2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read GIMP XCF 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/blob.h"
44 #include "MagickCore/blob-private.h"
45 #include "MagickCore/cache.h"
46 #include "MagickCore/color.h"
47 #include "MagickCore/composite.h"
48 #include "MagickCore/exception.h"
49 #include "MagickCore/exception-private.h"
50 #include "MagickCore/image.h"
51 #include "MagickCore/image-private.h"
52 #include "MagickCore/list.h"
53 #include "MagickCore/magick.h"
54 #include "MagickCore/memory_.h"
55 #include "MagickCore/pixel.h"
56 #include "MagickCore/pixel-accessor.h"
57 #include "MagickCore/quantize.h"
58 #include "MagickCore/quantum-private.h"
59 #include "MagickCore/static.h"
60 #include "MagickCore/string_.h"
61 #include "MagickCore/module.h"
77 PROP_ACTIVE_LAYER = 2,
78 PROP_ACTIVE_CHANNEL = 3,
80 PROP_FLOATING_SELECTION = 5,
85 PROP_PRESERVE_TRANSPARENCY = 10,
89 PROP_SHOW_MASKED = 14,
92 PROP_COMPRESSION = 17,
106 COMPRESS_ZLIB = 2, /* unused */
107 COMPRESS_FRACTAL = 3 /* unused */
108 } XcfCompressionType;
161 #define TILE_WIDTH 64
162 #define TILE_HEIGHT 64
174 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
182 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
184 % IsXCF() returns MagickTrue if the image format type, identified by the
185 % magick string, is XCF (GIMP native format).
187 % The format of the IsXCF method is:
189 % MagickBooleanType IsXCF(const unsigned char *magick,const size_t length)
191 % A description of each parameter follows:
193 % o magick: compare image format pattern against these bytes.
195 % o length: Specifies the length of the magick string.
199 static MagickBooleanType IsXCF(const unsigned char *magick,const size_t length)
203 if (LocaleNCompare((char *) magick,"gimp xcf",8) == 0)
216 GIMP_DIFFERENCE_MODE,
219 GIMP_DARKEN_ONLY_MODE,
220 GIMP_LIGHTEN_ONLY_MODE,
222 GIMP_SATURATION_MODE,
229 } GimpLayerModeEffects;
232 Simple utility routine to convert between PSD blending modes and
233 ImageMagick compositing operators
235 static CompositeOperator GIMPBlendModeToCompositeOperator(
240 case GIMP_NORMAL_MODE: return( OverCompositeOp );
241 case GIMP_DISSOLVE_MODE: return( DissolveCompositeOp );
242 case GIMP_MULTIPLY_MODE: return( MultiplyCompositeOp );
243 case GIMP_SCREEN_MODE: return( ScreenCompositeOp );
244 case GIMP_OVERLAY_MODE: return( OverlayCompositeOp );
245 case GIMP_DIFFERENCE_MODE: return( DifferenceCompositeOp );
246 case GIMP_ADDITION_MODE: return( ModulusAddCompositeOp );
247 case GIMP_SUBTRACT_MODE: return( ModulusSubtractCompositeOp );
248 case GIMP_DARKEN_ONLY_MODE: return( DarkenCompositeOp );
249 case GIMP_LIGHTEN_ONLY_MODE:return( LightenCompositeOp );
250 case GIMP_HUE_MODE: return( HueCompositeOp );
251 case GIMP_SATURATION_MODE: return( SaturateCompositeOp );
252 case GIMP_COLOR_MODE: return( ColorizeCompositeOp );
253 case GIMP_DODGE_MODE: return( ColorDodgeCompositeOp );
254 case GIMP_BURN_MODE: return( ColorBurnCompositeOp );
255 case GIMP_HARDLIGHT_MODE: return( HardLightCompositeOp );
256 case GIMP_DIVIDE_MODE: return( DivideDstCompositeOp );
257 /* these are the ones we don't support...yet */
258 case GIMP_BEHIND_MODE: return( OverCompositeOp );
259 case GIMP_VALUE_MODE: return( OverCompositeOp );
261 return(OverCompositeOp);
266 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
270 + R e a d B l o b S t r i n g W i t h L o n g S i z e %
274 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
276 % ReadBlobStringWithLongSize reads characters from a blob or file
277 % starting with a ssize_t length byte and then characters to that length
279 % The format of the ReadBlobStringWithLongSize method is:
281 % char *ReadBlobStringWithLongSize(Image *image,char *string)
283 % A description of each parameter follows:
285 % o image: the image.
