1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % X X CCCC FFFFF %
7 % X X C F %
8 % X C FFF %
9 % X X C F %
10 % X X CCCC F %
11 % %
12 % %
13 % Read GIMP XCF Image Format %
14 % %
15 % Software Design %
16 % Leonard Rosenthol %
17 % November 2001 %
18 % %
19 % %
20 % Copyright 1999-2016 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
22 % %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
25 % %
26 % http://www.imagemagick.org/script/license.php %
27 % %
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. %
33 % %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 %
36 %
37 */
38
39 /*
40 Include declarations.
41 */
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/property.h"
58 #include "MagickCore/quantize.h"
59 #include "MagickCore/quantum-private.h"
60 #include "MagickCore/static.h"
61 #include "MagickCore/string_.h"
62 #include "MagickCore/module.h"
63
64 /*
65 Typedef declarations.
66 */
67 typedef enum
68 {
69 GIMP_RGB,
70 GIMP_GRAY,
71 GIMP_INDEXED
72 } GimpImageBaseType;
73
74 typedef enum
75 {
76 PROP_END = 0,
77 PROP_COLORMAP = 1,
78 PROP_ACTIVE_LAYER = 2,
79 PROP_ACTIVE_CHANNEL = 3,
80 PROP_SELECTION = 4,
81 PROP_FLOATING_SELECTION = 5,
82 PROP_OPACITY = 6,
83 PROP_MODE = 7,
84 PROP_VISIBLE = 8,
85 PROP_LINKED = 9,
86 PROP_PRESERVE_TRANSPARENCY = 10,
87 PROP_APPLY_MASK = 11,
88 PROP_EDIT_MASK = 12,
89 PROP_SHOW_MASK = 13,
90 PROP_SHOW_MASKED = 14,
91 PROP_OFFSETS = 15,
92 PROP_COLOR = 16,
93 PROP_COMPRESSION = 17,
94 PROP_GUIDES = 18,
95 PROP_RESOLUTION = 19,
96 PROP_TATTOO = 20,
97 PROP_PARASITES = 21,
98 PROP_UNIT = 22,
99 PROP_PATHS = 23,
100 PROP_USER_UNIT = 24
101 } PropType;
102
103 typedef enum
104 {
105 COMPRESS_NONE = 0,
106 COMPRESS_RLE = 1,
107 COMPRESS_ZLIB = 2, /* unused */
108 COMPRESS_FRACTAL = 3 /* unused */
109 } XcfCompressionType;
110
111 typedef struct
112 {
113 size_t
114 width,
115 height,
116 image_type,
117 bytes_per_pixel;
118
119 int
120 compression;
121
122 size_t
123 file_size;
124
125 size_t
126 number_layers;
127 } XCFDocInfo;
128
129 typedef struct
130 {
131 char
132 name[1024];
133
134 unsigned int
135 active;
136
137 size_t
138 width,
139 height,
140 type,
141 alpha,
142 visible,
143 linked,
144 preserve_trans,
145 apply_mask,
146 show_mask,
147 edit_mask,
148 floating_offset;
149
150 ssize_t
151 offset_x,
152 offset_y;
153
154 size_t
155 mode,
156 tattoo;
157
158 Image
159 *image;
160 } XCFLayerInfo;
161
162 #define TILE_WIDTH 64
163 #define TILE_HEIGHT 64
164
165 typedef struct
166 {
167 unsigned char
168 red,
169 green,
170 blue,
171 alpha;
172 } XCFPixelInfo;
173
174 /*
175 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
176 % %
177 % %
178 % %
179 % I s X C F %
180 % %
181 % %
182 % %
183 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
184 %
185 % IsXCF() returns MagickTrue if the image format type, identified by the
186 % magick string, is XCF (GIMP native format).
187 %
188 % The format of the IsXCF method is:
189 %
190 % MagickBooleanType IsXCF(const unsigned char *magick,const size_t length)
191 %
192 % A description of each parameter follows:
193 %
194 % o magick: compare image format pattern against these bytes.
195 %
196 % o length: Specifies the length of the magick string.
197 %
198 %
199 */
IsXCF(const unsigned char * magick,const size_t length)200 static MagickBooleanType IsXCF(const unsigned char *magick,const size_t length)
201 {
202 if (length < 8)
203 return(MagickFalse);
204 if (LocaleNCompare((char *) magick,"gimp xcf",8) == 0)
205 return(MagickTrue);
206 return(MagickFalse);
207 }
208
209 typedef enum
210 {
211 GIMP_NORMAL_MODE,
212 GIMP_DISSOLVE_MODE,
213 GIMP_BEHIND_MODE,
214 GIMP_MULTIPLY_MODE,
215 GIMP_SCREEN_MODE,
216 GIMP_OVERLAY_MODE,
217 GIMP_DIFFERENCE_MODE,
218 GIMP_ADDITION_MODE,
219 GIMP_SUBTRACT_MODE,
220 GIMP_DARKEN_ONLY_MODE,
221 GIMP_LIGHTEN_ONLY_MODE,
222 GIMP_HUE_MODE,
223 GIMP_SATURATION_MODE,
224 GIMP_COLOR_MODE,
225 GIMP_VALUE_MODE,
226 GIMP_DIVIDE_MODE,
227 GIMP_DODGE_MODE,
228 GIMP_BURN_MODE,
229 GIMP_HARDLIGHT_MODE
230 } GimpLayerModeEffects;
231
232 /*
233 Simple utility routine to convert between PSD blending modes and
234 ImageMagick compositing operators
235 */
GIMPBlendModeToCompositeOperator(size_t blendMode)236 static CompositeOperator GIMPBlendModeToCompositeOperator(
237 size_t blendMode)
238 {
239 switch ( blendMode )
240 {
241 case GIMP_NORMAL_MODE: return(OverCompositeOp);
242 case GIMP_DISSOLVE_MODE: return(DissolveCompositeOp);
243 case GIMP_MULTIPLY_MODE: return(MultiplyCompositeOp);
244 case GIMP_SCREEN_MODE: return(ScreenCompositeOp);
245 case GIMP_OVERLAY_MODE: return(OverlayCompositeOp);
246 case GIMP_DIFFERENCE_MODE: return(DifferenceCompositeOp);
247 case GIMP_ADDITION_MODE: return(ModulusAddCompositeOp);
248 case GIMP_SUBTRACT_MODE: return(ModulusSubtractCompositeOp);
249 case GIMP_DARKEN_ONLY_MODE: return(DarkenCompositeOp);
250 case GIMP_LIGHTEN_ONLY_MODE: return(LightenCompositeOp);
