
9974 mng_info->ping_exclude_oFFs=MagickFalse;
9975 mng_info->ping_exclude_pHYs=MagickFalse;
9976 mng_info->ping_exclude_sRGB=MagickFalse;
9977 mng_info->ping_exclude_tEXt=MagickFalse;
9978 mng_info->ping_exclude_tRNS=MagickFalse;
9979 mng_info->ping_exclude_vpAg=MagickFalse;
9980 mng_info->ping_exclude_zCCP=MagickFalse;
9981 mng_info->ping_exclude_zTXt=MagickFalse;
9984 if (LocaleNCompare(value+i,"bkgd",4) == 0)
9985 mng_info->ping_exclude_bKGD=MagickTrue;
9987 if (LocaleNCompare(value+i,"chrm",4) == 0)
9988 mng_info->ping_exclude_cHRM=MagickTrue;
9990 if (LocaleNCompare(value+i,"exif",4) == 0)
9991 mng_info->ping_exclude_EXIF=MagickTrue;
9993 if (LocaleNCompare(value+i,"gama",4) == 0)
9994 mng_info->ping_exclude_gAMA=MagickTrue;
9996 if (LocaleNCompare(value+i,"iccp",4) == 0)
9997 mng_info->ping_exclude_iCCP=MagickTrue;
10000 if (LocaleNCompare(value+i,"itxt",4) == 0)
10001 mng_info->ping_exclude_iTXt=MagickTrue;
10004 if (LocaleNCompare(value+i,"gama",4) == 0)
10005 mng_info->ping_exclude_gAMA=MagickTrue;
10007 if (LocaleNCompare(value+i,"offs",4) == 0)
10008 mng_info->ping_exclude_oFFs=MagickTrue;
10010 if (LocaleNCompare(value+i,"phys",4) == 0)
10011 mng_info->ping_exclude_pHYs=MagickTrue;
10013 if (LocaleNCompare(value+i,"srgb",4) == 0)
10014 mng_info->ping_exclude_sRGB=MagickTrue;
10016 if (LocaleNCompare(value+i,"text",4) == 0)
10017 mng_info->ping_exclude_tEXt=MagickTrue;
10019 if (LocaleNCompare(value+i,"trns",4) == 0)
10020 mng_info->ping_exclude_tRNS=MagickTrue;
10022 if (LocaleNCompare(value+i,"vpag",4) == 0)
10023 mng_info->ping_exclude_vpAg=MagickTrue;
10025 if (LocaleNCompare(value+i,"zccp",4) == 0)
10026 mng_info->ping_exclude_zCCP=MagickTrue;
10028 if (LocaleNCompare(value+i,"ztxt",4) == 0)
10029 mng_info->ping_exclude_zTXt=MagickTrue;
10035 for (source=0; source<1; source++)
10039 value=GetImageArtifact(image,"png:include-chunk");
10042 value=GetImageArtifact(image,"png:include-chunks");
10046 value=GetImageOption(image_info,"png:include-chunk");
10049 value=GetImageOption(image_info,"png:include-chunks");
10057 excluding=MagickTrue;
10059 if (logging != MagickFalse)
10062 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10063 " png:include-chunk=%s found in image artifacts.\n", value);
10065 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10066 " png:include-chunk=%s found in image properties.\n", value);
10069 last=strlen(value);
10071 for (i=0; i<(int) last; i+=5)
10073 if (LocaleNCompare(value+i,"all",3) == 0)
10075 mng_info->ping_exclude_bKGD=MagickFalse;
10076 mng_info->ping_exclude_cHRM=MagickFalse;
10077 mng_info->ping_exclude_EXIF=MagickFalse;
10078 mng_info->ping_exclude_gAMA=MagickFalse;
10079 mng_info->ping_exclude_iCCP=MagickFalse;
10080 /* mng_info->ping_exclude_iTXt=MagickFalse; */
10081 mng_info->ping_exclude_oFFs=MagickFalse;
10082 mng_info->ping_exclude_pHYs=MagickFalse;
10083 mng_info->ping_exclude_sRGB=MagickFalse;
10084 mng_info->ping_exclude_tEXt=MagickFalse;
10085 mng_info->ping_exclude_tRNS=MagickFalse;
10086 mng_info->ping_exclude_vpAg=MagickFalse;
10087 mng_info->ping_exclude_zCCP=MagickFalse;
10088 mng_info->ping_exclude_zTXt=MagickFalse;
10092 if (LocaleNCompare(value+i,"none",4) == 0)
10094 mng_info->ping_exclude_bKGD=MagickTrue;
10095 mng_info->ping_exclude_cHRM=MagickTrue;
10096 mng_info->ping_exclude_EXIF=MagickTrue;
10097 mng_info->ping_exclude_gAMA=MagickTrue;
10098 mng_info->ping_exclude_iCCP=MagickTrue;
10099 /* mng_info->ping_exclude_iTXt=MagickTrue; */
10100 mng_info->ping_exclude_oFFs=MagickTrue;
10101 mng_info->ping_exclude_pHYs=MagickTrue;
10102 mng_info->ping_exclude_sRGB=MagickTrue;
10103 mng_info->ping_exclude_tEXt=MagickTrue;
10104 mng_info->ping_exclude_tRNS=MagickTrue;
10105 mng_info->ping_exclude_vpAg=MagickTrue;
10106 mng_info->ping_exclude_zCCP=MagickTrue;
10107 mng_info->ping_exclude_zTXt=MagickTrue;
10110 if (LocaleNCompare(value+i,"bkgd",4) == 0)
10111 mng_info->ping_exclude_bKGD=MagickFalse;
10113 if (LocaleNCompare(value+i,"chrm",4) == 0)
10114 mng_info->ping_exclude_cHRM=MagickFalse;
10116 if (LocaleNCompare(value+i,"exif",4) == 0)
10117 mng_info->ping_exclude_EXIF=MagickFalse;
10119 if (LocaleNCompare(value+i,"gama",4) == 0)
10120 mng_info->ping_exclude_gAMA=MagickFalse;
10122 if (LocaleNCompare(value+i,"iccp",4) == 0)
10123 mng_info->ping_exclude_iCCP=MagickFalse;
10126 if (LocaleNCompare(value+i,"itxt",4) == 0)
10127 mng_info->ping_exclude_iTXt=MagickFalse;
10130 if (LocaleNCompare(value+i,"gama",4) == 0)
10131 mng_info->ping_exclude_gAMA=MagickFalse;
10133 if (LocaleNCompare(value+i,"offs",4) == 0)
10134 mng_info->ping_exclude_oFFs=MagickFalse;
10136 if (LocaleNCompare(value+i,"phys",4) == 0)
10137 mng_info->ping_exclude_pHYs=MagickFalse;
10139 if (LocaleNCompare(value+i,"srgb",4) == 0)
10140 mng_info->ping_exclude_sRGB=MagickFalse;
10142 if (LocaleNCompare(value+i,"text",4) == 0)
10143 mng_info->ping_exclude_tEXt=MagickFalse;
10145 if (LocaleNCompare(value+i,"trns",4) == 0)
10146 mng_info->ping_exclude_tRNS=MagickFalse;
10148 if (LocaleNCompare(value+i,"vpag",4) == 0)
10149 mng_info->ping_exclude_vpAg=MagickFalse;
10151 if (LocaleNCompare(value+i,"zccp",4) == 0)
10152 mng_info->ping_exclude_zCCP=MagickFalse;
10154 if (LocaleNCompare(value+i,"ztxt",4) == 0)
10155 mng_info->ping_exclude_zTXt=MagickFalse;
10161 if (excluding != MagickFalse && logging != MagickFalse)
10163 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10164 " Chunks to be excluded from the output PNG:");
10165 if (mng_info->ping_exclude_bKGD != MagickFalse)
10166 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10168 if (mng_info->ping_exclude_cHRM != MagickFalse)
10169 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10171 if (mng_info->ping_exclude_EXIF != MagickFalse)
10172 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10174 if (mng_info->ping_exclude_gAMA != MagickFalse)
10175 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10177 if (mng_info->ping_exclude_iCCP != MagickFalse)
10178 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10181 if (mng_info->ping_exclude_iTXt != MagickFalse)
10182 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10185 if (mng_info->ping_exclude_oFFs != MagickFalse)
