forked from openkylin/imagemagick
364 lines
13 KiB
C
364 lines
13 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% IIIII N N L IIIII N N EEEEE %
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% I NN N L I NN N E %
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% I N N N L I N N N EEE %
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% I N NN L I N NN E %
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% IIIII N N LLLLL IIIII N N EEEEE %
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% %
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% %
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% Read/Write Inline Images %
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% %
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% Software Design %
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% Cristy %
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% July 1992 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "magick/studio.h"
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#include "magick/blob.h"
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#include "magick/blob-private.h"
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#include "magick/client.h"
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#include "magick/display.h"
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#include "magick/exception.h"
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#include "magick/exception-private.h"
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#include "magick/image.h"
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#include "magick/image-private.h"
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#include "magick/list.h"
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#include "magick/magick.h"
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#include "magick/memory_.h"
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#include "magick/option.h"
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#include "magick/pixel-accessor.h"
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#include "magick/quantum-private.h"
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#include "magick/static.h"
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#include "magick/string_.h"
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#include "magick/module.h"
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#include "magick/utility.h"
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#include "magick/xwindow.h"
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#include "magick/xwindow-private.h"
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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WriteINLINEImage(const ImageInfo *,Image *);
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e a d I N L I N E I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% ReadINLINEImage() reads base64-encoded inlines images.
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%
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% The format of the ReadINLINEImage method is:
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%
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% Image *ReadINLINEImage(const ImageInfo *image_info,
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% ExceptionInfo *exception)
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%
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% A description of each parameter follows:
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%
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% o image_info: the image info.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static Image *ReadINLINEImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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Image
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*image;
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MagickBooleanType
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status;
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size_t
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i;
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size_t
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quantum;
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ssize_t
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count;
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unsigned char
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*inline_image;
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/*
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Open image file.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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if (LocaleNCompare(image_info->filename,"data:",5) == 0)
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{
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char
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*filename;
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Image
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*data_image;
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filename=AcquireString("data:");
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(void) ConcatenateMagickString(filename,image_info->filename,
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MagickPathExtent);
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data_image=ReadInlineImage(image_info,filename,exception);
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filename=DestroyString(filename);
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return(data_image);
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}
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image=AcquireImage(image_info);
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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if (status == MagickFalse)
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{
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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quantum=MagickMin((size_t) GetBlobSize(image),MagickMaxBufferExtent);
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if (quantum == 0)
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quantum=MagickMaxBufferExtent;
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inline_image=(unsigned char *) AcquireQuantumMemory(quantum,
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sizeof(*inline_image));
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count=0;
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for (i=0; inline_image != (unsigned char *) NULL; i+=count)
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{
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count=(ssize_t) ReadBlob(image,quantum,inline_image+i);
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if (count <= 0)
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{
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count=0;
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if (errno != EINTR)
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break;
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}
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if (~((size_t) i) < (quantum+1))
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{
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inline_image=(unsigned char *) RelinquishMagickMemory(inline_image);
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break;
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}
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inline_image=(unsigned char *) ResizeQuantumMemory(inline_image,i+count+
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quantum+1,sizeof(*inline_image));
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}
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if (inline_image == (unsigned char *) NULL)
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{
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(void) ThrowMagickException(exception,GetMagickModule(),
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ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
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return((Image *) NULL);
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}
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inline_image[i+count]='\0';
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image=DestroyImageList(image);
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image=ReadInlineImage(image_info,(char *) inline_image,exception);
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inline_image=(unsigned char *) RelinquishMagickMemory(inline_image);
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return(image);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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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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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RegisterINLINEImage() adds attributes for the INLINE image format to
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% the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterINLINEImage method is:
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%
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% size_t RegisterINLINEImage(void)
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%
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*/
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ModuleExport size_t RegisterINLINEImage(void)
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{
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MagickInfo
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*entry;
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entry=SetMagickInfo("DATA");
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entry->decoder=(DecodeImageHandler *) ReadINLINEImage;
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entry->encoder=(EncodeImageHandler *) WriteINLINEImage;
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entry->format_type=ImplicitFormatType;
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entry->description=ConstantString("Base64-encoded inline images");
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entry->magick_module=ConstantString("INLINE");
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(void) RegisterMagickInfo(entry);
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entry=SetMagickInfo("INLINE");
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entry->decoder=(DecodeImageHandler *) ReadINLINEImage;
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entry->encoder=(EncodeImageHandler *) WriteINLINEImage;
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entry->format_type=ImplicitFormatType;
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entry->description=ConstantString("Base64-encoded inline images");
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entry->magick_module=ConstantString("INLINE");
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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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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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% UnregisterINLINEImage() removes format registrations made by the
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% INLINE module from the list of supported formats.
