2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read GIMP XCF Image Format %
20 % Copyright 1999-2011 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=QueueAuthenticPixels(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 SetPixelRed(tile_image,ScaleCharToQuantum(*graydata),q);
377 SetPixelGreen(tile_image,GetPixelRed(image,q),q);
378 SetPixelBlue(tile_image,GetPixelRed(image,q),q);
379 SetPixelAlpha(tile_image,ScaleCharToQuantum((unsigned char)
380 inLayerInfo->alpha),q);
382 q+=GetPixelChannels(tile_image);
386 if (inDocInfo->image_type == GIMP_RGB)
388 for (x=0; x < (ssize_t) tile_image->columns; x++)
390 SetPixelRed(tile_image,ScaleCharToQuantum(xcfdata->red),q);
391 SetPixelGreen(tile_image,ScaleCharToQuantum(xcfdata->green),q);
392 SetPixelBlue(tile_image,ScaleCharToQuantum(xcfdata->blue),q);
393 SetPixelAlpha(tile_image,xcfdata->alpha == 0U ? OpaqueAlpha :
394 ScaleCharToQuantum((unsigned char) inLayerInfo->alpha),q);
396 q+=GetPixelChannels(tile_image);
399 if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
402 xcfodata=(XCFPixelInfo *) RelinquishMagickMemory(xcfodata);
406 static MagickBooleanType load_tile_rle(Image *image,Image *tile_image,
407 XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
408 ExceptionInfo *exception)
432 bytes_per_pixel=(ssize_t) inDocInfo->bytes_per_pixel;
433 xcfdata=(unsigned char *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
434 if (xcfdata == (unsigned char *) NULL)
435 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
438 count=ReadBlob(image, (size_t) data_length, xcfdata);
439 xcfdatalimit = xcfodata+count-1;
440 exception=(exception);
441 for (i=0; i < (ssize_t) bytes_per_pixel; i++)
443 q=GetAuthenticPixels(tile_image,0,0,tile_image->columns,tile_image->rows,
445 size=(MagickOffsetType) tile_image->rows*tile_image->columns;
448 if (xcfdata > xcfdatalimit)
451 length=(size_t) pixel;
454 length=255-(length-1);
457 if (xcfdata >= xcfdatalimit)
459 length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
465 if (&xcfdata[length-1] > xcfdatalimit)
474 SetPixelRed(tile_image,ScaleCharToQuantum(data),q);
475 if (inDocInfo->image_type == GIMP_GRAY)
477 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
478 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
479 SetPixelAlpha(tile_image,ScaleCharToQuantum(
480 (unsigned char) inLayerInfo->alpha),q);
484 SetPixelGreen(tile_image,GetPixelRed(image,q),q);
485 SetPixelBlue(tile_image,GetPixelRed(image,q),q);
486 SetPixelAlpha(tile_image,ScaleCharToQuantum(
487 (unsigned char) inLayerInfo->alpha),q);
493 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
498 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
503 SetPixelAlpha(tile_image,data == 0 ? OpaqueAlpha :
504 ScaleCharToQuantum((unsigned char) inLayerInfo->alpha),q);
508 q+=GetPixelChannels(tile_image);
516 if (xcfdata >= xcfdatalimit)
518 length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
524 if (xcfdata > xcfdatalimit)
527 for (j= 0; j < (ssize_t) length; j++)
534 SetPixelRed(tile_image,ScaleCharToQuantum(data),q);
535 if (inDocInfo->image_type == GIMP_GRAY)
537 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
538 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
539 SetPixelAlpha(tile_image,ScaleCharToQuantum(
540 (unsigned char) inLayerInfo->alpha),q);
544 SetPixelGreen(tile_image,GetPixelRed(image,q),q);
545 SetPixelBlue(tile_image,GetPixelRed(image,q),q);
546 SetPixelAlpha(tile_image,ScaleCharToQuantum(
547 (unsigned char) inLayerInfo->alpha),q);
553 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
558 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
563 SetPixelAlpha(tile_image,data == 0 ? OpaqueAlpha :
564 ScaleCharToQuantum((unsigned char) inLayerInfo->alpha),q);
568 q+=GetPixelChannels(tile_image);
572 if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
575 xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
579 if (xcfodata != (unsigned char *) NULL)
580 xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
584 static MagickBooleanType load_level(Image *image,XCFDocInfo *inDocInfo,
585 XCFLayerInfo *inLayerInfo)
617 /* start reading the data */
618 exception=inDocInfo->exception;
619 width=ReadBlobMSBLong(image);
620 height=ReadBlobMSBLong(image);
622 /* read in the first tile offset.
