MagickCore  7.0.8
Convert, Edit, Or Compose Bitmap Images
channel.c
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1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % CCCC H H AAA N N N N EEEEE L %
7 % C H H A A NN N NN N E L %
8 % C HHHHH AAAAA N N N N N N EEE L %
9 % C H H A A N NN N NN E L %
10 % CCCC H H A A N N N N EEEEE LLLLL %
11 % %
12 % %
13 % MagickCore Image Channel Methods %
14 % %
15 % Software Design %
16 % Cristy %
17 % December 2003 %
18 % %
19 % %
20 % Copyright 1999-2018 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 /*
41  Include declarations.
42 */
43 #include "MagickCore/studio.h"
45 #include "MagickCore/channel.h"
48 #include "MagickCore/enhance.h"
49 #include "MagickCore/image.h"
50 #include "MagickCore/list.h"
51 #include "MagickCore/log.h"
52 #include "MagickCore/monitor.h"
54 #include "MagickCore/option.h"
57 #include "MagickCore/resource_.h"
60 #include "MagickCore/token.h"
61 #include "MagickCore/utility.h"
62 #include "MagickCore/version.h"
63 
64 /*
65 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
66 % %
67 % %
68 % %
69 % C h a n n e l F x I m a g e %
70 % %
71 % %
72 % %
73 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
74 %
75 % ChannelFxImage() applies a channel expression to the specified image. The
76 % expression consists of one or more channels, either mnemonic or numeric (e.g.
77 % red, 1), separated by actions as follows:
78 %
79 % <=> exchange two channels (e.g. red<=>blue)
80 % => copy one channel to another channel (e.g. red=>green)
81 % = assign a constant value to a channel (e.g. red=50%)
82 % , write new image channels in the specified order (e.g. red, green)
83 % | add a new output image for the next set of channel operations
84 % ; move to the next input image for the source of channel data
85 %
86 % For example, to create 3 grayscale images from the red, green, and blue
87 % channels of an image, use:
88 %
89 % -channel-fx "red; green; blue"
90 %
91 % A channel without an operation symbol implies separate (i.e, semicolon).
92 %
93 % The format of the ChannelFxImage method is:
94 %
95 % Image *ChannelFxImage(const Image *image,const char *expression,
96 % ExceptionInfo *exception)
97 %
98 % A description of each parameter follows:
99 %
100 % o image: the image.
101 %
102 % o expression: A channel expression.
103 %
104 % o exception: return any errors or warnings in this structure.
105 %
106 */
107 
108 typedef enum
109 {
114 } ChannelFx;
115 
116 static MagickBooleanType ChannelImage(Image *destination_image,
117  const PixelChannel destination_channel,const ChannelFx channel_op,
118  const Image *source_image,const PixelChannel source_channel,
119  const Quantum pixel,ExceptionInfo *exception)
120 {
121  CacheView
122  *source_view,
123  *destination_view;
124 
126  status;
127 
128  size_t
129  height,
130  width;
131 
132  ssize_t
133  y;
134 
135  status=MagickTrue;
136  source_view=AcquireVirtualCacheView(source_image,exception);
137  destination_view=AcquireAuthenticCacheView(destination_image,exception);
138  height=MagickMin(source_image->rows,destination_image->rows);
139  width=MagickMin(source_image->columns,destination_image->columns);
140 #if defined(MAGICKCORE_OPENMP_SUPPORT)
141  #pragma omp parallel for schedule(static) shared(status) \
142  magick_number_threads(source_image,source_image,height,1)
143 #endif
144  for (y=0; y < (ssize_t) height; y++)
145  {
146  PixelTrait
147  destination_traits,
148  source_traits;
149 
150  register const Quantum
151  *magick_restrict p;
152 
153  register Quantum
154  *magick_restrict q;
155 
156  register ssize_t
157  x;
158 
159  if (status == MagickFalse)
160  continue;
161  p=GetCacheViewVirtualPixels(source_view,0,y,source_image->columns,1,
162  exception);
163  q=GetCacheViewAuthenticPixels(destination_view,0,y,
164  destination_image->columns,1,exception);
165  if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
166  {
167  status=MagickFalse;
168  continue;
169  }
170  destination_traits=GetPixelChannelTraits(destination_image,
171  destination_channel);
172  source_traits=GetPixelChannelTraits(source_image,source_channel);
173  if ((destination_traits == UndefinedPixelTrait) ||
174  (source_traits == UndefinedPixelTrait))
175  continue;
176  for (x=0; x < (ssize_t) width; x++)
177  {
178  if (channel_op == AssignChannelOp)
179  SetPixelChannel(destination_image,destination_channel,pixel,q);
180  else
181  SetPixelChannel(destination_image,destination_channel,
182  GetPixelChannel(source_image,source_channel,p),q);
183  p+=GetPixelChannels(source_image);
184  q+=GetPixelChannels(destination_image);
185  }
186  if (SyncCacheViewAuthenticPixels(destination_view,exception) == MagickFalse)
187  status=MagickFalse;
188  }
189  destination_view=DestroyCacheView(destination_view);
190  source_view=DestroyCacheView(source_view);
191  return(status);
192 }
193 
194 MagickExport Image *ChannelFxImage(const Image *image,const char *expression,
195  ExceptionInfo *exception)
196 {
197 #define ChannelFxImageTag "ChannelFx/Image"
198 
199  ChannelFx
200  channel_op;
201 
203  channel_mask;
204 
205  char
206  token[MagickPathExtent];
207 
208  const char
209  *p;
210 
211  const Image
212  *source_image;
213 
214  double
215  pixel;
216 
217  Image
218  *destination_image;
219 
221  status;
222 
224  source_channel,
225  destination_channel;
226 
227  ssize_t
228  channels;
229 
230  assert(image != (Image *) NULL);
231  assert(image->signature == MagickCoreSignature);
232  if (image->debug != MagickFalse)
233  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
234  assert(exception != (ExceptionInfo *) NULL);
235  assert(exception->signature == MagickCoreSignature);
236  source_image=image;
237  destination_image=CloneImage(source_image,0,0,MagickTrue,exception);
238  if (destination_image == (Image *) NULL)
239  return((Image *) NULL);
240  if (expression == (const char *) NULL)
241  return(destination_image);
242  status=SetImageStorageClass(destination_image,DirectClass,exception);
243  if (status == MagickFalse)
244  {
245  destination_image=GetLastImageInList(destination_image);
246  return((Image *) NULL);
247  }
248  destination_channel=RedPixelChannel;
249  channel_mask=UndefinedChannel;
250  pixel=0.0;
251  p=(char *) expression;
252  GetNextToken(p,&p,MagickPathExtent,token);
253  channel_op=ExtractChannelOp;
254  for (channels=0; *token != '\0'; )
255  {
256  ssize_t
257  i;
