cristy | d04e7bf | 2012-03-03 19:19:12 +0000 | [diff] [blame] | 1 | /* |
| 2 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3 | % % |
| 4 | % % |
| 5 | % % |
| 6 | % CCCC H H AAA N N N N EEEEE L % |
| 7 | % C H H A A NN N NN N E L % |
| 8 | % C HHHHH AAAAA N N N N N N RRR L % |
| 9 | % C H H A A N NN N NN E L % |
| 10 | % CCCC H H A A N N N N EEEEE LLLLL % |
| 11 | % % |
| 12 | % % |
| 13 | % MagickCore Image Channel Methods % |
| 14 | % % |
| 15 | % Software Design % |
| 16 | % John Cristy % |
| 17 | % December 2003 % |
| 18 | % % |
| 19 | % % |
| 20 | % Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization % |
| 21 | % dedicated to making software imaging solutions freely available. % |
| 22 | % % |
| 23 | % You may not use this file except in compliance with the License. You may % |
| 24 | % obtain a copy of the License at % |
| 25 | % % |
| 26 | % http://www.imagemagick.org/script/license.php % |
| 27 | % % |
| 28 | % Unless required by applicable law or agreed to in writing, software % |
| 29 | % distributed under the License is distributed on an "AS IS" BASIS, % |
| 30 | % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
| 31 | % See the License for the specific language governing permissions and % |
| 32 | % limitations under the License. % |
| 33 | % % |
| 34 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 35 | % |
| 36 | % |
| 37 | % |
| 38 | */ |
| 39 | |
| 40 | /* |
| 41 | Include declarations. |
| 42 | */ |
| 43 | #include "MagickCore/studio.h" |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 44 | #include "MagickCore/image.h" |
| 45 | #include "MagickCore/list.h" |
| 46 | #include "MagickCore/log.h" |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 47 | #include "MagickCore/monitor.h" |
| 48 | #include "MagickCore/monitor-private.h" |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 49 | #include "MagickCore/option.h" |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 50 | #include "MagickCore/pixel-accessor.h" |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 51 | #include "MagickCore/token.h" |
cristy | d04e7bf | 2012-03-03 19:19:12 +0000 | [diff] [blame] | 52 | #include "MagickCore/utility.h" |
| 53 | #include "MagickCore/version.h" |
| 54 | |
| 55 | /* |
| 56 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 57 | % % |
| 58 | % % |
| 59 | % % |
| 60 | % C h a n n e l O p e r a t i o n I m a g e % |
| 61 | % % |
| 62 | % % |
| 63 | % % |
| 64 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 65 | % |
| 66 | % ChannelOperationImage() applies a channel expression to the specified image. |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 67 | % The expression consists of one or more channels, either mnemonic or numeric |
| 68 | % (e.g. red, 1), separated by certain operation symbols as follows: |
| 69 | % |
| 70 | % <=> exchange two channels (e.g. red<=>blue) |
| 71 | % => transfer a channel to another (e.g. red=>green) |
| 72 | % , separate channel operations (e.g. red, green) |
| 73 | % | read channels from next input image (e.g. red | green) |
| 74 | % ; write channels to next output image (e.g. red; green; blue) |
| 75 | % |
| 76 | % A channel without a operation symbol implies extract. For example, to create |
| 77 | % 3 grayscale images from the red, green, and blue channels of an image, use: |
| 78 | % |
| 79 | % -channel-ops "red; green; blue" |
cristy | d04e7bf | 2012-03-03 19:19:12 +0000 | [diff] [blame] | 80 | % |
| 81 | % The format of the ChannelOperationImage method is: |
| 82 | % |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 83 | % Image *ChannelOperationImage(const Image *image, |
cristy | d04e7bf | 2012-03-03 19:19:12 +0000 | [diff] [blame] | 84 | % const char *expression,ExceptionInfo *exception) |
| 85 | % |
