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 1999-2016 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/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) ResetMagickMemory(&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 rla_info.number_matte_channels=(short) ReadBlobMSBShort(image);
220 if (rla_info.number_channels == 0)
221 rla_info.number_channels=3;
222 rla_info.number_channels+=rla_info.number_matte_channels;
223 rla_info.number_auxiliary_channels=(short) ReadBlobMSBShort(image);
224 rla_info.revision=(short) ReadBlobMSBShort(image);
225 count=ReadBlob(image,16,(unsigned char *) rla_info.gamma);
226 count=ReadBlob(image,24,(unsigned char *) rla_info.red_primary);
227 count=ReadBlob(image,24,(unsigned char *) rla_info.green_primary);
228 count=ReadBlob(image,24,(unsigned char *) rla_info.blue_primary);
229 count=ReadBlob(image,24,(unsigned char *) rla_info.white_point);
230 rla_info.job_number=ReadBlobMSBSignedLong(image);
231 count=ReadBlob(image,128,(unsigned char *) rla_info.name);
232 count=ReadBlob(image,128,(unsigned char *) rla_info.description);
233 rla_info.description[127]='\0';
234 count=ReadBlob(image,64,(unsigned char *) rla_info.program);
235 count=ReadBlob(image,32,(unsigned char *) rla_info.machine);
236 count=ReadBlob(image,32,(unsigned char *) rla_info.user);
237 count=ReadBlob(image,20,(unsigned char *) rla_info.date);
238 count=ReadBlob(image,24,(unsigned char *) rla_info.aspect);
239 count=ReadBlob(image,8,(unsigned char *) rla_info.aspect_ratio);
240 count=ReadBlob(image,32,(unsigned char *) rla_info.chan);
241 rla_info.field=(short) ReadBlobMSBShort(image);
242 count=ReadBlob(image,12,(unsigned char *) rla_info.time);
243 count=ReadBlob(image,32,(unsigned char *) rla_info.filter);
244 rla_info.bits_per_channel=(short) ReadBlobMSBShort(image);
245 rla_info.matte_type=(short) ReadBlobMSBShort(image);
246 rla_info.matte_bits=(short) ReadBlobMSBShort(image);
247 rla_info.auxiliary_type=(short) ReadBlobMSBShort(image);
248 rla_info.auxiliary_bits=(short) ReadBlobMSBShort(image);
249 count=ReadBlob(image,32,(unsigned char *) rla_info.auxiliary);
250 count=ReadBlob(image,36,(unsigned char *) rla_info.space);
251 if ((size_t) count != 36)
252 ThrowReaderException(CorruptImageError,"UnableToReadImageData");
253 rla_info.next=ReadBlobMSBSignedLong(image);
254 /*
255 Initialize image structure.
256 */
257 image->alpha_trait=rla_info.number_matte_channels != 0 ? BlendPixelTrait :
258 UndefinedPixelTrait;
259 image->columns=(size_t) (rla_info.active_window.right-
260 rla_info.active_window.left+1);
261 image->rows=(size_t) (rla_info.active_window.top-
262 rla_info.active_window.bottom+1);
263 if (image_info->ping != MagickFalse)
264 {
265 (void) CloseBlob(image);
266 return(GetFirstImageInList(image));
267 }
268 status=SetImageExtent(image,image->columns,image->rows,exception);
269 if (status == MagickFalse)
270 return(DestroyImageList(image));
271 scanlines=(MagickOffsetType *) AcquireQuantumMemory(image->rows,
272 sizeof(*scanlines));
273 if (scanlines == (MagickOffsetType *) NULL)
274 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
275 if (*rla_info.description != '\0')
276 (void) SetImageProperty(image,"comment",rla_info.description,exception);
277 /*
278 Read offsets to each scanline data.
279 */
280 for (i=0; i < (ssize_t) image->rows; i++)
281 scanlines[i]=(MagickOffsetType) ReadBlobMSBSignedLong(image);
