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1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 %                                                                             %
4 %                                                                             %
5 %                                                                             %
6 %       TTTTT  RRRR    AAA   N   N  SSSSS  FFFFF   OOO   RRRR   M   M         %
7 %         T    R   R  A   A  NN  N  SS     F      O   O  R   R  MM MM         %
8 %         T    RRRR   AAAAA  N N N   SSS   FFF    O   O  RRRR   M M M         %
9 %         T    R R    A   A  N  NN     SS  F      O   O  R R    M   M         %
10 %         T    R  R   A   A  N   N  SSSSS  F       OOO   R  R   M   M         %
11 %                                                                             %
12 %                                                                             %
13 %                    MagickCore Image Transform Methods                       %
14 %                                                                             %
15 %                              Software Design                                %
16 %                                   Cristy                                    %
17 %                                 July 1992                                   %
18 %                                                                             %
19 %                                                                             %
20 %  Copyright 1999-2014 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 \f
39 /*
40   Include declarations.
41 */
42 #include "MagickCore/studio.h"
43 #include "MagickCore/attribute.h"
44 #include "MagickCore/cache.h"
45 #include "MagickCore/cache-view.h"
46 #include "MagickCore/color.h"
47 #include "MagickCore/color-private.h"
48 #include "MagickCore/colorspace-private.h"
49 #include "MagickCore/composite.h"
50 #include "MagickCore/distort.h"
51 #include "MagickCore/draw.h"
52 #include "MagickCore/effect.h"
53 #include "MagickCore/exception.h"
54 #include "MagickCore/exception-private.h"
55 #include "MagickCore/geometry.h"
56 #include "MagickCore/image.h"
57 #include "MagickCore/memory_.h"
58 #include "MagickCore/layer.h"
59 #include "MagickCore/list.h"
60 #include "MagickCore/monitor.h"
61 #include "MagickCore/monitor-private.h"
62 #include "MagickCore/pixel-accessor.h"
63 #include "MagickCore/resource_.h"
64 #include "MagickCore/resize.h"
65 #include "MagickCore/statistic.h"
66 #include "MagickCore/string_.h"
67 #include "MagickCore/thread-private.h"
68 #include "MagickCore/transform.h"
69 \f
70 /*
71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72 %                                                                             %
73 %                                                                             %
74 %                                                                             %
75 %   A u t o O r i e n t I m a g e                                             %
76 %                                                                             %
77 %                                                                             %
78 %                                                                             %
79 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
80 %
81 %  AutoOrientImage() adjusts an image so that its orientation is suitable for
82 %  viewing (i.e. top-left orientation).
83 %
84 %  The format of the AutoOrientImage method is:
85 %
86 %      Image *AutoOrientImage(const Image *image,
87 %        const OrientationType orientation,ExceptionInfo *exception)
88 %
89 %  A description of each parameter follows:
90 %
91 %    o image: The image.
92 %
93 %    o orientation: Current image orientation.
94 %
95 %    o exception: Return any errors or warnings in this structure.
96 %
97 */
98 MagickExport Image *AutoOrientImage(const Image *image,
99   const OrientationType orientation,ExceptionInfo *exception)
100 {
101   Image
102     *orient_image;
103
104   assert(image != (const Image *) NULL);
105   assert(image->signature == MagickSignature);
106   assert(exception != (ExceptionInfo *) NULL);
107   assert(exception->signature == MagickSignature);
108   orient_image=(Image *) NULL;
109   switch(orientation)
110   {
111     case UndefinedOrientation:
112     case TopLeftOrientation:
113     default:
114     {
115       orient_image=CloneImage(image,0,0,MagickTrue,exception);
116       break;
117     }
118     case TopRightOrientation:
119     {
120       orient_image=FlopImage(image,exception);
121       break;
122     }
123     case BottomRightOrientation:
124     {
125       orient_image=RotateImage(image,180.0,exception);
126       break;
127     }
128     case BottomLeftOrientation:
129     {
130       orient_image=FlipImage(image,exception);
131       break;
132     }
133     case LeftTopOrientation:
134     {
135       orient_image=TransposeImage(image,exception);
136       break;
137     }
138     case RightTopOrientation:
139     {
140       orient_image=RotateImage(image,90.0,exception);
141       break;
142     }
143     case RightBottomOrientation:
144     {
145       orient_image=TransverseImage(image,exception);
146       break;
147     }
148     case LeftBottomOrientation:
149     {
150       orient_image=RotateImage(image,270.0,exception);
151       break;
152     }
153   }
154   if (orient_image != (Image *) NULL)
155     orient_image->orientation=TopLeftOrientation;
156   return(orient_image);
157 }
158 \f
159 /*
160 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
161 %                                                                             %
162 %                                                                             %
163 %                                                                             %
164 %   C h o p I m a g e                                                         %
165 %                                                                             %
166 %                                                                             %
167 %                                                                             %
168 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
169 %
170 %  ChopImage() removes a region of an image and collapses the image to occupy
171 %  the removed portion.
172 %
173 %  The format of the ChopImage method is:
174 %
175 %      Image *ChopImage(const Image *image,const RectangleInfo *chop_info)
176 %        ExceptionInfo *exception)
177 %
178 %  A description of each parameter follows:
179 %
180 %    o image: the image.
181 %
182 %    o chop_info: Define the region of the image to chop.
183 %
184 %    o exception: return any errors or warnings in this structure.
185 %
186 */
187 MagickExport Image *ChopImage(const Image *image,const RectangleInfo *chop_info,
188   ExceptionInfo *exception)
189 {
190 #define ChopImageTag  "Chop/Image"
191
192   CacheView
193     *chop_view,
194     *image_view;
195
196   Image
197     *chop_image;
198
199   MagickBooleanType
200     status;
201
202   MagickOffsetType
203     progress;
204
205   RectangleInfo
206     extent;
207
208   ssize_t
209     y;
210
211   /*
212     Check chop geometry.
213   */
214   assert(image != (const Image *) NULL);
215   assert(image->signature == MagickSignature);
216   if (image->debug != MagickFalse)
217     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
218   assert(exception != (ExceptionInfo *) NULL);
219   assert(exception->signature == MagickSignature);
220   assert(chop_info != (RectangleInfo *) NULL);
221   if (((chop_info->x+(ssize_t) chop_info->width) < 0) ||
222       ((chop_info->y+(ssize_t) chop_info->height) < 0) ||
223       (chop_info->x > (ssize_t) image->columns) ||
224       (chop_info->y > (ssize_t) image->rows))
225     ThrowImageException(OptionWarning,"GeometryDoesNotContainImage");
226   extent=(*chop_info);
227   if ((extent.x+(ssize_t) extent.width) > (ssize_t) image->columns)
228     extent.width=(size_t) ((ssize_t) image->columns-extent.x);
229   if ((extent.y+(ssize_t) extent.height) > (ssize_t) image->rows)
230     extent.height=(size_t) ((ssize_t) image->rows-extent.y);
231   if (extent.x < 0)
232     {
233       extent.width-=(size_t) (-extent.x);
234       extent.x=0;
235     }
236   if (extent.y < 0)
237     {
238       extent.height-=(size_t) (-extent.y);
239       extent.y=0;
240     }
241   chop_image=CloneImage(image,image->columns-extent.width,image->rows-
242     extent.height,MagickTrue,exception);
243   if (chop_image == (Image *) NULL)
244     return((Image *) NULL);
245   /*
246     Extract chop image.
247   */
248   status=MagickTrue;
249   progress=0;
250   image_view=AcquireVirtualCacheView(image,exception);
251   chop_view=AcquireAuthenticCacheView(chop_image,exception);
252 #if defined(MAGICKCORE_OPENMP_SUPPORT)
253   #pragma omp parallel for schedule(static,4) shared(status) \
254     magick_threads(image,chop_image,1,1)
255 #endif
256   for (y=0; y < (ssize_t) extent.y; y++)
257   {
258     register const Quantum
259       *restrict p;
260
261     register ssize_t
262       x;
263
264     register Quantum
265       *restrict q;
266
267     if (status == MagickFalse)
268       continue;
269     p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
270     q=QueueCacheViewAuthenticPixels(chop_view,0,y,chop_image->columns,1,
271       exception);
272     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
273       {
274         status=MagickFalse;
275         continue;
276       }
277     for (x=0; x < (ssize_t) image->columns; x++)
278     {
279       if ((x < extent.x) || (x >= (ssize_t) (extent.x+extent.width)))
280         {
281           register ssize_t
282             i;
283
284           for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
285           {
286             PixelChannel channel=GetPixelChannelChannel(image,i);
287             PixelTrait traits=GetPixelChannelTraits(image,channel);
288             PixelTrait chop_traits=GetPixelChannelTraits(chop_image,channel);
289             if ((traits == UndefinedPixelTrait) ||
290                 (chop_traits == UndefinedPixelTrait))
291               continue;
292             SetPixelChannel(chop_image,channel,p[i],q);
293           }
294           q+=GetPixelChannels(chop_image);
295         }
296       p+=GetPixelChannels(image);
297     }
298     if (SyncCacheViewAuthenticPixels(chop_view,exception) == MagickFalse)
299       status=MagickFalse;
300     if (image->progress_monitor != (MagickProgressMonitor) NULL)
301       {
302         MagickBooleanType
303           proceed;
304
305 #if defined(MAGICKCORE_OPENMP_SUPPORT)
306         #pragma omp critical (MagickCore_ChopImage)
307 #endif
308         proceed=SetImageProgress(image,ChopImageTag,progress++,image->rows);
309         if (proceed == MagickFalse)
310           status=MagickFalse;
