2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read/Write Microsoft Windows Bitmap Image Format %
17 % Glenn Randers-Pehrson %
21 % Copyright 1999-2012 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 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
43 #include "MagickCore/studio.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/cache.h"
47 #include "MagickCore/colormap-private.h"
48 #include "MagickCore/color-private.h"
49 #include "MagickCore/colormap.h"
50 #include "MagickCore/colorspace.h"
51 #include "MagickCore/colorspace-private.h"
52 #include "MagickCore/exception.h"
53 #include "MagickCore/exception-private.h"
54 #include "MagickCore/image.h"
55 #include "MagickCore/image-private.h"
56 #include "MagickCore/list.h"
57 #include "MagickCore/log.h"
58 #include "MagickCore/magick.h"
59 #include "MagickCore/memory_.h"
60 #include "MagickCore/monitor.h"
61 #include "MagickCore/monitor-private.h"
62 #include "MagickCore/pixel-accessor.h"
63 #include "MagickCore/profile.h"
64 #include "MagickCore/quantum-private.h"
65 #include "MagickCore/static.h"
66 #include "MagickCore/string_.h"
67 #include "MagickCore/module.h"
68 #include "MagickCore/transform.h"
71 Macro definitions (from Windows wingdi.h).
77 #if !defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__MINGW32__)
85 #define BI_BITFIELDS 3
87 #undef LCS_CALIBRATED_RBG
88 #define LCS_CALIBRATED_RBG 0
91 #undef LCS_WINDOWS_COLOR_SPACE
92 #define LCS_WINDOWS_COLOR_SPACE 2
94 #define PROFILE_LINKED 3
95 #undef PROFILE_EMBEDDED
96 #define PROFILE_EMBEDDED 4
98 #undef LCS_GM_BUSINESS
99 #define LCS_GM_BUSINESS 1 /* Saturation */
100 #undef LCS_GM_GRAPHICS
101 #define LCS_GM_GRAPHICS 2 /* Relative */
103 #define LCS_GM_IMAGES 4 /* Perceptual */
104 #undef LCS_GM_ABS_COLORIMETRIC
105 #define LCS_GM_ABS_COLORIMETRIC 8 /* Absolute */
109 Typedef declarations.
111 typedef struct _BMPInfo
150 Forward declarations.
152 static MagickBooleanType
153 WriteBMPImage(const ImageInfo *,Image *,ExceptionInfo *);
156 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
160 % D e c o d e I m a g e %
164 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
166 % DecodeImage unpacks the packed image pixels into runlength-encoded
169 % The format of the DecodeImage method is:
171 % MagickBooleanType DecodeImage(Image *image,
172 % const size_t compression,unsigned char *pixels)
174 % A description of each parameter follows:
176 % o image: the address of a structure of type Image.
178 % o compression: Zero means uncompressed. A value of 1 means the
179 % compressed pixels are runlength encoded for a 256-color bitmap.
180 % A value of 2 means a 16-color bitmap. A value of 3 means bitfields
183 % o pixels: The address of a byte (8 bits) array of pixel data created by
184 % the decoding process.
188 static inline ssize_t MagickAbsoluteValue(const ssize_t x)
195 static inline size_t MagickMax(const size_t x,const size_t y)
202 static inline ssize_t MagickMin(const ssize_t x,const ssize_t y)
209 static MagickBooleanType DecodeImage(Image *image,const size_t compression,
210 unsigned char *pixels)
219 register unsigned char
229 assert(image != (Image *) NULL);
230 assert(image->signature == MagickSignature);
231 if (image->debug != MagickFalse)
232 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
233 assert(pixels != (unsigned char *) NULL);
234 (void) ResetMagickMemory(pixels,0,(size_t) image->columns*image->rows*
239 q=pixels+(size_t) image->columns*image->rows;
240 for (y=0; y < (ssize_t) image->rows; )
242 if ((p < pixels) || (p >= q))
244 count=ReadBlobByte(image);
252 count=MagickMin(count,(int) (q-p));
253 byte=(unsigned char) ReadBlobByte(image);
254 if (compression == BI_RLE8)
256 for (i=0; i < count; i++)
257 *p++=(unsigned char) byte;
261 for (i=0; i < count; i++)
263 ((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
272 count=ReadBlobByte(image);
284 p=pixels+y*image->columns;
292 x+=ReadBlobByte(image);
293 y+=ReadBlobByte(image);
294 p=pixels+y*image->columns+x;
302 count=MagickMin(count,(int) (q-p));
303 if (compression == BI_RLE8)
304 for (i=0; i < count; i++)
305 *p++=(unsigned char) ReadBlobByte(image);
307 for (i=0; i < count; i++)
310 byte=(unsigned char) ReadBlobByte(image);
312 ((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
318 if (compression == BI_RLE8)
320 if ((count & 0x01) != 0)
321 (void) ReadBlobByte(image);
324 if (((count & 0x03) == 1) || ((count & 0x03) == 2))
325 (void) ReadBlobByte(image);
330 if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
333 (void) ReadBlobByte(image); /* end of line */
334 (void) ReadBlobByte(image);
339 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
343 % E n c o d e I m a g e %
347 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
349 % EncodeImage compresses pixels using a runlength encoded format.
351 % The format of the EncodeImage method is:
353 % static MagickBooleanType EncodeImage(Image *image,
354 % const size_t bytes_per_line,const unsigned char *pixels,
355 % unsigned char *compressed_pixels)
357 % A description of each parameter follows:
359 % o image: The image.
361 % o bytes_per_line: the number of bytes in a scanline of compressed pixels
363 % o pixels: The address of a byte (8 bits) array of pixel data created by
364 % the compression process.
366 % o compressed_pixels: The address of a byte (8 bits) array of compressed
370 static size_t EncodeImage(Image *image,const size_t bytes_per_line,
371 const unsigned char *pixels,unsigned char *compressed_pixels)
376 register const unsigned char
383 register unsigned char
390 Runlength encode pixels.
392 assert(image != (Image *) NULL);
393 assert(image->signature == MagickSignature);
394 if (image->debug != MagickFalse)
395 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
396 assert(pixels != (const unsigned char *) NULL);
397 assert(compressed_pixels != (unsigned char *) NULL);
401 for (y=0; y < (ssize_t) image->rows; y++)
403 for (x=0; x < (ssize_t) bytes_per_line; x+=i)
408 for (i=1; ((x+i) < (ssize_t) bytes_per_line); i++)
409 if ((i == 255) || (*(p+i) != *p))
411 *q++=(unsigned char) i;
418 *q++=(unsigned char) 0x00;
419 *q++=(unsigned char) 0x00;
420 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
422 if (status == MagickFalse)
428 *q++=(unsigned char) 0x00;
429 *q++=(unsigned char) 0x01;
430 return((size_t) (q-compressed_pixels));
434 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
442 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
444 % IsBMP() returns MagickTrue if the image format type, identified by the
445 % magick string, is BMP.
