2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6 % V V IIIII FFFFF FFFFF %
13 % Read/Write Khoros Visualization Image Format %
20 % Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
42 #include "MagickCore/studio.h"
43 #include "MagickCore/attribute.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/cache.h"
47 #include "MagickCore/color.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/magick.h"
58 #include "MagickCore/memory_.h"
59 #include "MagickCore/monitor.h"
60 #include "MagickCore/monitor-private.h"
61 #include "MagickCore/pixel-accessor.h"
62 #include "MagickCore/property.h"
63 #include "MagickCore/quantum-private.h"
64 #include "MagickCore/static.h"
65 #include "MagickCore/string_.h"
66 #include "MagickCore/module.h"
71 static MagickBooleanType
72 WriteVIFFImage(const ImageInfo *,Image *,ExceptionInfo *);
75 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
83 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
85 % IsVIFF() returns MagickTrue if the image format type, identified by the
86 % magick string, is VIFF.
88 % The format of the IsVIFF method is:
90 % MagickBooleanType IsVIFF(const unsigned char *magick,const size_t length)
92 % A description of each parameter follows:
94 % o magick: compare image format pattern against these bytes.
96 % o length: Specifies the length of the magick string.
99 static MagickBooleanType IsVIFF(const unsigned char *magick,const size_t length)
103 if (memcmp(magick,"\253\001",2) == 0)
109 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
113 % R e a d V I F F I m a g e %
117 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
119 % ReadVIFFImage() reads a Khoros Visualization image file and returns
120 % it. It allocates the memory necessary for the new Image structure and
121 % returns a pointer to the new image.
123 % The format of the ReadVIFFImage method is:
125 % Image *ReadVIFFImage(const ImageInfo *image_info,
126 % ExceptionInfo *exception)
128 % A description of each parameter follows:
130 % o image: Method ReadVIFFImage returns a pointer to the image after
131 % reading. A null image is returned if there is a memory shortage or if
132 % the image cannot be read.
134 % o image_info: the image info.
136 % o exception: return any errors or warnings in this structure.
139 static Image *ReadVIFFImage(const ImageInfo *image_info,
140 ExceptionInfo *exception)
142 #define VFF_CM_genericRGB 15
143 #define VFF_CM_ntscRGB 1
144 #define VFF_CM_NONE 0
145 #define VFF_DEP_DECORDER 0x4
146 #define VFF_DEP_NSORDER 0x8
147 #define VFF_DES_RAW 0
148 #define VFF_LOC_IMPLICIT 1
149 #define VFF_MAPTYP_NONE 0
150 #define VFF_MAPTYP_1_BYTE 1
151 #define VFF_MAPTYP_2_BYTE 2
152 #define VFF_MAPTYP_4_BYTE 4
153 #define VFF_MAPTYP_FLOAT 5
154 #define VFF_MAPTYP_DOUBLE 7
155 #define VFF_MS_NONE 0
156 #define VFF_MS_ONEPERBAND 1
157 #define VFF_MS_SHARED 3
158 #define VFF_TYP_BIT 0
159 #define VFF_TYP_1_BYTE 1
160 #define VFF_TYP_2_BYTE 2
161 #define VFF_TYP_4_BYTE 4
162 #define VFF_TYP_FLOAT 5
163 #define VFF_TYP_DOUBLE 9
165 typedef struct _ViffInfo
234 register unsigned char
257 assert(image_info != (const ImageInfo *) NULL);
258 assert(image_info->signature == MagickSignature);
259 if (image_info->debug != MagickFalse)
260 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
261 image_info->filename);
262 assert(exception != (ExceptionInfo *) NULL);
263 assert(exception->signature == MagickSignature);
264 image=AcquireImage(image_info,exception);
265 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
266 if (status == MagickFalse)
268 image=DestroyImageList(image);
269 return((Image *) NULL);
272 Read VIFF header (1024 bytes).
274 count=ReadBlob(image,1,&viff_info.identifier);
278 Verify VIFF identifier.
280 if ((count == 0) || ((unsigned char) viff_info.identifier != 0xab))