311       }
312   }
313   /*
314     Extract chop image.
315   */
316 #if defined(MAGICKCORE_OPENMP_SUPPORT)
317   #pragma omp parallel for schedule(static,4) shared(progress,status) \
318     magick_threads(image,chop_image,1,1)
319 #endif
320   for (y=0; y < (ssize_t) (image->rows-(extent.y+extent.height)); y++)
321   {
322     register const Quantum
323       *restrict p;
324
325     register ssize_t
326       x;
327
328     register Quantum
329       *restrict q;
330
331     if (status == MagickFalse)
332       continue;
333     p=GetCacheViewVirtualPixels(image_view,0,extent.y+extent.height+y,
334       image->columns,1,exception);
335     q=QueueCacheViewAuthenticPixels(chop_view,0,extent.y+y,chop_image->columns,
336       1,exception);
337     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
338       {
339         status=MagickFalse;
340         continue;
341       }
342     for (x=0; x < (ssize_t) image->columns; x++)
343     {
344       if ((x < extent.x) || (x >= (ssize_t) (extent.x+extent.width)))
345         {
346           register ssize_t
347             i;
348
349           for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
350           {
351             PixelChannel channel=GetPixelChannelChannel(image,i);
352             PixelTrait traits=GetPixelChannelTraits(image,channel);
353             PixelTrait chop_traits=GetPixelChannelTraits(chop_image,channel);
354             if ((traits == UndefinedPixelTrait) ||
355                 (chop_traits == UndefinedPixelTrait))
356               continue;
357             SetPixelChannel(chop_image,channel,p[i],q);
358           }
359           q+=GetPixelChannels(chop_image);
360         }
361       p+=GetPixelChannels(image);
362     }
363     if (SyncCacheViewAuthenticPixels(chop_view,exception) == MagickFalse)
364       status=MagickFalse;
365     if (image->progress_monitor != (MagickProgressMonitor) NULL)
366       {
367         MagickBooleanType
368           proceed;
369
370 #if defined(MAGICKCORE_OPENMP_SUPPORT)
371         #pragma omp critical (MagickCore_ChopImage)
372 #endif
373         proceed=SetImageProgress(image,ChopImageTag,progress++,image->rows);
374         if (proceed == MagickFalse)
375           status=MagickFalse;
376       }
377   }
378   chop_view=DestroyCacheView(chop_view);
379   image_view=DestroyCacheView(image_view);
380   chop_image->type=image->type;
381   if (status == MagickFalse)
382     chop_image=DestroyImage(chop_image);
383   return(chop_image);
384 }
385 \f
386 /*
387 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
388 %                                                                             %
389 %                                                                             %
390 %                                                                             %
391 +     C o n s o l i d a t e C M Y K I m a g e                                 %
392 %                                                                             %
393 %                                                                             %
394 %                                                                             %
395 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
396 %
397 %  ConsolidateCMYKImage() consolidates separate C, M, Y, and K planes into a
398 %  single image.
399 %
400 %  The format of the ConsolidateCMYKImage method is:
401 %
402 %      Image *ConsolidateCMYKImage(const Image *image,ExceptionInfo *exception)
403 %
404 %  A description of each parameter follows:
405 %
406 %    o image: the image sequence.
407 %
408 %    o exception: return any errors or warnings in this structure.
409 %
410 */
411 MagickExport Image *ConsolidateCMYKImages(const Image *images,
412   ExceptionInfo *exception)
413 {
414   CacheView
415     *cmyk_view,
416     *image_view;
417
418   Image
419     *cmyk_image,
420     *cmyk_images;
421
422   register ssize_t
423     j;
424
425   ssize_t
426     y;
427
428   /*
429     Consolidate separate C, M, Y, and K planes into a single image.
430   */
431   assert(images != (Image *) NULL);
432   assert(images->signature == MagickSignature);
433   if (images->debug != MagickFalse)
434     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",images->filename);
435   assert(exception != (ExceptionInfo *) NULL);
436   assert(exception->signature == MagickSignature);
437   cmyk_images=NewImageList();
438   for (j=0; j < (ssize_t) GetImageListLength(images); j+=4)
439   {
440     register ssize_t
441       i;
442
443     assert(images != (Image *) NULL);
444     cmyk_image=CloneImage(images,images->columns,images->rows,MagickTrue,
445       exception);
446     if (cmyk_image == (Image *) NULL)
447       break;
448     if (SetImageStorageClass(cmyk_image,DirectClass,exception) == MagickFalse)
449       break;
450     (void) SetImageColorspace(cmyk_image,CMYKColorspace,exception);
451     for (i=0; i < 4; i++)
452     {
453       image_view=AcquireVirtualCacheView(images,exception);
454       cmyk_view=AcquireAuthenticCacheView(cmyk_image,exception);
455       for (y=0; y < (ssize_t) images->rows; y++)
456       {
457         register const Quantum
458           *restrict p;
459
460         register ssize_t
461           x;
462
463         register Quantum
464           *restrict q;
465
466         p=GetCacheViewVirtualPixels(image_view,0,y,images->columns,1,exception);
467         q=QueueCacheViewAuthenticPixels(cmyk_view,0,y,cmyk_image->columns,1,
468           exception);
469         if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
470           break;
471         for (x=0; x < (ssize_t) images->columns; x++)
472         {
473           Quantum
474             pixel;
475
476           pixel=QuantumRange-GetPixelIntensity(images,p);
477           switch (i)
478           {
479             case 0: SetPixelCyan(cmyk_image,pixel,q);  break;
480             case 1: SetPixelMagenta(cmyk_image,pixel,q);  break;
481             case 2: SetPixelYellow(cmyk_image,pixel,q);  break;
482             case 3: SetPixelBlack(cmyk_image,pixel,q);  break;
483             default: break;
484           }
485           p+=GetPixelChannels(images);
486           q+=GetPixelChannels(cmyk_image);
487         }
488         if (SyncCacheViewAuthenticPixels(cmyk_view,exception) == MagickFalse)
489           break;
490       }
491       cmyk_view=DestroyCacheView(cmyk_view);
492       image_view=DestroyCacheView(image_view);
493       images=GetNextImageInList(images);
494       if (images == (Image *) NULL)
495         break;
496     }
497     AppendImageToList(&cmyk_images,cmyk_image);
498   }
499   return(cmyk_images);
500 }
501 \f
502 /*
503 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
504 %                                                                             %
505 %                                                                             %
506 %                                                                             %
507 %   C r o p I m a g e                                                         %
508 %                                                                             %
509 %                                                                             %
510 %                                                                             %
511 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
512 %
513 %  CropImage() extracts a region of the image starting at the offset defined
514 %  by geometry.  Region must be fully defined, and no special handling of
515 %  geometry flags is performed.
516 %
517 %  The format of the CropImage method is:
518 %
519 %      Image *CropImage(const Image *image,const RectangleInfo *geometry,
520 %        ExceptionInfo *exception)
521 %
522 %  A description of each parameter follows:
523 %
524 %    o image: the image.
525 %
526 %    o geometry: Define the region of the image to crop with members
527 %      x, y, width, and height.
528 %
529 %    o exception: return any errors or warnings in this structure.
530 %
531 */
532 MagickExport Image *CropImage(const Image *image,const RectangleInfo *geometry,
533   ExceptionInfo *exception)
534 {
535 #define CropImageTag  "Crop/Image"
536
537   CacheView
538     *crop_view,
539     *image_view;
540
541   Image
542     *crop_image;
543
544   MagickBooleanType
545     status;
546
547   MagickOffsetType
548     progress;
549
550   OffsetInfo
551     offset;
552
553   RectangleInfo
554     bounding_box,
555     page;
556
557   ssize_t
558     y;
559
560   /*
561     Check crop geometry.
562   */
563   assert(image != (const Image *) NULL);
564   assert(image->signature == MagickSignature);
565   if (image->debug != MagickFalse)
566     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
567   assert(geometry != (const RectangleInfo *) NULL);
568   assert(exception != (ExceptionInfo *) NULL);
569   assert(exception->signature == MagickSignature);
570   bounding_box=image->page;
571   if ((bounding_box.width == 0) || (bounding_box.height == 0))
572     {
573       bounding_box.width=image->columns;
574       bounding_box.height=image->rows;
575     }
576   page=(*geometry);
577   if (page.width == 0)
578     page.width=bounding_box.width;
579   if (page.height == 0)
580     page.height=bounding_box.height;
581   if (((bounding_box.x-page.x) >= (ssize_t) page.width) ||
582       ((bounding_box.y-page.y) >= (ssize_t) page.height) ||
583       ((page.x-bounding_box.x) > (ssize_t) image->columns) ||
584       ((page.y-bounding_box.y) > (ssize_t) image->rows))
585     {
586       /*
587         Crop is not within virtual canvas, return 1 pixel transparent image.
588       */
589       (void) ThrowMagickException(exception,GetMagickModule(),OptionWarning,
590         "GeometryDoesNotContainImage","`%s'",image->filename);
591       crop_image=CloneImage(image,1,1,MagickTrue,exception);
592       if (crop_image == (Image *) NULL)
593         return((Image *) NULL);
594       crop_image->background_color.alpha=(Quantum) TransparentAlpha;
595       crop_image->alpha_trait=BlendPixelTrait;
596       (void) SetImageBackgroundColor(crop_image,exception);
597       crop_image->page=bounding_box;
598       crop_image->page.x=(-1);
599       crop_image->page.y=(-1);
600       if (crop_image->dispose == BackgroundDispose)
601         crop_image->dispose=NoneDispose;
602       return(crop_image);
603     }
604   if ((page.x < 0) && (bounding_box.x >= 0))
605     {
606       page.width+=page.x-bounding_box.x;
607       page.x=0;
608     }
609   else
610     {
611       page.width-=bounding_box.x-page.x;
612       page.x-=bounding_box.x;
613       if (page.x < 0)
614         page.x=0;
615     }
616   if ((page.y < 0) && (bounding_box.y >= 0))
617     {
618       page.height+=page.y-bounding_box.y;
619       page.y=0;
620     }
621   else
622     {
623       page.height-=bounding_box.y-page.y;
624       page.y-=bounding_box.y;
625       if (page.y < 0)
626         page.y=0;
627     }
628   if ((page.x+(ssize_t) page.width) > (ssize_t) image->columns)
629     page.width=image->columns-page.x;
630   if ((geometry->width != 0) && (page.width > geometry->width))
631     page.width=geometry->width;
632   if ((page.y+(ssize_t) page.height) > (ssize_t) image->rows)
633     page.height=image->rows-page.y;
634   if ((geometry->height != 0) && (page.height > geometry->height))
635     page.height=geometry->height;
636   bounding_box.x+=page.x;
637   bounding_box.y+=page.y;
638   if ((page.width == 0) || (page.height == 0))
639     {
640       (void) ThrowMagickException(exception,GetMagickModule(),OptionWarning,
641         "GeometryDoesNotContainImage","`%s'",image->filename);
642       return((Image *) NULL);
643     }
644   /*
645     Initialize crop image attributes.
646   */
647   crop_image=CloneImage(image,page.width,page.height,MagickTrue,exception);
648   if (crop_image == (Image *) NULL)
649     return((Image *) NULL);
650   crop_image->page.width=image->page.width;
651   crop_image->page.height=image->page.height;
652   offset.x=(ssize_t) (bounding_box.x+bounding_box.width);
653   offset.y=(ssize_t) (bounding_box.y+bounding_box.height);
654   if ((offset.x > (ssize_t) image->page.width) ||
655       (offset.y > (ssize_t) image->page.height))
656     {
657       crop_image->page.width=bounding_box.width;
658       crop_image->page.height=bounding_box.height;
659     }
660   crop_image->page.x=bounding_box.x;
661   crop_image->page.y=bounding_box.y;
