2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read GIMP XCF Image Format %
20 % Copyright 1999-2010 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 "magick/studio.h"
43 #include "magick/blob.h"
44 #include "magick/blob-private.h"
45 #include "magick/cache.h"
46 #include "magick/color.h"
47 #include "magick/composite.h"
48 #include "magick/exception.h"
49 #include "magick/exception-private.h"
50 #include "magick/image.h"
51 #include "magick/image-private.h"
52 #include "magick/list.h"
53 #include "magick/magick.h"
54 #include "magick/memory_.h"
55 #include "magick/quantize.h"
56 #include "magick/quantum-private.h"
57 #include "magick/static.h"
58 #include "magick/string_.h"
59 #include "magick/module.h"
75 PROP_ACTIVE_LAYER = 2,
76 PROP_ACTIVE_CHANNEL = 3,
78 PROP_FLOATING_SELECTION = 5,
83 PROP_PRESERVE_TRANSPARENCY = 10,
87 PROP_SHOW_MASKED = 14,
90 PROP_COMPRESSION = 17,
104 COMPRESS_ZLIB = 2, /* unused */
105 COMPRESS_FRACTAL = 3 /* unused */
106 } XcfCompressionType;
159 #define TILE_WIDTH 64
160 #define TILE_HEIGHT 64
172 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
180 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
182 % IsXCF() returns MagickTrue if the image format type, identified by the
183 % magick string, is XCF (GIMP native format).
185 % The format of the IsXCF method is:
187 % MagickBooleanType IsXCF(const unsigned char *magick,const size_t length)
189 % A description of each parameter follows:
191 % o magick: compare image format pattern against these bytes.
193 % o length: Specifies the length of the magick string.
197 static MagickBooleanType IsXCF(const unsigned char *magick,const size_t length)
201 if (LocaleNCompare((char *) magick,"gimp xcf",8) == 0)
214 GIMP_DIFFERENCE_MODE,
217 GIMP_DARKEN_ONLY_MODE,
218 GIMP_LIGHTEN_ONLY_MODE,
220 GIMP_SATURATION_MODE,
227 } GimpLayerModeEffects;
230 Simple utility routine to convert between PSD blending modes and
231 ImageMagick compositing operators
233 static CompositeOperator GIMPBlendModeToCompositeOperator(
234 unsigned long blendMode)
238 case GIMP_NORMAL_MODE: return( OverCompositeOp );
239 case GIMP_DISSOLVE_MODE: return( DissolveCompositeOp );
240 case GIMP_MULTIPLY_MODE: return( MultiplyCompositeOp );
241 case GIMP_SCREEN_MODE: return( ScreenCompositeOp );
242 case GIMP_OVERLAY_MODE: return( OverlayCompositeOp );
243 case GIMP_DIFFERENCE_MODE: return( DifferenceCompositeOp );
244 case GIMP_ADDITION_MODE: return( AddCompositeOp );
245 case GIMP_SUBTRACT_MODE: return( SubtractCompositeOp );
246 case GIMP_DARKEN_ONLY_MODE: return( DarkenCompositeOp );
247 case GIMP_LIGHTEN_ONLY_MODE:return( LightenCompositeOp );
248 case GIMP_HUE_MODE: return( HueCompositeOp );
249 case GIMP_SATURATION_MODE: return( SaturateCompositeOp );
250 case GIMP_COLOR_MODE: return( ColorizeCompositeOp );
251 case GIMP_DODGE_MODE: return( ColorDodgeCompositeOp );
252 case GIMP_BURN_MODE: return( ColorBurnCompositeOp );
253 case GIMP_HARDLIGHT_MODE: return( HardLightCompositeOp );
254 case GIMP_DIVIDE_MODE: return( DivideCompositeOp );
255 /* these are the ones we don't support...yet */
256 case GIMP_BEHIND_MODE: return( OverCompositeOp );
257 case GIMP_VALUE_MODE: return( OverCompositeOp );
259 return(OverCompositeOp);
264 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
268 + 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 %
272 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
274 % ReadBlobStringWithLongSize reads characters from a blob or file
275 % starting with a long length byte and then characters to that length
277 % The format of the ReadBlobStringWithLongSize method is:
279 % char *ReadBlobStringWithLongSize(Image *image,char *string)
281 % A description of each parameter follows:
283 % o image: the image.