287 % o string: the address of a character buffer.
291 static inline size_t MagickMin(const size_t x,const size_t y)
298 static char *ReadBlobStringWithLongSize(Image *image,char *string,size_t max,
299 ExceptionInfo *exception)
313 assert(image != (Image *) NULL);
314 assert(image->signature == MagickSignature);
316 if (image->debug != MagickFalse)
317 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
318 length=ReadBlobMSBLong(image);
319 for (i=0; i < (ssize_t) MagickMin(length,max-1); i++)
321 c=ReadBlobByte(image);
323 return((char *) NULL);
327 offset=SeekBlob(image,(MagickOffsetType) (length-i),SEEK_CUR);
329 (void) ThrowMagickException(exception,GetMagickModule(),
330 CorruptImageError,"ImproperImageHeader","`%s'",image->filename);
334 static MagickBooleanType load_tile(Image *image,Image *tile_image,
335 XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
336 ExceptionInfo *exception)
357 xcfdata=(XCFPixelInfo *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
358 if (xcfdata == (XCFPixelInfo *) NULL)
359 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
362 graydata=(unsigned char *) xcfdata; /* used by gray and indexed */
363 count=ReadBlob(image,data_length,(unsigned char *) xcfdata);
364 if (count != (ssize_t) data_length)
365 ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
367 for (y=0; y < (ssize_t) tile_image->rows; y++)
369 q=GetAuthenticPixels(tile_image,0,y,tile_image->columns,1,exception);
370 if (q == (Quantum *) NULL)
372 if (inDocInfo->image_type == GIMP_GRAY)
374 for (x=0; x < (ssize_t) tile_image->columns; x++)
376 SetPixelGray(tile_image,ScaleCharToQuantum(*graydata),q);
377 SetPixelAlpha(tile_image,ScaleCharToQuantum((unsigned char)
378 inLayerInfo->alpha),q);
380 q+=GetPixelChannels(tile_image);
384 if (inDocInfo->image_type == GIMP_RGB)
386 for (x=0; x < (ssize_t) tile_image->columns; x++)
388 SetPixelRed(tile_image,ScaleCharToQuantum(xcfdata->red),q);
389 SetPixelGreen(tile_image,ScaleCharToQuantum(xcfdata->green),q);
390 SetPixelBlue(tile_image,ScaleCharToQuantum(xcfdata->blue),q);
391 SetPixelAlpha(tile_image,xcfdata->alpha == 255U ? TransparentAlpha :
392 ScaleCharToQuantum((unsigned char) inLayerInfo->alpha),q);
394 q+=GetPixelChannels(tile_image);
397 if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
400 xcfodata=(XCFPixelInfo *) RelinquishMagickMemory(xcfodata);
404 static MagickBooleanType load_tile_rle(Image *image,Image *tile_image,
405 XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
406 ExceptionInfo *exception)
433 bytes_per_pixel=(ssize_t) inDocInfo->bytes_per_pixel;
434 xcfdata=(unsigned char *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
435 if (xcfdata == (unsigned char *) NULL)
436 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
439 count=ReadBlob(image, (size_t) data_length, xcfdata);
440 xcfdatalimit = xcfodata+count-1;
441 alpha=ScaleCharToQuantum((unsigned char) inLayerInfo->alpha);
442 for (i=0; i < (ssize_t) bytes_per_pixel; i++)
444 q=GetAuthenticPixels(tile_image,0,0,tile_image->columns,tile_image->rows,
446 if (q == (Quantum *) NULL)
448 size=(MagickOffsetType) tile_image->rows*tile_image->columns;
451 if (xcfdata > xcfdatalimit)
454 length=(size_t) pixel;
457 length=255-(length-1);
460 if (xcfdata >= xcfdatalimit)
462 length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
468 if (&xcfdata[length-1] > xcfdatalimit)
477 if (inDocInfo->image_type != GIMP_GRAY)
479 SetPixelRed(tile_image,ScaleCharToQuantum(data),q);
480 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
481 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
482 SetPixelAlpha(tile_image,data == 255U ? alpha :
483 ScaleCharToQuantum(data),q);
487 SetPixelGray(tile_image,ScaleCharToQuantum(data),q);
488 SetPixelAlpha(tile_image,data == 255U ? alpha :
489 ScaleCharToQuantum(data),q);
495 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
500 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
