cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1 | /* |
| 2 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3 | % % |
| 4 | % % |
| 5 | % L AAA Y Y EEEEE RRRR % |
| 6 | % L A A Y Y E R R % |
| 7 | % L AAAAA Y EEE RRRR % |
| 8 | % L A A Y E R R % |
| 9 | % LLLLL A A Y EEEEE R R % |
| 10 | % % |
| 11 | % MagickCore Image Layering Methods % |
| 12 | % % |
| 13 | % Software Design % |
| 14 | % John Cristy % |
| 15 | % Anthony Thyssen % |
| 16 | % January 2006 % |
| 17 | % % |
| 18 | % % |
cristy | 7e41fe8 | 2010-12-04 23:12:08 +0000 | [diff] [blame] | 19 | % Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization % |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 20 | % dedicated to making software imaging solutions freely available. % |
| 21 | % % |
| 22 | % You may not use this file except in compliance with the License. You may % |
| 23 | % obtain a copy of the License at % |
| 24 | % % |
| 25 | % http://www.imagemagick.org/script/license.php % |
| 26 | % % |
| 27 | % Unless required by applicable law or agreed to in writing, software % |
| 28 | % distributed under the License is distributed on an "AS IS" BASIS, % |
| 29 | % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
| 30 | % See the License for the specific language governing permissions and % |
| 31 | % limitations under the License. % |
| 32 | % % |
| 33 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 34 | % |
| 35 | */ |
| 36 | |
| 37 | /* |
| 38 | Include declarations. |
| 39 | */ |
| 40 | #include "magick/studio.h" |
| 41 | #include "magick/artifact.h" |
| 42 | #include "magick/cache.h" |
| 43 | #include "magick/color.h" |
| 44 | #include "magick/color-private.h" |
| 45 | #include "magick/composite.h" |
| 46 | #include "magick/effect.h" |
| 47 | #include "magick/exception.h" |
| 48 | #include "magick/exception-private.h" |
| 49 | #include "magick/geometry.h" |
| 50 | #include "magick/image.h" |
| 51 | #include "magick/layer.h" |
| 52 | #include "magick/list.h" |
| 53 | #include "magick/memory_.h" |
| 54 | #include "magick/monitor.h" |
| 55 | #include "magick/monitor-private.h" |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 56 | #include "magick/option.h" |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 57 | #include "magick/pixel-private.h" |
| 58 | #include "magick/property.h" |
| 59 | #include "magick/profile.h" |
| 60 | #include "magick/resource_.h" |
| 61 | #include "magick/resize.h" |
| 62 | #include "magick/statistic.h" |
| 63 | #include "magick/string_.h" |
| 64 | #include "magick/transform.h" |
| 65 | |
| 66 | /* |
| 67 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 68 | % % |
| 69 | % % |
| 70 | % % |
| 71 | + C l e a r B o u n d s % |
| 72 | % % |
| 73 | % % |
| 74 | % % |
| 75 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 76 | % |
| 77 | % ClearBounds() Clear the area specified by the bounds in an image to |
| 78 | % transparency. This typically used to handle Background Disposal |
| 79 | % for the previous frame in an animation sequence. |
| 80 | % |
| 81 | % WARNING: no bounds checks are performed, except for the null or |
| 82 | % missed image, for images that don't change. in all other cases |
| 83 | % bound must fall within the image. |
| 84 | % |
| 85 | % The format is: |
| 86 | % |
| 87 | % void ClearBounds(Image *image,RectangleInfo *bounds) |
| 88 | % |
| 89 | % A description of each parameter follows: |
| 90 | % |
| 91 | % o image: the image to had the area cleared in |
| 92 | % |
| 93 | % o bounds: the area to be clear within the imag image |
| 94 | % |
| 95 | */ |
| 96 | static void ClearBounds(Image *image,RectangleInfo *bounds) |
| 97 | { |
| 98 | ExceptionInfo |
| 99 | *exception; |
| 100 | |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 101 | ssize_t |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 102 | y; |
| 103 | |
| 104 | if (bounds->x < 0) |
| 105 | return; |
| 106 | if (image->matte == MagickFalse) |
| 107 | (void) SetImageAlphaChannel(image,OpaqueAlphaChannel); |
| 108 | exception=(&image->exception); |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 109 | for (y=0; y < (ssize_t) bounds->height; y++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 110 | { |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 111 | register ssize_t |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 112 | x; |
| 113 | |
| 114 | register PixelPacket |
cristy | c47d1f8 | 2009-11-26 01:44:43 +0000 | [diff] [blame] | 115 | *restrict q; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 116 | |
| 117 | q=GetAuthenticPixels(image,bounds->x,bounds->y+y,bounds->width,1,exception); |
| 118 | if (q == (PixelPacket *) NULL) |
| 119 | break; |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 120 | for (x=0; x < (ssize_t) bounds->width; x++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 121 | { |
| 122 | q->opacity=(Quantum) TransparentOpacity; |
| 123 | q++; |
| 124 | } |
| 125 | if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| 126 | break; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | /* |
| 131 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 132 | % % |
| 133 | % % |
| 134 | % % |
| 135 | + I s B o u n d s C l e a r e d % |
| 136 | % % |
| 137 | % % |
| 138 | % % |
| 139 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 140 | % |
| 141 | % IsBoundsCleared() tests whether any pixel in the bounds given, gets cleared |
| 142 | % when going from the first image to the second image. This typically used |
| 143 | % to check if a proposed disposal method will work successfully to generate |
| 144 | % the second frame image from the first disposed form of the previous frame. |
| 145 | % |
| 146 | % The format is: |
| 147 | % |
| 148 | % MagickBooleanType IsBoundsCleared(const Image *image1, |
| 149 | % const Image *image2,RectangleInfo bounds,ExceptionInfo *exception) |
| 150 | % |
| 151 | % A description of each parameter follows: |
| 152 | % |
| 153 | % o image1, image 2: the images to check for cleared pixels |
| 154 | % |
| 155 | % o bounds: the area to be clear within the imag image |
| 156 | % |
| 157 | % o exception: return any errors or warnings in this structure. |
| 158 | % |
| 159 | % WARNING: no bounds checks are performed, except for the null or |
| 160 | % missed image, for images that don't change. in all other cases |
| 161 | % bound must fall within the image. |
| 162 | % |
| 163 | */ |
| 164 | static MagickBooleanType IsBoundsCleared(const Image *image1, |
| 165 | const Image *image2,RectangleInfo *bounds,ExceptionInfo *exception) |
| 166 | { |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 167 | register ssize_t |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 168 | x; |
| 169 | |
| 170 | register const PixelPacket |
| 171 | *p, |
| 172 | *q; |
| 173 | |
cristy | 9d314ff | 2011-03-09 01:30:28 +0000 | [diff] [blame] | 174 | ssize_t |
| 175 | y; |
| 176 | |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 177 | #if 0 |
| 178 | assert(image1->matte==MagickTrue); |
| 179 | assert(image2->matte==MagickTrue); |
| 180 | #endif |
| 181 | |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 182 | if ( bounds->x< 0 ) return(MagickFalse); |
| 183 | |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 184 | for (y=0; y < (ssize_t) bounds->height; y++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 185 | { |
| 186 | p=GetVirtualPixels(image1,bounds->x,bounds->y+y,bounds->width,1, |
| 187 | exception); |
| 188 | q=GetVirtualPixels(image2,bounds->x,bounds->y+y,bounds->width,1, |
| 189 | exception); |
| 190 | if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL)) |
| 191 | break; |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 192 | for (x=0; x < (ssize_t) bounds->width; x++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 193 | { |
cristy | cee9711 | 2010-05-28 00:44:52 +0000 | [diff] [blame] | 194 | if ((p->opacity <= (Quantum) (QuantumRange/2)) && |
| 195 | (q->opacity > (Quantum) (QuantumRange/2))) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 196 | break; |
| 197 | p++; |
| 198 | q++; |
| 199 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 200 | if (x < (ssize_t) bounds->width) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 201 | break; |
| 202 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 203 | return(y < (ssize_t) bounds->height ? MagickTrue : MagickFalse); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | /* |
| 207 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 208 | % % |
| 209 | % % |
| 210 | % % |
| 211 | % C o a l e s c e I m a g e s % |
| 212 | % % |
| 213 | % % |
| 214 | % % |
| 215 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 216 | % |
| 217 | % CoalesceImages() composites a set of images while respecting any page |
| 218 | % offsets and disposal methods. GIF, MIFF, and MNG animation sequences |
| 219 | % typically start with an image background and each subsequent image |
| 220 | % varies in size and offset. A new image sequence is returned with all |
| 221 | % images the same size as the first images virtual canvas and composited |
| 222 | % with the next image in the sequence. |
| 223 | % |
| 224 | % The format of the CoalesceImages method is: |
| 225 | % |
| 226 | % Image *CoalesceImages(Image *image,ExceptionInfo *exception) |
| 227 | % |
| 228 | % A description of each parameter follows: |
| 229 | % |
| 230 | % o image: the image sequence. |
| 231 | % |
| 232 | % o exception: return any errors or warnings in this structure. |
| 233 | % |
| 234 | */ |
| 235 | MagickExport Image *CoalesceImages(const Image *image,ExceptionInfo *exception) |
| 236 | { |
| 237 | Image |
| 238 | *coalesce_image, |
| 239 | *dispose_image, |
| 240 | *previous; |
| 241 | |
| 242 | register Image |
| 243 | *next; |
| 244 | |
| 245 | RectangleInfo |
| 246 | bounds; |
| 247 | |
| 248 | /* |
| 249 | Coalesce the image sequence. |
| 250 | */ |
| 251 | assert(image != (Image *) NULL); |
| 252 | assert(image->signature == MagickSignature); |
| 253 | if (image->debug != MagickFalse) |
| 254 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 255 | assert(exception != (ExceptionInfo *) NULL); |
| 256 | assert(exception->signature == MagickSignature); |
| 257 | |
| 258 | /* initialise first image */ |
| 259 | next=GetFirstImageInList(image); |
| 260 | bounds=next->page; |
| 261 | if (bounds.width == 0) |
| 262 | { |
| 263 | bounds.width=next->columns; |
| 264 | if (bounds.x > 0) |
| 265 | bounds.width+=bounds.x; |
| 266 | } |
| 267 | if (bounds.height == 0) |
| 268 | { |
| 269 | bounds.height=next->rows; |
| 270 | if (bounds.y > 0) |
| 271 | bounds.height+=bounds.y; |
| 272 | } |
| 273 | bounds.x=0; |
| 274 | bounds.y=0; |
| 275 | coalesce_image=CloneImage(next,bounds.width,bounds.height,MagickTrue, |
| 276 | exception); |
| 277 | if (coalesce_image == (Image *) NULL) |
| 278 | return((Image *) NULL); |
| 279 | coalesce_image->page=bounds; |
| 280 | coalesce_image->dispose=NoneDispose; |
| 281 | coalesce_image->background_color.opacity=(Quantum) TransparentOpacity; |
| 282 | (void) SetImageBackgroundColor(coalesce_image); |
| 283 | /* |
| 284 | Coalesce rest of the images. |
| 285 | */ |
| 286 | dispose_image=CloneImage(coalesce_image,0,0,MagickTrue,exception); |
| 287 | (void) CompositeImage(coalesce_image,CopyCompositeOp,next,next->page.x, |
| 288 | next->page.y); |
| 289 | next=GetNextImageInList(next); |
| 290 | for ( ; next != (Image *) NULL; next=GetNextImageInList(next)) |