623 * if it is '0', then this tile level is empty
624 * and we can simply return.
626 offset=(MagickOffsetType) ReadBlobMSBLong(image);
629 /* Initialise the reference for the in-memory tile-compression
631 ntile_rows=(height+TILE_HEIGHT-1)/TILE_HEIGHT;
632 ntile_cols=(width+TILE_WIDTH-1)/TILE_WIDTH;
633 ntiles=ntile_rows*ntile_cols;
634 for (i = 0; i < (ssize_t) ntiles; i++)
638 ThrowBinaryException(CorruptImageError,"NotEnoughTiles",image->filename);
639 /* save the current position as it is where the
640 * next tile offset is stored.
642 saved_pos=TellBlob(image);
643 /* read in the offset of the next tile so we can calculate the amount
644 of data needed for this tile*/
645 offset2=(MagickOffsetType)ReadBlobMSBLong(image);
646 /* if the offset is 0 then we need to read in the maximum possible
647 allowing for negative compression */
649 offset2=(MagickOffsetType) (offset + TILE_WIDTH * TILE_WIDTH * 4* 1.5);
650 /* seek to the tile offset */
651 offset=SeekBlob(image, offset, SEEK_SET);
653 /* allocate the image for the tile
654 NOTE: the last tile in a row or column may not be a full tile!
656 tile_image_width=(size_t) (destLeft == (int) ntile_cols-1 ?
657 (int) width % TILE_WIDTH : TILE_WIDTH);
658 if (tile_image_width == 0) tile_image_width=TILE_WIDTH;
659 tile_image_height = (size_t) (destTop == (int) ntile_rows-1 ?
660 (int) height % TILE_HEIGHT : TILE_HEIGHT);
661 if (tile_image_height == 0) 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,CopyCompositeOp,tile_image,
687 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)
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) == 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(Image* image,XCFDocInfo* inDocInfo,
764 XCFLayerInfo *outLayer, ExceptionInfo *exception )
776 /* clear the block! */
777 (void) ResetMagickMemory( outLayer, 0, sizeof( XCFLayerInfo ) );
778 /* read in the layer width, height, type and name */
779 outLayer->width = ReadBlobMSBLong(image);
780 outLayer->height = ReadBlobMSBLong(image);
781 outLayer->type = ReadBlobMSBLong(image);
782 (void) ReadBlobStringWithLongSize(image, outLayer->name,
783 sizeof(outLayer->name),exception);
784 /* allocate the image for this layer */
785 outLayer->image=CloneImage(image,outLayer->width, outLayer->height,MagickTrue,
787 if (outLayer->image == (Image *) NULL)
789 /* read the layer properties! */
791 while ( (foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse) ) {
792 PropType prop_type = (PropType) ReadBlobMSBLong(image);
793 size_t prop_size = ReadBlobMSBLong(image);
799 case PROP_ACTIVE_LAYER:
800 outLayer->active = 1;
802 case PROP_FLOATING_SELECTION:
803 outLayer->floating_offset = ReadBlobMSBLong(image);
806 outLayer->alpha = ReadBlobMSBLong(image);
809 outLayer->visible = ReadBlobMSBLong(image);
812 outLayer->linked = ReadBlobMSBLong(image);
814 case PROP_PRESERVE_TRANSPARENCY:
815 outLayer->preserve_trans = ReadBlobMSBLong(image);
817 case PROP_APPLY_MASK:
818 outLayer->apply_mask = ReadBlobMSBLong(image);
821 outLayer->edit_mask = ReadBlobMSBLong(image);
824 outLayer->show_mask = ReadBlobMSBLong(image);
827 outLayer->offset_x = (int) ReadBlobMSBLong(image);
828 outLayer->offset_y = (int) ReadBlobMSBLong(image);
831 outLayer->mode = ReadBlobMSBLong(image);
834 outLayer->preserve_trans = ReadBlobMSBLong(image);