| 86 | % A description of each parameter follows: |
| 87 | % |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 88 | % o image: the image. |
cristy | d04e7bf | 2012-03-03 19:19:12 +0000 | [diff] [blame] | 89 | % |
| 90 | % o expression: A channel expression. |
| 91 | % |
| 92 | % o exception: return any errors or warnings in this structure. |
| 93 | % |
| 94 | */ |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 95 | |
| 96 | typedef enum |
| 97 | { |
| 98 | ExtractChannelOp, |
| 99 | ExchangeChannelOp, |
| 100 | TransferChannelOp |
| 101 | } ChannelOperation; |
| 102 | |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 103 | static inline size_t MagickMin(const size_t x,const size_t y) |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 104 | { |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 105 | if (x < y) |
| 106 | return(x); |
| 107 | return(y); |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 108 | } |
| 109 | |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 110 | static MagickBooleanType ChannelImage(Image *destination_image, |
| 111 | const Image *source_image,const ChannelOperation channel_op, |
| 112 | const PixelChannel source_channel,const PixelChannel destination_channel, |
| 113 | ExceptionInfo *exception) |
| 114 | { |
| 115 | CacheView |
| 116 | *source_view, |
| 117 | *destination_view; |
| 118 | |
| 119 | MagickBooleanType |
| 120 | status; |
| 121 | |
| 122 | size_t |
| 123 | height; |
| 124 | |
| 125 | ssize_t |
| 126 | y; |
| 127 | |
| 128 | status=MagickTrue; |
| 129 | source_view=AcquireCacheView(source_image); |
| 130 | destination_view=AcquireCacheView(destination_image); |
| 131 | height=MagickMin(source_image->rows,destination_image->rows); |
| 132 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 133 | #pragma omp parallel for schedule(static) shared(status) |
| 134 | #endif |
| 135 | for (y=0; y < (ssize_t) height; y++) |
| 136 | { |
| 137 | register const Quantum |
| 138 | *restrict p; |
| 139 | |
| 140 | register Quantum |
| 141 | *restrict q; |
| 142 | |
| 143 | register ssize_t |
| 144 | x; |
| 145 | |
| 146 | size_t |
| 147 | width; |
| 148 | |
| 149 | if (status == MagickFalse) |
| 150 | continue; |
| 151 | p=GetCacheViewVirtualPixels(source_view,0,y,source_image->columns,1, |
| 152 | exception); |
| 153 | q=QueueCacheViewAuthenticPixels(destination_view,0,y, |
| 154 | destination_image->columns,1,exception); |
| 155 | if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL)) |
| 156 | { |
| 157 | status=MagickFalse; |
| 158 | continue; |
| 159 | } |
| 160 | width=MagickMin(source_image->columns,destination_image->columns); |
| 161 | for (x=0; x < (ssize_t) width; x++) |
| 162 | { |
| 163 | PixelTrait |
| 164 | destination_traits, |
| 165 | source_traits; |
| 166 | |
| 167 | ssize_t |
| 168 | offset; |
| 169 | |
| 170 | source_traits=GetPixelChannelMapTraits(source_image,source_channel); |
| 171 | destination_traits=GetPixelChannelMapTraits(destination_image, |
| 172 | destination_channel); |
| 173 | if ((source_traits == UndefinedPixelTrait) || |
| 174 | (destination_traits == UndefinedPixelTrait)) |
| 175 | continue; |
| 176 | offset=GetPixelChannelMapOffset(source_image,source_channel); |
| 177 | SetPixelChannel(destination_image,destination_channel,p[offset],q); |
| 178 | p+=GetPixelChannels(source_image); |
| 179 | q+=GetPixelChannels(destination_image); |
| 180 | } |
| 181 | if (SyncCacheViewAuthenticPixels(destination_view,exception) == MagickFalse) |
| 182 | status=MagickFalse; |
| 183 | } |
| 184 | destination_view=DestroyCacheView(destination_view); |
| 185 | source_view=DestroyCacheView(source_view); |
| 186 | return(status); |
| 187 | } |
| 188 | |
| 189 | MagickExport Image *ChannelOperationImage(const Image *image, |
