blob: 3d31beeba0167bd3521e136bee2e021f4a381a16 [file] [log] [blame]
cristy3ed852e2009-09-05 21:47:34 +00001/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3% %
4% %
5% %
6% TTTTT GGGG AAA %
7% T G A A %
8% T G GG AAAAA %
9% T G G A A %
10% T GGG A A %
11% %
12% %
13% Read/Write Truevision Targa Image Format %
14% %
15% Software Design %
16% John Cristy %
17% July 1992 %
18% %
19% %
cristy16af1cb2009-12-11 21:38:29 +000020% Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization %
cristy3ed852e2009-09-05 21:47:34 +000021% 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 "magick/studio.h"
43#include "magick/blob.h"
44#include "magick/blob-private.h"
45#include "magick/cache.h"
46#include "magick/color-private.h"
cristye7e40552010-04-24 21:34:22 +000047#include "magick/colormap.h"
cristy316d5172009-09-17 19:31:25 +000048#include "magick/colormap-private.h"
cristy3ed852e2009-09-05 21:47:34 +000049#include "magick/colorspace.h"
50#include "magick/exception.h"
51#include "magick/exception-private.h"
52#include "magick/image.h"
53#include "magick/image-private.h"
54#include "magick/list.h"
55#include "magick/magick.h"
56#include "magick/memory_.h"
57#include "magick/monitor.h"
58#include "magick/monitor-private.h"
59#include "magick/property.h"
60#include "magick/quantum-private.h"
61#include "magick/static.h"
62#include "magick/string_.h"
63#include "magick/module.h"
64
65/*
66 Forward declarations.
67*/
68static MagickBooleanType
69 WriteTGAImage(const ImageInfo *,Image *);
70
71/*
72%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
73% %
74% %
75% %
76% R e a d T G A I m a g e %
77% %
78% %
79% %
80%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
81%
82% ReadTGAImage() reads a Truevision TGA image file and returns it.
83% It allocates the memory necessary for the new Image structure and returns
84% a pointer to the new image.
85%
86% The format of the ReadTGAImage method is:
87%
88% Image *ReadTGAImage(const ImageInfo *image_info,ExceptionInfo *exception)
89%
90% A description of each parameter follows:
91%
92% o image_info: the image info.
93%
94% o exception: return any errors or warnings in this structure.
95%
96*/
97static Image *ReadTGAImage(const ImageInfo *image_info,ExceptionInfo *exception)
98{
99#define TGAColormap 1
100#define TGARGB 2
101#define TGAMonochrome 3
102#define TGARLEColormap 9
103#define TGARLERGB 10
104#define TGARLEMonochrome 11
105
106 typedef struct _TGAInfo
107 {
108 unsigned char
109 id_length,
110 colormap_type,
111 image_type;
112
113 unsigned short
114 colormap_index,
115 colormap_length;
116
117 unsigned char
118 colormap_size;
119
120 unsigned short
121 x_origin,
122 y_origin,
123 width,
124 height;
125
126 unsigned char
127 bits_per_pixel,
128 attributes;
129 } TGAInfo;
130
131 Image
132 *image;
133
134 IndexPacket
135 index;
136
cristybb503372010-05-27 20:51:26 +0000137 ssize_t
cristy3ed852e2009-09-05 21:47:34 +0000138 y;
139
140 MagickBooleanType
141 status;
142
143 PixelPacket
144 pixel;
145
146 register IndexPacket
147 *indexes;
148
cristybb503372010-05-27 20:51:26 +0000149 register ssize_t
cristy3ed852e2009-09-05 21:47:34 +0000150 i,
151 x;
152
153 register PixelPacket
154 *q;
155
156 ssize_t
157 count;
158
159 TGAInfo
160 tga_info;
161
162 unsigned char
163 j,
164 k,
165 runlength;
166
cristybb503372010-05-27 20:51:26 +0000167 size_t
cristy3ed852e2009-09-05 21:47:34 +0000168 base,
169 flag,
170 offset,
171 real,
172 skip;