662   /*
663     Crop image.
664   */
665   status=MagickTrue;
666   progress=0;
667   image_view=AcquireVirtualCacheView(image,exception);
668   crop_view=AcquireAuthenticCacheView(crop_image,exception);
669 #if defined(MAGICKCORE_OPENMP_SUPPORT)
670   #pragma omp parallel for schedule(static,4) shared(status) \
671     magick_threads(image,crop_image,1,1)
672 #endif
673   for (y=0; y < (ssize_t) crop_image->rows; y++)
674   {
675     register const Quantum
676       *restrict p;
677
678     register Quantum
679       *restrict q;
680
681     register ssize_t
682       x;
683
684     if (status == MagickFalse)
685       continue;
686     p=GetCacheViewVirtualPixels(image_view,page.x,page.y+y,crop_image->columns,
687       1,exception);
688     q=QueueCacheViewAuthenticPixels(crop_view,0,y,crop_image->columns,1,
689       exception);
690     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
691       {
692         status=MagickFalse;
693         continue;
694       }
695     for (x=0; x < (ssize_t) crop_image->columns; x++)
696     {
697       register ssize_t
698         i;
699
700       if (GetPixelReadMask(image,p) == 0)
701         {
702           SetPixelBackgoundColor(crop_image,q);
703           p+=GetPixelChannels(image);
704           q+=GetPixelChannels(crop_image);
705           continue;
706         }
707       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
708       {
709         PixelChannel channel=GetPixelChannelChannel(image,i);
710         PixelTrait traits=GetPixelChannelTraits(image,channel);
711         PixelTrait crop_traits=GetPixelChannelTraits(crop_image,channel);
712         if ((traits == UndefinedPixelTrait) ||
713             (crop_traits == UndefinedPixelTrait))
714           continue;
715         SetPixelChannel(crop_image,channel,p[i],q);
716       }
717       p+=GetPixelChannels(image);
718       q+=GetPixelChannels(crop_image);
719     }
720     if (SyncCacheViewAuthenticPixels(crop_view,exception) == MagickFalse)
721       status=MagickFalse;
722     if (image->progress_monitor != (MagickProgressMonitor) NULL)
723       {
724         MagickBooleanType
725           proceed;
726
727 #if defined(MAGICKCORE_OPENMP_SUPPORT)
728         #pragma omp critical (MagickCore_CropImage)
729 #endif
730         proceed=SetImageProgress(image,CropImageTag,progress++,image->rows);
731         if (proceed == MagickFalse)
732           status=MagickFalse;
733       }
734   }
735   crop_view=DestroyCacheView(crop_view);
736   image_view=DestroyCacheView(image_view);
737   crop_image->type=image->type;
738   if (status == MagickFalse)
739     crop_image=DestroyImage(crop_image);
740   return(crop_image);
741 }
742 \f
743 /*
744 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
745 %                                                                             %
746 %                                                                             %
747 %                                                                             %
748 %   C r o p I m a g e T o T i l e s                                           %
749 %                                                                             %
750 %                                                                             %
751 %                                                                             %
752 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
753 %
754 %  CropImageToTiles() crops a single image, into a possible list of tiles.
755 %  This may include a single sub-region of the image.  This basically applies
756 %  all the normal geometry flags for Crop.
757 %
758 %      Image *CropImageToTiles(const Image *image,
759 %         const RectangleInfo *crop_geometry, ExceptionInfo *exception)
760 %
761 %  A description of each parameter follows:
762 %
763 %    o image: the image The transformed image is returned as this parameter.
764 %
765 %    o crop_geometry: A crop geometry string.
766 %
767 %    o exception: return any errors or warnings in this structure.
768 %
769 */
770
771 static inline double MagickRound(double x)
772 {
773   /*
774     Round the fraction to nearest integer.
775   */
776   if ((x-floor(x)) < (ceil(x)-x))
777     return(floor(x));
778   return(ceil(x));
779 }
780
781 MagickExport Image *CropImageToTiles(const Image *image,
782   const char *crop_geometry,ExceptionInfo *exception)
783 {
784   Image
785     *next,
786     *crop_image;
787
788   MagickStatusType
789     flags;
790
791   RectangleInfo
792     geometry;
793
794   assert(image != (Image *) NULL);
795   assert(image->signature == MagickSignature);
796   if (image->debug != MagickFalse)
797     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
798   crop_image=NewImageList();
799   next=NewImageList();
800   flags=ParseGravityGeometry(image,crop_geometry,&geometry,exception);
801   if ((flags & AreaValue) != 0)
802     {
803       PointInfo
804         delta,
805         offset;
806
807       RectangleInfo
808         crop;
809
810       size_t
811         height,
812         width;
813
814       /*
815         Crop into NxM tiles (@ flag).
816       */
817       width=image->columns;
818       height=image->rows;
819       if (geometry.width == 0)
820         geometry.width=1;
821       if (geometry.height == 0)
822         geometry.height=1;
823       if ((flags & AspectValue) == 0)
824         {
825           width-=(geometry.x < 0 ? -1 : 1)*geometry.x;
826           height-=(geometry.y < 0 ? -1 : 1)*geometry.y;
827         }
828       else
829         {
830           width+=(geometry.x < 0 ? -1 : 1)*geometry.x;
831           height+=(geometry.y < 0 ? -1 : 1)*geometry.y;
832         }
833       delta.x=(double) width/geometry.width;
834       delta.y=(double) height/geometry.height;
835       if (delta.x < 1.0)
836         delta.x=1.0;
837       if (delta.y < 1.0)
838         delta.y=1.0;
839       for (offset.y=0; offset.y < (double) height; )
840       {
841         if ((flags & AspectValue) == 0)
842           {
843             crop.y=(ssize_t) MagickRound((double) (offset.y-
844               (geometry.y > 0 ? 0 : geometry.y)));
845             offset.y+=delta.y;   /* increment now to find width */
846             crop.height=(size_t) MagickRound((double) (offset.y+
847               (geometry.y < 0 ? 0 : geometry.y)));
848           }
849         else
850           {
851             crop.y=(ssize_t) MagickRound((double) (offset.y-
852               (geometry.y > 0 ? geometry.y : 0)));
853             offset.y+=delta.y;  /* increment now to find width */
854             crop.height=(size_t) MagickRound((double)
855               (offset.y+(geometry.y < -1 ? geometry.y : 0)));
856           }
857         crop.height-=crop.y;
858         crop.y+=image->page.y;
859         for (offset.x=0; offset.x < (double) width; )
860         {
861           if ((flags & AspectValue) == 0)
862             {
863               crop.x=(ssize_t) MagickRound((double) (offset.x-
864                 (geometry.x > 0 ? 0 : geometry.x)));
865               offset.x+=delta.x;  /* increment now to find height */
866               crop.width=(size_t) MagickRound((double) (offset.x+
867                 (geometry.x < 0 ? 0 : geometry.x)));
868             }
869           else
870             {
871               crop.x=(ssize_t) MagickRound((double) (offset.x-
872                 (geometry.x > 0 ? geometry.x : 0)));
873               offset.x+=delta.x;  /* increment now to find height */
874               crop.width=(size_t) MagickRound((double) (offset.x+
875                 (geometry.x < 0 ? geometry.x : 0)));
876             }
877           crop.width-=crop.x;
878           crop.x+=image->page.x;
879           next=CropImage(image,&crop,exception);
880           if (next == (Image *) NULL)
881             break;
882           AppendImageToList(&crop_image,next);
883         }
884         if (next == (Image *) NULL)
885           break;
886       }
887       ClearMagickException(exception);
888       return(crop_image);
889     }
890   if (((geometry.width == 0) && (geometry.height == 0)) ||
891       ((flags & XValue) != 0) || ((flags & YValue) != 0))
892     {
893       /*
894         Crop a single region at +X+Y.
895       */
896       crop_image=CropImage(image,&geometry,exception);
897       if ((crop_image != (Image *) NULL) && ((flags & AspectValue) != 0))
898         {
899           crop_image->page.width=geometry.width;
900           crop_image->page.height=geometry.height;
901           crop_image->page.x-=geometry.x;
902           crop_image->page.y-=geometry.y;
903         }
904       return(crop_image);
905     }
906   if ((image->columns > geometry.width) || (image->rows > geometry.height))
907     {
908       RectangleInfo
909         page;
910
911       size_t
912         height,
913         width;
914
915       ssize_t
916         x,
917         y;
918
919       /*
920         Crop into tiles of fixed size WxH.
921       */
922       page=image->page;
923       if (page.width == 0)
924         page.width=image->columns;
925       if (page.height == 0)
926         page.height=image->rows;
927       width=geometry.width;
928       if (width == 0)
929         width=page.width;
930       height=geometry.height;
931       if (height == 0)
932         height=page.height;
933       next=NewImageList();
934       for (y=0; y < (ssize_t) page.height; y+=(ssize_t) height)
935       {
936         for (x=0; x < (ssize_t) page.width; x+=(ssize_t) width)
937         {
938           geometry.width=width;
939           geometry.height=height;
940           geometry.x=x;
941           geometry.y=y;
942           next=CropImage(image,&geometry,exception);
943           if (next == (Image *) NULL)
944             break;
945           AppendImageToList(&crop_image,next);
946         }
947         if (next == (Image *) NULL)
948           break;
949       }
950       return(crop_image);
951     }
952   return(CloneImage(image,0,0,MagickTrue,exception));
953 }
954 \f
955 /*
956 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
957 %                                                                             %
958 %                                                                             %
959 %                                                                             %
960 %   E x c e r p t I m a g e                                                   %
961 %                                                                             %
962 %                                                                             %
963 %                                                                             %
964 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
965 %
966 %  ExcerptImage() returns a excerpt of the image as defined by the geometry.
967 %
968 %  The format of the ExcerptImage method is:
969 %
970 %      Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
971 %        ExceptionInfo *exception)
972 %
973 %  A description of each parameter follows:
974 %
975 %    o image: the image.
976 %
977 %    o geometry: Define the region of the image to extend with members
978 %      x, y, width, and height.
979 %
980 %    o exception: return any errors or warnings in this structure.