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%
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% The format of the UnregisterINLINEImage method is:
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%
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% UnregisterINLINEImage(void)
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%
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*/
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ModuleExport void UnregisterINLINEImage(void)
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{
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(void) UnregisterMagickInfo("INLINE");
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(void) UnregisterMagickInfo("DATA");
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W r i t e I N L I N E I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% WriteINLINEImage() writes an image to a file in INLINE format (Base64).
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%
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% The format of the WriteINLINEImage method is:
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%
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% MagickBooleanType WriteINLINEImage(const ImageInfo *image_info,
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% Image *image)
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%
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% A description of each parameter follows.
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%
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% o image_info: the image info.
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%
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% o image: The image.
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%
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*/
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static MagickBooleanType WriteINLINEImage(const ImageInfo *image_info,
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Image *image)
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{
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char
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*base64,
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message[MaxTextExtent];
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const MagickInfo
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*magick_info;
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ExceptionInfo
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*exception;
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Image
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*write_image;
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ImageInfo
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*write_info;
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MagickBooleanType
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status;
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size_t
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blob_length,
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encode_length;
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unsigned char
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*blob;
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/*
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Convert image to base64-encoding.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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assert(image != (Image *) NULL);
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assert(image->signature == MagickCoreSignature);
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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exception=(&image->exception);
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write_info=CloneImageInfo(image_info);
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(void) SetImageInfo(write_info,1,exception);
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if (LocaleCompare(write_info->magick,"INLINE") == 0)
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(void) CopyMagickString(write_info->magick,image->magick,MaxTextExtent);
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magick_info=GetMagickInfo(write_info->magick,exception);
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if ((magick_info == (const MagickInfo *) NULL) ||
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(GetMagickMimeType(magick_info) == (const char *) NULL))
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{
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write_info=DestroyImageInfo(write_info);
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ThrowWriterException(CorruptImageError,"ImageTypeNotSupported");
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}
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(void) CopyMagickString(image->filename,write_info->filename,MaxTextExtent);
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blob_length=2048;
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write_image=CloneImage(image,0,0,MagickTrue,exception);
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if (write_image == (Image *) NULL)
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{
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write_info=DestroyImageInfo(write_info);
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return(MagickTrue);
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}
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blob=(unsigned char *) ImageToBlob(write_info,write_image,&blob_length,
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exception);
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write_image=DestroyImage(write_image);
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write_info=DestroyImageInfo(write_info);
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if (blob == (unsigned char *) NULL)
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return(MagickFalse);
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encode_length=0;
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base64=Base64Encode(blob,blob_length,&encode_length);
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blob=(unsigned char *) RelinquishMagickMemory(blob);
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if (base64 == (char *) NULL)
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ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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/*
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Write base64-encoded image.
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*/
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status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
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if (status == MagickFalse)
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{
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base64=DestroyString(base64);
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return(status);
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}
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(void) FormatLocaleString(message,MaxTextExtent,"data:%s;base64,",
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GetMagickMimeType(magick_info));
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(void) WriteBlobString(image,message);
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(void) WriteBlobString(image,base64);
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base64=DestroyString(base64);
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return(MagickTrue);
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}
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