258 
259  /*
260  Interpret channel expression.
261  */
262  switch (*token)
263  {
264  case ',':
265  {
266  GetNextToken(p,&p,MagickPathExtent,token);
267  break;
268  }
269  case '|':
270  {
271  if (GetNextImageInList(source_image) != (Image *) NULL)
272  source_image=GetNextImageInList(source_image);
273  else
274  source_image=GetFirstImageInList(source_image);
275  GetNextToken(p,&p,MagickPathExtent,token);
276  break;
277  }
278  case ';':
279  {
280  Image
281  *canvas;
282 
283  (void) SetPixelChannelMask(destination_image,channel_mask);
284  if ((channel_op == ExtractChannelOp) && (channels == 1))
285  {
286  (void) SetPixelMetaChannels(destination_image,0,exception);
287  (void) SetImageColorspace(destination_image,GRAYColorspace,
288  exception);
289  }
290  canvas=CloneImage(source_image,0,0,MagickTrue,exception);
291  if (canvas == (Image *) NULL)
292  {
293  destination_image=DestroyImageList(destination_image);
294  return(destination_image);
295  }
296  AppendImageToList(&destination_image,canvas);
297  destination_image=GetLastImageInList(destination_image);
298  status=SetImageStorageClass(destination_image,DirectClass,exception);
299  if (status == MagickFalse)
300  {
301  destination_image=GetLastImageInList(destination_image);
302  return((Image *) NULL);
303  }
304  GetNextToken(p,&p,MagickPathExtent,token);
305  channels=0;
306  destination_channel=RedPixelChannel;
307  channel_mask=UndefinedChannel;
308  break;
309  }
310  default:
311  break;
312  }
313  i=ParsePixelChannelOption(token);
314  if (i < 0)
315  {
317  "UnrecognizedChannelType","`%s'",token);
318  destination_image=DestroyImageList(destination_image);
319  return(destination_image);
320  }
321  source_channel=(PixelChannel) i;
322  channel_op=ExtractChannelOp;
323  GetNextToken(p,&p,MagickPathExtent,token);
324  if (*token == '<')
325  {
326  channel_op=ExchangeChannelOp;
327  GetNextToken(p,&p,MagickPathExtent,token);
328  }
329  if (*token == '=')
330  {
331  if (channel_op != ExchangeChannelOp)
332  channel_op=AssignChannelOp;
333  GetNextToken(p,&p,MagickPathExtent,token);
334  }
335  if (*token == '>')
336  {
337  if (channel_op != ExchangeChannelOp)
338  channel_op=TransferChannelOp;
339  GetNextToken(p,&p,MagickPathExtent,token);
340  }
341  switch (channel_op)
342  {
343  case AssignChannelOp:
344  case ExchangeChannelOp:
345  case TransferChannelOp:
346  {
347  if (channel_op == AssignChannelOp)
348  pixel=StringToDoubleInterval(token,(double) QuantumRange+1.0);
349  else
350  {
351  i=ParsePixelChannelOption(token);
352  if (i < 0)
353  {
354  (void) ThrowMagickException(exception,GetMagickModule(),
355  OptionError,"UnrecognizedChannelType","`%s'",token);
356  destination_image=DestroyImageList(destination_image);
357  return(destination_image);
358  }
359  }
360  destination_channel=(PixelChannel) i;
361  if (i >= (ssize_t) GetPixelChannels(destination_image))
362  (void) SetPixelMetaChannels(destination_image,(size_t) (
363  destination_channel-GetPixelChannels(destination_image)+1),
364  exception);
365  if (image->colorspace != UndefinedColorspace)
366  switch (destination_channel)
367  {
368  case RedPixelChannel:
369  case GreenPixelChannel:
370  case BluePixelChannel:
371  case BlackPixelChannel:
372  case IndexPixelChannel:
373  break;
374  case AlphaPixelChannel:
375  {
376  destination_image->alpha_trait=BlendPixelTrait;
377  break;
378  }
380  {
381  destination_image->channels=(ChannelType)
382  (destination_image->channels | CompositeMaskChannel);
383  break;
384  }
386  {
387  destination_image->channels=(ChannelType)
388  (destination_image->channels | ReadMaskChannel);
389  break;
390  }
392  {
393  destination_image->channels=(ChannelType)
394  (destination_image->channels | WriteMaskChannel);
395  break;
396  }
397  case MetaPixelChannel:
398  default:
399  {
400  (void) SetPixelMetaChannels(destination_image,(size_t) (
401  destination_channel-GetPixelChannels(destination_image)+1),
402  exception);
403  break;
404  }
405  }
406  channel_mask=(ChannelType) (channel_mask | ParseChannelOption(token));
407  if (((channels >= 1) || (destination_channel >= 1)) &&
408  (IsGrayColorspace(destination_image->colorspace) != MagickFalse))