981 %
982 */
983 MagickExport Image *ExcerptImage(const Image *image,
984   const RectangleInfo *geometry,ExceptionInfo *exception)
985 {
986 #define ExcerptImageTag  "Excerpt/Image"
987
988   CacheView
989     *excerpt_view,
990     *image_view;
991
992   Image
993     *excerpt_image;
994
995   MagickBooleanType
996     status;
997
998   MagickOffsetType
999     progress;
1000
1001   ssize_t
1002     y;
1003
1004   /*
1005     Allocate excerpt image.
1006   */
1007   assert(image != (const Image *) NULL);
1008   assert(image->signature == MagickSignature);
1009   if (image->debug != MagickFalse)
1010     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1011   assert(geometry != (const RectangleInfo *) NULL);
1012   assert(exception != (ExceptionInfo *) NULL);
1013   assert(exception->signature == MagickSignature);
1014   excerpt_image=CloneImage(image,geometry->width,geometry->height,MagickTrue,
1015     exception);
1016   if (excerpt_image == (Image *) NULL)
1017     return((Image *) NULL);
1018   /*
1019     Excerpt each row.
1020   */
1021   status=MagickTrue;
1022   progress=0;
1023   image_view=AcquireVirtualCacheView(image,exception);
1024   excerpt_view=AcquireAuthenticCacheView(excerpt_image,exception);
1025 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1026   #pragma omp parallel for schedule(static,4) shared(progress,status) \
1027     magick_threads(image,excerpt_image,excerpt_image->rows,1)
1028 #endif
1029   for (y=0; y < (ssize_t) excerpt_image->rows; y++)
1030   {
1031     register const Quantum
1032       *restrict p;
1033
1034     register Quantum
1035       *restrict q;
1036
1037     register ssize_t
1038       x;
1039
1040     if (status == MagickFalse)
1041       continue;
1042     p=GetCacheViewVirtualPixels(image_view,geometry->x,geometry->y+y,
1043       geometry->width,1,exception);
1044     q=GetCacheViewAuthenticPixels(excerpt_view,0,y,excerpt_image->columns,1,
1045       exception);
1046     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1047       {
1048         status=MagickFalse;
1049         continue;
1050       }
1051     for (x=0; x < (ssize_t) excerpt_image->columns; x++)
1052     {
1053       register ssize_t
1054         i;
1055
1056       if (GetPixelReadMask(image,p) == 0)
1057         {
1058           SetPixelBackgoundColor(excerpt_image,q);
1059           p+=GetPixelChannels(image);
1060           q+=GetPixelChannels(excerpt_image);
1061           continue;
1062         }
1063       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1064       {
1065         PixelChannel channel=GetPixelChannelChannel(image,i);
1066         PixelTrait traits=GetPixelChannelTraits(image,channel);
1067         PixelTrait excerpt_traits=GetPixelChannelTraits(excerpt_image,channel);
1068         if ((traits == UndefinedPixelTrait) ||
1069             (excerpt_traits == UndefinedPixelTrait))
1070           continue;
1071         SetPixelChannel(excerpt_image,channel,p[i],q);
1072       }
1073       p+=GetPixelChannels(image);
1074       q+=GetPixelChannels(excerpt_image);
1075     }
1076     if (SyncCacheViewAuthenticPixels(excerpt_view,exception) == MagickFalse)
1077       status=MagickFalse;
1078     if (image->progress_monitor != (MagickProgressMonitor) NULL)
1079       {
1080         MagickBooleanType
1081           proceed;
1082
1083 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1084         #pragma omp critical (MagickCore_ExcerptImage)
1085 #endif
1086         proceed=SetImageProgress(image,ExcerptImageTag,progress++,image->rows);
1087         if (proceed == MagickFalse)
1088           status=MagickFalse;
1089       }
1090   }
1091   excerpt_view=DestroyCacheView(excerpt_view);
1092   image_view=DestroyCacheView(image_view);
1093   excerpt_image->type=image->type;
1094   if (status == MagickFalse)
1095     excerpt_image=DestroyImage(excerpt_image);
1096   return(excerpt_image);
1097 }
1098 \f
1099 /*
1100 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1101 %                                                                             %
1102 %                                                                             %
1103 %                                                                             %
1104 %   E x t e n t I m a g e                                                     %
1105 %                                                                             %
1106 %                                                                             %
1107 %                                                                             %
1108 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1109 %
1110 %  ExtentImage() extends the image as defined by the geometry, gravity, and
1111 %  image background color.  Set the (x,y) offset of the geometry to move the
1112 %  original image relative to the extended image.
1113 %
1114 %  The format of the ExtentImage method is:
1115 %
1116 %      Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
1117 %        ExceptionInfo *exception)
1118 %
1119 %  A description of each parameter follows:
1120 %
1121 %    o image: the image.
1122 %
1123 %    o geometry: Define the region of the image to extend with members
1124 %      x, y, width, and height.
1125 %
1126 %    o exception: return any errors or warnings in this structure.
1127 %
1128 */
1129 MagickExport Image *ExtentImage(const Image *image,
1130   const RectangleInfo *geometry,ExceptionInfo *exception)
1131 {
1132   Image
1133     *extent_image;
1134
1135   /*
1136     Allocate extent image.
1137   */
1138   assert(image != (const Image *) NULL);
1139   assert(image->signature == MagickSignature);
1140   if (image->debug != MagickFalse)
1141     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1142   assert(geometry != (const RectangleInfo *) NULL);
1143   assert(exception != (ExceptionInfo *) NULL);
1144   assert(exception->signature == MagickSignature);
1145   extent_image=CloneImage(image,geometry->width,geometry->height,MagickTrue,
1146     exception);
1147   if (extent_image == (Image *) NULL)
1148     return((Image *) NULL);
1149   (void) SetImageBackgroundColor(extent_image,exception);
1150   (void) CompositeImage(extent_image,image,image->compose,MagickTrue,
1151     -geometry->x,-geometry->y,exception);
1152   return(extent_image);
1153 }
1154 \f
1155 /*
1156 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1157 %                                                                             %
1158 %                                                                             %
1159 %                                                                             %
1160 %   F l i p I m a g e                                                         %
1161 %                                                                             %
1162 %                                                                             %
1163 %                                                                             %
1164 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1165 %
1166 %  FlipImage() creates a vertical mirror image by reflecting the pixels
1167 %  around the central x-axis.
1168 %
1169 %  The format of the FlipImage method is:
1170 %
1171 %      Image *FlipImage(const Image *image,ExceptionInfo *exception)
1172 %
1173 %  A description of each parameter follows:
1174 %
1175 %    o image: the image.
1176 %
1177 %    o exception: return any errors or warnings in this structure.
1178 %
1179 */
1180 MagickExport Image *FlipImage(const Image *image,ExceptionInfo *exception)
1181 {
1182 #define FlipImageTag  "Flip/Image"
1183
1184   CacheView
1185     *flip_view,
1186     *image_view;
1187
1188   Image
1189     *flip_image;
1190
1191   MagickBooleanType
1192     status;
1193
1194   MagickOffsetType
1195     progress;
1196
1197   RectangleInfo
1198     page;
1199
1200   ssize_t
1201     y;
1202
1203   assert(image != (const Image *) NULL);
1204   assert(image->signature == MagickSignature);
1205   if (image->debug != MagickFalse)
1206     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1207   assert(exception != (ExceptionInfo *) NULL);
1208   assert(exception->signature == MagickSignature);
1209   flip_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
1210   if (flip_image == (Image *) NULL)
1211     return((Image *) NULL);
1212   /*
1213     Flip image.
1214   */
1215   status=MagickTrue;
1216   progress=0;
1217   page=image->page;
1218   image_view=AcquireVirtualCacheView(image,exception);
1219   flip_view=AcquireAuthenticCacheView(flip_image,exception);
1220 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1221   #pragma omp parallel for schedule(static,4) shared(status) \
1222     magick_threads(image,flip_image,1,1)
1223 #endif
1224   for (y=0; y < (ssize_t) flip_image->rows; y++)
1225   {
1226     register const Quantum
1227       *restrict p;
1228
1229     register Quantum
1230       *restrict q;
1231
1232     register ssize_t
1233       x;
1234
1235     if (status == MagickFalse)
1236       continue;
1237     p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
1238     q=QueueCacheViewAuthenticPixels(flip_view,0,(ssize_t) (flip_image->rows-y-
1239       1),flip_image->columns,1,exception);
1240     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1241       {
1242         status=MagickFalse;
1243         continue;
1244       }
1245     for (x=0; x < (ssize_t) flip_image->columns; x++)
1246     {
1247       register ssize_t
1248         i;
1249
1250       if (GetPixelReadMask(image,p) == 0)
1251         {
1252           SetPixelBackgoundColor(flip_image,q);
1253           p+=GetPixelChannels(image);
1254           q+=GetPixelChannels(flip_image);
1255           continue;
1256         }
1257       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1258       {
1259         PixelChannel channel=GetPixelChannelChannel(image,i);
1260         PixelTrait traits=GetPixelChannelTraits(image,channel);
1261         PixelTrait flip_traits=GetPixelChannelTraits(flip_image,channel);
1262         if ((traits == UndefinedPixelTrait) ||
1263             (flip_traits == UndefinedPixelTrait))
1264           continue;
1265         SetPixelChannel(flip_image,channel,p[i],q);
1266       }
1267       p+=GetPixelChannels(image);
1268       q+=GetPixelChannels(flip_image);
1269     }
1270     if (SyncCacheViewAuthenticPixels(flip_view,exception) == MagickFalse)
1271       status=MagickFalse;
1272     if (image->progress_monitor != (MagickProgressMonitor) NULL)
1273       {
1274         MagickBooleanType
1275           proceed;
1276
1277 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1278         #pragma omp critical (MagickCore_FlipImage)
1279 #endif
1280         proceed=SetImageProgress(image,FlipImageTag,progress++,image->rows);
1281         if (proceed == MagickFalse)
1282           status=MagickFalse;
1283       }
1284   }
1285   flip_view=DestroyCacheView(flip_view);
1286   image_view=DestroyCacheView(image_view);
1287   flip_image->type=image->type;
1288   if (page.height != 0)
1289     page.y=(ssize_t) (page.height-flip_image->rows-page.y);
1290   flip_image->page=page;
1291   if (status == MagickFalse)
1292     flip_image=DestroyImage(flip_image);
1293   return(flip_image);
1294 }
1295 \f
1296 /*
1297 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1298 %                                                                             %
1299 %                                                                             %
1300 %                                                                             %
1301 %   F l o p I m a g e                                                         %
1302 %                                                                             %
1303 %                                                                             %
1304 %                                                                             %
1305 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1306 %
1307 %  FlopImage() creates a horizontal mirror image by reflecting the pixels
1308 %  around the central y-axis.
1309 %
1310 %  The format of the FlopImage method is:
1311 %
1312 %      Image *FlopImage(const Image *image,ExceptionInfo *exception)
1313 %
1314 %  A description of each parameter follows:
1315 %
1316 %    o image: the image.
1317 %
1318 %    o exception: return any errors or warnings in this structure.