251 case GIMP_HUE_MODE: return(HueCompositeOp);
252 case GIMP_SATURATION_MODE: return(SaturateCompositeOp);
253 case GIMP_COLOR_MODE: return(ColorizeCompositeOp);
254 case GIMP_DODGE_MODE: return(ColorDodgeCompositeOp);
255 case GIMP_BURN_MODE: return(ColorBurnCompositeOp);
256 case GIMP_HARDLIGHT_MODE: return(HardLightCompositeOp);
257 case GIMP_DIVIDE_MODE: return(DivideDstCompositeOp);
258 /* these are the ones we don't support...yet */
259 case GIMP_BEHIND_MODE: return(OverCompositeOp);
260 case GIMP_VALUE_MODE: return(OverCompositeOp);
261 default: return(OverCompositeOp);
262 }
263 }
264
265 /*
266 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
267 % %
268 % %
269 % %
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 %
271 % %
272 % %
273 % %
274 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
275 %
276 % ReadBlobStringWithLongSize reads characters from a blob or file
277 % starting with a ssize_t length byte and then characters to that length
278 %
279 % The format of the ReadBlobStringWithLongSize method is:
280 %
281 % char *ReadBlobStringWithLongSize(Image *image,char *string)
282 %
283 % A description of each parameter follows:
284 %
285 % o image: the image.
286 %
287 % o string: the address of a character buffer.
288 %
289 */
290
ReadBlobStringWithLongSize(Image * image,char * string,size_t max,ExceptionInfo * exception)291 static char *ReadBlobStringWithLongSize(Image *image,char *string,size_t max,
292 ExceptionInfo *exception)
293 {
294 int
295 c;
296
297 MagickOffsetType
298 offset;
299
300 register ssize_t
301 i;
302
303 size_t
304 length;
305
306 assert(image != (Image *) NULL);
307 assert(image->signature == MagickCoreSignature);
308 assert(max != 0);
309 if (image->debug != MagickFalse)
310 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
311 length=ReadBlobMSBLong(image);
312 for (i=0; i < (ssize_t) MagickMin(length,max-1); i++)
313 {
314 c=ReadBlobByte(image);
315 if (c == EOF)
316 return((char *) NULL);
317 string[i]=(char) c;
318 }
319 string[i]='\0';
320 offset=SeekBlob(image,(MagickOffsetType) (length-i),SEEK_CUR);
321 if (offset < 0)
322 (void) ThrowMagickException(exception,GetMagickModule(),
323 CorruptImageError,"ImproperImageHeader","`%s'",image->filename);
324 return(string);
325 }
326
load_tile(Image * image,Image * tile_image,XCFDocInfo * inDocInfo,XCFLayerInfo * inLayerInfo,size_t data_length,ExceptionInfo * exception)327 static MagickBooleanType load_tile(Image *image,Image *tile_image,
328 XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
329 ExceptionInfo *exception)
330 {
331 ssize_t
332 y;
333
334 register ssize_t
335 x;
336
337 register Quantum
338 *q;
339
340 size_t
341 extent;
342
343 ssize_t
344 count;
345
346 unsigned char
347 *graydata;
348
349 XCFPixelInfo
350 *xcfdata,
351 *xcfodata;
352
353 extent=0;
354 if (inDocInfo->image_type == GIMP_GRAY)
355 extent=tile_image->columns*tile_image->rows*sizeof(*graydata);
356 else
357 if (inDocInfo->image_type == GIMP_RGB)
358 extent=tile_image->columns*tile_image->rows*sizeof(*xcfdata);
359 if (extent > data_length)
360 ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
361 image->filename);
362 xcfdata=(XCFPixelInfo *) AcquireQuantumMemory(MagickMax(data_length,
363 tile_image->columns*tile_image->rows),sizeof(*xcfdata));
364 if (xcfdata == (XCFPixelInfo *) NULL)
365 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
366 image->filename);
367 xcfodata=xcfdata;
368 graydata=(unsigned char *) xcfdata; /* used by gray and indexed */
369 count=ReadBlob(image,data_length,(unsigned char *) xcfdata);
370 if (count != (ssize_t) data_length)
371 ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
372 image->filename);
373 for (y=0; y < (ssize_t) tile_image->rows; y++)
374 {
375 q=GetAuthenticPixels(tile_image,0,y,tile_image->columns,1,exception);
376 if (q == (Quantum *) NULL)
377 break;
378 if (inDocInfo->image_type == GIMP_GRAY)
379 {
380 for (x=0; x < (ssize_t) tile_image->columns; x++)
381 {
382 SetPixelGray(tile_image,ScaleCharToQuantum(*graydata),q);
383 SetPixelAlpha(tile_image,ScaleCharToQuantum((unsigned char)
384 inLayerInfo->alpha),q);
385 graydata++;
386 q+=GetPixelChannels(tile_image);
387 }
388 }
389 else
390 if (inDocInfo->image_type == GIMP_RGB)
391 {
392 for (x=0; x < (ssize_t) tile_image->columns; x++)
393 {
394 SetPixelRed(tile_image,ScaleCharToQuantum(xcfdata->red),q);
395 SetPixelGreen(tile_image,ScaleCharToQuantum(xcfdata->green),q);
396 SetPixelBlue(tile_image,ScaleCharToQuantum(xcfdata->blue),q);
397 SetPixelAlpha(tile_image,xcfdata->alpha == 255U ? TransparentAlpha :
398 ScaleCharToQuantum((unsigned char) inLayerInfo->alpha),q);
399 xcfdata++;
400 q+=GetPixelChannels(tile_image);
401 }
402 }
403 if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
404 break;
405 }
406 xcfodata=(XCFPixelInfo *) RelinquishMagickMemory(xcfodata);
407 return MagickTrue;
408 }
409