| 291 | { |
| 292 | /* |
| 293 | Determine the bounds that was overlaid in the previous image. |
| 294 | */ |
| 295 | previous=GetPreviousImageInList(next); |
| 296 | bounds=previous->page; |
| 297 | bounds.width=previous->columns; |
| 298 | bounds.height=previous->rows; |
| 299 | if (bounds.x < 0) |
| 300 | { |
| 301 | bounds.width+=bounds.x; |
| 302 | bounds.x=0; |
| 303 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 304 | if ((ssize_t) (bounds.x+bounds.width) > (ssize_t) coalesce_image->columns) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 305 | bounds.width=coalesce_image->columns-bounds.x; |
| 306 | if (bounds.y < 0) |
| 307 | { |
| 308 | bounds.height+=bounds.y; |
| 309 | bounds.y=0; |
| 310 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 311 | if ((ssize_t) (bounds.y+bounds.height) > (ssize_t) coalesce_image->rows) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 312 | bounds.height=coalesce_image->rows-bounds.y; |
| 313 | /* |
| 314 | Replace the dispose image with the new coalesced image. |
| 315 | */ |
| 316 | if (GetPreviousImageInList(next)->dispose != PreviousDispose) |
| 317 | { |
| 318 | dispose_image=DestroyImage(dispose_image); |
| 319 | dispose_image=CloneImage(coalesce_image,0,0,MagickTrue,exception); |
| 320 | if (dispose_image == (Image *) NULL) |
| 321 | { |
| 322 | coalesce_image=DestroyImageList(coalesce_image); |
| 323 | return((Image *) NULL); |
| 324 | } |
| 325 | } |
| 326 | /* |
| 327 | Clear the overlaid area of the coalesced bounds for background disposal |
| 328 | */ |
| 329 | if (next->previous->dispose == BackgroundDispose) |
| 330 | ClearBounds(dispose_image, &bounds); |
| 331 | /* |
| 332 | Next image is the dispose image, overlaid with next frame in sequence. |
| 333 | */ |
| 334 | coalesce_image->next=CloneImage(dispose_image,0,0,MagickTrue,exception); |
| 335 | coalesce_image->next->previous=coalesce_image; |
| 336 | previous=coalesce_image; |
| 337 | coalesce_image=GetNextImageInList(coalesce_image); |
| 338 | coalesce_image->matte=MagickTrue; |
| 339 | (void) CompositeImage(coalesce_image,next->matte != MagickFalse ? |
| 340 | OverCompositeOp : CopyCompositeOp,next,next->page.x,next->page.y); |
| 341 | (void) CloneImageProfiles(coalesce_image,next); |
| 342 | (void) CloneImageProperties(coalesce_image,next); |
| 343 | (void) CloneImageArtifacts(coalesce_image,next); |
| 344 | coalesce_image->page=previous->page; |
| 345 | /* |
| 346 | If a pixel goes opaque to transparent, use background dispose. |
| 347 | */ |
| 348 | if (IsBoundsCleared(previous,coalesce_image,&bounds,exception)) |
| 349 | coalesce_image->dispose=BackgroundDispose; |
| 350 | else |
| 351 | coalesce_image->dispose=NoneDispose; |
| 352 | previous->dispose=coalesce_image->dispose; |
| 353 | } |
| 354 | dispose_image=DestroyImage(dispose_image); |
| 355 | return(GetFirstImageInList(coalesce_image)); |
| 356 | } |
| 357 | |
| 358 | /* |
| 359 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 360 | % % |
| 361 | % % |
| 362 | % % |
| 363 | % D i s p o s e I m a g e s % |
| 364 | % % |
| 365 | % % |
| 366 | % % |
| 367 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 368 | % |
| 369 | % DisposeImages() returns the coalesced frames of a GIF animation as it would |
| 370 | % appear after the GIF dispose method of that frame has been applied. That |
| 371 | % is it returned the appearance of each frame before the next is overlaid. |
| 372 | % |
| 373 | % The format of the DisposeImages method is: |
| 374 | % |
| 375 | % Image *DisposeImages(Image *image,ExceptionInfo *exception) |
| 376 | % |
| 377 | % A description of each parameter follows: |
| 378 | % |
| 379 | % o image: the image sequence. |
| 380 | % |
| 381 | % o exception: return any errors or warnings in this structure. |
| 382 | % |
| 383 | */ |
| 384 | MagickExport Image *DisposeImages(const Image *image,ExceptionInfo *exception) |
| 385 | { |
| 386 | Image |
| 387 | *dispose_image, |
| 388 | *dispose_images; |
| 389 | |
| 390 | register Image |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 391 | *curr; |
| 392 | |
| 393 | RectangleInfo |
| 394 | bounds; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 395 | |
| 396 | /* |
| 397 | Run the image through the animation sequence |
| 398 | */ |
| 399 | assert(image != (Image *) NULL); |
| 400 | assert(image->signature == MagickSignature); |
| 401 | if (image->debug != MagickFalse) |
| 402 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 403 | assert(exception != (ExceptionInfo *) NULL); |
| 404 | assert(exception->signature == MagickSignature); |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 405 | curr=GetFirstImageInList(image); |
| 406 | dispose_image=CloneImage(curr,curr->page.width,curr->page.height,MagickTrue, |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 407 | exception); |
| 408 | if (dispose_image == (Image *) NULL) |
| 409 | return((Image *) NULL); |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 410 | dispose_image->page=curr->page; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 411 | dispose_image->page.x=0; |
| 412 | dispose_image->page.y=0; |
| 413 | dispose_image->dispose=NoneDispose; |
| 414 | dispose_image->background_color.opacity=(Quantum) TransparentOpacity; |
| 415 | (void) SetImageBackgroundColor(dispose_image); |
| 416 | dispose_images=NewImageList(); |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 417 | for ( ; curr != (Image *) NULL; curr=GetNextImageInList(curr)) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 418 | { |
| 419 | Image |
| 420 | *current_image; |
| 421 | |
| 422 | /* |
| 423 | Overlay this frame's image over the previous disposal image. |
| 424 | */ |
| 425 | current_image=CloneImage(dispose_image,0,0,MagickTrue,exception); |
| 426 | if (current_image == (Image *) NULL) |
| 427 | { |
| 428 | dispose_images=DestroyImageList(dispose_images); |
| 429 | dispose_image=DestroyImage(dispose_image); |
| 430 | return((Image *) NULL); |
| 431 | } |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 432 | (void) CompositeImage(current_image,curr->matte != MagickFalse ? |
| 433 | OverCompositeOp : CopyCompositeOp,curr,curr->page.x,curr->page.y); |
| 434 | |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 435 | /* |
| 436 | Handle Background dispose: image is displayed for the delay period. |
| 437 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 438 | if (curr->dispose == BackgroundDispose) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 439 | { |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 440 | bounds=curr->page; |
| 441 | bounds.width=curr->columns; |
| 442 | bounds.height=curr->rows; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 443 | if (bounds.x < 0) |
| 444 | { |
| 445 | bounds.width+=bounds.x; |
| 446 | bounds.x=0; |
| 447 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 448 | if ((ssize_t) (bounds.x+bounds.width) > (ssize_t) current_image->columns) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 449 | bounds.width=current_image->columns-bounds.x; |
| 450 | if (bounds.y < 0) |
| 451 | { |
| 452 | bounds.height+=bounds.y; |
| 453 | bounds.y=0; |
| 454 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 455 | if ((ssize_t) (bounds.y+bounds.height) > (ssize_t) current_image->rows) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 456 | bounds.height=current_image->rows-bounds.y; |
| 457 | ClearBounds(current_image,&bounds); |
| 458 | } |
| 459 | /* |
| 460 | Select the appropriate previous/disposed image. |
| 461 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 462 | if (curr->dispose == PreviousDispose) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 463 | current_image=DestroyImage(current_image); |
| 464 | else |
| 465 | { |
| 466 | dispose_image=DestroyImage(dispose_image); |
| 467 | dispose_image=current_image; |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 468 | current_image=(Image *)NULL; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 469 | } |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 470 | /* |
| 471 | Save the dispose image just calculated for return. |
| 472 | */ |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 473 | { |
| 474 | Image |
| 475 | *dispose; |
| 476 | |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 477 | dispose=CloneImage(dispose_image,0,0,MagickTrue,exception); |
| 478 | if (dispose == (Image *) NULL) |
| 479 | { |
| 480 | dispose_images=DestroyImageList(dispose_images); |
| 481 | dispose_image=DestroyImage(dispose_image); |
| 482 | return((Image *) NULL); |
| 483 | } |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 484 | (void) CloneImageProfiles(dispose,curr); |
| 485 | (void) CloneImageProperties(dispose,curr); |
| 486 | (void) CloneImageArtifacts(dispose,curr); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 487 | dispose->page.x=0; |
| 488 | dispose->page.y=0; |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 489 | dispose->dispose=curr->dispose; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 490 | AppendImageToList(&dispose_images,dispose); |
| 491 | } |
| 492 | } |
| 493 | dispose_image=DestroyImage(dispose_image); |
| 494 | return(GetFirstImageInList(dispose_images)); |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 499 | % % |
| 500 | % % |
| 501 | % % |
| 502 | + C o m p a r e P i x e l s % |
| 503 | % % |
| 504 | % % |
| 505 | % % |
| 506 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 507 | % |
| 508 | % ComparePixels() Compare the two pixels and return true if the pixels |
| 509 | % differ according to the given LayerType comparision method. |
| 510 | % |
| 511 | % This currently only used internally by CompareImageBounds(). It is |
| 512 | % doubtful that this sub-routine will be useful outside this module. |
| 513 | % |
| 514 | % The format of the ComparePixels method is: |
| 515 | % |
| 516 | % MagickBooleanType *ComparePixels(const ImageLayerMethod method, |
| 517 | % const MagickPixelPacket *p,const MagickPixelPacket *q) |
| 518 | % |
| 519 | % A description of each parameter follows: |
| 520 | % |
| 521 | % o method: What differences to look for. Must be one of |
| 522 | % CompareAnyLayer, CompareClearLayer, CompareOverlayLayer. |
| 523 | % |
| 524 | % o p, q: the pixels to test for appropriate differences. |
| 525 | % |
| 526 | */ |
| 527 | |
| 528 | static MagickBooleanType ComparePixels(const ImageLayerMethod method, |
| 529 | const MagickPixelPacket *p,const MagickPixelPacket *q) |
| 530 | { |
| 531 | MagickRealType |
| 532 | o1, |
| 533 | o2; |
| 534 | |
| 535 | /* |
| 536 | Any change in pixel values |
| 537 | */ |
| 538 | if (method == CompareAnyLayer) |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 539 | return((MagickBooleanType)(IsMagickColorSimilar(p,q) == MagickFalse)); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 540 | |
| 541 | o1 = (p->matte != MagickFalse) ? p->opacity : OpaqueOpacity; |
| 542 | o2 = (q->matte != MagickFalse) ? q->opacity : OpaqueOpacity; |
| 543 | |
| 544 | /* |
| 545 | Pixel goes from opaque to transprency |
| 546 | */ |
| 547 | if (method == CompareClearLayer) |
| 548 | return((MagickBooleanType) ( (o1 <= ((MagickRealType) QuantumRange/2.0)) && |
| 549 | (o2 > ((MagickRealType) QuantumRange/2.0)) ) ); |
| 550 | |
| 551 | /* |
| 552 | overlay would change first pixel by second |
| 553 | */ |
| 554 | if (method == CompareOverlayLayer) |