409  (void) SetImageColorspace(destination_image,sRGBColorspace,exception);
410  GetNextToken(p,&p,MagickPathExtent,token);
411  break;
412  }
413  default:
414  break;
415  }
416  status=ChannelImage(destination_image,destination_channel,channel_op,
417  source_image,source_channel,ClampToQuantum(pixel),exception);
418  if (status == MagickFalse)
419  {
420  destination_image=DestroyImageList(destination_image);
421  break;
422  }
423  channels++;
424  if (channel_op == ExchangeChannelOp)
425  {
426  status=ChannelImage(destination_image,source_channel,channel_op,
427  source_image,destination_channel,ClampToQuantum(pixel),exception);
428  if (status == MagickFalse)
429  {
430  destination_image=DestroyImageList(destination_image);
431  break;
432  }
433  channels++;
434  }
435  switch (channel_op)
436  {
437  case ExtractChannelOp:
438  {
439  channel_mask=(ChannelType) (channel_mask |
440  (1UL << destination_channel));
441  destination_channel=(PixelChannel) (destination_channel+1);
442  break;
443  }
444  default:
445  break;
446  }
447  status=SetImageProgress(source_image,ChannelFxImageTag,p-expression,
448  strlen(expression));
449  if (status == MagickFalse)
450  break;
451  }
452  (void) SetPixelChannelMask(destination_image,channel_mask);
453  if ((channel_op == ExtractChannelOp) && (channels == 1))
454  {
455  (void) SetPixelMetaChannels(destination_image,0,exception);
456  (void) SetImageColorspace(destination_image,GRAYColorspace,exception);
457  }
458  return(GetFirstImageInList(destination_image));
459 }
460 
461 /*
462 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
463 % %
464 % %
465 % %
466 % C o m b i n e I m a g e s %
467 % %
468 % %
469 % %
470 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
471 %
472 % CombineImages() combines one or more images into a single image. The
473 % grayscale value of the pixels of each image in the sequence is assigned in
474 % order to the specified channels of the combined image. The typical
475 % ordering would be image 1 => Red, 2 => Green, 3 => Blue, etc.
476 %
477 % The format of the CombineImages method is:
478 %
479 % Image *CombineImages(const Image *images,const ColorspaceType colorspace,
480 % ExceptionInfo *exception)
481 %
482 % A description of each parameter follows:
483 %
484 % o images: the image sequence.
485 %
486 % o colorspace: the image colorspace.
487 %
488 % o exception: return any errors or warnings in this structure.
489 %
490 */
492  const ColorspaceType colorspace,ExceptionInfo *exception)
493 {
494 #define CombineImageTag "Combine/Image"
495 
496  CacheView
497  *combine_view;
498 
499  Image
500  *combine_image;
501 
503  status;
504 
506  progress;
507 
508  ssize_t
509  y;
510 
511  /*
512  Ensure the image are the same size.
513  */
514  assert(image != (const Image *) NULL);
515  assert(image->signature == MagickCoreSignature);
516  if (image->debug != MagickFalse)
517  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
518  assert(exception != (ExceptionInfo *) NULL);
519  assert(exception->signature == MagickCoreSignature);
520  combine_image=CloneImage(image,0,0,MagickTrue,exception);
521  if (combine_image == (Image *) NULL)
522  return((Image *) NULL);
523  if (SetImageStorageClass(combine_image,DirectClass,exception) == MagickFalse)
524  {
525  combine_image=DestroyImage(combine_image);
526  return((Image *) NULL);
527  }
528  if (colorspace != UndefinedColorspace)
529  (void) SetImageColorspace(combine_image,colorspace,exception);
530  else
531  if (fabs(image->gamma-1.0) <= MagickEpsilon)
532  (void) SetImageColorspace(combine_image,RGBColorspace,exception);
533  else
534  (void) SetImageColorspace(combine_image,sRGBColorspace,exception);
535  switch (combine_image->colorspace)
536  {
537  case UndefinedColorspace:
538  case sRGBColorspace:
539  {
540  if (GetImageListLength(image) > 3)
541  combine_image->alpha_trait=BlendPixelTrait;
542  break;
543  }
545  case GRAYColorspace:
546  {
547  if (GetImageListLength(image) > 1)
548  combine_image->alpha_trait=BlendPixelTrait;
549  break;
550  }
551  case CMYKColorspace:
552  {
553  if (GetImageListLength(image) > 4)
554  combine_image->alpha_trait=BlendPixelTrait;
555  break;
556  }
557  default:
558  break;