cristy | d04e7bf | 2012-03-03 19:19:12 +0000 | [diff] [blame] | 190 | const char *expression,ExceptionInfo *exception) |
| 191 | { |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 192 | #define ChannelOperationImageTag "ChannelOperation/Image" |
| 193 | |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 194 | char |
| 195 | token[MaxTextExtent]; |
| 196 | |
| 197 | ChannelOperation |
| 198 | channel_op; |
| 199 | |
| 200 | const char |
| 201 | *p; |
| 202 | |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 203 | const Image |
| 204 | *source_image; |
| 205 | |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 206 | Image |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 207 | *destination_image; |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 208 | |
| 209 | PixelChannel |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 210 | source_channel, |
| 211 | destination_channel; |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 212 | |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 213 | ssize_t |
| 214 | channels; |
| 215 | |
| 216 | assert(image != (Image *) NULL); |
| 217 | assert(image->signature == MagickSignature); |
| 218 | if (image->debug != MagickFalse) |
| 219 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 220 | assert(exception != (ExceptionInfo *) NULL); |
| 221 | assert(exception->signature == MagickSignature); |
| 222 | source_image=image; |
| 223 | destination_image=CloneImage(source_image,0,0,MagickTrue,exception); |
| 224 | if (destination_image == (Image *) NULL) |
| 225 | return((Image *) NULL); |
| 226 | if (SetImageBackgroundColor(destination_image,exception) == MagickFalse) |
| 227 | { |
| 228 | destination_image=GetLastImageInList(destination_image); |
| 229 | return((Image *) NULL); |
| 230 | } |
| 231 | if (expression == (const char *) NULL) |
| 232 | return(destination_image); |
| 233 | destination_channel=RedPixelChannel; |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 234 | p=(char *) expression; |
| 235 | GetMagickToken(p,&p,token); |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 236 | for (channels=0; *p != '\0'; ) |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 237 | { |
| 238 | MagickBooleanType |
| 239 | status; |
| 240 | |
| 241 | ssize_t |
| 242 | i; |
| 243 | |
| 244 | /* |
| 245 | Interpret channel expression. |
| 246 | */ |
| 247 | if (*token == ',') |
| 248 | { |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 249 | destination_channel=(PixelChannel) ((ssize_t) destination_channel+1); |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 250 | GetMagickToken(p,&p,token); |
| 251 | } |
| 252 | if (*token == '|') |
| 253 | { |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 254 | if (GetNextImageInList(source_image) != (Image *) NULL) |
| 255 | source_image=GetNextImageInList(source_image); |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 256 | else |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 257 | source_image=GetFirstImageInList(source_image); |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 258 | GetMagickToken(p,&p,token); |
| 259 | } |
| 260 | if (*token == ';') |
| 261 | { |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 262 | Image |
| 263 | *canvas; |
| 264 | |
| 265 | if (channels == 1) |
cristy | e21ffdf | 2012-03-05 16:33:39 +0000 | [diff] [blame] | 266 | { |
| 267 | destination_image->colorspace=GRAYColorspace; |
| 268 | InitializePixelChannelMap(destination_image); |
| 269 | } |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 270 | canvas=CloneImage(source_image,0,0,MagickTrue,exception); |
| 271 | if (canvas == (Image *) NULL) |
| 272 | { |
| 273 | destination_image=GetLastImageInList(destination_image); |
| 274 | return((Image *) NULL); |
| 275 | } |
| 276 | AppendImageToList(&destination_image,canvas); |