505 SetPixelAlpha(tile_image,data == 255U ? alpha :
506 ScaleCharToQuantum(data),q);
510 q+=GetPixelChannels(tile_image);
518 if (xcfdata >= xcfdatalimit)
520 length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
526 if (xcfdata > xcfdatalimit)
529 for (j=0; j < (ssize_t) length; j++)
536 if (inDocInfo->image_type != GIMP_GRAY)
538 SetPixelRed(tile_image,ScaleCharToQuantum(data),q);
539 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
540 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
541 SetPixelAlpha(tile_image,data == 255U ? alpha :
542 ScaleCharToQuantum(data),q);
546 SetPixelGray(tile_image,ScaleCharToQuantum(data),q);
547 SetPixelAlpha(tile_image,data == 255U ? alpha :
548 ScaleCharToQuantum(data),q);
554 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
559 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
564 SetPixelAlpha(tile_image,data == 255U ? alpha :
565 ScaleCharToQuantum(data),q);
569 q+=GetPixelChannels(tile_image);
573 if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
576 xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
580 if (xcfodata != (unsigned char *) NULL)
581 xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
585 static MagickBooleanType load_level(Image *image,XCFDocInfo *inDocInfo,
586 XCFLayerInfo *inLayerInfo,ExceptionInfo *exception)
615 /* start reading the data */
616 width=ReadBlobMSBLong(image);
617 height=ReadBlobMSBLong(image);
619 /* read in the first tile offset.
620 * if it is '0', then this tile level is empty
621 * and we can simply return.
623 offset=(MagickOffsetType) ReadBlobMSBLong(image);
626 /* Initialise the reference for the in-memory tile-compression
628 ntile_rows=(height+TILE_HEIGHT-1)/TILE_HEIGHT;
629 ntile_cols=(width+TILE_WIDTH-1)/TILE_WIDTH;
630 ntiles=ntile_rows*ntile_cols;
631 for (i = 0; i < (ssize_t) ntiles; i++)
635 ThrowBinaryException(CorruptImageError,"NotEnoughTiles",image->filename);
636 /* save the current position as it is where the
637 * next tile offset is stored.
639 saved_pos=TellBlob(image);
640 /* read in the offset of the next tile so we can calculate the amount
641 of data needed for this tile*/
642 offset2=(MagickOffsetType)ReadBlobMSBLong(image);
643 /* if the offset is 0 then we need to read in the maximum possible
644 allowing for negative compression */
646 offset2=(MagickOffsetType) (offset + TILE_WIDTH * TILE_WIDTH * 4* 1.5);
647 /* seek to the tile offset */
648 offset=SeekBlob(image, offset, SEEK_SET);
651 Allocate the image for the tile. NOTE: the last tile in a row or
652 column may not be a full tile!
654 tile_image_width=(size_t) (destLeft == (int) ntile_cols-1 ?
655 (int) width % TILE_WIDTH : TILE_WIDTH);
656 if (tile_image_width == 0)
657 tile_image_width=TILE_WIDTH;
658 tile_image_height = (size_t) (destTop == (int) ntile_rows-1 ?
659 (int) height % TILE_HEIGHT : TILE_HEIGHT);
660 if (tile_image_height == 0)
661 tile_image_height=TILE_HEIGHT;
662 tile_image=CloneImage(inLayerInfo->image,tile_image_width,
663 tile_image_height,MagickTrue,exception);
665 /* read in the tile */
666 switch (inDocInfo->compression)
669 if (load_tile(image,tile_image,inDocInfo,inLayerInfo,(size_t) (offset2-offset),exception) == 0)
673 if (load_tile_rle (image,tile_image,inDocInfo,inLayerInfo,
674 (int) (offset2-offset),exception) == 0)
678 ThrowBinaryException(CoderError,"ZipCompressNotSupported",
680 case COMPRESS_FRACTAL:
681 ThrowBinaryException(CoderError,"FractalCompressNotSupported",
685 /* composite the tile onto the layer's image, and then destroy it */
686 (void) CompositeImage(inLayerInfo->image,tile_image,CopyCompositeOp,
687 MagickTrue,destLeft * TILE_WIDTH,destTop*TILE_HEIGHT,exception);
688 tile_image=DestroyImage(tile_image);
690 /* adjust tile position */
692 if (destLeft >= (int) ntile_cols)
697 if (status != MagickFalse)
699 /* restore the saved position so we'll be ready to
700 * read the next offset.