| 555 | { |
| 556 | if (o2 > ((MagickRealType) QuantumRange/2.0)) |
| 557 | return MagickFalse; |
| 558 | return((MagickBooleanType) (IsMagickColorSimilar(p,q) == MagickFalse)); |
| 559 | } |
| 560 | return(MagickFalse); |
| 561 | } |
| 562 | |
| 563 | |
| 564 | /* |
| 565 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 566 | % % |
| 567 | % % |
| 568 | % % |
| 569 | + C o m p a r e I m a g e B o u n d s % |
| 570 | % % |
| 571 | % % |
| 572 | % % |
| 573 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 574 | % |
| 575 | % CompareImageBounds() Given two images return the smallest rectangular area |
| 576 | % by which the two images differ, accourding to the given 'Compare...' |
| 577 | % layer method. |
| 578 | % |
| 579 | % This currently only used internally in this module, but may eventually |
| 580 | % be used by other modules. |
| 581 | % |
| 582 | % The format of the CompareImageBounds method is: |
| 583 | % |
| 584 | % RectangleInfo *CompareImageBounds(const ImageLayerMethod method, |
| 585 | % const Image *image1, const Image *image2, ExceptionInfo *exception) |
| 586 | % |
| 587 | % A description of each parameter follows: |
| 588 | % |
| 589 | % o method: What differences to look for. Must be one of |
| 590 | % CompareAnyLayer, CompareClearLayer, CompareOverlayLayer. |
| 591 | % |
| 592 | % o image1, image2: the two images to compare. |
| 593 | % |
| 594 | % o exception: return any errors or warnings in this structure. |
| 595 | % |
| 596 | */ |
| 597 | |
| 598 | static RectangleInfo CompareImageBounds(const Image *image1,const Image *image2, |
| 599 | const ImageLayerMethod method,ExceptionInfo *exception) |
| 600 | { |
| 601 | RectangleInfo |
| 602 | bounds; |
| 603 | |
| 604 | MagickPixelPacket |
| 605 | pixel1, |
| 606 | pixel2; |
| 607 | |
| 608 | register const IndexPacket |
| 609 | *indexes1, |
| 610 | *indexes2; |
| 611 | |
| 612 | register const PixelPacket |
| 613 | *p, |
| 614 | *q; |
| 615 | |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 616 | register ssize_t |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 617 | x; |
| 618 | |
cristy | 9d314ff | 2011-03-09 01:30:28 +0000 | [diff] [blame] | 619 | ssize_t |
| 620 | y; |
| 621 | |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 622 | #if 0 |
| 623 | /* only same sized images can be compared */ |
| 624 | assert(image1->columns == image2->columns); |
| 625 | assert(image1->rows == image2->rows); |
| 626 | #endif |
| 627 | |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 628 | /* |
| 629 | Set bounding box of the differences between images |
| 630 | */ |
| 631 | GetMagickPixelPacket(image1,&pixel1); |
| 632 | GetMagickPixelPacket(image2,&pixel2); |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 633 | for (x=0; x < (ssize_t) image1->columns; x++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 634 | { |
| 635 | p=GetVirtualPixels(image1,x,0,1,image1->rows,exception); |
| 636 | q=GetVirtualPixels(image2,x,0,1,image2->rows,exception); |
| 637 | if ((p == (const PixelPacket *) NULL) || |
| 638 | (q == (const PixelPacket *) NULL)) |
| 639 | break; |
| 640 | indexes1=GetVirtualIndexQueue(image1); |
| 641 | indexes2=GetVirtualIndexQueue(image2); |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 642 | for (y=0; y < (ssize_t) image1->rows; y++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 643 | { |
| 644 | SetMagickPixelPacket(image1,p,indexes1+x,&pixel1); |
| 645 | SetMagickPixelPacket(image2,q,indexes2+x,&pixel2); |
| 646 | if (ComparePixels(method,&pixel1,&pixel2)) |
| 647 | break; |
| 648 | p++; |
| 649 | q++; |
| 650 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 651 | if (y < (ssize_t) image1->rows) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 652 | break; |
| 653 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 654 | if (x >= (ssize_t) image1->columns) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 655 | { |
| 656 | /* |
| 657 | Images are identical, return a null image. |
| 658 | */ |
| 659 | bounds.x=-1; |
| 660 | bounds.y=-1; |
| 661 | bounds.width=1; |
| 662 | bounds.height=1; |
| 663 | return(bounds); |
| 664 | } |
| 665 | bounds.x=x; |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 666 | for (x=(ssize_t) image1->columns-1; x >= 0; x--) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 667 | { |
| 668 | p=GetVirtualPixels(image1,x,0,1,image1->rows,exception); |
| 669 | q=GetVirtualPixels(image2,x,0,1,image2->rows,exception); |
| 670 | if ((p == (const PixelPacket *) NULL) || |
| 671 | (q == (const PixelPacket *) NULL)) |
| 672 | break; |
| 673 | indexes1=GetVirtualIndexQueue(image1); |
| 674 | indexes2=GetVirtualIndexQueue(image2); |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 675 | for (y=0; y < (ssize_t) image1->rows; y++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 676 | { |
| 677 | SetMagickPixelPacket(image1,p,indexes1+x,&pixel1); |
| 678 | SetMagickPixelPacket(image2,q,indexes2+x,&pixel2); |
| 679 | if (ComparePixels(method,&pixel1,&pixel2)) |
| 680 | break; |
| 681 | p++; |
| 682 | q++; |
| 683 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 684 | if (y < (ssize_t) image1->rows) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 685 | break; |
| 686 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 687 | bounds.width=(size_t) (x-bounds.x+1); |
| 688 | for (y=0; y < (ssize_t) image1->rows; y++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 689 | { |
| 690 | p=GetVirtualPixels(image1,0,y,image1->columns,1,exception); |
| 691 | q=GetVirtualPixels(image2,0,y,image2->columns,1,exception); |
| 692 | if ((p == (const PixelPacket *) NULL) || |
| 693 | (q == (const PixelPacket *) NULL)) |
| 694 | break; |
| 695 | indexes1=GetVirtualIndexQueue(image1); |
| 696 | indexes2=GetVirtualIndexQueue(image2); |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 697 | for (x=0; x < (ssize_t) image1->columns; x++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 698 | { |
| 699 | SetMagickPixelPacket(image1,p,indexes1+x,&pixel1); |
| 700 | SetMagickPixelPacket(image2,q,indexes2+x,&pixel2); |
| 701 | if (ComparePixels(method,&pixel1,&pixel2)) |
| 702 | break; |
| 703 | p++; |
| 704 | q++; |
| 705 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 706 | if (x < (ssize_t) image1->columns) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 707 | break; |
| 708 | } |
| 709 | bounds.y=y; |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 710 | for (y=(ssize_t) image1->rows-1; y >= 0; y--) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 711 | { |
| 712 | p=GetVirtualPixels(image1,0,y,image1->columns,1,exception); |
| 713 | q=GetVirtualPixels(image2,0,y,image2->columns,1,exception); |
| 714 | if ((p == (const PixelPacket *) NULL) || |
| 715 | (q == (const PixelPacket *) NULL)) |
| 716 | break; |
| 717 | indexes1=GetVirtualIndexQueue(image1); |
| 718 | indexes2=GetVirtualIndexQueue(image2); |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 719 | for (x=0; x < (ssize_t) image1->columns; x++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 720 | { |
| 721 | SetMagickPixelPacket(image1,p,indexes1+x,&pixel1); |
| 722 | SetMagickPixelPacket(image2,q,indexes2+x,&pixel2); |
| 723 | if (ComparePixels(method,&pixel1,&pixel2)) |
| 724 | break; |
| 725 | p++; |
| 726 | q++; |
| 727 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 728 | if (x < (ssize_t) image1->columns) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 729 | break; |
| 730 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 731 | bounds.height=(size_t) (y-bounds.y+1); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 732 | return(bounds); |
| 733 | } |
| 734 | |
| 735 | /* |
| 736 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 737 | % % |
| 738 | % % |
| 739 | % % |
| 740 | % C o m p a r e I m a g e L a y e r s % |
| 741 | % % |
| 742 | % % |
| 743 | % % |
| 744 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 745 | % |
| 746 | % CompareImageLayers() compares each image with the next in a sequence and |
| 747 | % returns the minimum bounding region of all the pixel differences (of the |
| 748 | % ImageLayerMethod specified) it discovers. |
| 749 | % |
| 750 | % Images do NOT have to be the same size, though it is best that all the |
| 751 | % images are 'coalesced' (images are all the same size, on a flattened |
| 752 | % canvas, so as to represent exactly how an specific frame should look). |
| 753 | % |
| 754 | % No GIF dispose methods are applied, so GIF animations must be coalesced |
| 755 | % before applying this image operator to find differences to them. |
| 756 | % |
| 757 | % The format of the CompareImageLayers method is: |
| 758 | % |
| 759 | % Image *CompareImageLayers(const Image *images, |
| 760 | % const ImageLayerMethod method,ExceptionInfo *exception) |
| 761 | % |
| 762 | % A description of each parameter follows: |
| 763 | % |
| 764 | % o image: the image. |
| 765 | % |
| 766 | % o method: the layers type to compare images with. Must be one of... |
| 767 | % CompareAnyLayer, CompareClearLayer, CompareOverlayLayer. |
| 768 | % |
| 769 | % o exception: return any errors or warnings in this structure. |
| 770 | % |
| 771 | */ |
| 772 | |
| 773 | MagickExport Image *CompareImageLayers(const Image *image, |
| 774 | const ImageLayerMethod method, ExceptionInfo *exception) |
| 775 | { |
| 776 | Image |
| 777 | *image_a, |
| 778 | *image_b, |
| 779 | *layers; |
| 780 | |
| 781 | RectangleInfo |
| 782 | *bounds; |
| 783 | |
| 784 | register const Image |
| 785 | *next; |
| 786 | |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 787 | register ssize_t |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 788 | i; |
| 789 | |
| 790 | assert(image != (const Image *) NULL); |
| 791 | assert(image->signature == MagickSignature); |
| 792 | if (image->debug != MagickFalse) |
| 793 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 794 | assert(exception != (ExceptionInfo *) NULL); |
| 795 | assert(exception->signature == MagickSignature); |
| 796 | assert((method == CompareAnyLayer) || |
| 797 | (method == CompareClearLayer) || |
| 798 | (method == CompareOverlayLayer)); |
| 799 | /* |
| 800 | Allocate bounds memory. |
| 801 | */ |
| 802 | next=GetFirstImageInList(image); |
| 803 | bounds=(RectangleInfo *) AcquireQuantumMemory((size_t) |
| 804 | GetImageListLength(next),sizeof(*bounds)); |
| 805 | if (bounds == (RectangleInfo *) NULL) |
| 806 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 807 | /* |
| 808 | Set up first comparision images. |
| 809 | */ |
| 810 | image_a=CloneImage(next,next->page.width,next->page.height, |
| 811 | MagickTrue,exception); |
| 812 | if (image_a == (Image *) NULL) |
| 813 | { |
| 814 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 815 | return((Image *) NULL); |
| 816 | } |
| 817 | image_a->background_color.opacity=(Quantum) TransparentOpacity; |
| 818 | (void) SetImageBackgroundColor(image_a); |
| 819 | image_a->page=next->page; |
| 820 | image_a->page.x=0; |
| 821 | image_a->page.y=0; |
| 822 | (void) CompositeImage(image_a,CopyCompositeOp,next,next->page.x,next->page.y); |
| 823 | /* |
| 824 | Compute the bounding box of changes for the later images |
| 825 | */ |
| 826 | i=0; |
| 827 | next=GetNextImageInList(next); |
| 828 | for ( ; next != (const Image *) NULL; next=GetNextImageInList(next)) |
| 829 | { |
| 830 | image_b=CloneImage(image_a,0,0,MagickTrue,exception); |
