1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % RRRR L AAA %
7 % R R L A A %
8 % RRRR L AAAAA %
9 % R R L A A %
10 % R R LLLLL A A %
11 % %
12 % %
13 % Read Alias/Wavefront Image Format %
14 % %
15 % Software Design %
16 % Cristy %
17 % July 1992 %
18 % %
19 % %
20 % Copyright 1999-2019 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 % https://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/property.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/cache.h"
47 #include "MagickCore/exception.h"
48 #include "MagickCore/exception-private.h"
49 #include "MagickCore/image.h"
50 #include "MagickCore/image-private.h"
51 #include "MagickCore/list.h"
52 #include "MagickCore/magick.h"
53 #include "MagickCore/memory_.h"
54 #include "MagickCore/monitor.h"
55 #include "MagickCore/monitor-private.h"
56 #include "MagickCore/pixel-accessor.h"
57 #include "MagickCore/quantum-private.h"
58 #include "MagickCore/static.h"
59 #include "MagickCore/string_.h"
60 #include "MagickCore/module.h"
61
62 /*
63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
64 % %
65 % %
66 % %
67 % R e a d R L A I m a g e %
68 % %
69 % %
70 % %
71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72 %
73 % ReadRLAImage() reads a run-length encoded Wavefront RLA image file
74 % and returns it. It allocates the memory necessary for the new Image
75 % structure and returns a pointer to the new image.
76 %
77 % Note: This module was contributed by Lester Vecsey (master@internexus.net).
78 %
79 % The format of the ReadRLAImage method is:
80 %
81 % Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
82 %
83 % A description of each parameter follows:
84 %
85 % o image_info: the image info.
86 %
87 % o exception: return any errors or warnings in this structure.
88 %
89 */
ReadRLAImage(const ImageInfo * image_info,ExceptionInfo * exception)90 static Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
91 {
92 typedef struct _WindowFrame
93 {
94 short
95 left,
96 right,
97 bottom,
98 top;
99 } WindowFrame;
100
101 typedef struct _RLAInfo
102 {
103 WindowFrame
104 window,
105 active_window;
106
107 short
108 frame,
109 storage_type,
110 number_channels,
111 number_matte_channels,
112 number_auxiliary_channels,
113 revision;
114
115 char
116 gamma[16+1],
117 red_primary[24+1],
118 green_primary[24+1],
119 blue_primary[24+1],
120 white_point[24+1];
121
122 int
123 job_number;
124
125 char
126 name[128+1],
127 description[128+1],
128 program[64+1],
129 machine[32+1],
130 user[32+1],
131 date[20+1],
132 aspect[24+1],
133 aspect_ratio[8+1],
134 chan[32+1];
135
136 short
137 field;
138
139 char
140 time[12],
141 filter[32];
142
143 short
144 bits_per_channel,
145 matte_type,
146 matte_bits,
147 auxiliary_type,
148 auxiliary_bits;
149
150 char
151 auxiliary[32+1],
152 space[36+1];
153
154 int
155 next;
156 } RLAInfo;
157
158 Image
159 *image;
160
161 int
162 channel,
163 length,
164 runlength;
165
166 MagickBooleanType
167 status;
168
169 MagickOffsetType
170 offset,
171 *scanlines;
172
173 register ssize_t
174 i,
175 x;
176
177 register Quantum
178 *q;
179
180 ssize_t
181 count,
182 y;
183
184 RLAInfo
185 rla_info;
186
187 unsigned char
188 byte;
