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 % Cristy %
17 % April 2007 %
18 % %
19 % %
20 % Copyright 1999-2021 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/blob.h"
44 #include "MagickCore/blob-private.h"
45 #include "MagickCore/cache.h"
46 #include "MagickCore/exception.h"
47 #include "MagickCore/exception-private.h"
48 #include "MagickCore/image.h"
49 #include "MagickCore/image-private.h"
50 #include "MagickCore/list.h"
51 #include "MagickCore/magick.h"
52 #include "MagickCore/memory_.h"
53 #include "MagickCore/option.h"
54 #include "MagickCore/pixel-accessor.h"
55 #include "MagickCore/property.h"
56 #include "MagickCore/quantum-private.h"
57 #include "MagickCore/static.h"
58 #include "MagickCore/string_.h"
59 #include "MagickCore/module.h"
60 #include "MagickCore/resource_.h"
61 #include "MagickCore/utility.h"
62 #if defined(MAGICKCORE_OPENEXR_DELEGATE)
63 #include <ImfCRgbaFile.h>
64 #if IMF_VERSION_NUMBER > 1
65 #include <OpenEXRConfig.h>
66 #endif
67
68 /*
69 Typedef declaractions.
70 */
71 typedef struct _EXRWindowInfo
72 {
73 int
74 max_x,
75 max_y,
76 min_x,
77 min_y;
78 } EXRWindowInfo;
79
80 /*
81 Forward declarations.
82 */
83 static MagickBooleanType
84 WriteEXRImage(const ImageInfo *,Image *,ExceptionInfo *);
85 #endif
86
87 /*
88 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
89 % %
90 % %
91 % %
92 % I s E X R %
93 % %
94 % %
95 % %
96 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
97 %
98 % IsEXR() returns MagickTrue if the image format type, identified by the
99 % magick string, is EXR.
100 %
101 % The format of the IsEXR method is:
102 %
103 % MagickBooleanType IsEXR(const unsigned char *magick,const size_t length)
104 %
105 % A description of each parameter follows:
106 %
107 % o magick: compare image format pattern against these bytes.
108 %
109 % o length: Specifies the length of the magick string.
110 %
111 */
IsEXR(const unsigned char * magick,const size_t length)112 static MagickBooleanType IsEXR(const unsigned char *magick,const size_t length)
113 {
114 if (length < 4)
115 return(MagickFalse);
116 if (memcmp(magick,"\166\057\061\001",4) == 0)
117 return(MagickTrue);
118 return(MagickFalse);
119 }
120
121 #if defined(MAGICKCORE_OPENEXR_DELEGATE)
122 /*
123 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
124 % %
125 % %
126 % %
127 % R e a d E X R I m a g e %
128 % %
129 % %
130 % %
131 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
132 %
133 % ReadEXRImage reads an image in the high dynamic-range (HDR) file format
134 % developed by Industrial Light & Magic. It allocates the memory necessary
135 % for the new Image structure and returns a pointer to the new image.
136 %
137 % The format of the ReadEXRImage method is:
138 %
139 % Image *ReadEXRImage(const ImageInfo *image_info,ExceptionInfo *exception)
140 %
141 % A description of each parameter follows:
142 %
143 % o image_info: the image info.
144 %
145 % o exception: return any errors or warnings in this structure.
146 %
147 */
ReadEXRImage(const ImageInfo * image_info,ExceptionInfo * exception)148 static Image *ReadEXRImage(const ImageInfo *image_info,ExceptionInfo *exception)
149 {
150 const ImfHeader
151 *hdr_info;
152
153 EXRWindowInfo
154 data_window,
155 display_window;
156
157 Image
158 *image;
159
160 ImfInputFile
161 *file;
162
163 ImfRgba
164 *scanline;
165
166 int
167 compression;
168
169 MagickBooleanType
170 status;
171
172 Quantum
173 *q;
174
175 size_t
176 columns;
177
178 ssize_t
179 y;
