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gerrit-public.fairphone.software / platform / external / ImageMagick / 54a531d335ea060a99bead94dcdf45f18496fa83 / . / coders / rla.c
blob: 917c9b5d9dfbc9fa5882335903903c0bcefd7ae9 [file] [log] [blame]
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]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% John Cristy %
17% July 1992 %
18% %
19% %
20% Copyright 1999-2009 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 "magick/studio.h"
43#include "magick/property.h"
44#include "magick/blob.h"
45#include "magick/blob-private.h"
46#include "magick/cache.h"
47#include "magick/exception.h"
48#include "magick/exception-private.h"
49#include "magick/image.h"
50#include "magick/image-private.h"
51#include "magick/list.h"
52#include "magick/magick.h"
53#include "magick/memory_.h"
54#include "magick/monitor.h"
55#include "magick/monitor-private.h"
56#include "magick/quantum-private.h"
57#include "magick/static.h"
58#include "magick/string_.h"
59#include "magick/module.h"
60
61/*
62%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
63% %
64% %
65% %
66% R e a d R L A I m a g e %
67% %
68% %
69% %
70%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
71%
72% ReadRLAImage() reads a run-length encoded Wavefront RLA image file
73% and returns it. It allocates the memory necessary for the new Image
74% structure and returns a pointer to the new image.
75%
76% Note: This module was contributed by Lester Vecsey (master@internexus.net).
77%
78% The format of the ReadRLAImage method is:
79%
80% Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
81%
82% A description of each parameter follows:
83%
84% o image_info: the image info.
85%
86% o exception: return any errors or warnings in this structure.
87%
88*/
89static Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
90{
91 typedef struct _WindowFrame
92 {
93 short
94 left,
95 right,
96 bottom,
97 top;
98 } WindowFrame;
99
100 typedef struct _RLAInfo
101 {
102 WindowFrame
103 window,
104 active_window;
105
106 short
107 frame,
108 storage_type,
109 number_channels,
110 number_matte_channels,
111 number_auxiliary_channels,
112 revision;
113
114 char
115 gamma[16],
116 red_primary[24],
117 green_primary[24],
118 blue_primary[24],
119 white_point[24];
120
121 long
122 job_number;
123
124 char
125 name[128],
126 description[128],
127 program[64],
128 machine[32],
129 user[32],
130 date[20],
131 aspect[24],
132 aspect_ratio[8],
133 chan[32];
134
135 short
136 field;
137
138 char
139 time[12],
140 filter[32];
141
142 short
143 bits_per_channel,
144 matte_type,
145 matte_bits,
146 auxiliary_type,
147 auxiliary_bits;
148
149 char
150 auxiliary[32],
151 space[36];
152
153 long
154 next;
155 } RLAInfo;
156
157 Image
158 *image;
159
160 int
161 channel,
162 length,
163 runlength;
164
165 long
166 y;
167
168 long
169 *scanlines;
170
171 MagickBooleanType
172 status;
173
174 MagickOffsetType
175 offset;
176
177 register long
178 i,
179 x;
180
181 register PixelPacket
182 *q;
183
184 ssize_t
185 count;
186
187 RLAInfo
188 rla_info;
189
190 unsigned char
191 byte;