281 ThrowReaderException(CorruptImageError,"NotAVIFFImage");
283 Initialize VIFF image.
285 count=ReadBlob(image,7,buffer);
286 viff_info.file_type=buffer[0];
287 viff_info.release=buffer[1];
288 viff_info.version=buffer[2];
289 viff_info.machine_dependency=buffer[3];
290 count=ReadBlob(image,512,(unsigned char *) viff_info.comment);
291 viff_info.comment[511]='\0';
292 if (strlen(viff_info.comment) > 4)
293 (void) SetImageProperty(image,"comment",viff_info.comment,exception);
294 if ((viff_info.machine_dependency == VFF_DEP_DECORDER) ||
295 (viff_info.machine_dependency == VFF_DEP_NSORDER))
297 viff_info.rows=ReadBlobLSBLong(image);
298 viff_info.columns=ReadBlobLSBLong(image);
299 viff_info.subrows=ReadBlobLSBLong(image);
300 viff_info.x_offset=(int) ReadBlobLSBLong(image);
301 viff_info.y_offset=(int) ReadBlobLSBLong(image);
302 viff_info.x_bits_per_pixel=(float) ReadBlobLSBLong(image);
303 viff_info.y_bits_per_pixel=(float) ReadBlobLSBLong(image);
304 viff_info.location_type=ReadBlobLSBLong(image);
305 viff_info.location_dimension=ReadBlobLSBLong(image);
306 viff_info.number_of_images=ReadBlobLSBLong(image);
307 viff_info.number_data_bands=ReadBlobLSBLong(image);
308 viff_info.data_storage_type=ReadBlobLSBLong(image);
309 viff_info.data_encode_scheme=ReadBlobLSBLong(image);
310 viff_info.map_scheme=ReadBlobLSBLong(image);
311 viff_info.map_storage_type=ReadBlobLSBLong(image);
312 viff_info.map_rows=ReadBlobLSBLong(image);
313 viff_info.map_columns=ReadBlobLSBLong(image);
314 viff_info.map_subrows=ReadBlobLSBLong(image);
315 viff_info.map_enable=ReadBlobLSBLong(image);
316 viff_info.maps_per_cycle=ReadBlobLSBLong(image);
317 viff_info.color_space_model=ReadBlobLSBLong(image);
321 viff_info.rows=ReadBlobMSBLong(image);
322 viff_info.columns=ReadBlobMSBLong(image);
323 viff_info.subrows=ReadBlobMSBLong(image);
324 viff_info.x_offset=(int) ReadBlobMSBLong(image);
325 viff_info.y_offset=(int) ReadBlobMSBLong(image);
326 viff_info.x_bits_per_pixel=(float) ReadBlobMSBLong(image);
327 viff_info.y_bits_per_pixel=(float) ReadBlobMSBLong(image);
328 viff_info.location_type=ReadBlobMSBLong(image);
329 viff_info.location_dimension=ReadBlobMSBLong(image);
330 viff_info.number_of_images=ReadBlobMSBLong(image);
331 viff_info.number_data_bands=ReadBlobMSBLong(image);
332 viff_info.data_storage_type=ReadBlobMSBLong(image);
333 viff_info.data_encode_scheme=ReadBlobMSBLong(image);
334 viff_info.map_scheme=ReadBlobMSBLong(image);
335 viff_info.map_storage_type=ReadBlobMSBLong(image);
336 viff_info.map_rows=ReadBlobMSBLong(image);
337 viff_info.map_columns=ReadBlobMSBLong(image);
338 viff_info.map_subrows=ReadBlobMSBLong(image);
339 viff_info.map_enable=ReadBlobMSBLong(image);
340 viff_info.maps_per_cycle=ReadBlobMSBLong(image);
341 viff_info.color_space_model=ReadBlobMSBLong(image);
343 for (i=0; i < 420; i++)
344 (void) ReadBlobByte(image);
345 image->columns=viff_info.rows;
346 image->rows=viff_info.columns;
347 image->depth=viff_info.x_bits_per_pixel <= 8 ? 8UL :