10186 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10188 if (mng_info->ping_exclude_pHYs != MagickFalse)
10189 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10191 if (mng_info->ping_exclude_sRGB != MagickFalse)
10192 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10194 if (mng_info->ping_exclude_tEXt != MagickFalse)
10195 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10197 if (mng_info->ping_exclude_tRNS != MagickFalse)
10198 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10200 if (mng_info->ping_exclude_vpAg != MagickFalse)
10201 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10203 if (mng_info->ping_exclude_zCCP != MagickFalse)
10204 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10206 if (mng_info->ping_exclude_zTXt != MagickFalse)
10207 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10211 mng_info->need_blob = MagickTrue;
10213 status=WriteOnePNGImage(mng_info,image_info,image);
10215 MngInfoFreeStruct(mng_info,&have_mng_structure);
10217 if (logging != MagickFalse)
10218 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"exit WritePNGImage()");
10223 #if defined(JNG_SUPPORTED)
10225 /* Write one JNG image */
10226 static MagickBooleanType WriteOneJNGImage(MngInfo *mng_info,
10227 const ImageInfo *image_info,Image *image)
10248 jng_alpha_compression_method,
10249 jng_alpha_sample_depth,
10256 logging=LogMagickEvent(CoderEvent,GetMagickModule(),
10257 " Enter WriteOneJNGImage()");
10259 blob=(unsigned char *) NULL;
10260 jpeg_image=(Image *) NULL;
10261 jpeg_image_info=(ImageInfo *) NULL;
10264 transparent=image_info->type==GrayscaleMatteType ||
10265 image_info->type==TrueColorMatteType;
10267 jng_alpha_sample_depth=0;
10268 jng_quality=image_info->quality == 0UL ? 75UL : image_info->quality;
10269 jng_alpha_compression_method=0;
10271 if (image->matte != MagickFalse)
10273 /* if any pixels are transparent */
10274 transparent=MagickTrue;
10275 if (image_info->compression==JPEGCompression)
10276 jng_alpha_compression_method=8;
10283 /* Create JPEG blob, image, and image_info */
10284 if (logging != MagickFalse)
10285 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10286 " Creating jpeg_image_info for opacity.");
10288 jpeg_image_info=(ImageInfo *) CloneImageInfo(image_info);
10290 if (jpeg_image_info == (ImageInfo *) NULL)
10291 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
10293 if (logging != MagickFalse)
10294 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10295 " Creating jpeg_image.");
10297 jpeg_image=CloneImage(image,0,0,MagickTrue,&image->exception);
10299 if (jpeg_image == (Image *) NULL)
10300 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
10302 (void) CopyMagickString(jpeg_image->magick,"JPEG",MaxTextExtent);
10303 status=SeparateImageChannel(jpeg_image,OpacityChannel);
10304 status=NegateImage(jpeg_image,MagickFalse);
10305 jpeg_image->matte=MagickFalse;
10307 if (jng_quality >= 1000)
10308 jpeg_image_info->quality=jng_quality/1000;
10311 jpeg_image_info->quality=jng_quality;
10313 jpeg_image_info->type=GrayscaleType;
10314 (void) SetImageType(jpeg_image,GrayscaleType);
10315 (void) AcquireUniqueFilename(jpeg_image->filename);
10316 (void) FormatMagickString(jpeg_image_info->filename,MaxTextExtent,
10317 "%s",jpeg_image->filename);
10320 /* To do: check bit depth of PNG alpha channel */
10322 /* Check if image is grayscale. */
10323 if (image_info->type != TrueColorMatteType && image_info->type !=
10324 TrueColorType && ImageIsGray(image))
10329 if (jng_alpha_compression_method==0)
10334 /* Encode opacity as a grayscale PNG blob */
10335 status=OpenBlob(jpeg_image_info,jpeg_image,WriteBinaryBlobMode,
10336 &image->exception);
10337 if (logging != MagickFalse)
10338 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10339 " Creating PNG blob.");
10342 (void) CopyMagickString(jpeg_image_info->magick,"PNG",MaxTextExtent);
10343 (void) CopyMagickString(jpeg_image->magick,"PNG",MaxTextExtent);
10344 jpeg_image_info->interlace=NoInterlace;
10346 blob=ImageToBlob(jpeg_image_info,jpeg_image,&length,
10347 &image->exception);
10349 /* Retrieve sample depth used */
10350 value=GetImageProperty(jpeg_image,"png:bit-depth-written");
10351 if (value != (char *) NULL)
10352 jng_alpha_sample_depth= (unsigned int) value[0];
10356 /* Encode opacity as a grayscale JPEG blob */
10358 status=OpenBlob(jpeg_image_info,jpeg_image,WriteBinaryBlobMode,
10359 &image->exception);
10361 (void) CopyMagickString(jpeg_image_info->magick,"JPEG",MaxTextExtent);
10362 (void) CopyMagickString(jpeg_image->magick,"JPEG",MaxTextExtent);
10363 jpeg_image_info->interlace=NoInterlace;
10364 if (logging != MagickFalse)
10365 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10366 " Creating blob.");
10367 blob=ImageToBlob(jpeg_image_info,jpeg_image,&length,
10368 &image->exception);
10369 jng_alpha_sample_depth=8;
10371 if (logging != MagickFalse)
10372 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10373 " Successfully read jpeg_image into a blob, length=%.20g.",
10377 /* Destroy JPEG image and image_info */
10378 jpeg_image=DestroyImage(jpeg_image);
10379 (void) RelinquishUniqueFileResource(jpeg_image_info->filename);
10380 jpeg_image_info=DestroyImageInfo(jpeg_image_info);
10383 /* Write JHDR chunk */
10384 (void) WriteBlobMSBULong(image,16L); /* chunk data length=16 */
10385 PNGType(chunk,mng_JHDR);
10386 LogPNGChunk(logging,mng_JHDR,16L);
10387 PNGLong(chunk+4,(png_uint_32) image->columns);
10388 PNGLong(chunk+8,(png_uint_32) image->rows);
10389 chunk[12]=jng_color_type;
10390 chunk[13]=8; /* sample depth */
10391 chunk[14]=8; /*jng_image_compression_method */
10392 chunk[15]=(unsigned char) (image_info->interlace == NoInterlace ? 0 : 8);
10393 chunk[16]=jng_alpha_sample_depth;
10394 chunk[17]=jng_alpha_compression_method;
10395 chunk[18]=0; /*jng_alpha_filter_method */
10396 chunk[19]=0; /*jng_alpha_interlace_method */
10397 (void) WriteBlob(image,20,chunk);
10398 (void) WriteBlobMSBULong(image,crc32(0,chunk,20));
10399 if (logging != MagickFalse)
10401 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10402 " JNG width:%15lu",(unsigned long) image->columns);
10404 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10405 " JNG height:%14lu",(unsigned long) image->rows);