447 % The format of the IsBMP method is:
449 % MagickBooleanType IsBMP(const unsigned char *magick,const size_t length)
451 % A description of each parameter follows:
453 % o magick: compare image format pattern against these bytes.
455 % o length: Specifies the length of the magick string.
458 static MagickBooleanType IsBMP(const unsigned char *magick,const size_t length)
462 if ((LocaleNCompare((char *) magick,"BA",2) == 0) ||
463 (LocaleNCompare((char *) magick,"BM",2) == 0) ||
464 (LocaleNCompare((char *) magick,"IC",2) == 0) ||
465 (LocaleNCompare((char *) magick,"PI",2) == 0) ||
466 (LocaleNCompare((char *) magick,"CI",2) == 0) ||
467 (LocaleNCompare((char *) magick,"CP",2) == 0))
473 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
477 % R e a d B M P I m a g e %
481 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
483 % ReadBMPImage() reads a Microsoft Windows bitmap image file, Version
484 % 2, 3 (for Windows or NT), or 4, and returns it. It allocates the memory
485 % necessary for the new Image structure and returns a pointer to the new
488 % The format of the ReadBMPImage method is:
490 % image=ReadBMPImage(image_info)
492 % A description of each parameter follows:
494 % o image_info: the image info.
496 % o exception: return any errors or warnings in this structure.
500 static Image *ReadBMPImage(const ImageInfo *image_info,ExceptionInfo *exception)
525 register unsigned char
548 assert(image_info != (const ImageInfo *) NULL);
549 assert(image_info->signature == MagickSignature);
550 if (image_info->debug != MagickFalse)
551 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
552 image_info->filename);
553 assert(exception != (ExceptionInfo *) NULL);
554 assert(exception->signature == MagickSignature);
555 image=AcquireImage(image_info,exception);
556 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
557 if (status == MagickFalse)
559 image=DestroyImageList(image);
560 return((Image *) NULL);
563 Determine if this a BMP file.
565 (void) ResetMagickMemory(&bmp_info,0,sizeof(bmp_info));
566 bmp_info.ba_offset=0;
568 count=ReadBlob(image,2,magick);
582 Verify BMP identifier.
584 if (bmp_info.ba_offset == 0)
585 start_position=TellBlob(image)-2;
586 bmp_info.ba_offset=0;
587 while (LocaleNCompare((char *) magick,"BA",2) == 0)
589 bmp_info.file_size=ReadBlobLSBLong(image);
590 bmp_info.ba_offset=ReadBlobLSBLong(image);
591 bmp_info.offset_bits=ReadBlobLSBLong(image);
592 count=ReadBlob(image,2,magick);
596 if (image->debug != MagickFalse)
597 (void) LogMagickEvent(CoderEvent,GetMagickModule()," Magick: %c%c",
598 magick[0],magick[1]);
599 if ((count == 0) || ((LocaleNCompare((char *) magick,"BM",2) != 0) &&
600 (LocaleNCompare((char *) magick,"CI",2) != 0)))
601 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
602 bmp_info.file_size=ReadBlobLSBLong(image);
603 (void) ReadBlobLSBLong(image);
604 bmp_info.offset_bits=ReadBlobLSBLong(image);
605 bmp_info.size=ReadBlobLSBLong(image);
606 if (image->debug != MagickFalse)
607 (void) LogMagickEvent(CoderEvent,GetMagickModule()," BMP size: %u",
609 if (bmp_info.size == 12)
614 bmp_info.width=(short) ReadBlobLSBShort(image);
615 bmp_info.height=(short) ReadBlobLSBShort(image);
616 bmp_info.planes=ReadBlobLSBShort(image);
617 bmp_info.bits_per_pixel=ReadBlobLSBShort(image);
620 bmp_info.number_colors=0;
621 bmp_info.compression=BI_RGB;
622 bmp_info.image_size=0;
623 bmp_info.alpha_mask=0;
624 if (image->debug != MagickFalse)
626 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
627 " Format: OS/2 Bitmap");
628 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
629 " Geometry: %.20gx%.20g",(double) bmp_info.width,(double)
636 Microsoft Windows BMP image file.
638 if (bmp_info.size < 40)
639 ThrowReaderException(CorruptImageError,"NonOS2HeaderSizeError");
640 bmp_info.width=(int) ReadBlobLSBLong(image);
641 bmp_info.height=(int) ReadBlobLSBLong(image);
642 bmp_info.planes=ReadBlobLSBShort(image);
643 bmp_info.bits_per_pixel=ReadBlobLSBShort(image);
644 bmp_info.compression=ReadBlobLSBLong(image);
645 bmp_info.image_size=ReadBlobLSBLong(image);
646 bmp_info.x_pixels=ReadBlobLSBLong(image);
647 bmp_info.y_pixels=ReadBlobLSBLong(image);
648 bmp_info.number_colors=ReadBlobLSBLong(image);
649 bmp_info.colors_important=ReadBlobLSBLong(image);
652 if (image->debug != MagickFalse)
654 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
655 " Format: MS Windows bitmap");
656 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
657 " Geometry: %.20gx%.20g",(double) bmp_info.width,(double)
659 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
660 " Bits per pixel: %.20g",(double) bmp_info.bits_per_pixel);
661 switch ((int) bmp_info.compression)
665 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
666 " Compression: BI_RGB");
671 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
672 " Compression: BI_RLE4");
677 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
678 " Compression: BI_RLE8");
683 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
684 " Compression: BI_BITFIELDS");
689 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
690 " Compression: BI_PNG");
695 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
696 " Compression: BI_JPEG");
701 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
702 " Compression: UNKNOWN (%u)",bmp_info.compression);
705 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
706 " Number of colors: %u",bmp_info.number_colors);
708 bmp_info.red_mask=ReadBlobLSBLong(image);
709 bmp_info.green_mask=ReadBlobLSBLong(image);
710 bmp_info.blue_mask=ReadBlobLSBLong(image);
711 if (bmp_info.size > 40)
717 Read color management information.
719 bmp_info.alpha_mask=ReadBlobLSBLong(image);
720 bmp_info.colorspace=(int) ReadBlobLSBLong(image);
