/
webp.c
1232 lines (1109 loc) · 37.7 KB
/
webp.c
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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 1999-2021 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/layer.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/property.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>
#include <webp/demux.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)
{
const unsigned char
*p;
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)
size_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 <= (length-TAG_SIZE-TAG_SIZE-4))
{
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 int FillBasicWEBPInfo(Image *image,const uint8_t *stream,size_t length,
WebPDecoderConfig *configure)
{
WebPBitstreamFeatures
*magick_restrict features = &configure->input;
int
webp_status;
webp_status=WebPGetFeatures(stream,length,features);
if (webp_status != VP8_STATUS_OK)
return(webp_status);
image->columns=(size_t) features->width;
image->rows=(size_t) features->height;
image->depth=8;
image->alpha_trait=features->has_alpha != 0 ? BlendPixelTrait :
UndefinedPixelTrait;
return(webp_status);
}
static int ReadSingleWEBPImage(Image *image,const uint8_t *stream,
size_t length,WebPDecoderConfig *configure,ExceptionInfo *exception,
MagickBooleanType is_first)
{
int
webp_status;
unsigned char
*p;
size_t
canvas_width,
canvas_height,
image_width,
image_height;
ssize_t
x_offset,
y_offset,
y;
WebPDecBuffer
*magick_restrict webp_image;
MagickBooleanType
status;
webp_image=&configure->output;
if (is_first)
{
canvas_width=image->columns;
canvas_height=image->rows;
x_offset=image->page.x;
y_offset=image->page.y;
image->page.x=0;
image->page.y=0;
}
else
{
x_offset=0;
y_offset=0;
}
webp_status=FillBasicWEBPInfo(image,stream,length,configure);
image_width=image->columns;
image_height=image->rows;
if (is_first)
{
image->columns=canvas_width;
image->rows=canvas_height;
}
if (webp_status != VP8_STATUS_OK)
return(webp_status);
if (IsWEBPImageLossless(stream,length) != MagickFalse)
image->quality=100;
webp_status=WebPDecode(stream,length,configure);
if (webp_status != VP8_STATUS_OK)
return(webp_status);
p=(unsigned char *) webp_image->u.RGBA.rgba;
for (y=0; y < (ssize_t) image->rows; y++)
{
Quantum
*q;
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++)
{
if ((x >= x_offset && x < (ssize_t) (x_offset+image_width)) &&
(y >= y_offset && y < (ssize_t) (y_offset+image_height)))
{
SetPixelRed(image,ScaleCharToQuantum(*p++),q);
SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
SetPixelAlpha(image,ScaleCharToQuantum(*p++),q);
}
else
{
SetPixelRed(image,0,q);
SetPixelGreen(image,0,q);
SetPixelBlue(image,0,q);
SetPixelAlpha(image,0,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;
WebPMux
*mux;
/*
Extract any profiles:
https://developers.google.com/speed/webp/docs/container-api.