| 277 | destination_image=GetLastImageInList(destination_image); |
| 278 | if (SetImageBackgroundColor(destination_image,exception) == MagickFalse) |
| 279 | { |
| 280 | destination_image=GetLastImageInList(destination_image); |
| 281 | return((Image *) NULL); |
| 282 | } |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 283 | GetMagickToken(p,&p,token); |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 284 | channels=0; |
| 285 | destination_channel=RedPixelChannel; |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 286 | } |
| 287 | i=ParsePixelChannelOption(token); |
| 288 | if (i < 0) |
| 289 | { |
| 290 | (void) ThrowMagickException(exception,GetMagickModule(),OptionError, |
| 291 | "UnableToParseExpression","`%s'",p); |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 292 | destination_image=DestroyImageList(destination_image); |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 293 | break; |
| 294 | } |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 295 | source_channel=(PixelChannel) i; |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 296 | channel_op=ExtractChannelOp; |
| 297 | GetMagickToken(p,&p,token); |
| 298 | if (*token == '<') |
| 299 | { |
| 300 | channel_op=ExchangeChannelOp; |
| 301 | GetMagickToken(p,&p,token); |
| 302 | } |
| 303 | if (*token == '=') |
| 304 | GetMagickToken(p,&p,token); |
| 305 | if (*token == '>') |
| 306 | { |
| 307 | if (channel_op != ExchangeChannelOp) |
| 308 | channel_op=TransferChannelOp; |
| 309 | GetMagickToken(p,&p,token); |
| 310 | } |
| 311 | if (channel_op != ExtractChannelOp) |
| 312 | { |
| 313 | i=ParsePixelChannelOption(token); |
| 314 | if (i < 0) |
| 315 | { |
| 316 | (void) ThrowMagickException(exception,GetMagickModule(),OptionError, |
| 317 | "UnableToParseExpression","`%s'",p); |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 318 | destination_image=DestroyImageList(destination_image); |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 319 | break; |
| 320 | } |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 321 | destination_channel=(PixelChannel) i; |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 322 | } |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 323 | status=ChannelImage(destination_image,source_image,channel_op, |
| 324 | source_channel,destination_channel,exception); |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 325 | if (status == MagickFalse) |
| 326 | { |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 327 | destination_image=DestroyImageList(destination_image); |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 328 | break; |
| 329 | } |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 330 | channels++; |
| 331 | status=SetImageProgress(source_image,ChannelOperationImageTag,p-expression, |
| 332 | strlen(expression)); |
| 333 | if (status == MagickFalse) |
| 334 | break; |
cristy | a15140f | 2012-03-04 01:21:15 +0000 | [diff] [blame] | 335 | } |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 336 | if (channels == 1) |
cristy | e21ffdf | 2012-03-05 16:33:39 +0000 | [diff] [blame] | 337 | { |
| 338 | destination_image->colorspace=GRAYColorspace; |
| 339 | InitializePixelChannelMap(destination_image); |
| 340 | } |
cristy | ab272ac | 2012-03-04 22:08:07 +0000 | [diff] [blame] | 341 | return(destination_image); |
cristy | d04e7bf | 2012-03-03 19:19:12 +0000 | [diff] [blame] | 342 | } |
cristy | 0c64372 | 2012-03-05 19:18:42 +0000 | [diff] [blame^] | 343 | |
| 344 | /* |
| 345 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 346 | % % |
| 347 | % % |
| 348 | % % |
| 349 | % C o m b i n e I m a g e s % |
| 350 | % % |
| 351 | % % |
| 352 | % % |
| 353 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 354 | % |
