granicus.if.org Git - imagemagick/blob - coders/webp.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                         W   W  EEEEE  BBBB   PPPP                           %
   7 %                         W   W  E      B   B  P   P                          %
   8 %                         W W W  EEE    BBBB   PPPP                           %
   9 %                         WW WW  E      B   B  P                              %
  10 %                         W   W  EEEEE  BBBB   P                              %
  11 %                                                                             %
  12 %                                                                             %
  13 %                         Read/Write WebP Image Format                        %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 March 2011                                  %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2014 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "MagickCore/studio.h"
  43 #include "MagickCore/artifact.h"
  44 #include "MagickCore/blob.h"
  45 #include "MagickCore/blob-private.h"
  46 #include "MagickCore/client.h"
  47 #include "MagickCore/colorspace-private.h"
  48 #include "MagickCore/display.h"
  49 #include "MagickCore/exception.h"
  50 #include "MagickCore/exception-private.h"
  51 #include "MagickCore/image.h"
  52 #include "MagickCore/image-private.h"
  53 #include "MagickCore/list.h"
  54 #include "MagickCore/magick.h"
  55 #include "MagickCore/monitor.h"
  56 #include "MagickCore/monitor-private.h"
  57 #include "MagickCore/memory_.h"
  58 #include "MagickCore/option.h"
  59 #include "MagickCore/pixel-accessor.h"
  60 #include "MagickCore/quantum-private.h"
  61 #include "MagickCore/static.h"
  62 #include "MagickCore/string_.h"
  63 #include "MagickCore/string-private.h"
  64 #include "MagickCore/module.h"
  65 #include "MagickCore/utility.h"
  66 #include "MagickCore/xwindow.h"
  67 #include "MagickCore/xwindow-private.h"
  68 #if defined(MAGICKCORE_WEBP_DELEGATE)
  69 #include <webp/decode.h>
  70 #include <webp/encode.h>
  71 #endif
  72 \f
  73 /*
  74   Forward declarations.
  75 */
  76 #if defined(MAGICKCORE_WEBP_DELEGATE)
  77 static MagickBooleanType
  78   WriteWEBPImage(const ImageInfo *,Image *,ExceptionInfo *);
  79 #endif
  80 \f
  81 /*
  82 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  83 %                                                                             %
  84 %                                                                             %
  85 %                                                                             %
  86 %   I s W E B P                                                               %
  87 %                                                                             %
  88 %                                                                             %
  89 %                                                                             %
  90 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  91 %
  92 %  IsWEBP() returns MagickTrue if the image format type, identified by the
  93 %  magick string, is WebP.
  94 %
  95 %  The format of the IsWEBP method is:
  96 %
  97 %      MagickBooleanType IsWEBP(const unsigned char *magick,const size_t length)
  98 %
  99 %  A description of each parameter follows:
 100 %
 101 %    o magick: compare image format pattern against these bytes.
 102 %
 103 %    o length: Specifies the length of the magick string.
 104 %
 105 */
 106 static MagickBooleanType IsWEBP(const unsigned char *magick,const size_t length)
 107 {
 108   if (length < 12)
 109     return(MagickFalse);
 110   if (LocaleNCompare((const char *) magick+8,"WEBP",4) == 0)
 111     return(MagickTrue);
 112   return(MagickFalse);
 113 }
 114 \f
 115 #if defined(MAGICKCORE_WEBP_DELEGATE)
 116 /*
 117 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 118 %                                                                             %
 119 %                                                                             %
 120 %                                                                             %
 121 %   R e a d W E B P I m a g e                                                 %
 122 %                                                                             %
 123 %                                                                             %
 124 %                                                                             %
 125 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 126 %
 127 %  ReadWEBPImage() reads an image in the WebP image format.
 128 %
 129 %  The format of the ReadWEBPImage method is:
 130 %
 131 %      Image *ReadWEBPImage(const ImageInfo *image_info,
 132 %        ExceptionInfo *exception)
 133 %
 134 %  A description of each parameter follows:
 135 %
 136 %    o image_info: the image info.
 137 %
 138 %    o exception: return any errors or warnings in this structure.