838 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
839 ThrowFileException(exception,CorruptImageError,
840 "UnexpectedEndOfFile",image->filename);
843 ssize_t base = info->cp;
845 while (info->cp - base < prop_size)
847 p = xcf_load_parasite(info);
848 gimp_drawable_parasite_attach(GIMP_DRAWABLE(layer), p);
849 gimp_parasite_free(p);
851 if (info->cp - base != prop_size)
852 g_message ("Error detected while loading a layer's parasites");
857 /* g_message ("unexpected/unknown layer property: %d (skipping)",
864 /* read over it... */
865 while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
867 amount = (ssize_t) MagickMin(16, prop_size);
868 amount = ReadBlob(image, (size_t) amount, (unsigned char *) &buf);
870 ThrowBinaryException(CorruptImageError,"CorruptImage",
872 prop_size -= (size_t) MagickMin(16, (size_t) amount);
879 if (foundPropEnd == MagickFalse)
881 /* clear the image based on the layer opacity */
882 outLayer->image->background_color.alpha=
883 ScaleCharToQuantum((unsigned char) (255-outLayer->alpha));
884 (void) SetImageBackgroundColor(outLayer->image,exception);
886 /* set the compositing mode */
887 outLayer->image->compose = GIMPBlendModeToCompositeOperator( outLayer->mode );
888 if ( outLayer->visible == MagickFalse )
890 /* BOGUS: should really be separate member var! */
891 outLayer->image->compose = NoCompositeOp;
894 /* read the hierarchy and layer mask offsets */
895 hierarchy_offset = ReadBlobMSBLong(image);
896 layer_mask_offset = ReadBlobMSBLong(image);
898 /* read in the hierarchy */
899 offset=SeekBlob(image, (MagickOffsetType) hierarchy_offset, SEEK_SET);
901 (void) ThrowMagickException(exception,GetMagickModule(),
902 CorruptImageError,"InvalidImageHeader","`%s'",image->filename);
903 if (load_hierarchy (image, inDocInfo, outLayer) == 0)
906 /* read in the layer mask */
907 if (layer_mask_offset != 0)
909 offset=SeekBlob(image, (MagickOffsetType) layer_mask_offset, SEEK_SET);
911 #if 0 /* BOGUS: support layer masks! */
912 layer_mask = xcf_load_layer_mask (info, gimage);
916 /* set the offsets of the layer_mask */
917 GIMP_DRAWABLE (layer_mask)->offset_x = GIMP_DRAWABLE (layer)->offset_x;
918 GIMP_DRAWABLE (layer_mask)->offset_y = GIMP_DRAWABLE (layer)->offset_y;
920 gimp_layer_add_mask (layer, layer_mask, MagickFalse);
922 layer->mask->apply_mask = apply_mask;
923 layer->mask->edit_mask = edit_mask;
924 layer->mask->show_mask = show_mask;
928 /* attach the floating selection... */
929 #if 0 /* BOGUS: we may need to read this, even if we don't support it! */
930 if (add_floating_sel)
932 GimpLayer *floating_sel;
934 floating_sel = info->floating_sel;
935 floating_sel_attach (floating_sel, GIMP_DRAWABLE (layer));
943 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
947 % R e a d X C F I m a g e %
951 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
953 % ReadXCFImage() reads a GIMP (GNU Image Manipulation Program) image
954 % file and returns it. It allocates the memory necessary for the new Image
955 % structure and returns a pointer to the new image.
957 % The format of the ReadXCFImage method is:
959 % image=ReadXCFImage(image_info)
961 % A description of each parameter follows:
963 % o image_info: the image info.
965 % o exception: return any errors or warnings in this structure.