722 Decode 2^30 fixed point formatted CIE primaries.
724 bmp_info.red_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
725 bmp_info.red_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
726 bmp_info.red_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
727 bmp_info.green_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
728 bmp_info.green_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
729 bmp_info.green_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
730 bmp_info.blue_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
731 bmp_info.blue_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
732 bmp_info.blue_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
733 sum=bmp_info.red_primary.x+bmp_info.red_primary.y+
734 bmp_info.red_primary.z;
735 image->chromaticity.red_primary.x/=sum;
736 image->chromaticity.red_primary.y/=sum;
737 sum=bmp_info.green_primary.x+bmp_info.green_primary.y+
738 bmp_info.green_primary.z;
739 image->chromaticity.green_primary.x/=sum;
740 image->chromaticity.green_primary.y/=sum;
741 sum=bmp_info.blue_primary.x+bmp_info.blue_primary.y+
742 bmp_info.blue_primary.z;
743 image->chromaticity.blue_primary.x/=sum;
744 image->chromaticity.blue_primary.y/=sum;
746 Decode 16^16 fixed point formatted gamma_scales.
748 bmp_info.gamma_scale.x=(double) ReadBlobLSBLong(image)/0xffff;
749 bmp_info.gamma_scale.y=(double) ReadBlobLSBLong(image)/0xffff;
750 bmp_info.gamma_scale.z=(double) ReadBlobLSBLong(image)/0xffff;
752 Compute a single gamma from the BMP 3-channel gamma.
754 image->gamma=(bmp_info.gamma_scale.x+bmp_info.gamma_scale.y+
755 bmp_info.gamma_scale.z)/3.0;
757 if (bmp_info.size > 108)
763 Read BMP Version 5 color management information.
765 intent=ReadBlobLSBLong(image);
766 switch ((int) intent)
768 case LCS_GM_BUSINESS:
770 image->rendering_intent=SaturationIntent;
773 case LCS_GM_GRAPHICS:
775 image->rendering_intent=RelativeIntent;
780 image->rendering_intent=PerceptualIntent;
783 case LCS_GM_ABS_COLORIMETRIC:
785 image->rendering_intent=AbsoluteIntent;
789 profile_data=ReadBlobLSBLong(image);
790 profile_size=ReadBlobLSBLong(image);
793 (void) ReadBlobLSBLong(image); /* Reserved byte */
796 if ((MagickSizeType) bmp_info.file_size > GetBlobSize(image))
797 (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
798 "LengthAndFilesizeDoNotMatch","`%s'",image->filename);
800 if ((MagickSizeType) bmp_info.file_size < GetBlobSize(image))
801 (void) ThrowMagickException(exception,GetMagickModule(),
802 CorruptImageWarning,"LengthAndFilesizeDoNotMatch","`%s'",
804 if (bmp_info.width <= 0)
805 ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
806 if (bmp_info.height == 0)
807 ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
808 if (bmp_info.planes != 1)
809 ThrowReaderException(CorruptImageError,"StaticPlanesValueNotEqualToOne");
810 if ((bmp_info.bits_per_pixel != 1) && (bmp_info.bits_per_pixel != 4) &&
811 (bmp_info.bits_per_pixel != 8) && (bmp_info.bits_per_pixel != 16) &&
812 (bmp_info.bits_per_pixel != 24) && (bmp_info.bits_per_pixel != 32))
813 ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
814 if (bmp_info.number_colors > (1U << bmp_info.bits_per_pixel))
816 if (bmp_info.bits_per_pixel < 24)
817 ThrowReaderException(CorruptImageError,"UnrecognizedNumberOfColors");
818 bmp_info.number_colors=0;
820 if ((bmp_info.compression == 1) && (bmp_info.bits_per_pixel != 8))
821 ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
822 if ((bmp_info.compression == 2) && (bmp_info.bits_per_pixel != 4))
823 ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
824 if ((bmp_info.compression == 3) && (bmp_info.bits_per_pixel < 16))
825 ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
826 switch (bmp_info.compression)
834 ThrowReaderException(CoderError,"JPEGCompressNotSupported");
836 ThrowReaderException(CoderError,"PNGCompressNotSupported");
838 ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
840 image->columns=(size_t) MagickAbsoluteValue(bmp_info.width);
841 image->rows=(size_t) MagickAbsoluteValue(bmp_info.height);
842 image->depth=bmp_info.bits_per_pixel <= 8 ? bmp_info.bits_per_pixel : 8;
843 image->resolution.x=(double) bmp_info.x_pixels/100.0;
844 image->resolution.y=(double) bmp_info.y_pixels/100.0;
845 image->units=PixelsPerCentimeterResolution;
846 if ((bmp_info.bits_per_pixel == 16) || (bmp_info.bits_per_pixel == 32))
847 image->matte=bmp_info.alpha_mask != 0 ? MagickTrue : MagickFalse;
848 if ((bmp_info.number_colors != 0) || (bmp_info.bits_per_pixel < 16))
853 image->storage_class=PseudoClass;
854 image->colors=bmp_info.number_colors;
856 if (image->colors == 0)
857 image->colors=one << bmp_info.bits_per_pixel;
859 if (image->storage_class == PseudoClass)
868 Read BMP raster colormap.
870 if (image->debug != MagickFalse)
871 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
872 " Reading colormap of %.20g colors",(double) image->colors);
873 if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
874 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
875 bmp_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
876 image->colors,4*sizeof(*bmp_colormap));
877 if (bmp_colormap == (unsigned char *) NULL)
878 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
879 if ((bmp_info.size == 12) || (bmp_info.size == 64))
883 offset=SeekBlob(image,start_position+14+bmp_info.size,SEEK_SET);
885 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
886 count=ReadBlob(image,packet_size*image->colors,bmp_colormap);
887 if (count != (ssize_t) (packet_size*image->colors))
888 ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
890 for (i=0; i < (ssize_t) image->colors; i++)
892 image->colormap[i].blue=ScaleCharToQuantum(*p++);
893 image->colormap[i].green=ScaleCharToQuantum(*p++);
894 image->colormap[i].red=ScaleCharToQuantum(*p++);
895 if (packet_size == 4)
898 bmp_colormap=(unsigned char *) RelinquishMagickMemory(bmp_colormap);
900 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
901 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
906 offset=SeekBlob(image,start_position+bmp_info.offset_bits,SEEK_SET);
908 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
909 if (bmp_info.compression == BI_RLE4)
910 bmp_info.bits_per_pixel<<=1;
911 bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
912 length=(size_t) bytes_per_line*image->rows;
913 pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->rows,
914 MagickMax(bytes_per_line,image->columns+256UL)*sizeof(*pixels));
915 if (pixels == (unsigned char *) NULL)
916 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
917 if ((bmp_info.compression == BI_RGB) ||
918 (bmp_info.compression == BI_BITFIELDS))
920 if (image->debug != MagickFalse)
921 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
922 " Reading pixels (%.20g bytes)",(double) length);
923 count=ReadBlob(image,length,pixels);
924 if (count != (ssize_t) length)
926 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
927 ThrowReaderException(CorruptImageError,
928 "InsufficientImageDataInFile");