285 % o string: the address of a character buffer.
289 static inline size_t MagickMin(const size_t x,const size_t y)
296 static char *ReadBlobStringWithLongSize(Image *image,char *string,size_t max)
310 assert(image != (Image *) NULL);
311 assert(image->signature == MagickSignature);
313 if (image->debug != MagickFalse)
314 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
315 length=ReadBlobMSBLong(image);
316 for (i=0; i < (long) MagickMin(length,max-1); i++)
318 c=ReadBlobByte(image);
320 return((char *) NULL);
324 offset=SeekBlob(image,(MagickOffsetType) (length-i),SEEK_CUR);
326 (void) ThrowMagickException(&image->exception,GetMagickModule(),
327 CorruptImageError,"ImproperImageHeader","`%s'",image->filename);
331 static MagickBooleanType load_tile(Image *image,Image *tile_image,
332 XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length)
356 xcfdata=(XCFPixelPacket *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
357 if (xcfdata == (XCFPixelPacket *) NULL)
358 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
361 graydata=(unsigned char *) xcfdata; /* used by gray and indexed */
362 count=ReadBlob(image,data_length,(unsigned char *) xcfdata);
363 if (count != (ssize_t) data_length)
364 ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
366 exception=(&image->exception);
367 for (y=0; y < (long) tile_image->rows; y++)
369 q=QueueAuthenticPixels(tile_image,0,y,tile_image->columns,1,exception);
370 if (q == (PixelPacket *) NULL)
372 if (inDocInfo->image_type == GIMP_GRAY)
374 for (x=0; x < (long) tile_image->columns; x++)
376 q->red=ScaleCharToQuantum(*graydata);
379 q->opacity=ScaleCharToQuantum(255-inLayerInfo->opacity);
385 if (inDocInfo->image_type == GIMP_RGB)
387 for (x=0; x < (long) tile_image->columns; x++)
389 q->red=ScaleCharToQuantum(xcfdata->red);
390 q->green=ScaleCharToQuantum(xcfdata->green);
391 q->blue=ScaleCharToQuantum(xcfdata->blue);
392 q->opacity=(Quantum) (xcfdata->opacity == 0U ? TransparentOpacity :
393 ScaleCharToQuantum(255-inLayerInfo->opacity));
398 if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
401 xcfodata=(XCFPixelPacket *) RelinquishMagickMemory(xcfodata);
405 static MagickBooleanType load_tile_rle(Image *image,Image *tile_image,
406 XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length)
435 bytes_per_pixel=(ssize_t) inDocInfo->bytes_per_pixel;
436 xcfdata=(unsigned char *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
437 if (xcfdata == (unsigned char *) NULL)
438 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
441 count=ReadBlob(image, (size_t) data_length, xcfdata);
442 xcfdatalimit = xcfodata+count-1;
443 exception=(&image->exception);
444 for (i=0; i < (long) bytes_per_pixel; i++)
446 q=GetAuthenticPixels(tile_image,0,0,tile_image->columns,tile_image->rows,exception);
447 size=(MagickOffsetType) tile_image->rows*tile_image->columns;
450 if (xcfdata > xcfdatalimit)
453 length=(size_t) pixel;
456 length=255-(length-1);
459 if (xcfdata >= xcfdatalimit)
461 length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
467 if (&xcfdata[length-1] > xcfdatalimit)
476 q->red=ScaleCharToQuantum(data);
477 if (inDocInfo->image_type == GIMP_GRAY)
479 q->green=ScaleCharToQuantum(data);
480 q->blue=ScaleCharToQuantum(data);
481 q->opacity=ScaleCharToQuantum(255-inLayerInfo->opacity);
487 q->opacity=ScaleCharToQuantum(255-inLayerInfo->opacity);
493 q->green=ScaleCharToQuantum(data);
498 q->blue=ScaleCharToQuantum(data);
503 q->opacity=(Quantum) (data == 0 ? TransparentOpacity :
504 ScaleCharToQuantum(255-inLayerInfo->opacity));