969 static Image *ReadXCFImage(const ImageInfo *image_info,ExceptionInfo *exception)
1002 assert(image_info != (const ImageInfo *) NULL);
1003 assert(image_info->signature == MagickSignature);
1004 if (image_info->debug != MagickFalse)
1005 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
1006 image_info->filename);
1007 assert(exception != (ExceptionInfo *) NULL);
1008 assert(exception->signature == MagickSignature);
1009 image=AcquireImage(image_info,exception);
1010 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
1011 if (status == MagickFalse)
1013 image=DestroyImageList(image);
1014 return((Image *) NULL);
1016 count=ReadBlob(image,14,(unsigned char *) magick);
1018 (LocaleNCompare((char *) magick,"gimp xcf",8) != 0))
1019 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1020 (void) ResetMagickMemory(&doc_info,0,sizeof(XCFDocInfo));
1021 doc_info.exception=exception;
1022 doc_info.width=ReadBlobMSBLong(image);
1023 doc_info.height=ReadBlobMSBLong(image);
1024 if ((doc_info.width > 262144) || (doc_info.height > 262144))
1025 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1026 doc_info.image_type=ReadBlobMSBLong(image);
1028 Initialize image attributes.
1030 image->columns=doc_info.width;
1031 image->rows=doc_info.height;
1032 image_type=doc_info.image_type;
1033 doc_info.file_size=GetBlobSize(image);
1034 image->compression=NoCompression;
1036 if (image_type == GIMP_RGB)
1037 image->colorspace=RGBColorspace;
1039 if (image_type == GIMP_GRAY)
1040 image->colorspace=GRAYColorspace;
1042 if (image_type == GIMP_INDEXED)
1043 ThrowReaderException(CoderError,"ColormapTypeNotSupported");
1044 (void) SetImageBackgroundColor(image,exception);
1045 image->matte=MagickTrue;
1049 while ((foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse))
1051 PropType prop_type = (PropType) ReadBlobMSBLong(image);
1052 size_t prop_size = ReadBlobMSBLong(image);
1061 /* Cannot rely on prop_size here--the value is set incorrectly
1062 by some Gimp versions.
1064 size_t num_colours = ReadBlobMSBLong(image);
1065 if (DiscardBlobBytes(image,3*num_colours) == MagickFalse)
1066 ThrowFileException(exception,CorruptImageError,
1067 "UnexpectedEndOfFile",image->filename);
1069 if (info->file_version == 0)
1073 g_message (_("XCF warning: version 0 of XCF file format\n"
1074 "did not save indexed colormaps correctly.\n"
1075 "Substituting grayscale map."));
1077 xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
1078 gimage->cmap = g_new (guchar, gimage->num_cols*3);
1079 xcf_seek_pos (info, info->cp + gimage->num_cols);
1080 for (i = 0; i<gimage->num_cols; i++)
1082 gimage->cmap[i*3+0] = i;
1083 gimage->cmap[i*3+1] = i;
1084 gimage->cmap[i*3+2] = i;
1090 xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
1091 gimage->cmap = g_new (guchar, gimage->num_cols*3);
1093 xcf_read_int8 (info->fp,
1094 (guint8*) gimage->cmap, gimage->num_cols*3);
1099 case PROP_COMPRESSION:
1101 doc_info.compression = ReadBlobByte(image);
1102 if ((doc_info.compression != COMPRESS_NONE) &&
1103 (doc_info.compression != COMPRESS_RLE) &&
1104 (doc_info.compression != COMPRESS_ZLIB) &&
1105 (doc_info.compression != COMPRESS_FRACTAL))
1106 ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
1112 /* just skip it - we don't care about guides */
1113 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1114 ThrowFileException(exception,CorruptImageError,
1115 "UnexpectedEndOfFile",image->filename);
1119 case PROP_RESOLUTION:
1121 /* float xres = (float) */ (void) ReadBlobMSBLong(image);
1122 /* float yres = (float) */ (void) ReadBlobMSBLong(image);
1125 if (xres < GIMP_MIN_RESOLUTION || xres > GIMP_MAX_RESOLUTION ||
1126 yres < GIMP_MIN_RESOLUTION || yres > GIMP_MAX_RESOLUTION)
1128 g_message ("Warning, resolution out of range in XCF file");