702 offset=SeekBlob(image, saved_pos, SEEK_SET);
703 /* read in the offset of the next tile */
704 offset=(MagickOffsetType) ReadBlobMSBLong(image);
707 ThrowBinaryException(CorruptImageError,"CorruptImage",image->filename)
711 static MagickBooleanType load_hierarchy(Image *image,XCFDocInfo *inDocInfo,
712 XCFLayerInfo *inLayer, ExceptionInfo *exception)
724 width=ReadBlobMSBLong(image);
726 height=ReadBlobMSBLong(image);
728 bytes_per_pixel=inDocInfo->bytes_per_pixel=ReadBlobMSBLong(image);
729 (void) bytes_per_pixel;
731 /* load in the levels...we make sure that the number of levels
732 * calculated when the TileManager was created is the same
733 * as the number of levels found in the file.
735 offset=(MagickOffsetType) ReadBlobMSBLong(image); /* top level */
737 /* discard offsets for layers below first, if any.
741 junk=(MagickOffsetType) ReadBlobMSBLong(image);
745 /* save the current position as it is where the
746 * next level offset is stored.
748 saved_pos=TellBlob(image);
750 /* seek to the level offset */
751 offset=SeekBlob(image, offset, SEEK_SET);
753 /* read in the level */
754 if (load_level (image, inDocInfo, inLayer, exception) == 0)
756 /* restore the saved position so we'll be ready to
757 * read the next offset.
759 offset=SeekBlob(image, saved_pos, SEEK_SET);
763 static MagickBooleanType ReadOneLayer(const ImageInfo *image_info,Image* image,
764 XCFDocInfo* inDocInfo,XCFLayerInfo *outLayer,const ssize_t layer,
765 ExceptionInfo *exception )
777 /* clear the block! */
778 (void) ResetMagickMemory( outLayer, 0, sizeof( XCFLayerInfo ) );
779 /* read in the layer width, height, type and name */
780 outLayer->width = ReadBlobMSBLong(image);
781 outLayer->height = ReadBlobMSBLong(image);
782 outLayer->type = ReadBlobMSBLong(image);
783 (void) ReadBlobStringWithLongSize(image, outLayer->name,
784 sizeof(outLayer->name),exception);
785 /* read the layer properties! */
787 while ( (foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse) ) {
788 PropType prop_type = (PropType) ReadBlobMSBLong(image);
789 size_t prop_size = ReadBlobMSBLong(image);
795 case PROP_ACTIVE_LAYER:
796 outLayer->active = 1;
798 case PROP_FLOATING_SELECTION:
799 outLayer->floating_offset = ReadBlobMSBLong(image);
802 outLayer->alpha = ReadBlobMSBLong(image);
805 outLayer->visible = ReadBlobMSBLong(image);
808 outLayer->linked = ReadBlobMSBLong(image);
810 case PROP_PRESERVE_TRANSPARENCY:
811 outLayer->preserve_trans = ReadBlobMSBLong(image);
813 case PROP_APPLY_MASK:
814 outLayer->apply_mask = ReadBlobMSBLong(image);
817 outLayer->edit_mask = ReadBlobMSBLong(image);
820 outLayer->show_mask = ReadBlobMSBLong(image);
823 outLayer->offset_x = (int) ReadBlobMSBLong(image);
824 outLayer->offset_y = (int) ReadBlobMSBLong(image);
827 outLayer->mode = ReadBlobMSBLong(image);
830 outLayer->preserve_trans = ReadBlobMSBLong(image);
834 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
835 ThrowFileException(exception,CorruptImageError,
836 "UnexpectedEndOfFile",image->filename);
839 ssize_t base = info->cp;
841 while (info->cp - base < prop_size)
843 p = xcf_load_parasite(info);
844 gimp_drawable_parasite_attach(GIMP_DRAWABLE(layer), p);
845 gimp_parasite_free(p);
847 if (info->cp - base != prop_size)
848 g_message ("Error detected while loading a layer's parasites");
853 /* g_message ("unexpected/unknown layer property: %d (skipping)",
860 /* read over it... */
861 while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