180
181 /*
182 Open image.
183 */
184 assert(image_info != (const ImageInfo *) NULL);
185 assert(image_info->signature == MagickCoreSignature);
186 if (image_info->debug != MagickFalse)
187 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
188 image_info->filename);
189 assert(exception != (ExceptionInfo *) NULL);
190 assert(exception->signature == MagickCoreSignature);
191 image=AcquireImage(image_info,exception);
192 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
193 if (status == MagickFalse)
194 {
195 image=DestroyImageList(image);
196 return((Image *) NULL);
197 }
198 file=ImfOpenInputFile(image->filename);
199 if (file == (ImfInputFile *) NULL)
200 {
201 ThrowFileException(exception,BlobError,"UnableToOpenBlob",
202 ImfErrorMessage());
203 image=DestroyImageList(image);
204 return((Image *) NULL);
205 }
206 hdr_info=ImfInputHeader(file);
207 ImfHeaderDataWindow(hdr_info,&display_window.min_x,&display_window.min_y,
208 &display_window.max_x,&display_window.max_y);
209 image->columns=((size_t) display_window.max_x-display_window.min_x+1UL);
210 image->rows=((size_t) display_window.max_y-display_window.min_y+1UL);
211 image->alpha_trait=BlendPixelTrait;
212 (void) SetImageColorspace(image,RGBColorspace,exception);
213 image->gamma=1.0;
214 image->compression=NoCompression;
215 compression=ImfHeaderCompression(hdr_info);
216 if (compression == IMF_RLE_COMPRESSION)
217 image->compression=RLECompression;
218 if (compression == IMF_ZIPS_COMPRESSION)
219 image->compression=ZipSCompression;
220 if (compression == IMF_ZIP_COMPRESSION)
221 image->compression=ZipCompression;
222 if (compression == IMF_PIZ_COMPRESSION)
223 image->compression=PizCompression;
224 if (compression == IMF_PXR24_COMPRESSION)
225 image->compression=Pxr24Compression;
226 #if defined(IMF_B44_COMPRESSION)
227 if (compression == IMF_B44_COMPRESSION)
228 image->compression=B44Compression;
229 #endif
230 #if defined(IMF_B44A_COMPRESSION)
231 if (compression == IMF_B44A_COMPRESSION)
232 image->compression=B44ACompression;
233 #endif
234 #if defined(IMF_DWAA_COMPRESSION)
235 if (compression == IMF_DWAA_COMPRESSION)
236 image->compression=DWAACompression;
237 #endif
238 #if defined(IMF_DWAB_COMPRESSION)
239 if (compression == IMF_DWAB_COMPRESSION)
240 image->compression=DWABCompression;
241 #endif
242 if (image_info->ping != MagickFalse)
243 {
244 (void) ImfCloseInputFile(file);
245 (void) CloseBlob(image);
246 return(GetFirstImageInList(image));
247 }
248 status=SetImageExtent(image,image->columns,image->rows,exception);
249 if (status == MagickFalse)
250 return(DestroyImageList(image));
251 ImfHeaderDataWindow(hdr_info,&data_window.min_x,&data_window.min_y,
252 &data_window.max_x,&data_window.max_y);
253 columns=((size_t) data_window.max_x-data_window.min_x+1UL);
254 if ((display_window.min_x > data_window.max_x) ||
255 (display_window.min_x+(int) image->columns <= data_window.min_x))
256 scanline=(ImfRgba *) NULL;
257 else
258 {
259 scanline=(ImfRgba *) AcquireQuantumMemory(columns,sizeof(*scanline));
260 if (scanline == (ImfRgba *) NULL)
261 {
262 (void) ImfCloseInputFile(file);
263 image=DestroyImageList(image);
264 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
265 }
266 }
267 for (y=0; y < (ssize_t) image->rows; y++)
268 {
269 int
270 yy;
271
272 ssize_t
273 x;
274
275 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
276 if (q == (Quantum *) NULL)
277 break;
278 yy=(int) (display_window.min_y+y);
279 if ((yy < data_window.min_y) || (yy > data_window.max_y) ||
280 (scanline == (ImfRgba *) NULL))
281 {
282 for (x=0; x < (ssize_t) image->columns; x++)
283 {
284 SetPixelViaPixelInfo(image,&image->background_color,q);
285 q+=GetPixelChannels(image);
286 }
287 if (SyncAuthenticPixels(image,exception) == MagickFalse)
288 break;
289 continue;
290 }
291 (void) memset(scanline,0,columns*sizeof(*scanline));
292 ImfInputSetFrameBuffer(file,scanline-data_window.min_x-columns*yy,1,
293 columns);
294 ImfInputReadPixels(file,yy,yy);