load_tile_rle(Image * image,Image * tile_image,XCFDocInfo * inDocInfo,XCFLayerInfo * inLayerInfo,size_t data_length,ExceptionInfo * exception)410 static MagickBooleanType load_tile_rle(Image *image,Image *tile_image,
411 XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
412 ExceptionInfo *exception)
413 {
414 MagickOffsetType
415 size;
416
417 Quantum
418 alpha;
419
420 register Quantum
421 *q;
422
423 size_t
424 length;
425
426 ssize_t
427 bytes_per_pixel,
428 count,
429 i,
430 j;
431
432 unsigned char
433 data,
434 pixel,
435 *xcfdata,
436 *xcfodata,
437 *xcfdatalimit;
438
439 bytes_per_pixel=(ssize_t) inDocInfo->bytes_per_pixel;
440 xcfdata=(unsigned char *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
441 if (xcfdata == (unsigned char *) NULL)
442 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
443 image->filename);
444 xcfodata=xcfdata;
445 count=ReadBlob(image, (size_t) data_length, xcfdata);
446 xcfdatalimit = xcfodata+count-1;
447 alpha=ScaleCharToQuantum((unsigned char) inLayerInfo->alpha);
448 for (i=0; i < (ssize_t) bytes_per_pixel; i++)
449 {
450 q=GetAuthenticPixels(tile_image,0,0,tile_image->columns,tile_image->rows,
451 exception);
452 if (q == (Quantum *) NULL)
453 continue;
454 size=(MagickOffsetType) tile_image->rows*tile_image->columns;
455 while (size > 0)
456 {
457 if (xcfdata > xcfdatalimit)
458 goto bogus_rle;
459 pixel=(*xcfdata++);
460 length=(size_t) pixel;
461 if (length >= 128)
462 {
463 length=255-(length-1);
464 if (length == 128)
465 {
466 if (xcfdata >= xcfdatalimit)
467 goto bogus_rle;
468 length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
469 xcfdata+=2;
470 }
471 size-=length;
472 if (size < 0)
473 goto bogus_rle;
474 if (&xcfdata[length-1] > xcfdatalimit)
475 goto bogus_rle;
476 while (length-- > 0)
477 {
478 data=(*xcfdata++);
479 switch (i)
480 {
481 case 0:
482 {
483 if (inDocInfo->image_type == GIMP_GRAY)
484 SetPixelGray(tile_image,ScaleCharToQuantum(data),q);
485 else
486 {
487 SetPixelRed(tile_image,ScaleCharToQuantum(data),q);
488 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
489 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
490 }
491 SetPixelAlpha(tile_image,alpha,q);
492 break;
493 }
494 case 1:
495 {
496 if (inDocInfo->image_type == GIMP_GRAY)
497 SetPixelAlpha(tile_image,ScaleCharToQuantum(data),q);
498 else
499 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
500 break;
501 }
502 case 2:
503 {
504 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
505 break;
506 }
507 case 3:
508 {
509 SetPixelAlpha(tile_image,ScaleCharToQuantum(data),q);
510 break;
511 }
512 }
513 q+=GetPixelChannels(tile_image);
514 }
515 }
516 else
517 {
518 length+=1;
519 if (length == 128)
520 {
521 if (xcfdata >= xcfdatalimit)
522 goto bogus_rle;
523 length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
524 xcfdata+=2;
525 }
526 size-=length;
527 if (size < 0)
528 goto bogus_rle;
529 if (xcfdata > xcfdatalimit)
530 goto bogus_rle;
531 pixel=(*xcfdata++);
532 for (j=0; j < (ssize_t) length; j++)
533 {
534 data=pixel;
535 switch (i)
536 {
537 case 0:
538 {
539 if (inDocInfo->image_type == GIMP_GRAY)
540 SetPixelGray(tile_image,ScaleCharToQuantum(data),q);
541 else
542 {
543 SetPixelRed(tile_image,ScaleCharToQuantum(data),q);
544 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
545 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
546 }
547 SetPixelAlpha(tile_image,alpha,q);
548 break;
549 }
550 case 1:
551 {
552 if (inDocInfo->image_type == GIMP_GRAY)
553 SetPixelAlpha(tile_image,ScaleCharToQuantum(data),q);
554 else
555 SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
556 break;
557 }
558 case 2:
559 {
560 SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
561 break;
562 }
563 case 3:
564 {
565 SetPixelAlpha(tile_image,ScaleCharToQuantum(data),q);
566 break;
567 }
568 }
569 q+=GetPixelChannels(tile_image);
570 }
571 }
572 }
573 if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
574 break;
575 }
576 xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
577 return(MagickTrue);
578
579 bogus_rle:
580 if (xcfodata != (unsigned char *) NULL)
581 xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
582 return(MagickFalse);
583 }
584
load_level(Image * image,XCFDocInfo * inDocInfo,XCFLayerInfo * inLayerInfo,ExceptionInfo * exception)585 static MagickBooleanType load_level(Image *image,XCFDocInfo *inDocInfo,
586 XCFLayerInfo *inLayerInfo,ExceptionInfo *exception)
587 {
588 int
589 destLeft = 0,
590 destTop = 0;
591
592 Image*
593 tile_image;
594
595 MagickBooleanType
596 status;
597
598 MagickOffsetType
599 saved_pos,
600 offset,
601 offset2;
602
603 register ssize_t
604 i;
605
606 size_t
607 width,
608 height,
609 ntiles,
610 ntile_rows,
611 ntile_cols,
612 tile_image_width,
613 tile_image_height;
614
615 /* start reading the data */
616 width=ReadBlobMSBLong(image);
617 height=ReadBlobMSBLong(image);
618
619 /* read in the first tile offset.