 139 %
 140 */
 141
 142 static inline uint32_t ReadWebPLSBWord(const unsigned char *restrict data)
 143 {
 144   register const unsigned char
 145     *p;
 146
 147   register uint32_t
 148     value;
 149
 150   p=data;
 151   value=(uint32_t) (*p++);
 152   value|=((uint32_t) (*p++)) << 8;
 153   value|=((uint32_t) (*p++)) << 16;
 154   value|=((uint32_t) (*p++)) << 24;
 155   return(value);
 156 }
 157
 158 static MagickBooleanType IsWEBPImageLossless(const unsigned char *stream,
 159   const size_t length)
 160 {
 161 #define VP8_CHUNK_INDEX  15
 162 #define LOSSLESS_FLAG  'L'
 163 #define EXTENDED_HEADER  'X'
 164 #define VP8_CHUNK_HEADER  "VP8"
 165 #define VP8_CHUNK_HEADER_SIZE  3
 166 #define RIFF_HEADER_SIZE  12
 167 #define VP8X_CHUNK_SIZE  10
 168 #define TAG_SIZE  4
 169 #define CHUNK_SIZE_BYTES  4
 170 #define CHUNK_HEADER_SIZE  8
 171 #define MAX_CHUNK_PAYLOAD  (~0UL-CHUNK_HEADER_SIZE-1)
 172
 173   ssize_t
 174     offset;
 175
 176   /*
 177     Read simple header.
 178   */
 179   if (stream[VP8_CHUNK_INDEX] != EXTENDED_HEADER)
 180    return(stream[VP8_CHUNK_INDEX] == LOSSLESS_FLAG ? MagickTrue : MagickFalse);
 181   /*
 182     Read extended header.
 183   */
 184   offset=RIFF_HEADER_SIZE+TAG_SIZE+CHUNK_SIZE_BYTES+VP8X_CHUNK_SIZE;
 185   while (offset <= (ssize_t) length)
 186   {
 187     uint32_t
 188       chunk_size,
 189       chunk_size_pad;
 190
 191     chunk_size=ReadWebPLSBWord(stream+offset+TAG_SIZE);
 192     if (chunk_size > MAX_CHUNK_PAYLOAD)
 193       break;
 194     chunk_size_pad=(CHUNK_HEADER_SIZE+chunk_size+1) & ~1;
 195     if (memcmp(stream+offset,VP8_CHUNK_HEADER,VP8_CHUNK_HEADER_SIZE) == 0)
 196       return(*(stream+offset+VP8_CHUNK_HEADER_SIZE) == LOSSLESS_FLAG ?
 197         MagickTrue : MagickFalse);
 198     offset+=chunk_size_pad;
 199   }
 200   return(MagickFalse);
 201 }
 202
 203 static Image *ReadWEBPImage(const ImageInfo *image_info,
 204   ExceptionInfo *exception)
 205 {
 206   Image
 207     *image;
 208
 209   MagickBooleanType
 210     status;
 211
 212   register unsigned char
 213     *p;
 214
 215   size_t
 216     length;
 217
 218   ssize_t
 219     count,
 220     y;
 221
 222   unsigned char
 223     *stream;
 224
 225   WebPDecoderConfig
 226     configure;
 227
 228   WebPDecBuffer
 229     *restrict webp_image = &configure.output;
 230
 231   WebPBitstreamFeatures
 232     *restrict features = &configure.input;
