396 lines
14 KiB
C
396 lines
14 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W W EEEEE BBBB PPPP %
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% W W E B B P P %
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% W W W EEE BBBB PPPP %
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% WW WW E B B P %
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% W W EEEEE BBBB P %
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% %
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% %
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% Read/Write WebP Image Format %
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% %
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% Software Design %
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% John Cristy %
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% March 2011 %
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% %
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% %
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% Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% http://www.imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "magick/studio.h"
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#include "magick/blob.h"
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#include "magick/blob-private.h"
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#include "magick/client.h"
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#include "magick/display.h"
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#include "magick/exception.h"
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#include "magick/exception-private.h"
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#include "magick/image.h"
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#include "magick/image-private.h"
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#include "magick/list.h"
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#include "magick/magick.h"
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#include "magick/monitor.h"
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#include "magick/monitor-private.h"
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#include "magick/memory_.h"
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#include "magick/option.h"
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#include "magick/pixel-accessor.h"
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#include "magick/quantum-private.h"
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#include "magick/static.h"
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#include "magick/string_.h"
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#include "magick/module.h"
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#include "magick/utility.h"
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#include "magick/xwindow.h"
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#include "magick/xwindow-private.h"
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#if defined(MAGICKCORE_WEBP_DELEGATE)
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#include <webp/decode.h>
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#include <webp/encode.h>
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#endif
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/*
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Forward declarations.
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*/
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#if defined(MAGICKCORE_WEBP_DELEGATE)
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static MagickBooleanType
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WriteWEBPImage(const ImageInfo *,Image *);
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#endif
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#if defined(MAGICKCORE_WEBP_DELEGATE)
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e a d W E B P I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% ReadWEBPImage() reads an image in the WebP image format.
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%
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% The format of the ReadWEBPImage method is:
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%
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% Image *ReadWEBPImage(const ImageInfo *image_info,
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% ExceptionInfo *exception)
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%
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% A description of each parameter follows:
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%
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% o image_info: the image info.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static Image *ReadWEBPImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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int
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height,
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width;
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Image
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*image;
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MagickBooleanType
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status;
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register PixelPacket
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*q;
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register ssize_t
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x;
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register unsigned char
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*p;
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size_t
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length;
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ssize_t
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count,
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y;
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unsigned char
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*stream,
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*pixels;
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/*
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Open image file.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickSignature);
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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickSignature);
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image=AcquireImage(image_info);
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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if (status == MagickFalse)
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{
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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length=(size_t) GetBlobSize(image);
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stream=(unsigned char *) AcquireQuantumMemory(length,sizeof(*stream));
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if (stream == (unsigned char *) NULL)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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count=ReadBlob(image,length,stream);
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if (count != (ssize_t) length)
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ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
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pixels=(unsigned char *) WebPDecodeRGBA(stream,length,&width,&height);
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if (pixels == (unsigned char *) NULL)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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image->columns=(size_t) width;
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image->rows=(size_t) height;
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p=pixels;
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
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if (q == (PixelPacket *) NULL)
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break;
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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SetPixelRed(q,ScaleCharToQuantum(*p++));
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SetPixelGreen(q,ScaleCharToQuantum(*p++));
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SetPixelBlue(q,ScaleCharToQuantum(*p++));
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SetPixelAlpha(q,ScaleCharToQuantum(*p++));
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if (q->opacity != OpaqueOpacity)
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image->matte=MagickTrue;
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q++;
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}
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if (SyncAuthenticPixels(image,exception) == MagickFalse)
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break;
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status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
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image->rows);
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if (status == MagickFalse)
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break;
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}
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free(pixels);
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pixels=(unsigned char *) NULL;
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return(image);
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}
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#endif
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e g i s t e r W E B P I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RegisterWEBPImage() adds attributes for the WebP image format to
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% the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterWEBPImage method is:
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%
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% size_t RegisterWEBPImage(void)
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%
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*/
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ModuleExport size_t RegisterWEBPImage(void)
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{
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MagickInfo
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*entry;
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entry=SetMagickInfo("WEBP");
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#if defined(MAGICKCORE_WEBP_DELEGATE)
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entry->decoder=(DecodeImageHandler *) ReadWEBPImage;
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entry->encoder=(EncodeImageHandler *) WriteWEBPImage;
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#endif
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entry->description=ConstantString("WebP Image Format");
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entry->adjoin=MagickFalse;
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entry->module=ConstantString("WEBP");
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% U n r e g i s t e r W E B P I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% UnregisterWEBPImage() removes format registrations made by the WebP module
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% from the list of supported formats.