934 Convert run-length encoded raster pixels.
936 status=DecodeImage(image,bmp_info.compression,pixels);
937 if (status == MagickFalse)
939 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
940 ThrowReaderException(CorruptImageError,
941 "UnableToRunlengthDecodeImage");
945 Convert BMP raster image to pixel packets.
947 if (bmp_info.compression == BI_RGB)
949 bmp_info.alpha_mask=0;
950 bmp_info.red_mask=0x00ff0000U;
951 bmp_info.green_mask=0x0000ff00U;
952 bmp_info.blue_mask=0x000000ffU;
953 if (bmp_info.bits_per_pixel == 16)
958 bmp_info.red_mask=0x00007c00U;
959 bmp_info.green_mask=0x000003e0U;
960 bmp_info.blue_mask=0x0000001fU;
963 if ((bmp_info.bits_per_pixel == 16) || (bmp_info.bits_per_pixel == 32))
969 Get shift and quantum bits info from bitfield masks.
971 (void) ResetMagickMemory(&shift,0,sizeof(shift));
972 (void) ResetMagickMemory(&quantum_bits,0,sizeof(quantum_bits));
973 if (bmp_info.red_mask != 0)
974 while (((bmp_info.red_mask << shift.red) & 0x80000000UL) == 0)
976 if (bmp_info.green_mask != 0)
977 while (((bmp_info.green_mask << shift.green) & 0x80000000UL) == 0)
979 if (bmp_info.blue_mask != 0)
980 while (((bmp_info.blue_mask << shift.blue) & 0x80000000UL) == 0)
982 if (bmp_info.alpha_mask != 0)
983 while (((bmp_info.alpha_mask << shift.alpha) & 0x80000000UL) == 0)
986 while (((bmp_info.red_mask << sample) & 0x80000000UL) != 0)
988 quantum_bits.red=(Quantum) (sample-shift.red);
990 while (((bmp_info.green_mask << sample) & 0x80000000UL) != 0)
992 quantum_bits.green=(Quantum) (sample-shift.green);
994 while (((bmp_info.blue_mask << sample) & 0x80000000UL) != 0)
996 quantum_bits.blue=(Quantum) (sample-shift.blue);
998 while (((bmp_info.alpha_mask << sample) & 0x80000000UL) != 0)
1000 quantum_bits.alpha=(Quantum) (sample-shift.alpha);
1002 switch (bmp_info.bits_per_pixel)
1007 Convert bitmap scanline.
1009 for (y=(ssize_t) image->rows-1; y >= 0; y--)
1011 p=pixels+(image->rows-y-1)*bytes_per_line;
1012 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1013 if (q == (Quantum *) NULL)
1015 for (x=0; x < ((ssize_t) image->columns-7); x+=8)
1017 for (bit=0; bit < 8; bit++)
1019 index=(Quantum) (((*p) & (0x80 >> bit)) != 0 ? 0x01 : 0x00);
1020 SetPixelIndex(image,index,q);
1021 q+=GetPixelChannels(image);
1025 if ((image->columns % 8) != 0)
1027 for (bit=0; bit < (image->columns % 8); bit++)
1029 index=(Quantum) (((*p) & (0x80 >> bit)) != 0 ? 0x01 : 0x00);
1030 SetPixelIndex(image,index,q);
1031 q+=GetPixelChannels(image);
1035 if (SyncAuthenticPixels(image,exception) == MagickFalse)
1037 if (image->previous == (Image *) NULL)
1039 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1041 if (status == MagickFalse)
1045 (void) SyncImage(image,exception);
1051 Convert PseudoColor scanline.
1053 for (y=(ssize_t) image->rows-1; y >= 0; y--)
1055 p=pixels+(image->rows-y-1)*bytes_per_line;
1056 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1057 if (q == (Quantum *) NULL)
1059 for (x=0; x < ((ssize_t) image->columns-1); x+=2)
1061 index=ConstrainColormapIndex(image,(*p >> 4) & 0x0f,exception);
1062 SetPixelIndex(image,index,q);
1063 q+=GetPixelChannels(image);
1064 index=ConstrainColormapIndex(image,*p & 0x0f,exception);
1065 SetPixelIndex(image,index,q);
1066 q+=GetPixelChannels(image);
1069 if ((image->columns % 2) != 0)
1071 index=ConstrainColormapIndex(image,(*p >> 4) & 0xf,exception);
1072 SetPixelIndex(image,index,q);
1073 q+=GetPixelChannels(image);
1076 if (SyncAuthenticPixels(image,exception) == MagickFalse)
1078 if (image->previous == (Image *) NULL)
1080 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1082 if (status == MagickFalse)
1086 (void) SyncImage(image,exception);
1092 Convert PseudoColor scanline.
1094 if ((bmp_info.compression == BI_RLE8) ||
1095 (bmp_info.compression == BI_RLE4))
1096 bytes_per_line=image->columns;
1097 for (y=(ssize_t) image->rows-1; y >= 0; y--)
1099 p=pixels+(image->rows-y-1)*bytes_per_line;
1100 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1101 if (q == (Quantum *) NULL)
1103 for (x = (ssize_t)image->columns; x != 0; --x)
1105 index=ConstrainColormapIndex(image,*p++,exception);
1106 SetPixelIndex(image,index,q);
1107 q+=GetPixelChannels(image);
1109 if (SyncAuthenticPixels(image,exception) == MagickFalse)
1111 offset=(MagickOffsetType) (image->rows-y-1);
1112 if (image->previous == (Image *) NULL)
1114 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1116 if (status == MagickFalse)
1120 (void) SyncImage(image,exception);
