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gerrit-public.fairphone.software / platform / external / ImageMagick / 16af1cbdffcc02e7239d432e5fb51734fcf9f9ff / . / coders / exr.c
blob: b78537732bfbb0e06c963a36b2838acd3c69151a [file] [log] [blame]
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3% %
4% %
5% %
6% EEEEE X X RRRR %
7% E X X R R %
8% EEE X RRRR %
9% E X X R R %
10% EEEEE X X R R %
11% %
12% %
13% Read/Write High Dynamic-Range (HDR) Image File Format %
14% %
15% Software Design %
16% John Cristy %
17% April 2007 %
18% %
19% %
cristy16af1cb2009-12-11 21:38:29 +0000[diff] [blame^]20% Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization %
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]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/blob.h"
44#include "magick/blob-private.h"
45#include "magick/cache.h"
46#include "magick/exception.h"
47#include "magick/exception-private.h"
48#include "magick/image.h"
49#include "magick/image-private.h"
50#include "magick/list.h"
51#include "magick/magick.h"
52#include "magick/memory_.h"
53#include "magick/property.h"
54#include "magick/quantum-private.h"
55#include "magick/static.h"
56#include "magick/string_.h"
57#include "magick/module.h"
58#include "magick/resource_.h"
59#include "magick/utility.h"
60#if defined(MAGICKCORE_OPENEXR_DELEGATE)
61#include <ImfCRgbaFile.h>
62
63/*
64 Forward declarations.
65*/
66static MagickBooleanType
67 WriteEXRImage(const ImageInfo *,Image *);
68#endif
69
70/*
71%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72% %
73% %
74% %
75% I s E X R %
76% %
77% %
78% %
79%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
80%
81% IsEXR() returns MagickTrue if the image format type, identified by the
82% magick string, is EXR.
83%
84% The format of the IsEXR method is:
85%
86% MagickBooleanType IsEXR(const unsigned char *magick,const size_t length)
87%
88% A description of each parameter follows:
89%
90% o magick: compare image format pattern against these bytes.
91%
92% o length: Specifies the length of the magick string.
93%
94*/
95static MagickBooleanType IsEXR(const unsigned char *magick,const size_t length)
96{
97 if (length < 4)
98 return(MagickFalse);
99 if (memcmp(magick,"\166\057\061\001",4) == 0)
100 return(MagickTrue);
101 return(MagickFalse);
102}
103
104#if defined(MAGICKCORE_OPENEXR_DELEGATE)
105/*
106%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
107% %
108% %
109% %
110% R e a d E X R I m a g e %
111% %
112% %
113% %
114%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
115%
116% ReadEXRImage reads an image in the high dynamic-range (HDR) file format
117% developed by Industrial Light & Magic. It allocates the memory necessary
118% for the new Image structure and returns a pointer to the new image.
119%
120% The format of the ReadEXRImage method is:
121%
122% Image *ReadEXRImage(const ImageInfo *image_info,ExceptionInfo *exception)
123%
124% A description of each parameter follows:
125%
126% o image_info: the image info.
127%
128% o exception: return any errors or warnings in this structure.
129%
130*/
131static Image *ReadEXRImage(const ImageInfo *image_info,ExceptionInfo *exception)
132{
133 const ImfHeader
134 *hdr_info;
135
136 Image
137 *image;
138
139 ImageInfo
140 *read_info;
141
142 ImfInputFile
143 *file;
144
145 ImfRgba
146 *scanline;
147
148 int
149 max_x,
150 max_y,
151 min_x,
152 min_y;
153
154 long
155 y;
156
157 register long
158 x;
159
160 register PixelPacket
161 *q;
162
163 MagickBooleanType
164 status;
