File: //opt/ImageMagick-7.0.9-3/coders/jxl.c
/*
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% %
% %
% %
% JJJ X X L %
% J X X L %
% J X L %
% J J X X L %
% JJ X X LLLLL %
% %
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% Read/Write JPEG XL Lossless JPEG1 Recompression %
% %
% The JPEG XL Project %
% September 2019 %
% %
% %
% 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/attribute.h"
#include "MagickCore/blob.h"
#include "MagickCore/blob-private.h"
#include "MagickCore/cache.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/memory_.h"
#include "MagickCore/monitor.h"
#include "MagickCore/monitor-private.h"
#include "MagickCore/static.h"
#include "MagickCore/string_.h"
#include "MagickCore/module.h"
#if defined(MAGICKCORE_JXL_DELEGATE)
#include <brunsli/decode.h>
#include <brunsli/encode.h>
/*
Forward declarations.
*/
static MagickBooleanType
WriteJXLImage(const ImageInfo *,Image *);
#endif
#if defined(MAGICKCORE_JXL_DELEGATE)
/*
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% R e a d J X L I m a g e %
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% %
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%
% ReadJXLImage() reads a JXL image file and returns it. It allocates
% the memory necessary for the new Image structure and returns a pointer to
% the new image.
%
% The format of the ReadJXLImage method is:
%
% Image *ReadJXLImage(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.
%
*/
/*
Typedef declarations.
*/
typedef struct OutBuffer
{
unsigned char
*data;
size_t
size;
} OutBuffer;
static size_t AllocOutput(void* data, const uint8_t* buf, size_t count)
{
OutBuffer *buffer=(OutBuffer *) data;
buffer->data=ResizeMagickMemory(buffer->data,buffer->size+count);
if (!buffer->data) return 0;
memcpy(buffer->data+buffer->size, buf, count);
buffer->size+=count;
return(count);
}
static Image *ReadJXLImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
Image
*temp_image,
*result;
MagickBooleanType
status;
OutBuffer
b;
unsigned char
*jxl;
/*
TODO: do we need an Image here? No pixels are needed, but OpenBlob
needs an Image.
*/
temp_image=AcquireImage(image_info, exception);
status=OpenBlob(image_info,temp_image,ReadBinaryBlobMode,exception);
jxl=NULL;
size_t jxlsize = 0;
if (status == MagickTrue)
{
jxlsize=(size_t) GetBlobSize(temp_image);
jxl=(unsigned char *) AcquireMagickMemory(jxlsize);
size_t num_read=ReadBlob(temp_image,jxlsize,jxl);
if (num_read != jxlsize) status=MagickFalse;
}
(void) DestroyImage(temp_image);
b.data=NULL;
b.size=0;
if (status == MagickTrue)
{
status=DecodeBrunsli(jxlsize,jxl,&b,AllocOutput) == 1 ?
MagickTrue : MagickFalse;
}
(void) RelinquishMagickMemory(jxl);
result=NULL;
if (status == MagickTrue)
{
ImageInfo* temp_info=AcquireImageInfo();
SetImageInfoBlob(temp_info,b.data,b.size);
result=BlobToImage(temp_info,b.data,b.size,exception);
(void) DestroyImageInfo(temp_info);
}
(void) RelinquishMagickMemory(b.data);
return(result);
}
#endif
/*
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% R e g i s t e r J X L I m a g e %
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%
% RegisterJXLImage() adds properties for the JXL image format to
% the list of supported formats. The properties 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 RegisterJXLImage method is:
%
% size_t RegisterJXLImage(void)
%
*/
ModuleExport size_t RegisterJXLImage(void)
{
MagickInfo
*entry;
entry=AcquireMagickInfo("JXL", "JXL", "JPEG XL Lossless JPEG1 Recompression");
#if defined(MAGICKCORE_JXL_DELEGATE)
entry->decoder=(DecodeImageHandler *) ReadJXLImage;
entry->encoder=(EncodeImageHandler *) WriteJXLImage;
#endif
entry->note=ConstantString(
"JPEG1 recompression as specified in https://arxiv.org/pdf/1908.03565.pdf"
" page 135. Full JPEG XL support will be implemented in this coder later.");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
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% U n r e g i s t e r J X L I m a g e %
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%
% UnregisterJXLImage() removes format registrations made by the
% JXL module from the list of supported formats.
%
% The format of the UnregisterJXLImage method is:
%
% UnregisterJXLImage(void)
%
*/
ModuleExport void UnregisterJXLImage(void)
{
(void) UnregisterMagickInfo("JXL");
}
#if defined(MAGICKCORE_JXL_DELEGATE)
/*
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% W r i t e J X L I m a g e %
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%
% WriteJXLImage() writes a JXL image file and returns it. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the WriteJXLImage method is:
%
% MagickBooleanType WriteJXLImage(const ImageInfo *image_info,
% Image *image)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o image: The image.
%
%
*/
static MagickBooleanType WriteJXLImage(const ImageInfo *image_info,
Image *image)
{
ExceptionInfo
*exception;
Image
*temp_image;
ImageInfo
*temp_info;
MagickBooleanType
status;
OutBuffer
b;
size_t
jpegsize;
unsigned char
*jpeg;
exception=AcquireExceptionInfo();
/*
TODO: can cloning the image be avoided? The pixels don't need to be cloned,
only filename or blob information. ImageToBlob overwrites this information.
*/
temp_image=CloneImage(image, 0, 0, MagickTrue, exception);
temp_info=AcquireImageInfo();
(void) CopyMagickString(temp_image->magick,"JPG",MaxTextExtent);
jpeg=ImageToBlob(temp_info,temp_image,&jpegsize,exception);
(void) DestroyImage(temp_image);
(void) DestroyImageInfo(temp_info);
b.data=NULL;
b.size=0;
status=EncodeBrunsli(jpegsize,jpeg,&b,AllocOutput) == 1 ?
MagickTrue : MagickFalse;
if (status == MagickTrue)
{
status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
}
if (status == MagickTrue)
{
WriteBlob(image,b.size,b.data);
CloseBlob(image);
}
(void) RelinquishMagickMemory(b.data);
if(exception) exception=DestroyExceptionInfo(exception);
return(status);
}
#endif