173
174 /*
175 Open image file.
176 */
177 assert(image_info != (const ImageInfo *) NULL);
178 assert(image_info->signature == MagickSignature);
179 if (image_info->debug != MagickFalse)
180 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
181 image_info->filename);
182 assert(exception != (ExceptionInfo *) NULL);
183 assert(exception->signature == MagickSignature);
184 image=AcquireImage(image_info);
185 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
186 if (status == MagickFalse)
187 {
188 image=DestroyImageList(image);
189 return((Image *) NULL);
190 }
191 /*
192 Read TGA header information.
193 */
194 count=ReadBlob(image,1,&tga_info.id_length);
195 tga_info.colormap_type=(unsigned char) ReadBlobByte(image);
196 tga_info.image_type=(unsigned char) ReadBlobByte(image);
197 do
198 {
199 if ((count != 1) ||
200 ((tga_info.image_type != TGAColormap) &&
201 (tga_info.image_type != TGARGB) &&
202 (tga_info.image_type != TGAMonochrome) &&
203 (tga_info.image_type != TGARLEColormap) &&
204 (tga_info.image_type != TGARLERGB) &&
205 (tga_info.image_type != TGARLEMonochrome)) ||
206 (((tga_info.image_type == TGAColormap) ||
207 (tga_info.image_type == TGARLEColormap)) &&
208 (tga_info.colormap_type == 0)))
209 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
210 tga_info.colormap_index=ReadBlobLSBShort(image);
211 tga_info.colormap_length=ReadBlobLSBShort(image);
212 tga_info.colormap_size=(unsigned char) ReadBlobByte(image);
213 tga_info.x_origin=ReadBlobLSBShort(image);
214 tga_info.y_origin=ReadBlobLSBShort(image);
215 tga_info.width=(unsigned short) ReadBlobLSBShort(image);
216 tga_info.height=(unsigned short) ReadBlobLSBShort(image);
217 tga_info.bits_per_pixel=(unsigned char) ReadBlobByte(image);
218 tga_info.attributes=(unsigned char) ReadBlobByte(image);
219 if (EOFBlob(image) != MagickFalse)
220 ThrowReaderException(CorruptImageError,"UnableToReadImageData");
221 /*
222 Initialize image structure.
223 */
224 image->columns=tga_info.width;
225 image->rows=tga_info.height;
226 image->matte=tga_info.bits_per_pixel == 32 ? MagickTrue : MagickFalse;
227 if ((tga_info.image_type != TGAColormap) &&
228 (tga_info.image_type != TGARLEColormap))
cristybb503372010-05-27 20:51:26 +0000229 image->depth=(size_t) ((tga_info.bits_per_pixel <= 8) ? 8 :
cristy3ed852e2009-09-05 21:47:34 +0000230 (tga_info.bits_per_pixel <= 16) ? 5 :
231 (tga_info.bits_per_pixel == 24) ? 8 :
232 (tga_info.bits_per_pixel == 32) ? 8 : 8);
233 else
cristybb503372010-05-27 20:51:26 +0000234 image->depth=(size_t) ((tga_info.colormap_size <= 8) ? 8 :
cristy3ed852e2009-09-05 21:47:34 +0000235 (tga_info.colormap_size <= 16) ? 5 :
236 (tga_info.colormap_size == 24) ? 8 :
237 (tga_info.colormap_size == 32) ? 8 : 8);
238 if ((tga_info.image_type == TGAColormap) ||
239 (tga_info.image_type == TGAMonochrome) ||
240 (tga_info.image_type == TGARLEColormap) ||
241 (tga_info.image_type == TGARLEMonochrome))
242 image->storage_class=PseudoClass;
243 image->compression=NoCompression;
244 if ((tga_info.image_type == TGARLEColormap) ||
245 (tga_info.image_type == TGARLEMonochrome))
246 image->compression=RLECompression;
247 if (image->storage_class == PseudoClass)
248 {
249 if (tga_info.colormap_type != 0)
250 image->colors=tga_info.colormap_length;
251 else
252 {
cristyf9cca6a2010-06-04 23:49:28 +0000253 size_t
254 one;
255
256 one=1;
257 image->colors=one << tga_info.bits_per_pixel;
cristy3ed852e2009-09-05 21:47:34 +0000258 if (AcquireImageColormap(image,image->colors) == MagickFalse)
259 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
260 }
261 }
262 if (tga_info.id_length != 0)
263 {
264 char
265 *comment;
266
267 size_t
268 length;