282 /*
283 Read image data.
284 */
285 x=0;
286 for (y=0; y < (ssize_t) image->rows; y++)
287 {
288 offset=SeekBlob(image,scanlines[image->rows-y-1],SEEK_SET);
289 if (offset < 0)
290 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
291 for (channel=0; channel < (int) rla_info.number_channels; channel++)
292 {
293 length=ReadBlobMSBSignedShort(image);
294 while (length > 0)
295 {
296 byte=(unsigned char) ReadBlobByte(image);
297 runlength=byte;
298 if (byte > 127)
299 runlength=byte-256;
300 length--;
301 if (length == 0)
302 break;
303 if (runlength < 0)
304 {
305 while (runlength < 0)
306 {
307 q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
308 (ssize_t) (y % image->rows),1,1,exception);
309 if (q == (Quantum *) NULL)
310 break;
311 byte=(unsigned char) ReadBlobByte(image);
312 length--;
313 switch (channel)
314 {
315 case 0:
316 {
317 SetPixelRed(image,ScaleCharToQuantum(byte),q);
318 break;
319 }
320 case 1:
321 {
322 SetPixelGreen(image,ScaleCharToQuantum(byte),q);
323 break;
324 }
325 case 2:
326 {
327 SetPixelBlue(image,ScaleCharToQuantum(byte),q);
328 break;
329 }
330 case 3:
331 default:
332 {
333 SetPixelAlpha(image,ScaleCharToQuantum(byte),q);
334 break;
335 }
336 }
337 if (SyncAuthenticPixels(image,exception) == MagickFalse)
338 break;
339 x++;
340 runlength++;
341 }
342 continue;
343 }
344 byte=(unsigned char) ReadBlobByte(image);
345 length--;
346 runlength++;
347 do
348 {
349 q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
350 (ssize_t) (y % image->rows),1,1,exception);
351 if (q == (Quantum *) NULL)
352 break;
353 switch (channel)
354 {
355 case 0:
356 {
357 SetPixelRed(image,ScaleCharToQuantum(byte),q);
358 break;
359 }
360 case 1:
361 {
362 SetPixelGreen(image,ScaleCharToQuantum(byte),q);
363 break;
364 }
365 case 2:
366 {
367 SetPixelBlue(image,ScaleCharToQuantum(byte),q);
368 break;
369 }
370 case 3:
371 default:
372 {
373 SetPixelAlpha(image,ScaleCharToQuantum(byte),q);
374 break;
375 }
376 }
377 if (SyncAuthenticPixels(image,exception) == MagickFalse)
378 break;
379 x++;
380 runlength--;
381 }
382 while (runlength > 0);
383 }
384 }
385 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
386 image->rows);
387 if (status == MagickFalse)
388 break;
389 }
390 if (EOFBlob(image) != MagickFalse)
391 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
392 image->filename);
393 scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines);
394 (void) CloseBlob(image);
395 return(GetFirstImageInList(image));
396 }
397
398 /*
399 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
400 % %
401 % %
402 % %
403 % R e g i s t e r R L A I m a g e %
404 % %
405 % %
406 % %
407 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
408 %
409 % RegisterRLAImage() adds attributes for the RLA image format to
410 % the list of supported formats. The attributes include the image format
411 % tag, a method to read and/or write the format, whether the format
412 % supports the saving of more than one frame to the same file or blob,
413 % whether the format supports native in-memory I/O, and a brief
414 % description of the format.
415 %
416 % The format of the RegisterRLAImage method is:
417 %
418 % size_t RegisterRLAImage(void)
419 %
420 */
RegisterRLAImage(void)421 ModuleExport size_t RegisterRLAImage(void)
422 {
423 MagickInfo
424 *entry;
425
426 entry=AcquireMagickInfo("RLA","RLA","Alias/Wavefront image");
427 entry->decoder=(DecodeImageHandler *) ReadRLAImage;
428 entry->flags^=CoderAdjoinFlag;
429 entry->flags|=CoderSeekableStreamFlag;
430 (void) RegisterMagickInfo(entry);
431 return(MagickImageCoderSignature);
432 }
433
434 /*
435 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
436 % %
437 % %
438 % %
439 % U n r e g i s t e r R L A I m a g e %
440 % %
441 % %
442 % %
443 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
444 %
445 % UnregisterRLAImage() removes format registrations made by the
446 % RLA module from the list of supported formats.
447 %
448 % The format of the UnregisterRLAImage method is:
449 %
450 % UnregisterRLAImage(void)
451 %
452 */
UnregisterRLAImage(void)453 ModuleExport void UnregisterRLAImage(void)
454 {
455 (void) UnregisterMagickInfo("RLA");
456 }
457