| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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 1999-2013 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/artifact.h" |
| #include "MagickCore/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/client.h" |
| #include "MagickCore/colorspace-private.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/string-private.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 |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % I s W E B P % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % IsWEBP() returns MagickTrue if the image format type, identified by the |
| % magick string, is WebP. |
| % |
| % The format of the IsWEBP method is: |
| % |
| % MagickBooleanType IsWEBP(const unsigned char *magick,const size_t length) |
| % |
| % A description of each parameter follows: |
| % |
| % o magick: compare image format pattern against these bytes. |
| % |
| % o length: Specifies the length of the magick string. |
| % |
| */ |
| static MagickBooleanType IsWEBP(const unsigned char *magick,const size_t length) |
| { |
| if (length < 12) |
| return(MagickFalse); |
| if (LocaleNCompare((const char *) magick+8,"WEBP",4) == 0) |
| return(MagickTrue); |
| return(MagickFalse); |
| } |
| |
| #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 inline uint32_t ReadWebPLSBWord( |
| const unsigned char *magick_restrict data) |
| { |
| register const unsigned char |
| *p; |
| |
| register uint32_t |
| value; |
| |
| p=data; |
| value=(uint32_t) (*p++); |
| value|=((uint32_t) (*p++)) << 8; |
| value|=((uint32_t) (*p++)) << 16; |
| value|=((uint32_t) (*p++)) << 24; |
| return(value); |
| } |
| |
| static MagickBooleanType IsWEBPImageLossless(const unsigned char *stream, |
| const size_t length) |
| { |
| #define VP8_CHUNK_INDEX 15 |
| #define LOSSLESS_FLAG 'L' |
| #define EXTENDED_HEADER 'X' |
| #define VP8_CHUNK_HEADER "VP8" |
| #define VP8_CHUNK_HEADER_SIZE 3 |
| #define RIFF_HEADER_SIZE 12 |
| #define VP8X_CHUNK_SIZE 10 |
| #define TAG_SIZE 4 |
| #define CHUNK_SIZE_BYTES 4 |
| #define CHUNK_HEADER_SIZE 8 |
| #define MAX_CHUNK_PAYLOAD (~0U-CHUNK_HEADER_SIZE-1) |
| |
| ssize_t |
| offset; |
| |
| /* |
| Read simple header. |
| */ |
| if (stream[VP8_CHUNK_INDEX] != EXTENDED_HEADER) |
| return(stream[VP8_CHUNK_INDEX] == LOSSLESS_FLAG ? MagickTrue : MagickFalse); |
| /* |
| Read extended header. |
| */ |
| offset=RIFF_HEADER_SIZE+TAG_SIZE+CHUNK_SIZE_BYTES+VP8X_CHUNK_SIZE; |
| while (offset <= (ssize_t) length) |
| { |
| uint32_t |
| chunk_size, |
| chunk_size_pad; |
| |
| chunk_size=ReadWebPLSBWord(stream+offset+TAG_SIZE); |
| if (chunk_size > MAX_CHUNK_PAYLOAD) |
| break; |
| chunk_size_pad=(CHUNK_HEADER_SIZE+chunk_size+1) & ~1; |
| if (memcmp(stream+offset,VP8_CHUNK_HEADER,VP8_CHUNK_HEADER_SIZE) == 0) |
| return(*(stream+offset+VP8_CHUNK_HEADER_SIZE) == LOSSLESS_FLAG ? |
| MagickTrue : MagickFalse); |
| offset+=chunk_size_pad; |
| } |
| return(MagickFalse); |
| } |
| |
| static Image *ReadWEBPImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| Image |
| *image; |
| |
| int |
| webp_status; |
| |
| MagickBooleanType |
| status; |
| |
| register unsigned char |
| *p; |
| |
| size_t |
| length; |
| |
| ssize_t |
| count, |
| y; |
| |
| unsigned char |
| header[12], |
| *stream; |
| |
| WebPDecoderConfig |
| configure; |
| |
| WebPDecBuffer |
| *magick_restrict webp_image = &configure.output; |
| |
| WebPBitstreamFeatures |
| *magick_restrict features = &configure.input; |
| |
| /* |
| Open image file. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickCoreSignature); |
| if (image_info->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", |
| image_info->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| image=AcquireImage(image_info,exception); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| if (WebPInitDecoderConfig(&configure) == 0) |
| ThrowReaderException(ResourceLimitError,"UnableToDecodeImageFile"); |