516 if (xcfdata >= xcfdatalimit)
518 length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
524 if (xcfdata > xcfdatalimit)
527 for (j= 0; j < (long) length; j++)
534 q->red=ScaleCharToQuantum(data);
535 if (inDocInfo->image_type == GIMP_GRAY)
537 q->green=ScaleCharToQuantum(data);
538 q->blue=ScaleCharToQuantum(data);
539 q->opacity=ScaleCharToQuantum(255-inLayerInfo->opacity);
545 q->opacity=ScaleCharToQuantum(255-inLayerInfo->opacity);
551 q->green=ScaleCharToQuantum(data);
556 q->blue=ScaleCharToQuantum(data);
561 q->opacity=(Quantum) (data == 0 ? TransparentOpacity :
562 ScaleCharToQuantum(255-inLayerInfo->opacity));
570 if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
573 xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
577 if (xcfodata != (unsigned char *) NULL)
578 xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
582 static MagickBooleanType load_level(Image *image,XCFDocInfo *inDocInfo,
583 XCFLayerInfo *inLayerInfo)
615 /* start reading the data */
616 exception=inDocInfo->exception;
617 width=ReadBlobMSBLong(image);
618 height=ReadBlobMSBLong(image);
620 /* read in the first tile offset.
621 * if it is '0', then this tile level is empty
622 * and we can simply return.
624 offset=(MagickOffsetType) ReadBlobMSBLong(image);
627 /* Initialise the reference for the in-memory tile-compression
629 ntile_rows=(height+TILE_HEIGHT-1)/TILE_HEIGHT;
630 ntile_cols=(width+TILE_WIDTH-1)/TILE_WIDTH;
631 ntiles=ntile_rows*ntile_cols;
632 for (i = 0; i < (long) ntiles; i++)
636 ThrowBinaryException(CorruptImageError,"NotEnoughTiles",image->filename);
637 /* save the current position as it is where the
638 * next tile offset is stored.
640 saved_pos=TellBlob(image);
641 /* read in the offset of the next tile so we can calculate the amount
642 of data needed for this tile*/
643 offset2=(MagickOffsetType)ReadBlobMSBLong(image);
644 /* if the offset is 0 then we need to read in the maximum possible
645 allowing for negative compression */
647 offset2=(MagickOffsetType) (offset + TILE_WIDTH * TILE_WIDTH * 4* 1.5);
648 /* seek to the tile offset */
649 offset=SeekBlob(image, offset, SEEK_SET);
651 /* allocate the image for the tile
652 NOTE: the last tile in a row or column may not be a full tile!
654 tile_image_width=(unsigned long) (destLeft == (int) ntile_cols-1 ?
655 (int) width % TILE_WIDTH : TILE_WIDTH);
656 if (tile_image_width == 0) tile_image_width=TILE_WIDTH;
657 tile_image_height = (unsigned long) (destTop == (int) ntile_rows-1 ?
658 (int) height % TILE_HEIGHT : TILE_HEIGHT);
659 if (tile_image_height == 0) tile_image_height=TILE_HEIGHT;
660 tile_image=CloneImage(inLayerInfo->image,tile_image_width,
661 tile_image_height,MagickTrue,exception);
663 /* read in the tile */
664 switch (inDocInfo->compression)
667 if (load_tile(image,tile_image,inDocInfo,inLayerInfo,(size_t) (offset2-offset)) == 0)
671 if (load_tile_rle (image,tile_image,inDocInfo,inLayerInfo,
672 (int) (offset2-offset)) == 0)
676 ThrowBinaryException(CoderError,"ZipCompressNotSupported",
678 case COMPRESS_FRACTAL:
679 ThrowBinaryException(CoderError,"FractalCompressNotSupported",
683 /* composite the tile onto the layer's image, and then destroy it */
684 (void) CompositeImage(inLayerInfo->image,CopyCompositeOp,tile_image,
685 destLeft * TILE_WIDTH,destTop*TILE_HEIGHT);
686 tile_image=DestroyImage(tile_image);
688 /* adjust tile position */
690 if (destLeft >= (int) ntile_cols)
695 if (status != MagickFalse)
697 /* restore the saved position so we'll be ready to
698 * read the next offset.