620 * if it is '0', then this tile level is empty
621 * and we can simply return.
622 */
623 offset=(MagickOffsetType) ReadBlobMSBLong(image);
624 if (offset == 0)
625 return(MagickTrue);
626 /* Initialise the reference for the in-memory tile-compression
627 */
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++)
632 {
633 status=MagickFalse;
634 if (offset == 0)
635 ThrowBinaryException(CorruptImageError,"NotEnoughTiles",image->filename);
636 /* save the current position as it is where the
637 * next tile offset is stored.
638 */
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 */
645 if (offset2 == 0)
646 offset2=(MagickOffsetType) (offset + TILE_WIDTH * TILE_WIDTH * 4* 1.5);
647 /* seek to the tile offset */
648 offset=SeekBlob(image, offset, SEEK_SET);
649
650 /*
651 Allocate the image for the tile. NOTE: the last tile in a row or
652 column may not be a full tile!
653 */
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);
664
665 /* read in the tile */
666 switch (inDocInfo->compression)
667 {
668 case COMPRESS_NONE:
669 if (load_tile(image,tile_image,inDocInfo,inLayerInfo,(size_t) (offset2-offset),exception) == 0)
670 status=MagickTrue;
671 break;
672 case COMPRESS_RLE:
673 if (load_tile_rle (image,tile_image,inDocInfo,inLayerInfo,
674 (int) (offset2-offset),exception) == 0)
675 status=MagickTrue;
676 break;
677 case COMPRESS_ZLIB:
678 ThrowBinaryException(CoderError,"ZipCompressNotSupported",
679 image->filename)
680 case COMPRESS_FRACTAL:
681 ThrowBinaryException(CoderError,"FractalCompressNotSupported",
682 image->filename)
683 }
684
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);
689
690 /* adjust tile position */
691 destLeft++;
692 if (destLeft >= (int) ntile_cols)
693 {
694 destLeft = 0;
695 destTop++;
696 }
697 if (status != MagickFalse)
698 return(MagickFalse);
699 /* restore the saved position so we'll be ready to
700 * read the next offset.
701 */
702 offset=SeekBlob(image, saved_pos, SEEK_SET);
703 /* read in the offset of the next tile */
704 offset=(MagickOffsetType) ReadBlobMSBLong(image);
705 }
706 if (offset != 0)
707 ThrowBinaryException(CorruptImageError,"CorruptImage",image->filename)
708 return(MagickTrue);
709 }
710
load_hierarchy(Image * image,XCFDocInfo * inDocInfo,XCFLayerInfo * inLayer,ExceptionInfo * exception)711 static MagickBooleanType load_hierarchy(Image *image,XCFDocInfo *inDocInfo,
712 XCFLayerInfo *inLayer, ExceptionInfo *exception)
713 {
714 MagickOffsetType
715 saved_pos,
716 offset,
717 junk;
718
719 size_t
720 width,
721 height,
722 bytes_per_pixel;
723
724 width=ReadBlobMSBLong(image);
725 (void) width;
726 height=ReadBlobMSBLong(image);
727 (void) height;
728 bytes_per_pixel=inDocInfo->bytes_per_pixel=ReadBlobMSBLong(image);
729 (void) bytes_per_pixel;
730
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.
734 */
735 offset=(MagickOffsetType) ReadBlobMSBLong(image); /* top level */
736
737 /* discard offsets for layers below first, if any.
738 */
739 do
740 {
741 junk=(MagickOffsetType) ReadBlobMSBLong(image);
742 }
743 while (junk != 0);
744
745 /* save the current position as it is where the
746 * next level offset is stored.
747 */
748 saved_pos=TellBlob(image);
749
750 /* seek to the level offset */
751 offset=SeekBlob(image, offset, SEEK_SET);
752
753 /* read in the level */
754 if (load_level (image, inDocInfo, inLayer, exception) == 0)
755 return(MagickFalse);
756 /* restore the saved position so we'll be ready to
757 * read the next offset.