 233
 234   /*
 235     Open image file.
 236   */
 237   assert(image_info != (const ImageInfo *) NULL);
 238   assert(image_info->signature == MagickSignature);
 239   if (image_info->debug != MagickFalse)
 240     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 241       image_info->filename);
 242   assert(exception != (ExceptionInfo *) NULL);
 243   assert(exception->signature == MagickSignature);
 244   image=AcquireImage(image_info,exception);
 245   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 246   if (status == MagickFalse)
 247     {
 248       image=DestroyImageList(image);
 249       return((Image *) NULL);
 250     }
 251   if (WebPInitDecoderConfig(&configure) == 0)
 252     ThrowReaderException(ResourceLimitError,"UnableToDecodeImageFile");
 253   length=(size_t) GetBlobSize(image);
 254   stream=(unsigned char *) AcquireQuantumMemory(length,sizeof(*stream));
 255   if (stream == (unsigned char *) NULL)
 256     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 257   count=ReadBlob(image,length,stream);
 258   if (count != (ssize_t) length)
 259     ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
 260   if (WebPGetFeatures(stream,length,features) != 0)
 261     {
 262       stream=(unsigned char*) RelinquishMagickMemory(stream);
 263       ThrowReaderException(ResourceLimitError,"UnableToDecodeImageFile");
 264     }
 265   webp_image->colorspace=MODE_RGBA;
 266   if (WebPDecode(stream,length,&configure) != 0)
 267     {
 268       stream=(unsigned char*) RelinquishMagickMemory(stream);
 269       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 270     }
 271   image->columns=(size_t) webp_image->width;
 272   image->rows=(size_t) webp_image->height;
 273   image->alpha_trait=features->has_alpha != 0 ? BlendPixelTrait :
 274     UndefinedPixelTrait;
 275   if (IsWEBPImageLossless(stream,length) != MagickFalse)
 276     image->quality=100;
 277   p=webp_image->u.RGBA.rgba;
 278   for (y=0; y < (ssize_t) image->rows; y++)
 279   {
 280     register Quantum
 281       *q;
 282
 283     register ssize_t
 284       x;
 285
 286     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 287     if (q == (Quantum *) NULL)
 288       break;
 289     for (x=0; x < (ssize_t) image->columns; x++)
 290     {
 291       SetPixelRed(image,ScaleCharToQuantum(*p++),q);
 292       SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
 293       SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
 294       SetPixelAlpha(image,ScaleCharToQuantum(*p++),q);
 295       q+=GetPixelChannels(image);
 296     }
 297     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 298       break;
 299     status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 300       image->rows);
 301     if (status == MagickFalse)
 302       break;
 303   }
 304   WebPFreeDecBuffer(webp_image);
 305   stream=(unsigned char*) RelinquishMagickMemory(stream);
 306   return(image);
 307 }
 308 #endif
 309 \f
 310 /*
 311 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 312 %                                                                             %
 313 %                                                                             %
 314 %                                                                             %
 315 %   R e g i s t e r W E B P I m a g e                                         %
 316 %                                                                             %
 317 %                                                                             %
 318 %                                                                             %
 319 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 320 %
 321 %  RegisterWEBPImage() adds attributes for the WebP image format to
 322 %  the list of supported formats.  The attributes include the image format
 323 %  tag, a method to read and/or write the format, whether the format
 324 %  supports the saving of more than one frame to the same file or blob,
 325 %  whether the format supports native in-memory I/O, and a brief
 326 %  description of the format.
 327 %
 328 %  The format of the RegisterWEBPImage method is:
 329 %
 330 %      size_t RegisterWEBPImage(void)
 331 %
 332 */
 333 ModuleExport size_t RegisterWEBPImage(void)
 334 {
 335   char
 336     version[MaxTextExtent];
 337
 338   MagickInfo
 339     *entry;
 340
 341   *version='\0';
 342   entry=SetMagickInfo("WEBP");
 343 #if defined(MAGICKCORE_WEBP_DELEGATE)
 344   entry->decoder=(DecodeImageHandler *) ReadWEBPImage;
 345   entry->encoder=(EncodeImageHandler *) WriteWEBPImage;
 346   (void) FormatLocaleString(version,MaxTextExtent,"libwebp %d.%d.%d",
 347     (WebPGetDecoderVersion() >> 16) & 0xff,
 348     (WebPGetDecoderVersion() >> 8) & 0xff,
 349     (WebPGetDecoderVersion() >> 0) & 0xff);
 350 #endif
 351   entry->description=ConstantString("WebP Image Format");
 352   entry->adjoin=MagickFalse;
 353   entry->module=ConstantString("WEBP");
 354   entry->magick=(IsImageFormatHandler *) IsWEBP;
 355   if (*version != '\0')
 356     entry->version=ConstantString(version);
 357   (void) RegisterMagickInfo(entry);
 358   return(MagickImageCoderSignature);
 359 }
 360 \f
 361 /*
 362 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 363 %                                                                             %
 364 %                                                                             %
 365 %                                                                             %
 366 %   U n r e g i s t e r W E B P I m a g e                                     %
 367 %                                                                             %
 368 %                                                                             %
 369 %                                                                             %
 370 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 371 %
 372 %  UnregisterWEBPImage() removes format registrations made by the WebP module
 373 %  from the list of supported formats.