269
270 /*
271 TGA image comment.
272 */
273 length=(size_t) tga_info.id_length;
274 comment=(char *) NULL;
275 if (~length >= MaxTextExtent)
276 comment=(char *) AcquireQuantumMemory(length+MaxTextExtent,
277 sizeof(*comment));
278 if (comment == (char *) NULL)
279 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
280 count=ReadBlob(image,tga_info.id_length,(unsigned char *) comment);
281 comment[tga_info.id_length]='\0';
282 (void) SetImageProperty(image,"comment",comment);
283 comment=DestroyString(comment);
284 }
285 (void) ResetMagickMemory(&pixel,0,sizeof(pixel));
286 pixel.opacity=(Quantum) OpaqueOpacity;
287 if (tga_info.colormap_type != 0)
288 {
289 /*
290 Read TGA raster colormap.
291 */
292 if (AcquireImageColormap(image,image->colors) == MagickFalse)
293 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
cristybb503372010-05-27 20:51:26 +0000294 for (i=0; i < (ssize_t) image->colors; i++)
cristy3ed852e2009-09-05 21:47:34 +0000295 {
296 switch (tga_info.colormap_size)
297 {
298 case 8:
299 default:
300 {
301 /*
302 Gray scale.
303 */
304 pixel.red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
305 pixel.green=pixel.red;
306 pixel.blue=pixel.red;
307 break;
308 }
309 case 15:
310 case 16:
311 {
312 QuantumAny
313 range;
314
315 /*
316 5 bits each of red green and blue.
317 */
318 j=(unsigned char) ReadBlobByte(image);
319 k=(unsigned char) ReadBlobByte(image);
320 range=GetQuantumRange(5UL);
321 pixel.red=ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2,range);
322 pixel.green=ScaleAnyToQuantum((1UL*(k & 0x03) << 3)+
323 (1UL*(j & 0xe0) >> 5),range);
324 pixel.blue=ScaleAnyToQuantum(1UL*(j & 0x1f),range);
325 break;
326 }
327 case 24:
328 case 32:
329 {
330 /*
331 8 bits each of blue, green and red.
332 */
333 pixel.blue=ScaleCharToQuantum((unsigned char)
334 ReadBlobByte(image));
335 pixel.green=ScaleCharToQuantum((unsigned char)
336 ReadBlobByte(image));
337 pixel.red=ScaleCharToQuantum((unsigned char)
338 ReadBlobByte(image));
339 break;
340 }
341 }
342 image->colormap[i]=pixel;
343 }
344 }
345 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
346 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
347 break;
348 /*
349 Convert TGA pixels to pixel packets.
350 */
351 base=0;
352 flag=0;
353 skip=MagickFalse;
354 real=0;
355 index=(IndexPacket) 0;
356 runlength=0;
357 offset=0;
cristybb503372010-05-27 20:51:26 +0000358 for (y=0; y < (ssize_t) image->rows; y++)
cristy3ed852e2009-09-05 21:47:34 +0000359 {
360 real=offset;
361 if (((unsigned char) (tga_info.attributes & 0x20) >> 5) == 0)
362 real=image->rows-real-1;
cristybb503372010-05-27 20:51:26 +0000363 q=QueueAuthenticPixels(image,0,(ssize_t) real,image->columns,1,exception);
cristy3ed852e2009-09-05 21:47:34 +0000364 if (q == (PixelPacket *) NULL)
365 break;
366 indexes=GetAuthenticIndexQueue(image);
cristybb503372010-05-27 20:51:26 +0000367 for (x=0; x < (ssize_t) image->columns; x++)
cristy3ed852e2009-09-05 21:47:34 +0000368 {
369 if ((tga_info.image_type == TGARLEColormap) ||
370 (tga_info.image_type == TGARLERGB) ||
371 (tga_info.image_type == TGARLEMonochrome))
372 {
373 if (runlength != 0)
374 {
375 runlength--;
376 skip=flag != 0;
377 }
378 else
379 {
380 count=ReadBlob(image,1,&runlength);
381 if (count == 0)
382 ThrowReaderException(CorruptImageError,
383 "UnableToReadImageData");
384 flag=runlength & 0x80;
385 if (flag != 0)
386 runlength-=128;
387 skip=MagickFalse;
388 }
389 }
390 if (skip == MagickFalse)
391 switch (tga_info.bits_per_pixel)
392 {
393 case 8:
394 default:
395 {
396 /*
397 Gray scale.
398 */
399 index=(IndexPacket) ReadBlobByte(image);
400 if (tga_info.colormap_type != 0)
cristybb503372010-05-27 20:51:26 +0000401 pixel=image->colormap[(ssize_t) ConstrainColormapIndex(image,
cristy3ed852e2009-09-05 21:47:34 +0000402 1UL*index)];
403 else
404 {
405 pixel.red=ScaleCharToQuantum((unsigned char) index);
406 pixel.green=ScaleCharToQuantum((unsigned char) index);
407 pixel.blue=ScaleCharToQuantum((unsigned char) index);
408 }
409 break;
410 }
411 case 15:
412 case 16:
413 {
414 QuantumAny
415 range;
416
417 /*
418 5 bits each of red green and blue.
419 */
420 j=(unsigned char) ReadBlobByte(image);
421 k=(unsigned char) ReadBlobByte(image);
422 range=GetQuantumRange(5UL);
423 pixel.red=ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2,range);
424 pixel.green=ScaleAnyToQuantum((1UL*(k & 0x03) << 3)+
425 (1UL*(j & 0xe0) >> 5),range);
426 pixel.blue=ScaleAnyToQuantum(1UL*(j & 0x1f),range);
427 if (image->matte != MagickFalse)
428 pixel.opacity=(k & 0x80) != 0 ? (Quantum) OpaqueOpacity :
429 (Quantum) TransparentOpacity;
430 if (image->storage_class == PseudoClass)
cristybb503372010-05-27 20:51:26 +0000431 index=ConstrainColormapIndex(image,((size_t) k << 8)+j);
cristy3ed852e2009-09-05 21:47:34 +0000432 break;
433 }
434 case 24:
435 case 32:
436 {
437 /*
438 8 bits each of blue green and red.
439 */
440 pixel.blue=ScaleCharToQuantum((unsigned char)
441 ReadBlobByte(image));
442 pixel.green=ScaleCharToQuantum((unsigned char)
443 ReadBlobByte(image));
444 pixel.red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
445 if (tga_info.bits_per_pixel == 32)
446 pixel.opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(
447 (unsigned char) ReadBlobByte(image)));
448 break;
449 }
450 }
451 if (status == MagickFalse)
452 ThrowReaderException(CorruptImageError,"UnableToReadImageData");
453 if (image->storage_class == PseudoClass)
454 indexes[x]=index;
455 q->red=pixel.red;
456 q->green=pixel.green;
457 q->blue=pixel.blue;
458 if (image->matte != MagickFalse)
459 q->opacity=pixel.opacity;
460 q++;
461 }
462 if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 4)
463 offset+=4;
464 else
465 if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 2)
466 offset+=2;
467 else
468 offset++;
469 if (offset >= image->rows)
470 {
471 base++;
472 offset=base;
473 }
474 if (SyncAuthenticPixels(image,exception) == MagickFalse)
475 break;
476 if (image->previous == (Image *) NULL)
477 {
cristycee97112010-05-28 00:44:52 +0000478 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
479 image->rows);
cristy3ed852e2009-09-05 21:47:34 +0000480 if (status == MagickFalse)
481 break;
482 }
483 }
484 if (EOFBlob(image) != MagickFalse)
485 {
486 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
487 image->filename);
488 break;
489 }
490 /*
491 Proceed to next image.
492 */
493 if (image_info->number_scenes != 0)
494 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
495 break;
496 count=ReadBlob(image,1,&tga_info.id_length);
497 tga_info.colormap_type=(unsigned char) ReadBlobByte(image);
498 tga_info.image_type=(unsigned char) ReadBlobByte(image);
499 status=((tga_info.image_type == TGAColormap) ||
500 (tga_info.image_type == TGARGB) ||
501 (tga_info.image_type == TGAMonochrome) ||
502 (tga_info.image_type == TGARLEColormap) ||
503 (tga_info.image_type == TGARLERGB) ||
504 (tga_info.image_type == TGARLEMonochrome)) ? MagickTrue : MagickFalse;
505 if (status == MagickTrue)