1129 xres = gimage->gimp->config->default_xresolution;
1130 yres = gimage->gimp->config->default_yresolution;
1135 /* BOGUS: we don't write these yet because we aren't
1136 reading them properly yet :(
1137 image->resolution.x = xres;
1138 image->resolution.y = yres;
1145 /* we need to read it, even if we ignore it */
1146 /*size_t tattoo_state = */ (void) ReadBlobMSBLong(image);
1150 case PROP_PARASITES:
1152 /* BOGUS: we may need these for IPTC stuff */
1153 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1154 ThrowFileException(exception,CorruptImageError,
1155 "UnexpectedEndOfFile",image->filename);
1157 gssize_t base = info->cp;
1160 while (info->cp - base < prop_size)
1162 p = xcf_load_parasite (info);
1163 gimp_image_parasite_attach (gimage, p);
1164 gimp_parasite_free (p);
1166 if (info->cp - base != prop_size)
1167 g_message ("Error detected while loading an image's parasites");
1174 /* BOGUS: ignore for now... */
1175 /*size_t unit = */ (void) ReadBlobMSBLong(image);
1181 /* BOGUS: just skip it for now */
1182 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1183 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
1187 PathList *paths = xcf_load_bzpaths (gimage, info);
1188 gimp_image_set_paths (gimage, paths);
1193 case PROP_USER_UNIT:
1195 char unit_string[1000];
1196 /*BOGUS: ignored for now */
1197 /*float factor = (float) */ (void) ReadBlobMSBLong(image);
1198 /* size_t digits = */ (void) ReadBlobMSBLong(image);
1200 (void) ReadBlobStringWithLongSize(image, unit_string,
1201 sizeof(unit_string),exception);
1210 /* read over it... */
1211 while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
1213 amount=(ssize_t) MagickMin(16, prop_size);
1214 amount=(ssize_t) ReadBlob(image,(size_t) amount,(unsigned char *) &buf);
1216 ThrowReaderException(CorruptImageError,"CorruptImage");
1217 prop_size -= (size_t) MagickMin(16,(size_t) amount);
1223 if (foundPropEnd == MagickFalse)
1224 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1226 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
1228 ; /* do nothing, were just pinging! */
1234 foundAllLayers = MagickFalse,
1238 oldPos=TellBlob(image);
1248 ssize_t offset = (int) ReadBlobMSBLong(image);
1250 foundAllLayers=MagickTrue;
1253 if (EOFBlob(image) != MagickFalse)
1255 ThrowFileException(exception,CorruptImageError,
1256 "UnexpectedEndOfFile",image->filename);
1259 } while (foundAllLayers == MagickFalse);
1260 offset=SeekBlob(image,oldPos,SEEK_SET); /* restore the position! */
1262 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1263 /* allocate our array of layer info blocks */
1264 length=(size_t) number_layers;
1265 layer_info=(XCFLayerInfo *) AcquireQuantumMemory(length,
1266 sizeof(*layer_info));
1267 if (layer_info == (XCFLayerInfo *) NULL)
1268 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1269 (void) ResetMagickMemory(layer_info,0,number_layers*sizeof(XCFLayerInfo));
1279 /* read in the offset of the next layer */
1280 offset=(MagickOffsetType) ReadBlobMSBLong(image);
1281 /* if the offset is 0 then we are at the end
1282 * of the layer list.
1286 /* save the current position as it is where the
1287 * next layer offset is stored.
1289 saved_pos=TellBlob(image);
1290 /* seek to the layer offset */
1291 offset=SeekBlob(image,offset,SEEK_SET);
1292 /* read in the layer */
1293 layer_ok=ReadOneLayer(image,&doc_info,&layer_info[current_layer],
1295 if (layer_ok == MagickFalse)
1299 for (j=0; j < current_layer; j++)
1300 layer_info[j].image=DestroyImage(layer_info[j].image);
1301 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1303 /* restore the saved position so we'll be ready to
1304 * read the next offset.
1306 offset=SeekBlob(image, saved_pos, SEEK_SET);
1309 if (number_layers == 1)