758 */
759 offset=SeekBlob(image, saved_pos, SEEK_SET);
760 return(MagickTrue);
761 }
762
InitXCFImage(XCFLayerInfo * outLayer,ExceptionInfo * exception)763 static void InitXCFImage(XCFLayerInfo *outLayer,ExceptionInfo *exception)
764 {
765 outLayer->image->page.x=outLayer->offset_x;
766 outLayer->image->page.y=outLayer->offset_y;
767 outLayer->image->page.width=outLayer->width;
768 outLayer->image->page.height=outLayer->height;
769 (void) SetImageProperty(outLayer->image,"label",(char *)outLayer->name,
770 exception);
771 }
772
ReadOneLayer(const ImageInfo * image_info,Image * image,XCFDocInfo * inDocInfo,XCFLayerInfo * outLayer,const ssize_t layer,ExceptionInfo * exception)773 static MagickBooleanType ReadOneLayer(const ImageInfo *image_info,Image* image,
774 XCFDocInfo* inDocInfo,XCFLayerInfo *outLayer,const ssize_t layer,
775 ExceptionInfo *exception)
776 {
777 MagickOffsetType
778 offset;
779
780 unsigned int
781 foundPropEnd = 0;
782
783 size_t
784 hierarchy_offset,
785 layer_mask_offset;
786
787 /* clear the block! */
788 (void) ResetMagickMemory( outLayer, 0, sizeof( XCFLayerInfo ) );
789 /* read in the layer width, height, type and name */
790 outLayer->width = ReadBlobMSBLong(image);
791 outLayer->height = ReadBlobMSBLong(image);
792 outLayer->type = ReadBlobMSBLong(image);
793 (void) ReadBlobStringWithLongSize(image, outLayer->name,
794 sizeof(outLayer->name),exception);
795 /* read the layer properties! */
796 foundPropEnd = 0;
797 while ( (foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse) ) {
798 PropType prop_type = (PropType) ReadBlobMSBLong(image);
799 size_t prop_size = ReadBlobMSBLong(image);
800 switch (prop_type)
801 {
802 case PROP_END:
803 foundPropEnd = 1;
804 break;
805 case PROP_ACTIVE_LAYER:
806 outLayer->active = 1;
807 break;
808 case PROP_FLOATING_SELECTION:
809 outLayer->floating_offset = ReadBlobMSBLong(image);
810 break;
811 case PROP_OPACITY:
812 outLayer->alpha = ReadBlobMSBLong(image);
813 break;
814 case PROP_VISIBLE:
815 outLayer->visible = ReadBlobMSBLong(image);
816 break;
817 case PROP_LINKED:
818 outLayer->linked = ReadBlobMSBLong(image);
819 break;
820 case PROP_PRESERVE_TRANSPARENCY:
821 outLayer->preserve_trans = ReadBlobMSBLong(image);
822 break;
823 case PROP_APPLY_MASK:
824 outLayer->apply_mask = ReadBlobMSBLong(image);
825 break;
826 case PROP_EDIT_MASK:
827 outLayer->edit_mask = ReadBlobMSBLong(image);
828 break;
829 case PROP_SHOW_MASK:
830 outLayer->show_mask = ReadBlobMSBLong(image);
831 break;
832 case PROP_OFFSETS:
833 outLayer->offset_x = ReadBlobMSBSignedLong(image);
834 outLayer->offset_y = ReadBlobMSBSignedLong(image);
835 break;
836 case PROP_MODE:
837 outLayer->mode = ReadBlobMSBLong(image);
838 break;
839 case PROP_TATTOO:
840 outLayer->preserve_trans = ReadBlobMSBLong(image);
841 break;
842 case PROP_PARASITES:
843 {
844 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
845 ThrowFileException(exception,CorruptImageError,
846 "UnexpectedEndOfFile",image->filename);
847
848 /*
849 ssize_t base = info->cp;
850 GimpParasite *p;
851 while (info->cp - base < prop_size)
852 {
853 p = xcf_load_parasite(info);
854 gimp_drawable_parasite_attach(GIMP_DRAWABLE(layer), p);
855 gimp_parasite_free(p);
856 }
857 if (info->cp - base != prop_size)
858 g_message ("Error detected while loading a layer's parasites");
859 */
860 }
861 break;
862 default:
863 /* g_message ("unexpected/unknown layer property: %d (skipping)",
864 prop_type); */
865
866 {
867 int buf[16];
868 ssize_t amount;
869
870 /* read over it... */
871 while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
872 {
873 amount = (ssize_t) MagickMin(16, prop_size);
874 amount = ReadBlob(image, (size_t) amount, (unsigned char *) &buf);
875 if (!amount)
876 ThrowBinaryException(CorruptImageError,"CorruptImage",
877 image->filename);
878 prop_size -= (size_t) MagickMin(16, (size_t) amount);
879 }
880 }
881 break;
882 }
883 }
884
885 if (foundPropEnd == MagickFalse)
886 return(MagickFalse);
887 /* allocate the image for this layer */
888 if (image_info->number_scenes != 0)
889 {
890 ssize_t
891 scene;
892
893 scene=inDocInfo->number_layers-layer-1;
894 if (scene > (ssize_t) (image_info->scene+image_info->number_scenes-1))
895 {
896 outLayer->image=CloneImage(image,0,0,MagickTrue,exception);
897 if (outLayer->image == (Image *) NULL)
898 return(MagickFalse);
899 InitXCFImage(outLayer,exception);
900 return(MagickTrue);
901 }
902 }
903 outLayer->image=CloneImage(image,outLayer->width, outLayer->height,MagickTrue,
904 exception);
905 if (outLayer->image == (Image *) NULL)
906 return(MagickFalse);
907 /* clear the image based on the layer opacity */
908 outLayer->image->background_color.alpha=
909 ScaleCharToQuantum((unsigned char) outLayer->alpha);
910 (void) SetImageBackgroundColor(outLayer->image,exception);
911
912 InitXCFImage(outLayer,exception);
913
914 /* set the compositing mode */
915 outLayer->image->compose = GIMPBlendModeToCompositeOperator( outLayer->mode );
916 if ( outLayer->visible == MagickFalse )
917 {
918 /* BOGUS: should really be separate member var! */
919 outLayer->image->compose = NoCompositeOp;
920 }
921
922 /* read the hierarchy and layer mask offsets */
923 hierarchy_offset = ReadBlobMSBLong(image);
924 layer_mask_offset = ReadBlobMSBLong(image);
925
926 /* read in the hierarchy */
927 offset=SeekBlob(image, (MagickOffsetType) hierarchy_offset, SEEK_SET);
928 if (offset < 0)
929 (void) ThrowMagickException(exception,GetMagickModule(),
930 CorruptImageError,"InvalidImageHeader","`%s'",image->filename);
931 if (load_hierarchy (image, inDocInfo, outLayer, exception) == 0)
932 return(MagickFalse);
933
934 /* read in the layer mask */
935 if (layer_mask_offset != 0)
936 {
937 offset=SeekBlob(image, (MagickOffsetType) layer_mask_offset, SEEK_SET);
938
939 #if 0 /* BOGUS: support layer masks! */
940 layer_mask = xcf_load_layer_mask (info, gimage);
941 if (layer_mask == 0)
942 goto error;
943
944 /* set the offsets of the layer_mask */
945 GIMP_DRAWABLE (layer_mask)->offset_x = GIMP_DRAWABLE (layer)->offset_x;
946 GIMP_DRAWABLE (layer_mask)->offset_y = GIMP_DRAWABLE (layer)->offset_y;
947
948 gimp_layer_add_mask (layer, layer_mask, MagickFalse);
949
950 layer->mask->apply_mask = apply_mask;
951 layer->mask->edit_mask = edit_mask;
952 layer->mask->show_mask = show_mask;
953 #endif
954 }
955
956 /* attach the floating selection... */
957 #if 0 /* BOGUS: we may need to read this, even if we don't support it! */
958 if (add_floating_sel)
959 {
960 GimpLayer *floating_sel;
961
962 floating_sel = info->floating_sel;
963 floating_sel_attach (floating_sel, GIMP_DRAWABLE (layer));
964 }
965 #endif
966
967 return MagickTrue;
968 }
969
970 /*
971 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
972 % %
973 % %
974 % %
975 % R e a d X C F I m a g e %
976 % %
977 % %
978 % %
979 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
980 %
981 % ReadXCFImage() reads a GIMP (GNU Image Manipulation Program) image
982 % file and returns it. It allocates the memory necessary for the new Image
983 % structure and returns a pointer to the new image.