295 for (x=0; x < (ssize_t) image->columns; x++)
296 {
297 int
298 xx;
299
300 xx=(int) (display_window.min_x+x-data_window.min_x);
301 if ((xx < 0) || (display_window.min_x+(int) x > data_window.max_x))
302 SetPixelViaPixelInfo(image,&image->background_color,q);
303 else
304 {
305 SetPixelRed(image,ClampToQuantum((MagickRealType) QuantumRange*
306 ImfHalfToFloat(scanline[xx].r)),q);
307 SetPixelGreen(image,ClampToQuantum((MagickRealType) QuantumRange*
308 ImfHalfToFloat(scanline[xx].g)),q);
309 SetPixelBlue(image,ClampToQuantum((MagickRealType) QuantumRange*
310 ImfHalfToFloat(scanline[xx].b)),q);
311 SetPixelAlpha(image,ClampToQuantum((MagickRealType) QuantumRange*
312 ImfHalfToFloat(scanline[xx].a)),q);
313 }
314 q+=GetPixelChannels(image);
315 }
316 if (SyncAuthenticPixels(image,exception) == MagickFalse)
317 break;
318 }
319 scanline=(ImfRgba *) RelinquishMagickMemory(scanline);
320 (void) ImfCloseInputFile(file);
321 (void) CloseBlob(image);
322 return(GetFirstImageInList(image));
323 }
324 #endif
325
326 /*
327 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
328 % %
329 % %
330 % %
331 % R e g i s t e r E X R I m a g e %
332 % %
333 % %
334 % %
335 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
336 %
337 % RegisterEXRImage() adds properties for the EXR image format
338 % to the list of supported formats. The properties include the image format
339 % tag, a method to read and/or write the format, whether the format
340 % supports the saving of more than one frame to the same file or blob,
341 % whether the format supports native in-memory I/O, and a brief
342 % description of the format.
343 %
344 % The format of the RegisterEXRImage method is:
345 %
346 % size_t RegisterEXRImage(void)
347 %
348 */
RegisterEXRImage(void)349 ModuleExport size_t RegisterEXRImage(void)
350 {
351 char
352 version[MagickPathExtent];
353
354 MagickInfo
355 *entry;
356
357 *version='\0';
358 entry=AcquireMagickInfo("EXR","EXR","High Dynamic-range (HDR)");
359 #if defined(MAGICKCORE_OPENEXR_DELEGATE)
360 entry->decoder=(DecodeImageHandler *) ReadEXRImage;
361 entry->encoder=(EncodeImageHandler *) WriteEXRImage;
362 #if defined( OPENEXR_PACKAGE_STRING)
363 (void) FormatLocaleString(version,MagickPathExtent,OPENEXR_PACKAGE_STRING);
364 #endif
365 #endif
366 entry->magick=(IsImageFormatHandler *) IsEXR;
367 if (*version != '\0')
368 entry->version=ConstantString(version);
369 entry->flags|=CoderDecoderSeekableStreamFlag;
370 entry->flags^=CoderAdjoinFlag;
371 entry->flags^=CoderBlobSupportFlag;
372 (void) RegisterMagickInfo(entry);
373 return(MagickImageCoderSignature);
374 }
375
376 /*
377 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
378 % %
379 % %
380 % %
381 % U n r e g i s t e r E X R I m a g e %
382 % %
383 % %
384 % %
385 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
386 %
387 % UnregisterEXRImage() removes format registrations made by the
388 % EXR module from the list of supported formats.
389 %
390 % The format of the UnregisterEXRImage method is:
391 %
392 % UnregisterEXRImage(void)
393 %
394 */
UnregisterEXRImage(void)395 ModuleExport void UnregisterEXRImage(void)
396 {
397 (void) UnregisterMagickInfo("EXR");
398 }
399
400 #if defined(MAGICKCORE_OPENEXR_DELEGATE)
401 /*
402 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
403 % %
404 % %
405 % %
406 % W r i t e E X R I m a g e %
407 % %
408 % %
409 % %
410 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
411 %
412 % WriteEXRImage() writes an image to a file the in the high dynamic-range
413 % (HDR) file format developed by Industrial Light & Magic.
414 %
415 % The format of the WriteEXRImage method is:
416 %
417 % MagickBooleanType WriteEXRImage(const ImageInfo *image_info,
418 % Image *image,ExceptionInfo *exception)
419 %
420 % A description of each parameter follows.
421 %
422 % o image_info: the image info.
423 %
424 % o image: The image.
425 %
426 % o exception: return any errors or warnings in this structure.