| 831 | if (image_b == (Image *) NULL) |
| 832 | { |
| 833 | image_a=DestroyImage(image_a); |
| 834 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 835 | return((Image *) NULL); |
| 836 | } |
| 837 | (void) CompositeImage(image_a,CopyCompositeOp,next,next->page.x, |
| 838 | next->page.y); |
| 839 | bounds[i]=CompareImageBounds(image_b,image_a,method,exception); |
| 840 | |
| 841 | image_b=DestroyImage(image_b); |
| 842 | i++; |
| 843 | } |
| 844 | image_a=DestroyImage(image_a); |
| 845 | /* |
| 846 | Clone first image in sequence. |
| 847 | */ |
| 848 | next=GetFirstImageInList(image); |
| 849 | layers=CloneImage(next,0,0,MagickTrue,exception); |
| 850 | if (layers == (Image *) NULL) |
| 851 | { |
| 852 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 853 | return((Image *) NULL); |
| 854 | } |
| 855 | /* |
| 856 | Deconstruct the image sequence. |
| 857 | */ |
| 858 | i=0; |
| 859 | next=GetNextImageInList(next); |
| 860 | for ( ; next != (const Image *) NULL; next=GetNextImageInList(next)) |
| 861 | { |
| 862 | image_a=CloneImage(next,0,0,MagickTrue,exception); |
| 863 | if (image_a == (Image *) NULL) |
| 864 | break; |
| 865 | image_b=CropImage(image_a,&bounds[i],exception); |
| 866 | image_a=DestroyImage(image_a); |
| 867 | if (image_b == (Image *) NULL) |
| 868 | break; |
| 869 | AppendImageToList(&layers,image_b); |
| 870 | i++; |
| 871 | } |
| 872 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 873 | if (next != (Image *) NULL) |
| 874 | { |
| 875 | layers=DestroyImageList(layers); |
| 876 | return((Image *) NULL); |
| 877 | } |
| 878 | return(GetFirstImageInList(layers)); |
| 879 | } |
| 880 | |
| 881 | /* |
| 882 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 883 | % % |
| 884 | % % |
| 885 | % % |
| 886 | % D e c o n s t r u c t I m a g e s % |
| 887 | % % |
| 888 | % % |
| 889 | % % |
| 890 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 891 | % |
| 892 | % DeconstructImages() compares each image with the next in a sequence and |
| 893 | % returns the minimum bounding region of all differences from the first image. |
| 894 | % |
| 895 | % This function is deprecated in favor of the more universal |
| 896 | % CompareImageLayers() function. |
| 897 | % |
| 898 | % The format of the DeconstructImages method is: |
| 899 | % |
| 900 | % Image *DeconstructImages(const Image *images, ExceptionInfo *exception) |
| 901 | % |
| 902 | % A description of each parameter follows: |
| 903 | % |
| 904 | % o image: the image. |
| 905 | % |
| 906 | % o exception: return any errors or warnings in this structure. |
| 907 | % |
| 908 | */ |
| 909 | |
| 910 | MagickExport Image *DeconstructImages(const Image *images, |
| 911 | ExceptionInfo *exception) |
| 912 | { |
| 913 | return(CompareImageLayers(images,CompareAnyLayer,exception)); |
| 914 | } |
| 915 | |
| 916 | /* |
| 917 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 918 | % % |
| 919 | % % |
| 920 | % % |
| 921 | + O p t i m i z e L a y e r F r a m e s % |
| 922 | % % |
| 923 | % % |
| 924 | % % |
| 925 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 926 | % |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 927 | % OptimizeLayerFrames() takes a coalesced GIF animation, and compares each |
| 928 | % frame against the three different 'disposal' forms of the previous frame. |
| 929 | % From this it then attempts to select the smallest cropped image and |
| 930 | % disposal method needed to reproduce the resulting image. |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 931 | % |
| 932 | % Note that this not easy, and may require the expandsion of the bounds |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 933 | % of previous frame, simply clear pixels for the next animation frame to |
| 934 | % transparency according to the selected dispose method. |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 935 | % |
| 936 | % The format of the OptimizeLayerFrames method is: |
| 937 | % |
| 938 | % static Image *OptimizeLayerFrames(const Image *image, |
| 939 | % const ImageLayerMethod method, ExceptionInfo *exception) |
| 940 | % |
| 941 | % A description of each parameter follows: |
| 942 | % |
| 943 | % o image: the image. |
| 944 | % |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 945 | % o method: the layers technique to optimize with. Must be one of... |
| 946 | % OptimizeImageLayer, or OptimizePlusLayer. The Plus form allows |
| 947 | % the addition of extra 'zero delay' frames to clear pixels from |
| 948 | % the previous frame, and the removal of frames that done change, |
| 949 | % merging the delay times together. |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 950 | % |
| 951 | % o exception: return any errors or warnings in this structure. |
| 952 | % |
| 953 | */ |
| 954 | /* |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 955 | Define a 'fake' dispose method where the frame is duplicated, (for |
| 956 | OptimizePlusLayer) with a extra zero time delay frame which does a |
| 957 | BackgroundDisposal to clear the pixels that need to be cleared. |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 958 | */ |
| 959 | #define DupDispose ((DisposeType)9) |
| 960 | /* |
| 961 | Another 'fake' dispose method used to removed frames that don't change. |
| 962 | */ |
| 963 | #define DelDispose ((DisposeType)8) |
| 964 | |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 965 | #define DEBUG_OPT_FRAME 0 |
| 966 | |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 967 | static Image *OptimizeLayerFrames(const Image *image, |
| 968 | const ImageLayerMethod method, ExceptionInfo *exception) |
| 969 | { |
| 970 | ExceptionInfo |
| 971 | *sans_exception; |
| 972 | |
| 973 | Image |
| 974 | *prev_image, |
| 975 | *dup_image, |
| 976 | *bgnd_image, |
| 977 | *optimized_image; |
| 978 | |
| 979 | RectangleInfo |
| 980 | try_bounds, |
| 981 | bgnd_bounds, |
| 982 | dup_bounds, |
| 983 | *bounds; |
| 984 | |
| 985 | MagickBooleanType |
| 986 | add_frames, |
| 987 | try_cleared, |
| 988 | cleared; |
| 989 | |
| 990 | DisposeType |
| 991 | *disposals; |
| 992 | |
| 993 | register const Image |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 994 | *curr; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 995 | |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 996 | register ssize_t |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 997 | i; |
| 998 | |
| 999 | assert(image != (const Image *) NULL); |
| 1000 | assert(image->signature == MagickSignature); |
| 1001 | if (image->debug != MagickFalse) |
| 1002 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 1003 | assert(exception != (ExceptionInfo *) NULL); |
| 1004 | assert(exception->signature == MagickSignature); |
| 1005 | assert(method == OptimizeLayer || |
| 1006 | method == OptimizeImageLayer || |
| 1007 | method == OptimizePlusLayer); |
| 1008 | |
| 1009 | /* |
| 1010 | Are we allowed to add/remove frames from animation |
| 1011 | */ |
| 1012 | add_frames=method == OptimizePlusLayer ? MagickTrue : MagickFalse; |
| 1013 | /* |
| 1014 | Ensure all the images are the same size |
| 1015 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1016 | curr=GetFirstImageInList(image); |
| 1017 | for (; curr != (Image *) NULL; curr=GetNextImageInList(curr)) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1018 | { |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1019 | if ((curr->columns != image->columns) || (curr->rows != image->rows)) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1020 | ThrowImageException(OptionError,"ImagesAreNotTheSameSize"); |
| 1021 | /* |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1022 | FUTURE: also check that image is also fully coalesced (full page) |
| 1023 | Though as long as they are the same size it should not matter. |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1024 | */ |
| 1025 | } |
| 1026 | /* |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1027 | Allocate memory (times 2 if we allow the use of frame duplications) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1028 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1029 | curr=GetFirstImageInList(image); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1030 | bounds=(RectangleInfo *) AcquireQuantumMemory((size_t) |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1031 | GetImageListLength(curr),(add_frames != MagickFalse ? 2UL : 1UL)* |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1032 | sizeof(*bounds)); |
| 1033 | if (bounds == (RectangleInfo *) NULL) |
| 1034 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 1035 | disposals=(DisposeType *) AcquireQuantumMemory((size_t) |
| 1036 | GetImageListLength(image),(add_frames != MagickFalse ? 2UL : 1UL)* |
| 1037 | sizeof(*disposals)); |
| 1038 | if (disposals == (DisposeType *) NULL) |
| 1039 | { |
| 1040 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 1041 | ThrowImageException(ResourceLimitError,"MemoryAllocationFailed"); |
| 1042 | } |
| 1043 | /* |
| 1044 | Initialise Previous Image as fully transparent |
| 1045 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1046 | prev_image=CloneImage(curr,curr->page.width,curr->page.height, |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1047 | MagickTrue,exception); |
| 1048 | if (prev_image == (Image *) NULL) |
| 1049 | { |
| 1050 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 1051 | disposals=(DisposeType *) RelinquishMagickMemory(disposals); |
| 1052 | return((Image *) NULL); |
| 1053 | } |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1054 | prev_image->page=curr->page; /* ERROR: <-- should not be need, but is! */ |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1055 | prev_image->page.x=0; |
| 1056 | prev_image->page.y=0; |
| 1057 | prev_image->dispose=NoneDispose; |
| 1058 | |
| 1059 | prev_image->background_color.opacity=(Quantum) TransparentOpacity; |
| 1060 | (void) SetImageBackgroundColor(prev_image); |
| 1061 | /* |
| 1062 | Figure out the area of overlay of the first frame |
| 1063 | No pixel could be cleared as all pixels are already cleared. |
| 1064 | */ |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1065 | #if DEBUG_OPT_FRAME |
| 1066 | i=0; |
| 1067 | fprintf(stderr, "frame %.20g :-\n", (double) i); |
| 1068 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1069 | disposals[0]=NoneDispose; |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1070 | bounds[0]=CompareImageBounds(prev_image,curr,CompareAnyLayer,exception); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1071 | #if DEBUG_OPT_FRAME |
| 1072 | fprintf(stderr, "overlay: %.20gx%.20g%+.20g%+.20g\n\n", |
| 1073 | (double) bounds[i].width,(double) bounds[i].height, |
| 1074 | (double) bounds[i].x,(double) bounds[i].y ); |
| 1075 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1076 | /* |
| 1077 | Compute the bounding box of changes for each pair of images. |
| 1078 | */ |
| 1079 | i=1; |
| 1080 | bgnd_image=(Image *)NULL; |
| 1081 | dup_image=(Image *)NULL; |
| 1082 | dup_bounds.width=0; |
| 1083 | dup_bounds.height=0; |
| 1084 | dup_bounds.x=0; |
| 1085 | dup_bounds.y=0; |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1086 | curr=GetNextImageInList(curr); |
| 1087 | for ( ; curr != (const Image *) NULL; curr=GetNextImageInList(curr)) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1088 | { |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1089 | #if DEBUG_OPT_FRAME |
