/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 %
% Cristy %
% March 2011 %
% %
% %
% Copyright 1999-2019 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 %
% %
% https://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/profile.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>
#if defined(MAGICKCORE_WEBPMUX_DELEGATE)
#include <webp/mux.h>
#endif
#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 (length <= VP8_CHUNK_INDEX)
return(MagickFalse);
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+TAG_SIZE <= (ssize_t) (length-TAG_SIZE))
{
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)
{
#define ThrowWEBPException(severity,tag) \
{ \
if (stream != (unsigned char *) NULL) \
stream=(unsigned char*) RelinquishMagickMemory(stream); \
if (webp_image != (WebPDecBuffer *) NULL) \
WebPFreeDecBuffer(webp_image); \
ThrowReaderException(severity,tag); \
}
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);
}
stream=(unsigned char *) NULL;
if (WebPInitDecoderConfig(&configure) == 0)
ThrowReaderException(ResourceLimitError,"UnableToDecodeImageFile");
webp_image->colorspace=MODE_RGBA;
count=ReadBlob(image,12,header);
if (count != 12)
ThrowWEBPException(CorruptImageError,"InsufficientImageDataInFile");
status=IsWEBP(header,count);
if (status == MagickFalse)
ThrowWEBPException(CorruptImageError,"CorruptImage");
length=(size_t) (ReadWebPLSBWord(header+4)+8);
if (length < 12)
ThrowWEBPException(CorruptImageError,"CorruptImage");
if (length > GetBlobSize(image))
ThrowWEBPException(CorruptImageError,"InsufficientImageDataInFile");
stream=(unsigned char *) AcquireQuantumMemory(length,sizeof(*stream));
if (stream == (unsigned char *) NULL)
ThrowWEBPException(ResourceLimitError,"MemoryAllocationFailed");
(void) memcpy(stream,header,12);
count=ReadBlob(image,length-12,stream+12);
if (count != (ssize_t) (length-12))
ThrowWEBPException(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)
{
stream=(unsigned char*) RelinquishMagickMemory(stream);
(void) CloseBlob(image);
return(DestroyImageList(image));
}
if (IsWEBPImageLossless(stream,length) != MagickFalse)
image->quality=100;
webp_status=WebPDecode(stream,length,&configure);
}
if (webp_status != VP8_STATUS_OK)
switch (webp_status)
{
case VP8_STATUS_OUT_OF_MEMORY:
{
ThrowWEBPException(ResourceLimitError,"MemoryAllocationFailed");
break;
}
case VP8_STATUS_INVALID_PARAM:
{
ThrowWEBPException(CorruptImageError,"invalid parameter");
break;
}
case VP8_STATUS_BITSTREAM_ERROR:
{
ThrowWEBPException(CorruptImageError,"CorruptImage");
break;
}
case VP8_STATUS_UNSUPPORTED_FEATURE:
{
ThrowWEBPException(CoderError,"DataEncodingSchemeIsNotSupported");
break;
}
case VP8_STATUS_SUSPENDED:
{
ThrowWEBPException(CorruptImageError,"decoder suspended");
break;
}
case VP8_STATUS_USER_ABORT:
{
ThrowWEBPException(CorruptImageError,"user abort");
break;
}
case VP8_STATUS_NOT_ENOUGH_DATA:
{
ThrowWEBPException(CorruptImageError,"InsufficientImageDataInFile");
break;
}
default:
ThrowWEBPException(CorruptImageError,"CorruptImage");
}
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);
#if defined(MAGICKCORE_WEBPMUX_DELEGATE)
{
StringInfo
*profile;
uint32_t
webp_flags = 0;
WebPData
chunk,
content = { stream, length };
WebPMux
*mux;
/*
Extract any profiles.