427 %
428 */
WriteEXRImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)429 static MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image,
430 ExceptionInfo *exception)
431 {
432 const char
433 *sampling_factor,
434 *value;
435
436 ImageInfo
437 *write_info;
438
439 ImfHalf
440 half_quantum;
441
442 ImfHeader
443 *hdr_info;
444
445 ImfOutputFile
446 *file;
447
448 ImfRgba
449 *scanline;
450
451 int
452 channels,
453 compression,
454 factors[3];
455
456 MagickBooleanType
457 status;
458
459 const Quantum
460 *p;
461
462 ssize_t
463 x;
464
465 ssize_t
466 y;
467
468 /*
469 Open output image file.
470 */
471 assert(image_info != (const ImageInfo *) NULL);
472 assert(image_info->signature == MagickCoreSignature);
473 assert(image != (Image *) NULL);
474 assert(image->signature == MagickCoreSignature);
475 if (image->debug != MagickFalse)
476 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
477 assert(exception != (ExceptionInfo *) NULL);
478 assert(exception->signature == MagickCoreSignature);
479 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
480 if (status == MagickFalse)
481 return(status);
482 (void) SetImageColorspace(image,RGBColorspace,exception);
483 write_info=CloneImageInfo(image_info);
484 (void) AcquireUniqueFilename(write_info->filename);
485 hdr_info=ImfNewHeader();
486 ImfHeaderSetDataWindow(hdr_info,0,0,(int) image->columns-1,(int)
487 image->rows-1);
488 ImfHeaderSetDisplayWindow(hdr_info,0,0,(int) image->columns-1,(int)
489 image->rows-1);
490 compression=IMF_NO_COMPRESSION;
491 if (write_info->compression == RLECompression)
492 compression=IMF_RLE_COMPRESSION;
493 if (write_info->compression == ZipSCompression)
494 compression=IMF_ZIPS_COMPRESSION;
495 if (write_info->compression == ZipCompression)
496 compression=IMF_ZIP_COMPRESSION;
497 if (write_info->compression == PizCompression)
498 compression=IMF_PIZ_COMPRESSION;
499 if (write_info->compression == Pxr24Compression)
500 compression=IMF_PXR24_COMPRESSION;
501 #if defined(IMF_B44_COMPRESSION)
502 if (write_info->compression == B44Compression)
503 compression=IMF_B44_COMPRESSION;
504 #endif
505 #if defined(IMF_B44A_COMPRESSION)
506 if (write_info->compression == B44ACompression)
507 compression=IMF_B44A_COMPRESSION;
508 #endif
509 #if defined(IMF_DWAA_COMPRESSION)
510 if (write_info->compression == DWAACompression)
511 compression=IMF_DWAA_COMPRESSION;
512 #endif
513 #if defined(IMF_DWAB_COMPRESSION)
514 if (write_info->compression == DWABCompression)
515 compression=IMF_DWAB_COMPRESSION;
516 #endif
517 channels=0;
518 value=GetImageOption(image_info,"exr:color-type");
519 if (value != (const char *) NULL)
520 {
521 if (LocaleCompare(value,"RGB") == 0)
522 channels=IMF_WRITE_RGB;
523 else if (LocaleCompare(value,"RGBA") == 0)
524 channels=IMF_WRITE_RGBA;
525 else if (LocaleCompare(value,"YC") == 0)
526 channels=IMF_WRITE_YC;
527 else if (LocaleCompare(value,"YCA") == 0)
528 channels=IMF_WRITE_YCA;
529 else if (LocaleCompare(value,"Y") == 0)
530 channels=IMF_WRITE_Y;
531 else if (LocaleCompare(value,"YA") == 0)
532 channels=IMF_WRITE_YA;
533 else if (LocaleCompare(value,"R") == 0)
534 channels=IMF_WRITE_R;
535 else if (LocaleCompare(value,"G") == 0)
536 channels=IMF_WRITE_G;
537 else if (LocaleCompare(value,"B") == 0)
538 channels=IMF_WRITE_B;
539 else if (LocaleCompare(value,"A") == 0)
540 channels=IMF_WRITE_A;
541 else
542 (void) ThrowMagickException(exception,GetMagickModule(),CoderWarning,
543 "ignoring invalid defined exr:color-type","=%s",value);
544 }
545 sampling_factor=(const char *) NULL;
546 factors[0]=0;
547 if (image_info->sampling_factor != (char *) NULL)
548 sampling_factor=image_info->sampling_factor;
549 if (sampling_factor != NULL)