863 amount = (ssize_t) MagickMin(16, prop_size);
864 amount = ReadBlob(image, (size_t) amount, (unsigned char *) &buf);
866 ThrowBinaryException(CorruptImageError,"CorruptImage",
868 prop_size -= (size_t) MagickMin(16, (size_t) amount);
875 if (foundPropEnd == MagickFalse)
877 /* allocate the image for this layer */
878 if (image_info->number_scenes != 0)
883 scene=inDocInfo->number_layers-layer-1;
884 if (scene > (ssize_t) (image_info->scene+image_info->number_scenes-1))
886 outLayer->image=CloneImage(image,0,0,MagickTrue,exception);
887 if (outLayer->image == (Image *) NULL)
889 outLayer->image->page.x=outLayer->offset_x;
890 outLayer->image->page.y=outLayer->offset_y;
891 outLayer->image->page.width=outLayer->width;
892 outLayer->image->page.height=outLayer->height;
896 outLayer->image=CloneImage(image,outLayer->width, outLayer->height,MagickTrue,
898 if (outLayer->image == (Image *) NULL)
900 /* clear the image based on the layer opacity */
901 outLayer->image->background_color.alpha=
902 ScaleCharToQuantum((unsigned char) outLayer->alpha);
903 (void) SetImageBackgroundColor(outLayer->image,exception);
905 outLayer->image->page.x=outLayer->offset_x;
906 outLayer->image->page.y=outLayer->offset_y;
907 outLayer->image->page.width=outLayer->width;
908 outLayer->image->page.height=outLayer->height;
909 /* set the compositing mode */
910 outLayer->image->compose = GIMPBlendModeToCompositeOperator( outLayer->mode );
911 if ( outLayer->visible == MagickFalse )
913 /* BOGUS: should really be separate member var! */
914 outLayer->image->compose = NoCompositeOp;
917 /* read the hierarchy and layer mask offsets */
918 hierarchy_offset = ReadBlobMSBLong(image);
919 layer_mask_offset = ReadBlobMSBLong(image);
921 /* read in the hierarchy */
922 offset=SeekBlob(image, (MagickOffsetType) hierarchy_offset, SEEK_SET);
924 (void) ThrowMagickException(exception,GetMagickModule(),
925 CorruptImageError,"InvalidImageHeader","`%s'",image->filename);
926 if (load_hierarchy (image, inDocInfo, outLayer, exception) == 0)
929 /* read in the layer mask */
930 if (layer_mask_offset != 0)
932 offset=SeekBlob(image, (MagickOffsetType) layer_mask_offset, SEEK_SET);
934 #if 0 /* BOGUS: support layer masks! */
935 layer_mask = xcf_load_layer_mask (info, gimage);
939 /* set the offsets of the layer_mask */
940 GIMP_DRAWABLE (layer_mask)->offset_x = GIMP_DRAWABLE (layer)->offset_x;
941 GIMP_DRAWABLE (layer_mask)->offset_y = GIMP_DRAWABLE (layer)->offset_y;
943 gimp_layer_add_mask (layer, layer_mask, MagickFalse);
945 layer->mask->apply_mask = apply_mask;
946 layer->mask->edit_mask = edit_mask;
947 layer->mask->show_mask = show_mask;
951 /* attach the floating selection... */
952 #if 0 /* BOGUS: we may need to read this, even if we don't support it! */
953 if (add_floating_sel)
955 GimpLayer *floating_sel;
957 floating_sel = info->floating_sel;
958 floating_sel_attach (floating_sel, GIMP_DRAWABLE (layer));
966 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
970 % R e a d X C F I m a g e %
974 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
976 % ReadXCFImage() reads a GIMP (GNU Image Manipulation Program) image
977 % file and returns it. It allocates the memory necessary for the new Image
978 % structure and returns a pointer to the new image.
980 % The format of the ReadXCFImage method is:
982 % image=ReadXCFImage(image_info)
984 % A description of each parameter follows:
986 % o image_info: the image info.
988 % o exception: return any errors or warnings in this structure.