700 offset=SeekBlob(image, saved_pos, SEEK_SET);
701 /* read in the offset of the next tile */
702 offset=(MagickOffsetType) ReadBlobMSBLong(image);
705 ThrowBinaryException(CorruptImageError,"CorruptImage",image->filename)
709 static MagickBooleanType load_hierarchy(Image *image,XCFDocInfo *inDocInfo,
710 XCFLayerInfo *inLayer)
722 width=ReadBlobMSBLong(image);
723 height=ReadBlobMSBLong(image);
724 bytes_per_pixel=inDocInfo->bytes_per_pixel=ReadBlobMSBLong(image);
726 /* load in the levels...we make sure that the number of levels
727 * calculated when the TileManager was created is the same
728 * as the number of levels found in the file.
730 offset=(MagickOffsetType) ReadBlobMSBLong(image); /* top level */
732 /* discard offsets for layers below first, if any.
736 junk=(MagickOffsetType) ReadBlobMSBLong(image);
740 /* save the current position as it is where the
741 * next level offset is stored.
743 saved_pos=TellBlob(image);
745 /* seek to the level offset */
746 offset=SeekBlob(image, offset, SEEK_SET);
748 /* read in the level */
749 if (load_level (image, inDocInfo, inLayer) == 0)
751 /* restore the saved position so we'll be ready to
752 * read the next offset.
754 offset=SeekBlob(image, saved_pos, SEEK_SET);
758 static MagickBooleanType ReadOneLayer(Image* image,XCFDocInfo* inDocInfo,
759 XCFLayerInfo *outLayer )
774 /* clear the block! */
775 (void) ResetMagickMemory( outLayer, 0, sizeof( XCFLayerInfo ) );
776 /* read in the layer width, height, type and name */
777 outLayer->width = ReadBlobMSBLong(image);
778 outLayer->height = ReadBlobMSBLong(image);
779 outLayer->type = ReadBlobMSBLong(image);
780 (void) ReadBlobStringWithLongSize(image, outLayer->name,
781 sizeof(outLayer->name));
782 /* allocate the image for this layer */
783 outLayer->image=CloneImage(image,outLayer->width, outLayer->height,MagickTrue,
785 if (outLayer->image == (Image *) NULL)
787 /* read the layer properties! */
789 while ( (foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse) ) {
790 PropType prop_type = (PropType) ReadBlobMSBLong(image);
791 unsigned long prop_size = ReadBlobMSBLong(image);
797 case PROP_ACTIVE_LAYER:
798 outLayer->active = 1;
800 case PROP_FLOATING_SELECTION:
801 outLayer->floating_offset = ReadBlobMSBLong(image);
804 outLayer->opacity = ReadBlobMSBLong(image);
807 outLayer->visible = ReadBlobMSBLong(image);
810 outLayer->linked = ReadBlobMSBLong(image);
812 case PROP_PRESERVE_TRANSPARENCY:
813 outLayer->preserve_trans = ReadBlobMSBLong(image);
815 case PROP_APPLY_MASK:
816 outLayer->apply_mask = ReadBlobMSBLong(image);
819 outLayer->edit_mask = ReadBlobMSBLong(image);
822 outLayer->show_mask = ReadBlobMSBLong(image);
825 outLayer->offset_x = (long) ReadBlobMSBLong(image);
826 outLayer->offset_y = (long) ReadBlobMSBLong(image);
829 outLayer->mode = ReadBlobMSBLong(image);
832 outLayer->preserve_trans = ReadBlobMSBLong(image);
836 for (i=0; i < (long) prop_size; i++ )
837 (void) ReadBlobByte(image);
840 long base = info->cp;
842 while (info->cp - base < prop_size)
844 p = xcf_load_parasite(info);
845 gimp_drawable_parasite_attach(GIMP_DRAWABLE(layer), p);
846 gimp_parasite_free(p);
848 if (info->cp - base != prop_size)
849 g_message ("Error detected while loading a layer's parasites");
854 /* g_message ("unexpected/unknown layer property: %d (skipping)",
861 /* read over it... */
862 while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
864 amount = (ssize_t) MagickMin(16, prop_size);
865 amount = ReadBlob(image, (size_t) amount, (unsigned char *) &buf);
867 ThrowBinaryException(CorruptImageError,"CorruptImage",
869 prop_size -= (unsigned long) MagickMin(16, (size_t) amount);