1129 Convert bitfield encoded 16-bit PseudoColor scanline.
1131 if (bmp_info.compression != BI_RGB &&
1132 bmp_info.compression != BI_BITFIELDS)
1134 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1135 ThrowReaderException(CorruptImageError,
1136 "UnrecognizedImageCompression");
1138 bytes_per_line=2*(image->columns+image->columns % 2);
1139 image->storage_class=DirectClass;
1140 for (y=(ssize_t) image->rows-1; y >= 0; y--)
1142 p=pixels+(image->rows-y-1)*bytes_per_line;
1143 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1144 if (q == (Quantum *) NULL)
1146 for (x=0; x < (ssize_t) image->columns; x++)
1148 pixel=(size_t) (*p++);
1150 red=((pixel & bmp_info.red_mask) << shift.red) >> 16;
1151 if (quantum_bits.red == 5)
1152 red|=((red & 0xe000) >> 5);
1153 if (quantum_bits.red <= 8)
1154 red|=((red & 0xff00) >> 8);
1155 green=((pixel & bmp_info.green_mask) << shift.green) >> 16;
1156 if (quantum_bits.green == 5)
1157 green|=((green & 0xe000) >> 5);
1158 if (quantum_bits.green == 6)
1159 green|=((green & 0xc000) >> 6);
1160 if (quantum_bits.green <= 8)
1161 green|=((green & 0xff00) >> 8);
1162 blue=((pixel & bmp_info.blue_mask) << shift.blue) >> 16;
1163 if (quantum_bits.blue == 5)
1164 blue|=((blue & 0xe000) >> 5);
1165 if (quantum_bits.blue <= 8)
1166 blue|=((blue & 0xff00) >> 8);
1167 opacity=((pixel & bmp_info.alpha_mask) << shift.alpha) >> 16;
1168 if (quantum_bits.alpha <= 8)
1169 opacity|=((opacity & 0xff00) >> 8);
1170 SetPixelRed(image,ScaleShortToQuantum((unsigned short) red),q);
1171 SetPixelGreen(image,ScaleShortToQuantum((unsigned short) green),q);
1172 SetPixelBlue(image,ScaleShortToQuantum((unsigned short) blue),q);
1173 SetPixelAlpha(image,OpaqueAlpha,q);
1174 if (image->matte != MagickFalse)
1175 SetPixelAlpha(image,
1176 ScaleShortToQuantum((unsigned short) opacity),q);
1177 q+=GetPixelChannels(image);
1179 if (SyncAuthenticPixels(image,exception) == MagickFalse)
1181 offset=(MagickOffsetType) (image->rows-y-1);
1182 if (image->previous == (Image *) NULL)
1184 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1186 if (status == MagickFalse)
1195 Convert DirectColor scanline.
1197 bytes_per_line=4*((image->columns*24+31)/32);
1198 for (y=(ssize_t) image->rows-1; y >= 0; y--)
1200 p=pixels+(image->rows-y-1)*bytes_per_line;
1201 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1202 if (q == (Quantum *) NULL)
1204 for (x=0; x < (ssize_t) image->columns; x++)
1206 SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
1207 SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
1208 SetPixelRed(image,ScaleCharToQuantum(*p++),q);
1209 SetPixelAlpha(image,OpaqueAlpha,q);
1210 q+=GetPixelChannels(image);
1212 if (SyncAuthenticPixels(image,exception) == MagickFalse)
1214 offset=(MagickOffsetType) (image->rows-y-1);
1215 if (image->previous == (Image *) NULL)
1217 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1219 if (status == MagickFalse)
1228 Convert bitfield encoded DirectColor scanline.
1230 if ((bmp_info.compression != BI_RGB) &&
1231 (bmp_info.compression != BI_BITFIELDS))
1233 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1234 ThrowReaderException(CorruptImageError,
1235 "UnrecognizedImageCompression");
1237 bytes_per_line=4*(image->columns);
1238 for (y=(ssize_t) image->rows-1; y >= 0; y--)
1243 p=pixels+(image->rows-y-1)*bytes_per_line;
1244 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1245 if (q == (Quantum *) NULL)
1247 for (x=0; x < (ssize_t) image->columns; x++)
1249 pixel=(size_t) (*p++);
1251 pixel|=(*p++ << 16);
1252 pixel|=(*p++ << 24);
1253 red=((pixel & bmp_info.red_mask) << shift.red) >> 16;
1254 if (quantum_bits.red == 8)
1256 green=((pixel & bmp_info.green_mask) << shift.green) >> 16;
1257 if (quantum_bits.green == 8)
1258 green|=(green >> 8);
1259 blue=((pixel & bmp_info.blue_mask) << shift.blue) >> 16;
1260 if (quantum_bits.blue == 8)
1262 opacity=((pixel & bmp_info.alpha_mask) << shift.alpha) >> 16;
1263 if (quantum_bits.alpha == 8)
1264 opacity|=(opacity >> 8);
1265 SetPixelRed(image,ScaleShortToQuantum((unsigned short) red),q);
1266 SetPixelGreen(image,ScaleShortToQuantum((unsigned short) green),q);
1267 SetPixelBlue(image,ScaleShortToQuantum((unsigned short) blue),q);
1268 SetPixelAlpha(image,OpaqueAlpha,q);
1269 if (image->matte != MagickFalse)
1270 SetPixelAlpha(image,
1271 ScaleShortToQuantum((unsigned short) opacity),q);
1272 q+=GetPixelChannels(image);
1274 if (SyncAuthenticPixels(image,exception) == MagickFalse)
1276 offset=(MagickOffsetType) (image->rows-y-1);
1277 if (image->previous == (Image *) NULL)
1279 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1281 if (status == MagickFalse)
1289 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1290 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1293 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1294 if (EOFBlob(image) != MagickFalse)
1296 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
1300 if (bmp_info.height < 0)
1306 Correct image orientation.
1308 flipped_image=FlipImage(image,exception);
1309 if (flipped_image != (Image *) NULL)
1311 DuplicateBlob(flipped_image,image);
1312 image=DestroyImage(image);
1313 image=flipped_image;
1317 Proceed to next image.
1319 if (image_info->number_scenes != 0)
1320 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
1323 if (bmp_info.ba_offset != 0)
1325 offset=SeekBlob(image,(MagickOffsetType) bmp_info.ba_offset,SEEK_SET);
1327 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1329 count=ReadBlob(image,2,magick);
1330 if ((count == 2) && (IsBMP(magick,2) != MagickFalse))
1333 Acquire next image structure.
1335 AcquireNextImage(image_info,image,exception);
1336 if (GetNextImageInList(image) == (Image *) NULL)
1338 image=DestroyImageList(image);
1339 return((Image *) NULL);
1341 image=SyncNextImageInList(image);
1342 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
1343 GetBlobSize(image));
1344 if (status == MagickFalse)
1347 } while (IsBMP(magick,2) != MagickFalse);
1348 (void) CloseBlob(image);
1349 return(GetFirstImageInList(image));
1353 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1357 % R e g i s t e r B M P I m a g e %
1361 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1363 % RegisterBMPImage() adds attributes for the BMP image format to
1364 % the list of supported formats. The attributes include the image format
1365 % tag, a method to read and/or write the format, whether the format
1366 % supports the saving of more than one frame to the same file or blob,
1367 % whether the format supports native in-memory I/O, and a brief
1368 % description of the format.