559  }
560  /*
561  Combine images.
562  */
563  status=MagickTrue;
564  progress=0;
565  combine_view=AcquireAuthenticCacheView(combine_image,exception);
566  for (y=0; y < (ssize_t) combine_image->rows; y++)
567  {
568  CacheView
569  *image_view;
570 
571  const Image
572  *next;
573 
574  Quantum
575  *pixels;
576 
577  register const Quantum
578  *magick_restrict p;
579 
580  register Quantum
581  *magick_restrict q;
582 
583  register ssize_t
584  i;
585 
586  if (status == MagickFalse)
587  continue;
588  pixels=GetCacheViewAuthenticPixels(combine_view,0,y,combine_image->columns,
589  1,exception);
590  if (pixels == (Quantum *) NULL)
591  {
592  status=MagickFalse;
593  continue;
594  }
595  next=image;
596  for (i=0; i < (ssize_t) GetPixelChannels(combine_image); i++)
597  {
598  register ssize_t
599  x;
600 
601  PixelChannel channel = GetPixelChannelChannel(combine_image,i);
602  PixelTrait traits = GetPixelChannelTraits(combine_image,channel);
603  if (traits == UndefinedPixelTrait)
604  continue;
605  if (next == (Image *) NULL)
606  continue;
607  image_view=AcquireVirtualCacheView(next,exception);
608  p=GetCacheViewVirtualPixels(image_view,0,y,next->columns,1,exception);
609  if (p == (const Quantum *) NULL)
610  continue;
611  q=pixels;
612  for (x=0; x < (ssize_t) combine_image->columns; x++)
613  {
614  if (x < (ssize_t) next->columns)
615  {
616  q[i]=GetPixelGray(next,p);
617  p+=GetPixelChannels(next);
618  }
619  q+=GetPixelChannels(combine_image);
620  }
621  image_view=DestroyCacheView(image_view);
622  next=GetNextImageInList(next);
623  }
624  if (SyncCacheViewAuthenticPixels(combine_view,exception) == MagickFalse)
625  status=MagickFalse;
626  if (image->progress_monitor != (MagickProgressMonitor) NULL)
627  {
629  proceed;
630 
631  proceed=SetImageProgress(image,CombineImageTag,progress++,
632  combine_image->rows);
633  if (proceed == MagickFalse)
634  status=MagickFalse;
635  }
636  }
637  combine_view=DestroyCacheView(combine_view);
638  if (status == MagickFalse)
639  combine_image=DestroyImage(combine_image);
640  return(combine_image);
641 }
642 
643 /*
644 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
645 % %
646 % %
647 % %
648 % G e t I m a g e A l p h a C h a n n e l %
649 % %
650 % %
651 % %
652 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
653 %
654 % GetImageAlphaChannel() returns MagickFalse if the image alpha channel is
655 % not activated. That is, the image is RGB rather than RGBA or CMYK rather
656 % than CMYKA.
657 %
658 % The format of the GetImageAlphaChannel method is:
659 %
660 % MagickBooleanType GetImageAlphaChannel(const Image *image)
661 %
662 % A description of each parameter follows:
663 %
664 % o image: the image.
665 %
666 */
668 {
669  assert(image != (const Image *) NULL);
670  if (image->debug != MagickFalse)
671  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
672  assert(image->signature == MagickCoreSignature);
674 }
675 
676 /*
677 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
678 % %
679 % %
680 % %
681 % S e p a r a t e I m a g e %
682 % %
683 % %
684 % %
685 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
686 %
687 % SeparateImage() separates a channel from the image and returns it as a
688 % grayscale image.
689 %
690 % The format of the SeparateImage method is:
691 %
692 % Image *SeparateImage(const Image *image,const ChannelType channel,
693 % ExceptionInfo *exception)
694 %
695 % A description of each parameter follows:
696 %
697 % o image: the image.
698 %
699 % o channel: the image channel.
700 %
701 % o exception: return any errors or warnings in this structure.
702 %
703 */
705  const ChannelType channel_type,ExceptionInfo *exception)
706 {
707 #define GetChannelBit(mask,bit) (((size_t) (mask) >> (size_t) (bit)) & 0x01)
708 #define SeparateImageTag "Separate/Image"
709 
710  CacheView
711  *image_view,
712  *separate_view;
713 
714  Image
715  *separate_image;
716 
718  status;
719 
721  progress;
722 
723  ssize_t
724  y;
725 
726  /*
727  Initialize separate image attributes.
728  */
729  assert(image != (Image *) NULL);
730  assert(image->signature == MagickCoreSignature);
731  if (image->debug != MagickFalse)
732  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
733  assert(exception != (ExceptionInfo *) NULL);
734  assert(exception->signature == MagickCoreSignature);
735  separate_image=CloneImage(image,0,0,MagickTrue,exception);
736  if (separate_image == (Image *) NULL)
737  return((Image *) NULL);
738  if (SetImageStorageClass(separate_image,DirectClass,exception) == MagickFalse)
739  {
740  separate_image=DestroyImage(separate_image);
741  return((Image *) NULL);
742  }
743  separate_image->alpha_trait=UndefinedPixelTrait;
744  (void) SetImageColorspace(separate_image,GRAYColorspace,exception);
745  separate_image->gamma=image->gamma;
746  /*
747  Separate image.
748  */
749  status=MagickTrue;
750  progress=0;
751  image_view=AcquireVirtualCacheView(image,exception);
752  separate_view=AcquireAuthenticCacheView(separate_image,exception);
753 #if defined(MAGICKCORE_OPENMP_SUPPORT)
754  #pragma omp parallel for schedule(static) shared(progress,status) \
755  magick_number_threads(image,image,image->rows,1)
756 #endif
757  for (y=0; y < (ssize_t) image->rows; y++)
758  {
759  register const Quantum
760  *magick_restrict p;
761 
762  register Quantum
763  *magick_restrict q;
764 
765  register ssize_t
766  x;
767 
768  if (status == MagickFalse)
769  continue;
770  p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
771  q=QueueCacheViewAuthenticPixels(separate_view,0,y,separate_image->columns,1,
772  exception);
773  if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
774  {
775  status=MagickFalse;
776  continue;
777  }
778  for (x=0; x < (ssize_t) image->columns; x++)
779  {
780  register ssize_t
781  i;
782 
783  SetPixelChannel(separate_image,GrayPixelChannel,(Quantum) 0,q);
784  for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
785  {
786  PixelChannel channel = GetPixelChannelChannel(image,i);
787  PixelTrait traits = GetPixelChannelTraits(image,channel);
788  if ((traits == UndefinedPixelTrait) ||
789  (GetChannelBit(channel_type,channel) == 0))
790  continue;
791  SetPixelChannel(separate_image,GrayPixelChannel,p[i],q);
792  }
793  p+=GetPixelChannels(image);
794  q+=GetPixelChannels(separate_image);
795  }
796  if (SyncCacheViewAuthenticPixels(separate_view,exception) == MagickFalse)
797  status=MagickFalse;
798  if (image->progress_monitor != (MagickProgressMonitor) NULL)
799  {
801  proceed;
802 
803 #if defined(MAGICKCORE_OPENMP_SUPPORT)
804  #pragma omp critical (MagickCore_SeparateImage)
805 #endif
806  proceed=SetImageProgress(image,SeparateImageTag,progress++,image->rows);
807  if (proceed == MagickFalse)
808  status=MagickFalse;
809  }
810  }
811  separate_view=DestroyCacheView(separate_view);
812  image_view=DestroyCacheView(image_view);
813  (void) SetImageChannelMask(separate_image,DefaultChannels);
814  if (status == MagickFalse)
815  separate_image=DestroyImage(separate_image);
816  return(separate_image);
817 }
818 
819 /*
820 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
821 % %
822 % %
823 % %
824 % S e p a r a t e I m a g e s %
825 % %
826 % %
827 % %
828 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
829 %
830 % SeparateImages() returns a separate grayscale image for each channel
831 % specified.