*/
content.bytes=stream;
content.size=length;
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
return(webp_status);
}
#if defined(MAGICKCORE_WEBPMUX_DELEGATE)
static int ReadAnimatedWEBPImage(const ImageInfo *image_info,Image *image,
uint8_t *stream,size_t length,WebPDecoderConfig *configure,
ExceptionInfo *exception)
{
Image
*original_image;
int
image_count,
webp_status;
size_t
canvas_width,
canvas_height;
WebPData
data;
WebPDemuxer
*demux;
WebPIterator
iter;
image_count=0;
webp_status=0;
original_image=image;
webp_status=FillBasicWEBPInfo(image,stream,length,configure);
canvas_width=image->columns;
canvas_height=image->rows;
data.bytes=stream;
data.size=length;
{
WebPMux
*mux;
WebPMuxAnimParams
params;
WebPMuxError
status;
mux=WebPMuxCreate(&data,0);
status=WebPMuxGetAnimationParams(mux,¶ms);
if (status >= 0)
image->iterations=params.loop_count;
WebPMuxDelete(mux);
}
demux=WebPDemux(&data);
if (WebPDemuxGetFrame(demux,1,&iter))
{
do
{
if (image_count != 0)
{
AcquireNextImage(image_info,image,exception);
if (GetNextImageInList(image) == (Image *) NULL)
break;
image=SyncNextImageInList(image);
CloneImageProperties(image,original_image);
image->page.x=iter.x_offset;
image->page.y=iter.y_offset;
webp_status=ReadSingleWEBPImage(image,iter.fragment.bytes,
iter.fragment.size,configure,exception,MagickFalse);
}
else
{
image->page.x=iter.x_offset;
image->page.y=iter.y_offset;
webp_status=ReadSingleWEBPImage(image,iter.fragment.bytes,
iter.fragment.size,configure,exception,MagickTrue);
}
if (webp_status != VP8_STATUS_OK)
break;
image->page.width=canvas_width;
image->page.height=canvas_height;
image->ticks_per_second=100;
image->delay=iter.duration/10;
image->dispose=NoneDispose;
if (iter.dispose_method == WEBP_MUX_DISPOSE_BACKGROUND)
image->dispose=BackgroundDispose;
(void) SetImageProperty(image,"webp:mux-blend",
"AtopPreviousAlphaBlend",exception);
if (iter.blend_method == WEBP_MUX_BLEND)
(void) SetImageProperty(image,"webp:mux-blend",
"AtopBackgroundAlphaBlend",exception);
image_count++;
} while (WebPDemuxNextFrame(&iter));
WebPDemuxReleaseIterator(&iter);
}
WebPDemuxDelete(demux);
return(webp_status);
}
#endif
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;
size_t
length;
ssize_t
count;
unsigned char
header[12],
*stream;
WebPDecoderConfig
configure;
WebPDecBuffer
*magick_restrict webp_image = &configure.output;
/*
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=FillBasicWEBPInfo(image,stream,length,&configure);
if (webp_status == VP8_STATUS_OK) {
if (configure.input.has_animation) {
#if defined(MAGICKCORE_WEBPMUX_DELEGATE)
webp_status=ReadAnimatedWEBPImage(image_info,image,stream,length,
&configure,exception);
#else
webp_status=VP8_STATUS_UNSUPPORTED_FEATURE;
#endif
} else {
webp_status=ReadSingleWEBPImage(image,stream,length,&configure,exception,MagickFalse);
}
}
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");
}
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;
#if !defined(MAGICKCORE_WEBPMUX_DELEGATE)
entry->flags^=CoderAdjoinFlag;
#endif
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 const char * WebPErrorCodeMessage(WebPEncodingError error_code)
{
switch (error_code)
{
case VP8_ENC_OK:
return NULL;
case VP8_ENC_ERROR_OUT_OF_MEMORY:
return "out of memory";
case VP8_ENC_ERROR_BITSTREAM_OUT_OF_MEMORY:
return "bitstream out of memory";
case VP8_ENC_ERROR_NULL_PARAMETER:
return "NULL parameter";
case VP8_ENC_ERROR_INVALID_CONFIGURATION:
return "invalid configuration";
case VP8_ENC_ERROR_BAD_DIMENSION:
return "bad dimension";
case VP8_ENC_ERROR_PARTITION0_OVERFLOW:
return "partition 0 overflow (> 512K)";
case VP8_ENC_ERROR_PARTITION_OVERFLOW:
return "partition overflow (> 16M)";
case VP8_ENC_ERROR_BAD_WRITE:
return "bad write";
case VP8_ENC_ERROR_FILE_TOO_BIG:
return "file too big (> 4GB)";
#if WEBP_ENCODER_ABI_VERSION >= 0x0100
case VP8_ENC_ERROR_USER_ABORT:
return "user abort";
case VP8_ENC_ERROR_LAST:
return "error last";
#endif
}
return "unknown exception";
}
static MagickBooleanType WriteSingleWEBPPicture(const ImageInfo *image_info,
Image *image,WebPConfig *configure,WebPPicture *picture,ExceptionInfo *exception)
{
MagickBooleanType
status;
uint32_t
*magick_restrict q;
ssize_t
y;
MemoryInfo
*pixel_info;
#if WEBP_ENCODER_ABI_VERSION >= 0x0100
picture->progress_hook=WebPEncodeProgress;
picture->user_data=(void *) image;
#endif
picture->width=(int) image->columns;
picture->height=(int) image->rows;
picture->argb_stride=(int) image->columns;
picture->use_argb=1;
/*
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.