506 {
507 /*
508 Allocate next image structure.
509 */
510 AcquireNextImage(image_info,image);
511 if (GetNextImageInList(image) == (Image *) NULL)
512 {
513 image=DestroyImageList(image);
514 return((Image *) NULL);
515 }
516 image=SyncNextImageInList(image);
517 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
518 GetBlobSize(image));
519 if (status == MagickFalse)
520 break;
521 }
522 } while (status == MagickTrue);
523 (void) CloseBlob(image);
524 return(GetFirstImageInList(image));
525}
526
527/*
528%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
529% %
530% %
531% %
532% R e g i s t e r T G A I m a g e %
533% %
534% %
535% %
536%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
537%
538% RegisterTGAImage() adds properties for the TGA image format to
539% the list of supported formats. The properties include the image format
540% tag, a method to read and/or write the format, whether the format
541% supports the saving of more than one frame to the same file or blob,
542% whether the format supports native in-memory I/O, and a brief
543% description of the format.
544%
545% The format of the RegisterTGAImage method is:
546%
cristybb503372010-05-27 20:51:26 +0000547% size_t RegisterTGAImage(void)
cristy3ed852e2009-09-05 21:47:34 +0000548%
549*/
cristybb503372010-05-27 20:51:26 +0000550ModuleExport size_t RegisterTGAImage(void)
cristy3ed852e2009-09-05 21:47:34 +0000551{
552 MagickInfo
553 *entry;
554
555 entry=SetMagickInfo("ICB");
556 entry->decoder=(DecodeImageHandler *) ReadTGAImage;
557 entry->encoder=(EncodeImageHandler *) WriteTGAImage;
558 entry->description=ConstantString("Truevision Targa image");
559 entry->module=ConstantString("TGA");
560 (void) RegisterMagickInfo(entry);
561 entry=SetMagickInfo("TGA");
562 entry->decoder=(DecodeImageHandler *) ReadTGAImage;
563 entry->encoder=(EncodeImageHandler *) WriteTGAImage;
564 entry->description=ConstantString("Truevision Targa image");
565 entry->module=ConstantString("TGA");
566 (void) RegisterMagickInfo(entry);
567 entry=SetMagickInfo("VDA");
568 entry->decoder=(DecodeImageHandler *) ReadTGAImage;
569 entry->encoder=(EncodeImageHandler *) WriteTGAImage;
570 entry->description=ConstantString("Truevision Targa image");
571 entry->module=ConstantString("TGA");
572 (void) RegisterMagickInfo(entry);
573 entry=SetMagickInfo("VST");
574 entry->decoder=(DecodeImageHandler *) ReadTGAImage;
575 entry->encoder=(EncodeImageHandler *) WriteTGAImage;
576 entry->description=ConstantString("Truevision Targa image");
577 entry->module=ConstantString("TGA");
578 (void) RegisterMagickInfo(entry);
579 return(MagickImageCoderSignature);
580}
581
582/*
583%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
584% %
585% %
586% %
587% U n r e g i s t e r T G A I m a g e %
588% %
589% %
590% %
591%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
592%
593% UnregisterTGAImage() removes format registrations made by the
594% TGA module from the list of supported formats.
595%
596% The format of the UnregisterTGAImage method is:
597%
598% UnregisterTGAImage(void)
599%
600*/
601ModuleExport void UnregisterTGAImage(void)
602{
603 (void) UnregisterMagickInfo("ICB");
604 (void) UnregisterMagickInfo("TGA");
605 (void) UnregisterMagickInfo("VDA");
606 (void) UnregisterMagickInfo("VST");
607}
608
609/*
610%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
611% %
612% %
613% %
614% W r i t e T G A I m a g e %
615% %
616% %
617% %
618%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
619%
620% WriteTGAImage() writes a image in the Truevision Targa rasterfile
621% format.
622%
623% The format of the WriteTGAImage method is:
624%
625% MagickBooleanType WriteTGAImage(const ImageInfo *image_info,Image *image)
626%
627% A description of each parameter follows.
628%
629% o image_info: the image info.
630%
631% o image: The image.