| 355 | % CombineImages() combines one or more images into a single image. The |
| 356 | % grayscale value of the pixels of each image in the sequence is assigned in |
| 357 | % order to the specified channels of the combined image. The typical |
| 358 | % ordering would be image 1 => Red, 2 => Green, 3 => Blue, etc. |
| 359 | % |
| 360 | % The format of the CombineImages method is: |
| 361 | % |
| 362 | % Image *CombineImages(const Image *image,ExceptionInfo *exception) |
| 363 | % |
| 364 | % A description of each parameter follows: |
| 365 | % |
| 366 | % o image: the image. |
| 367 | % |
| 368 | % o exception: return any errors or warnings in this structure. |
| 369 | % |
| 370 | */ |
| 371 | MagickExport Image *CombineImages(const Image *image,ExceptionInfo *exception) |
| 372 | { |
| 373 | #define CombineImageTag "Combine/Image" |
| 374 | |
| 375 | CacheView |
| 376 | *combine_view; |
| 377 | |
| 378 | Image |
| 379 | *combine_image; |
| 380 | |
| 381 | MagickBooleanType |
| 382 | status; |
| 383 | |
| 384 | MagickOffsetType |
| 385 | progress; |
| 386 | |
| 387 | ssize_t |
| 388 | y; |
| 389 | |
| 390 | /* |
| 391 | Ensure the image are the same size. |
| 392 | */ |
| 393 | assert(image != (const Image *) NULL); |
| 394 | assert(image->signature == MagickSignature); |
| 395 | if (image->debug != MagickFalse) |
| 396 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 397 | assert(exception != (ExceptionInfo *) NULL); |
| 398 | assert(exception->signature == MagickSignature); |
| 399 | combine_image=CloneImage(image,0,0,MagickTrue,exception); |
| 400 | if (combine_image == (Image *) NULL) |
| 401 | return((Image *) NULL); |
| 402 | if (SetImageStorageClass(combine_image,DirectClass,exception) == MagickFalse) |
| 403 | { |
| 404 | combine_image=DestroyImage(combine_image); |
| 405 | return((Image *) NULL); |
| 406 | } |
| 407 | if ((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) |
| 408 | combine_image->matte=MagickTrue; |
| 409 | /* |
| 410 | Combine images. |
| 411 | */ |
| 412 | status=MagickTrue; |
| 413 | progress=0; |
| 414 | combine_view=AcquireCacheView(combine_image); |
| 415 | for (y=0; y < (ssize_t) combine_image->rows; y++) |
| 416 | { |
| 417 | CacheView |
| 418 | *image_view; |
| 419 | |
| 420 | const Image |
| 421 | *next; |
| 422 | |
| 423 | Quantum |
| 424 | *pixels; |
| 425 | |
| 426 | register const Quantum |
| 427 | *restrict p; |
| 428 | |
| 429 | register Quantum |
| 430 | *restrict q; |
| 431 | |
| 432 | register ssize_t |
| 433 | i; |
| 434 | |
| 435 | if (status == MagickFalse) |
| 436 | continue; |
| 437 | pixels=GetCacheViewAuthenticPixels(combine_view,0,y,combine_image->columns, |
| 438 | 1,exception); |
| 439 | if (pixels == (Quantum *) NULL) |
| 440 | { |
| 441 | status=MagickFalse; |
| 442 | continue; |
| 443 | } |
| 444 | next=image; |
| 445 | for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| 446 | { |
| 447 | PixelChannel |
| 448 | channel; |
| 449 | |
| 450 | PixelTrait |
| 451 | combine_traits, |
| 452 | traits; |
| 453 | |
| 454 | register ssize_t |
| 455 | x; |
| 456 | |
| 457 | if (next == (Image *) NULL) |
| 458 | continue; |
| 459 | channel=GetPixelChannelMapChannel(image,i); |
| 460 | traits=GetPixelChannelMapTraits(image,channel); |
| 461 | combine_traits=GetPixelChannelMapTraits(combine_image,channel); |
| 462 | if ((traits == UndefinedPixelTrait) || |
| 463 | (combine_traits == UndefinedPixelTrait)) |
| 464 | continue; |
| 465 | image_view=AcquireCacheView(next); |
| 466 | p=GetCacheViewVirtualPixels(image_view,0,y,next->columns,1,exception); |
| 467 | if (p == (const Quantum *) NULL) |
| 468 | continue; |
| 469 | q=pixels; |
| 470 | for (x=0; x < (ssize_t) combine_image->columns; x++) |
| 471 | { |
| 472 | if (x < (ssize_t) image->columns) |
| 473 | { |
| 474 | q[i]=GetPixelGray(image,p); |