1319 %
1320 */
1321 MagickExport Image *FlopImage(const Image *image,ExceptionInfo *exception)
1322 {
1323 #define FlopImageTag  "Flop/Image"
1324
1325   CacheView
1326     *flop_view,
1327     *image_view;
1328
1329   Image
1330     *flop_image;
1331
1332   MagickBooleanType
1333     status;
1334
1335   MagickOffsetType
1336     progress;
1337
1338   RectangleInfo
1339     page;
1340
1341   ssize_t
1342     y;
1343
1344   assert(image != (const Image *) NULL);
1345   assert(image->signature == MagickSignature);
1346   if (image->debug != MagickFalse)
1347     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1348   assert(exception != (ExceptionInfo *) NULL);
1349   assert(exception->signature == MagickSignature);
1350   flop_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
1351   if (flop_image == (Image *) NULL)
1352     return((Image *) NULL);
1353   /*
1354     Flop each row.
1355   */
1356   status=MagickTrue;
1357   progress=0;
1358   page=image->page;
1359   image_view=AcquireVirtualCacheView(image,exception);
1360   flop_view=AcquireAuthenticCacheView(flop_image,exception);
1361 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1362   #pragma omp parallel for schedule(static,4) shared(status) \
1363     magick_threads(image,flop_image,1,1)
1364 #endif
1365   for (y=0; y < (ssize_t) flop_image->rows; y++)
1366   {
1367     register const Quantum
1368       *restrict p;
1369
1370     register ssize_t
1371       x;
1372
1373     register Quantum
1374       *restrict q;
1375
1376     if (status == MagickFalse)
1377       continue;
1378     p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
1379     q=QueueCacheViewAuthenticPixels(flop_view,0,y,flop_image->columns,1,
1380       exception);
1381     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1382       {
1383         status=MagickFalse;
1384         continue;
1385       }
1386     q+=GetPixelChannels(flop_image)*flop_image->columns;
1387     for (x=0; x < (ssize_t) flop_image->columns; x++)
1388     {
1389       register ssize_t
1390         i;
1391
1392       q-=GetPixelChannels(flop_image);
1393       if (GetPixelReadMask(image,p) == 0)
1394         {
1395           p+=GetPixelChannels(image);
1396           continue;
1397         }
1398       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1399       {
1400         PixelChannel channel=GetPixelChannelChannel(image,i);
1401         PixelTrait traits=GetPixelChannelTraits(image,channel);
1402         PixelTrait flop_traits=GetPixelChannelTraits(flop_image,channel);
1403         if ((traits == UndefinedPixelTrait) ||
1404             (flop_traits == UndefinedPixelTrait))
1405           continue;
1406         SetPixelChannel(flop_image,channel,p[i],q);
1407       }
1408       p+=GetPixelChannels(image);
1409     }
1410     if (SyncCacheViewAuthenticPixels(flop_view,exception) == MagickFalse)
1411       status=MagickFalse;
1412     if (image->progress_monitor != (MagickProgressMonitor) NULL)
1413       {
1414         MagickBooleanType
1415           proceed;
1416
1417 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1418         #pragma omp critical (MagickCore_FlopImage)
1419 #endif
1420         proceed=SetImageProgress(image,FlopImageTag,progress++,image->rows);
1421         if (proceed == MagickFalse)
1422           status=MagickFalse;
1423       }
1424   }
1425   flop_view=DestroyCacheView(flop_view);
1426   image_view=DestroyCacheView(image_view);
1427   flop_image->type=image->type;
1428   if (page.width != 0)
1429     page.x=(ssize_t) (page.width-flop_image->columns-page.x);
1430   flop_image->page=page;
1431   if (status == MagickFalse)
1432     flop_image=DestroyImage(flop_image);
1433   return(flop_image);
1434 }
1435 \f
1436 /*
1437 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1438 %                                                                             %
1439 %                                                                             %
1440 %                                                                             %
1441 %   R o l l I m a g e                                                         %
1442 %                                                                             %
1443 %                                                                             %
1444 %                                                                             %
1445 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1446 %
1447 %  RollImage() offsets an image as defined by x_offset and y_offset.
1448 %
1449 %  The format of the RollImage method is:
1450 %
1451 %      Image *RollImage(const Image *image,const ssize_t x_offset,
1452 %        const ssize_t y_offset,ExceptionInfo *exception)
1453 %
1454 %  A description of each parameter follows:
1455 %
1456 %    o image: the image.
1457 %
1458 %    o x_offset: the number of columns to roll in the horizontal direction.
1459 %
1460 %    o y_offset: the number of rows to roll in the vertical direction.
1461 %
1462 %    o exception: return any errors or warnings in this structure.
1463 %
1464 */
1465
1466 static inline MagickBooleanType CopyImageRegion(Image *destination,
1467   const Image *source,const size_t columns,const size_t rows,
1468   const ssize_t sx,const ssize_t sy,const ssize_t dx,const ssize_t dy,
1469   ExceptionInfo *exception)
1470 {
1471   CacheView
1472     *source_view,
1473     *destination_view;
1474
1475   MagickBooleanType
1476     status;
1477
1478   ssize_t
1479     y;
1480
1481   if (columns == 0)
1482     return(MagickTrue);
1483   status=MagickTrue;
1484   source_view=AcquireVirtualCacheView(source,exception);
1485   destination_view=AcquireAuthenticCacheView(destination,exception);
1486 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1487   #pragma omp parallel for schedule(static,4) shared(status) \
1488     magick_threads(source,destination,rows,1)
1489 #endif
1490   for (y=0; y < (ssize_t) rows; y++)
1491   {
1492     MagickBooleanType
1493       sync;
1494
1495     register const Quantum
1496       *restrict p;
1497
1498     register Quantum
1499       *restrict q;
1500
1501     register ssize_t
1502       x;
1503
1504     /*
1505       Transfer scanline.
1506     */
1507     if (status == MagickFalse)
1508       continue;
1509     p=GetCacheViewVirtualPixels(source_view,sx,sy+y,columns,1,exception);
1510     q=GetCacheViewAuthenticPixels(destination_view,dx,dy+y,columns,1,exception);
1511     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1512       {
1513         status=MagickFalse;
1514         continue;
1515       }
1516     for (x=0; x < (ssize_t) columns; x++)
1517     {
1518       register ssize_t
1519         i;
1520
1521       if (GetPixelReadMask(source,p) == 0)
1522         {
1523           SetPixelBackgoundColor(destination,q);
1524           p+=GetPixelChannels(source);
1525           q+=GetPixelChannels(destination);
1526           continue;
1527         }
1528       for (i=0; i < (ssize_t) GetPixelChannels(source); i++)
1529       {
1530         PixelChannel channel=GetPixelChannelChannel(source,i);
1531         PixelTrait source_traits=GetPixelChannelTraits(source,channel);
1532         PixelTrait destination_traits=GetPixelChannelTraits(destination,
1533           channel);
1534         if ((source_traits == UndefinedPixelTrait) ||
1535             (destination_traits == UndefinedPixelTrait))
1536           continue;
1537         SetPixelChannel(destination,channel,p[i],q);
1538       }
1539       p+=GetPixelChannels(source);
1540       q+=GetPixelChannels(destination);
1541     }
1542     sync=SyncCacheViewAuthenticPixels(destination_view,exception);
1543     if (sync == MagickFalse)
1544       status=MagickFalse;
1545   }
1546   destination_view=DestroyCacheView(destination_view);
1547   source_view=DestroyCacheView(source_view);
1548   return(status);
1549 }
1550
1551 MagickExport Image *RollImage(const Image *image,const ssize_t x_offset,
1552   const ssize_t y_offset,ExceptionInfo *exception)
1553 {
1554 #define RollImageTag  "Roll/Image"
1555
1556   Image
1557     *roll_image;
1558
1559   MagickStatusType
1560     status;
1561
1562   RectangleInfo
1563     offset;
1564
1565   /*
1566     Initialize roll image attributes.
1567   */
1568   assert(image != (const Image *) NULL);
1569   assert(image->signature == MagickSignature);
1570   if (image->debug != MagickFalse)
1571     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1572   assert(exception != (ExceptionInfo *) NULL);
1573   assert(exception->signature == MagickSignature);
1574   roll_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
1575   if (roll_image == (Image *) NULL)
1576     return((Image *) NULL);
1577   offset.x=x_offset;
1578   offset.y=y_offset;
1579   while (offset.x < 0)
1580     offset.x+=(ssize_t) image->columns;
1581   while (offset.x >= (ssize_t) image->columns)
1582     offset.x-=(ssize_t) image->columns;
1583   while (offset.y < 0)
1584     offset.y+=(ssize_t) image->rows;
1585   while (offset.y >= (ssize_t) image->rows)
1586     offset.y-=(ssize_t) image->rows;
1587   /*
1588     Roll image.
1589   */
1590   status=CopyImageRegion(roll_image,image,(size_t) offset.x,
1591     (size_t) offset.y,(ssize_t) image->columns-offset.x,(ssize_t) image->rows-
1592     offset.y,0,0,exception);
1593   (void) SetImageProgress(image,RollImageTag,0,3);
1594   status&=CopyImageRegion(roll_image,image,image->columns-offset.x,
1595     (size_t) offset.y,0,(ssize_t) image->rows-offset.y,offset.x,0,
1596     exception);
1597   (void) SetImageProgress(image,RollImageTag,1,3);
1598   status&=CopyImageRegion(roll_image,image,(size_t) offset.x,image->rows-
1599     offset.y,(ssize_t) image->columns-offset.x,0,0,offset.y,exception);
1600   (void) SetImageProgress(image,RollImageTag,2,3);
1601   status&=CopyImageRegion(roll_image,image,image->columns-offset.x,image->rows-
1602     offset.y,0,0,offset.x,offset.y,exception);
1603   (void) SetImageProgress(image,RollImageTag,3,3);
1604   roll_image->type=image->type;
1605   if (status == MagickFalse)
1606     roll_image=DestroyImage(roll_image);
1607   return(roll_image);
1608 }
1609 \f
1610 /*
1611 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1612 %                                                                             %
1613 %                                                                             %
1614 %                                                                             %
1615 %   S h a v e I m a g e                                                       %
1616 %                                                                             %
1617 %                                                                             %
1618 %                                                                             %
1619 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1620 %
1621 %  ShaveImage() shaves pixels from the image edges.  It allocates the memory
1622 %  necessary for the new Image structure and returns a pointer to the new
1623 %  image.
1624 %
1625 %  The format of the ShaveImage method is:
1626 %
1627 %      Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
1628 %        ExceptionInfo *exception)
1629 %
1630 %  A description of each parameter follows:
1631 %
1632 %    o shave_image: Method ShaveImage returns a pointer to the shaved
1633 %      image.  A null image is returned if there is a memory shortage or
1634 %      if the image width or height is zero.
1635 %
1636 %    o image: the image.
1637 %
1638 %    o shave_info: Specifies a pointer to a RectangleInfo which defines the
1639 %      region of the image to crop.