832 %
833 % The format of the SeparateImages method is:
834 %
835 % Image *SeparateImages(const Image *image,ExceptionInfo *exception)
836 %
837 % A description of each parameter follows:
838 %
839 % o image: the image.
840 %
841 % o exception: return any errors or warnings in this structure.
842 %
843 */
845 {
846  Image
847  *images,
848  *separate_image;
849 
850  register ssize_t
851  i;
852 
853  assert(image != (Image *) NULL);
854  assert(image->signature == MagickCoreSignature);
855  if (image->debug != MagickFalse)
856  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
857  images=NewImageList();
858  for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
859  {
860  PixelChannel channel = GetPixelChannelChannel(image,i);
861  PixelTrait traits = GetPixelChannelTraits(image,channel);
862  if ((traits == UndefinedPixelTrait) || ((traits & UpdatePixelTrait) == 0))
863  continue;
864  separate_image=SeparateImage(image,(ChannelType) (1UL << channel),
865  exception);
866  if (separate_image != (Image *) NULL)
867  AppendImageToList(&images,separate_image);
868  }
869  if (images == (Image *) NULL)
870  images=SeparateImage(image,UndefinedChannel,exception);
871  return(images);
872 }
873 
874 /*
875 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
876 % %
877 % %
878 % %
879 % S e t I m a g e A l p h a C h a n n e l %
880 % %
881 % %
882 % %
883 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
884 %
885 % SetImageAlphaChannel() activates, deactivates, resets, or sets the alpha
886 % channel.
887 %
888 % The format of the SetImageAlphaChannel method is:
889 %
890 % MagickBooleanType SetImageAlphaChannel(Image *image,
891 % const AlphaChannelOption alpha_type,ExceptionInfo *exception)
892 %
893 % A description of each parameter follows:
894 %
895 % o image: the image.
896 %
897 % o alpha_type: The alpha channel type: ActivateAlphaChannel,
898 % AssociateAlphaChannel, CopyAlphaChannel, DeactivateAlphaChannel,
899 % DisassociateAlphaChannel, ExtractAlphaChannel, OffAlphaChannel,
900 % OnAlphaChannel, OpaqueAlphaChannel, SetAlphaChannel, ShapeAlphaChannel,
901 % and TransparentAlphaChannel.
902 %
903 % o exception: return any errors or warnings in this structure.
904 %
905 */
906 
907 static inline void FlattenPixelInfo(const Image *image,const PixelInfo *p,
908  const double alpha,const Quantum *q,const double beta,
909  Quantum *composite)
910 {
911  double
912  Da,
913  gamma,
914  Sa;
915 
916  register ssize_t
917  i;
918 
919  /*
920  Compose pixel p over pixel q with the given alpha.
921  */
922  Sa=QuantumScale*alpha;
923  Da=QuantumScale*beta,
924  gamma=Sa*(-Da)+Sa+Da;
925  gamma=PerceptibleReciprocal(gamma);
926  for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
927  {
928  PixelChannel channel = GetPixelChannelChannel(image,i);
929  PixelTrait traits = GetPixelChannelTraits(image,channel);
930  if (traits == UndefinedPixelTrait)
931  continue;
932  switch (channel)
933  {
934  case RedPixelChannel:
935  {
936  composite[i]=ClampToQuantum(gamma*MagickOver_((double) q[i],beta,
937  (double) p->red,alpha));
938  break;
939  }
940  case GreenPixelChannel:
941  {
942  composite[i]=ClampToQuantum(gamma*MagickOver_((double) q[i],beta,
943  (double) p->green,alpha));
944  break;
945  }
946  case BluePixelChannel:
947  {
948  composite[i]=ClampToQuantum(gamma*MagickOver_((double) q[i],beta,
949  (double) p->blue,alpha));
950  break;
951  }
952  case BlackPixelChannel:
953  {
954  composite[i]=ClampToQuantum(gamma*MagickOver_((double) q[i],beta,
955  (double) p->black,alpha));
956  break;
957  }
958  case AlphaPixelChannel:
959  {
960  composite[i]=ClampToQuantum(QuantumRange*(Sa*(-Da)+Sa+Da));
961  break;
962  }
963  default:
964  break;
965  }
966  }
967 }
968 
970  const AlphaChannelOption alpha_type,ExceptionInfo *exception)
971 {
972  CacheView
973  *image_view;
974 
976  status;
977 
978  ssize_t
979  y;
980 
981  assert(image != (Image *) NULL);
982  if (image->debug != MagickFalse)
983  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
984  assert(image->signature == MagickCoreSignature);
985  status=MagickTrue;
986  switch (alpha_type)
987  {
989  {
991  break;