*/
status=MagickFalse;
q=picture->argb;
for (y=0; y < (ssize_t) image->rows; y++)
{
const Quantum
*magick_restrict p;
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;
}
if (status != MagickFalse)
status=(MagickBooleanType) WebPEncode(configure, picture);
RelinquishVirtualMemory(pixel_info);
if (status == MagickFalse)
(void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
WebPErrorCodeMessage(picture->error_code),"`%s'",
image->filename);
return(status);
}
static MagickBooleanType WriteSingleWEBPImage(const ImageInfo *image_info,
Image *image,WebPConfig *configure,WebPMemoryWriter *writer,
ExceptionInfo *exception)
{
MagickBooleanType
status;
WebPPicture
picture;
if (WebPPictureInit(&picture) == 0)
ThrowWriterException(ResourceLimitError,"UnableToEncodeImageFile");
picture.writer=WebPMemoryWrite;
picture.custom_ptr=writer;
status=WriteSingleWEBPPicture(image_info,image,configure,&picture,exception);
WebPPictureFree(&picture);
return(status);
}
#if defined(MAGICKCORE_WEBPMUX_DELEGATE)
static MagickBooleanType WriteAnimatedWEBPImage(const ImageInfo *image_info,
Image *image,WebPConfig *configure,WebPData *webp_data,
ExceptionInfo *exception)
{
Image
*first_image;
size_t
effective_delta,
frame_timestamp;
WebPAnimEncoder
*enc;
WebPAnimEncoderOptions
enc_options;
WebPPicture
picture;
MagickBooleanType
status;
first_image=CoalesceImages(image,exception);
if (first_image == (Image *) NULL)
return(MagickFalse);
image=first_image;
effective_delta=0;
frame_timestamp=0;
(void) WebPAnimEncoderOptionsInit(&enc_options);
if (image_info->verbose)
enc_options.verbose=1;
enc=WebPAnimEncoderNew((int) image->page.width,(int) image->page.height,
&enc_options);
status=MagickTrue;
while (image != NULL)
{
status=(MagickBooleanType) WebPPictureInit(&picture);
if (status == MagickFalse)
{
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitError,"UnableToEncodeImageFile","`%s'",image->filename);
break;
}
status=WriteSingleWEBPPicture(image_info,image,configure,&picture,
exception);
if (status == MagickFalse)
break;
status=(MagickBooleanType) WebPAnimEncoderAdd(enc,&picture,
(int) frame_timestamp,configure);
WebPPictureFree(&picture);
if (status == MagickFalse)
{
(void) ThrowMagickException(exception,GetMagickModule(),
CoderError,WebPAnimEncoderGetError(enc),"`%s'",image->filename);
break;
}
effective_delta=image->delay*1000/image->ticks_per_second;
if (effective_delta < 10)
effective_delta=100; /* Consistent with gif2webp */
frame_timestamp+=effective_delta;
image=GetNextImageInList(image);
}
if (status != MagickFalse)
{
// add last null frame and assemble picture.
status=(MagickBooleanType) WebPAnimEncoderAdd(enc,(WebPPicture *) NULL,
(int) frame_timestamp,configure);
if (status != MagickFalse)
status=(MagickBooleanType) WebPAnimEncoderAssemble(enc,webp_data);
if (status == MagickFalse)
(void) ThrowMagickException(exception,GetMagickModule(),
CoderError,WebPAnimEncoderGetError(enc),"`%s'",
first_image->filename);
}
WebPAnimEncoderDelete(enc);
DestroyImageList(first_image);
return(status);
}
static MagickBooleanType WriteWEBPImageProfile(Image *image,
WebPData *webp_data,ExceptionInfo *exception)
{
const StringInfo
*icc_profile,
*exif_profile,
*xmp_profile;
WebPData
chunk;
WebPMux
*mux;