189
190 /*
191 Open image file.
192 */
193 assert(image_info != (const ImageInfo *) NULL);
194 assert(image_info->signature == MagickCoreSignature);
195 if (image_info->debug != MagickFalse)
196 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
197 image_info->filename);
198 assert(exception != (ExceptionInfo *) NULL);
199 assert(exception->signature == MagickCoreSignature);
200 image=AcquireImage(image_info,exception);
201 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
202 if (status == MagickFalse)
203 {
204 image=DestroyImageList(image);
205 return((Image *) NULL);
206 }
207 (void) memset(&rla_info,0,sizeof(rla_info));
208 rla_info.window.left=(short) ReadBlobMSBShort(image);
209 rla_info.window.right=(short) ReadBlobMSBShort(image);
210 rla_info.window.bottom=(short) ReadBlobMSBShort(image);
211 rla_info.window.top=(short) ReadBlobMSBShort(image);
212 rla_info.active_window.left=(short) ReadBlobMSBShort(image);
213 rla_info.active_window.right=(short) ReadBlobMSBShort(image);
214 rla_info.active_window.bottom=(short) ReadBlobMSBShort(image);
215 rla_info.active_window.top=(short) ReadBlobMSBShort(image);
216 rla_info.frame=(short) ReadBlobMSBShort(image);
217 rla_info.storage_type=(short) ReadBlobMSBShort(image);
218 rla_info.number_channels=(short) ReadBlobMSBShort(image);
219 if (rla_info.number_channels < 0)
220 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
221 rla_info.number_matte_channels=(short) ReadBlobMSBShort(image);
222 if (rla_info.number_matte_channels < 0)
223 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
224 if ((rla_info.number_channels > 3) || (rla_info.number_matte_channels > 3))
225 ThrowReaderException(CoderError,"Unsupported number of channels");
226 if (rla_info.number_channels == 0)
227 rla_info.number_channels=3;
228 rla_info.number_channels+=rla_info.number_matte_channels;
229 rla_info.number_auxiliary_channels=(short) ReadBlobMSBShort(image);
230 rla_info.revision=(short) ReadBlobMSBShort(image);
231 (void) ReadBlob(image,16,(unsigned char *) rla_info.gamma);
232 (void) ReadBlob(image,24,(unsigned char *) rla_info.red_primary);
233 (void) ReadBlob(image,24,(unsigned char *) rla_info.green_primary);
234 (void) ReadBlob(image,24,(unsigned char *) rla_info.blue_primary);
235 (void) ReadBlob(image,24,(unsigned char *) rla_info.white_point);
236 rla_info.job_number=ReadBlobMSBSignedLong(image);
237 (void) ReadBlob(image,128,(unsigned char *) rla_info.name);
238 (void) ReadBlob(image,128,(unsigned char *) rla_info.description);
239 rla_info.description[127]='\0';
240 (void) ReadBlob(image,64,(unsigned char *) rla_info.program);
241 (void) ReadBlob(image,32,(unsigned char *) rla_info.machine);
242 (void) ReadBlob(image,32,(unsigned char *) rla_info.user);
243 (void) ReadBlob(image,20,(unsigned char *) rla_info.date);
244 (void) ReadBlob(image,24,(unsigned char *) rla_info.aspect);
245 (void) ReadBlob(image,8,(unsigned char *) rla_info.aspect_ratio);
246 (void) ReadBlob(image,32,(unsigned char *) rla_info.chan);
247 rla_info.field=(short) ReadBlobMSBShort(image);
248 (void) ReadBlob(image,12,(unsigned char *) rla_info.time);
249 (void) ReadBlob(image,32,(unsigned char *) rla_info.filter);
250 rla_info.bits_per_channel=(short) ReadBlobMSBShort(image);
251 rla_info.matte_type=(short) ReadBlobMSBShort(image);
252 rla_info.matte_bits=(short) ReadBlobMSBShort(image);
253 rla_info.auxiliary_type=(short) ReadBlobMSBShort(image);
254 rla_info.auxiliary_bits=(short) ReadBlobMSBShort(image);
255 (void) ReadBlob(image,32,(unsigned char *) rla_info.auxiliary);
256 count=ReadBlob(image,36,(unsigned char *) rla_info.space);
257 if ((size_t) count != 36)
258 ThrowReaderException(CorruptImageError,"UnableToReadImageData");
259 rla_info.next=ReadBlobMSBSignedLong(image);
260 /*
261 Initialize image structure.
262 */
263 image->alpha_trait=rla_info.number_matte_channels != 0 ? BlendPixelTrait :
264 UndefinedPixelTrait;
265 image->columns=(size_t) (rla_info.active_window.right-
266 rla_info.active_window.left+1);
267 image->rows=(size_t) (rla_info.active_window.top-
268 rla_info.active_window.bottom+1);
269 if (image_info->ping != MagickFalse)
270 {
271 (void) CloseBlob(image);
272 return(GetFirstImageInList(image));
273 }
274 status=SetImageExtent(image,image->columns,image->rows,exception);
275 if (status == MagickFalse)
276 return(DestroyImageList(image));
277 scanlines=(MagickOffsetType *) AcquireQuantumMemory(image->rows,
278 sizeof(*scanlines));
279 if (scanlines == (MagickOffsetType *) NULL)
280 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
281 if (*rla_info.description != '\0')
282 (void) SetImageProperty(image,"comment",rla_info.description,exception);
283 /*
284 Read offsets to each scanline data.
285 */
286 for (i=0; i < (ssize_t) image->rows; i++)
287 scanlines[i]=(MagickOffsetType) ReadBlobMSBSignedLong(image);
288 if (EOFBlob(image) != MagickFalse)
289 {
290 scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines);