 374 %
 375 %  The format of the UnregisterWEBPImage method is:
 376 %
 377 %      UnregisterWEBPImage(void)
 378 %
 379 */
 380 ModuleExport void UnregisterWEBPImage(void)
 381 {
 382   (void) UnregisterMagickInfo("WEBP");
 383 }
 384 #if defined(MAGICKCORE_WEBP_DELEGATE)
 385 \f
 386 /*
 387 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 388 %                                                                             %
 389 %                                                                             %
 390 %                                                                             %
 391 %   W r i t e W E B P I m a g e                                               %
 392 %                                                                             %
 393 %                                                                             %
 394 %                                                                             %
 395 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 396 %
 397 %  WriteWEBPImage() writes an image in the WebP image format.
 398 %
 399 %  The format of the WriteWEBPImage method is:
 400 %
 401 %      MagickBooleanType WriteWEBPImage(const ImageInfo *image_info,
 402 %        Image *image)
 403 %
 404 %  A description of each parameter follows.
 405 %
 406 %    o image_info: the image info.
 407 %
 408 %    o image:  The image.
 409 %
 410 */
 411
 412 static int WebPWriter(const unsigned char *stream,size_t length,
 413   const WebPPicture *const picture)
 414 {
 415   Image
 416     *image;
 417
 418   image=(Image *) picture->custom_ptr;
 419   return(length != 0 ? (int) WriteBlob(image,length,stream) : 1);
 420 }
 421
 422 static MagickBooleanType WriteWEBPImage(const ImageInfo *image_info,
 423   Image *image,ExceptionInfo *exception)
 424 {
 425   const char
 426     *value;
 427
 428   int
 429     webp_status;
 430
 431   MagickBooleanType
 432     status;
 433
 434   MemoryInfo
 435     *pixel_info;
 436
 437   register uint32_t
 438     *restrict q;
 439
 440   ssize_t
 441     y;
 442
 443   WebPConfig
 444     configure;
 445
 446   WebPPicture
 447     picture;
 448
 449   WebPAuxStats
 450     statistics;
 451
 452   /*
 453     Open output image file.
 454   */
 455   assert(image_info != (const ImageInfo *) NULL);
 456   assert(image_info->signature == MagickSignature);
 457   assert(image != (Image *) NULL);
 458   assert(image->signature == MagickSignature);
 459   if (image->debug != MagickFalse)
 460     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 461   if ((image->columns > 16383UL) || (image->rows > 16383UL))
 462     ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
 463   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 464   if (status == MagickFalse)
 465     return(status);
 466   if ((WebPPictureInit(&picture) == 0) || (WebPConfigInit(&configure) == 0))
 467     ThrowWriterException(ResourceLimitError,"UnableToEncodeImageFile");
 468   picture.writer=WebPWriter;
 469   picture.custom_ptr=(void *) image;
 470   picture.stats=(&statistics);
 471   picture.width=(int) image->columns;
 472   picture.height=(int) image->rows;
 473   picture.argb_stride=(int) image->columns;
 474   picture.use_argb=1;
 475   if (image->quality != UndefinedCompressionQuality)
 476     configure.quality=(float) image->quality;
 477   else
 478     if (image->quality >= 100)
 479       configure.lossless=1;
 480   value=GetImageOption(image_info,"webp:lossless");
 481   if (value != (char *) NULL)
 482     configure.lossless=ParseCommandOption(MagickBooleanOptions,MagickFalse,
 483       value);
 484   value=GetImageOption(image_info,"webp:method");
 485   if (value != (char *) NULL)
 486     configure.method=StringToInteger(value);
 487   value=GetImageOption(image_info,"webp:image-hint");
 488   if (value != (char *) NULL)
 489     {
 490       if (LocaleCompare(value,"graph") == 0)
 491         configure.image_hint=WEBP_HINT_GRAPH;
 492       if (LocaleCompare(value,"photo") == 0)
 493         configure.image_hint=WEBP_HINT_PHOTO;
 494       if (LocaleCompare(value,"picture") == 0)
 495         configure.image_hint=WEBP_HINT_PICTURE;
 496     }
 497   value=GetImageOption(image_info,"webp:target-size");
 498   if (value != (char *) NULL)
