forked from openkylin/imagemagick
254 lines
9.9 KiB
C
254 lines
9.9 KiB
C
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% DDDD OOO TTTTT %
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% D D O O T %
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% D D O O T %
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% D D O O T %
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% DDDD OOO T %
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% %
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% %
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% Read/Write Graphviz DOT Format %
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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/constitute.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/monitor.h"
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#include "magick/monitor-private.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/resource_.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-private.h"
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#if defined(MAGICKCORE_GVC_DELEGATE)
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#undef HAVE_CONFIG_H
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#include <gvc.h>
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static GVC_t
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*graphic_context = (GVC_t *) NULL;
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#endif
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#if defined(MAGICKCORE_GVC_DELEGATE)
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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 D O T 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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% ReadDOTImage() reads a Graphviz image file and returns it. It allocates
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% the memory necessary for the new Image structure and returns a pointer to
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% the new image.
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%
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% The format of the ReadDOTImage method is:
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%
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% Image *ReadDOTImage(const ImageInfo *image_info,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 *ReadDOTImage(const ImageInfo *image_info,ExceptionInfo *exception)
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{
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char
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command[MaxTextExtent];
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const char
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*option;
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graph_t
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*graph;
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Image
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*image;
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ImageInfo
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*read_info;
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MagickBooleanType
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status;
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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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assert(graphic_context != (GVC_t *) NULL);
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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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return(DestroyImageList(image));
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read_info=CloneImageInfo(image_info);
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SetImageInfoBlob(read_info,(void *) NULL,0);
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(void) CopyMagickString(read_info->magick,"SVG",MaxTextExtent);
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(void) AcquireUniqueFilename(read_info->filename);
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(void) FormatLocaleString(command,MaxTextExtent,"-Tsvg -o%s %s",
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read_info->filename,image_info->filename);
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#if !defined(WITH_CGRAPH)
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graph=agread(GetBlobFileHandle(image));
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#else
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graph=agread(GetBlobFileHandle(image),(Agdisc_t *) NULL);
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#endif
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if (graph == (graph_t *) NULL)
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{
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(void) RelinquishUniqueFileResource(read_info->filename);
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read_info=DestroyImageInfo(read_info);
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return(DestroyImageList(image));
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}
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option=GetImageOption(image_info,"dot:layout-engine");
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if (option == (const char *) NULL)
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gvLayout(graphic_context,graph,(char *) "dot");
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else
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gvLayout(graphic_context,graph,(char *) option);
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gvRenderFilename(graphic_context,graph,(char *) "svg",read_info->filename);
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gvFreeLayout(graphic_context,graph);
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agclose(graph);
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image=DestroyImageList(image);
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/*
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Read SVG graph.
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*/
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(void) CopyMagickString(read_info->magick,"SVG",MaxTextExtent);
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image=ReadImage(read_info,exception);
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(void) RelinquishUniqueFileResource(read_info->filename);
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read_info=DestroyImageInfo(read_info);
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if (image == (Image *) NULL)
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return((Image *) NULL);
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return(GetFirstImageInList(image));
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}
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#endif
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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 D O T 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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% RegisterDOTImage() adds attributes for the Display Postscript image
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% format to the list of supported formats. The attributes include the image
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% format 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 RegisterDOTImage method is:
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%
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% size_t RegisterDOTImage(void)
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%
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*/
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ModuleExport size_t RegisterDOTImage(void)
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{
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MagickInfo
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*entry;
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entry=SetMagickInfo("DOT");
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#if defined(MAGICKCORE_GVC_DELEGATE)
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entry->decoder=(DecodeImageHandler *) ReadDOTImage;
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#endif
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entry->blob_support=MagickFalse;
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entry->description=ConstantString("Graphviz");
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entry->magick_module=ConstantString("DOT");
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(void) RegisterMagickInfo(entry);
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entry=SetMagickInfo("GV");
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#if defined(MAGICKCORE_GVC_DELEGATE)
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entry->decoder=(DecodeImageHandler *) ReadDOTImage;
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#endif
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entry->blob_support=MagickFalse;
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entry->description=ConstantString("Graphviz");
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entry->magick_module=ConstantString("DOT");
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(void) RegisterMagickInfo(entry);
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#if defined(MAGICKCORE_GVC_DELEGATE)
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graphic_context=gvContext();
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#endif
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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 D O T 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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% UnregisterDOTImage() removes format registrations made by the
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% DOT module from the list of supported formats.
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%
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% The format of the UnregisterDOTImage method is:
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%
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% UnregisterDOTImage(void)
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%
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*/
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ModuleExport void UnregisterDOTImage(void)
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{
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(void) UnregisterMagickInfo("GV");
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(void) UnregisterMagickInfo("DOT");
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#if defined(MAGICKCORE_GVC_DELEGATE)
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if (graphic_context != (GVC_t *) NULL)
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{
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gvFreeContext(graphic_context);
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graphic_context=(GVC_t *) NULL;
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}
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#endif
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}
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