| 1090 | fprintf(stderr, "frame %.20g :-\n", (double) i); |
| 1091 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1092 | /* |
| 1093 | Assume none disposal is the best |
| 1094 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1095 | bounds[i]=CompareImageBounds(curr->previous,curr,CompareAnyLayer,exception); |
| 1096 | cleared=IsBoundsCleared(curr->previous,curr,&bounds[i],exception); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1097 | disposals[i-1]=NoneDispose; |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1098 | #if DEBUG_OPT_FRAME |
| 1099 | fprintf(stderr, "overlay: %.20gx%.20g%+.20g%+.20g%s%s\n", |
| 1100 | (double) bounds[i].width,(double) bounds[i].height, |
| 1101 | (double) bounds[i].x,(double) bounds[i].y, |
| 1102 | bounds[i].x < 0?" (unchanged)":"", |
| 1103 | cleared?" (pixels cleared)":""); |
| 1104 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1105 | if ( bounds[i].x < 0 ) { |
| 1106 | /* |
| 1107 | Image frame is exactly the same as the previous frame! |
| 1108 | If not adding frames leave it to be cropped down to a null image. |
| 1109 | Otherwise mark previous image for deleted, transfering its crop bounds |
| 1110 | to the current image. |
| 1111 | */ |
| 1112 | if ( add_frames && i>=2 ) { |
| 1113 | disposals[i-1]=DelDispose; |
| 1114 | disposals[i]=NoneDispose; |
| 1115 | bounds[i]=bounds[i-1]; |
| 1116 | i++; |
| 1117 | continue; |
| 1118 | } |
| 1119 | } |
| 1120 | else |
| 1121 | { |
| 1122 | /* |
| 1123 | Compare a none disposal against a previous disposal |
| 1124 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1125 | try_bounds=CompareImageBounds(prev_image,curr,CompareAnyLayer,exception); |
| 1126 | try_cleared=IsBoundsCleared(prev_image,curr,&try_bounds,exception); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1127 | #if DEBUG_OPT_FRAME |
| 1128 | fprintf(stderr, "test_prev: %.20gx%.20g%+.20g%+.20g%s\n", |
| 1129 | (double) try_bounds.width,(double) try_bounds.height, |
| 1130 | (double) try_bounds.x,(double) try_bounds.y, |
| 1131 | try_cleared?" (pixels were cleared)":""); |
| 1132 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1133 | if ( (!try_cleared && cleared ) || |
| 1134 | try_bounds.width * try_bounds.height |
| 1135 | < bounds[i].width * bounds[i].height ) |
| 1136 | { |
| 1137 | cleared=try_cleared; |
| 1138 | bounds[i]=try_bounds; |
| 1139 | disposals[i-1]=PreviousDispose; |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1140 | #if DEBUG_OPT_FRAME |
| 1141 | fprintf(stderr, "previous: accepted\n"); |
| 1142 | } else { |
| 1143 | fprintf(stderr, "previous: rejected\n"); |
| 1144 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1145 | } |
| 1146 | |
| 1147 | /* |
| 1148 | If we are allowed lets try a complex frame duplication. |
| 1149 | It is useless if the previous image already clears pixels correctly. |
| 1150 | This method will always clear all the pixels that need to be cleared. |
| 1151 | */ |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1152 | dup_bounds.width=dup_bounds.height=0; /* no dup, no pixel added */ |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1153 | if ( add_frames ) |
| 1154 | { |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1155 | dup_image=CloneImage(curr->previous,curr->previous->page.width, |
| 1156 | curr->previous->page.height,MagickTrue,exception); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1157 | if (dup_image == (Image *) NULL) |
| 1158 | { |
| 1159 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 1160 | disposals=(DisposeType *) RelinquishMagickMemory(disposals); |
| 1161 | prev_image=DestroyImage(prev_image); |
| 1162 | return((Image *) NULL); |
| 1163 | } |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1164 | dup_bounds=CompareImageBounds(dup_image,curr,CompareClearLayer,exception); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1165 | ClearBounds(dup_image,&dup_bounds); |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1166 | try_bounds=CompareImageBounds(dup_image,curr,CompareAnyLayer,exception); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1167 | if ( cleared || |
| 1168 | dup_bounds.width*dup_bounds.height |
| 1169 | +try_bounds.width*try_bounds.height |
| 1170 | < bounds[i].width * bounds[i].height ) |
| 1171 | { |
| 1172 | cleared=MagickFalse; |
| 1173 | bounds[i]=try_bounds; |
| 1174 | disposals[i-1]=DupDispose; |
| 1175 | /* to be finalised later, if found to be optimial */ |
| 1176 | } |
| 1177 | else |
| 1178 | dup_bounds.width=dup_bounds.height=0; |
| 1179 | } |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1180 | /* |
| 1181 | Now compare against a simple background disposal |
| 1182 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1183 | bgnd_image=CloneImage(curr->previous,curr->previous->page.width, |
| 1184 | curr->previous->page.height,MagickTrue,exception); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1185 | if (bgnd_image == (Image *) NULL) |
| 1186 | { |
| 1187 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 1188 | disposals=(DisposeType *) RelinquishMagickMemory(disposals); |
| 1189 | prev_image=DestroyImage(prev_image); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1190 | if ( dup_image != (Image *) NULL) |
| 1191 | dup_image=DestroyImage(dup_image); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1192 | return((Image *) NULL); |
| 1193 | } |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1194 | bgnd_bounds=bounds[i-1]; /* interum bounds of the previous image */ |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1195 | ClearBounds(bgnd_image,&bgnd_bounds); |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1196 | try_bounds=CompareImageBounds(bgnd_image,curr,CompareAnyLayer,exception); |
| 1197 | try_cleared=IsBoundsCleared(bgnd_image,curr,&try_bounds,exception); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1198 | #if DEBUG_OPT_FRAME |
| 1199 | fprintf(stderr, "background: %s\n", |
| 1200 | try_cleared?"(pixels cleared)":""); |
| 1201 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1202 | if ( try_cleared ) |
| 1203 | { |
| 1204 | /* |
| 1205 | Straight background disposal failed to clear pixels needed! |
| 1206 | Lets try expanding the disposal area of the previous frame, to |
| 1207 | include the pixels that are cleared. This guaranteed |
| 1208 | to work, though may not be the most optimized solution. |
| 1209 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1210 | try_bounds=CompareImageBounds(curr->previous,curr,CompareClearLayer,exception); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1211 | #if DEBUG_OPT_FRAME |
| 1212 | fprintf(stderr, "expand_clear: %.20gx%.20g%+.20g%+.20g%s\n", |
| 1213 | (double) try_bounds.width,(double) try_bounds.height, |
| 1214 | (double) try_bounds.x,(double) try_bounds.y, |
| 1215 | try_bounds.x<0?" (no expand nessary)":""); |
| 1216 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1217 | if ( bgnd_bounds.x < 0 ) |
| 1218 | bgnd_bounds = try_bounds; |
| 1219 | else |
| 1220 | { |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1221 | #if DEBUG_OPT_FRAME |
| 1222 | fprintf(stderr, "expand_bgnd: %.20gx%.20g%+.20g%+.20g\n", |
| 1223 | (double) bgnd_bounds.width,(double) bgnd_bounds.height, |
| 1224 | (double) bgnd_bounds.x,(double) bgnd_bounds.y ); |
| 1225 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1226 | if ( try_bounds.x < bgnd_bounds.x ) |
| 1227 | { |
| 1228 | bgnd_bounds.width+= bgnd_bounds.x-try_bounds.x; |
| 1229 | if ( bgnd_bounds.width < try_bounds.width ) |
| 1230 | bgnd_bounds.width = try_bounds.width; |
| 1231 | bgnd_bounds.x = try_bounds.x; |
| 1232 | } |
| 1233 | else |
| 1234 | { |
| 1235 | try_bounds.width += try_bounds.x - bgnd_bounds.x; |
| 1236 | if ( bgnd_bounds.width < try_bounds.width ) |
| 1237 | bgnd_bounds.width = try_bounds.width; |
| 1238 | } |
| 1239 | if ( try_bounds.y < bgnd_bounds.y ) |
| 1240 | { |
| 1241 | bgnd_bounds.height += bgnd_bounds.y - try_bounds.y; |
| 1242 | if ( bgnd_bounds.height < try_bounds.height ) |
| 1243 | bgnd_bounds.height = try_bounds.height; |
| 1244 | bgnd_bounds.y = try_bounds.y; |
| 1245 | } |
| 1246 | else |
| 1247 | { |
| 1248 | try_bounds.height += try_bounds.y - bgnd_bounds.y; |
| 1249 | if ( bgnd_bounds.height < try_bounds.height ) |
| 1250 | bgnd_bounds.height = try_bounds.height; |
| 1251 | } |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1252 | #if DEBUG_OPT_FRAME |
| 1253 | fprintf(stderr, " to : %.20gx%.20g%+.20g%+.20g\n", |
| 1254 | (double) bgnd_bounds.width,(double) bgnd_bounds.height, |
| 1255 | (double) bgnd_bounds.x,(double) bgnd_bounds.y ); |
| 1256 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1257 | } |
| 1258 | ClearBounds(bgnd_image,&bgnd_bounds); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1259 | #if DEBUG_OPT_FRAME |
| 1260 | /* Something strange is happening with a specific animation |
| 1261 | * CompareAnyLayers (normal method) and CompareClearLayers returns the whole |
| 1262 | * image, which is not posibly correct! As verified by previous tests. |
| 1263 | * Something changed beyond the bgnd_bounds clearing. But without being able |
| 1264 | * to see, or writet he image at this point it is hard to tell what is wrong! |
| 1265 | * Only CompareOverlay seemed to return something sensible. |
| 1266 | */ |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1267 | try_bounds=CompareImageBounds(bgnd_image,curr,CompareClearLayer,exception); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1268 | fprintf(stderr, "expand_ctst: %.20gx%.20g%+.20g%+.20g\n", |
| 1269 | (double) try_bounds.width,(double) try_bounds.height, |
| 1270 | (double) try_bounds.x,(double) try_bounds.y ); |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1271 | try_bounds=CompareImageBounds(bgnd_image,curr,CompareAnyLayer,exception); |
| 1272 | try_cleared=IsBoundsCleared(bgnd_image,curr,&try_bounds,exception); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1273 | fprintf(stderr, "expand_any : %.20gx%.20g%+.20g%+.20g%s\n", |
| 1274 | (double) try_bounds.width,(double) try_bounds.height, |
| 1275 | (double) try_bounds.x,(double) try_bounds.y, |
| 1276 | try_cleared?" (pixels cleared)":""); |
| 1277 | #endif |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1278 | try_bounds=CompareImageBounds(bgnd_image,curr,CompareOverlayLayer,exception); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1279 | #if DEBUG_OPT_FRAME |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1280 | try_cleared=IsBoundsCleared(bgnd_image,curr,&try_bounds,exception); |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1281 | fprintf(stderr, "expand_test: %.20gx%.20g%+.20g%+.20g%s\n", |
| 1282 | (double) try_bounds.width,(double) try_bounds.height, |
| 1283 | (double) try_bounds.x,(double) try_bounds.y, |
| 1284 | try_cleared?" (pixels cleared)":""); |
| 1285 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1286 | } |
| 1287 | /* |
| 1288 | Test if this background dispose is smaller than any of the |
| 1289 | other methods we tryed before this (including duplicated frame) |
| 1290 | */ |
| 1291 | if ( cleared || |
| 1292 | bgnd_bounds.width*bgnd_bounds.height |
| 1293 | +try_bounds.width*try_bounds.height |
| 1294 | < bounds[i-1].width*bounds[i-1].height |
| 1295 | +dup_bounds.width*dup_bounds.height |
| 1296 | +bounds[i].width*bounds[i].height ) |
| 1297 | { |
| 1298 | cleared=MagickFalse; |