10407 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10408 " JNG color type:%10d",jng_color_type);
10410 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10411 " JNG sample depth:%8d",8);
10413 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10414 " JNG compression:%9d",8);
10416 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10417 " JNG interlace:%11d",0);
10419 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10420 " JNG alpha depth:%9d",jng_alpha_sample_depth);
10422 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10423 " JNG alpha compression:%3d",jng_alpha_compression_method);
10425 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10426 " JNG alpha filter:%8d",0);
10428 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10429 " JNG alpha interlace:%5d",0);
10432 /* Write any JNG-chunk-b profiles */
10433 (void) Magick_png_write_chunk_from_profile(image,"JNG-chunk-b",logging);
10436 Write leading ancillary chunks
10442 Write JNG bKGD chunk
10453 if (jng_color_type == 8 || jng_color_type == 12)
10457 (void) WriteBlobMSBULong(image,(size_t) (num_bytes-4L));
10458 PNGType(chunk,mng_bKGD);
10459 LogPNGChunk(logging,mng_bKGD,(size_t) (num_bytes-4L));
10460 red=ScaleQuantumToChar(image->background_color.red);
10461 green=ScaleQuantumToChar(image->background_color.green);
10462 blue=ScaleQuantumToChar(image->background_color.blue);
10469 (void) WriteBlob(image,(size_t) num_bytes,chunk);
10470 (void) WriteBlobMSBULong(image,crc32(0,chunk,(uInt) num_bytes));
10473 if ((image->colorspace == sRGBColorspace || image->rendering_intent))
10476 Write JNG sRGB chunk
10478 (void) WriteBlobMSBULong(image,1L);
10479 PNGType(chunk,mng_sRGB);
10480 LogPNGChunk(logging,mng_sRGB,1L);
10482 if (image->rendering_intent != UndefinedIntent)
10483 chunk[4]=(unsigned char)
10484 Magick_RenderingIntent_to_PNG_RenderingIntent(
10485 (image->rendering_intent));
10488 chunk[4]=(unsigned char)
10489 Magick_RenderingIntent_to_PNG_RenderingIntent(
10490 (PerceptualIntent));
10492 (void) WriteBlob(image,5,chunk);
10493 (void) WriteBlobMSBULong(image,crc32(0,chunk,5));
10497 if (image->gamma != 0.0)
10500 Write JNG gAMA chunk
10502 (void) WriteBlobMSBULong(image,4L);
10503 PNGType(chunk,mng_gAMA);
10504 LogPNGChunk(logging,mng_gAMA,4L);
10505 PNGLong(chunk+4,(png_uint_32) (100000*image->gamma+0.5));
10506 (void) WriteBlob(image,8,chunk);
10507 (void) WriteBlobMSBULong(image,crc32(0,chunk,8));
10510 if ((mng_info->equal_chrms == MagickFalse) &&
10511 (image->chromaticity.red_primary.x != 0.0))
10517 Write JNG cHRM chunk
10519 (void) WriteBlobMSBULong(image,32L);
10520 PNGType(chunk,mng_cHRM);
10521 LogPNGChunk(logging,mng_cHRM,32L);
10522 primary=image->chromaticity.white_point;
10523 PNGLong(chunk+4,(png_uint_32) (100000*primary.x+0.5));
10524 PNGLong(chunk+8,(png_uint_32) (100000*primary.y+0.5));
10525 primary=image->chromaticity.red_primary;
10526 PNGLong(chunk+12,(png_uint_32) (100000*primary.x+0.5));
10527 PNGLong(chunk+16,(png_uint_32) (100000*primary.y+0.5));
10528 primary=image->chromaticity.green_primary;
10529 PNGLong(chunk+20,(png_uint_32) (100000*primary.x+0.5));
10530 PNGLong(chunk+24,(png_uint_32) (100000*primary.y+0.5));
10531 primary=image->chromaticity.blue_primary;
10532 PNGLong(chunk+28,(png_uint_32) (100000*primary.x+0.5));
10533 PNGLong(chunk+32,(png_uint_32) (100000*primary.y+0.5));
10534 (void) WriteBlob(image,36,chunk);
10535 (void) WriteBlobMSBULong(image,crc32(0,chunk,36));
10539 if (image->x_resolution && image->y_resolution && !mng_info->equal_physs)
10542 Write JNG pHYs chunk
10544 (void) WriteBlobMSBULong(image,9L);
10545 PNGType(chunk,mng_pHYs);
10546 LogPNGChunk(logging,mng_pHYs,9L);
10547 if (image->units == PixelsPerInchResolution)
10549 PNGLong(chunk+4,(png_uint_32)
10550 (image->x_resolution*100.0/2.54+0.5));
10552 PNGLong(chunk+8,(png_uint_32)
10553 (image->y_resolution*100.0/2.54+0.5));
10560 if (image->units == PixelsPerCentimeterResolution)
10562 PNGLong(chunk+4,(png_uint_32)
10563 (image->x_resolution*100.0+0.5));
10565 PNGLong(chunk+8,(png_uint_32)
10566 (image->y_resolution*100.0+0.5));
10573 PNGLong(chunk+4,(png_uint_32) (image->x_resolution+0.5));
10574 PNGLong(chunk+8,(png_uint_32) (image->y_resolution+0.5));
10578 (void) WriteBlob(image,13,chunk);
10579 (void) WriteBlobMSBULong(image,crc32(0,chunk,13));
10582 if (mng_info->write_mng == 0 && (image->page.x || image->page.y))
10585 Write JNG oFFs chunk
10587 (void) WriteBlobMSBULong(image,9L);
10588 PNGType(chunk,mng_oFFs);
10589 LogPNGChunk(logging,mng_oFFs,9L);
10590 PNGsLong(chunk+4,(ssize_t) (image->page.x));
10591 PNGsLong(chunk+8,(ssize_t) (image->page.y));
10593 (void) WriteBlob(image,13,chunk);
10594 (void) WriteBlobMSBULong(image,crc32(0,chunk,13));
10596 if (mng_info->write_mng == 0 && (image->page.width || image->page.height))
10598 (void) WriteBlobMSBULong(image,9L); /* data length=8 */
10599 PNGType(chunk,mng_vpAg);
10600 LogPNGChunk(logging,mng_vpAg,9L);
10601 PNGLong(chunk+4,(png_uint_32) image->page.width);
10602 PNGLong(chunk+8,(png_uint_32) image->page.height);
10603 chunk[12]=0; /* unit = pixels */
10604 (void) WriteBlob(image,13,chunk);
10605 (void) WriteBlobMSBULong(image,crc32(0,chunk,13));
10611 if (jng_alpha_compression_method==0)
10619 /* Write IDAT chunk header */
10620 if (logging != MagickFalse)
10621 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10622 " Write IDAT chunks from blob, length=%.20g.",(double)
10625 /* Copy IDAT chunks */
10628 for (i=8; i<(ssize_t) length; i+=len+12)
10630 len=(*p<<24)|((*(p+1))<<16)|((*(p+2))<<8)|(*(p+3));
10633 if (*(p)==73 && *(p+1)==68 && *(p+2)==65 && *(p+3)==84) /* IDAT */
10635 /* Found an IDAT chunk. */
10636 (void) WriteBlobMSBULong(image,(size_t) len);
10637 LogPNGChunk(logging,mng_IDAT,(size_t) len);
10638 (void) WriteBlob(image,(size_t) len+4,p);
10639 (void) WriteBlobMSBULong(image,
10640 crc32(0,p,(uInt) len+4));
10645 if (logging != MagickFalse)
10646 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10647 " Skipping %c%c%c%c chunk, length=%.20g.",
10648 *(p),*(p+1),*(p+2),*(p+3),(double) len);
10655 /* Write JDAA chunk header */
10656 if (logging != MagickFalse)
10657 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10658 " Write JDAA chunk, length=%.20g.",(double) length);