992  }
994  {
995  /*
996  Associate alpha.
997  */
998  status=SetImageStorageClass(image,DirectClass,exception);
999  if (status == MagickFalse)
1000  break;
1001  image_view=AcquireAuthenticCacheView(image,exception);
1002 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1003  #pragma omp parallel for schedule(static) shared(status) \
1004  magick_number_threads(image,image,image->rows,1)
1005 #endif
1006  for (y=0; y < (ssize_t) image->rows; y++)
1007  {
1008  register Quantum
1009  *magick_restrict q;
1010 
1011  register ssize_t
1012  x;
1013 
1014  if (status == MagickFalse)
1015  continue;
1016  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
1017  exception);
1018  if (q == (Quantum *) NULL)
1019  {
1020  status=MagickFalse;
1021  continue;
1022  }
1023  for (x=0; x < (ssize_t) image->columns; x++)
1024  {
1025  double
1026  gamma;
1027 
1028  register ssize_t
1029  i;
1030 
1031  gamma=QuantumScale*GetPixelAlpha(image,q);
1032  for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1033  {
1034  PixelChannel channel = GetPixelChannelChannel(image,i);
1035  PixelTrait traits = GetPixelChannelTraits(image,channel);
1036  if (channel == AlphaPixelChannel)
1037  continue;
1038  if ((traits & UpdatePixelTrait) == 0)
1039  continue;
1040  q[i]=ClampToQuantum(gamma*q[i]);
1041  }
1042  q+=GetPixelChannels(image);
1043  }
1044  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1045  status=MagickFalse;
1046  }
1047  image_view=DestroyCacheView(image_view);
1048  image->alpha_trait=CopyPixelTrait;
1049  return(status);
1050  }
1052  {
1053  /*
1054  Set transparent pixels to background color.
1055  */
1056  if (image->alpha_trait == UndefinedPixelTrait)
1057  break;
1058  status=SetImageStorageClass(image,DirectClass,exception);
1059  if (status == MagickFalse)
1060  break;
1061  image_view=AcquireAuthenticCacheView(image,exception);
1062 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1063  #pragma omp parallel for schedule(static) shared(status) \
1064  magick_number_threads(image,image,image->rows,1)
1065 #endif
1066  for (y=0; y < (ssize_t) image->rows; y++)
1067  {
1068  register Quantum
1069  *magick_restrict q;
1070 
1071  register ssize_t
1072  x;
1073 
1074  if (status == MagickFalse)
1075  continue;
1076  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
1077  exception);
1078  if (q == (Quantum *) NULL)
1079  {
1080  status=MagickFalse;
1081  continue;
1082  }
1083  for (x=0; x < (ssize_t) image->columns; x++)
1084  {
1085  if (GetPixelAlpha(image,q) == TransparentAlpha)
1086  {
1087  SetPixelViaPixelInfo(image,&image->background_color,q);
1089  }
1090  q+=GetPixelChannels(image);
1091  }
1092  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1093  status=MagickFalse;
1094  }
1095  image_view=DestroyCacheView(image_view);
1096  return(status);
1097  }
1098  case CopyAlphaChannel:
1099  {
1101  status=CompositeImage(image,image,IntensityCompositeOp,MagickTrue,0,0,
1102  exception);
1103  break;
1104  }
1106  {
1107  if (image->alpha_trait == UndefinedPixelTrait)
1108  status=SetImageAlpha(image,OpaqueAlpha,exception);
1109  image->alpha_trait=CopyPixelTrait;
1110  break;
1111  }
1113  {
1114  /*
1115  Disassociate alpha.
1116  */
1117  status=SetImageStorageClass(image,DirectClass,exception);
1118  if (status == MagickFalse)
1119  break;
1121  image_view=AcquireAuthenticCacheView(image,exception);
1122 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1123  #pragma omp parallel for schedule(static) shared(status) \
1124  magick_number_threads(image,image,image->rows,1)
1125 #endif
1126  for (y=0; y < (ssize_t) image->rows; y++)
1127  {
1128  register Quantum
1129  *magick_restrict q;
1130 
1131  register ssize_t
1132  x;
1133 
1134  if (status == MagickFalse)
1135  continue;
1136  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
1137  exception);
1138  if (q == (Quantum *) NULL)
1139  {
1140  status=MagickFalse;
1141  continue;
1142  }
1143  for (x=0; x < (ssize_t) image->columns; x++)
1144  {
1145  double
1146  gamma,
1147  Sa;
1148 
1149  register ssize_t
1150  i;
1151 
1152  Sa=QuantumScale*GetPixelAlpha(image,q);
1153  gamma=PerceptibleReciprocal(Sa);
1154  for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1155  {
1156  PixelChannel channel = GetPixelChannelChannel(image,i);
1157  PixelTrait traits = GetPixelChannelTraits(image,channel);
1158  if (channel == AlphaPixelChannel)
1159  continue;
1160  if ((traits & UpdatePixelTrait) == 0)
1161  continue;
1162  q[i]=ClampToQuantum(gamma*q[i]);
1163  }
1164  q+=GetPixelChannels(image);
1165  }
1166  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1167  status=MagickFalse;
1168  }
1169  image_view=DestroyCacheView(image_view);
1171  return(status);
1172  }
1173  case DiscreteAlphaChannel:
1174  {
1175  if (image->alpha_trait == UndefinedPixelTrait)
1176  status=SetImageAlpha(image,OpaqueAlpha,exception);
1178  break;
1179  }
1180  case ExtractAlphaChannel:
1181  {
1182  status=CompositeImage(image,image,AlphaCompositeOp,MagickTrue,0,0,
1183  exception);
1185  break;
1186  }
1187  case OffAlphaChannel:
1188  {
1190  break;
1191  }
1192  case OnAlphaChannel:
1193  {
1194  if (image->alpha_trait == UndefinedPixelTrait)
1195  status=SetImageAlpha(image,OpaqueAlpha,exception);
1197  break;
1198  }
1199  case OpaqueAlphaChannel:
1200  {
1201  status=SetImageAlpha(image,OpaqueAlpha,exception);
1202  break;
1203  }
1204  case RemoveAlphaChannel:
1205  {
1206  /*
1207  Remove transparency.
1208  */
1209  if (image->alpha_trait == UndefinedPixelTrait)
1210  break;
1211  status=SetImageStorageClass(image,DirectClass,exception);
1212  if (status == MagickFalse)
1213  break;
1214  image_view=AcquireAuthenticCacheView(image,exception);
1215 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1216  #pragma omp parallel for schedule(static) shared(status) \
1217  magick_number_threads(image,image,image->rows,1)
1218 #endif
1219  for (y=0; y < (ssize_t) image->rows; y++)
1220  {
1221  register Quantum
1222  *magick_restrict q;
1223 
1224  register ssize_t
1225  x;
1226 
1227  if (status == MagickFalse)
1228  continue;
1229  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
1230  exception);
1231  if (q == (Quantum *) NULL)
1232  {
1233  status=MagickFalse;
1234  continue;
1235  }
1236  for (x=0; x < (ssize_t) image->columns; x++)
1237  {
1238  FlattenPixelInfo(image,&image->background_color,
1239  image->background_color.alpha,q,(double) GetPixelAlpha(image,q),q);
1240  q+=GetPixelChannels(image);
1241  }
1242  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1243  status=MagickFalse;
1244  }
1245  image_view=DestroyCacheView(image_view);
1247  break;
1248  }
1249  case SetAlphaChannel:
1250  {
1251  if (image->alpha_trait == UndefinedPixelTrait)
1252  status=SetImageAlpha(image,OpaqueAlpha,exception);
1253  break;
1254  }
1255  case ShapeAlphaChannel:
1256  {
1257  /*
1258  Set alpha channel by shape.
1259  */
1260  status=SetImageStorageClass(image,DirectClass,exception);
1261  if (status == MagickFalse)
1262  break;
1264  (void) SetImageMask(image,WritePixelMask,image,exception);
1265  (void) LevelImageColors(image,&image->background_color,
1266  &image->background_color,MagickTrue,exception);
1267  (void) SetImageMask(image,WritePixelMask,(Image *) NULL,exception);
1268  break;
1269  }
1271  {
1272  status=SetImageAlpha(image,TransparentAlpha,exception);
1273  break;
1274  }
1275  case UndefinedAlphaChannel:
1276  break;
1277  }
1278  if (status == MagickFalse)
1279  return(status);
1280  (void) SetPixelChannelMask(image,image->channel_mask);
1281  return(SyncImagePixelCache(image,exception));
1282 }
size_t rows
Definition: image.h:172
#define magick_restrict
Definition: MagickCore.h:41
MagickExport CacheView * DestroyCacheView(CacheView *cache_view)
Definition: cache-view.c:252
static double MagickOver_(const double p, const double alpha, const double q, const double beta)
#define TransparentAlpha
Definition: image.h:26
static MagickBooleanType SetImageProgress(const Image *image, const char *tag, const MagickOffsetType offset, const MagickSizeType extent)
#define GetChannelBit(mask, bit)
MagickProgressMonitor progress_monitor
Definition: image.h:303
static Quantum GetPixelAlpha(const Image *magick_restrict image, const Quantum *magick_restrict pixel)
PixelTrait alpha_trait
Definition: pixel.h:179
AlphaChannelOption
Definition: image.h:28
static Quantum GetPixelGray(const Image *magick_restrict image, const Quantum *magick_restrict pixel)
size_t signature
Definition: exception.h:123
ChannelFx
Definition: channel.c:108
#define CombineImageTag
#define OpaqueAlpha
Definition: image.h:25
static Quantum GetPixelChannel(const Image *magick_restrict image, const PixelChannel channel, const Quantum *magick_restrict pixel)
MagickPrivate MagickBooleanType SyncImagePixelCache(Image *, ExceptionInfo *)
Definition: cache.c:5509
MagickRealType red
Definition: pixel.h:191
MagickExport MagickBooleanType SetImageAlpha(Image *image, const Quantum alpha, ExceptionInfo *exception)
Definition: image.c:2335
static PixelTrait GetPixelChannelTraits(const Image *magick_restrict image, const PixelChannel channel)
MagickExport Image * ChannelFxImage(const Image *image, const char *expression, ExceptionInfo *exception)
Definition: channel.c:194
static void SetPixelViaPixelInfo(const Image *magick_restrict image, const PixelInfo *magick_restrict pixel_info, Quantum *magick_restrict pixel)
static MagickBooleanType IsGrayColorspace(const ColorspaceType colorspace)
MagickExport const Quantum * GetCacheViewVirtualPixels(const CacheView *cache_view, const ssize_t x, const ssize_t y, const size_t columns, const size_t rows, ExceptionInfo *exception)
Definition: cache-view.c:651
MagickRealType alpha
Definition: pixel.h:191
#define MagickEpsilon
Definition: magick-type.h:110
MagickExport MagickBooleanType CompositeImage(Image *image, const Image *composite, const CompositeOperator compose, const MagickBooleanType clip_to_self, const ssize_t x_offset, const ssize_t y_offset, ExceptionInfo *exception)
Definition: composite.c:528
MagickExport Image * CombineImages(const Image *image, const ColorspaceType colorspace, ExceptionInfo *exception)
Definition: channel.c:491
Definition: log.h:52
ssize_t MagickOffsetType
Definition: magick-type.h:129
MagickExport ssize_t ParseChannelOption(const char *channels)
Definition: option.c:2845
Definition: image.h:151
#define MagickCoreSignature
MagickExport Quantum * GetCacheViewAuthenticPixels(CacheView *cache_view, const ssize_t x, const ssize_t y, const size_t columns, const size_t rows, ExceptionInfo *exception)
Definition: cache-view.c:299
MagickExport Image * GetFirstImageInList(const Image *images)
Definition: list.c:555
MagickExport MagickBooleanType SetImageMask(Image *image, const PixelMask type, const Image *mask, ExceptionInfo *exception)
Definition: image.c:3178
MagickExport MagickBooleanType SetImageAlphaChannel(Image *image, const AlphaChannelOption alpha_type, ExceptionInfo *exception)
Definition: channel.c:969
MagickBooleanType
Definition: magick-type.h:158
MagickExport Image * NewImageList(void)
Definition: list.c:932
static double PerceptibleReciprocal(const double x)
static void FlattenPixelInfo(const Image *image, const PixelInfo *p, const double alpha, const Quantum *q, const double beta, Quantum *composite)
Definition: channel.c:907
MagickExport Image * SeparateImage(const Image *image, const ChannelType channel_type, ExceptionInfo *exception)
Definition: channel.c:704
ChannelType channel_mask
Definition: image.h:288
#define MagickPathExtent
PixelTrait alpha_trait
Definition: image.h:280
MagickRealType blue
Definition: pixel.h:191
MagickExport ChannelType SetPixelChannelMask(Image *image, const ChannelType channel_mask)
Definition: pixel.c:6276
MagickExport ChannelType SetImageChannelMask(Image *image, const ChannelType channel_mask)
Definition: image.c:2497
MagickExport Quantum * QueueCacheViewAuthenticPixels(CacheView *cache_view, const ssize_t x, const ssize_t y, const size_t columns, const size_t rows, ExceptionInfo *exception)
Definition: cache-view.c:977
MagickExport MagickBooleanType ThrowMagickException(ExceptionInfo *exception, const char *module, const char *function, const size_t line, const ExceptionType severity, const char *tag, const char *format,...)