348 MAGICKCORE_QUANTUM_DEPTH;
350 Verify that we can read this VIFF image.
352 number_pixels=(MagickSizeType) viff_info.columns*viff_info.rows;
353 if (number_pixels != (size_t) number_pixels)
354 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
355 if (number_pixels == 0)
356 ThrowReaderException(CoderError,"ImageColumnOrRowSizeIsNotSupported");
357 if ((viff_info.number_data_bands < 1) || (viff_info.number_data_bands > 4))
358 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
359 if ((viff_info.data_storage_type != VFF_TYP_BIT) &&
360 (viff_info.data_storage_type != VFF_TYP_1_BYTE) &&
361 (viff_info.data_storage_type != VFF_TYP_2_BYTE) &&
362 (viff_info.data_storage_type != VFF_TYP_4_BYTE) &&
363 (viff_info.data_storage_type != VFF_TYP_FLOAT) &&
364 (viff_info.data_storage_type != VFF_TYP_DOUBLE))
365 ThrowReaderException(CoderError,"DataStorageTypeIsNotSupported");
366 if (viff_info.data_encode_scheme != VFF_DES_RAW)
367 ThrowReaderException(CoderError,"DataEncodingSchemeIsNotSupported");
368 if ((viff_info.map_storage_type != VFF_MAPTYP_NONE) &&
369 (viff_info.map_storage_type != VFF_MAPTYP_1_BYTE) &&
370 (viff_info.map_storage_type != VFF_MAPTYP_2_BYTE) &&
371 (viff_info.map_storage_type != VFF_MAPTYP_4_BYTE) &&
372 (viff_info.map_storage_type != VFF_MAPTYP_FLOAT) &&
373 (viff_info.map_storage_type != VFF_MAPTYP_DOUBLE))
374 ThrowReaderException(CoderError,"MapStorageTypeIsNotSupported");
375 if ((viff_info.color_space_model != VFF_CM_NONE) &&
376 (viff_info.color_space_model != VFF_CM_ntscRGB) &&
377 (viff_info.color_space_model != VFF_CM_genericRGB))
378 ThrowReaderException(CoderError,"ColorspaceModelIsNotSupported");
379 if (viff_info.location_type != VFF_LOC_IMPLICIT)
380 ThrowReaderException(CoderError,"LocationTypeIsNotSupported");
381 if (viff_info.number_of_images != 1)
382 ThrowReaderException(CoderError,"NumberOfImagesIsNotSupported");
383 if (viff_info.map_rows == 0)
384 viff_info.map_scheme=VFF_MS_NONE;
385 switch ((int) viff_info.map_scheme)
389 if (viff_info.number_data_bands < 3)
392 Create linear color ramp.
394 image->colors=image->depth <= 8 ? 256UL : 65536UL;
395 if (viff_info.data_storage_type == VFF_TYP_BIT)
397 if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
398 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
402 case VFF_MS_ONEPERBAND:
409 Allocate VIFF colormap.
411 switch ((int) viff_info.map_storage_type)
413 case VFF_MAPTYP_1_BYTE: bytes_per_pixel=1; break;
414 case VFF_MAPTYP_2_BYTE: bytes_per_pixel=2; break;
415 case VFF_MAPTYP_4_BYTE: bytes_per_pixel=4; break;
416 case VFF_MAPTYP_FLOAT: bytes_per_pixel=4; break;
417 case VFF_MAPTYP_DOUBLE: bytes_per_pixel=8; break;
418 default: bytes_per_pixel=1; break;
420 image->colors=viff_info.map_columns;
421 if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
422 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
423 viff_colormap=(unsigned char *) AcquireQuantumMemory(image->colors,
424 viff_info.map_rows*bytes_per_pixel*sizeof(*viff_colormap));
425 if (viff_colormap == (unsigned char *) NULL)
426 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
428 Read VIFF raster colormap.
430 count=ReadBlob(image,bytes_per_pixel*image->colors*viff_info.map_rows,
433 if (*(char *) &lsb_first &&
434 ((viff_info.machine_dependency != VFF_DEP_DECORDER) &&
435 (viff_info.machine_dependency != VFF_DEP_NSORDER)))
436 switch ((int) viff_info.map_storage_type)
438 case VFF_MAPTYP_2_BYTE:
440 MSBOrderShort(viff_colormap,(bytes_per_pixel*image->colors*
441 viff_info.map_rows));
444 case VFF_MAPTYP_4_BYTE:
445 case VFF_MAPTYP_FLOAT:
447 MSBOrderLong(viff_colormap,(bytes_per_pixel*image->colors*
448 viff_info.map_rows));
453 for (i=0; i < (ssize_t) (viff_info.map_rows*image->colors); i++)
455 switch ((int) viff_info.map_storage_type)
457 case VFF_MAPTYP_2_BYTE: value=1.0*((short *) viff_colormap)[i]; break;
458 case VFF_MAPTYP_4_BYTE: value=1.0*((int *) viff_colormap)[i]; break;
459 case VFF_MAPTYP_FLOAT: value=((float *) viff_colormap)[i]; break;
460 case VFF_MAPTYP_DOUBLE: value=((double *) viff_colormap)[i]; break;
461 default: value=1.0*viff_colormap[i]; break;
463 if (i < (ssize_t) image->colors)
465 image->colormap[i].red=ScaleCharToQuantum((unsigned char) value);
466 image->colormap[i].green=
467 ScaleCharToQuantum((unsigned char) value);
468 image->colormap[i].blue=ScaleCharToQuantum((unsigned char) value);
471 if (i < (ssize_t) (2*image->colors))
472 image->colormap[i % image->colors].green=
473 ScaleCharToQuantum((unsigned char) value);
475 if (i < (ssize_t) (3*image->colors))
476 image->colormap[i % image->colors].blue=
477 ScaleCharToQuantum((unsigned char) value);
479 viff_colormap=(unsigned char *) RelinquishMagickMemory(viff_colormap);
