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DEFINITIONS
This source file includes following definitions.
- ReadINLINEImage
- RegisterINLINEImage
- UnregisterINLINEImage
- WriteINLINEImage
/*
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% Read/Write Inline Images %
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% Software Design %
% Cristy %
% July 1992 %
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% Copyright 1999-2015 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
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% 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. %
% %
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*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/client.h"
#include "magick/display.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/option.h"
#include "magick/pixel-accessor.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
#include "magick/utility.h"
#include "magick/xwindow.h"
#include "magick/xwindow-private.h"
/*
Forward declarations.
*/
static MagickBooleanType
WriteINLINEImage(const ImageInfo *,Image *);
/*
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% R e a d I N L I N E I m a g e %
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% ReadINLINEImage() reads base64-encoded inlines images.
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% The format of the ReadINLINEImage method is:
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% Image *ReadINLINEImage(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 Image *ReadINLINEImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
Image
*image;
MagickBooleanType
status;
register size_t
i;
size_t
quantum;
ssize_t
count;
unsigned char
*inline_image;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
if (LocaleNCompare(image_info->filename,"data:",5) == 0)
return(ReadInlineImage(image_info,image_info->filename,exception));
image=AcquireImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
quantum=MagickMin((size_t) GetBlobSize(image),MagickMaxBufferExtent);
if (quantum == 0)
quantum=MagickMaxBufferExtent;
inline_image=(unsigned char *) AcquireQuantumMemory(quantum,
sizeof(*inline_image));
count=0;
for (i=0; inline_image != (unsigned char *) NULL; i+=count)
{
count=(ssize_t) ReadBlob(image,quantum,inline_image+i);
if (count <= 0)
{
count=0;
if (errno != EINTR)
break;
}
if (~((size_t) i) < (quantum+1))
{
inline_image=(unsigned char *) RelinquishMagickMemory(inline_image);
break;
}
inline_image=(unsigned char *) ResizeQuantumMemory(inline_image,i+count+
quantum+1,sizeof(*inline_image));
}
if (inline_image == (unsigned char *) NULL)
{
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
return((Image *) NULL);
}
inline_image[i+count]='\0';
image=DestroyImageList(image);
image=ReadInlineImage(image_info,(char *) inline_image,exception);
inline_image=(unsigned char *) RelinquishMagickMemory(inline_image);
return(image);
}
/*
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% R e g i s t e r I N L I N E I m a g e %
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% RegisterINLINEImage() adds attributes for the INLINE 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 RegisterINLINEImage method is:
%
% size_t RegisterINLINEImage(void)
%
*/
ModuleExport size_t RegisterINLINEImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("INLINE");
entry->decoder=(DecodeImageHandler *) ReadINLINEImage;
entry->encoder=(EncodeImageHandler *) WriteINLINEImage;
entry->format_type=ImplicitFormatType;
entry->description=ConstantString("Base64-encoded inline images");
entry->module=ConstantString("INLINE");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
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% U n r e g i s t e r I N L I N E I m a g e %
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% UnregisterINLINEImage() removes format registrations made by the
% INLINE module from the list of supported formats.
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% The format of the UnregisterINLINEImage method is:
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% UnregisterINLINEImage(void)
%
*/
ModuleExport void UnregisterINLINEImage(void)
{
(void) UnregisterMagickInfo("INLINE");
}
/*
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% W r i t e I N L I N E I m a g e %
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% WriteINLINEImage() writes an image to a file in INLINE format (Base64).
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% The format of the WriteINLINEImage method is:
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% MagickBooleanType WriteINLINEImage(const ImageInfo *image_info,
% Image *image)
%
% A description of each parameter follows.
%
% o image_info: the image info.
%
% o image: The image.
%
*/
static MagickBooleanType WriteINLINEImage(const ImageInfo *image_info,
Image *image)
{
char
*base64,
message[MaxTextExtent];
const MagickInfo
*magick_info;
ExceptionInfo
*exception;
Image
*write_image;
ImageInfo
*write_info;
MagickBooleanType
status;
size_t
blob_length,
encode_length;
unsigned char
*blob;
/*
Convert image to base64-encoding.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
exception=(&image->exception);
write_info=CloneImageInfo(image_info);
(void) SetImageInfo(write_info,1,exception);
if (LocaleCompare(write_info->magick,"INLINE") == 0)
(void) CopyMagickString(write_info->magick,image->magick,MaxTextExtent);
magick_info=GetMagickInfo(write_info->magick,exception);
if ((magick_info == (const MagickInfo *) NULL) ||
(GetMagickMimeType(magick_info) == (const char *) NULL))
ThrowWriterException(CorruptImageError,"ImageTypeNotSupported");
(void) CopyMagickString(image->filename,write_info->filename,MaxTextExtent);
blob_length=2048;
write_image=CloneImage(image,0,0,MagickTrue,exception);
if (write_image == (Image *) NULL)
{
write_info=DestroyImageInfo(write_info);
return(MagickTrue);
}
blob=(unsigned char *) ImageToBlob(write_info,write_image,&blob_length,
exception);
write_image=DestroyImage(write_image);
write_info=DestroyImageInfo(write_info);
if (blob == (unsigned char *) NULL)
return(MagickFalse);
encode_length=0;
base64=Base64Encode(blob,blob_length,&encode_length);
blob=(unsigned char *) RelinquishMagickMemory(blob);
if (base64 == (char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
/*
Write base64-encoded image.
*/
status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
if (status == MagickFalse)
{
base64=DestroyString(base64);
return(status);
}
(void) FormatLocaleString(message,MaxTextExtent,"data:%s;base64,",
GetMagickMimeType(magick_info));
(void) WriteBlobString(image,message);
(void) WriteBlobString(image,base64);
base64=DestroyString(base64);
return(MagickTrue);
}