/coders/dot.c
C | 245 lines | 124 code | 7 blank | 114 comment | 17 complexity | f2e729d27ccbe6a0ec2605f8488cb831 MD5 | raw file
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % DDDD OOO TTTTT %
- % D D O O T %
- % D D O O T %
- % D D O O T %
- % DDDD OOO T %
- % %
- % %
- % Read/Write Graphviz DOT Format %
- % %
- % Software Design %
- % Cristy %
- % July 1992 %
- % %
- % %
- % Copyright 1999-2016 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 %
- % %
- % 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. %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- %
- */
- /*
- Include declarations.
- */
- #include "MagickCore/studio.h"
- #include "MagickCore/blob.h"
- #include "MagickCore/blob-private.h"
- #include "MagickCore/client.h"
- #include "MagickCore/constitute.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/option.h"
- #include "MagickCore/resource_.h"
- #include "MagickCore/quantum-private.h"
- #include "MagickCore/static.h"
- #include "MagickCore/string_.h"
- #include "MagickCore/module.h"
- #include "MagickCore/utility.h"
- #include "MagickCore/xwindow-private.h"
- #if defined(MAGICKCORE_GVC_DELEGATE)
- #undef HAVE_CONFIG_H
- #include <gvc.h>
- static GVC_t
- *graphic_context = (GVC_t *) NULL;
- #endif
- #if defined(MAGICKCORE_GVC_DELEGATE)
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % R e a d D O T I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % ReadDOTImage() reads a Graphviz 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 ReadDOTImage method is:
- %
- % Image *ReadDOTImage(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 *ReadDOTImage(const ImageInfo *image_info,ExceptionInfo *exception)
- {
- char
- command[MagickPathExtent];
- const char
- *option;
- graph_t
- *graph;
- Image
- *image;
- ImageInfo
- *read_info;
- MagickBooleanType
- status;
- /*
- 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);
- assert(graphic_context != (GVC_t *) NULL);
- image=AcquireImage(image_info,exception);
- status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
- if (status == MagickFalse)
- return((Image *) NULL);
- read_info=CloneImageInfo(image_info);
- SetImageInfoBlob(read_info,(void *) NULL,0);
- (void) CopyMagickString(read_info->magick,"SVG",MagickPathExtent);
- (void) AcquireUniqueFilename(read_info->filename);
- (void) FormatLocaleString(command,MagickPathExtent,"-Tsvg -o%s %s",
- read_info->filename,image_info->filename);
- #if !defined(WITH_CGRAPH)
- graph=agread(GetBlobFileHandle(image));
- #else
- graph=agread(GetBlobFileHandle(image),(Agdisc_t *) NULL);
- #endif
- if (graph == (graph_t *) NULL)
- {
- (void) RelinquishUniqueFileResource(read_info->filename);
- return ((Image *) NULL);
- }
- option=GetImageOption(image_info,"dot:layout-engine");
- if (option == (const char *) NULL)
- gvLayout(graphic_context,graph,(char *) "dot");
- else
- gvLayout(graphic_context,graph,(char *) option);
- gvRenderFilename(graphic_context,graph,(char *) "svg",read_info->filename);
- gvFreeLayout(graphic_context,graph);
- agclose(graph);
- /*
- Read SVG graph.
- */
- image=ReadImage(read_info,exception);
- (void) RelinquishUniqueFileResource(read_info->filename);
- read_info=DestroyImageInfo(read_info);
- if (image == (Image *) NULL)
- return((Image *) NULL);
- return(GetFirstImageInList(image));
- }
- #endif
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % R e g i s t e r D O T I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % RegisterDOTImage() adds attributes for the Display Postscript 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 RegisterDOTImage method is:
- %
- % size_t RegisterDOTImage(void)
- %
- */
- ModuleExport size_t RegisterDOTImage(void)
- {
- MagickInfo
- *entry;
- entry=AcquireMagickInfo("DOT","DOT","Graphviz");
- #if defined(MAGICKCORE_GVC_DELEGATE)
- entry->decoder=(DecodeImageHandler *) ReadDOTImage;
- #endif
- entry->flags^=CoderBlobSupportFlag;
- (void) RegisterMagickInfo(entry);
- entry=AcquireMagickInfo("DOT","GV","Graphviz");
- #if defined(MAGICKCORE_GVC_DELEGATE)
- entry->decoder=(DecodeImageHandler *) ReadDOTImage;
- #endif
- entry->flags^=CoderBlobSupportFlag;
- (void) RegisterMagickInfo(entry);
- #if defined(MAGICKCORE_GVC_DELEGATE)
- graphic_context=gvContext();
- #endif
- return(MagickImageCoderSignature);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % U n r e g i s t e r D O T I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % UnregisterDOTImage() removes format registrations made by the
- % DOT module from the list of supported formats.
- %
- % The format of the UnregisterDOTImage method is:
- %
- % UnregisterDOTImage(void)
- %
- */
- ModuleExport void UnregisterDOTImage(void)
- {
- (void) UnregisterMagickInfo("GV");
- (void) UnregisterMagickInfo("DOT");
- #if defined(MAGICKCORE_GVC_DELEGATE)
- if (graphic_context != (GVC_t *) NULL)
- {
- gvFreeContext(graphic_context);
- graphic_context=(GVC_t *) NULL;
- }
- #endif
- }