10659 (void) WriteBlobMSBULong(image,(size_t) length);
10660 PNGType(chunk,mng_JDAA);
10661 LogPNGChunk(logging,mng_JDAA,length);
10662 /* Write JDAT chunk(s) data */
10663 (void) WriteBlob(image,4,chunk);
10664 (void) WriteBlob(image,length,blob);
10665 (void) WriteBlobMSBULong(image,crc32(crc32(0,chunk,4),blob,
10668 blob=(unsigned char *) RelinquishMagickMemory(blob);
10671 /* Encode image as a JPEG blob */
10672 if (logging != MagickFalse)
10673 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10674 " Creating jpeg_image_info.");
10675 jpeg_image_info=(ImageInfo *) CloneImageInfo(image_info);
10676 if (jpeg_image_info == (ImageInfo *) NULL)
10677 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
10679 if (logging != MagickFalse)
10680 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10681 " Creating jpeg_image.");
10683 jpeg_image=CloneImage(image,0,0,MagickTrue,&image->exception);
10684 if (jpeg_image == (Image *) NULL)
10685 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
10686 (void) CopyMagickString(jpeg_image->magick,"JPEG",MaxTextExtent);
10688 (void) AcquireUniqueFilename(jpeg_image->filename);
10689 (void) FormatMagickString(jpeg_image_info->filename,MaxTextExtent,"%s",
10690 jpeg_image->filename);
10692 status=OpenBlob(jpeg_image_info,jpeg_image,WriteBinaryBlobMode,
10693 &image->exception);
10695 if (logging != MagickFalse)
10696 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10697 " Created jpeg_image, %.20g x %.20g.",(double) jpeg_image->columns,
10698 (double) jpeg_image->rows);
10700 if (jng_color_type == 8 || jng_color_type == 12)
10701 jpeg_image_info->type=GrayscaleType;
10703 jpeg_image_info->quality=jng_quality % 1000;
10704 (void) CopyMagickString(jpeg_image_info->magick,"JPEG",MaxTextExtent);
10705 (void) CopyMagickString(jpeg_image->magick,"JPEG",MaxTextExtent);
10707 if (logging != MagickFalse)
10708 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10709 " Creating blob.");
10711 blob=ImageToBlob(jpeg_image_info,jpeg_image,&length,&image->exception);
10713 if (logging != MagickFalse)
10715 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10716 " Successfully read jpeg_image into a blob, length=%.20g.",
10719 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10720 " Write JDAT chunk, length=%.20g.",(double) length);
10723 /* Write JDAT chunk(s) */
10724 (void) WriteBlobMSBULong(image,(size_t) length);
10725 PNGType(chunk,mng_JDAT);
10726 LogPNGChunk(logging,mng_JDAT,length);
10727 (void) WriteBlob(image,4,chunk);
10728 (void) WriteBlob(image,length,blob);
10729 (void) WriteBlobMSBULong(image,crc32(crc32(0,chunk,4),blob,(uInt) length));
10731 jpeg_image=DestroyImage(jpeg_image);
10732 (void) RelinquishUniqueFileResource(jpeg_image_info->filename);
10733 jpeg_image_info=DestroyImageInfo(jpeg_image_info);
10734 blob=(unsigned char *) RelinquishMagickMemory(blob);
10736 /* Write any JNG-chunk-e profiles */
10737 (void) Magick_png_write_chunk_from_profile(image,"JNG-chunk-e",logging);
10739 /* Write IEND chunk */
10740 (void) WriteBlobMSBULong(image,0L);
10741 PNGType(chunk,mng_IEND);
10742 LogPNGChunk(logging,mng_IEND,0);
10743 (void) WriteBlob(image,4,chunk);
10744 (void) WriteBlobMSBULong(image,crc32(0,chunk,4));
10746 if (logging != MagickFalse)
10747 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10748 " exit WriteOneJNGImage()");
10755 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
10759 % W r i t e J N G I m a g e %
10763 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
10765 % WriteJNGImage() writes a JPEG Network Graphics (JNG) image file.
10767 % JNG support written by Glenn Randers-Pehrson, glennrp@image...
10769 % The format of the WriteJNGImage method is:
10771 % MagickBooleanType WriteJNGImage(const ImageInfo *image_info,Image *image)
10773 % A description of each parameter follows:
10775 % o image_info: the image info.
10777 % o image: The image.
10779 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
10781 static MagickBooleanType WriteJNGImage(const ImageInfo *image_info,Image *image)
10784 have_mng_structure,
10794 assert(image_info != (const ImageInfo *) NULL);
10795 assert(image_info->signature == MagickSignature);
10796 assert(image != (Image *) NULL);
10797 assert(image->signature == MagickSignature);
10798 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
10799 logging=LogMagickEvent(CoderEvent,GetMagickModule(),"Enter WriteJNGImage()");
10800 status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
10801 if (status == MagickFalse)
10805 Allocate a MngInfo structure.
10807 have_mng_structure=MagickFalse;
10808 mng_info=(MngInfo *) AcquireMagickMemory(sizeof(MngInfo));
10809 if (mng_info == (MngInfo *) NULL)
10810 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
10812 Initialize members of the MngInfo structure.
10814 (void) ResetMagickMemory(mng_info,0,sizeof(MngInfo));
10815 mng_info->image=image;
10816 have_mng_structure=MagickTrue;
10818 (void) WriteBlob(image,8,(const unsigned char *) "\213JNG\r\n\032\n");
10820 status=WriteOneJNGImage(mng_info,image_info,image);
10821 (void) CloseBlob(image);
10823 (void) CatchImageException(image);
10824 MngInfoFreeStruct(mng_info,&have_mng_structure);
10825 if (logging != MagickFalse)
10826 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"exit WriteJNGImage()");
10833 static MagickBooleanType WriteMNGImage(const ImageInfo *image_info,Image *image)
10842 have_mng_structure,
10845 volatile MagickBooleanType
10857 #if defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) || \
10858 defined(PNG_MNG_FEATURES_SUPPORTED)
10861 all_images_are_gray,
10871 volatile unsigned int
10882 #if (PNG_LIBPNG_VER < 10200)
10883 if (image_info->verbose)
10884 printf("Your PNG library (libpng-%s) is rather old.\n",
10885 PNG_LIBPNG_VER_STRING);
10891 assert(image_info != (const ImageInfo *) NULL);
10892 assert(image_info->signature == MagickSignature);
10893 assert(image != (Image *) NULL);
10894 assert(image->signature == MagickSignature);
10895 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
10896 logging=LogMagickEvent(CoderEvent,GetMagickModule(),"Enter WriteMNGImage()");
10897 status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
10898 if (status == MagickFalse)