550 {
551 /*
552 Sampling factors, valid values are 1x1 or 2x2.
553 */
554 if (sscanf(sampling_factor,"%d:%d:%d",factors,factors+1,factors+2) == 3)
555 {
556 if ((factors[0] == factors[1]) && (factors[1] == factors[2]))
557 factors[0]=1;
558 else
559 if ((factors[0] == (2*factors[1])) && (factors[2] == 0))
560 factors[0]=2;
561 }
562 else
563 if (sscanf(sampling_factor,"%dx%d",factors,factors+1) == 2)
564 {
565 if (factors[0] != factors[1])
566 factors[0]=0;
567 }
568 if ((factors[0] != 1) && (factors[0] != 2))
569 (void) ThrowMagickException(exception,GetMagickModule(),CoderWarning,
570 "ignoring sampling-factor","=%s",sampling_factor);
571 else if (channels != 0)
572 {
573 /*
574 Cross check given color type and subsampling.
575 */
576 factors[1]=((channels == IMF_WRITE_YCA) ||
577 (channels == IMF_WRITE_YC)) ? 2 : 1;
578 if (factors[0] != factors[1])
579 (void) ThrowMagickException(exception,GetMagickModule(),
580 CoderWarning,"sampling-factor and color type mismatch","=%s",
581 sampling_factor);
582 }
583 }
584 if (channels == 0)
585 {
586 /*
587 If no color type given, select it now.
588 */
589 if (factors[0] == 2)
590 channels=image->alpha_trait != UndefinedPixelTrait ? IMF_WRITE_YCA :
591 IMF_WRITE_YC;
592 else
593 channels=image->alpha_trait != UndefinedPixelTrait ? IMF_WRITE_RGBA :
594 IMF_WRITE_RGB;
595 }
596 ImfHeaderSetCompression(hdr_info,compression);
597 ImfHeaderSetLineOrder(hdr_info,IMF_INCREASING_Y);
598 file=ImfOpenOutputFile(write_info->filename,hdr_info,channels);
599 ImfDeleteHeader(hdr_info);
600 if (file == (ImfOutputFile *) NULL)
601 {
602 (void) RelinquishUniqueFileResource(write_info->filename);
603 write_info=DestroyImageInfo(write_info);
604 ThrowFileException(exception,BlobError,"UnableToOpenBlob",
605 ImfErrorMessage());
606 return(MagickFalse);
607 }
608 scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline));
609 if (scanline == (ImfRgba *) NULL)
610 {
611 (void) ImfCloseOutputFile(file);
612 (void) RelinquishUniqueFileResource(write_info->filename);
613 write_info=DestroyImageInfo(write_info);
614 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
615 }
616 memset(scanline,0,image->columns*sizeof(*scanline));
617 for (y=0; y < (ssize_t) image->rows; y++)
618 {
619 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
620 if (p == (const Quantum *) NULL)
621 break;
622 for (x=0; x < (ssize_t) image->columns; x++)
623 {
624 ImfFloatToHalf(QuantumScale*GetPixelRed(image,p),&half_quantum);
625 scanline[x].r=half_quantum;
626 ImfFloatToHalf(QuantumScale*GetPixelGreen(image,p),&half_quantum);
627 scanline[x].g=half_quantum;
628 ImfFloatToHalf(QuantumScale*GetPixelBlue(image,p),&half_quantum);
629 scanline[x].b=half_quantum;
630 if (image->alpha_trait == UndefinedPixelTrait)
631 ImfFloatToHalf(1.0,&half_quantum);
632 else
633 ImfFloatToHalf(QuantumScale*GetPixelAlpha(image,p),&half_quantum);
634 scanline[x].a=half_quantum;
635 p+=GetPixelChannels(image);
636 }
637 ImfOutputSetFrameBuffer(file,scanline-(y*image->columns),1,image->columns);
638 ImfOutputWritePixels(file,1);
639 }
640 (void) ImfCloseOutputFile(file);
641 scanline=(ImfRgba *) RelinquishMagickMemory(scanline);
642 (void) FileToImage(image,write_info->filename,exception);
643 (void) RelinquishUniqueFileResource(write_info->filename);
644 write_info=DestroyImageInfo(write_info);
645 (void) CloseBlob(image);
646 return(MagickTrue);
647 }
648 #endif
649