876 if (foundPropEnd == MagickFalse)
878 /* clear the image based on the layer opacity */
879 outLayer->image->background_color.opacity=
880 ScaleCharToQuantum((unsigned char) (255-outLayer->opacity));
881 (void) SetImageBackgroundColor(outLayer->image);
883 /* set the compositing mode */
884 outLayer->image->compose = GIMPBlendModeToCompositeOperator( outLayer->mode );
885 if ( outLayer->visible == MagickFalse )
887 /* BOGUS: should really be separate member var! */
888 outLayer->image->compose = NoCompositeOp;
891 /* read the hierarchy and layer mask offsets */
892 hierarchy_offset = ReadBlobMSBLong(image);
893 layer_mask_offset = ReadBlobMSBLong(image);
895 /* read in the hierarchy */
896 offset=SeekBlob(image, (MagickOffsetType) hierarchy_offset, SEEK_SET);
898 (void) ThrowMagickException(&image->exception,GetMagickModule(),
899 CorruptImageError,"InvalidImageHeader","`%s'",image->filename);
900 if (load_hierarchy (image, inDocInfo, outLayer) == 0)
903 /* read in the layer mask */
904 if (layer_mask_offset != 0)
906 offset=SeekBlob(image, (MagickOffsetType) layer_mask_offset, SEEK_SET);
908 #if 0 /* BOGUS: support layer masks! */
909 layer_mask = xcf_load_layer_mask (info, gimage);
913 /* set the offsets of the layer_mask */
914 GIMP_DRAWABLE (layer_mask)->offset_x = GIMP_DRAWABLE (layer)->offset_x;
915 GIMP_DRAWABLE (layer_mask)->offset_y = GIMP_DRAWABLE (layer)->offset_y;
917 gimp_layer_add_mask (layer, layer_mask, MagickFalse);
919 layer->mask->apply_mask = apply_mask;
920 layer->mask->edit_mask = edit_mask;
921 layer->mask->show_mask = show_mask;
925 /* attach the floating selection... */
926 #if 0 /* BOGUS: we may need to read this, even if we don't support it! */
927 if (add_floating_sel)
929 GimpLayer *floating_sel;
931 floating_sel = info->floating_sel;
932 floating_sel_attach (floating_sel, GIMP_DRAWABLE (layer));
940 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
944 % R e a d X C F I m a g e %
948 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
950 % ReadXCFImage() reads a GIMP (GNU Image Manipulation Program) image
951 % file and returns it. It allocates the memory necessary for the new Image
952 % structure and returns a pointer to the new image.
954 % The format of the ReadXCFImage method is:
956 % image=ReadXCFImage(image_info)
958 % A description of each parameter follows:
960 % o image_info: the image info.
962 % o exception: return any errors or warnings in this structure.
966 static Image *ReadXCFImage(const ImageInfo *image_info,ExceptionInfo *exception)
1001 assert(image_info != (const ImageInfo *) NULL);
1002 assert(image_info->signature == MagickSignature);
1003 if (image_info->debug != MagickFalse)
1004 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
1005 image_info->filename);
1006 assert(exception != (ExceptionInfo *) NULL);
1007 assert(exception->signature == MagickSignature);
1008 image=AcquireImage(image_info);
1009 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
1010 if (status == MagickFalse)
1012 image=DestroyImageList(image);
1013 return((Image *) NULL);
1015 count=ReadBlob(image,14,(unsigned char *) magick);
1017 (LocaleNCompare((char *) magick,"gimp xcf",8) != 0))
1018 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1019 (void) ResetMagickMemory(&doc_info,0,sizeof(XCFDocInfo));
1020 doc_info.exception=exception;
1021 doc_info.width=ReadBlobMSBLong(image);
1022 doc_info.height=ReadBlobMSBLong(image);
1023 if ((doc_info.width > 262144) || (doc_info.height > 262144))
1024 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1025 doc_info.image_type=ReadBlobMSBLong(image);