| 1299 | bounds[i-1]=bgnd_bounds; |
| 1300 | bounds[i]=try_bounds; |
| 1301 | if ( disposals[i-1] == DupDispose ) |
| 1302 | dup_image=DestroyImage(dup_image); |
| 1303 | disposals[i-1]=BackgroundDispose; |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1304 | #if DEBUG_OPT_FRAME |
| 1305 | fprintf(stderr, "expand_bgnd: accepted\n"); |
| 1306 | } else { |
| 1307 | fprintf(stderr, "expand_bgnd: reject\n"); |
| 1308 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1309 | } |
| 1310 | } |
| 1311 | /* |
| 1312 | Finalise choice of dispose, set new prev_image, |
| 1313 | and junk any extra images as appropriate, |
| 1314 | */ |
| 1315 | if ( disposals[i-1] == DupDispose ) |
| 1316 | { |
| 1317 | if (bgnd_image != (Image *) NULL) |
| 1318 | bgnd_image=DestroyImage(bgnd_image); |
| 1319 | prev_image=DestroyImage(prev_image); |
| 1320 | prev_image=dup_image, dup_image=(Image *) NULL; |
| 1321 | bounds[i+1]=bounds[i]; |
| 1322 | bounds[i]=dup_bounds; |
| 1323 | disposals[i-1]=DupDispose; |
| 1324 | disposals[i]=BackgroundDispose; |
| 1325 | i++; |
| 1326 | } |
| 1327 | else |
| 1328 | { |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1329 | if ( dup_image != (Image *) NULL) |
| 1330 | dup_image=DestroyImage(dup_image); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1331 | if ( disposals[i-1] != PreviousDispose ) |
| 1332 | prev_image=DestroyImage(prev_image); |
| 1333 | if ( disposals[i-1] == BackgroundDispose ) |
| 1334 | prev_image=bgnd_image, bgnd_image=(Image *)NULL; |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1335 | if (bgnd_image != (Image *) NULL) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1336 | bgnd_image=DestroyImage(bgnd_image); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1337 | if ( disposals[i-1] == NoneDispose ) |
| 1338 | { |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1339 | prev_image=CloneImage(curr->previous,curr->previous->page.width, |
| 1340 | curr->previous->page.height,MagickTrue,exception); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1341 | if (prev_image == (Image *) NULL) |
| 1342 | { |
| 1343 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 1344 | disposals=(DisposeType *) RelinquishMagickMemory(disposals); |
| 1345 | return((Image *) NULL); |
| 1346 | } |
| 1347 | } |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1348 | |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1349 | } |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1350 | assert(prev_image != (Image *) NULL); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1351 | disposals[i]=disposals[i-1]; |
anthony | 9d57002 | 2010-09-11 07:18:35 +0000 | [diff] [blame] | 1352 | #if DEBUG_OPT_FRAME |
| 1353 | fprintf(stderr, "final %.20g : %s %.20gx%.20g%+.20g%+.20g\n", |
| 1354 | (double) i-1, |
| 1355 | MagickOptionToMnemonic(MagickDisposeOptions, disposals[i-1]), |
| 1356 | (double) bounds[i-1].width, (double) bounds[i-1].height, |
| 1357 | (double) bounds[i-1].x, (double) bounds[i-1].y ); |
| 1358 | #endif |
| 1359 | #if DEBUG_OPT_FRAME |
| 1360 | fprintf(stderr, "interum %.20g : %s %.20gx%.20g%+.20g%+.20g\n", |
| 1361 | (double) i, |
| 1362 | MagickOptionToMnemonic(MagickDisposeOptions, disposals[i]), |
| 1363 | (double) bounds[i].width, (double) bounds[i].height, |
| 1364 | (double) bounds[i].x, (double) bounds[i].y ); |
| 1365 | fprintf(stderr, "\n"); |
| 1366 | #endif |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1367 | i++; |
| 1368 | } |
| 1369 | prev_image=DestroyImage(prev_image); |
| 1370 | /* |
| 1371 | Optimize all images in sequence. |
| 1372 | */ |
| 1373 | sans_exception=AcquireExceptionInfo(); |
| 1374 | i=0; |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1375 | curr=GetFirstImageInList(image); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1376 | optimized_image=NewImageList(); |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1377 | while ( curr != (const Image *) NULL ) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1378 | { |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1379 | prev_image=CloneImage(curr,0,0,MagickTrue,exception); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1380 | if (prev_image == (Image *) NULL) |
| 1381 | break; |
| 1382 | if ( disposals[i] == DelDispose ) { |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 1383 | size_t time = 0; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1384 | while ( disposals[i] == DelDispose ) { |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1385 | time += curr->delay*1000/curr->ticks_per_second; |
| 1386 | curr=GetNextImageInList(curr); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1387 | i++; |
| 1388 | } |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1389 | time += curr->delay*1000/curr->ticks_per_second; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1390 | prev_image->ticks_per_second = 100L; |
| 1391 | prev_image->delay = time*prev_image->ticks_per_second/1000; |
| 1392 | } |
| 1393 | bgnd_image=CropImage(prev_image,&bounds[i],sans_exception); |
| 1394 | prev_image=DestroyImage(prev_image); |
| 1395 | if (bgnd_image == (Image *) NULL) |
| 1396 | break; |
| 1397 | bgnd_image->dispose=disposals[i]; |
| 1398 | if ( disposals[i] == DupDispose ) { |
| 1399 | bgnd_image->delay=0; |
| 1400 | bgnd_image->dispose=NoneDispose; |
| 1401 | } |
| 1402 | else |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1403 | curr=GetNextImageInList(curr); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1404 | AppendImageToList(&optimized_image,bgnd_image); |
| 1405 | i++; |
| 1406 | } |
| 1407 | sans_exception=DestroyExceptionInfo(sans_exception); |
| 1408 | bounds=(RectangleInfo *) RelinquishMagickMemory(bounds); |
| 1409 | disposals=(DisposeType *) RelinquishMagickMemory(disposals); |
anthony | b6d08c5 | 2010-09-13 01:17:04 +0000 | [diff] [blame] | 1410 | if (curr != (Image *) NULL) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1411 | { |
| 1412 | optimized_image=DestroyImageList(optimized_image); |
| 1413 | return((Image *) NULL); |
| 1414 | } |
| 1415 | return(GetFirstImageInList(optimized_image)); |
| 1416 | } |
| 1417 | |
| 1418 | /* |
| 1419 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1420 | % % |
| 1421 | % % |
| 1422 | % % |
| 1423 | % O p t i m i z e I m a g e L a y e r s % |
| 1424 | % % |
| 1425 | % % |
| 1426 | % % |
| 1427 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1428 | % |
| 1429 | % OptimizeImageLayers() compares each image the GIF disposed forms of the |
| 1430 | % previous image in the sequence. From this it attempts to select the |
| 1431 | % smallest cropped image to replace each frame, while preserving the results |
| 1432 | % of the GIF animation. |
| 1433 | % |
| 1434 | % The format of the OptimizeImageLayers method is: |
| 1435 | % |
| 1436 | % Image *OptimizeImageLayers(const Image *image, |
| 1437 | % ExceptionInfo *exception) |
| 1438 | % |
| 1439 | % A description of each parameter follows: |
| 1440 | % |
| 1441 | % o image: the image. |
| 1442 | % |
| 1443 | % o exception: return any errors or warnings in this structure. |
| 1444 | % |
| 1445 | */ |
| 1446 | MagickExport Image *OptimizeImageLayers(const Image *image, |
| 1447 | ExceptionInfo *exception) |
| 1448 | { |
| 1449 | return(OptimizeLayerFrames(image,OptimizeImageLayer,exception)); |
| 1450 | } |
| 1451 | |
| 1452 | /* |
| 1453 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1454 | % % |
| 1455 | % % |
| 1456 | % % |
| 1457 | % O p t i m i z e P l u s I m a g e L a y e r s % |
| 1458 | % % |
| 1459 | % % |
| 1460 | % % |
| 1461 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1462 | % |
| 1463 | % OptimizeImagePlusLayers() is exactly as OptimizeImageLayers(), but may |
| 1464 | % also add or even remove extra frames in the animation, if it improves |
| 1465 | % the total number of pixels in the resulting GIF animation. |
| 1466 | % |
| 1467 | % The format of the OptimizePlusImageLayers method is: |
| 1468 | % |
| 1469 | % Image *OptimizePlusImageLayers(const Image *image, |
| 1470 | % ExceptionInfo *exception) |
| 1471 | % |
| 1472 | % A description of each parameter follows: |
| 1473 | % |
| 1474 | % o image: the image. |
| 1475 | % |
| 1476 | % o exception: return any errors or warnings in this structure. |
| 1477 | % |
| 1478 | */ |
| 1479 | MagickExport Image *OptimizePlusImageLayers(const Image *image, |
| 1480 | ExceptionInfo *exception) |
| 1481 | { |
| 1482 | return OptimizeLayerFrames(image, OptimizePlusLayer, exception); |
| 1483 | } |
| 1484 | |
| 1485 | /* |
| 1486 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1487 | % % |
| 1488 | % % |
| 1489 | % % |
| 1490 | % O p t i m i z e I m a g e T r a n s p a r e n c y % |
| 1491 | % % |
| 1492 | % % |
| 1493 | % % |
| 1494 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1495 | % |
| 1496 | % OptimizeImageTransparency() takes a frame optimized GIF animation, and |
| 1497 | % compares the overlayed pixels against the disposal image resulting from all |
| 1498 | % the previous frames in the animation. Any pixel that does not change the |
| 1499 | % disposal image (and thus does not effect the outcome of an overlay) is made |
| 1500 | % transparent. |
| 1501 | % |
| 1502 | % WARNING: This modifies the current images directly, rather than generate |
| 1503 | % a new image sequence. |
| 1504 | % |
| 1505 | % The format of the OptimizeImageTransperency method is: |
| 1506 | % |
| 1507 | % void OptimizeImageTransperency(Image *image,ExceptionInfo *exception) |
| 1508 | % |
| 1509 | % A description of each parameter follows: |
| 1510 | % |
| 1511 | % o image: the image sequence |
| 1512 | % |
| 1513 | % o exception: return any errors or warnings in this structure. |
| 1514 | % |
| 1515 | */ |
| 1516 | MagickExport void OptimizeImageTransparency(const Image *image, |
| 1517 | ExceptionInfo *exception) |
| 1518 | { |
| 1519 | Image |
| 1520 | *dispose_image; |
| 1521 | |
| 1522 | register Image |
| 1523 | *next; |
| 1524 | |
| 1525 | /* |
| 1526 | Run the image through the animation sequence |
| 1527 | */ |
| 1528 | assert(image != (Image *) NULL); |
| 1529 | assert(image->signature == MagickSignature); |
| 1530 | if (image->debug != MagickFalse) |
| 1531 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 1532 | assert(exception != (ExceptionInfo *) NULL); |
| 1533 | assert(exception->signature == MagickSignature); |
| 1534 | next=GetFirstImageInList(image); |
| 1535 | dispose_image=CloneImage(next,next->page.width,next->page.height, |
| 1536 | MagickTrue,exception); |
| 1537 | if (dispose_image == (Image *) NULL) |
| 1538 | return; |
| 1539 | dispose_image->page=next->page; |
| 1540 | dispose_image->page.x=0; |
| 1541 | dispose_image->page.y=0; |
| 1542 | dispose_image->dispose=NoneDispose; |
| 1543 | dispose_image->background_color.opacity=(Quantum) TransparentOpacity; |
| 1544 | (void) SetImageBackgroundColor(dispose_image); |
| 1545 | |
| 1546 | while ( next != (Image *) NULL ) |
| 1547 | { |
| 1548 | Image |
| 1549 | *current_image; |
| 1550 | |
| 1551 | /* |
| 1552 | Overlay this frame's image over the previous disposal image |
| 1553 | */ |
| 1554 | current_image=CloneImage(dispose_image,0,0,MagickTrue,exception); |
| 1555 | if (current_image == (Image *) NULL) |
| 1556 | { |
| 1557 | dispose_image=DestroyImage(dispose_image); |
| 1558 | return; |
| 1559 | } |
| 1560 | (void) CompositeImage(current_image,next->matte != MagickFalse ? |