1370 % The format of the RegisterBMPImage method is:
1372 % size_t RegisterBMPImage(void)
1375 ModuleExport size_t RegisterBMPImage(void)
1380 entry=SetMagickInfo("BMP");
1381 entry->decoder=(DecodeImageHandler *) ReadBMPImage;
1382 entry->encoder=(EncodeImageHandler *) WriteBMPImage;
1383 entry->magick=(IsImageFormatHandler *) IsBMP;
1384 entry->description=ConstantString("Microsoft Windows bitmap image");
1385 entry->module=ConstantString("BMP");
1386 entry->adjoin=MagickFalse;
1387 entry->seekable_stream=MagickTrue;
1388 (void) RegisterMagickInfo(entry);
1389 entry=SetMagickInfo("BMP2");
1390 entry->encoder=(EncodeImageHandler *) WriteBMPImage;
1391 entry->magick=(IsImageFormatHandler *) IsBMP;
1392 entry->description=ConstantString("Microsoft Windows bitmap image (V2)");
1393 entry->module=ConstantString("BMP");
1394 entry->adjoin=MagickFalse;
1395 entry->seekable_stream=MagickTrue;
1396 (void) RegisterMagickInfo(entry);
1397 entry=SetMagickInfo("BMP3");
1398 entry->encoder=(EncodeImageHandler *) WriteBMPImage;
1399 entry->magick=(IsImageFormatHandler *) IsBMP;
1400 entry->description=ConstantString("Microsoft Windows bitmap image (V3)");
1401 entry->module=ConstantString("BMP");
1402 entry->adjoin=MagickFalse;
1403 entry->seekable_stream=MagickTrue;
1404 (void) RegisterMagickInfo(entry);
1405 return(MagickImageCoderSignature);
1409 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1413 % U n r e g i s t e r B M P I m a g e %
1417 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1419 % UnregisterBMPImage() removes format registrations made by the
1420 % BMP module from the list of supported formats.
1422 % The format of the UnregisterBMPImage method is:
1424 % UnregisterBMPImage(void)
1427 ModuleExport void UnregisterBMPImage(void)
1429 (void) UnregisterMagickInfo("BMP");
1430 (void) UnregisterMagickInfo("BMP2");
1431 (void) UnregisterMagickInfo("BMP3");
1435 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1439 % W r i t e B M P I m a g e %
1443 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1445 % WriteBMPImage() writes an image in Microsoft Windows bitmap encoded
1446 % image format, version 3 for Windows or (if the image has a matte channel)
1449 % The format of the WriteBMPImage method is:
1451 % MagickBooleanType WriteBMPImage(const ImageInfo *image_info,
1452 % Image *image,ExceptionInfo *exception)
1454 % A description of each parameter follows.
1456 % o image_info: the image info.
1458 % o image: The image.
1460 % o exception: return any errors or warnings in this structure.
1463 static MagickBooleanType WriteBMPImage(const ImageInfo *image_info,Image *image,
1464 ExceptionInfo *exception)
1479 register const Quantum
1486 register unsigned char
1501 Open output image file.
1503 assert(image_info != (const ImageInfo *) NULL);
1504 assert(image_info->signature == MagickSignature);
1505 assert(image != (Image *) NULL);
1506 assert(image->signature == MagickSignature);
1507 if (image->debug != MagickFalse)
1508 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1509 assert(exception != (ExceptionInfo *) NULL);
1510 assert(exception->signature == MagickSignature);
1511 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1512 if (status == MagickFalse)
1515 if (LocaleCompare(image_info->magick,"BMP2") == 0)
1518 if (LocaleCompare(image_info->magick,"BMP3") == 0)
1524 Initialize BMP raster file header.
1526 if (IsRGBColorspace(image->colorspace) == MagickFalse)
1527 (void) TransformImageColorspace(image,sRGBColorspace,exception);
1528 (void) ResetMagickMemory(&bmp_info,0,sizeof(bmp_info));
1529 bmp_info.file_size=14+12;
1531 bmp_info.file_size+=28;
1532 bmp_info.offset_bits=bmp_info.file_size;
1533 bmp_info.compression=BI_RGB;
1534 if ((image->storage_class == PseudoClass) && (image->colors > 256))
1535 (void) SetImageStorageClass(image,DirectClass,exception);
1536 if (image->storage_class != DirectClass)
1539 Colormapped BMP raster.
1541 bmp_info.bits_per_pixel=8;
1542 if (image->colors <= 2)
1543 bmp_info.bits_per_pixel=1;
1545 if (image->colors <= 16)
1546 bmp_info.bits_per_pixel=4;
1548 if (image->colors <= 256)
1549 bmp_info.bits_per_pixel=8;
1550 if (image_info->compression == RLECompression)
1551 bmp_info.bits_per_pixel=8;
1552 bmp_info.number_colors=1U << bmp_info.bits_per_pixel;
1553 if (image->matte != MagickFalse)
1554 (void) SetImageStorageClass(image,DirectClass,exception);
1556 if ((size_t) bmp_info.number_colors < image->colors)
1557 (void) SetImageStorageClass(image,DirectClass,exception);
1560 bmp_info.file_size+=3*(1UL << bmp_info.bits_per_pixel);
1561 bmp_info.offset_bits+=3*(1UL << bmp_info.bits_per_pixel);
1564 bmp_info.file_size+=(1UL << bmp_info.bits_per_pixel);
1565 bmp_info.offset_bits+=(1UL << bmp_info.bits_per_pixel);
1569 if (image->storage_class == DirectClass)
1572 Full color BMP raster.
1574 bmp_info.number_colors=0;
1575 bmp_info.bits_per_pixel=(unsigned short)
1576 ((type > 3) && (image->matte != MagickFalse) ? 32 : 24);
1577 bmp_info.compression=(unsigned int) ((type > 3) &&
1578 (image->matte != MagickFalse) ? BI_BITFIELDS : BI_RGB);
1580 bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
1581 bmp_info.ba_offset=0;
1582 profile=GetImageProfile(image,"icc");
1583 have_color_info=(image->rendering_intent != UndefinedIntent) ||
1584 (profile != (StringInfo *) NULL) || (image->gamma != 0.0) ? MagickTrue :
1589 if ((type == 3) || ((image->matte == MagickFalse) &&
1590 (have_color_info == MagickFalse)))
1602 if ((image->rendering_intent != UndefinedIntent) ||
1603 (profile != (StringInfo *) NULL))
1608 bmp_info.file_size+=extra_size;
1609 bmp_info.offset_bits+=extra_size;
1611 bmp_info.width=(ssize_t) image->columns;
1612 bmp_info.height=(ssize_t) image->rows;
1614 bmp_info.image_size=(unsigned int) (bytes_per_line*image->rows);
1615 bmp_info.file_size+=bmp_info.image_size;
1616 bmp_info.x_pixels=75*39;
1617 bmp_info.y_pixels=75*39;
1618 switch (image->units)
1620 case UndefinedResolution:
1621 case PixelsPerInchResolution:
1623 bmp_info.x_pixels=(unsigned int) (100.0*image->resolution.x/2.54);
1624 bmp_info.y_pixels=(unsigned int) (100.0*image->resolution.y/2.54);
1627 case PixelsPerCentimeterResolution:
1629 bmp_info.x_pixels=(unsigned int) (100.0*image->resolution.x);
1630 bmp_info.y_pixels=(unsigned int) (100.0*image->resolution.y);
1634 bmp_info.colors_important=bmp_info.number_colors;