| 475 | p+=GetPixelChannels(image); |
| 476 | } |
| 477 | q+=GetPixelChannels(combine_image); |
| 478 | } |
| 479 | image_view=DestroyCacheView(image_view); |
| 480 | next=GetNextImageInList(next); |
| 481 | if (SyncCacheViewAuthenticPixels(combine_view,exception) == MagickFalse) |
| 482 | status=MagickFalse; |
| 483 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 484 | { |
| 485 | MagickBooleanType |
| 486 | proceed; |
| 487 | |
| 488 | proceed=SetImageProgress(image,CombineImageTag,progress++, |
| 489 | combine_image->rows); |
| 490 | if (proceed == MagickFalse) |
| 491 | status=MagickFalse; |
| 492 | } |
| 493 | } |
| 494 | } |
| 495 | combine_view=DestroyCacheView(combine_view); |
| 496 | if (status == MagickFalse) |
| 497 | combine_image=DestroyImage(combine_image); |
| 498 | return(combine_image); |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 503 | % % |
| 504 | % % |
| 505 | % % |
| 506 | % S e p a r a t e I m a g e % |
| 507 | % % |
| 508 | % % |
| 509 | % % |
| 510 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 511 | % |
| 512 | % SeparateImage() separates a channel from the image and returns it as a |
| 513 | % grayscale image. |
| 514 | % |
| 515 | % The format of the SeparateImage method is: |
| 516 | % |
| 517 | % Image *SeparateImage(const Image *image,const ChannelType channel, |
| 518 | % ExceptionInfo *exception) |
| 519 | % |
| 520 | % A description of each parameter follows: |
| 521 | % |
| 522 | % o image: the image. |
| 523 | % |
| 524 | % o channel: the image channel. |
| 525 | % |
| 526 | % o exception: return any errors or warnings in this structure. |
| 527 | % |
| 528 | */ |
| 529 | MagickExport Image *SeparateImage(const Image *image, |
| 530 | const ChannelType channel_type,ExceptionInfo *exception) |
| 531 | { |
| 532 | #define GetChannelBit(mask,bit) (((size_t) (mask) >> (size_t) (bit)) & 0x01) |
| 533 | #define SeparateImageTag "Separate/Image" |
| 534 | |
| 535 | CacheView |
| 536 | *image_view, |
| 537 | *separate_view; |
| 538 | |
| 539 | Image |
| 540 | *separate_image; |
| 541 | |
| 542 | MagickBooleanType |
| 543 | status; |
| 544 | |
| 545 | MagickOffsetType |
| 546 | progress; |
| 547 | |
| 548 | ssize_t |
| 549 | y; |
| 550 | |
| 551 | /* |
| 552 | Initialize spread image attributes. |
| 553 | */ |
| 554 | assert(image != (Image *) NULL); |
| 555 | assert(image->signature == MagickSignature); |
| 556 | if (image->debug != MagickFalse) |
| 557 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 558 | assert(exception != (ExceptionInfo *) NULL); |
| 559 | assert(exception->signature == MagickSignature); |
| 560 | separate_image=CloneImage(image,image->columns,image->rows,MagickTrue, |
| 561 | exception); |
| 562 | if (separate_image == (Image *) NULL) |
| 563 | return((Image *) NULL); |
| 564 | if (SetImageStorageClass(separate_image,DirectClass,exception) == MagickFalse) |
| 565 | { |
| 566 | separate_image=DestroyImage(separate_image); |
| 567 | return((Image *) NULL); |
| 568 | } |
| 569 | separate_image->colorspace=GRAYColorspace; |
| 570 | /* |
| 571 | Separate image. |
| 572 | */ |
| 573 | status=MagickTrue; |
| 574 | progress=0; |
| 575 | image_view=AcquireCacheView(image); |
| 576 | separate_view=AcquireCacheView(separate_image); |
| 577 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 578 | #pragma omp parallel for schedule(static) shared(progress,status) |
| 579 | #endif |
| 580 | for (y=0; y < (ssize_t) image->rows; y++) |
| 581 | { |
| 582 | register const Quantum |
| 583 | *restrict p; |
| 584 | |
| 585 | register Quantum |
| 586 | *restrict q; |
| 587 | |
| 588 | register ssize_t |
| 589 | x; |
| 590 | |
| 591 | if (status == MagickFalse) |
| 592 | continue; |
| 593 | p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception); |