483 ThrowReaderException(CoderError,"ColormapTypeNotSupported");
486 Initialize image structure.
488 image->matte=viff_info.number_data_bands == 4 ? MagickTrue : MagickFalse;
489 image->storage_class=
490 (viff_info.number_data_bands < 3 ? PseudoClass : DirectClass);
491 image->columns=viff_info.rows;
492 image->rows=viff_info.columns;
493 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
494 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
497 Allocate VIFF pixels.
499 switch ((int) viff_info.data_storage_type)
501 case VFF_TYP_2_BYTE: bytes_per_pixel=2; break;
502 case VFF_TYP_4_BYTE: bytes_per_pixel=4; break;
503 case VFF_TYP_FLOAT: bytes_per_pixel=4; break;
504 case VFF_TYP_DOUBLE: bytes_per_pixel=8; break;
505 default: bytes_per_pixel=1; break;
507 if (viff_info.data_storage_type == VFF_TYP_BIT)
508 max_packets=((image->columns+7UL) >> 3UL)*image->rows;
510 max_packets=(size_t) (number_pixels*viff_info.number_data_bands);
511 viff_pixels=(unsigned char *) AcquireQuantumMemory(max_packets,
512 bytes_per_pixel*sizeof(*viff_pixels));
513 if (viff_pixels == (unsigned char *) NULL)
514 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
515 count=ReadBlob(image,bytes_per_pixel*max_packets,viff_pixels);
517 if (*(char *) &lsb_first &&
518 ((viff_info.machine_dependency != VFF_DEP_DECORDER) &&
519 (viff_info.machine_dependency != VFF_DEP_NSORDER)))
520 switch ((int) viff_info.data_storage_type)
524 MSBOrderShort(viff_pixels,bytes_per_pixel*max_packets);
530 MSBOrderLong(viff_pixels,bytes_per_pixel*max_packets);
537 if ((viff_info.data_storage_type != VFF_TYP_1_BYTE) &&
538 (viff_info.map_scheme == VFF_MS_NONE))
544 Determine scale factor.
546 switch ((int) viff_info.data_storage_type)
548 case VFF_TYP_2_BYTE: value=1.0*((short *) viff_pixels)[0]; break;
549 case VFF_TYP_4_BYTE: value=1.0*((int *) viff_pixels)[0]; break;
550 case VFF_TYP_FLOAT: value=((float *) viff_pixels)[0]; break;
551 case VFF_TYP_DOUBLE: value=((double *) viff_pixels)[0]; break;
552 default: value=1.0*viff_pixels[0]; break;
556 for (i=0; i < (ssize_t) max_packets; i++)
558 switch ((int) viff_info.data_storage_type)
560 case VFF_TYP_2_BYTE: value=1.0*((short *) viff_pixels)[i]; break;
561 case VFF_TYP_4_BYTE: value=1.0*((int *) viff_pixels)[i]; break;
562 case VFF_TYP_FLOAT: value=((float *) viff_pixels)[i]; break;
563 case VFF_TYP_DOUBLE: value=((double *) viff_pixels)[i]; break;
564 default: value=1.0*viff_pixels[i]; break;
566 if (value > max_value)
569 if (value < min_value)
572 if ((min_value == 0) && (max_value == 0))
575 if (min_value == max_value)
577 scale_factor=(MagickRealType) QuantumRange/min_value;
581 scale_factor=(MagickRealType) QuantumRange/(max_value-min_value);