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%
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% The format of the UnregisterWEBPImage method is:
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%
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% UnregisterWEBPImage(void)
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%
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*/
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ModuleExport void UnregisterWEBPImage(void)
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{
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(void) UnregisterMagickInfo("WEBP");
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}
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#if defined(MAGICKCORE_WEBP_DELEGATE)
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W r i t e W E B P I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% WriteWEBPImage() writes an image in the WebP image format.
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%
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% The format of the WriteWEBPImage method is:
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%
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% MagickBooleanType WriteWEBPImage(const ImageInfo *image_info,
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% Image *image)
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%
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% A description of each parameter follows.
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%
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% o image_info: the image info.
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%
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% o image: The image.
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%
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*/
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static int WebPWriter(const unsigned char *stream,size_t length,
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const WebPPicture *const picture)
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{
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Image
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*image;
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image=(Image *) picture->custom_ptr;
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return(length != 0 ? (int) WriteBlob(image,length,stream) : 1);
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}
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static MagickBooleanType WriteWEBPImage(const ImageInfo *image_info,
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Image *image)
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{
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int
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webp_status;
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MagickBooleanType
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status;
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register const PixelPacket
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*restrict p;
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register ssize_t
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x;
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register unsigned char
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*restrict q;
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ssize_t
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y;
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unsigned char
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*pixels;
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WebPConfig
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configure;
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WebPPicture
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picture;
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WebPAuxStats
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statistics;
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/*
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Open output image file.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickSignature);
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assert(image != (Image *) NULL);
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assert(image->signature == MagickSignature);
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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if ((image->columns > 16383) || (image->rows > 16383))
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ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
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status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
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if (status == MagickFalse)
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return(status);
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if (WebPPictureInit(&picture) == 0)
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ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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picture.writer=WebPWriter;
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picture.custom_ptr=(void *) image;
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picture.stats=(&statistics);
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picture.width=(int) image->columns;
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picture.height=(int) image->rows;
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if (WebPConfigInit(&configure) == 0)
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ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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if (image->quality != UndefinedCompressionQuality)
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configure.quality=(float) image->quality;
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if (WebPValidateConfig(&configure) == 0)
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ThrowWriterException(ResourceLimitError,"UnableToEncodeImageFile");
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/*
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Allocate memory for pixels.
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*/
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pixels=(unsigned char *) AcquireQuantumMemory(image->columns,
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(image->matte != MagickFalse ? 4 : 3)*image->rows*sizeof(*pixels));
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if (pixels == (unsigned char *) NULL)
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ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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/*
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Convert image to WebP raster pixels.
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*/
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q=pixels;
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
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if (p == (PixelPacket *) NULL)
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break;
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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*q++=ScaleQuantumToChar(GetPixelRed(p));
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*q++=ScaleQuantumToChar(GetPixelGreen(p));
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*q++=ScaleQuantumToChar(GetPixelBlue(p));
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if (image->matte != MagickFalse)
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*q++=ScaleQuantumToChar(GetPixelAlpha(p));
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p++;
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}
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status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
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image->rows);
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if (status == MagickFalse)
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break;
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}
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if (image->matte == MagickFalse)
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webp_status=WebPPictureImportRGB(&picture,pixels,3*picture.width);
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else
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webp_status=WebPPictureImportRGBA(&picture,pixels,4*picture.width);
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pixels=(unsigned char *) RelinquishMagickMemory(pixels);
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webp_status=WebPEncode(&configure,&picture);
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WebPPictureFree(&picture);
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(void) CloseBlob(image);
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return(webp_status == 0 ? MagickFalse : MagickTrue);
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}
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#endif
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