*/
mux=WebPMuxCreate(&content,0);
(void) memset(&chunk,0,sizeof(chunk));
WebPMuxGetFeatures(mux,&webp_flags);
if (webp_flags & ICCP_FLAG)
{
WebPMuxGetChunk(mux,"ICCP",&chunk);
profile=BlobToStringInfo(chunk.bytes,chunk.size);
if (profile != (StringInfo *) NULL)
{
SetImageProfile(image,"ICC",profile,exception);
profile=DestroyStringInfo(profile);
}
}
if (webp_flags & EXIF_FLAG)
{
WebPMuxGetChunk(mux,"EXIF",&chunk);
profile=BlobToStringInfo(chunk.bytes,chunk.size);
if (profile != (StringInfo *) NULL)
{
SetImageProfile(image,"EXIF",profile,exception);
profile=DestroyStringInfo(profile);
}
}
if (webp_flags & XMP_FLAG)
{
WebPMuxGetChunk(mux,"XMP",&chunk);
profile=BlobToStringInfo(chunk.bytes,chunk.size);
if (profile != (StringInfo *) NULL)
{
SetImageProfile(image,"XMP",profile,exception);
profile=DestroyStringInfo(profile);
}
}
WebPMuxDelete(mux);
}
#endif
stream=(unsigned char*) RelinquishMagickMemory(stream);
(void) CloseBlob(image);
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]",
(WebPGetEncoderVersion() >> 16) & 0xff,
(WebPGetEncoderVersion() >> 8) & 0xff,
(WebPGetEncoderVersion() >> 0) & 0xff,WEBP_ENCODER_ABI_VERSION);
#endif
entry->mime_type=ConstantString("image/webp");
entry->flags|=CoderDecoderSeekableStreamFlag;
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_ENCODER_ABI_VERSION >= 0x0100
static int WebPEncodeProgress(int percent,const WebPPicture* picture)
{
#define EncodeImageTag "Encode/Image"
Image
*image;
MagickBooleanType
status;
image=(Image *) picture->user_data;
status=SetImageProgress(image,EncodeImageTag,percent-1,100);
return(status == MagickFalse ? 0 : 1);
}
#endif
#if !defined(MAGICKCORE_WEBPMUX_DELEGATE)
static int WebPEncodeWriter(const unsigned char *stream,size_t length,
const WebPPicture *const picture)
{
Image
*image;
image=(Image *) picture->custom_ptr;
return(length != 0 ? (WriteBlob(image,length,stream) == (ssize_t) length) : 1);
}
#endif
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;
WebPAuxStats
statistics;
WebPConfig
configure;
#if defined(MAGICKCORE_WEBPMUX_DELEGATE)
WebPMemoryWriter
writer_info;
#endif
WebPPicture
picture;
/*
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");
#if !defined(MAGICKCORE_WEBPMUX_DELEGATE)
picture.writer=WebPEncodeWriter;
picture.custom_ptr=(void *) image;
#else
WebPMemoryWriterInit(&writer_info);
picture.writer=WebPMemoryWrite;
picture.custom_ptr=(&writer_info);
#endif
#if WEBP_ENCODER_ABI_VERSION >= 0x0100
picture.progress_hook=WebPEncodeProgress;
picture.user_data=(void *) image;
#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_ENCODER_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_ENCODER_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 WEBP_ENCODER_ABI_VERSION >= 0x020e
value=GetImageOption(image_info,"webp:use-sharp-yuv");
if (value != (char *) NULL)
configure.use_sharp_yuv=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 ? (uint32_t)
ScaleQuantumToChar(GetPixelAlpha(image,p)) << 24 : 0xff000000) |
((uint32_t) ScaleQuantumToChar(GetPixelRed(image,p)) << 16) |
((uint32_t) ScaleQuantumToChar(GetPixelGreen(image,p)) << 8) |
((uint32_t) 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_ENCODER_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);
}
#if defined(MAGICKCORE_WEBPMUX_DELEGATE)
{
const StringInfo
*profile;
WebPData
chunk,
image_chunk = { writer_info.mem, writer_info.size };
WebPMux
*mux;
WebPMuxError
mux_error;
/*
Set image profiles (if any).
*/
mux_error=WEBP_MUX_OK;
(void) memset(&chunk,0,sizeof(chunk));
mux=WebPMuxNew();
profile=GetImageProfile(image,"ICC");
if ((profile != (StringInfo *) NULL) && (mux_error == WEBP_MUX_OK))
{
chunk.bytes=GetStringInfoDatum(profile);
chunk.size=GetStringInfoLength(profile);
mux_error=WebPMuxSetChunk(mux,"ICCP",&chunk,0);
}
profile=GetImageProfile(image,"EXIF");
if ((profile != (StringInfo *) NULL) && (mux_error == WEBP_MUX_OK))
{
chunk.bytes=GetStringInfoDatum(profile);
chunk.size=GetStringInfoLength(profile);
mux_error=WebPMuxSetChunk(mux,"EXIF",&chunk,0);
}
profile=GetImageProfile(image,"XMP");
if ((profile != (StringInfo *) NULL) && (mux_error == WEBP_MUX_OK))
{
chunk.bytes=GetStringInfoDatum(profile);
chunk.size=GetStringInfoLength(profile);
mux_error=WebPMuxSetChunk(mux,"XMP",&chunk,0);
}
if (mux_error != WEBP_MUX_OK)
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitError,"UnableToEncodeImageFile","`%s'",image->filename);
if (chunk.size != 0)
{
WebPData
picture_profiles = { writer_info.mem, writer_info.size };
/*
Replace original container with image profile (if any).
*/
WebPMuxSetImage(mux,&image_chunk,1);
mux_error=WebPMuxAssemble(mux,&picture_profiles);
WebPMemoryWriterClear(&writer_info);
writer_info.size=picture_profiles.size;
writer_info.mem=(unsigned char *) picture_profiles.bytes;
}
WebPMuxDelete(mux);
}
(void) WriteBlob(image,writer_info.size,writer_info.mem);
#endif
picture.argb=(uint32_t *) NULL;
WebPPictureFree(&picture);
#if defined(MAGICKCORE_WEBPMUX_DELEGATE)
WebPMemoryWriterClear(&writer_info);
#endif
pixel_info=RelinquishVirtualMemory(pixel_info);
(void) CloseBlob(image);
return(webp_status == 0 ? MagickFalse : MagickTrue);
}
#endif