1027 Initialize image attributes.
1029 image->columns=doc_info.width;
1030 image->rows=doc_info.height;
1031 image_type=doc_info.image_type;
1032 doc_info.file_size=GetBlobSize(image);
1033 image->compression=NoCompression;
1035 if (image_type == GIMP_RGB)
1036 image->colorspace=RGBColorspace;
1038 if (image_type == GIMP_GRAY)
1039 image->colorspace=GRAYColorspace;
1041 if (image_type == GIMP_INDEXED)
1042 ThrowReaderException(CoderError,"ColormapTypeNotSupported");
1043 (void) SetImageBackgroundColor(image);
1044 image->matte=MagickTrue;
1048 while ((foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse))
1050 PropType prop_type = (PropType) ReadBlobMSBLong(image);
1051 unsigned long prop_size = ReadBlobMSBLong(image);
1060 /* Cannot rely on prop_size here--the value is set incorrectly
1061 by some Gimp versions.
1063 unsigned long num_colours = ReadBlobMSBLong(image);
1064 for (i=0; i < (long) (3L*num_colours); i++ )
1065 (void) ReadBlobByte(image);
1067 if (info->file_version == 0)
1071 g_message (_("XCF warning: version 0 of XCF file format\n"
1072 "did not save indexed colormaps correctly.\n"
1073 "Substituting grayscale map."));
1075 xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
1076 gimage->cmap = g_new (guchar, gimage->num_cols*3);
1077 xcf_seek_pos (info, info->cp + gimage->num_cols);
1078 for (i = 0; i<gimage->num_cols; i++)
1080 gimage->cmap[i*3+0] = i;
1081 gimage->cmap[i*3+1] = i;
1082 gimage->cmap[i*3+2] = i;
1088 xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
1089 gimage->cmap = g_new (guchar, gimage->num_cols*3);
1091 xcf_read_int8 (info->fp,
1092 (guint8*) gimage->cmap, gimage->num_cols*3);
1097 case PROP_COMPRESSION:
1099 doc_info.compression = ReadBlobByte(image);
1100 if ((doc_info.compression != COMPRESS_NONE) &&
1101 (doc_info.compression != COMPRESS_RLE) &&
1102 (doc_info.compression != COMPRESS_ZLIB) &&
1103 (doc_info.compression != COMPRESS_FRACTAL))
1104 ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
1110 /* just skip it - we don't care about guides */
1111 for (i=0; i < (long) prop_size; i++ )
1112 if (ReadBlobByte(image) == EOF)
1113 ThrowFileException(exception,CorruptImageError,
1114 "UnexpectedEndOfFile",image->filename);
1118 case PROP_RESOLUTION:
1120 /* float xres = (float) */ (void) ReadBlobMSBLong(image);
1121 /* float yres = (float) */ (void) ReadBlobMSBLong(image);
1124 if (xres < GIMP_MIN_RESOLUTION || xres > GIMP_MAX_RESOLUTION ||
1125 yres < GIMP_MIN_RESOLUTION || yres > GIMP_MAX_RESOLUTION)
1127 g_message ("Warning, resolution out of range in XCF file");
1128 xres = gimage->gimp->config->default_xresolution;
1129 yres = gimage->gimp->config->default_yresolution;
1134 /* BOGUS: we don't write these yet because we aren't
1135 reading them properly yet :(
1136 image->x_resolution = xres;
1137 image->y_resolution = yres;
1144 /* we need to read it, even if we ignore it */
1145 /*unsigned long tattoo_state = */ (void) ReadBlobMSBLong(image);
1149 case PROP_PARASITES:
1151 /* BOGUS: we may need these for IPTC stuff */
1152 for (i=0; i < (long) prop_size; i++ )
1153 if (ReadBlobByte(image) == EOF)
1154 ThrowFileException(exception,CorruptImageError,
1155 "UnexpectedEndOfFile",image->filename);