632%
633*/
634
635static inline size_t MagickMin(const size_t x,const size_t y)
636{
637 if (x < y)
638 return(x);
639 return(y);
640}
641
642static MagickBooleanType WriteTGAImage(const ImageInfo *image_info,Image *image)
643{
644#define TargaColormap 1
645#define TargaRGB 2
646#define TargaMonochrome 3
647#define TargaRLEColormap 9
648#define TargaRLERGB 10
649#define TargaRLEMonochrome 11
650
651 typedef struct _TargaInfo
652 {
653 unsigned char
654 id_length,
655 colormap_type,
656 image_type;
657
658 unsigned short
659 colormap_index,
660 colormap_length;
661
662 unsigned char
663 colormap_size;
664
665 unsigned short
666 x_origin,
667 y_origin,
668 width,
669 height;
670
671 unsigned char
672 bits_per_pixel,
673 attributes;
674 } TargaInfo;
675
676 const char
677 *value;
678
cristybb503372010-05-27 20:51:26 +0000679 ssize_t
cristy3ed852e2009-09-05 21:47:34 +0000680 y;
681
682 MagickBooleanType
683 status;
684
685 MagickOffsetType
686 scene;
687
688 register const IndexPacket
689 *indexes;
690
691 register const PixelPacket
692 *p;
693
cristybb503372010-05-27 20:51:26 +0000694 register ssize_t
cristy3ed852e2009-09-05 21:47:34 +0000695 x;
696
cristybb503372010-05-27 20:51:26 +0000697 register ssize_t
cristy3ed852e2009-09-05 21:47:34 +0000698 i;
699
700 register unsigned char
701 *q;
702
703 ssize_t
704 count;
705
706 TargaInfo
707 targa_info;
708
709 unsigned char
710 *targa_pixels;
711
712 /*
713 Open output image file.
714 */
715 assert(image_info != (const ImageInfo *) NULL);
716 assert(image_info->signature == MagickSignature);
717 assert(image != (Image *) NULL);
718 assert(image->signature == MagickSignature);
719 if (image->debug != MagickFalse)
720 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
721 status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
722 if (status == MagickFalse)
723 return(status);
724 scene=0;
725 do
726 {
727 /*
728 Initialize TGA raster file header.
729 */
730 if ((image->columns > 65535L) || (image->rows > 65535L))
731 ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
732 if (image->colorspace != RGBColorspace)
733 (void) TransformImageColorspace(image,RGBColorspace);
734 targa_info.id_length=0;
735 value=GetImageProperty(image,"comment");
736 if (value != (const char *) NULL)
737 targa_info.id_length=(unsigned char) MagickMin(strlen(value),255);
738 targa_info.colormap_type=0;
739 targa_info.colormap_index=0;
740 targa_info.colormap_length=0;
741 targa_info.colormap_size=0;
742 targa_info.x_origin=0;
743 targa_info.y_origin=0;
744 targa_info.width=(unsigned short) image->columns;
745 targa_info.height=(unsigned short) image->rows;
746 targa_info.bits_per_pixel=8;
747 targa_info.attributes=0;
748 if ((image_info->type != TrueColorType) &&
749 (image_info->type != TrueColorMatteType) &&
750 (image_info->type != PaletteType) &&
751 (image->matte == MagickFalse) &&
752 (IsGrayImage(image,&image->exception) != MagickFalse))
753 targa_info.image_type=TargaMonochrome;
754 else
755 if ((image->storage_class == DirectClass) || (image->colors > 256))
756 {
757 /*
758 Full color TGA raster.
759 */
760 targa_info.image_type=TargaRGB;
761 targa_info.bits_per_pixel=24;
762 if (image->matte != MagickFalse)
763 {
764 targa_info.bits_per_pixel=32;
765 targa_info.attributes=8; /* # of alpha bits */
766 }
767 }
768 else
769 {
770 /*
771 Colormapped TGA raster.
772 */
773 targa_info.image_type=TargaColormap;
774 targa_info.colormap_type=1;
775 targa_info.colormap_length=(unsigned short) image->colors;
776 targa_info.colormap_size=24;
777 }
778 /*
779 Write TGA header.
780 */
781 (void) WriteBlobByte(image,targa_info.id_length);
782 (void) WriteBlobByte(image,targa_info.colormap_type);
783 (void) WriteBlobByte(image,targa_info.image_type);
784 (void) WriteBlobLSBShort(image,targa_info.colormap_index);
785 (void) WriteBlobLSBShort(image,targa_info.colormap_length);
786 (void) WriteBlobByte(image,targa_info.colormap_size);
787 (void) WriteBlobLSBShort(image,targa_info.x_origin);
788 (void) WriteBlobLSBShort(image,targa_info.y_origin);
789 (void) WriteBlobLSBShort(image,targa_info.width);
790 (void) WriteBlobLSBShort(image,targa_info.height);
791 (void) WriteBlobByte(image,targa_info.bits_per_pixel);
792 (void) WriteBlobByte(image,targa_info.attributes);
793 if (targa_info.id_length != 0)
794 (void) WriteBlob(image,targa_info.id_length,(unsigned char *)
795 value);
796 if (targa_info.image_type == TargaColormap)
797 {
798 unsigned char
799 *targa_colormap;