| 594 | q=QueueCacheViewAuthenticPixels(separate_view,0,y,separate_image->columns,1, |
| 595 | exception); |
| 596 | if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL)) |
| 597 | { |
| 598 | status=MagickFalse; |
| 599 | continue; |
| 600 | } |
| 601 | for (x=0; x < (ssize_t) image->columns; x++) |
| 602 | { |
| 603 | register ssize_t |
| 604 | i; |
| 605 | |
| 606 | if (GetPixelMask(image,p) != 0) |
| 607 | { |
| 608 | p+=GetPixelChannels(image); |
| 609 | q+=GetPixelChannels(separate_image); |
| 610 | continue; |
| 611 | } |
| 612 | SetPixelChannel(separate_image,GrayPixelChannel,0,q); |
| 613 | for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| 614 | { |
| 615 | PixelChannel |
| 616 | channel; |
| 617 | |
| 618 | PixelTrait |
| 619 | traits; |
| 620 | |
| 621 | channel=GetPixelChannelMapChannel(image,i); |
| 622 | traits=GetPixelChannelMapTraits(image,channel); |
| 623 | if ((traits == UndefinedPixelTrait) || |
| 624 | (GetChannelBit(channel_type,channel) == 0)) |
| 625 | continue; |
| 626 | SetPixelChannel(separate_image,GrayPixelChannel,p[i],q); |
| 627 | } |
| 628 | p+=GetPixelChannels(image); |
| 629 | q+=GetPixelChannels(separate_image); |
| 630 | } |
| 631 | if (SyncCacheViewAuthenticPixels(separate_view,exception) == MagickFalse) |
| 632 | status=MagickFalse; |
| 633 | if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| 634 | { |
| 635 | MagickBooleanType |
| 636 | proceed; |
| 637 | |
| 638 | #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| 639 | #pragma omp critical (MagickCore_SeparateImage) |
| 640 | #endif |
| 641 | proceed=SetImageProgress(image,SeparateImageTag,progress++,image->rows); |
| 642 | if (proceed == MagickFalse) |
| 643 | status=MagickFalse; |
| 644 | } |
| 645 | } |
| 646 | separate_view=DestroyCacheView(separate_view); |
| 647 | image_view=DestroyCacheView(image_view); |
| 648 | return(separate_image); |
| 649 | } |
| 650 | |
| 651 | /* |
| 652 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 653 | % % |
| 654 | % % |
| 655 | % % |
| 656 | % S e p a r a t e I m a g e s % |
| 657 | % % |
| 658 | % % |
| 659 | % % |
| 660 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 661 | % |
| 662 | % SeparateImages() returns a separate grayscale image for each channel |
| 663 | % specified. |
| 664 | % |
| 665 | % The format of the SeparateImages method is: |
| 666 | % |
| 667 | % MagickBooleanType SeparateImages(const Image *image, |
| 668 | % ExceptionInfo *exception) |
| 669 | % |
| 670 | % A description of each parameter follows: |
| 671 | % |
| 672 | % o image: the image. |
| 673 | % |
| 674 | % o exception: return any errors or warnings in this structure. |
| 675 | % |
| 676 | */ |
| 677 | MagickExport Image *SeparateImages(const Image *image,ExceptionInfo *exception) |
| 678 | { |
| 679 | Image |
| 680 | *images, |
| 681 | *separate_image; |
| 682 | |
| 683 | register ssize_t |
| 684 | i; |
| 685 | |
| 686 | assert(image != (Image *) NULL); |
| 687 | assert(image->signature == MagickSignature); |
| 688 | if (image->debug != MagickFalse) |
| 689 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 690 | images=NewImageList(); |
| 691 | for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| 692 | { |
| 693 | PixelChannel |
| 694 | channel; |
| 695 | |
| 696 | PixelTrait |
| 697 | traits; |
| 698 | |
| 699 | channel=GetPixelChannelMapChannel(image,i); |
| 700 | traits=GetPixelChannelMapTraits(image,channel); |
| 701 | if ((traits == UndefinedPixelTrait) || |
| 702 | ((traits & UpdatePixelTrait) == 0)) |
| 703 | continue; |
| 704 | separate_image=SeparateImage(image,(ChannelType) (1 << channel),exception); |
| 705 | if (separate_image != (Image *) NULL) |
| 706 | AppendImageToList(&images,separate_image); |
| 707 | } |
| 708 | return(images); |
| 709 | } |