10902 Allocate a MngInfo structure.
10904 have_mng_structure=MagickFalse;
10905 mng_info=(MngInfo *) AcquireMagickMemory(sizeof(MngInfo));
10906 if (mng_info == (MngInfo *) NULL)
10907 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
10909 Initialize members of the MngInfo structure.
10911 (void) ResetMagickMemory(mng_info,0,sizeof(MngInfo));
10912 mng_info->image=image;
10913 have_mng_structure=MagickTrue;
10914 write_mng=LocaleCompare(image_info->magick,"MNG") == 0;
10917 * See if user has requested a specific PNG subformat to be used
10918 * for all of the PNGs in the MNG being written, e.g.,
10920 * convert *.png png8:animation.mng
10922 * To do: check -define png:bit_depth and png:color_type as well,
10923 * or perhaps use mng:bit_depth and mng:color_type instead for
10927 mng_info->write_png8=LocaleCompare(image_info->magick,"PNG8") == 0;
10928 mng_info->write_png24=LocaleCompare(image_info->magick,"PNG24") == 0;
10929 mng_info->write_png32=LocaleCompare(image_info->magick,"PNG32") == 0;
10931 write_jng=MagickFalse;
10932 if (image_info->compression == JPEGCompression)
10933 write_jng=MagickTrue;
10935 mng_info->adjoin=image_info->adjoin &&
10936 (GetNextImageInList(image) != (Image *) NULL) && write_mng;
10938 if (logging != MagickFalse)
10940 /* Log some info about the input */
10944 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10945 " Checking input image(s)");
10947 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10948 " Image_info depth: %.20g",(double) image_info->depth);
10950 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10951 " Type: %d",image_info->type);
10954 for (p=image; p != (Image *) NULL; p=GetNextImageInList(p))
10956 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10957 " Scene: %.20g",(double) scene++);
10959 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10960 " Image depth: %.20g",(double) p->depth);
10963 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10967 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10970 if (p->storage_class == PseudoClass)
10971 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10972 " Storage class: PseudoClass");
10975 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10976 " Storage class: DirectClass");
10979 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10980 " Number of colors: %.20g",(double) p->colors);
10983 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
10984 " Number of colors: unspecified");
10986 if (mng_info->adjoin == MagickFalse)
10991 use_global_plte=MagickFalse;
10992 all_images_are_gray=MagickFalse;
10993 #ifdef PNG_WRITE_EMPTY_PLTE_SUPPORTED
10994 need_local_plte=MagickTrue;
10996 need_defi=MagickFalse;
10997 need_matte=MagickFalse;
10998 mng_info->framing_mode=1;
10999 mng_info->old_framing_mode=1;
11002 if (image_info->page != (char *) NULL)
11005 Determine image bounding box.
11007 SetGeometry(image,&mng_info->page);
11008 (void) ParseMetaGeometry(image_info->page,&mng_info->page.x,
11009 &mng_info->page.y,&mng_info->page.width,&mng_info->page.height);
11021 mng_info->page=image->page;
11022 need_geom=MagickTrue;
11023 if (mng_info->page.width || mng_info->page.height)
11024 need_geom=MagickFalse;
11026 Check all the scenes.
11028 initial_delay=image->delay;
11029 need_iterations=MagickFalse;
11030 mng_info->equal_chrms=image->chromaticity.red_primary.x != 0.0;
11031 mng_info->equal_physs=MagickTrue,
11032 mng_info->equal_gammas=MagickTrue;
11033 mng_info->equal_srgbs=MagickTrue;
11034 mng_info->equal_backgrounds=MagickTrue;
11036 #if defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) || \
11037 defined(PNG_MNG_FEATURES_SUPPORTED)
11038 all_images_are_gray=MagickTrue;
11039 mng_info->equal_palettes=MagickFalse;
11040 need_local_plte=MagickFalse;
11042 for (next_image=image; next_image != (Image *) NULL; )
11046 if ((next_image->columns+next_image->page.x) > mng_info->page.width)
11047 mng_info->page.width=next_image->columns+next_image->page.x;
11049 if ((next_image->rows+next_image->page.y) > mng_info->page.height)
11050 mng_info->page.height=next_image->rows+next_image->page.y;
11053 if (next_image->page.x || next_image->page.y)
11054 need_defi=MagickTrue;
11056 if (next_image->matte)
11057 need_matte=MagickTrue;
11059 if ((int) next_image->dispose >= BackgroundDispose)
11060 if (next_image->matte || next_image->page.x || next_image->page.y ||
11061 ((next_image->columns < mng_info->page.width) &&
11062 (next_image->rows < mng_info->page.height)))
11063 mng_info->need_fram=MagickTrue;
11065 if (next_image->iterations)
11066 need_iterations=MagickTrue;
11068 final_delay=next_image->delay;
11070 if (final_delay != initial_delay || final_delay > 1UL*
11071 next_image->ticks_per_second)
11072 mng_info->need_fram=1;
11074 #if defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) || \
11075 defined(PNG_MNG_FEATURES_SUPPORTED)
11077 check for global palette possibility.
11079 if (image->matte != MagickFalse)
11080 need_local_plte=MagickTrue;
11082 if (need_local_plte == 0)
11084 if (ImageIsGray(image) == MagickFalse)
11085 all_images_are_gray=MagickFalse;
11086 mng_info->equal_palettes=PalettesAreEqual(image,next_image);
11087 if (use_global_plte == 0)
11088 use_global_plte=mng_info->equal_palettes;
11089 need_local_plte=!mng_info->equal_palettes;
11092 if (GetNextImageInList(next_image) != (Image *) NULL)
11094 if (next_image->background_color.red !=
11095 next_image->next->background_color.red ||
11096 next_image->background_color.green !=
11097 next_image->next->background_color.green ||
11098 next_image->background_color.blue !=
11099 next_image->next->background_color.blue)
11100 mng_info->equal_backgrounds=MagickFalse;
11102 if (next_image->gamma != next_image->next->gamma)
11103 mng_info->equal_gammas=MagickFalse;
11105 if (next_image->rendering_intent !=
11106 next_image->next->rendering_intent)
11107 mng_info->equal_srgbs=MagickFalse;
11109 if ((next_image->units != next_image->next->units) ||
11110 (next_image->x_resolution != next_image->next->x_resolution) ||
11111 (next_image->y_resolution != next_image->next->y_resolution))
11112 mng_info->equal_physs=MagickFalse;
11114 if (mng_info->equal_chrms)
11116 if (next_image->chromaticity.red_primary.x !=
11117 next_image->next->chromaticity.red_primary.x ||
11118 next_image->chromaticity.red_primary.y !=
11119 next_image->next->chromaticity.red_primary.y ||
11120 next_image->chromaticity.green_primary.x !=
11121 next_image->next->chromaticity.green_primary.x ||
11122 next_image->chromaticity.green_primary.y !=
11123 next_image->next->chromaticity.green_primary.y ||
11124 next_image->chromaticity.blue_primary.x !=
11125 next_image->next->chromaticity.blue_primary.x ||
11126 next_image->chromaticity.blue_primary.y !=
11127 next_image->next->chromaticity.blue_primary.y ||
11128 next_image->chromaticity.white_point.x !=
11129 next_image->next->chromaticity.white_point.x ||
11130 next_image->chromaticity.white_point.y !=
11131 next_image->next->chromaticity.white_point.y)
11132 mng_info->equal_chrms=MagickFalse;
11136 next_image=GetNextImageInList(next_image);
11138 if (image_count < 2)
11140 mng_info->equal_backgrounds=MagickFalse;
11141 mng_info->equal_chrms=MagickFalse;
11142 mng_info->equal_gammas=MagickFalse;
11143 mng_info->equal_srgbs=MagickFalse;
11144 mng_info->equal_physs=MagickFalse;
11145 use_global_plte=MagickFalse;
11146 #ifdef PNG_WRITE_EMPTY_PLTE_SUPPORTED
11147 need_local_plte=MagickTrue;
11149 need_iterations=MagickFalse;
11152 if (mng_info->need_fram == MagickFalse)
11155 Only certain framing rates 100/n are exactly representable without
11156 the FRAM chunk but we'll allow some slop in VLC files
11158 if (final_delay == 0)
11160 if (need_iterations != MagickFalse)