584 Convert pixels to Quantum size.
586 p=(unsigned char *) viff_pixels;
587 for (i=0; i < (ssize_t) max_packets; i++)
589 switch ((int) viff_info.data_storage_type)
591 case VFF_TYP_2_BYTE: value=1.0*((short *) viff_pixels)[i]; break;
592 case VFF_TYP_4_BYTE: value=1.0*((int *) viff_pixels)[i]; break;
593 case VFF_TYP_FLOAT: value=((float *) viff_pixels)[i]; break;
594 case VFF_TYP_DOUBLE: value=((double *) viff_pixels)[i]; break;
595 default: value=1.0*viff_pixels[i]; break;
597 if (viff_info.map_scheme == VFF_MS_NONE)
599 value=(value-min_value)*scale_factor;
600 if (value > QuantumRange)
606 *p=(unsigned char) value;
610 Convert VIFF raster image to pixel packets.
612 p=(unsigned char *) viff_pixels;
613 if (viff_info.data_storage_type == VFF_TYP_BIT)
616 Convert bitmap scanline.
618 (void) SetImageType(image,BilevelType,exception);
619 (void) SetImageType(image,PaletteType,exception);
620 for (y=0; y < (ssize_t) image->rows; y++)
622 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
623 if (q == (Quantum *) NULL)
625 for (x=0; x < (ssize_t) (image->columns-7); x+=8)
627 for (bit=0; bit < 8; bit++)
629 if (GetPixelIntensity(image,q) < ((MagickRealType) QuantumRange/2.0))
631 quantum=(size_t) GetPixelIndex(image,q);
633 SetPixelIndex(image,quantum,q);
635 q+=GetPixelChannels(image);
639 if ((image->columns % 8) != 0)
641 for (bit=0; bit < (ssize_t) (image->columns % 8); bit++)
642 if (GetPixelIntensity(image,q) < ((MagickRealType) QuantumRange/2.0))
644 quantum=(size_t) GetPixelIndex(image,q);
646 SetPixelIndex(image,quantum,q);
647 q+=GetPixelChannels(image);
651 if (SyncAuthenticPixels(image,exception) == MagickFalse)
653 if (image->previous == (Image *) NULL)
655 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
657 if (status == MagickFalse)
663 if (image->storage_class == PseudoClass)
664 for (y=0; y < (ssize_t) image->rows; y++)
666 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
667 if (q == (Quantum *) NULL)
669 for (x=0; x < (ssize_t) image->columns; x++)
671 SetPixelIndex(image,*p++,q);
672 q+=GetPixelChannels(image);
674 if (SyncAuthenticPixels(image,exception) == MagickFalse)
676 if (image->previous == (Image *) NULL)
678 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
680 if (status == MagickFalse)
687 Convert DirectColor scanline.
689 number_pixels=(MagickSizeType) image->columns*image->rows;
690 for (y=0; y < (ssize_t) image->rows; y++)
692 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
693 if (q == (Quantum *) NULL)
695 for (x=0; x < (ssize_t) image->columns; x++)
697 SetPixelRed(image,ScaleCharToQuantum(*p),q);
698 SetPixelGreen(image,ScaleCharToQuantum(*(p+number_pixels)),q);
699 SetPixelBlue(image,ScaleCharToQuantum(*(p+2*number_pixels)),q);
700 if (image->colors != 0)
702 SetPixelRed(image,image->colormap[(ssize_t)
703 GetPixelRed(image,q)].red,q);
704 SetPixelGreen(image,image->colormap[(ssize_t)
705 GetPixelGreen(image,q)].green,q);
706 SetPixelBlue(image,image->colormap[(ssize_t)
707 GetPixelBlue(image,q)].blue,q);
709 SetPixelAlpha(image,image->matte != MagickFalse ?
710 ScaleCharToQuantum(*(p+number_pixels*3)) : OpaqueAlpha,q);
712 q+=GetPixelChannels(image);
714 if (SyncAuthenticPixels(image,exception) == MagickFalse)
716 if (image->previous == (Image *) NULL)
718 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
720 if (status == MagickFalse)
725 viff_pixels=(unsigned char *) RelinquishMagickMemory(viff_pixels);
726 if (image->storage_class == PseudoClass)
727 (void) SyncImage(image,exception);
728 if (EOFBlob(image) != MagickFalse)
730 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
735 Proceed to next image.
737 if (image_info->number_scenes != 0)
738 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
740 count=ReadBlob(image,1,&viff_info.identifier);
741 if ((count != 0) && (viff_info.identifier == 0xab))