| 1561 | OverCompositeOp : CopyCompositeOp, next,next->page.x,next->page.y); |
| 1562 | /* |
| 1563 | At this point the image would be displayed, for the delay period |
| 1564 | ** |
| 1565 | Work out the disposal of the previous image |
| 1566 | */ |
| 1567 | if (next->dispose == BackgroundDispose) |
| 1568 | { |
| 1569 | RectangleInfo |
| 1570 | bounds=next->page; |
| 1571 | |
| 1572 | bounds.width=next->columns; |
| 1573 | bounds.height=next->rows; |
| 1574 | if (bounds.x < 0) |
| 1575 | { |
| 1576 | bounds.width+=bounds.x; |
| 1577 | bounds.x=0; |
| 1578 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 1579 | if ((ssize_t) (bounds.x+bounds.width) > (ssize_t) current_image->columns) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1580 | bounds.width=current_image->columns-bounds.x; |
| 1581 | if (bounds.y < 0) |
| 1582 | { |
| 1583 | bounds.height+=bounds.y; |
| 1584 | bounds.y=0; |
| 1585 | } |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 1586 | if ((ssize_t) (bounds.y+bounds.height) > (ssize_t) current_image->rows) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1587 | bounds.height=current_image->rows-bounds.y; |
| 1588 | ClearBounds(current_image, &bounds); |
| 1589 | } |
| 1590 | if (next->dispose != PreviousDispose) |
| 1591 | { |
| 1592 | dispose_image=DestroyImage(dispose_image); |
| 1593 | dispose_image=current_image; |
| 1594 | } |
| 1595 | else |
| 1596 | current_image=DestroyImage(current_image); |
| 1597 | |
| 1598 | /* |
| 1599 | Optimize Transparency of the next frame (if present) |
| 1600 | */ |
| 1601 | next=GetNextImageInList(next); |
| 1602 | if ( next != (Image *) NULL ) { |
| 1603 | (void) CompositeImage(next, ChangeMaskCompositeOp, |
| 1604 | dispose_image, -(next->page.x), -(next->page.y) ); |
| 1605 | } |
| 1606 | } |
| 1607 | dispose_image=DestroyImage(dispose_image); |
| 1608 | return; |
| 1609 | } |
| 1610 | |
| 1611 | /* |
| 1612 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1613 | % % |
| 1614 | % % |
| 1615 | % % |
| 1616 | % R e m o v e D u p l i c a t e L a y e r s % |
| 1617 | % % |
| 1618 | % % |
| 1619 | % % |
| 1620 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1621 | % |
| 1622 | % RemoveDuplicateLayers() removes any image that is exactly the same as the |
| 1623 | % next image in the given image list. Image size and virtual canvas offset |
| 1624 | % must also match, though not the virtual canvas size itself. |
| 1625 | % |
| 1626 | % No check is made with regards to image disposal setting, though it is the |
| 1627 | % dispose setting of later image that is kept. Also any time delays are also |
| 1628 | % added together. As such coalesced image animations should still produce the |
| 1629 | % same result, though with duplicte frames merged into a single frame. |
| 1630 | % |
| 1631 | % The format of the RemoveDuplicateLayers method is: |
| 1632 | % |
| 1633 | % void RemoveDuplicateLayers(Image **image, ExceptionInfo *exception) |
| 1634 | % |
| 1635 | % A description of each parameter follows: |
| 1636 | % |
| 1637 | % o images: the image list |
| 1638 | % |
| 1639 | % o exception: return any errors or warnings in this structure. |
| 1640 | % |
| 1641 | */ |
| 1642 | MagickExport void RemoveDuplicateLayers(Image **images, |
| 1643 | ExceptionInfo *exception) |
| 1644 | { |
| 1645 | register Image |
| 1646 | *curr, |
| 1647 | *next; |
| 1648 | |
| 1649 | RectangleInfo |
| 1650 | bounds; |
| 1651 | |
| 1652 | assert((*images) != (const Image *) NULL); |
| 1653 | assert((*images)->signature == MagickSignature); |
| 1654 | if ((*images)->debug != MagickFalse) |
| 1655 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",(*images)->filename); |
| 1656 | assert(exception != (ExceptionInfo *) NULL); |
| 1657 | assert(exception->signature == MagickSignature); |
| 1658 | |
| 1659 | curr=GetFirstImageInList(*images); |
| 1660 | for (; (next=GetNextImageInList(curr)) != (Image *) NULL; curr=next) |
| 1661 | { |
| 1662 | if ( curr->columns != next->columns || curr->rows != next->rows |
| 1663 | || curr->page.x != next->page.x || curr->page.y != next->page.y ) |
| 1664 | continue; |
| 1665 | bounds=CompareImageBounds(curr,next,CompareAnyLayer,exception); |
| 1666 | if ( bounds.x < 0 ) { |
| 1667 | /* |
| 1668 | the two images are the same, merge time delays and delete one. |
| 1669 | */ |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 1670 | size_t time; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1671 | time = curr->delay*1000/curr->ticks_per_second; |
| 1672 | time += next->delay*1000/next->ticks_per_second; |
| 1673 | next->ticks_per_second = 100L; |
| 1674 | next->delay = time*curr->ticks_per_second/1000; |
| 1675 | next->iterations = curr->iterations; |
| 1676 | *images = curr; |
| 1677 | (void) DeleteImageFromList(images); |
| 1678 | } |
| 1679 | } |
| 1680 | *images = GetFirstImageInList(*images); |
| 1681 | } |
| 1682 | |
| 1683 | /* |
| 1684 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1685 | % % |
| 1686 | % % |
| 1687 | % % |
| 1688 | % R e m o v e Z e r o D e l a y L a y e r s % |
| 1689 | % % |
| 1690 | % % |
| 1691 | % % |
| 1692 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1693 | % |
| 1694 | % RemoveZeroDelayLayers() removes any image that as a zero delay time. Such |
| 1695 | % images generally represent intermediate or partial updates in GIF |
| 1696 | % animations used for file optimization. They are not ment to be displayed |
| 1697 | % to users of the animation. Viewable images in an animation should have a |
| 1698 | % time delay of 3 or more centi-seconds (hundredths of a second). |
| 1699 | % |
| 1700 | % However if all the frames have a zero time delay, then either the animation |
| 1701 | % is as yet incomplete, or it is not a GIF animation. This a non-sensible |
| 1702 | % situation, so no image will be removed and a 'Zero Time Animation' warning |
| 1703 | % (exception) given. |
| 1704 | % |
| 1705 | % No warning will be given if no image was removed because all images had an |
| 1706 | % appropriate non-zero time delay set. |
| 1707 | % |
| 1708 | % Due to the special requirements of GIF disposal handling, GIF animations |
| 1709 | % should be coalesced first, before calling this function, though that is not |
| 1710 | % a requirement. |
| 1711 | % |
| 1712 | % The format of the RemoveZeroDelayLayers method is: |
| 1713 | % |
| 1714 | % void RemoveZeroDelayLayers(Image **image, ExceptionInfo *exception) |
| 1715 | % |
| 1716 | % A description of each parameter follows: |
| 1717 | % |
| 1718 | % o images: the image list |
| 1719 | % |
| 1720 | % o exception: return any errors or warnings in this structure. |
| 1721 | % |
| 1722 | */ |
| 1723 | MagickExport void RemoveZeroDelayLayers(Image **images, |
| 1724 | ExceptionInfo *exception) |
| 1725 | { |
| 1726 | Image |
| 1727 | *i; |
| 1728 | |
| 1729 | assert((*images) != (const Image *) NULL); |
| 1730 | assert((*images)->signature == MagickSignature); |
| 1731 | if ((*images)->debug != MagickFalse) |
| 1732 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",(*images)->filename); |
| 1733 | assert(exception != (ExceptionInfo *) NULL); |
| 1734 | assert(exception->signature == MagickSignature); |
| 1735 | |
| 1736 | i=GetFirstImageInList(*images); |
| 1737 | for ( ; i != (Image *) NULL; i=GetNextImageInList(i)) |
| 1738 | if ( i->delay != 0L ) break; |
| 1739 | if ( i == (Image *) NULL ) { |
| 1740 | (void) ThrowMagickException(exception,GetMagickModule(),OptionWarning, |
| 1741 | "ZeroTimeAnimation","`%s'",GetFirstImageInList(*images)->filename); |
| 1742 | return; |
| 1743 | } |
| 1744 | i=GetFirstImageInList(*images); |
| 1745 | while ( i != (Image *) NULL ) |
| 1746 | { |
| 1747 | if ( i->delay == 0L ) { |
| 1748 | (void) DeleteImageFromList(&i); |
| 1749 | *images=i; |
| 1750 | } |
| 1751 | else |
| 1752 | i=GetNextImageInList(i); |
| 1753 | } |
| 1754 | *images=GetFirstImageInList(*images); |
| 1755 | } |
| 1756 | |
| 1757 | /* |
| 1758 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1759 | % % |
| 1760 | % % |
| 1761 | % % |
| 1762 | % C o m p o s i t e L a y e r s % |
| 1763 | % % |
| 1764 | % % |
| 1765 | % % |
| 1766 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1767 | % |
| 1768 | % CompositeLayers() compose first image sequence (source) over the second |
| 1769 | % image sequence (destination), using the given compose method and offsets. |
| 1770 | % |
| 1771 | % The pointers to the image list does not have to be the start of that image |
| 1772 | % list, but may start somewhere in the middle. Each layer from the two image |
| 1773 | % lists are composted together until the end of one of the image lists is |
| 1774 | % reached. The offset of each composition is also adjusted to match the |
| 1775 | % virtual canvas offsets of each layer. As such the given offset is relative |
| 1776 | % to the virtual canvas, and not the actual image. |
| 1777 | % |
| 1778 | % No GIF disposal handling is performed, so GIF animations should be |
| 1779 | % coalesced before use. However this not a requirement, and individual |
| 1780 | % layer images may have any size or offset, for special compositions. |
| 1781 | % |
| 1782 | % Special case:- If one of the image sequences is just a single image that |
| 1783 | % image is repeatally composed with all the images in the other image list. |
| 1784 | % Either the source or destination lists may be the single image, for this |
| 1785 | % situation. |
| 1786 | % |
| 1787 | % The destination list will be expanded as needed to match number of source |
| 1788 | % image overlaid (from current position to end of list). |
| 1789 | % |
| 1790 | % The format of the CompositeLayers method is: |
| 1791 | % |
| 1792 | % void CompositeLayers(Image *destination, |
| 1793 | % const CompositeOperator compose, Image *source, |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 1794 | % const ssize_t x_offset, const ssize_t y_offset, |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1795 | % ExceptionInfo *exception); |
| 1796 | % |
| 1797 | % A description of each parameter follows: |
| 1798 | % |
| 1799 | % o destination: the destination images and results |
| 1800 | % |
| 1801 | % o source: source image(s) for the layer composition |
| 1802 | % |
| 1803 | % o compose, x_offset, y_offset: arguments passed on to CompositeImages() |
| 1804 | % |
| 1805 | % o exception: return any errors or warnings in this structure. |
| 1806 | % |
| 1807 | */ |
| 1808 | static inline void CompositeCanvas(Image *destination, |
cristy | 9d314ff | 2011-03-09 01:30:28 +0000 | [diff] [blame] | 1809 | const CompositeOperator compose, Image *source,ssize_t x_offset, |
| 1810 | ssize_t y_offset ) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1811 | { |
cristy | 9d314ff | 2011-03-09 01:30:28 +0000 | [diff] [blame] | 1812 | x_offset+=source->page.x-destination->page.x; |
| 1813 | y_offset+=source->page.y-destination->page.y; |
| 1814 | (void) CompositeImage(destination,compose,source,x_offset,y_offset); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1815 | } |
| 1816 | |
| 1817 | MagickExport void CompositeLayers(Image *destination, |
cristy | 9d314ff | 2011-03-09 01:30:28 +0000 | [diff] [blame] | 1818 | const CompositeOperator compose, Image *source,const ssize_t x_offset, |
| 1819 | const ssize_t y_offset,ExceptionInfo *exception) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1820 | { |