1640 %
1641 %    o exception: return any errors or warnings in this structure.
1642 %
1643 */
1644 MagickExport Image *ShaveImage(const Image *image,
1645   const RectangleInfo *shave_info,ExceptionInfo *exception)
1646 {
1647   Image
1648     *shave_image;
1649
1650   RectangleInfo
1651     geometry;
1652
1653   assert(image != (const Image *) NULL);
1654   assert(image->signature == MagickSignature);
1655   if (image->debug != MagickFalse)
1656     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1657   if (((2*shave_info->width) >= image->columns) ||
1658       ((2*shave_info->height) >= image->rows))
1659     ThrowImageException(OptionWarning,"GeometryDoesNotContainImage");
1660   SetGeometry(image,&geometry);
1661   geometry.width-=2*shave_info->width;
1662   geometry.height-=2*shave_info->height;
1663   geometry.x=(ssize_t) shave_info->width+image->page.x;
1664   geometry.y=(ssize_t) shave_info->height+image->page.y;
1665   shave_image=CropImage(image,&geometry,exception);
1666   if (shave_image == (Image *) NULL)
1667     return((Image *) NULL);
1668   shave_image->page.width-=2*shave_info->width;
1669   shave_image->page.height-=2*shave_info->height;
1670   shave_image->page.x-=(ssize_t) shave_info->width;
1671   shave_image->page.y-=(ssize_t) shave_info->height;
1672   return(shave_image);
1673 }
1674 \f
1675 /*
1676 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1677 %                                                                             %
1678 %                                                                             %
1679 %                                                                             %
1680 %   S p l i c e I m a g e                                                     %
1681 %                                                                             %
1682 %                                                                             %
1683 %                                                                             %
1684 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1685 %
1686 %  SpliceImage() splices a solid color into the image as defined by the
1687 %  geometry.
1688 %
1689 %  The format of the SpliceImage method is:
1690 %
1691 %      Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
1692 %        ExceptionInfo *exception)
1693 %
1694 %  A description of each parameter follows:
1695 %
1696 %    o image: the image.
1697 %
1698 %    o geometry: Define the region of the image to splice with members
1699 %      x, y, width, and height.
1700 %
1701 %    o exception: return any errors or warnings in this structure.
1702 %
1703 */
1704 MagickExport Image *SpliceImage(const Image *image,
1705   const RectangleInfo *geometry,ExceptionInfo *exception)
1706 {
1707 #define SpliceImageTag  "Splice/Image"
1708
1709   CacheView
1710     *image_view,
1711     *splice_view;
1712
1713   Image
1714     *splice_image;
1715
1716   MagickBooleanType
1717     status;
1718
1719   MagickOffsetType
1720     progress;
1721
1722   RectangleInfo
1723     splice_geometry;
1724
1725   ssize_t
1726     y;
1727
1728   /*
1729     Allocate splice image.
1730   */
1731   assert(image != (const Image *) NULL);
1732   assert(image->signature == MagickSignature);
1733   if (image->debug != MagickFalse)
1734     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1735   assert(geometry != (const RectangleInfo *) NULL);
1736   assert(exception != (ExceptionInfo *) NULL);
1737   assert(exception->signature == MagickSignature);
1738   splice_geometry=(*geometry);
1739   splice_image=CloneImage(image,image->columns+splice_geometry.width,
1740     image->rows+splice_geometry.height,MagickTrue,exception);
1741   if (splice_image == (Image *) NULL)
1742     return((Image *) NULL);
1743   if (SetImageStorageClass(splice_image,DirectClass,exception) == MagickFalse)
1744     {
1745       splice_image=DestroyImage(splice_image);
1746       return((Image *) NULL);
1747     }
1748   if ((IsPixelInfoGray(&splice_image->background_color) == MagickFalse) &&
1749       (IsGrayColorspace(splice_image->colorspace) != MagickFalse))
1750     (void) SetImageColorspace(splice_image,sRGBColorspace,exception);
1751   if ((splice_image->background_color.alpha_trait == BlendPixelTrait) &&
1752       (splice_image->alpha_trait != BlendPixelTrait))
1753     (void) SetImageAlpha(splice_image,OpaqueAlpha,exception);
1754   (void) SetImageBackgroundColor(splice_image,exception);
1755   /*
1756     Respect image geometry.
1757   */
1758   switch (image->gravity)
1759   {
1760     default:
1761     case UndefinedGravity:
1762     case NorthWestGravity:
1763       break;
1764     case NorthGravity:
1765     {
1766       splice_geometry.x+=(ssize_t) splice_geometry.width/2;
1767       break;
1768     }
1769     case NorthEastGravity:
1770     {
1771       splice_geometry.x+=(ssize_t) splice_geometry.width;
1772       break;
1773     }
1774     case WestGravity:
1775     {
1776       splice_geometry.y+=(ssize_t) splice_geometry.width/2;
1777       break;
1778     }
1779     case CenterGravity:
1780     {
1781       splice_geometry.x+=(ssize_t) splice_geometry.width/2;
1782       splice_geometry.y+=(ssize_t) splice_geometry.height/2;
1783       break;
1784     }
1785     case EastGravity:
1786     {
1787       splice_geometry.x+=(ssize_t) splice_geometry.width;
1788       splice_geometry.y+=(ssize_t) splice_geometry.height/2;
1789       break;
1790     }
1791     case SouthWestGravity:
1792     {
1793       splice_geometry.y+=(ssize_t) splice_geometry.height;
1794       break;
1795     }
1796     case SouthGravity:
1797     {
1798       splice_geometry.x+=(ssize_t) splice_geometry.width/2;
1799       splice_geometry.y+=(ssize_t) splice_geometry.height;
1800       break;
1801     }
1802     case SouthEastGravity:
1803     {
1804       splice_geometry.x+=(ssize_t) splice_geometry.width;
1805       splice_geometry.y+=(ssize_t) splice_geometry.height;
1806       break;
1807     }
1808   }
1809   /*
1810     Splice image.
1811   */
1812   status=MagickTrue;
1813   progress=0;
1814   image_view=AcquireVirtualCacheView(image,exception);
1815   splice_view=AcquireAuthenticCacheView(splice_image,exception);
1816 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1817   #pragma omp parallel for schedule(static,4) shared(progress,status) \
1818     magick_threads(image,splice_image,1,1)
1819 #endif
1820   for (y=0; y < (ssize_t) splice_geometry.y; y++)
1821   {
1822     register const Quantum
1823       *restrict p;
1824
1825     register ssize_t
1826       x;
1827
1828     register Quantum
1829       *restrict q;
1830
1831     if (status == MagickFalse)
1832       continue;
1833     p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
1834     q=QueueCacheViewAuthenticPixels(splice_view,0,y,splice_image->columns,1,
1835       exception);
1836     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1837       {
1838         status=MagickFalse;
1839         continue;
1840       }
1841     for (x=0; x < splice_geometry.x; x++)
1842     {
1843       register ssize_t
1844         i;
1845
1846       if (GetPixelReadMask(image,p) == 0)
1847         {
1848           SetPixelBackgoundColor(splice_image,q);
1849           p+=GetPixelChannels(image);
1850           q+=GetPixelChannels(splice_image);
1851           continue;
1852         }
1853       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1854       {
1855         PixelChannel channel=GetPixelChannelChannel(image,i);
1856         PixelTrait traits=GetPixelChannelTraits(image,channel);
1857         PixelTrait splice_traits=GetPixelChannelTraits(splice_image,channel);
1858         if ((traits == UndefinedPixelTrait) ||
1859             (splice_traits == UndefinedPixelTrait))
1860           continue;
1861         SetPixelChannel(splice_image,channel,p[i],q);
1862       }
1863       SetPixelRed(splice_image,GetPixelRed(image,p),q);
1864       SetPixelGreen(splice_image,GetPixelGreen(image,p),q);
1865       SetPixelBlue(splice_image,GetPixelBlue(image,p),q);
1866       SetPixelAlpha(splice_image,GetPixelAlpha(image,p),q);
1867       p+=GetPixelChannels(image);
1868       q+=GetPixelChannels(splice_image);
1869     }
1870     for ( ; x < (ssize_t) (splice_geometry.x+splice_geometry.width); x++)
1871       q+=GetPixelChannels(splice_image);
1872     for ( ; x < (ssize_t) splice_image->columns; x++)
1873     {
1874       register ssize_t
1875         i;
1876
1877       if (GetPixelReadMask(image,p) == 0)
1878         {
1879           SetPixelBackgoundColor(splice_image,q);
1880           p+=GetPixelChannels(image);
1881           q+=GetPixelChannels(splice_image);
1882           continue;
1883         }
1884       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1885       {
1886         PixelChannel channel=GetPixelChannelChannel(image,i);
1887         PixelTrait traits=GetPixelChannelTraits(image,channel);
1888         PixelTrait splice_traits=GetPixelChannelTraits(splice_image,channel);
1889         if ((traits == UndefinedPixelTrait) ||
1890             (splice_traits == UndefinedPixelTrait))
1891           continue;
1892         SetPixelChannel(splice_image,channel,p[i],q);
1893       }
1894       SetPixelRed(splice_image,GetPixelRed(image,p),q);
1895       SetPixelGreen(splice_image,GetPixelGreen(image,p),q);
1896       SetPixelBlue(splice_image,GetPixelBlue(image,p),q);
1897       SetPixelAlpha(splice_image,GetPixelAlpha(image,p),q);
1898       p+=GetPixelChannels(image);
1899       q+=GetPixelChannels(splice_image);
1900     }
1901     if (SyncCacheViewAuthenticPixels(splice_view,exception) == MagickFalse)
1902       status=MagickFalse;
1903     if (image->progress_monitor != (MagickProgressMonitor) NULL)
1904       {
1905         MagickBooleanType
1906           proceed;
1907
1908 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1909         #pragma omp critical (MagickCore_TransposeImage)
1910 #endif
1911         proceed=SetImageProgress(image,SpliceImageTag,progress++,
1912           splice_image->rows);
1913         if (proceed == MagickFalse)
1914           status=MagickFalse;
1915       }
1916   }
1917 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1918   #pragma omp parallel for schedule(static,4) shared(progress,status) \
1919     magick_threads(image,splice_image,1,1)
1920 #endif
1921   for (y=(ssize_t) (splice_geometry.y+splice_geometry.height);
1922        y < (ssize_t) splice_image->rows; y++)
1923   {
1924     register const Quantum
1925       *restrict p;
1926
1927     register ssize_t
1928       x;
1929
1930     register Quantum
1931       *restrict q;
1932
1933     if (status == MagickFalse)
1934       continue;
1935     p=GetCacheViewVirtualPixels(image_view,0,y-(ssize_t) splice_geometry.height,
1936       image->columns,1,exception);
1937     if ((y < 0) || (y >= (ssize_t) splice_image->rows))
1938       continue;
1939     q=QueueCacheViewAuthenticPixels(splice_view,0,y,splice_image->columns,1,
1940       exception);
1941     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1942       {
1943         status=MagickFalse;
1944         continue;
1945       }
1946     for (x=0; x < splice_geometry.x; x++)
1947     {
1948       register ssize_t
1949         i;
1950
1951       if (GetPixelReadMask(image,q) == 0)
1952         {
1953           SetPixelBackgoundColor(splice_image,q);