991 static Image *ReadXCFImage(const ImageInfo *image_info,ExceptionInfo *exception)
1024 assert(image_info != (const ImageInfo *) NULL);
1025 assert(image_info->signature == MagickSignature);
1026 if (image_info->debug != MagickFalse)
1027 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
1028 image_info->filename);
1029 assert(exception != (ExceptionInfo *) NULL);
1030 assert(exception->signature == MagickSignature);
1031 image=AcquireImage(image_info,exception);
1032 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
1033 if (status == MagickFalse)
1035 image=DestroyImageList(image);
1036 return((Image *) NULL);
1038 count=ReadBlob(image,14,(unsigned char *) magick);
1040 (LocaleNCompare((char *) magick,"gimp xcf",8) != 0))
1041 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1042 (void) ResetMagickMemory(&doc_info,0,sizeof(XCFDocInfo));
1043 doc_info.width=ReadBlobMSBLong(image);
1044 doc_info.height=ReadBlobMSBLong(image);
1045 if ((doc_info.width > 262144) || (doc_info.height > 262144))
1046 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1047 doc_info.image_type=ReadBlobMSBLong(image);
1049 Initialize image attributes.
1051 image->columns=doc_info.width;
1052 image->rows=doc_info.height;
1053 image_type=doc_info.image_type;
1054 doc_info.file_size=GetBlobSize(image);
1055 image->compression=NoCompression;
1057 if (image_type == GIMP_RGB)
1058 SetImageColorspace(image,sRGBColorspace,exception);
1060 if (image_type == GIMP_GRAY)
1061 SetImageColorspace(image,GRAYColorspace,exception);
1063 if (image_type == GIMP_INDEXED)
1064 ThrowReaderException(CoderError,"ColormapTypeNotSupported");
1065 (void) SetImageBackgroundColor(image,exception);
1066 image->alpha_trait=BlendPixelTrait;
1070 while ((foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse))
1072 PropType prop_type = (PropType) ReadBlobMSBLong(image);
1073 size_t prop_size = ReadBlobMSBLong(image);
1082 /* Cannot rely on prop_size here--the value is set incorrectly
1083 by some Gimp versions.
1085 size_t num_colours = ReadBlobMSBLong(image);
1086 if (DiscardBlobBytes(image,3*num_colours) == MagickFalse)
1087 ThrowFileException(exception,CorruptImageError,
1088 "UnexpectedEndOfFile",image->filename);
1090 if (info->file_version == 0)
1094 g_message (_("XCF warning: version 0 of XCF file format\n"
1095 "did not save indexed colormaps correctly.\n"
1096 "Substituting grayscale map."));
1098 xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
1099 gimage->cmap = g_new (guchar, gimage->num_cols*3);
1100 xcf_seek_pos (info, info->cp + gimage->num_cols);
1101 for (i = 0; i<gimage->num_cols; i++)
1103 gimage->cmap[i*3+0] = i;
1104 gimage->cmap[i*3+1] = i;
1105 gimage->cmap[i*3+2] = i;
1111 xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
1112 gimage->cmap = g_new (guchar, gimage->num_cols*3);
1114 xcf_read_int8 (info->fp,
1115 (guint8*) gimage->cmap, gimage->num_cols*3);
1120 case PROP_COMPRESSION:
1122 doc_info.compression = ReadBlobByte(image);
1123 if ((doc_info.compression != COMPRESS_NONE) &&
1124 (doc_info.compression != COMPRESS_RLE) &&
1125 (doc_info.compression != COMPRESS_ZLIB) &&
1126 (doc_info.compression != COMPRESS_FRACTAL))
1127 ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
1133 /* just skip it - we don't care about guides */
1134 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1135 ThrowFileException(exception,CorruptImageError,
1136 "UnexpectedEndOfFile",image->filename);
1140 case PROP_RESOLUTION:
1142 /* float xres = (float) */ (void) ReadBlobMSBLong(image);
1143 /* float yres = (float) */ (void) ReadBlobMSBLong(image);
1146 if (xres < GIMP_MIN_RESOLUTION || xres > GIMP_MAX_RESOLUTION ||
1147 yres < GIMP_MIN_RESOLUTION || yres > GIMP_MAX_RESOLUTION)
1149 g_message ("Warning, resolution out of range in XCF file");