 499     configure.target_size=StringToInteger(value);
 500   value=GetImageOption(image_info,"webp:target-psnr");
 501   if (value != (char *) NULL)
 502     configure.target_PSNR=(float) StringToDouble(value,(char **) NULL);
 503   value=GetImageOption(image_info,"webp:segments");
 504   if (value != (char *) NULL)
 505     configure.segments=StringToInteger(value);
 506   value=GetImageOption(image_info,"webp:sns-strength");
 507   if (value != (char *) NULL)
 508     configure.sns_strength=StringToInteger(value);
 509   value=GetImageOption(image_info,"webp:filter-strength");
 510   if (value != (char *) NULL)
 511     configure.filter_strength=StringToInteger(value);
 512   value=GetImageOption(image_info,"webp:filter-sharpness");
 513   if (value != (char *) NULL)
 514     configure.filter_sharpness=StringToInteger(value);
 515   value=GetImageOption(image_info,"webp:filter-type");
 516   if (value != (char *) NULL)
 517     configure.filter_type=StringToInteger(value);
 518   value=GetImageOption(image_info,"webp:auto-filter");
 519   if (value != (char *) NULL)
 520     configure.autofilter=ParseCommandOption(MagickBooleanOptions,MagickFalse,
 521       value);
 522   value=GetImageOption(image_info,"webp:alpha-compression");
 523   if (value != (char *) NULL)
 524     configure.alpha_compression=StringToInteger(value);
 525   value=GetImageOption(image_info,"webp:alpha-filtering");
 526   if (value != (char *) NULL)
 527     configure.alpha_filtering=StringToInteger(value);
 528   value=GetImageOption(image_info,"webp:alpha-quality");
 529   if (value != (char *) NULL)
 530     configure.alpha_quality=StringToInteger(value);
 531   value=GetImageOption(image_info,"webp:pass");
 532   if (value != (char *) NULL)
 533     configure.pass=StringToInteger(value);
 534   value=GetImageOption(image_info,"webp:show-compressed");
 535   if (value != (char *) NULL)
 536     configure.show_compressed=StringToInteger(value);
 537   value=GetImageOption(image_info,"webp:preprocessing");
 538   if (value != (char *) NULL)
 539     configure.preprocessing=StringToInteger(value);
 540   value=GetImageOption(image_info,"webp:partitions");
 541   if (value != (char *) NULL)
 542     configure.partitions=StringToInteger(value);
 543   value=GetImageOption(image_info,"webp:partition-limit");
 544   if (value != (char *) NULL)
 545     configure.partition_limit=StringToInteger(value);
 546   if (WebPValidateConfig(&configure) == 0)
 547     ThrowWriterException(ResourceLimitError,"UnableToEncodeImageFile");
 548   /*
 549     Allocate memory for pixels.
 550   */
 551   if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
 552     (void) TransformImageColorspace(image,sRGBColorspace,exception);
 553   pixel_info=AcquireVirtualMemory(image->columns,image->rows*
 554     sizeof(*picture.argb));
 555   if (pixel_info == (MemoryInfo *) NULL)
 556     ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 557   picture.argb=(uint32_t *) GetVirtualMemoryBlob(pixel_info);
 558   /*
 559     Convert image to WebP raster pixels.
 560   */
 561   q=picture.argb;
 562   for (y=0; y < (ssize_t) image->rows; y++)
 563   {
 564     register const Quantum
 565       *restrict p;
 566
 567     register ssize_t
 568       x;
 569
 570     p=GetVirtualPixels(image,0,y,image->columns,1,exception);
 571     if (p == (const Quantum *) NULL)
 572       break;
 573     for (x=0; x < (ssize_t) image->columns; x++)
 574     {
 575       *q++=(uint32_t) (image->alpha_trait == BlendPixelTrait ?
 576         ScaleQuantumToChar(GetPixelAlpha(image,p)) << 24 : 0xff000000) |
 577         (ScaleQuantumToChar(GetPixelRed(image,p)) << 16) |
 578         (ScaleQuantumToChar(GetPixelGreen(image,p)) << 8) |
 579         (ScaleQuantumToChar(GetPixelBlue(image,p)));
 580       p+=GetPixelChannels(image);
 581     }
 582     status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 583       image->rows);
 584     if (status == MagickFalse)
 585       break;
 586   }
 587   webp_status=WebPEncode(&configure,&picture);
 588   WebPPictureFree(&picture);
 589   pixel_info=RelinquishVirtualMemory(pixel_info);
 590   (void) CloseBlob(image);
 591   return(webp_status == 0 ? MagickFalse : MagickTrue);
 592 }
 593 #endif