984 %
985 % The format of the ReadXCFImage method is:
986 %
987 % image=ReadXCFImage(image_info)
988 %
989 % A description of each parameter follows:
990 %
991 % o image_info: the image info.
992 %
993 % o exception: return any errors or warnings in this structure.
994 %
995 */
ReadXCFImage(const ImageInfo * image_info,ExceptionInfo * exception)996 static Image *ReadXCFImage(const ImageInfo *image_info,ExceptionInfo *exception)
997 {
998 char
999 magick[14];
1000
1001 Image
1002 *image;
1003
1004 int
1005 foundPropEnd = 0;
1006
1007 MagickBooleanType
1008 status;
1009
1010 MagickOffsetType
1011 offset;
1012
1013 register ssize_t
1014 i;
1015
1016 size_t
1017 image_type,
1018 length;
1019
1020 ssize_t
1021 count;
1022
1023 XCFDocInfo
1024 doc_info;
1025
1026 /*
1027 Open image file.
1028 */
1029 assert(image_info != (const ImageInfo *) NULL);
1030 assert(image_info->signature == MagickCoreSignature);
1031 if (image_info->debug != MagickFalse)
1032 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
1033 image_info->filename);
1034 assert(exception != (ExceptionInfo *) NULL);
1035 assert(exception->signature == MagickCoreSignature);
1036 image=AcquireImage(image_info,exception);
1037 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
1038 if (status == MagickFalse)
1039 {
1040 image=DestroyImageList(image);
1041 return((Image *) NULL);
1042 }
1043 count=ReadBlob(image,14,(unsigned char *) magick);
1044 if ((count != 14) ||
1045 (LocaleNCompare((char *) magick,"gimp xcf",8) != 0))
1046 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1047 (void) ResetMagickMemory(&doc_info,0,sizeof(XCFDocInfo));
1048 doc_info.width=ReadBlobMSBLong(image);
1049 doc_info.height=ReadBlobMSBLong(image);
1050 if ((doc_info.width > 262144) || (doc_info.height > 262144))
1051 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1052 doc_info.image_type=ReadBlobMSBLong(image);
1053 /*
1054 Initialize image attributes.
1055 */
1056 image->columns=doc_info.width;
1057 image->rows=doc_info.height;
1058 image_type=doc_info.image_type;
1059 doc_info.file_size=GetBlobSize(image);
1060 image->compression=NoCompression;
1061 image->depth=8;
1062 status=SetImageExtent(image,image->columns,image->rows,exception);
1063 if (status == MagickFalse)
1064 return(DestroyImageList(image));
1065 if (image_type == GIMP_RGB)
1066 SetImageColorspace(image,sRGBColorspace,exception);
1067 else
1068 if (image_type == GIMP_GRAY)
1069 SetImageColorspace(image,GRAYColorspace,exception);
1070 else
1071 if (image_type == GIMP_INDEXED)
1072 ThrowReaderException(CoderError,"ColormapTypeNotSupported");
1073 (void) SetImageBackgroundColor(image,exception);
1074 (void) SetImageAlpha(image,OpaqueAlpha,exception);
1075 /*
1076 Read properties.
1077 */
1078 while ((foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse))
1079 {
1080 PropType prop_type = (PropType) ReadBlobMSBLong(image);
1081 size_t prop_size = ReadBlobMSBLong(image);
1082
1083 switch (prop_type)
1084 {
1085 case PROP_END:
1086 foundPropEnd=1;
1087 break;
1088 case PROP_COLORMAP:
1089 {
1090 /* Cannot rely on prop_size here--the value is set incorrectly
1091 by some Gimp versions.