| 1821 | assert(destination != (Image *) NULL); |
| 1822 | assert(destination->signature == MagickSignature); |
| 1823 | assert(source != (Image *) NULL); |
| 1824 | assert(source->signature == MagickSignature); |
| 1825 | assert(exception != (ExceptionInfo *) NULL); |
| 1826 | assert(exception->signature == MagickSignature); |
| 1827 | if (source->debug != MagickFalse || destination->debug != MagickFalse) |
| 1828 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s - %s", |
| 1829 | source->filename, destination->filename); |
| 1830 | |
| 1831 | /* |
| 1832 | Overlay single source image over destation image/list |
| 1833 | */ |
| 1834 | if ( source->previous == (Image *) NULL && source->next == (Image *) NULL ) |
| 1835 | while ( destination != (Image *) NULL ) |
| 1836 | { |
| 1837 | CompositeCanvas(destination, compose, source, x_offset, y_offset); |
| 1838 | destination=GetNextImageInList(destination); |
| 1839 | } |
| 1840 | |
| 1841 | /* |
| 1842 | Overlay source image list over single destination |
| 1843 | Generating multiple clones of destination image to match source list. |
| 1844 | Original Destination image becomes first image of generated list. |
| 1845 | As such the image list pointer does not require any change in caller. |
| 1846 | Some animation attributes however also needs coping in this case. |
| 1847 | */ |
| 1848 | else if ( destination->previous == (Image *) NULL && |
| 1849 | destination->next == (Image *) NULL ) |
| 1850 | { |
| 1851 | Image *dest = CloneImage(destination,0,0,MagickTrue,exception); |
| 1852 | |
| 1853 | CompositeCanvas(destination, compose, source, x_offset, y_offset); |
| 1854 | /* copy source image attributes ? */ |
| 1855 | source=GetNextImageInList(source); |
| 1856 | |
| 1857 | while ( source != (Image *) NULL ) |
| 1858 | { |
| 1859 | AppendImageToList(&destination, |
| 1860 | CloneImage(dest,0,0,MagickTrue,exception)); |
| 1861 | destination=GetLastImageInList(destination); |
| 1862 | |
| 1863 | CompositeCanvas(destination, compose, source, x_offset, y_offset); |
| 1864 | destination->delay = source->delay; |
| 1865 | destination->iterations = source->iterations; |
| 1866 | source=GetNextImageInList(source); |
| 1867 | } |
| 1868 | dest=DestroyImage(dest); |
| 1869 | } |
| 1870 | |
| 1871 | /* |
| 1872 | Overlay a source image list over a destination image list |
| 1873 | until either list runs out of images. (Does not repeat) |
| 1874 | */ |
| 1875 | else |
| 1876 | while ( source != (Image *) NULL && destination != (Image *) NULL ) |
| 1877 | { |
| 1878 | CompositeCanvas(destination, compose, source, x_offset, y_offset); |
| 1879 | source=GetNextImageInList(source); |
| 1880 | destination=GetNextImageInList(destination); |
| 1881 | } |
| 1882 | } |
| 1883 | |
| 1884 | /* |
| 1885 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1886 | % % |
| 1887 | % % |
| 1888 | % % |
| 1889 | % M e r g e I m a g e L a y e r s % |
| 1890 | % % |
| 1891 | % % |
| 1892 | % % |
| 1893 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 1894 | % |
| 1895 | % MergeImageLayers() composes all the image layers from the current given |
| 1896 | % image onward to produce a single image of the merged layers. |
| 1897 | % |
| 1898 | % The inital canvas's size depends on the given ImageLayerMethod, and is |
| 1899 | % initialized using the first images background color. The images |
| 1900 | % are then compositied onto that image in sequence using the given |
| 1901 | % composition that has been assigned to each individual image. |
| 1902 | % |
| 1903 | % The format of the MergeImageLayers is: |
| 1904 | % |
| 1905 | % Image *MergeImageLayers(const Image *image, |
| 1906 | % const ImageLayerMethod method, ExceptionInfo *exception) |
| 1907 | % |
| 1908 | % A description of each parameter follows: |
| 1909 | % |
| 1910 | % o image: the image list to be composited together |
| 1911 | % |
| 1912 | % o method: the method of selecting the size of the initial canvas. |
| 1913 | % |
| 1914 | % MergeLayer: Merge all layers onto a canvas just large enough |
| 1915 | % to hold all the actual images. The virtual canvas of the |
| 1916 | % first image is preserved but otherwise ignored. |
| 1917 | % |
| 1918 | % FlattenLayer: Use the virtual canvas size of first image. |
| 1919 | % Images which fall outside this canvas is clipped. |
| 1920 | % This can be used to 'fill out' a given virtual canvas. |
| 1921 | % |
| 1922 | % MosaicLayer: Start with the virtual canvas of the first image, |
| 1923 | % enlarging left and right edges to contain all images. |
| 1924 | % Images with negative offsets will be clipped. |
| 1925 | % |
| 1926 | % TrimBoundsLayer: Determine the overall bounds of all the image |
| 1927 | % layers just as in "MergeLayer", then adjust the the canvas |
| 1928 | % and offsets to be relative to those bounds, without overlaying |
| 1929 | % the images. |
| 1930 | % |
| 1931 | % WARNING: a new image is not returned, the original image |
| 1932 | % sequence page data is modified instead. |
| 1933 | % |
| 1934 | % o exception: return any errors or warnings in this structure. |
| 1935 | % |
| 1936 | */ |
| 1937 | MagickExport Image *MergeImageLayers(Image *image, |
| 1938 | const ImageLayerMethod method,ExceptionInfo *exception) |
| 1939 | { |
| 1940 | #define MergeLayersTag "Merge/Layers" |
| 1941 | |
| 1942 | Image |
| 1943 | *canvas; |
| 1944 | |
| 1945 | MagickBooleanType |
| 1946 | proceed; |
| 1947 | |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1948 | RectangleInfo |
| 1949 | page; |
| 1950 | |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1951 | register const Image |
| 1952 | *next; |
| 1953 | |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 1954 | size_t |
cristy | cee9711 | 2010-05-28 00:44:52 +0000 | [diff] [blame] | 1955 | number_images, |
| 1956 | height, |
| 1957 | width; |
| 1958 | |
| 1959 | ssize_t |
| 1960 | scene; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1961 | |
| 1962 | assert(image != (Image *) NULL); |
| 1963 | assert(image->signature == MagickSignature); |
| 1964 | if (image->debug != MagickFalse) |
| 1965 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 1966 | assert(exception != (ExceptionInfo *) NULL); |
| 1967 | assert(exception->signature == MagickSignature); |
| 1968 | /* |
| 1969 | Determine canvas image size, and its virtual canvas size and offset |
| 1970 | */ |
| 1971 | page=image->page; |
| 1972 | width=image->columns; |
| 1973 | height=image->rows; |
| 1974 | switch (method) |
| 1975 | { |
| 1976 | case TrimBoundsLayer: |
| 1977 | case MergeLayer: |
| 1978 | default: |
| 1979 | { |
| 1980 | next = GetNextImageInList(image); |
| 1981 | for ( ; next != (Image *) NULL; next=GetNextImageInList(next)) { |
| 1982 | if ( page.x > next->page.x ) { |
| 1983 | width += page.x-next->page.x; |
| 1984 | page.x = next->page.x; |
| 1985 | } |
| 1986 | if ( page.y > next->page.y ) { |
| 1987 | height += page.y-next->page.y; |
| 1988 | page.y = next->page.y; |
| 1989 | } |
cristy | 55a91cd | 2010-12-01 00:57:40 +0000 | [diff] [blame] | 1990 | if ( (ssize_t) width < (next->page.x + next->columns - page.x) ) |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 1991 | width = (size_t) next->page.x + next->columns - page.x; |
cristy | 55a91cd | 2010-12-01 00:57:40 +0000 | [diff] [blame] | 1992 | if ( (ssize_t) height < (next->page.y + next->rows - page.y) ) |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 1993 | height = (size_t) next->page.y + next->rows - page.y; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1994 | } |
| 1995 | break; |
| 1996 | } |
| 1997 | case FlattenLayer: |
| 1998 | { |
| 1999 | if ( page.width > 0 ) |
| 2000 | width=page.width; |
| 2001 | if ( page.height > 0 ) |
| 2002 | height=page.height; |
| 2003 | page.x=0; |
| 2004 | page.y=0; |
| 2005 | break; |
| 2006 | } |
| 2007 | case MosaicLayer: |
| 2008 | { |
| 2009 | if ( page.width > 0 ) |
| 2010 | width=page.width; |
| 2011 | if ( page.height > 0 ) |
| 2012 | height=page.height; |
| 2013 | for (next=image; next != (Image *) NULL; next=GetNextImageInList(next)) { |
| 2014 | if (method == MosaicLayer) { |
| 2015 | page.x=next->page.x; |
| 2016 | page.y=next->page.y; |
cristy | 55a91cd | 2010-12-01 00:57:40 +0000 | [diff] [blame] | 2017 | if ( (ssize_t) width < (next->page.x + next->columns) ) |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 2018 | width = (size_t) next->page.x + next->columns; |
cristy | 55a91cd | 2010-12-01 00:57:40 +0000 | [diff] [blame] | 2019 | if ( (ssize_t) height < (next->page.y + next->rows) ) |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 2020 | height = (size_t) next->page.y + next->rows; |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 2021 | } |
| 2022 | } |
| 2023 | page.width=width; |
| 2024 | page.height=height; |
| 2025 | page.x=0; |
| 2026 | page.y=0; |
| 2027 | } |
| 2028 | break; |
| 2029 | } |
| 2030 | /* set virtual canvas size if not defined */ |
| 2031 | if ( page.width == 0 ) |
| 2032 | page.width = (page.x < 0) ? width : width+page.x; |
| 2033 | if ( page.height == 0 ) |
| 2034 | page.height = (page.y < 0) ? height : height+page.y; |
| 2035 | |
| 2036 | /* |
glennrp | 1e7f7bc | 2011-03-02 19:25:28 +0000 | [diff] [blame] | 2037 | Handle "TrimBoundsLayer" method separately to normal 'layer merge' |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 2038 | */ |
| 2039 | if ( method == TrimBoundsLayer ) { |
| 2040 | number_images=GetImageListLength(image); |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 2041 | for (scene=0; scene < (ssize_t) number_images; scene++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 2042 | { |
| 2043 | image->page.x -= page.x; |
| 2044 | image->page.y -= page.y; |
| 2045 | image->page.width = width; |
| 2046 | image->page.height = height; |
cristy | 4205a3c | 2010-09-12 20:19:59 +0000 | [diff] [blame] | 2047 | proceed=SetImageProgress(image,MergeLayersTag,(MagickOffsetType) scene, |
| 2048 | number_images); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 2049 | if (proceed == MagickFalse) |
| 2050 | break; |
| 2051 | image=GetNextImageInList(image); |
| 2052 | } |
| 2053 | return((Image *) NULL); |
| 2054 | } |
| 2055 | |
| 2056 | /* |
| 2057 | Create canvas size of width and height, and background color. |
| 2058 | */ |
| 2059 | canvas=CloneImage(image,width,height,MagickTrue,exception); |
| 2060 | if (canvas == (Image *) NULL) |
| 2061 | return((Image *) NULL); |
| 2062 | (void) SetImageBackgroundColor(canvas); |
| 2063 | canvas->page=page; |
| 2064 | canvas->dispose=UndefinedDispose; |
| 2065 | |
| 2066 | /* |
| 2067 | Compose images onto canvas, with progress monitor |
| 2068 | */ |
| 2069 | number_images=GetImageListLength(image); |
cristy | bb50337 | 2010-05-27 20:51:26 +0000 | [diff] [blame] | 2070 | for (scene=0; scene < (ssize_t) number_images; scene++) |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 2071 | { |
| 2072 | (void) CompositeImage(canvas,image->compose,image,image->page.x- |
| 2073 | canvas->page.x,image->page.y-canvas->page.y); |
cristy | cee9711 | 2010-05-28 00:44:52 +0000 | [diff] [blame] | 2074 | proceed=SetImageProgress(image,MergeLayersTag,(MagickOffsetType) scene, |
| 2075 | number_images); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 2076 | if (proceed == MagickFalse) |
| 2077 | break; |
| 2078 | image=GetNextImageInList(image); |
| 2079 | } |
| 2080 | return(canvas); |
| 2081 | } |
| 2082 | |