744 Allocate next image structure.
746 AcquireNextImage(image_info,image,exception);
747 if (GetNextImageInList(image) == (Image *) NULL)
749 image=DestroyImageList(image);
750 return((Image *) NULL);
752 image=SyncNextImageInList(image);
753 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
755 if (status == MagickFalse)
758 } while ((count != 0) && (viff_info.identifier == 0xab));
759 (void) CloseBlob(image);
760 return(GetFirstImageInList(image));
764 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
768 % R e g i s t e r V I F F I m a g e %
772 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
774 % RegisterVIFFImage() adds properties for the VIFF image format to
775 % the list of supported formats. The properties include the image format
776 % tag, a method to read and/or write the format, whether the format
777 % supports the saving of more than one frame to the same file or blob,
778 % whether the format supports native in-memory I/O, and a brief
779 % description of the format.
781 % The format of the RegisterVIFFImage method is:
783 % size_t RegisterVIFFImage(void)
786 ModuleExport size_t RegisterVIFFImage(void)
791 entry=SetMagickInfo("VIFF");
792 entry->decoder=(DecodeImageHandler *) ReadVIFFImage;
793 entry->encoder=(EncodeImageHandler *) WriteVIFFImage;
794 entry->magick=(IsImageFormatHandler *) IsVIFF;
795 entry->description=ConstantString("Khoros Visualization image");
796 entry->module=ConstantString("VIFF");
797 (void) RegisterMagickInfo(entry);
798 entry=SetMagickInfo("XV");
799 entry->decoder=(DecodeImageHandler *) ReadVIFFImage;
800 entry->encoder=(EncodeImageHandler *) WriteVIFFImage;
801 entry->description=ConstantString("Khoros Visualization image");
802 entry->module=ConstantString("VIFF");
803 (void) RegisterMagickInfo(entry);
804 return(MagickImageCoderSignature);
808 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
812 % U n r e g i s t e r V I F F I m a g e %
816 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
818 % UnregisterVIFFImage() removes format registrations made by the
819 % VIFF module from the list of supported formats.
821 % The format of the UnregisterVIFFImage method is:
823 % UnregisterVIFFImage(void)
826 ModuleExport void UnregisterVIFFImage(void)
828 (void) UnregisterMagickInfo("VIFF");
829 (void) UnregisterMagickInfo("XV");
833 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
837 % W r i t e V I F F I m a g e %
841 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
843 % WriteVIFFImage() writes an image to a file in the VIFF image format.
845 % The format of the WriteVIFFImage method is:
847 % MagickBooleanType WriteVIFFImage(const ImageInfo *image_info,
848 % Image *image,ExceptionInfo *exception)
850 % A description of each parameter follows.
852 % o image_info: the image info.
854 % o image: The image.
856 % o exception: return any errors or warnings in this structure.
860 static inline size_t MagickMin(const size_t x,const size_t y)
867 static MagickBooleanType WriteVIFFImage(const ImageInfo *image_info,
868 Image *image,ExceptionInfo *exception)
870 #define VFF_CM_genericRGB 15
871 #define VFF_CM_NONE 0
872 #define VFF_DEP_IEEEORDER 0x2
873 #define VFF_DES_RAW 0
874 #define VFF_LOC_IMPLICIT 1
875 #define VFF_MAPTYP_NONE 0
876 #define VFF_MAPTYP_1_BYTE 1
877 #define VFF_MS_NONE 0
878 #define VFF_MS_ONEPERBAND 1
879 #define VFF_TYP_BIT 0
880 #define VFF_TYP_1_BYTE 1
882 typedef struct _ViffInfo
934 register const Quantum
943 register unsigned char
957 Open output image file.
959 assert(image_info != (const ImageInfo *) NULL);
960 assert(image_info->signature == MagickSignature);
961 assert(image != (Image *) NULL);
962 assert(image->signature == MagickSignature);
963 if (image->debug != MagickFalse)
964 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
965 assert(exception != (ExceptionInfo *) NULL);
966 assert(exception->signature == MagickSignature);
967 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
968 if (status == MagickFalse)
970 (void) ResetMagickMemory(&viff_info,0,sizeof(ViffInfo));