11163 It's probably a GIF with loop; don't run it *too* fast.
11165 if (mng_info->adjoin)
11168 (void) ThrowMagickException(&image->exception,
11169 GetMagickModule(),CoderWarning,
11170 "input has zero delay between all frames; assuming",
11175 mng_info->ticks_per_second=0;
11177 if (final_delay != 0)
11178 mng_info->ticks_per_second=(png_uint_32)
11179 (image->ticks_per_second/final_delay);
11180 if (final_delay > 50)
11181 mng_info->ticks_per_second=2;
11183 if (final_delay > 75)
11184 mng_info->ticks_per_second=1;
11186 if (final_delay > 125)
11187 mng_info->need_fram=MagickTrue;
11189 if (need_defi && final_delay > 2 && (final_delay != 4) &&
11190 (final_delay != 5) && (final_delay != 10) && (final_delay != 20) &&
11191 (final_delay != 25) && (final_delay != 50) && (final_delay !=
11192 1UL*image->ticks_per_second))
11193 mng_info->need_fram=MagickTrue; /* make it exact; cannot be VLC */
11196 if (mng_info->need_fram != MagickFalse)
11197 mng_info->ticks_per_second=1UL*image->ticks_per_second;
11199 If pseudocolor, we should also check to see if all the
11200 palettes are identical and write a global PLTE if they are.
11204 Write the MNG version 1.0 signature and MHDR chunk.
11206 (void) WriteBlob(image,8,(const unsigned char *) "\212MNG\r\n\032\n");
11207 (void) WriteBlobMSBULong(image,28L); /* chunk data length=28 */
11208 PNGType(chunk,mng_MHDR);
11209 LogPNGChunk(logging,mng_MHDR,28L);
11210 PNGLong(chunk+4,(png_uint_32) mng_info->page.width);
11211 PNGLong(chunk+8,(png_uint_32) mng_info->page.height);
11212 PNGLong(chunk+12,mng_info->ticks_per_second);
11213 PNGLong(chunk+16,0L); /* layer count=unknown */
11214 PNGLong(chunk+20,0L); /* frame count=unknown */
11215 PNGLong(chunk+24,0L); /* play time=unknown */
11220 if (need_defi || mng_info->need_fram || use_global_plte)
11221 PNGLong(chunk+28,27L); /* simplicity=LC+JNG */
11224 PNGLong(chunk+28,25L); /* simplicity=VLC+JNG */
11229 if (need_defi || mng_info->need_fram || use_global_plte)
11230 PNGLong(chunk+28,19L); /* simplicity=LC+JNG, no transparency */
11233 PNGLong(chunk+28,17L); /* simplicity=VLC+JNG, no transparency */
11241 if (need_defi || mng_info->need_fram || use_global_plte)
11242 PNGLong(chunk+28,11L); /* simplicity=LC */
11245 PNGLong(chunk+28,9L); /* simplicity=VLC */
11250 if (need_defi || mng_info->need_fram || use_global_plte)
11251 PNGLong(chunk+28,3L); /* simplicity=LC, no transparency */
11254 PNGLong(chunk+28,1L); /* simplicity=VLC, no transparency */
11257 (void) WriteBlob(image,32,chunk);
11258 (void) WriteBlobMSBULong(image,crc32(0,chunk,32));
11259 option=GetImageOption(image_info,"mng:need-cacheoff");
11260 if (option != (const char *) NULL)
11266 Write "nEED CACHEOFF" to turn playback caching off for streaming MNG.
11268 PNGType(chunk,mng_nEED);
11269 length=CopyMagickString((char *) chunk+4,"CACHEOFF",20);
11270 (void) WriteBlobMSBULong(image,(size_t) length);
11271 LogPNGChunk(logging,mng_nEED,(size_t) length);
11273 (void) WriteBlob(image,length,chunk);
11274 (void) WriteBlobMSBULong(image,crc32(0,chunk,(uInt) length));
11276 if ((GetPreviousImageInList(image) == (Image *) NULL) &&
11277 (GetNextImageInList(image) != (Image *) NULL) &&
11278 (image->iterations != 1))
11281 Write MNG TERM chunk
11283 (void) WriteBlobMSBULong(image,10L); /* data length=10 */
11284 PNGType(chunk,mng_TERM);
11285 LogPNGChunk(logging,mng_TERM,10L);
11286 chunk[4]=3; /* repeat animation */
11287 chunk[5]=0; /* show last frame when done */
11288 PNGLong(chunk+6,(png_uint_32) (mng_info->ticks_per_second*
11289 final_delay/MagickMax(image->ticks_per_second,1)));
11291 if (image->iterations == 0)
11292 PNGLong(chunk+10,PNG_UINT_31_MAX);
11295 PNGLong(chunk+10,(png_uint_32) image->iterations);
11297 if (logging != MagickFalse)
11299 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
11300 " TERM delay: %.20g",(double) (mng_info->ticks_per_second*
11301 final_delay/MagickMax(image->ticks_per_second,1)));
11303 if (image->iterations == 0)
11304 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
11305 " TERM iterations: %.20g",(double) PNG_UINT_31_MAX);
11308 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
11309 " Image iterations: %.20g",(double) image->iterations);
11311 (void) WriteBlob(image,14,chunk);
11312 (void) WriteBlobMSBULong(image,crc32(0,chunk,14));