1954           p+=GetPixelChannels(image);
1955           q+=GetPixelChannels(splice_image);
1956           continue;
1957         }
1958       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1959       {
1960         PixelChannel channel=GetPixelChannelChannel(image,i);
1961         PixelTrait traits=GetPixelChannelTraits(image,channel);
1962         PixelTrait splice_traits=GetPixelChannelTraits(splice_image,channel);
1963         if ((traits == UndefinedPixelTrait) ||
1964             (splice_traits == UndefinedPixelTrait))
1965           continue;
1966         SetPixelChannel(splice_image,channel,p[i],q);
1967       }
1968       SetPixelRed(splice_image,GetPixelRed(image,p),q);
1969       SetPixelGreen(splice_image,GetPixelGreen(image,p),q);
1970       SetPixelBlue(splice_image,GetPixelBlue(image,p),q);
1971       SetPixelAlpha(splice_image,GetPixelAlpha(image,p),q);
1972       p+=GetPixelChannels(image);
1973       q+=GetPixelChannels(splice_image);
1974     }
1975     for ( ; x < (ssize_t) (splice_geometry.x+splice_geometry.width); x++)
1976       q+=GetPixelChannels(splice_image);
1977     for ( ; x < (ssize_t) splice_image->columns; x++)
1978     {
1979       register ssize_t
1980         i;
1981
1982       if (GetPixelReadMask(image,q) == 0)
1983         {
1984           SetPixelBackgoundColor(splice_image,q);
1985           p+=GetPixelChannels(image);
1986           q+=GetPixelChannels(splice_image);
1987           continue;
1988         }
1989       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1990       {
1991         PixelChannel channel=GetPixelChannelChannel(image,i);
1992         PixelTrait traits=GetPixelChannelTraits(image,channel);
1993         PixelTrait splice_traits=GetPixelChannelTraits(splice_image,channel);
1994         if ((traits == UndefinedPixelTrait) ||
1995             (splice_traits == UndefinedPixelTrait))
1996           continue;
1997         SetPixelChannel(splice_image,channel,p[i],q);
1998       }
1999       SetPixelRed(splice_image,GetPixelRed(image,p),q);
2000       SetPixelGreen(splice_image,GetPixelGreen(image,p),q);
2001       SetPixelBlue(splice_image,GetPixelBlue(image,p),q);
2002       SetPixelAlpha(splice_image,GetPixelAlpha(image,p),q);
2003       p+=GetPixelChannels(image);
2004       q+=GetPixelChannels(splice_image);
2005     }
2006     if (SyncCacheViewAuthenticPixels(splice_view,exception) == MagickFalse)
2007       status=MagickFalse;
2008     if (image->progress_monitor != (MagickProgressMonitor) NULL)
2009       {
2010         MagickBooleanType
2011           proceed;
2012
2013 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2014         #pragma omp critical (MagickCore_TransposeImage)
2015 #endif
2016         proceed=SetImageProgress(image,SpliceImageTag,progress++,
2017           splice_image->rows);
2018         if (proceed == MagickFalse)
2019           status=MagickFalse;
2020       }
2021   }
2022   splice_view=DestroyCacheView(splice_view);
2023   image_view=DestroyCacheView(image_view);
2024   if (status == MagickFalse)
2025     splice_image=DestroyImage(splice_image);
2026   return(splice_image);
2027 }
2028 \f
2029 /*
2030 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2031 %                                                                             %
2032 %                                                                             %
2033 %                                                                             %
2034 %   T r a n s f o r m I m a g e                                               %
2035 %                                                                             %
2036 %                                                                             %
2037 %                                                                             %
2038 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2039 %
2040 %  TransformImage() is a convenience method that behaves like ResizeImage() or
2041 %  CropImage() but accepts scaling and/or cropping information as a region
2042 %  geometry specification.  If the operation fails, the original image handle
2043 %  is left as is.
2044 %
2045 %  This should only be used for single images.
2046 %
2047 %  This function destroys what it assumes to be a single image list.
2048 %  If the input image is part of a larger list, all other images in that list
2049 %  will be simply 'lost', not destroyed.
2050 %
2051 %  Also if the crop generates a list of images only the first image is resized.
2052 %  And finally if the crop succeeds and the resize failed, you will get a
2053 %  cropped image, as well as a 'false' or 'failed' report.
2054 %
2055 %  This function and should probably be deprecated in favor of direct calls
2056 %  to CropImageToTiles() or ResizeImage(), as appropriate.
2057 %
2058 %  The format of the TransformImage method is:
2059 %
2060 %      MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
2061 %        const char *image_geometry,ExceptionInfo *exception)
2062 %
2063 %  A description of each parameter follows:
2064 %
2065 %    o image: the image The transformed image is returned as this parameter.
2066 %
2067 %    o crop_geometry: A crop geometry string.  This geometry defines a
2068 %      subregion of the image to crop.
2069 %
2070 %    o image_geometry: An image geometry string.  This geometry defines the
2071 %      final size of the image.
2072 %
2073 %    o exception: return any errors or warnings in this structure.
2074 %
2075 */
2076 MagickExport MagickBooleanType TransformImage(Image **image,
2077   const char *crop_geometry,const char *image_geometry,ExceptionInfo *exception)
2078 {
2079   Image
2080     *resize_image,
2081     *transform_image;
2082
2083   MagickStatusType
2084     flags;
2085
2086   RectangleInfo
2087     geometry;
2088
2089   assert(image != (Image **) NULL);
2090   assert((*image)->signature == MagickSignature);
2091   if ((*image)->debug != MagickFalse)
2092     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",(*image)->filename);
2093   transform_image=(*image);
2094   if (crop_geometry != (const char *) NULL)
2095     {
2096       Image
2097         *crop_image;
2098
2099       /*
2100         Crop image to a user specified size.
2101       */
2102       crop_image=CropImageToTiles(*image,crop_geometry,exception);
2103       if (crop_image == (Image *) NULL)
2104         transform_image=CloneImage(*image,0,0,MagickTrue,exception);
2105       else
2106         {
2107           transform_image=DestroyImage(transform_image);
2108           transform_image=GetFirstImageInList(crop_image);
2109         }
2110       *image=transform_image;
2111     }
2112   if (image_geometry == (const char *) NULL)
2113     return(MagickTrue);
2114
2115   /*
2116     Scale image to a user specified size.
2117   */
2118   flags=ParseRegionGeometry(transform_image,image_geometry,&geometry,exception);
2119   (void) flags;
2120   if ((transform_image->columns == geometry.width) &&
2121       (transform_image->rows == geometry.height))
2122     return(MagickTrue);
2123   resize_image=ResizeImage(transform_image,geometry.width,geometry.height,
2124     transform_image->filter,exception);
2125   if (resize_image == (Image *) NULL)
2126     return(MagickFalse);
2127   transform_image=DestroyImage(transform_image);
2128   transform_image=resize_image;
2129   *image=transform_image;
2130   return(MagickTrue);
2131 }
2132 \f
2133 /*
2134 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2135 %                                                                             %
2136 %                                                                             %
2137 %                                                                             %
2138 %   T r a n s f o r m I m a g e s                                             %
2139 %                                                                             %
2140 %                                                                             %
2141 %                                                                             %
2142 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2143 %
2144 %  TransformImages() calls TransformImage() on each image of a sequence.
2145 %
2146 %  The format of the TransformImage method is:
2147 %
2148 %      MagickBooleanType TransformImages(Image **image,
2149 %        const char *crop_geometry,const char *image_geometry,
2150 %        ExceptionInfo *exception)
2151 %
2152 %  A description of each parameter follows:
2153 %
2154 %    o image: the image The transformed image is returned as this parameter.
2155 %
2156 %    o crop_geometry: A crop geometry string.  This geometry defines a
2157 %      subregion of the image to crop.
2158 %
2159 %    o image_geometry: An image geometry string.  This geometry defines the
2160 %      final size of the image.
2161 %
2162 %    o exception: return any errors or warnings in this structure.
2163 %
2164 */
2165 MagickExport MagickBooleanType TransformImages(Image **images,
2166   const char *crop_geometry,const char *image_geometry,ExceptionInfo *exception)
2167 {
2168   Image
2169     *image,
2170     **image_list,
2171     *transform_images;
2172
2173   MagickStatusType
2174     status;
2175
2176   register ssize_t
2177     i;
2178
2179   assert(images != (Image **) NULL);
2180   assert((*images)->signature == MagickSignature);
2181   if ((*images)->debug != MagickFalse)
2182     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
2183       (*images)->filename);
2184   image_list=ImageListToArray(*images,exception);
2185   if (image_list == (Image **) NULL)
2186     return(MagickFalse);
2187   status=MagickTrue;
2188   transform_images=NewImageList();
2189   for (i=0; image_list[i] != (Image *) NULL; i++)
2190   {
2191     image=image_list[i];
2192     status&=TransformImage(&image,crop_geometry,image_geometry,exception);
2193     AppendImageToList(&transform_images,image);
2194   }
2195   *images=transform_images;
2196   image_list=(Image **) RelinquishMagickMemory(image_list);
2197   return(status != 0 ? MagickTrue : MagickFalse);
2198 }
2199 \f
2200 /*
2201 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2202 %                                                                             %
2203 %                                                                             %
2204 %                                                                             %
2205 %   T r a n s p o s e I m a g e                                               %
2206 %                                                                             %
2207 %                                                                             %
2208 %                                                                             %
2209 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2210 %
2211 %  TransposeImage() creates a horizontal mirror image by reflecting the pixels
2212 %  around the central y-axis while rotating them by 90 degrees.
2213 %
2214 %  The format of the TransposeImage method is:
2215 %
2216 %      Image *TransposeImage(const Image *image,ExceptionInfo *exception)
2217 %
2218 %  A description of each parameter follows:
2219 %
2220 %    o image: the image.
2221 %
2222 %    o exception: return any errors or warnings in this structure.