165
166 /*
167 Open image.
168 */
169 assert(image_info != (const ImageInfo *) NULL);
170 assert(image_info->signature == MagickSignature);
171 if (image_info->debug != MagickFalse)
172 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
173 image_info->filename);
174 assert(exception != (ExceptionInfo *) NULL);
175 assert(exception->signature == MagickSignature);
176 image=AcquireImage(image_info);
177 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
178 if (status == MagickFalse)
179 {
180 image=DestroyImageList(image);
181 return((Image *) NULL);
182 }
183 read_info=CloneImageInfo(image_info);
184 if (IsPathAccessible(read_info->filename) == MagickFalse)
185 {
186 (void) AcquireUniqueFilename(read_info->filename);
187 (void) ImageToFile(image,read_info->filename,exception);
188 }
189 file=ImfOpenInputFile(read_info->filename);
190 if (file == (ImfInputFile *) NULL)
191 {
192 ThrowFileException(exception,BlobError,"UnableToOpenBlob",
193 ImfErrorMessage());
194 read_info=DestroyImageInfo(read_info);
195 return((Image *) NULL);
196 }
197 hdr_info=ImfInputHeader(file);
198 ImfHeaderDataWindow(hdr_info,&min_x,&min_y,&max_x,&max_y);
199 image->columns=max_x-min_x+1UL;
200 image->rows=max_y-min_y+1UL;
201 image->matte=MagickTrue;
202 if (image_info->ping != MagickFalse)
203 {
204 (void) ImfCloseInputFile(file);
205 if (LocaleCompare(image_info->filename,read_info->filename) != 0)
206 (void) RelinquishUniqueFileResource(read_info->filename);
207 read_info=DestroyImageInfo(read_info);
208 (void) CloseBlob(image);
209 return(GetFirstImageInList(image));
210 }
211 scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline));
212 if (scanline == (ImfRgba *) NULL)
213 {
214 (void) ImfCloseInputFile(file);
215 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
216 }
217 for (y=0; y < (long) image->rows; y++)
218 {
219 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
220 if (q == (PixelPacket *) NULL)
221 break;
222 ImfInputSetFrameBuffer(file,scanline-min_x-image->columns*(min_y+y),1,
223 image->columns);
224 ImfInputReadPixels(file,min_y+y,min_y+y);
225 for (x=0; x < (long) image->columns; x++)
226 {
227 q->red=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat(
228 scanline[x].r));
229 q->green=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat(
230 scanline[x].g));
231 q->blue=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat(
232 scanline[x].b));
233 q->opacity=RoundToQuantum((MagickRealType) QuantumRange-QuantumRange*
234 ImfHalfToFloat(scanline[x].a));
235 q++;
236 }
237 if (SyncAuthenticPixels(image,exception) == MagickFalse)
238 break;
239 }
240 scanline=(ImfRgba *) RelinquishMagickMemory(scanline);
241 (void) ImfCloseInputFile(file);
242 if (LocaleCompare(image_info->filename,read_info->filename) != 0)
243 (void) RelinquishUniqueFileResource(read_info->filename);
244 read_info=DestroyImageInfo(read_info);
245 (void) CloseBlob(image);
246 return(GetFirstImageInList(image));
247}
248#endif
249
250/*
251%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
252% %
253% %
254% %
255% R e g i s t e r E X R I m a g e %
256% %
257% %
258% %
259%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
260%
261% RegisterEXRImage() adds properties for the EXR image format
262% to the list of supported formats. The properties include the image format
263% tag, a method to read and/or write the format, whether the format
264% supports the saving of more than one frame to the same file or blob,
265% whether the format supports native in-memory I/O, and a brief
266% description of the format.
267%
268% The format of the RegisterEXRImage method is:
269%
270% unsigned long RegisterEXRImage(void)
271%
272*/
273ModuleExport unsigned long RegisterEXRImage(void)
274{
275 MagickInfo
276 *entry;
277
278 entry=SetMagickInfo("EXR");
279#if defined(MAGICKCORE_OPENEXR_DELEGATE)
280 entry->decoder=(DecodeImageHandler *) ReadEXRImage;
281 entry->encoder=(EncodeImageHandler *) WriteEXRImage;
282#endif
283 entry->magick=(IsImageFormatHandler *) IsEXR;
284 entry->adjoin=MagickFalse;
285 entry->description=ConstantString("High Dynamic-range (HDR)");
286 entry->blob_support=MagickFalse;
287 entry->module=ConstantString("EXR");
288 (void) RegisterMagickInfo(entry);
289 return(MagickImageCoderSignature);
290}
291
292/*
293%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
294% %
295% %
296% %
297% U n r e g i s t e r E X R I m a g e %
298% %
299% %
300% %
301%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
302%
303% UnregisterEXRImage() removes format registrations made by the
304% EXR module from the list of supported formats.
305%
306% The format of the UnregisterEXRImage method is:
307%
308% UnregisterEXRImage(void)
309%
310*/
311ModuleExport void UnregisterEXRImage(void)
312{
313 (void) UnregisterMagickInfo("EXR");
314}
315
316#if defined(MAGICKCORE_OPENEXR_DELEGATE)
317/*
318%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
319% %
320% %
321% %
322% W r i t e E X R I m a g e %
323% %
324% %
325% %
326%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
327%
328% WriteEXRImage() writes an image to a file the in the high dynamic-range
329% (HDR) file format developed by Industrial Light & Magic.