1312 Composite the layer data onto the main image, dispose the layer.
1314 (void) CompositeImage(image,OverCompositeOp,layer_info[0].image,
1315 layer_info[0].offset_x,layer_info[0].offset_y,exception);
1316 layer_info[0].image =DestroyImage( layer_info[0].image);
1322 /* NOTE: XCF layers are REVERSED from composite order! */
1324 for (j=number_layers-1; j>=0; j--) {
1325 /* BOGUS: need to consider layer blending modes!! */
1327 if ( layer_info[j].visible ) { /* only visible ones, please! */
1328 CompositeImage(image, OverCompositeOp, layer_info[j].image,
1329 layer_info[j].offset_x, layer_info[j].offset_y );
1330 layer_info[j].image =DestroyImage( layer_info[j].image );
1332 /* Bob says that if we do this, we'll get REAL gray images! */
1333 if ( image_type == GIMP_GRAY ) {
1335 GetQuantizeInfo(&qi);
1336 qi.colorspace = GRAYColorspace;
1337 QuantizeImage( &qi, layer_info[j].image );
1344 /* NOTE: XCF layers are REVERSED from composite order! */
1347 /* first we copy the last layer on top of the main image */
1348 (void) CompositeImage(image,CopyCompositeOp,
1349 layer_info[number_layers-1].image,
1350 layer_info[number_layers-1].offset_x,
1351 layer_info[number_layers-1].offset_y,exception);
1352 layer_info[number_layers-1].image=DestroyImage(
1353 layer_info[number_layers-1].image);
1355 /* now reverse the order of the layers as they are put
1359 image->next=layer_info[j].image;
1360 layer_info[j].image->previous=image;
1361 layer_info[j].image->page.x=layer_info[j].offset_x;
1362 layer_info[j].image->page.y=layer_info[j].offset_y;
1363 layer_info[j].image->page.width=layer_info[j].width;
1364 layer_info[j].image->page.height=layer_info[j].height;
1365 for (j=number_layers-3; j>=0; j--)
1368 layer_info[j].image->next=layer_info[j-1].image;
1369 if (j < (number_layers-1))
1370 layer_info[j].image->previous=layer_info[j+1].image;
1371 layer_info[j].image->page.x=layer_info[j].offset_x;
1372 layer_info[j].image->page.y=layer_info[j].offset_y;
1373 layer_info[j].image->page.width=layer_info[j].width;
1374 layer_info[j].image->page.height=layer_info[j].height;
1380 layer_info=(XCFLayerInfo *) RelinquishMagickMemory(layer_info);
1382 #if 0 /* BOGUS: do we need the channels?? */
1385 /* read in the offset of the next channel */
1386 info->cp += xcf_read_int32 (info->fp, &offset, 1);
1388 /* if the offset is 0 then we are at the end
1389 * of the channel list.
1394 /* save the current position as it is where the
1395 * next channel offset is stored.
1397 saved_pos = info->cp;
1399 /* seek to the channel offset */
1400 xcf_seek_pos (info, offset);
1402 /* read in the layer */
1403 channel = xcf_load_channel (info, gimage);
1407 num_successful_elements++;
1409 /* add the channel to the image if its not the selection */
1410 if (channel != gimage->selection_mask)
1411 gimp_image_add_channel (gimage, channel, -1);
1413 /* restore the saved position so we'll be ready to
1414 * read the next offset.
1416 xcf_seek_pos (info, saved_pos);
1421 (void) CloseBlob(image);
1422 if (image_type == GIMP_GRAY)
1423 image->type=GrayscaleType;
1424 return(GetFirstImageInList(image));
1428 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1432 % R e g i s t e r X C F I m a g e %
1436 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1438 % RegisterXCFImage() adds attributes for the XCF image format to
1439 % the list of supported formats. The attributes include the image format
1440 % tag, a method to read and/or write the format, whether the format
1441 % supports the saving of more than one frame to the same file or blob,
1442 % whether the format supports native in-memory I/O, and a brief
1443 % description of the format.
1445 % The format of the RegisterXCFImage method is:
1447 % size_t RegisterXCFImage(void)
1450 ModuleExport size_t RegisterXCFImage(void)
1455 entry=SetMagickInfo("XCF");
1456 entry->decoder=(DecodeImageHandler *) ReadXCFImage;
1457 entry->magick=(IsImageFormatHandler *) IsXCF;
1458 entry->description=ConstantString("GIMP image");
1459 entry->module=ConstantString("XCF");
1460 entry->seekable_stream=MagickTrue;
1461 (void) RegisterMagickInfo(entry);
1462 return(MagickImageCoderSignature);
1466 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1470 % U n r e g i s t e r X C F I m a g e %
1474 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1476 % UnregisterXCFImage() removes format registrations made by the
1477 % XCF module from the list of supported formats.
1479 % The format of the UnregisterXCFImage method is:
1481 % UnregisterXCFImage(void)
1484 ModuleExport void UnregisterXCFImage(void)
1486 (void) UnregisterMagickInfo("XCF");