2223 %
2224 */
2225 MagickExport Image *TransposeImage(const Image *image,ExceptionInfo *exception)
2226 {
2227 #define TransposeImageTag  "Transpose/Image"
2228
2229   CacheView
2230     *image_view,
2231     *transpose_view;
2232
2233   Image
2234     *transpose_image;
2235
2236   MagickBooleanType
2237     status;
2238
2239   MagickOffsetType
2240     progress;
2241
2242   RectangleInfo
2243     page;
2244
2245   ssize_t
2246     y;
2247
2248   assert(image != (const Image *) NULL);
2249   assert(image->signature == MagickSignature);
2250   if (image->debug != MagickFalse)
2251     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2252   assert(exception != (ExceptionInfo *) NULL);
2253   assert(exception->signature == MagickSignature);
2254   transpose_image=CloneImage(image,image->rows,image->columns,MagickTrue,
2255     exception);
2256   if (transpose_image == (Image *) NULL)
2257     return((Image *) NULL);
2258   /*
2259     Transpose image.
2260   */
2261   status=MagickTrue;
2262   progress=0;
2263   image_view=AcquireVirtualCacheView(image,exception);
2264   transpose_view=AcquireAuthenticCacheView(transpose_image,exception);
2265 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2266   #pragma omp parallel for schedule(static,4) shared(progress,status) \
2267     magick_threads(image,transpose_image,image->rows,1)
2268 #endif
2269   for (y=0; y < (ssize_t) image->rows; y++)
2270   {
2271     register const Quantum
2272       *restrict p;
2273
2274     register Quantum
2275       *restrict q;
2276
2277     register ssize_t
2278       x;
2279
2280     if (status == MagickFalse)
2281       continue;
2282     p=GetCacheViewVirtualPixels(image_view,0,(ssize_t) image->rows-y-1,
2283       image->columns,1,exception);
2284     q=QueueCacheViewAuthenticPixels(transpose_view,(ssize_t) (image->rows-y-1),
2285       0,1,transpose_image->rows,exception);
2286     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
2287       {
2288         status=MagickFalse;
2289         continue;
2290       }
2291     for (x=0; x < (ssize_t) image->columns; x++)
2292     {
2293       register ssize_t
2294         i;
2295
2296       if (GetPixelReadMask(image,q) == 0)
2297         {
2298           SetPixelBackgoundColor(transpose_image,q);
2299           p+=GetPixelChannels(image);
2300           q+=GetPixelChannels(transpose_image);
2301           continue;
2302         }
2303       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
2304       {
2305         PixelChannel channel=GetPixelChannelChannel(image,i);
2306         PixelTrait traits=GetPixelChannelTraits(image,channel);
2307         PixelTrait transpose_traits=GetPixelChannelTraits(transpose_image,
2308           channel);
2309         if ((traits == UndefinedPixelTrait) ||
2310             (transpose_traits == UndefinedPixelTrait))
2311           continue;
2312         SetPixelChannel(transpose_image,channel,p[i],q);
2313       }
2314       p+=GetPixelChannels(image);
2315       q+=GetPixelChannels(transpose_image);
2316     }
2317     if (SyncCacheViewAuthenticPixels(transpose_view,exception) == MagickFalse)
2318       status=MagickFalse;
2319     if (image->progress_monitor != (MagickProgressMonitor) NULL)
2320       {
2321         MagickBooleanType
2322           proceed;
2323
2324 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2325         #pragma omp critical (MagickCore_TransposeImage)
2326 #endif
2327         proceed=SetImageProgress(image,TransposeImageTag,progress++,
2328           image->rows);
2329         if (proceed == MagickFalse)
2330           status=MagickFalse;
2331       }
2332   }
2333   transpose_view=DestroyCacheView(transpose_view);
2334   image_view=DestroyCacheView(image_view);
2335   transpose_image->type=image->type;
2336   page=transpose_image->page;
2337   Swap(page.width,page.height);
2338   Swap(page.x,page.y);
2339   transpose_image->page=page;
2340   if (status == MagickFalse)
2341     transpose_image=DestroyImage(transpose_image);
2342   return(transpose_image);
2343 }
2344 \f
2345 /*
2346 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2347 %                                                                             %
2348 %                                                                             %
2349 %                                                                             %
2350 %   T r a n s v e r s e I m a g e                                             %
2351 %                                                                             %
2352 %                                                                             %
2353 %                                                                             %
2354 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2355 %
2356 %  TransverseImage() creates a vertical mirror image by reflecting the pixels
2357 %  around the central x-axis while rotating them by 270 degrees.
2358 %
2359 %  The format of the TransverseImage method is:
2360 %
2361 %      Image *TransverseImage(const Image *image,ExceptionInfo *exception)
2362 %
2363 %  A description of each parameter follows:
2364 %
2365 %    o image: the image.
2366 %
2367 %    o exception: return any errors or warnings in this structure.
2368 %
2369 */
2370 MagickExport Image *TransverseImage(const Image *image,ExceptionInfo *exception)
2371 {
2372 #define TransverseImageTag  "Transverse/Image"
2373
2374   CacheView
2375     *image_view,
2376     *transverse_view;
2377
2378   Image
2379     *transverse_image;
2380
2381   MagickBooleanType
2382     status;
2383
2384   MagickOffsetType
2385     progress;
2386
2387   RectangleInfo
2388     page;
2389
2390   ssize_t
2391     y;
2392
2393   assert(image != (const Image *) NULL);
2394   assert(image->signature == MagickSignature);
2395   if (image->debug != MagickFalse)
2396     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2397   assert(exception != (ExceptionInfo *) NULL);
2398   assert(exception->signature == MagickSignature);
2399   transverse_image=CloneImage(image,image->rows,image->columns,MagickTrue,
2400     exception);
2401   if (transverse_image == (Image *) NULL)
2402     return((Image *) NULL);
2403   /*
2404     Transverse image.
2405   */
2406   status=MagickTrue;
2407   progress=0;
2408   image_view=AcquireVirtualCacheView(image,exception);
2409   transverse_view=AcquireAuthenticCacheView(transverse_image,exception);
2410 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2411   #pragma omp parallel for schedule(static,4) shared(progress,status) \
2412     magick_threads(image,transverse_image,image->rows,1)
2413 #endif
2414   for (y=0; y < (ssize_t) image->rows; y++)
2415   {
2416     MagickBooleanType
2417       sync;
2418
2419     register const Quantum
2420       *restrict p;
2421
2422     register Quantum
2423       *restrict q;
2424
2425     register ssize_t
2426       x;
2427
2428     if (status == MagickFalse)
2429       continue;
2430     p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
2431     q=QueueCacheViewAuthenticPixels(transverse_view,(ssize_t) (image->rows-y-1),
2432       0,1,transverse_image->rows,exception);
2433     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
2434       {
2435         status=MagickFalse;
2436         continue;
2437       }
2438     q+=GetPixelChannels(transverse_image)*image->columns;
2439     for (x=0; x < (ssize_t) image->columns; x++)
2440     {
2441       register ssize_t
2442         i;
2443
2444       q-=GetPixelChannels(transverse_image);
2445       if (GetPixelReadMask(image,p) == 0)
2446         {
2447           p+=GetPixelChannels(image);
2448           continue;
2449         }
2450       for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
2451       {
2452         PixelChannel channel=GetPixelChannelChannel(image,i);
2453         PixelTrait traits=GetPixelChannelTraits(image,channel);
2454         PixelTrait transverse_traits=GetPixelChannelTraits(transverse_image,
2455           channel);
2456         if ((traits == UndefinedPixelTrait) ||
2457             (transverse_traits == UndefinedPixelTrait))
2458           continue;
2459         SetPixelChannel(transverse_image,channel,p[i],q);
2460       }
2461       p+=GetPixelChannels(image);
2462     }
2463     sync=SyncCacheViewAuthenticPixels(transverse_view,exception);
2464     if (sync == MagickFalse)
2465       status=MagickFalse;
2466     if (image->progress_monitor != (MagickProgressMonitor) NULL)
2467       {
2468         MagickBooleanType
2469           proceed;
2470
2471 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2472         #pragma omp critical (MagickCore_TransverseImage)
2473 #endif
2474         proceed=SetImageProgress(image,TransverseImageTag,progress++,
2475           image->rows);
2476         if (proceed == MagickFalse)
2477           status=MagickFalse;
2478       }
2479   }
2480   transverse_view=DestroyCacheView(transverse_view);
2481   image_view=DestroyCacheView(image_view);
2482   transverse_image->type=image->type;
2483   page=transverse_image->page;
2484   Swap(page.width,page.height);
2485   Swap(page.x,page.y);
2486   if (page.width != 0)
2487     page.x=(ssize_t) (page.width-transverse_image->columns-page.x);
2488   if (page.height != 0)
2489     page.y=(ssize_t) (page.height-transverse_image->rows-page.y);
2490   transverse_image->page=page;
2491   if (status == MagickFalse)
2492     transverse_image=DestroyImage(transverse_image);
2493   return(transverse_image);
2494 }
2495 \f
2496 /*
2497 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2498 %                                                                             %
2499 %                                                                             %
2500 %                                                                             %
2501 %   T r i m I m a g e                                                         %
2502 %                                                                             %
2503 %                                                                             %
2504 %                                                                             %
2505 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2506 %
2507 %  TrimImage() trims pixels from the image edges.  It allocates the memory
2508 %  necessary for the new Image structure and returns a pointer to the new
2509 %  image.
2510 %
2511 %  The format of the TrimImage method is:
2512 %
2513 %      Image *TrimImage(const Image *image,ExceptionInfo *exception)
2514 %
2515 %  A description of each parameter follows:
2516 %
2517 %    o image: the image.
2518 %
2519 %    o exception: return any errors or warnings in this structure.
2520 %
2521 */
2522 MagickExport Image *TrimImage(const Image *image,ExceptionInfo *exception)
2523 {
2524   RectangleInfo
2525     geometry;
2526
2527   assert(image != (const Image *) NULL);
2528   assert(image->signature == MagickSignature);
2529   if (image->debug != MagickFalse)
2530     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2531   geometry=GetImageBoundingBox(image,exception);
2532   if ((geometry.width == 0) || (geometry.height == 0))
2533     {
2534       Image
2535         *crop_image;
2536
2537       crop_image=CloneImage(image,1,1,MagickTrue,exception);
2538       if (crop_image == (Image *) NULL)
2539         return((Image *) NULL);
2540       crop_image->background_color.alpha=(Quantum) TransparentAlpha;
2541       crop_image->alpha_trait=BlendPixelTrait;
2542       (void) SetImageBackgroundColor(crop_image,exception);
2543       crop_image->page=image->page;
2544       crop_image->page.x=(-1);
2545       crop_image->page.y=(-1);
2546       return(crop_image);
2547     }
2548   geometry.x+=image->page.x;
2549   geometry.y+=image->page.y;
2550   return(CropImage(image,&geometry,exception));
2551 }