11315 To do: check for cHRM+gAMA == sRGB, and write sRGB instead.
11317 if ((image->colorspace == sRGBColorspace || image->rendering_intent) &&
11318 mng_info->equal_srgbs)
11321 Write MNG sRGB chunk
11323 (void) WriteBlobMSBULong(image,1L);
11324 PNGType(chunk,mng_sRGB);
11325 LogPNGChunk(logging,mng_sRGB,1L);
11327 if (image->rendering_intent != UndefinedIntent)
11328 chunk[4]=(unsigned char)
11329 Magick_RenderingIntent_to_PNG_RenderingIntent(
11330 (image->rendering_intent));
11333 chunk[4]=(unsigned char)
11334 Magick_RenderingIntent_to_PNG_RenderingIntent(
11335 (PerceptualIntent));
11337 (void) WriteBlob(image,5,chunk);
11338 (void) WriteBlobMSBULong(image,crc32(0,chunk,5));
11339 mng_info->have_write_global_srgb=MagickTrue;
11344 if (image->gamma && mng_info->equal_gammas)
11347 Write MNG gAMA chunk
11349 (void) WriteBlobMSBULong(image,4L);
11350 PNGType(chunk,mng_gAMA);
11351 LogPNGChunk(logging,mng_gAMA,4L);
11352 PNGLong(chunk+4,(png_uint_32) (100000*image->gamma+0.5));
11353 (void) WriteBlob(image,8,chunk);
11354 (void) WriteBlobMSBULong(image,crc32(0,chunk,8));
11355 mng_info->have_write_global_gama=MagickTrue;
11357 if (mng_info->equal_chrms)
11363 Write MNG cHRM chunk
11365 (void) WriteBlobMSBULong(image,32L);
11366 PNGType(chunk,mng_cHRM);
11367 LogPNGChunk(logging,mng_cHRM,32L);
11368 primary=image->chromaticity.white_point;
11369 PNGLong(chunk+4,(png_uint_32) (100000*primary.x+0.5));
11370 PNGLong(chunk+8,(png_uint_32) (100000*primary.y+0.5));
11371 primary=image->chromaticity.red_primary;
11372 PNGLong(chunk+12,(png_uint_32) (100000*primary.x+0.5));
11373 PNGLong(chunk+16,(png_uint_32) (100000*primary.y+0.5));
11374 primary=image->chromaticity.green_primary;
11375 PNGLong(chunk+20,(png_uint_32) (100000*primary.x+0.5));
11376 PNGLong(chunk+24,(png_uint_32) (100000*primary.y+0.5));
11377 primary=image->chromaticity.blue_primary;
11378 PNGLong(chunk+28,(png_uint_32) (100000*primary.x+0.5));
11379 PNGLong(chunk+32,(png_uint_32) (100000*primary.y+0.5));
11380 (void) WriteBlob(image,36,chunk);
11381 (void) WriteBlobMSBULong(image,crc32(0,chunk,36));
11382 mng_info->have_write_global_chrm=MagickTrue;
11385 if (image->x_resolution && image->y_resolution && mng_info->equal_physs)
11388 Write MNG pHYs chunk
11390 (void) WriteBlobMSBULong(image,9L);
11391 PNGType(chunk,mng_pHYs);
11392 LogPNGChunk(logging,mng_pHYs,9L);
11394 if (image->units == PixelsPerInchResolution)
11396 PNGLong(chunk+4,(png_uint_32)
11397 (image->x_resolution*100.0/2.54+0.5));
11399 PNGLong(chunk+8,(png_uint_32)
11400 (image->y_resolution*100.0/2.54+0.5));
11407 if (image->units == PixelsPerCentimeterResolution)
11409 PNGLong(chunk+4,(png_uint_32)
11410 (image->x_resolution*100.0+0.5));
11412 PNGLong(chunk+8,(png_uint_32)
11413 (image->y_resolution*100.0+0.5));
11420 PNGLong(chunk+4,(png_uint_32) (image->x_resolution+0.5));
11421 PNGLong(chunk+8,(png_uint_32) (image->y_resolution+0.5));
11425 (void) WriteBlob(image,13,chunk);
11426 (void) WriteBlobMSBULong(image,crc32(0,chunk,13));
11429 Write MNG BACK chunk and global bKGD chunk, if the image is transparent
11430 or does not cover the entire frame.
11432 if (write_mng && (image->matte || image->page.x > 0 ||
11433 image->page.y > 0 || (image->page.width &&
11434 (image->page.width+image->page.x < mng_info->page.width))
11435 || (image->page.height && (image->page.height+image->page.y
11436 < mng_info->page.height))))
11438 (void) WriteBlobMSBULong(image,6L);
11439 PNGType(chunk,mng_BACK);
11440 LogPNGChunk(logging,mng_BACK,6L);
11441 red=ScaleQuantumToShort(image->background_color.red);
11442 green=ScaleQuantumToShort(image->background_color.green);
11443 blue=ScaleQuantumToShort(image->background_color.blue);
11444 PNGShort(chunk+4,red);
11445 PNGShort(chunk+6,green);
11446 PNGShort(chunk+8,blue);
11447 (void) WriteBlob(image,10,chunk);
11448 (void) WriteBlobMSBULong(image,crc32(0,chunk,10));
11449 if (mng_info->equal_backgrounds)
11451 (void) WriteBlobMSBULong(image,6L);
11452 PNGType(chunk,mng_bKGD);
11453 LogPNGChunk(logging,mng_bKGD,6L);
11454 (void) WriteBlob(image,10,chunk);
11455 (void) WriteBlobMSBULong(image,crc32(0,chunk,10));
11459 #ifdef PNG_WRITE_EMPTY_PLTE_SUPPORTED
11460 if ((need_local_plte == MagickFalse) &&
11461 (image->storage_class == PseudoClass) &&
11462 (all_images_are_gray == MagickFalse))
11468 Write MNG PLTE chunk
11470 data_length=3*image->colors;
11471 (void) WriteBlobMSBULong(image,data_length);
11472 PNGType(chunk,mng_PLTE);
11473 LogPNGChunk(logging,mng_PLTE,data_length);
11475 for (i=0; i < (ssize_t) image->colors; i++)
11477 chunk[4+i*3]=ScaleQuantumToChar(image->colormap[i].red) & 0xff;
11478 chunk[5+i*3]=ScaleQuantumToChar(image->colormap[i].green) & 0xff;
11479 chunk[6+i*3]=ScaleQuantumToChar(image->colormap[i].blue) & 0xff;
11482 (void) WriteBlob(image,data_length+4,chunk);
11483 (void) WriteBlobMSBULong(image,crc32(0,chunk,(uInt) (data_length+4)));
11484 mng_info->have_write_global_plte=MagickTrue;
11490 #if defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) || \
11491 defined(PNG_MNG_FEATURES_SUPPORTED)
11492 mng_info->equal_palettes=MagickFalse;
11496 if (mng_info->adjoin)
11498 #if defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) || \
11499 defined(PNG_MNG_FEATURES_SUPPORTED)
11501 If we aren't using a global palette for the entire MNG, check to
11502 see if we can use one for two or more consecutive images.
