| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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 1999-2011 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 <webp/decode.h> |
| #include <webp/encode.h> |
| #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); |
| 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; |
| 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); |
| if (GetPixelAlpha(image,q) != OpaqueAlpha) |
| image->matte=MagickTrue; |
| 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); |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->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, |
| (image->matte != MagickFalse ? 4 : 3)*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,&image->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((Quantum) (image->matte != MagickFalse ? |
| GetPixelAlpha(image,p) : OpaqueAlpha)); |
| 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 |