1092 */
1093 size_t num_colours = ReadBlobMSBLong(image);
1094 if (DiscardBlobBytes(image,3*num_colours) == MagickFalse)
1095 ThrowFileException(exception,CorruptImageError,
1096 "UnexpectedEndOfFile",image->filename);
1097 /*
1098 if (info->file_version == 0)
1099 {
1100 gint i;
1101
1102 g_message (_("XCF warning: version 0 of XCF file format\n"
1103 "did not save indexed colormaps correctly.\n"
1104 "Substituting grayscale map."));
1105 info->cp +=
1106 xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
1107 gimage->cmap = g_new (guchar, gimage->num_cols*3);
1108 xcf_seek_pos (info, info->cp + gimage->num_cols);
1109 for (i = 0; i<gimage->num_cols; i++)
1110 {
1111 gimage->cmap[i*3+0] = i;
1112 gimage->cmap[i*3+1] = i;
1113 gimage->cmap[i*3+2] = i;
1114 }
1115 }
1116 else
1117 {
1118 info->cp +=
1119 xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
1120 gimage->cmap = g_new (guchar, gimage->num_cols*3);
1121 info->cp +=
1122 xcf_read_int8 (info->fp,
1123 (guint8*) gimage->cmap, gimage->num_cols*3);
1124 }
1125 */
1126 break;
1127 }
1128 case PROP_COMPRESSION:
1129 {
1130 doc_info.compression = ReadBlobByte(image);
1131 if ((doc_info.compression != COMPRESS_NONE) &&
1132 (doc_info.compression != COMPRESS_RLE) &&
1133 (doc_info.compression != COMPRESS_ZLIB) &&
1134 (doc_info.compression != COMPRESS_FRACTAL))
1135 ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
1136 }
1137 break;
1138
1139 case PROP_GUIDES:
1140 {
1141 /* just skip it - we don't care about guides */
1142 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1143 ThrowFileException(exception,CorruptImageError,
1144 "UnexpectedEndOfFile",image->filename);
1145 }
1146 break;
1147
1148 case PROP_RESOLUTION:
1149 {
1150 /* float xres = (float) */ (void) ReadBlobMSBLong(image);
1151 /* float yres = (float) */ (void) ReadBlobMSBLong(image);
1152
1153 /*
1154 if (xres < GIMP_MIN_RESOLUTION || xres > GIMP_MAX_RESOLUTION ||
1155 yres < GIMP_MIN_RESOLUTION || yres > GIMP_MAX_RESOLUTION)
1156 {
1157 g_message ("Warning, resolution out of range in XCF file");
1158 xres = gimage->gimp->config->default_xresolution;
1159 yres = gimage->gimp->config->default_yresolution;
1160 }
1161 */
1162
1163
1164 /* BOGUS: we don't write these yet because we aren't
1165 reading them properly yet :(
1166 image->resolution.x = xres;
1167 image->resolution.y = yres;
1168 */
1169 }
1170 break;
1171
1172 case PROP_TATTOO:
1173 {
1174 /* we need to read it, even if we ignore it */
1175 /*size_t tattoo_state = */ (void) ReadBlobMSBLong(image);
1176 }
1177 break;
1178
1179 case PROP_PARASITES:
1180 {
1181 /* BOGUS: we may need these for IPTC stuff */
1182 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1183 ThrowFileException(exception,CorruptImageError,
1184 "UnexpectedEndOfFile",image->filename);
1185 /*
1186 gssize_t base = info->cp;
1187 GimpParasite *p;
1188
1189 while (info->cp - base < prop_size)
1190 {
1191 p = xcf_load_parasite (info);
1192 gimp_image_parasite_attach (gimage, p);
1193 gimp_parasite_free (p);
1194 }
1195 if (info->cp - base != prop_size)
1196 g_message ("Error detected while loading an image's parasites");
1197 */
1198 }
1199 break;
1200
1201 case PROP_UNIT:
1202 {
1203 /* BOGUS: ignore for now... */
1204 /*size_t unit = */ (void) ReadBlobMSBLong(image);
1205 }
1206 break;
1207
1208 case PROP_PATHS:
1209 {
1210 /* BOGUS: just skip it for now */
1211 if (DiscardBlobBytes(image,prop_size) == MagickFalse)
1212 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
1213 image->filename);
1214
1215 /*
1216 PathList *paths = xcf_load_bzpaths (gimage, info);
1217 gimp_image_set_paths (gimage, paths);
1218 */
1219 }
1220 break;
1221
1222 case PROP_USER_UNIT:
1223 {
1224 char unit_string[1000];
1225 /*BOGUS: ignored for now */
1226 /*float factor = (float) */ (void) ReadBlobMSBLong(image);
1227 /* size_t digits = */ (void) ReadBlobMSBLong(image);
1228 for (i=0; i<5; i++)
1229 (void) ReadBlobStringWithLongSize(image, unit_string,
1230 sizeof(unit_string),exception);
1231 }
1232 break;
1233
1234 default:
1235 {
1236 int buf[16];
1237 ssize_t amount;
1238
1239 /* read over it... */
1240 while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
1241 {
1242 amount=(ssize_t) MagickMin(16, prop_size);
1243 amount=(ssize_t) ReadBlob(image,(size_t) amount,(unsigned char *) &buf);
1244 if (!amount)
1245 ThrowReaderException(CorruptImageError,"CorruptImage");
1246 prop_size -= (size_t) MagickMin(16,(size_t) amount);
1247 }
1248 }
1249 break;
1250 }
1251 }
1252 if (foundPropEnd == MagickFalse)
1253 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1254
1255 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
1256 {
1257 ; /* do nothing, were just pinging! */
1258 }
1259 else
1260 {
1261 int
1262 current_layer = 0,
1263 foundAllLayers = MagickFalse,
1264 number_layers = 0;
1265
1266 MagickOffsetType
1267 oldPos=TellBlob(image);
1268
1269 XCFLayerInfo
1270 *layer_info;
1271
1272 /*
1273 the read pointer
1274 */
1275 do
1276 {
1277 ssize_t offset = ReadBlobMSBSignedLong(image);
1278 if (offset == 0)
1279 foundAllLayers=MagickTrue;
1280 else
1281 number_layers++;
1282 if (EOFBlob(image) != MagickFalse)
1283 {
1284 ThrowFileException(exception,CorruptImageError,
1285 "UnexpectedEndOfFile",image->filename);
1286 break;
1287 }
1288 } while (foundAllLayers == MagickFalse);
1289 doc_info.number_layers=number_layers;
1290 offset=SeekBlob(image,oldPos,SEEK_SET); /* restore the position! */
1291 if (offset < 0)
1292 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1293 /* allocate our array of layer info blocks */
1294 length=(size_t) number_layers;
1295 layer_info=(XCFLayerInfo *) AcquireQuantumMemory(length,
1296 sizeof(*layer_info));
1297 if (layer_info == (XCFLayerInfo *) NULL)
1298 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1299 (void) ResetMagickMemory(layer_info,0,number_layers*sizeof(XCFLayerInfo));
1300 for ( ; ; )
1301 {
1302 MagickBooleanType
1303 layer_ok;
1304
1305 MagickOffsetType
1306 offset,
1307 saved_pos;
1308
1309 /* read in the offset of the next layer */
1310 offset=(MagickOffsetType) ReadBlobMSBLong(image);
1311 /* if the offset is 0 then we are at the end
1312 * of the layer list.