| webp_image->colorspace=MODE_RGBA; |
| count=ReadBlob(image,12,header); |
| if (count != 12) |
| ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); |
| status=IsWEBP(header,count); |
| if (status == MagickFalse) |
| ThrowReaderException(CorruptImageError,"CorruptImage"); |
| length=(size_t) (ReadWebPLSBWord(header+4)+8); |
| if (length < 12) |
| ThrowReaderException(CorruptImageError,"CorruptImage"); |
| stream=(unsigned char *) AcquireQuantumMemory(length,sizeof(*stream)); |
| if (stream == (unsigned char *) NULL) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| memcpy(stream,header,12); |
| count=ReadBlob(image,length-12,stream+12); |
| if (count != (ssize_t) (length-12)) |
| ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); |
| webp_status=WebPGetFeatures(stream,length,features); |
| if (webp_status == VP8_STATUS_OK) |
| { |
| image->columns=(size_t) features->width; |
| image->rows=(size_t) features->height; |
| image->depth=8; |
| image->alpha_trait=features->has_alpha != 0 ? BlendPixelTrait : |
| UndefinedPixelTrait; |
| if (image_info->ping != MagickFalse) |
| { |
| stream=(unsigned char*) RelinquishMagickMemory(stream); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| status=SetImageExtent(image,image->columns,image->rows,exception); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| webp_status=WebPDecode(stream,length,&configure); |
| } |
| if (webp_status != VP8_STATUS_OK) |
| { |
| stream=(unsigned char*) RelinquishMagickMemory(stream); |
| switch (webp_status) |
| { |
| case VP8_STATUS_OUT_OF_MEMORY: |
| { |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| break; |
| } |
| case VP8_STATUS_INVALID_PARAM: |
| { |
| ThrowReaderException(CorruptImageError,"invalid parameter"); |
| break; |
| } |
| case VP8_STATUS_BITSTREAM_ERROR: |
| { |
| ThrowReaderException(CorruptImageError,"CorruptImage"); |
| break; |
| } |
| case VP8_STATUS_UNSUPPORTED_FEATURE: |
| { |
| ThrowReaderException(CoderError,"DataEncodingSchemeIsNotSupported"); |
| break; |
| } |
| case VP8_STATUS_SUSPENDED: |
| { |
| ThrowReaderException(CorruptImageError,"decoder suspended"); |
| break; |
| } |
| case VP8_STATUS_USER_ABORT: |
| { |
| ThrowReaderException(CorruptImageError,"user abort"); |
| break; |
| } |
| case VP8_STATUS_NOT_ENOUGH_DATA: |
| { |
| ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); |
| break; |
| } |
| default: |
| ThrowReaderException(CorruptImageError,"CorruptImage"); |
| } |
| } |
| if (IsWEBPImageLossless(stream,length) != MagickFalse) |
| image->quality=100; |
| p=(unsigned char *) webp_image->u.RGBA.rgba; |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register Quantum |
| *q; |
| |
| register ssize_t |
| x; |
| |
| 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; |
| } |
| WebPFreeDecBuffer(webp_image); |
| stream=(unsigned char*) RelinquishMagickMemory(stream); |
| 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) |
| { |
| char |
| version[MagickPathExtent]; |
| |
| MagickInfo |
| *entry; |
| |
| *version='\0'; |
| entry=AcquireMagickInfo("WEBP","WEBP","WebP Image Format"); |
| #if defined(MAGICKCORE_WEBP_DELEGATE) |
| entry->decoder=(DecodeImageHandler *) ReadWEBPImage; |
| entry->encoder=(EncodeImageHandler *) WriteWEBPImage; |
| (void) FormatLocaleString(version,MagickPathExtent,"libwebp %d.%d.%d [%04X]", |
| (WebPGetDecoderVersion() >> 16) & 0xff, |
| (WebPGetDecoderVersion() >> 8) & 0xff, |
| (WebPGetDecoderVersion() >> 0) & 0xff,WEBP_DECODER_ABI_VERSION); |
| #endif |
| entry->mime_type=ConstantString("image/webp"); |
| entry->flags^=CoderAdjoinFlag; |
| entry->magick=(IsImageFormatHandler *) IsWEBP; |
| if (*version != '\0') |
| entry->version=ConstantString(version); |
| (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. |
| % |
| */ |
| |
| #if WEBP_DECODER_ABI_VERSION >= 0x0100 |
| static int WebPEncodeProgress(int percent,const WebPPicture* picture) |
| { |
| #define EncodeImageTag "Encode/Image" |
| |
| Image |
| *image; |
| |
| MagickBooleanType |