800
801 /*
802 Dump colormap to file (blue, green, red byte order).
803 */
804 targa_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
805 targa_info.colormap_length,3UL*sizeof(*targa_colormap));
806 if (targa_colormap == (unsigned char *) NULL)
807 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
808 q=targa_colormap;
cristybb503372010-05-27 20:51:26 +0000809 for (i=0; i < (ssize_t) image->colors; i++)
cristy3ed852e2009-09-05 21:47:34 +0000810 {
811 *q++=ScaleQuantumToChar(image->colormap[i].blue);
812 *q++=ScaleQuantumToChar(image->colormap[i].green);
813 *q++=ScaleQuantumToChar(image->colormap[i].red);
814 }
815 (void) WriteBlob(image,(size_t) (3*targa_info.colormap_length),
816 targa_colormap);
817 targa_colormap=(unsigned char *) RelinquishMagickMemory(targa_colormap);
818 }
819 /*
820 Convert MIFF to TGA raster pixels.
821 */
822 count=(ssize_t) (targa_info.bits_per_pixel*targa_info.width)/8;
823 targa_pixels=(unsigned char *) AcquireQuantumMemory((size_t) count,
824 sizeof(*targa_pixels));
825 if (targa_pixels == (unsigned char *) NULL)
826 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
cristybb503372010-05-27 20:51:26 +0000827 for (y=(ssize_t) (image->rows-1); y >= 0; y--)
cristy3ed852e2009-09-05 21:47:34 +0000828 {
829 p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
830 if (p == (const PixelPacket *) NULL)
831 break;
832 q=targa_pixels;
833 indexes=GetVirtualIndexQueue(image);
cristybb503372010-05-27 20:51:26 +0000834 for (x=0; x < (ssize_t) image->columns; x++)
cristy3ed852e2009-09-05 21:47:34 +0000835 {
836 if (targa_info.image_type == TargaColormap)
837 *q++=(unsigned char) indexes[x];
838 else
839 if (targa_info.image_type == TargaMonochrome)
840 *q++=(unsigned char) ScaleQuantumToChar(PixelIntensityToQuantum(p));
841 else
842 {
cristyce70c172010-01-07 17:15:30 +0000843 *q++=ScaleQuantumToChar(GetBluePixelComponent(p));
844 *q++=ScaleQuantumToChar(GetGreenPixelComponent(p));
845 *q++=ScaleQuantumToChar(GetRedPixelComponent(p));
cristy3ed852e2009-09-05 21:47:34 +0000846 if (image->matte != MagickFalse)
847 *q++=(unsigned char) ScaleQuantumToChar((Quantum)
cristy46f08202010-01-10 04:04:21 +0000848 (GetAlphaPixelComponent(p)));
cristy3ed852e2009-09-05 21:47:34 +0000849 if (image->colorspace == CMYKColorspace)
850 *q++=ScaleQuantumToChar(indexes[x]);
851 }
852 p++;
853 }
854 (void) WriteBlob(image,(size_t) (q-targa_pixels),targa_pixels);
855 if (image->previous == (Image *) NULL)
856 {
cristycee97112010-05-28 00:44:52 +0000857 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
858 image->rows);
cristy3ed852e2009-09-05 21:47:34 +0000859 if (status == MagickFalse)
860 break;
861 }
862 }
863 targa_pixels=(unsigned char *) RelinquishMagickMemory(targa_pixels);
864 if (GetNextImageInList(image) == (Image *) NULL)
865 break;
866 image=SyncNextImageInList(image);
867 status=SetImageProgress(image,SaveImagesTag,scene++,
868 GetImageListLength(image));
869 if (status == MagickFalse)
870 break;
871 } while (image_info->adjoin != MagickFalse);
872 (void) CloseBlob(image);
873 return(MagickTrue);
874}