1158 glong base = info->cp;
1161 while (info->cp - base < prop_size)
1163 p = xcf_load_parasite (info);
1164 gimp_image_parasite_attach (gimage, p);
1165 gimp_parasite_free (p);
1167 if (info->cp - base != prop_size)
1168 g_message ("Error detected while loading an image's parasites");
1175 /* BOGUS: ignore for now... */
1176 /*unsigned long unit = */ (void) ReadBlobMSBLong(image);
1182 /* BOGUS: just skip it for now */
1183 for (i=0; i< (long) prop_size; i++ )
1184 if (ReadBlobByte(image) == EOF)
1185 ThrowFileException(exception,CorruptImageError,
1186 "UnexpectedEndOfFile",image->filename);
1189 PathList *paths = xcf_load_bzpaths (gimage, info);
1190 gimp_image_set_paths (gimage, paths);
1195 case PROP_USER_UNIT:
1197 char unit_string[1000];
1198 /*BOGUS: ignored for now */
1199 /*float factor = (float) */ (void) ReadBlobMSBLong(image);
1200 /* unsigned long digits = */ (void) ReadBlobMSBLong(image);
1202 (void) ReadBlobStringWithLongSize(image, unit_string,
1203 sizeof(unit_string));
1212 /* read over it... */
1213 while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
1215 amount=(long) MagickMin(16, prop_size);
1216 amount=(long) ReadBlob(image,(size_t) amount,(unsigned char *) &buf);
1218 ThrowReaderException(CorruptImageError,"CorruptImage");
1219 prop_size -= (unsigned long) MagickMin(16,(size_t) amount);
1225 if (foundPropEnd == MagickFalse)
1226 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1228 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
1230 ; /* do nothing, were just pinging! */
1236 foundAllLayers = MagickFalse,
1240 oldPos=TellBlob(image);
1250 long offset = (long) ReadBlobMSBLong(image);
1252 foundAllLayers=MagickTrue;
1255 if (EOFBlob(image) != MagickFalse)
1257 ThrowFileException(exception,CorruptImageError,
1258 "UnexpectedEndOfFile",image->filename);
1261 } while (foundAllLayers == MagickFalse);
1262 offset=SeekBlob(image,oldPos,SEEK_SET); /* restore the position! */
1264 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1265 /* allocate our array of layer info blocks */
1266 length=(size_t) number_layers;
1267 layer_info=(XCFLayerInfo *) AcquireQuantumMemory(length,
1268 sizeof(*layer_info));
1269 if (layer_info == (XCFLayerInfo *) NULL)
1270 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1271 (void) ResetMagickMemory(layer_info,0,number_layers*sizeof(XCFLayerInfo));
1281 /* read in the offset of the next layer */
1282 offset=(MagickOffsetType) ReadBlobMSBLong(image);
1283 /* if the offset is 0 then we are at the end
1284 * of the layer list.
1288 /* save the current position as it is where the
1289 * next layer offset is stored.
1291 saved_pos=TellBlob(image);
1292 /* seek to the layer offset */
1293 offset=SeekBlob(image,offset,SEEK_SET);
1294 /* read in the layer */
1295 layer_ok=ReadOneLayer(image,&doc_info,&layer_info[current_layer]);
1296 if (layer_ok == MagickFalse)
1300 for (j=0; j < current_layer; j++)
1301 layer_info[j].image=DestroyImage(layer_info[j].image);
1302 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1304 /* restore the saved position so we'll be ready to
1305 * read the next offset.
1307 offset=SeekBlob(image, saved_pos, SEEK_SET);
1310 if (number_layers == 1)