| status; |
| |
| image=(Image *) picture->custom_ptr; |
| status=SetImageProgress(image,EncodeImageTag,percent-1,100); |
| return(status == MagickFalse ? 0 : 1); |
| } |
| #endif |
| |
| static int WebPEncodeWriter(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) |
| { |
| const char |
| *value; |
| |
| int |
| webp_status; |
| |
| MagickBooleanType |
| status; |
| |
| MemoryInfo |
| *pixel_info; |
| |
| register uint32_t |
| *magick_restrict q; |
| |
| ssize_t |
| y; |
| |
| WebPConfig |
| configure; |
| |
| WebPPicture |
| picture; |
| |
| WebPAuxStats |
| statistics; |
| |
| /* |
| Open output image file. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickCoreSignature); |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| if ((image->columns > 16383UL) || (image->rows > 16383UL)) |
| ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit"); |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| return(status); |
| if ((WebPPictureInit(&picture) == 0) || (WebPConfigInit(&configure) == 0)) |
| ThrowWriterException(ResourceLimitError,"UnableToEncodeImageFile"); |
| picture.writer=WebPEncodeWriter; |
| picture.custom_ptr=(void *) image; |
| #if WEBP_DECODER_ABI_VERSION >= 0x0100 |
| picture.progress_hook=WebPEncodeProgress; |
| #endif |
| picture.stats=(&statistics); |
| picture.width=(int) image->columns; |
| picture.height=(int) image->rows; |
| picture.argb_stride=(int) image->columns; |
| picture.use_argb=1; |
| if (image->quality != UndefinedCompressionQuality) |
| configure.quality=(float) image->quality; |
| if (image->quality >= 100) |
| configure.lossless=1; |
| value=GetImageOption(image_info,"webp:lossless"); |
| if (value != (char *) NULL) |
| configure.lossless=(int) ParseCommandOption(MagickBooleanOptions, |
| MagickFalse,value); |
| value=GetImageOption(image_info,"webp:method"); |
| if (value != (char *) NULL) |
| configure.method=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:image-hint"); |
| if (value != (char *) NULL) |
| { |
| if (LocaleCompare(value,"default") == 0) |
| configure.image_hint=WEBP_HINT_DEFAULT; |
| if (LocaleCompare(value,"photo") == 0) |
| configure.image_hint=WEBP_HINT_PHOTO; |
| if (LocaleCompare(value,"picture") == 0) |
| configure.image_hint=WEBP_HINT_PICTURE; |
| #if WEBP_DECODER_ABI_VERSION >= 0x0200 |
| if (LocaleCompare(value,"graph") == 0) |
| configure.image_hint=WEBP_HINT_GRAPH; |
| #endif |
| } |
| value=GetImageOption(image_info,"webp:target-size"); |
| if (value != (char *) NULL) |
| configure.target_size=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:target-psnr"); |
| if (value != (char *) NULL) |
| configure.target_PSNR=(float) StringToDouble(value,(char **) NULL); |
| value=GetImageOption(image_info,"webp:segments"); |
| if (value != (char *) NULL) |
| configure.segments=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:sns-strength"); |
| if (value != (char *) NULL) |
| configure.sns_strength=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:filter-strength"); |
| if (value != (char *) NULL) |
| configure.filter_strength=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:filter-sharpness"); |
| if (value != (char *) NULL) |
| configure.filter_sharpness=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:filter-type"); |
| if (value != (char *) NULL) |
| configure.filter_type=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:auto-filter"); |
| if (value != (char *) NULL) |
| configure.autofilter=(int) ParseCommandOption(MagickBooleanOptions, |
| MagickFalse,value); |
| value=GetImageOption(image_info,"webp:alpha-compression"); |
| if (value != (char *) NULL) |
| configure.alpha_compression=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:alpha-filtering"); |
| if (value != (char *) NULL) |
| configure.alpha_filtering=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:alpha-quality"); |
| if (value != (char *) NULL) |
| configure.alpha_quality=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:pass"); |