192
193 /*
194 Open image file.
195 */
196 assert(image_info != (const ImageInfo *) NULL);
197 assert(image_info->signature == MagickSignature);
198 if (image_info->debug != MagickFalse)
199 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
200 image_info->filename);
201 assert(exception != (ExceptionInfo *) NULL);
202 assert(exception->signature == MagickSignature);
203 image=AcquireImage(image_info);
204 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
205 if (status == MagickFalse)
206 {
207 image=DestroyImageList(image);
208 return((Image *) NULL);
209 }
210 rla_info.window.left=(short) ReadBlobMSBShort(image);
211 rla_info.window.right=(short) ReadBlobMSBShort(image);
212 rla_info.window.bottom=(short) ReadBlobMSBShort(image);
213 rla_info.window.top=(short) ReadBlobMSBShort(image);
214 rla_info.active_window.left=(short) ReadBlobMSBShort(image);
215 rla_info.active_window.right=(short) ReadBlobMSBShort(image);
216 rla_info.active_window.bottom=(short) ReadBlobMSBShort(image);
217 rla_info.active_window.top=(short) ReadBlobMSBShort(image);
218 rla_info.frame=(short) ReadBlobMSBShort(image);
219 rla_info.storage_type=(short) ReadBlobMSBShort(image);
220 rla_info.number_channels=(short) ReadBlobMSBShort(image);
221 rla_info.number_matte_channels=(short) ReadBlobMSBShort(image);
222 if (rla_info.number_channels == 0)
223 rla_info.number_channels=3;
224 rla_info.number_channels+=rla_info.number_matte_channels;
225 rla_info.number_auxiliary_channels=(short) ReadBlobMSBShort(image);
226 rla_info.revision=(short) ReadBlobMSBShort(image);
227 count=ReadBlob(image,16,(unsigned char *) rla_info.gamma);
228 count=ReadBlob(image,24,(unsigned char *) rla_info.red_primary);
229 count=ReadBlob(image,24,(unsigned char *) rla_info.green_primary);
230 count=ReadBlob(image,24,(unsigned char *) rla_info.blue_primary);
231 count=ReadBlob(image,24,(unsigned char *) rla_info.white_point);
232 rla_info.job_number=(long) ReadBlobMSBLong(image);
233 count=ReadBlob(image,128,(unsigned char *) rla_info.name);
234 count=ReadBlob(image,128,(unsigned char *) rla_info.description);
235 count=ReadBlob(image,64,(unsigned char *) rla_info.program);
236 count=ReadBlob(image,32,(unsigned char *) rla_info.machine);
237 count=ReadBlob(image,32,(unsigned char *) rla_info.user);
238 count=ReadBlob(image,20,(unsigned char *) rla_info.date);
239 count=ReadBlob(image,24,(unsigned char *) rla_info.aspect);
240 count=ReadBlob(image,8,(unsigned char *) rla_info.aspect_ratio);
241 count=ReadBlob(image,32,(unsigned char *) rla_info.chan);
242 rla_info.field=(short) ReadBlobMSBShort(image);
243 count=ReadBlob(image,12,(unsigned char *) rla_info.time);
244 count=ReadBlob(image,32,(unsigned char *) rla_info.filter);
245 rla_info.bits_per_channel=(short) ReadBlobMSBShort(image);
246 rla_info.matte_type=(short) ReadBlobMSBShort(image);
247 rla_info.matte_bits=(short) ReadBlobMSBShort(image);
248 rla_info.auxiliary_type=(short) ReadBlobMSBShort(image);
249 rla_info.auxiliary_bits=(short) ReadBlobMSBShort(image);
250 count=ReadBlob(image,32,(unsigned char *) rla_info.auxiliary);
251 count=ReadBlob(image,36,(unsigned char *) rla_info.space);
252 if ((size_t) count != 36)
253 ThrowReaderException(CorruptImageError,"UnableToReadImageData");
254 rla_info.next=(long) ReadBlobMSBLong(image);
255 /*
256 Initialize image structure.
257 */
258 image->matte=rla_info.number_matte_channels != 0 ? MagickTrue : MagickFalse;
259 image->columns=1UL*rla_info.active_window.right-rla_info.active_window.left+1;
260 image->rows=1UL*rla_info.active_window.top-rla_info.active_window.bottom+1;
261 if (image_info->ping != MagickFalse)
262 {
263 (void) CloseBlob(image);
264 return(GetFirstImageInList(image));
265 }
266 scanlines=(long *) AcquireQuantumMemory(image->rows,sizeof(*scanlines));
267 if (scanlines == (long *) NULL)
268 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
269 if (*rla_info.description != '\0')
270 (void) SetImageProperty(image,"comment",rla_info.description);
271 /*
272 Read offsets to each scanline data.
273 */
274 for (i=0; i < (long) image->rows; i++)
275 scanlines[i]=(long) ReadBlobMSBLong(image);
