2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read Alias/Wavefront Image Format %
20 % Copyright 1999-2018 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % https://www.imagemagick.org/script/license.php %
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. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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"
63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
67 % R e a d R L A I m a g e %
71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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.
77 % Note: This module was contributed by Lester Vecsey (master@internexus.net).
79 % The format of the ReadRLAImage method is:
81 % Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
83 % A description of each parameter follows:
85 % o image_info: the image info.
87 % o exception: return any errors or warnings in this structure.
90 static Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
92 typedef struct _WindowFrame
101 typedef struct _RLAInfo
111 number_matte_channels,
112 number_auxiliary_channels,
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)
204 image=DestroyImageList(image);
205 return((Image *) NULL);
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);
261 Initialize image structure.
263 image->alpha_trait=rla_info.number_matte_channels != 0 ? BlendPixelTrait :
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)
271 (void) CloseBlob(image);
272 return(GetFirstImageInList(image));
274 status=SetImageExtent(image,image->columns,image->rows,exception);
275 if (status == MagickFalse)
276 return(DestroyImageList(image));
277 scanlines=(MagickOffsetType *) AcquireQuantumMemory(image->rows,
279 if (scanlines == (MagickOffsetType *) NULL)
280 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
281 if (*rla_info.description != '\0')
282 (void) SetImageProperty(image,"comment",rla_info.description,exception);
284 Read offsets to each scanline data.
286 for (i=0; i < (ssize_t) image->rows; i++)
287 scanlines[i]=(MagickOffsetType) ReadBlobMSBSignedLong(image);
288 if (EOFBlob(image) != MagickFalse)
290 scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines);
291 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
297 for (y=0; y < (ssize_t) image->rows; y++)
299 offset=SeekBlob(image,scanlines[image->rows-y-1],SEEK_SET);
302 scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines);
303 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
305 for (channel=0; channel < (int) rla_info.number_channels; channel++)
307 length=ReadBlobMSBSignedShort(image);
310 byte=(unsigned char) ReadBlobByte(image);
319 while (runlength < 0)
321 q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
322 (ssize_t) (y % image->rows),1,1,exception);
323 if (q == (Quantum *) NULL)
325 byte=(unsigned char) ReadBlobByte(image);
331 SetPixelRed(image,ScaleCharToQuantum(byte),q);
336 SetPixelGreen(image,ScaleCharToQuantum(byte),q);
341 SetPixelBlue(image,ScaleCharToQuantum(byte),q);
347 SetPixelAlpha(image,ScaleCharToQuantum(byte),q);
351 if (SyncAuthenticPixels(image,exception) == MagickFalse)
358 byte=(unsigned char) ReadBlobByte(image);
363 q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
364 (ssize_t) (y % image->rows),1,1,exception);
365 if (q == (Quantum *) NULL)
371 SetPixelRed(image,ScaleCharToQuantum(byte),q);
376 SetPixelGreen(image,ScaleCharToQuantum(byte),q);
381 SetPixelBlue(image,ScaleCharToQuantum(byte),q);
387 SetPixelAlpha(image,ScaleCharToQuantum(byte),q);
391 if (SyncAuthenticPixels(image,exception) == MagickFalse)
396 while (runlength > 0);
399 if (EOFBlob(image) != MagickFalse)
401 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
403 if (status == MagickFalse)
406 scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines);
407 if (EOFBlob(image) != MagickFalse)
408 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
410 (void) CloseBlob(image);
411 return(GetFirstImageInList(image));
415 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
419 % R e g i s t e r R L A I m a g e %
423 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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.
432 % The format of the RegisterRLAImage method is:
434 % size_t RegisterRLAImage(void)
437 ModuleExport size_t RegisterRLAImage(void)
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);
451 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
455 % U n r e g i s t e r R L A I m a g e %
459 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
461 % UnregisterRLAImage() removes format registrations made by the
462 % RLA module from the list of supported formats.
464 % The format of the UnregisterRLAImage method is:
466 % UnregisterRLAImage(void)
469 ModuleExport void UnregisterRLAImage(void)
471 (void) UnregisterMagickInfo("RLA");