1150 xres = gimage->gimp->config->default_xresolution;
1151 yres = gimage->gimp->config->default_yresolution;
1156 /* BOGUS: we don't write these yet because we aren't
1157 reading them properly yet :(
1158 image->resolution.x = xres;
1159 image->resolution.y = yres;
1166 /* we need to read it, even if we ignore it */
1167 /*size_t tattoo_state = */ (void) ReadBlobMSBLong(image);
1171 case PROP_PARASITES:
1173 /* BOGUS: we may need these for IPTC stuff */
1174 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1175 ThrowFileException(exception,CorruptImageError,
1176 "UnexpectedEndOfFile",image->filename);
1178 gssize_t base = info->cp;
1181 while (info->cp - base < prop_size)
1183 p = xcf_load_parasite (info);
1184 gimp_image_parasite_attach (gimage, p);
1185 gimp_parasite_free (p);
1187 if (info->cp - base != prop_size)
1188 g_message ("Error detected while loading an image's parasites");
1195 /* BOGUS: ignore for now... */
1196 /*size_t unit = */ (void) ReadBlobMSBLong(image);
1202 /* BOGUS: just skip it for now */
1203 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1204 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
1208 PathList *paths = xcf_load_bzpaths (gimage, info);
1209 gimp_image_set_paths (gimage, paths);
1214 case PROP_USER_UNIT:
1216 char unit_string[1000];
1217 /*BOGUS: ignored for now */
1218 /*float factor = (float) */ (void) ReadBlobMSBLong(image);
1219 /* size_t digits = */ (void) ReadBlobMSBLong(image);
1221 (void) ReadBlobStringWithLongSize(image, unit_string,
1222 sizeof(unit_string),exception);
1231 /* read over it... */
1232 while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
1234 amount=(ssize_t) MagickMin(16, prop_size);
1235 amount=(ssize_t) ReadBlob(image,(size_t) amount,(unsigned char *) &buf);
1237 ThrowReaderException(CorruptImageError,"CorruptImage");
1238 prop_size -= (size_t) MagickMin(16,(size_t) amount);
1244 if (foundPropEnd == MagickFalse)
1245 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1247 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
1249 ; /* do nothing, were just pinging! */
1255 foundAllLayers = MagickFalse,
1259 oldPos=TellBlob(image);
1269 ssize_t offset = (int) ReadBlobMSBLong(image);
1271 foundAllLayers=MagickTrue;
1274 if (EOFBlob(image) != MagickFalse)
1276 ThrowFileException(exception,CorruptImageError,
1277 "UnexpectedEndOfFile",image->filename);
1280 } while (foundAllLayers == MagickFalse);
1281 doc_info.number_layers=number_layers;
1282 offset=SeekBlob(image,oldPos,SEEK_SET); /* restore the position! */
1284 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1285 /* allocate our array of layer info blocks */
1286 length=(size_t) number_layers;
1287 layer_info=(XCFLayerInfo *) AcquireQuantumMemory(length,
1288 sizeof(*layer_info));
1289 if (layer_info == (XCFLayerInfo *) NULL)
1290 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1291 (void) ResetMagickMemory(layer_info,0,number_layers*sizeof(XCFLayerInfo));
1301 /* read in the offset of the next layer */
1302 offset=(MagickOffsetType) ReadBlobMSBLong(image);
1303 /* if the offset is 0 then we are at the end
1304 * of the layer list.
1308 /* save the current position as it is where the
1309 * next layer offset is stored.
1311 saved_pos=TellBlob(image);
1312 /* seek to the layer offset */
1313 offset=SeekBlob(image,offset,SEEK_SET);
1314 /* read in the layer */
1315 layer_ok=ReadOneLayer(image_info,image,&doc_info,
1316 &layer_info[current_layer],current_layer,exception);
1317 if (layer_ok == MagickFalse)
1321 for (j=0; j < current_layer; j++)
1322 layer_info[j].image=DestroyImage(layer_info[j].image);
1323 layer_info=(XCFLayerInfo *) RelinquishMagickMemory(layer_info);
1324 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1326 /* restore the saved position so we'll be ready to
1327 * read the next offset.