Definition: exception.c:1064
MagickExport MagickBooleanType LogMagickEvent(const LogEventType type, const char *module, const char *function, const size_t line, const char *format,...)
Definition: log.c:1398
size_t signature
Definition: image.h:354
MagickExport MagickBooleanType LevelImageColors(Image *image, const PixelInfo *black_color, const PixelInfo *white_color, const MagickBooleanType invert, ExceptionInfo *exception)
Definition: enhance.c:2652
#define QuantumScale
Definition: magick-type.h:115
size_t columns
Definition: image.h:172
MagickBooleanType(* MagickProgressMonitor)(const char *, const MagickOffsetType, const MagickSizeType, void *)
Definition: monitor.h:26
MagickExport Image * GetLastImageInList(const Image *images)
Definition: list.c:731
ChannelType
Definition: pixel.h:33
MagickExport MagickBooleanType SetImageStorageClass(Image *image, const ClassType storage_class, ExceptionInfo *exception)
Definition: image.c:2613
MagickExport Image * DestroyImageList(Image *images)
Definition: list.c:456
PixelChannel
Definition: pixel.h:67
static size_t GetPixelChannels(const Image *magick_restrict image)
char filename[MagickPathExtent]
Definition: image.h:319
#define GetMagickModule()
Definition: log.h:28
static Quantum ClampToQuantum(const MagickRealType value)
Definition: quantum.h:84
static PixelChannel GetPixelChannelChannel(const Image *magick_restrict image, const ssize_t offset)
MagickExport CacheView * AcquireVirtualCacheView(const Image *image, ExceptionInfo *exception)
Definition: cache-view.c:149
MagickExport void GetNextToken(const char *start, const char **end, const size_t extent, char *token)
Definition: token.c:172
static double StringToDoubleInterval(const char *string, const double interval)
unsigned short Quantum
Definition: magick-type.h:82
MagickExport MagickBooleanType SetImageColorspace(Image *image, const ColorspaceType colorspace, ExceptionInfo *exception)
Definition: colorspace.c:1134
MagickExport MagickBooleanType GetImageAlphaChannel(const Image *image)
Definition: channel.c:667
ChannelType channels
Definition: image.h:366
MagickExport Image * GetNextImageInList(const Image *images)
Definition: list.c:765
MagickRealType black
Definition: pixel.h:191
#define SeparateImageTag
static void SetPixelChannel(const Image *magick_restrict image, const PixelChannel channel, const Quantum quantum, Quantum *magick_restrict pixel)
MagickExport void AppendImageToList(Image **images, const Image *append)
Definition: list.c:78
#define MagickMin(x, y)
Definition: image-private.h:27
ColorspaceType
Definition: colorspace.h:25
#define ChannelFxImageTag
MagickRealType green
Definition: pixel.h:191
MagickExport ssize_t ParsePixelChannelOption(const char *channels)
Definition: option.c:3071
#define MagickExport
MagickExport MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *magick_restrict cache_view, ExceptionInfo *exception)
Definition: cache-view.c:1100
MagickExport MagickBooleanType SetPixelMetaChannels(Image *image, const size_t number_meta_channels, ExceptionInfo *exception)
Definition: pixel.c:6360
MagickExport CacheView * AcquireAuthenticCacheView(const Image *image, ExceptionInfo *exception)
Definition: cache-view.c:112
PixelTrait
Definition: pixel.h:135
PixelInfo background_color
Definition: image.h:179
MagickExport size_t GetImageListLength(const Image *images)
Definition: list.c:690
static MagickBooleanType ChannelImage(Image *destination_image, const PixelChannel destination_channel, const ChannelFx channel_op, const Image *source_image, const PixelChannel source_channel, const Quantum pixel, ExceptionInfo *exception)
Definition: channel.c:116
MagickExport Image * SeparateImages(const Image *image, ExceptionInfo *exception)
Definition: channel.c:844
MagickExport Image * DestroyImage(Image *image)
Definition: image.c:1177
MagickExport Image * CloneImage(const Image *image, const size_t columns, const size_t rows, const MagickBooleanType detach, ExceptionInfo *exception)
Definition: image.c:794
double gamma
Definition: image.h:186
ColorspaceType colorspace
Definition: image.h:157
#define QuantumRange
Definition: magick-type.h:83
MagickBooleanType debug
Definition: image.h:334