11504 if (need_local_plte && use_global_plte && !all_images_are_gray)
11506 if (mng_info->IsPalette)
11509 When equal_palettes is true, this image has the same palette
11510 as the previous PseudoClass image
11512 mng_info->have_write_global_plte=mng_info->equal_palettes;
11513 mng_info->equal_palettes=PalettesAreEqual(image,image->next);
11514 if (mng_info->equal_palettes && !mng_info->have_write_global_plte)
11517 Write MNG PLTE chunk
11522 data_length=3*image->colors;
11523 (void) WriteBlobMSBULong(image,data_length);
11524 PNGType(chunk,mng_PLTE);
11525 LogPNGChunk(logging,mng_PLTE,data_length);
11527 for (i=0; i < (ssize_t) image->colors; i++)
11529 chunk[4+i*3]=ScaleQuantumToChar(image->colormap[i].red);
11530 chunk[5+i*3]=ScaleQuantumToChar(image->colormap[i].green);
11531 chunk[6+i*3]=ScaleQuantumToChar(image->colormap[i].blue);
11534 (void) WriteBlob(image,data_length+4,chunk);
11535 (void) WriteBlobMSBULong(image,crc32(0,chunk,
11536 (uInt) (data_length+4)));
11537 mng_info->have_write_global_plte=MagickTrue;
11541 mng_info->have_write_global_plte=MagickFalse;
11552 previous_x=mng_info->page.x;
11553 previous_y=mng_info->page.y;
11560 mng_info->page=image->page;
11561 if ((mng_info->page.x != previous_x) ||
11562 (mng_info->page.y != previous_y))
11564 (void) WriteBlobMSBULong(image,12L); /* data length=12 */
11565 PNGType(chunk,mng_DEFI);
11566 LogPNGChunk(logging,mng_DEFI,12L);
11567 chunk[4]=0; /* object 0 MSB */
11568 chunk[5]=0; /* object 0 LSB */
11569 chunk[6]=0; /* visible */
11570 chunk[7]=0; /* abstract */
11571 PNGLong(chunk+8,(png_uint_32) mng_info->page.x);
11572 PNGLong(chunk+12,(png_uint_32) mng_info->page.y);
11573 (void) WriteBlob(image,16,chunk);
11574 (void) WriteBlobMSBULong(image,crc32(0,chunk,16));
11579 mng_info->write_mng=write_mng;
11581 if ((int) image->dispose >= 3)
11582 mng_info->framing_mode=3;
11584 if (mng_info->need_fram && mng_info->adjoin &&
11585 ((image->delay != mng_info->delay) ||
11586 (mng_info->framing_mode != mng_info->old_framing_mode)))
11588 if (image->delay == mng_info->delay)
11591 Write a MNG FRAM chunk with the new framing mode.
11593 (void) WriteBlobMSBULong(image,1L); /* data length=1 */
11594 PNGType(chunk,mng_FRAM);
11595 LogPNGChunk(logging,mng_FRAM,1L);
11596 chunk[4]=(unsigned char) mng_info->framing_mode;
11597 (void) WriteBlob(image,5,chunk);
11598 (void) WriteBlobMSBULong(image,crc32(0,chunk,5));
11603 Write a MNG FRAM chunk with the delay.
11605 (void) WriteBlobMSBULong(image,10L); /* data length=10 */
11606 PNGType(chunk,mng_FRAM);
11607 LogPNGChunk(logging,mng_FRAM,10L);
11608 chunk[4]=(unsigned char) mng_info->framing_mode;
11609 chunk[5]=0; /* frame name separator (no name) */
11610 chunk[6]=2; /* flag for changing default delay */
11611 chunk[7]=0; /* flag for changing frame timeout */
11612 chunk[8]=0; /* flag for changing frame clipping */
11613 chunk[9]=0; /* flag for changing frame sync_id */
11614 PNGLong(chunk+10,(png_uint_32)
11615 ((mng_info->ticks_per_second*
11616 image->delay)/MagickMax(image->ticks_per_second,1)));
11617 (void) WriteBlob(image,14,chunk);
11618 (void) WriteBlobMSBULong(image,crc32(0,chunk,14));
11619 mng_info->delay=(png_uint_32) image->delay;
11621 mng_info->old_framing_mode=mng_info->framing_mode;
11624 #if defined(JNG_SUPPORTED)
11625 if (image_info->compression == JPEGCompression)
11630 if (logging != MagickFalse)
11631 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
11632 " Writing JNG object.");
11633 /* To do: specify the desired alpha compression method. */
11634 write_info=CloneImageInfo(image_info);
11635 write_info->compression=UndefinedCompression;
11636 status=WriteOneJNGImage(mng_info,write_info,image);
11637 write_info=DestroyImageInfo(write_info);
11642 if (logging != MagickFalse)
11643 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
11644 " Writing PNG object.");
11646 mng_info->need_blob = MagickFalse;
11648 /* We don't want any ancillary chunks written */
11649 mng_info->ping_exclude_bKGD=MagickTrue;
11650 mng_info->ping_exclude_cHRM=MagickTrue;
11651 mng_info->ping_exclude_EXIF=MagickTrue;
11652 mng_info->ping_exclude_gAMA=MagickTrue;
11653 mng_info->ping_exclude_cHRM=MagickTrue;
11654 mng_info->ping_exclude_iCCP=MagickTrue;
11655 /* mng_info->ping_exclude_iTXt=MagickTrue; */
11656 mng_info->ping_exclude_oFFs=MagickTrue;
11657 mng_info->ping_exclude_pHYs=MagickTrue;
11658 mng_info->ping_exclude_sRGB=MagickTrue;
11659 mng_info->ping_exclude_tEXt=MagickTrue;
11660 mng_info->ping_exclude_tRNS=MagickTrue;
11661 mng_info->ping_exclude_vpAg=MagickTrue;
11662 mng_info->ping_exclude_zCCP=MagickTrue;
11663 mng_info->ping_exclude_zTXt=MagickTrue;
11665 status=WriteOnePNGImage(mng_info,image_info,image);
11668 if (status == MagickFalse)
11670 MngInfoFreeStruct(mng_info,&have_mng_structure);
11671 (void) CloseBlob(image);
11672 return(MagickFalse);
11674 (void) CatchImageException(image);
11675 if (GetNextImageInList(image) == (Image *) NULL)
11677 image=SyncNextImageInList(image);
11678 status=SetImageProgress(image,SaveImagesTag,scene++,
11679 GetImageListLength(image));
11681 if (status == MagickFalse)
11684 } while (mng_info->adjoin);
11688 while (GetPreviousImageInList(image) != (Image *) NULL)
11689 image=GetPreviousImageInList(image);
11691 Write the MEND chunk.
11693 (void) WriteBlobMSBULong(image,0x00000000L);
11694 PNGType(chunk,mng_MEND);
11695 LogPNGChunk(logging,mng_MEND,0L);
11696 (void) WriteBlob(image,4,chunk);
11697 (void) WriteBlobMSBULong(image,crc32(0,chunk,4));
11700 Relinquish resources.
11702 (void) CloseBlob(image);
11703 MngInfoFreeStruct(mng_info,&have_mng_structure);
11705 if (logging != MagickFalse)
11706 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"exit WriteMNGImage()");
11708 return(MagickTrue);
11710 #else /* PNG_LIBPNG_VER > 10011 */
11712 static MagickBooleanType WritePNGImage(const ImageInfo *image_info,Image *image)
11715 printf("Your PNG library is too old: You have libpng-%s\n",
11716 PNG_LIBPNG_VER_STRING);
11718 ThrowBinaryException(CoderError,"PNG library is too old",
11719 image_info->filename);
11722 static MagickBooleanType WriteMNGImage(const ImageInfo *image_info,Image *image)
11724 return(WritePNGImage(image_info,image));
11726 #endif /* PNG_LIBPNG_VER > 10011 */