| if (value != (char *) NULL) |
| configure.pass=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:show-compressed"); |
| if (value != (char *) NULL) |
| configure.show_compressed=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:preprocessing"); |
| if (value != (char *) NULL) |
| configure.preprocessing=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:partitions"); |
| if (value != (char *) NULL) |
| configure.partitions=StringToInteger(value); |
| value=GetImageOption(image_info,"webp:partition-limit"); |
| if (value != (char *) NULL) |
| configure.partition_limit=StringToInteger(value); |
| #if WEBP_DECODER_ABI_VERSION >= 0x0201 |
| value=GetImageOption(image_info,"webp:emulate-jpeg-size"); |
| if (value != (char *) NULL) |
| configure.emulate_jpeg_size=(int) ParseCommandOption(MagickBooleanOptions, |
| MagickFalse,value); |
| value=GetImageOption(image_info,"webp:low-memory"); |
| if (value != (char *) NULL) |
| configure.low_memory=(int) ParseCommandOption(MagickBooleanOptions, |
| MagickFalse,value); |
| value=GetImageOption(image_info,"webp:thread-level"); |
| if (value != (char *) NULL) |
| configure.thread_level=StringToInteger(value); |
| #endif |
| if (WebPValidateConfig(&configure) == 0) |
| ThrowWriterException(ResourceLimitError,"UnableToEncodeImageFile"); |
| /* |
| Allocate memory for pixels. |
| */ |
| (void) TransformImageColorspace(image,sRGBColorspace,exception); |
| pixel_info=AcquireVirtualMemory(image->columns,image->rows* |
| sizeof(*picture.argb)); |
| if (pixel_info == (MemoryInfo *) NULL) |
| ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| picture.argb=(uint32_t *) GetVirtualMemoryBlob(pixel_info); |
| /* |
| Convert image to WebP raster pixels. |
| */ |
| q=picture.argb; |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register const Quantum |
| *magick_restrict p; |
| |
| register ssize_t |
| x; |
| |
| 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++=(uint32_t) (image->alpha_trait != UndefinedPixelTrait ? |
| ScaleQuantumToChar(GetPixelAlpha(image,p)) << 24 : 0xff000000) | |
| (ScaleQuantumToChar(GetPixelRed(image,p)) << 16) | |
| (ScaleQuantumToChar(GetPixelGreen(image,p)) << 8) | |
| (ScaleQuantumToChar(GetPixelBlue(image,p))); |
| p+=GetPixelChannels(image); |
| } |
| status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| webp_status=WebPEncode(&configure,&picture); |
| if (webp_status == 0) |
| { |
| const char |
| *message; |
| |
| switch (picture.error_code) |
| { |
| case VP8_ENC_ERROR_OUT_OF_MEMORY: |
| { |
| message="out of memory"; |
| break; |
| } |
| case VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY: |
| { |
| message="bitstream out of memory"; |
| break; |
| } |
| case VP8_ENC_ERROR_NULL_PARAMETER: |
| { |
| message="NULL parameter"; |
| break; |
| } |
| case VP8_ENC_ERROR_INVALID_CONFIGURATION: |
| { |
| message="invalid configuration"; |
| break; |
| } |
| case VP8_ENC_ERROR_BAD_DIMENSION: |
| { |
| message="bad dimension"; |
| break; |
| } |
| case VP8_ENC_ERROR_PARTITION0_OVERFLOW: |
| { |
| message="partition 0 overflow (> 512K)"; |
| break; |
| } |
| case VP8_ENC_ERROR_PARTITION_OVERFLOW: |
| { |
| message="partition overflow (> 16M)"; |
| break; |
| } |
| case VP8_ENC_ERROR_BAD_WRITE: |
| { |
| message="bad write"; |
| break; |
| } |
| case VP8_ENC_ERROR_FILE_TOO_BIG: |
| { |
| message="file too big (> 4GB)"; |
| break; |
| } |
| #if WEBP_DECODER_ABI_VERSION >= 0x0100 |
| case VP8_ENC_ERROR_USER_ABORT: |
| { |
| message="user abort"; |
| break; |
| } |
| #endif |
| default: |
| { |
| message="unknown exception"; |
| break; |
| } |
| } |
| (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError, |
| (char *) message,"`%s'",image->filename); |
| } |
| picture.argb=(uint32_t *) NULL; |
| WebPPictureFree(&picture); |
| pixel_info=RelinquishVirtualMemory(pixel_info); |
| (void) CloseBlob(image); |
| return(webp_status == 0 ? MagickFalse : MagickTrue); |
| } |
| #endif |