1313 */
1314 if (offset == 0)
1315 break;
1316 /* save the current position as it is where the
1317 * next layer offset is stored.
1318 */
1319 saved_pos=TellBlob(image);
1320 /* seek to the layer offset */
1321 offset=SeekBlob(image,offset,SEEK_SET);
1322 /* read in the layer */
1323 layer_ok=ReadOneLayer(image_info,image,&doc_info,
1324 &layer_info[current_layer],current_layer,exception);
1325 if (layer_ok == MagickFalse)
1326 {
1327 int j;
1328
1329 for (j=0; j < current_layer; j++)
1330 layer_info[j].image=DestroyImage(layer_info[j].image);
1331 layer_info=(XCFLayerInfo *) RelinquishMagickMemory(layer_info);
1332 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1333 }
1334 /* restore the saved position so we'll be ready to
1335 * read the next offset.
1336 */
1337 offset=SeekBlob(image, saved_pos, SEEK_SET);
1338 current_layer++;
1339 }
1340 #if 0
1341 {
1342 /* NOTE: XCF layers are REVERSED from composite order! */
1343 signed int j;
1344 for (j=number_layers-1; j>=0; j--) {
1345 /* BOGUS: need to consider layer blending modes!! */
1346
1347 if ( layer_info[j].visible ) { /* only visible ones, please! */
1348 CompositeImage(image, OverCompositeOp, layer_info[j].image,
1349 layer_info[j].offset_x, layer_info[j].offset_y );
1350 layer_info[j].image =DestroyImage( layer_info[j].image );
1351
1352 /* If we do this, we'll get REAL gray images! */
1353 if ( image_type == GIMP_GRAY ) {
1354 QuantizeInfo qi;
1355 GetQuantizeInfo(&qi);
1356 qi.colorspace = GRAYColorspace;
1357 QuantizeImage( &qi, layer_info[j].image );
1358 }
1359 }
1360 }
1361 }
1362 #else
1363 {
1364 /* NOTE: XCF layers are REVERSED from composite order! */
1365 ssize_t j;
1366
1367 /* now reverse the order of the layers as they are put
1368 into subimages
1369 */
1370 for (j=(ssize_t) number_layers-1; j >= 0; j--)
1371 AppendImageToList(&image,layer_info[j].image);
1372 }
1373 #endif
1374
1375 layer_info=(XCFLayerInfo *) RelinquishMagickMemory(layer_info);
1376
1377 #if 0 /* BOGUS: do we need the channels?? */
1378 while (MagickTrue)
1379 {
1380 /* read in the offset of the next channel */
1381 info->cp += xcf_read_int32 (info->fp, &offset, 1);
1382
1383 /* if the offset is 0 then we are at the end
1384 * of the channel list.
1385 */
1386 if (offset == 0)
1387 break;
1388
1389 /* save the current position as it is where the
1390 * next channel offset is stored.
1391 */
1392 saved_pos = info->cp;
1393
1394 /* seek to the channel offset */
1395 xcf_seek_pos (info, offset);
1396
1397 /* read in the layer */
1398 channel = xcf_load_channel (info, gimage);
1399 if (channel == 0)
1400 goto error;
1401
1402 num_successful_elements++;
1403
1404 /* add the channel to the image if its not the selection */
1405 if (channel != gimage->selection_mask)
1406 gimp_image_add_channel (gimage, channel, -1);
1407
1408 /* restore the saved position so we'll be ready to
1409 * read the next offset.
1410 */
1411 xcf_seek_pos (info, saved_pos);
1412 }
1413 #endif
1414 }
1415
1416 (void) CloseBlob(image);
1417 DestroyImage(RemoveFirstImageFromList(&image));
1418 if (image_type == GIMP_GRAY)
1419 image->type=GrayscaleType;
1420 return(GetFirstImageInList(image));
1421 }
1422
1423 /*
1424 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1425 % %
1426 % %
1427 % %
1428 % R e g i s t e r X C F I m a g e %
1429 % %
1430 % %
1431 % %
1432 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1433 %
1434 % RegisterXCFImage() adds attributes for the XCF image format to
1435 % the list of supported formats. The attributes include the image format
1436 % tag, a method to read and/or write the format, whether the format
1437 % supports the saving of more than one frame to the same file or blob,
1438 % whether the format supports native in-memory I/O, and a brief
1439 % description of the format.
1440 %
1441 % The format of the RegisterXCFImage method is:
1442 %
1443 % size_t RegisterXCFImage(void)
1444 %
1445 */
RegisterXCFImage(void)1446 ModuleExport size_t RegisterXCFImage(void)
1447 {
1448 MagickInfo
1449 *entry;
1450
1451 entry=AcquireMagickInfo("XCF","XCF","GIMP image");
1452 entry->decoder=(DecodeImageHandler *) ReadXCFImage;
1453 entry->magick=(IsImageFormatHandler *) IsXCF;
1454 entry->flags|=CoderSeekableStreamFlag;
1455 (void) RegisterMagickInfo(entry);
1456 return(MagickImageCoderSignature);
1457 }
1458
1459 /*
1460 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1461 % %
1462 % %
1463 % %
1464 % U n r e g i s t e r X C F I m a g e %
1465 % %
1466 % %
1467 % %
1468 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1469 %
1470 % UnregisterXCFImage() removes format registrations made by the
1471 % XCF module from the list of supported formats.
1472 %
1473 % The format of the UnregisterXCFImage method is:
1474 %
1475 % UnregisterXCFImage(void)
1476 %
1477 */
UnregisterXCFImage(void)1478 ModuleExport void UnregisterXCFImage(void)
1479 {
1480 (void) UnregisterMagickInfo("XCF");
1481 }
1482