1313 Composite the layer data onto the main image, dispose the layer.
1315 (void) CompositeImage(image,OverCompositeOp,layer_info[0].image,
1316 layer_info[0].offset_x,layer_info[0].offset_y);
1317 layer_info[0].image =DestroyImage( layer_info[0].image);
1323 /* NOTE: XCF layers are REVERSED from composite order! */
1325 for (j=number_layers-1; j>=0; j--) {
1326 /* BOGUS: need to consider layer blending modes!! */
1328 if ( layer_info[j].visible ) { /* only visible ones, please! */
1329 CompositeImage(image, OverCompositeOp, layer_info[j].image,
1330 layer_info[j].offset_x, layer_info[j].offset_y );
1331 layer_info[j].image =DestroyImage( layer_info[j].image );
1333 /* Bob says that if we do this, we'll get REAL gray images! */
1334 if ( image_type == GIMP_GRAY ) {
1336 GetQuantizeInfo(&qi);
1337 qi.colorspace = GRAYColorspace;
1338 QuantizeImage( &qi, layer_info[j].image );
1345 /* NOTE: XCF layers are REVERSED from composite order! */
1348 /* first we copy the last layer on top of the main image */
1349 (void) CompositeImage(image,CopyCompositeOp,
1350 layer_info[number_layers-1].image,
1351 layer_info[number_layers-1].offset_x,
1352 layer_info[number_layers-1].offset_y);
1353 layer_info[number_layers-1].image=DestroyImage(
1354 layer_info[number_layers-1].image);
1356 /* now reverse the order of the layers as they are put
1360 image->next=layer_info[j].image;
1361 layer_info[j].image->previous=image;
1362 layer_info[j].image->page.x=layer_info[j].offset_x;
1363 layer_info[j].image->page.y=layer_info[j].offset_y;
1364 layer_info[j].image->page.width=layer_info[j].width;
1365 layer_info[j].image->page.height=layer_info[j].height;
1366 for (j=number_layers-3; j>=0; j--)
1369 layer_info[j].image->next=layer_info[j-1].image;
1370 if (j < (number_layers-1))
1371 layer_info[j].image->previous=layer_info[j+1].image;
1372 layer_info[j].image->page.x=layer_info[j].offset_x;
1373 layer_info[j].image->page.y=layer_info[j].offset_y;
1374 layer_info[j].image->page.width=layer_info[j].width;
1375 layer_info[j].image->page.height=layer_info[j].height;
1381 layer_info=(XCFLayerInfo *) RelinquishMagickMemory(layer_info);
1383 #if 0 /* BOGUS: do we need the channels?? */
1386 /* read in the offset of the next channel */
1387 info->cp += xcf_read_int32 (info->fp, &offset, 1);
1389 /* if the offset is 0 then we are at the end
1390 * of the channel list.
1395 /* save the current position as it is where the
1396 * next channel offset is stored.
1398 saved_pos = info->cp;
1400 /* seek to the channel offset */
1401 xcf_seek_pos (info, offset);
1403 /* read in the layer */
1404 channel = xcf_load_channel (info, gimage);
1408 num_successful_elements++;
1410 /* add the channel to the image if its not the selection */
1411 if (channel != gimage->selection_mask)
1412 gimp_image_add_channel (gimage, channel, -1);
1414 /* restore the saved position so we'll be ready to
1415 * read the next offset.
1417 xcf_seek_pos (info, saved_pos);
1422 (void) CloseBlob(image);
1423 if (image_type == GIMP_GRAY)
1424 image->type=GrayscaleType;
1425 return(GetFirstImageInList(image));
1429 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1433 % R e g i s t e r X C F I m a g e %
1437 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1439 % RegisterXCFImage() adds attributes for the XCF image format to
1440 % the list of supported formats. The attributes include the image format
1441 % tag, a method to read and/or write the format, whether the format
1442 % supports the saving of more than one frame to the same file or blob,
1443 % whether the format supports native in-memory I/O, and a brief
1444 % description of the format.
1446 % The format of the RegisterXCFImage method is:
1448 % unsigned long RegisterXCFImage(void)
1451 ModuleExport unsigned long RegisterXCFImage(void)
1456 entry=SetMagickInfo("XCF");
1457 entry->decoder=(DecodeImageHandler *) ReadXCFImage;
1458 entry->magick=(IsImageFormatHandler *) IsXCF;
1459 entry->description=ConstantString("GIMP image");
1460 entry->module=ConstantString("XCF");
1461 entry->seekable_stream=MagickTrue;
1462 (void) RegisterMagickInfo(entry);
1463 return(MagickImageCoderSignature);
1467 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1471 % U n r e g i s t e r X C F I m a g e %
1475 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1477 % UnregisterXCFImage() removes format registrations made by the
1478 % XCF module from the list of supported formats.
1480 % The format of the UnregisterXCFImage method is:
1482 % UnregisterXCFImage(void)
1485 ModuleExport void UnregisterXCFImage(void)
1487 (void) UnregisterMagickInfo("XCF");