975 Initialize VIFF image structure.
977 if (IsRGBColorspace(image->colorspace) == MagickFalse)
978 (void) TransformImageColorspace(image,RGBColorspace,exception);
979 if (IsImageGray(image,exception) != MagickFalse)
980 (void) SetImageStorageClass(image,DirectClass,exception);
981 viff_info.identifier=(char) 0xab;
982 viff_info.file_type=1;
985 viff_info.machine_dependency=VFF_DEP_IEEEORDER; /* IEEE byte ordering */
986 *viff_info.comment='\0';
987 value=GetImageProperty(image,"comment",exception);
988 if (value != (const char *) NULL)
989 (void) CopyMagickString(viff_info.comment,value,MagickMin(strlen(value),
991 viff_info.rows=image->columns;
992 viff_info.columns=image->rows;
994 viff_info.x_offset=(~0);
995 viff_info.y_offset=(~0);
996 viff_info.x_bits_per_pixel=0;
997 viff_info.y_bits_per_pixel=0;
998 viff_info.location_type=VFF_LOC_IMPLICIT;
999 viff_info.location_dimension=0;
1000 viff_info.number_of_images=1;
1001 viff_info.data_encode_scheme=VFF_DES_RAW;
1002 viff_info.map_scheme=VFF_MS_NONE;
1003 viff_info.map_storage_type=VFF_MAPTYP_NONE;
1004 viff_info.map_rows=0;
1005 viff_info.map_columns=0;
1006 viff_info.map_subrows=0;
1007 viff_info.map_enable=1; /* no colormap */
1008 viff_info.maps_per_cycle=0;
1009 number_pixels=(MagickSizeType) image->columns*image->rows;
1010 if (image->storage_class == DirectClass)
1013 Full color VIFF raster.
1015 viff_info.number_data_bands=image->matte ? 4UL : 3UL;
1016 viff_info.color_space_model=VFF_CM_genericRGB;
1017 viff_info.data_storage_type=VFF_TYP_1_BYTE;
1018 packets=viff_info.number_data_bands*number_pixels;
1022 viff_info.number_data_bands=1;
1023 viff_info.color_space_model=VFF_CM_NONE;
1024 viff_info.data_storage_type=VFF_TYP_1_BYTE;
1025 packets=number_pixels;
1026 if (IsImageGray(image,exception) == MagickFalse)
1029 Colormapped VIFF raster.
1031 viff_info.map_scheme=VFF_MS_ONEPERBAND;
1032 viff_info.map_storage_type=VFF_MAPTYP_1_BYTE;
1033 viff_info.map_rows=3;
1034 viff_info.map_columns=(unsigned int) image->colors;
1037 if (image->colors <= 2)
1040 Monochrome VIFF raster.
1042 viff_info.data_storage_type=VFF_TYP_BIT;
1043 packets=((image->columns+7) >> 3)*image->rows;
1047 Write VIFF image header (pad to 1024 bytes).
1049 buffer[0]=(unsigned char) viff_info.identifier;
1050 buffer[1]=(unsigned char) viff_info.file_type;
1051 buffer[2]=(unsigned char) viff_info.release;
1052 buffer[3]=(unsigned char) viff_info.version;
1053 buffer[4]=(unsigned char) viff_info.machine_dependency;
1054 buffer[5]=(unsigned char) viff_info.reserve[0];
1055 buffer[6]=(unsigned char) viff_info.reserve[1];
1056 buffer[7]=(unsigned char) viff_info.reserve[2];
1057 (void) WriteBlob(image,8,buffer);
1058 (void) WriteBlob(image,512,(unsigned char *) viff_info.comment);
1059 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.rows);
1060 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.columns);
1061 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.subrows);
1062 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.x_offset);
1063 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.y_offset);
1064 viff_info.x_bits_per_pixel=1U*(63 << 24) | (128 << 16);
1065 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.x_bits_per_pixel);
1066 viff_info.y_bits_per_pixel=1U*(63 << 24) | (128 << 16);
1067 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.y_bits_per_pixel);
1068 (void) WriteBlobMSBLong(image,viff_info.location_type);
1069 (void) WriteBlobMSBLong(image,viff_info.location_dimension);
1070 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.number_of_images);
1071 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.number_data_bands);
1072 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.data_storage_type);
1073 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.data_encode_scheme);
1074 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.map_scheme);
1075 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.map_storage_type);
1076 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.map_rows);
1077 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.map_columns);
1078 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.map_subrows);
1079 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.map_enable);
1080 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.maps_per_cycle);
1081 (void) WriteBlobMSBLong(image,(unsigned int) viff_info.color_space_model);
1082 for (i=0; i < 420; i++)
1083 (void) WriteBlobByte(image,'\0');