330%
331% The format of the WriteEXRImage method is:
332%
333% MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image)
334%
335% A description of each parameter follows.
336%
337% o image_info: the image info.
338%
339% o image: The image.
340%
341*/
342static MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image)
343{
344 ImageInfo
345 *write_info;
346
347 ImfHalf
348 half_quantum;
349
350 ImfHeader
351 *hdr_info;
352
353 ImfOutputFile
354 *file;
355
356 ImfRgba
357 *scanline;
358
359 int
360 compression;
361
362 long
363 y;
364
365 MagickBooleanType
366 status;
367
368 register const PixelPacket
369 *p;
370
371 register long
372 x;
373
374 /*
375 Open output image file.
376 */
377 assert(image_info != (const ImageInfo *) NULL);
378 assert(image_info->signature == MagickSignature);
379 assert(image != (Image *) NULL);
380 assert(image->signature == MagickSignature);
381 if (image->debug != MagickFalse)
382 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
383 status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
384 if (status == MagickFalse)
385 return(status);
386 write_info=CloneImageInfo(image_info);
387 (void) AcquireUniqueFilename(write_info->filename);
388 hdr_info=ImfNewHeader();
389 ImfHeaderSetDataWindow(hdr_info,0,0,(int) image->columns-1,(int)
390 image->rows-1);
391 ImfHeaderSetDisplayWindow(hdr_info,0,0,(int) image->columns-1,(int)
392 image->rows-1);
393 compression=IMF_NO_COMPRESSION;
394 if (write_info->compression == ZipSCompression)
395 compression=IMF_ZIPS_COMPRESSION;
396 if (write_info->compression == ZipCompression)
397 compression=IMF_ZIP_COMPRESSION;
398 if (write_info->compression == PizCompression)
399 compression=IMF_PIZ_COMPRESSION;
400 if (write_info->compression == Pxr24Compression)
401 compression=IMF_PXR24_COMPRESSION;
402#if defined(B44Compression)
403 if (write_info->compression == B44Compression)
404 compression=IMF_B44_COMPRESSION;
405#endif
406#if defined(B44ACompression)
407 if (write_info->compression == B44ACompression)
408 compression=IMF_B44A_COMPRESSION;
409#endif
410 ImfHeaderSetCompression(hdr_info,compression);
411 ImfHeaderSetLineOrder(hdr_info,IMF_INCREASING_Y);
412 file=ImfOpenOutputFile(write_info->filename,hdr_info,IMF_WRITE_RGBA);
413 ImfDeleteHeader(hdr_info);
414 if (file == (ImfOutputFile *) NULL)
415 {
416 ThrowFileException(&image->exception,BlobError,"UnableToOpenBlob",
417 ImfErrorMessage());
418 write_info=DestroyImageInfo(write_info);
419 return(MagickFalse);
420 }
421 scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline));
422 if (scanline == (ImfRgba *) NULL)
423 {
424 (void) ImfCloseOutputFile(file);
425 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
426 }
427 for (y=0; y < (long) image->rows; y++)
428 {
429 p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
430 if (p == (const PixelPacket *) NULL)
431 break;
432 for (x=0; x < (long) image->columns; x++)
433 {
434 ImfFloatToHalf(QuantumScale*p->red,&half_quantum);
435 scanline[x].r=half_quantum;
436 ImfFloatToHalf(QuantumScale*p->green,&half_quantum);
437 scanline[x].g=half_quantum;
438 ImfFloatToHalf(QuantumScale*p->blue,&half_quantum);
439 scanline[x].b=half_quantum;
440 if (image->matte == MagickFalse)
441 ImfFloatToHalf(1.0,&half_quantum);
442 else
443 ImfFloatToHalf(1.0-QuantumScale*p->opacity,&half_quantum);
444 scanline[x].a=half_quantum;
445 p++;
446 }
447 ImfOutputSetFrameBuffer(file,scanline-(y*image->columns),1,image->columns);
448 ImfOutputWritePixels(file,1);
449 }
450 (void) ImfCloseOutputFile(file);
451 scanline=(ImfRgba *) RelinquishMagickMemory(scanline);
452 (void) FileToImage(image,write_info->filename);
453 (void) RelinquishUniqueFileResource(write_info->filename);
454 write_info=DestroyImageInfo(write_info);
455 (void) CloseBlob(image);
456 return(MagickTrue);
457}
458#endif