1636 Convert MIFF to BMP raster pixels.
1638 pixels=(unsigned char *) AcquireQuantumMemory((size_t) bmp_info.image_size,
1640 if (pixels == (unsigned char *) NULL)
1641 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1642 (void) ResetMagickMemory(pixels,0,(size_t) bmp_info.image_size);
1643 switch (bmp_info.bits_per_pixel)
1652 Convert PseudoClass image to a BMP monochrome image.
1654 for (y=0; y < (ssize_t) image->rows; y++)
1659 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1660 if (p == (const Quantum *) NULL)
1662 q=pixels+(image->rows-y-1)*bytes_per_line;
1665 for (x=0; x < (ssize_t) image->columns; x++)
1668 byte|=GetPixelIndex(image,p) != 0 ? 0x01 : 0x00;
1672 *q++=(unsigned char) byte;
1676 p+=GetPixelChannels(image);
1680 *q++=(unsigned char) (byte << (8-bit));
1683 offset=(ssize_t) (image->columns+7)/8;
1684 for (x=offset; x < (ssize_t) bytes_per_line; x++)
1686 if (image->previous == (Image *) NULL)
1688 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1690 if (status == MagickFalse)
1704 Convert PseudoClass image to a BMP monochrome image.
1706 for (y=0; y < (ssize_t) image->rows; y++)
1708 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1709 if (p == (const Quantum *) NULL)
1711 q=pixels+(image->rows-y-1)*bytes_per_line;
1714 for (x=0; x < (ssize_t) image->columns; x++)
1717 byte|=((size_t) GetPixelIndex(image,p) & 0x0f);
1721 *q++=(unsigned char) byte;
1725 p+=GetPixelChannels(image);
1729 *q++=(unsigned char) (byte << 4);
1732 offset=(ssize_t) (image->columns+1)/2;
1733 for (x=offset; x < (ssize_t) bytes_per_line; x++)
1735 if (image->previous == (Image *) NULL)
1737 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1739 if (status == MagickFalse)
1748 Convert PseudoClass packet to BMP pixel.
1750 for (y=0; y < (ssize_t) image->rows; y++)
1752 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1753 if (p == (const Quantum *) NULL)
1755 q=pixels+(image->rows-y-1)*bytes_per_line;
1756 for (x=0; x < (ssize_t) image->columns; x++)
1758 *q++=(unsigned char) GetPixelIndex(image,p);
1759 p+=GetPixelChannels(image);
1761 for ( ; x < (ssize_t) bytes_per_line; x++)
1763 if (image->previous == (Image *) NULL)
1765 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1767 if (status == MagickFalse)
1776 Convert DirectClass packet to BMP BGR888.
1778 for (y=0; y < (ssize_t) image->rows; y++)
1780 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1781 if (p == (const Quantum *) NULL)
1783 q=pixels+(image->rows-y-1)*bytes_per_line;
1784 for (x=0; x < (ssize_t) image->columns; x++)
1786 *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
1787 *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
1788 *q++=ScaleQuantumToChar(GetPixelRed(image,p));
1789 p+=GetPixelChannels(image);
1791 for (x=3L*(ssize_t) image->columns; x < (ssize_t) bytes_per_line; x++)
1793 if (image->previous == (Image *) NULL)
1795 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1797 if (status == MagickFalse)
1806 Convert DirectClass packet to ARGB8888 pixel.
1808 for (y=0; y < (ssize_t) image->rows; y++)
1810 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1811 if (p == (const Quantum *) NULL)
1813 q=pixels+(image->rows-y-1)*bytes_per_line;
1814 for (x=0; x < (ssize_t) image->columns; x++)
1816 *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
1817 *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
1818 *q++=ScaleQuantumToChar(GetPixelRed(image,p));
1819 *q++=ScaleQuantumToChar(GetPixelAlpha(image,p));
1820 p+=GetPixelChannels(image);
1822 if (image->previous == (Image *) NULL)
1824 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1826 if (status == MagickFalse)
1833 if ((type > 2) && (bmp_info.bits_per_pixel == 8))
1834 if (image_info->compression != NoCompression)
1840 Convert run-length encoded raster pixels.
1842 length=(size_t) (2*(bytes_per_line+2)*(image->rows+2)+2);
1843 bmp_data=(unsigned char *) NULL;
1844 if (~length >= bytes_per_line)
1845 bmp_data=(unsigned char *) AcquireQuantumMemory(length+
1846 bytes_per_line,sizeof(*bmp_data));
1847 if (bmp_data == (unsigned char *) NULL)
1849 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1850 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1852 bmp_info.file_size-=bmp_info.image_size;
1853 bmp_info.image_size=(unsigned int) EncodeImage(image,bytes_per_line,
1855 bmp_info.file_size+=bmp_info.image_size;
1856 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1858 bmp_info.compression=BI_RLE8;
1861 Write BMP for Windows, all versions, 14-byte header.
1863 if (image->debug != MagickFalse)
1865 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1866 " Writing BMP version %.20g datastream",(double) type);
1867 if (image->storage_class == DirectClass)
1868 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1869 " Storage class=DirectClass");
1871 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1872 " Storage class=PseudoClass");
1873 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1874 " Image depth=%.20g",(double) image->depth);
1875 if (image->matte != MagickFalse)
1876 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1879 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1880 " Matte=MagickFalse");
1881 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1882 " BMP bits_per_pixel=%.20g",(double) bmp_info.bits_per_pixel);
1883 switch ((int) bmp_info.compression)
1887 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1888 " Compression=BI_RGB");
1893 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1894 " Compression=BI_RLE8");
1899 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1900 " Compression=BI_BITFIELDS");
1905 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1906 " Compression=UNKNOWN (%u)",bmp_info.compression);
1910 if (bmp_info.number_colors == 0)
1911 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1912 " Number_colors=unspecified");
1914 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1915 " Number_colors=%u",bmp_info.number_colors);
1917 (void) WriteBlob(image,2,(unsigned char *) "BM");
1918 (void) WriteBlobLSBLong(image,bmp_info.file_size);
1919 (void) WriteBlobLSBLong(image,bmp_info.ba_offset); /* always 0 */
1920 (void) WriteBlobLSBLong(image,bmp_info.offset_bits);