1085 Convert MIFF to VIFF raster pixels.
1087 viff_pixels=(unsigned char *) AcquireQuantumMemory((size_t) packets,
1088 sizeof(*viff_pixels));
1089 if (viff_pixels == (unsigned char *) NULL)
1090 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1092 if (image->storage_class == DirectClass)
1095 Convert DirectClass packet to VIFF RGB pixel.
1097 number_pixels=(MagickSizeType) image->columns*image->rows;
1098 for (y=0; y < (ssize_t) image->rows; y++)
1100 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1101 if (p == (const Quantum *) NULL)
1103 for (x=0; x < (ssize_t) image->columns; x++)
1105 *q=ScaleQuantumToChar(GetPixelRed(image,p));
1106 *(q+number_pixels)=ScaleQuantumToChar(GetPixelGreen(image,p));
1107 *(q+number_pixels*2)=ScaleQuantumToChar(GetPixelBlue(image,p));
1108 if (image->matte != MagickFalse)
1109 *(q+number_pixels*3)=ScaleQuantumToChar((Quantum)
1110 (GetPixelAlpha(image,p)));
1111 p+=GetPixelChannels(image);
1114 if (image->previous == (Image *) NULL)
1116 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1118 if (status == MagickFalse)
1124 if (IsImageGray(image,exception) == MagickFalse)
1130 Dump colormap to file.
1132 viff_colormap=(unsigned char *) AcquireQuantumMemory(image->colors,
1133 3*sizeof(*viff_colormap));
1134 if (viff_colormap == (unsigned char *) NULL)
1135 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1137 for (i=0; i < (ssize_t) image->colors; i++)
1138 *q++=ScaleQuantumToChar(image->colormap[i].red);
1139 for (i=0; i < (ssize_t) image->colors; i++)
1140 *q++=ScaleQuantumToChar(image->colormap[i].green);
1141 for (i=0; i < (ssize_t) image->colors; i++)
1142 *q++=ScaleQuantumToChar(image->colormap[i].blue);
1143 (void) WriteBlob(image,3*image->colors,viff_colormap);
1144 viff_colormap=(unsigned char *) RelinquishMagickMemory(viff_colormap);
1146 Convert PseudoClass packet to VIFF colormapped pixels.
1149 for (y=0; y < (ssize_t) image->rows; y++)
1151 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1152 if (p == (const Quantum *) NULL)
1154 for (x=0; x < (ssize_t) image->columns; x++)
1156 *q++=(unsigned char) GetPixelIndex(image,p);
1157 p+=GetPixelChannels(image);
1159 if (image->previous == (Image *) NULL)
1161 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1163 if (status == MagickFalse)
1169 if (image->colors <= 2)
1175 register unsigned char
1180 Convert PseudoClass image to a VIFF monochrome image.
1182 (void) SetImageType(image,BilevelType,exception);
1183 for (y=0; y < (ssize_t) image->rows; y++)
1185 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1186 if (p == (const Quantum *) NULL)
1190 for (x=0; x < (ssize_t) image->columns; x++)
1193 if (GetPixelIntensity(image,p) < ((MagickRealType) QuantumRange/2.0))
1202 p+=GetPixelChannels(image);
1205 *q++=byte >> (8-bit);
1206 if (image->previous == (Image *) NULL)
1208 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType)
1210 if (status == MagickFalse)
1218 Convert PseudoClass packet to VIFF grayscale pixel.
1220 for (y=0; y < (ssize_t) image->rows; y++)
1222 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1223 if (p == (const Quantum *) NULL)
1225 for (x=0; x < (ssize_t) image->columns; x++)
1227 *q++=(unsigned char) GetPixelIntensity(image,p);
1228 p+=GetPixelChannels(image);
1230 if (image->previous == (Image *) NULL)
1232 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType)
1234 if (status == MagickFalse)
1239 (void) WriteBlob(image,(size_t) packets,viff_pixels);
1240 viff_pixels=(unsigned char *) RelinquishMagickMemory(viff_pixels);
1241 if (GetNextImageInList(image) == (Image *) NULL)
1243 image=SyncNextImageInList(image);
1244 status=SetImageProgress(image,SaveImagesTag,scene++,
1245 GetImageListLength(image));
1246 if (status == MagickFalse)
1248 } while (image_info->adjoin != MagickFalse);
1249 (void) CloseBlob(image);