/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W W EEEEE BBBB PPPP % % W W E B B P P % % W W W EEE BBBB PPPP % % WW WW E B B P % % W W EEEEE BBBB P % % % % % % Read/Write WebP Image Format % % % % Software Design % % John Cristy % % March 2011 % % % % % % Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization % % dedicated to making software imaging solutions freely available. % % % % You may not use this file except in compliance with the License. You may % % obtain a copy of the License at % % % % http://www.imagemagick.org/script/license.php % % % % Unless required by applicable law or agreed to in writing, software % % distributed under the License is distributed on an "AS IS" BASIS, % % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % % See the License for the specific language governing permissions and % % limitations under the License. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % */ /* Include declarations. */ #include "MagickCore/studio.h" #include "MagickCore/blob.h" #include "MagickCore/blob-private.h" #include "MagickCore/client.h" #include "MagickCore/display.h" #include "MagickCore/exception.h" #include "MagickCore/exception-private.h" #include "MagickCore/image.h" #include "MagickCore/image-private.h" #include "MagickCore/list.h" #include "MagickCore/magick.h" #include "MagickCore/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/memory_.h" #include "MagickCore/option.h" #include "MagickCore/pixel-accessor.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" #include "MagickCore/module.h" #include "MagickCore/utility.h" #include "MagickCore/xwindow.h" #include "MagickCore/xwindow-private.h" #if defined(MAGICKCORE_WEBP_DELEGATE) #include #include #endif /* Forward declarations. */ #if defined(MAGICKCORE_WEBP_DELEGATE) static MagickBooleanType WriteWEBPImage(const ImageInfo *,Image *,ExceptionInfo *); #endif #if defined(MAGICKCORE_WEBP_DELEGATE) /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d W E B P I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadWEBPImage() reads an image in the WebP image format. % % The format of the ReadWEBPImage method is: % % Image *ReadWEBPImage(const ImageInfo *image_info, % ExceptionInfo *exception) % % A description of each parameter follows: % % o image_info: the image info. % % o exception: return any errors or warnings in this structure. % */ static Image *ReadWEBPImage(const ImageInfo *image_info, ExceptionInfo *exception) { int height, width; Image *image; MagickBooleanType status; register Quantum *q; register ssize_t x; register unsigned char *p; size_t length; ssize_t count, y; unsigned char *stream, *pixels; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); image=AcquireImage(image_info,exception); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } length=(size_t) GetBlobSize(image); stream=(unsigned char *) AcquireQuantumMemory(length,sizeof(*stream)); if (stream == (unsigned char *) NULL) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); count=ReadBlob(image,length,stream); if (count != (ssize_t) length) ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); pixels=(unsigned char *) WebPDecodeRGBA(stream,length,&width,&height); if (pixels == (unsigned char *) NULL) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); image->columns=(size_t) width; image->rows=(size_t) height; image->matte=MagickTrue; p=pixels; for (y=0; y < (ssize_t) image->rows; y++) { q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { SetPixelRed(image,ScaleCharToQuantum(*p++),q); SetPixelGreen(image,ScaleCharToQuantum(*p++),q); SetPixelBlue(image,ScaleCharToQuantum(*p++),q); SetPixelAlpha(image,ScaleCharToQuantum(*p++),q); q+=GetPixelChannels(image); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } free(pixels); pixels=(unsigned char *) NULL; return(image); } #endif /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r W E B P I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterWEBPImage() adds attributes for the WebP image format to % the list of supported formats. The attributes include the image format % tag, a method to read and/or write the format, whether the format % supports the saving of more than one frame to the same file or blob, % whether the format supports native in-memory I/O, and a brief % description of the format. % % The format of the RegisterWEBPImage method is: % % size_t RegisterWEBPImage(void) % */ ModuleExport size_t RegisterWEBPImage(void) { MagickInfo *entry; entry=SetMagickInfo("WEBP"); #if defined(MAGICKCORE_WEBP_DELEGATE) entry->decoder=(DecodeImageHandler *) ReadWEBPImage; entry->encoder=(EncodeImageHandler *) WriteWEBPImage; #endif entry->description=ConstantString("WebP Image Format"); entry->adjoin=MagickFalse; entry->module=ConstantString("WEBP"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r W E B P I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterWEBPImage() removes format registrations made by the WebP module % from the list of supported formats. % % The format of the UnregisterWEBPImage method is: % % UnregisterWEBPImage(void) % */ ModuleExport void UnregisterWEBPImage(void) { (void) UnregisterMagickInfo("WEBP"); } #if defined(MAGICKCORE_WEBP_DELEGATE) /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e W E B P I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteWEBPImage() writes an image in the WebP image format. % % The format of the WriteWEBPImage method is: % % MagickBooleanType WriteWEBPImage(const ImageInfo *image_info, % Image *image) % % A description of each parameter follows. % % o image_info: the image info. % % o image: The image. % */ static int WebPWriter(const unsigned char *stream,size_t length, const WebPPicture *const picture) { Image *image; image=(Image *) picture->custom_ptr; return(length != 0 ? (int) WriteBlob(image,length,stream) : 1); } static MagickBooleanType WriteWEBPImage(const ImageInfo *image_info, Image *image,ExceptionInfo *exception) { int webp_status; MagickBooleanType status; register const Quantum *restrict p; register ssize_t x; register unsigned char *restrict q; ssize_t y; unsigned char *pixels; WebPConfig configure; WebPPicture picture; WebPAuxStats statistics; /* Open output image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); assert(image != (Image *) NULL); assert(image->signature == MagickSignature); if (image->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); if ((image->columns > 16383) || (image->rows > 16383)) ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit"); status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); if (status == MagickFalse) return(status); if (WebPPictureInit(&picture) == 0) ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); picture.writer=WebPWriter; picture.custom_ptr=(void *) image; picture.stats=(&statistics); picture.width=(int) image->columns; picture.height=(int) image->rows; if (image->quality != UndefinedCompressionQuality) configure.quality=(float) image->quality; if (WebPConfigInit(&configure) == 0) ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); /* Future: set custom configuration parameters here. */ if (WebPValidateConfig(&configure) == 0) ThrowWriterException(ResourceLimitError,"UnableToEncodeImageFile"); /* Allocate memory for pixels. */ pixels=(unsigned char *) AcquireQuantumMemory(image->columns,4*image->rows* sizeof(*pixels)); if (pixels == (unsigned char *) NULL) ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); /* Convert image to WebP raster pixels. */ q=pixels; for (y=0; y < (ssize_t) image->rows; y++) { p=GetVirtualPixels(image,0,y,image->columns,1,exception); if (p == (const Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { *q++=ScaleQuantumToChar(GetPixelRed(image,p)); *q++=ScaleQuantumToChar(GetPixelGreen(image,p)); *q++=ScaleQuantumToChar(GetPixelBlue(image,p)); if (image->matte != MagickFalse) *q++=ScaleQuantumToChar(GetPixelAlpha(image,p)); p+=GetPixelChannels(image); } status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } if (image->matte == MagickFalse) webp_status=WebPPictureImportRGB(&picture,pixels,3*picture.width); else webp_status=WebPPictureImportRGBA(&picture,pixels,4*picture.width); pixels=(unsigned char *) RelinquishMagickMemory(pixels); webp_status=WebPEncode(&configure,&picture); (void) CloseBlob(image); return(webp_status == 0 ? MagickFalse : MagickTrue); } #endif