1924 Write 12-byte version 2 bitmap header.
1926 (void) WriteBlobLSBLong(image,bmp_info.size);
1927 (void) WriteBlobLSBShort(image,(unsigned short) bmp_info.width);
1928 (void) WriteBlobLSBShort(image,(unsigned short) bmp_info.height);
1929 (void) WriteBlobLSBShort(image,bmp_info.planes);
1930 (void) WriteBlobLSBShort(image,bmp_info.bits_per_pixel);
1935 Write 40-byte version 3+ bitmap header.
1937 (void) WriteBlobLSBLong(image,bmp_info.size);
1938 (void) WriteBlobLSBLong(image,(unsigned int) bmp_info.width);
1939 (void) WriteBlobLSBLong(image,(unsigned int) bmp_info.height);
1940 (void) WriteBlobLSBShort(image,bmp_info.planes);
1941 (void) WriteBlobLSBShort(image,bmp_info.bits_per_pixel);
1942 (void) WriteBlobLSBLong(image,bmp_info.compression);
1943 (void) WriteBlobLSBLong(image,bmp_info.image_size);
1944 (void) WriteBlobLSBLong(image,bmp_info.x_pixels);
1945 (void) WriteBlobLSBLong(image,bmp_info.y_pixels);
1946 (void) WriteBlobLSBLong(image,bmp_info.number_colors);
1947 (void) WriteBlobLSBLong(image,bmp_info.colors_important);
1949 if ((type > 3) && ((image->matte != MagickFalse) ||
1950 (have_color_info != MagickFalse)))
1953 Write the rest of the 108-byte BMP Version 4 header.
1955 (void) WriteBlobLSBLong(image,0x00ff0000U); /* Red mask */
1956 (void) WriteBlobLSBLong(image,0x0000ff00U); /* Green mask */
1957 (void) WriteBlobLSBLong(image,0x000000ffU); /* Blue mask */
1958 (void) WriteBlobLSBLong(image,0xff000000U); /* Alpha mask */
1959 (void) WriteBlobLSBLong(image,0x00000001U); /* CSType==Calib. RGB */
1960 (void) WriteBlobLSBLong(image,(unsigned int)
1961 image->chromaticity.red_primary.x*0x3ffffff);
1962 (void) WriteBlobLSBLong(image,(unsigned int)
1963 image->chromaticity.red_primary.y*0x3ffffff);
1964 (void) WriteBlobLSBLong(image,(unsigned int)
1965 (1.000f-(image->chromaticity.red_primary.x+
1966 image->chromaticity.red_primary.y)*0x3ffffff));
1967 (void) WriteBlobLSBLong(image,(unsigned int)
1968 image->chromaticity.green_primary.x*0x3ffffff);
1969 (void) WriteBlobLSBLong(image,(unsigned int)
1970 image->chromaticity.green_primary.y*0x3ffffff);
1971 (void) WriteBlobLSBLong(image,(unsigned int)
1972 (1.000f-(image->chromaticity.green_primary.x+
1973 image->chromaticity.green_primary.y)*0x3ffffff));
1974 (void) WriteBlobLSBLong(image,(unsigned int)
1975 image->chromaticity.blue_primary.x*0x3ffffff);
1976 (void) WriteBlobLSBLong(image,(unsigned int)
1977 image->chromaticity.blue_primary.y*0x3ffffff);
1978 (void) WriteBlobLSBLong(image,(unsigned int)
1979 (1.000f-(image->chromaticity.blue_primary.x+
1980 image->chromaticity.blue_primary.y)*0x3ffffff));
1981 (void) WriteBlobLSBLong(image,(unsigned int)
1982 bmp_info.gamma_scale.x*0xffff);
1983 (void) WriteBlobLSBLong(image,(unsigned int)
1984 bmp_info.gamma_scale.y*0xffff);
1985 (void) WriteBlobLSBLong(image,(unsigned int)
1986 bmp_info.gamma_scale.z*0xffff);
1987 if ((image->rendering_intent != UndefinedIntent) ||
1988 (profile != (StringInfo *) NULL))
1993 switch ((int) image->rendering_intent)
1995 case SaturationIntent:
1997 intent=LCS_GM_BUSINESS;
2000 case RelativeIntent:
2002 intent=LCS_GM_GRAPHICS;
2005 case PerceptualIntent:
2007 intent=LCS_GM_IMAGES;
2010 case AbsoluteIntent:
2012 intent=LCS_GM_ABS_COLORIMETRIC;
2021 (void) WriteBlobLSBLong(image,(unsigned int) intent);
2022 (void) WriteBlobLSBLong(image,0x00); /* dummy profile data */
2023 (void) WriteBlobLSBLong(image,0x00); /* dummy profile length */
2024 (void) WriteBlobLSBLong(image,0x00); /* reserved */
2027 if (image->storage_class == PseudoClass)
2033 Dump colormap to file.
2035 if (image->debug != MagickFalse)
2036 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2037 " Colormap: %.20g entries",(double) image->colors);
2038 bmp_colormap=(unsigned char *) AcquireQuantumMemory((size_t) (1UL <<
2039 bmp_info.bits_per_pixel),4*sizeof(*bmp_colormap));
2040 if (bmp_colormap == (unsigned char *) NULL)
2041 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
2043 for (i=0; i < (ssize_t) MagickMin((ssize_t) image->colors,(ssize_t) bmp_info.number_colors); i++)
2045 *q++=ScaleQuantumToChar(image->colormap[i].blue);
2046 *q++=ScaleQuantumToChar(image->colormap[i].green);
2047 *q++=ScaleQuantumToChar(image->colormap[i].red);
2049 *q++=(unsigned char) 0x0;
2051 for ( ; i < (ssize_t) (1UL << bmp_info.bits_per_pixel); i++)
2053 *q++=(unsigned char) 0x00;
2054 *q++=(unsigned char) 0x00;
2055 *q++=(unsigned char) 0x00;
2057 *q++=(unsigned char) 0x00;
2060 (void) WriteBlob(image,(size_t) (3*(1L << bmp_info.bits_per_pixel)),
2063 (void) WriteBlob(image,(size_t) (4*(1L << bmp_info.bits_per_pixel)),
2065 bmp_colormap=(unsigned char *) RelinquishMagickMemory(bmp_colormap);
2067 if (image->debug != MagickFalse)
2068 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2069 " Pixels: %u bytes",bmp_info.image_size);
2070 (void) WriteBlob(image,(size_t) bmp_info.image_size,pixels);
2071 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
2072 if (GetNextImageInList(image) == (Image *) NULL)
2074 image=SyncNextImageInList(image);
2075 status=SetImageProgress(image,SaveImagesTag,scene++,
2076 GetImageListLength(image));
2077 if (status == MagickFalse)
2079 } while (image_info->adjoin != MagickFalse);
2080 (void) CloseBlob(image);