291 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
292 }
293 /*
294 Read image data.
295 */
296 x=0;
297 for (y=0; y < (ssize_t) image->rows; y++)
298 {
299 offset=SeekBlob(image,scanlines[image->rows-y-1],SEEK_SET);
300 if (offset < 0)
301 {
302 scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines);
303 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
304 }
305 for (channel=0; channel < (int) rla_info.number_channels; channel++)
306 {
307 length=ReadBlobMSBSignedShort(image);
308 while (length > 0)
309 {
310 byte=(unsigned char) ReadBlobByte(image);
311 runlength=byte;
312 if (byte > 127)
313 runlength=byte-256;
314 length--;
315 if (length == 0)
316 break;
317 if (runlength < 0)
318 {
319 while (runlength < 0)
320 {
321 q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
322 (ssize_t) (y % image->rows),1,1,exception);
323 if (q == (Quantum *) NULL)
324 break;
325 byte=(unsigned char) ReadBlobByte(image);
326 length--;
327 switch (channel)
328 {
329 case 0:
330 {
331 SetPixelRed(image,ScaleCharToQuantum(byte),q);
332 break;
333 }
334 case 1:
335 {
336 SetPixelGreen(image,ScaleCharToQuantum(byte),q);
337 break;
338 }
339 case 2:
340 {
341 SetPixelBlue(image,ScaleCharToQuantum(byte),q);
342 break;
343 }
344 case 3:
345 default:
346 {
347 SetPixelAlpha(image,ScaleCharToQuantum(byte),q);
348 break;
349 }
350 }
351 if (SyncAuthenticPixels(image,exception) == MagickFalse)
352 break;
353 x++;
354 runlength++;
355 }
356 continue;
357 }
358 byte=(unsigned char) ReadBlobByte(image);
359 length--;
360 runlength++;
361 do
362 {
363 q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
364 (ssize_t) (y % image->rows),1,1,exception);
365 if (q == (Quantum *) NULL)
366 break;
367 switch (channel)
368 {
369 case 0:
370 {
371 SetPixelRed(image,ScaleCharToQuantum(byte),q);
372 break;
373 }
374 case 1:
375 {
376 SetPixelGreen(image,ScaleCharToQuantum(byte),q);
377 break;
378 }
379 case 2:
380 {
381 SetPixelBlue(image,ScaleCharToQuantum(byte),q);
382 break;
383 }
384 case 3:
385 default:
386 {
387 SetPixelAlpha(image,ScaleCharToQuantum(byte),q);
388 break;
389 }
390 }
391 if (SyncAuthenticPixels(image,exception) == MagickFalse)
392 break;
393 x++;
394 runlength--;
395 }
396 while (runlength > 0);
397 }
398 }
399 if (EOFBlob(image) != MagickFalse)
400 break;
401 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
402 image->rows);
403 if (status == MagickFalse)
404 break;
405 }
406 scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines);
407 if (EOFBlob(image) != MagickFalse)
408 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
409 image->filename);
410 (void) CloseBlob(image);
411 return(GetFirstImageInList(image));
412 }
413
414 /*
415 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
416 % %
417 % %
418 % %
419 % R e g i s t e r R L A I m a g e %
420 % %
421 % %
422 % %
423 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
424 %
425 % RegisterRLAImage() adds attributes for the RLA image format to
426 % the list of supported formats. The attributes include the image format
427 % tag, a method to read and/or write the format, whether the format
428 % supports the saving of more than one frame to the same file or blob,
429 % whether the format supports native in-memory I/O, and a brief
430 % description of the format.
431 %
432 % The format of the RegisterRLAImage method is:
433 %
434 % size_t RegisterRLAImage(void)
435 %
436 */
RegisterRLAImage(void)437 ModuleExport size_t RegisterRLAImage(void)
438 {
439 MagickInfo
440 *entry;
441
442 entry=AcquireMagickInfo("RLA","RLA","Alias/Wavefront image");
443 entry->decoder=(DecodeImageHandler *) ReadRLAImage;
444 entry->flags^=CoderAdjoinFlag;
445 entry->flags|=CoderDecoderSeekableStreamFlag;
446 (void) RegisterMagickInfo(entry);
447 return(MagickImageCoderSignature);
448 }
449
450 /*
451 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
452 % %
453 % %
454 % %
455 % U n r e g i s t e r R L A I m a g e %
456 % %
457 % %
458 % %
459 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
460 %
461 % UnregisterRLAImage() removes format registrations made by the
462 % RLA module from the list of supported formats.
463 %
464 % The format of the UnregisterRLAImage method is:
465 %
466 % UnregisterRLAImage(void)
467 %
468 */
UnregisterRLAImage(void)469 ModuleExport void UnregisterRLAImage(void)
470 {
471 (void) UnregisterMagickInfo("RLA");
472 }
473