276 /*
277 Read image data.
278 */
279 x=0;
280 for (y=0; y < (long) image->rows; y++)
281 {
282 offset=SeekBlob(image,scanlines[image->rows-y-1],SEEK_SET);
283 if (offset < 0)
284 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
285 for (channel=0; channel < (int) rla_info.number_channels; channel++)
286 {
287 length=(int) ReadBlobMSBShort(image);
288 while (length > 0)
289 {
290 byte=(unsigned char) ReadBlobByte(image);
291 runlength=byte;
292 if (byte > 127)
293 runlength=byte-256;
294 length--;
295 if (length == 0)
296 break;
297 if (runlength < 0)
298 {
299 while (runlength < 0)
300 {
301 q=GetAuthenticPixels(image,(long) (x % image->columns),
302 (long) (y % image->rows),1,1,exception);
303 if (q == (PixelPacket *) NULL)
304 break;
305 byte=(unsigned char) ReadBlobByte(image);
306 length--;
307 switch (channel)
308 {
309 case 0:
310 {
311 q->red=ScaleCharToQuantum(byte);
312 break;
313 }
314 case 1:
315 {
316 q->green=ScaleCharToQuantum(byte);
317 break;
318 }
319 case 2:
320 {
321 q->blue=ScaleCharToQuantum(byte);
322 break;
323 }
324 case 3:
325 default:
326 {
327 q->opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(byte));
328 break;
329 }
330 }
331 if (SyncAuthenticPixels(image,exception) == MagickFalse)
332 break;
333 x++;
334 runlength++;
335 }
336 continue;
337 }
338 byte=(unsigned char) ReadBlobByte(image);
339 length--;
340 runlength++;
341 do
342 {
343 q=GetAuthenticPixels(image,(long) (x % image->columns),
344 (long) (y % image->rows),1,1,exception);
345 if (q == (PixelPacket *) NULL)
346 break;
347 switch (channel)
348 {
349 case 0:
350 {
351 q->red=ScaleCharToQuantum(byte);
352 break;
353 }
354 case 1:
355 {
356 q->green=ScaleCharToQuantum(byte);
357 break;
358 }
359 case 2:
360 {
361 q->blue=ScaleCharToQuantum(byte);
362 break;
363 }
364 case 3:
365 default:
366 {
367 q->opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(byte));
368 break;
369 }
370 }
371 if (SyncAuthenticPixels(image,exception) == MagickFalse)
372 break;
373 x++;
374 runlength--;
375 }
376 while (runlength > 0);
377 }
378 }
379 status=SetImageProgress(image,LoadImageTag,y,image->rows);
380 if (status == MagickFalse)
381 break;
382 }
383 if (EOFBlob(image) != MagickFalse)
384 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
385 image->filename);
386 (void) CloseBlob(image);
387 return(GetFirstImageInList(image));
388}
389
390/*
391%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
392% %
393% %
394% %
395% R e g i s t e r R L A I m a g e %
396% %
397% %
398% %
399%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
400%
401% RegisterRLAImage() adds attributes for the RLA image format to
402% the list of supported formats. The attributes include the image format
403% tag, a method to read and/or write the format, whether the format
404% supports the saving of more than one frame to the same file or blob,
405% whether the format supports native in-memory I/O, and a brief
406% description of the format.
407%
408% The format of the RegisterRLAImage method is:
409%
410% unsigned long RegisterRLAImage(void)
411%
412*/
413ModuleExport unsigned long RegisterRLAImage(void)
414{
415 MagickInfo
416 *entry;
417
418 entry=SetMagickInfo("RLA");
419 entry->decoder=(DecodeImageHandler *) ReadRLAImage;
420 entry->adjoin=MagickFalse;
421 entry->description=ConstantString("Alias/Wavefront image");
422 entry->module=ConstantString("RLA");
423 (void) RegisterMagickInfo(entry);
424 return(MagickImageCoderSignature);
425}
426
427/*
428%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
429% %
430% %
431% %
432% U n r e g i s t e r R L A I m a g e %
433% %
434% %
435% %
436%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
437%
438% UnregisterRLAImage() removes format registrations made by the
439% RLA module from the list of supported formats.
440%
441% The format of the UnregisterRLAImage method is:
442%
443% UnregisterRLAImage(void)
444%
445*/
446ModuleExport void UnregisterRLAImage(void)
447{
448 (void) UnregisterMagickInfo("RLA");
449}