1329 offset=SeekBlob(image, saved_pos, SEEK_SET);
1332 if (number_layers == 1)
1335 Composite the layer data onto the main image, dispose the layer.
1337 (void) CompositeImage(image,layer_info[0].image,OverCompositeOp,
1338 MagickTrue,layer_info[0].offset_x,layer_info[0].offset_y,exception);
1339 layer_info[0].image =DestroyImage( layer_info[0].image);
1345 /* NOTE: XCF layers are REVERSED from composite order! */
1347 for (j=number_layers-1; j>=0; j--) {
1348 /* BOGUS: need to consider layer blending modes!! */
1350 if ( layer_info[j].visible ) { /* only visible ones, please! */
1351 CompositeImage(image, OverCompositeOp, layer_info[j].image,
1352 layer_info[j].offset_x, layer_info[j].offset_y );
1353 layer_info[j].image =DestroyImage( layer_info[j].image );
1355 /* If we do this, we'll get REAL gray images! */
1356 if ( image_type == GIMP_GRAY ) {
1358 GetQuantizeInfo(&qi);
1359 qi.colorspace = GRAYColorspace;
1360 QuantizeImage( &qi, layer_info[j].image );
1367 /* NOTE: XCF layers are REVERSED from composite order! */
1370 /* first we copy the last layer on top of the main image */
1371 (void) CompositeImage(image,layer_info[number_layers-1].image,
1372 CopyCompositeOp,MagickTrue,layer_info[number_layers-1].offset_x,
1373 layer_info[number_layers-1].offset_y,exception);
1374 layer_info[number_layers-1].image=DestroyImage(
1375 layer_info[number_layers-1].image);
1377 /* now reverse the order of the layers as they are put
1380 for (j=(ssize_t) number_layers-2; j >= 0; j--)
1381 AppendImageToList(&image,layer_info[j].image);
1386 layer_info=(XCFLayerInfo *) RelinquishMagickMemory(layer_info);
1388 #if 0 /* BOGUS: do we need the channels?? */
1391 /* read in the offset of the next channel */
1392 info->cp += xcf_read_int32 (info->fp, &offset, 1);
1394 /* if the offset is 0 then we are at the end
1395 * of the channel list.
1400 /* save the current position as it is where the
1401 * next channel offset is stored.
1403 saved_pos = info->cp;
1405 /* seek to the channel offset */
1406 xcf_seek_pos (info, offset);
1408 /* read in the layer */
1409 channel = xcf_load_channel (info, gimage);
1413 num_successful_elements++;
1415 /* add the channel to the image if its not the selection */
1416 if (channel != gimage->selection_mask)
1417 gimp_image_add_channel (gimage, channel, -1);
1419 /* restore the saved position so we'll be ready to
1420 * read the next offset.
1422 xcf_seek_pos (info, saved_pos);
1427 (void) CloseBlob(image);
1428 if (image_type == GIMP_GRAY)
1429 image->type=GrayscaleType;
1430 return(GetFirstImageInList(image));
1434 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1438 % R e g i s t e r X C F I m a g e %
1442 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1444 % RegisterXCFImage() adds attributes for the XCF image format to
1445 % the list of supported formats. The attributes include the image format
1446 % tag, a method to read and/or write the format, whether the format
1447 % supports the saving of more than one frame to the same file or blob,
1448 % whether the format supports native in-memory I/O, and a brief
1449 % description of the format.
1451 % The format of the RegisterXCFImage method is:
1453 % size_t RegisterXCFImage(void)
1456 ModuleExport size_t RegisterXCFImage(void)
1461 entry=SetMagickInfo("XCF");
1462 entry->decoder=(DecodeImageHandler *) ReadXCFImage;
1463 entry->magick=(IsImageFormatHandler *) IsXCF;
1464 entry->description=ConstantString("GIMP image");
1465 entry->module=ConstantString("XCF");
1466 entry->seekable_stream=MagickTrue;
1467 (void) RegisterMagickInfo(entry);
1468 return(MagickImageCoderSignature);
1472 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1476 % U n r e g i s t e r X C F I m a g e %
1480 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1482 % UnregisterXCFImage() removes format registrations made by the
1483 % XCF module from the list of supported formats.
1485 % The format of the UnregisterXCFImage method is:
1487 % UnregisterXCFImage(void)
1490 ModuleExport void UnregisterXCFImage(void)
1492 (void) UnregisterMagickInfo("XCF");