/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % 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 1999-2021 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 "magick/studio.h" #include "magick/blob.h" #include "magick/blob-private.h" #include "magick/client.h" #include "magick/constitute.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/monitor.h" #include "magick/monitor-private.h" #include "magick/option.h" #include "magick/pixel-accessor.h" #include "magick/quantum-private.h" #include "magick/resource_.h" #include "magick/static.h" #include "magick/string_.h" #include "magick/module.h" #include "magick/utility.h" #include "magick/xwindow-private.h" #if defined(MAGICKCORE_GVC_DELEGATE) #undef HAVE_CONFIG_H #include 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[MaxTextExtent]; 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); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) return(DestroyImageList(image)); read_info=CloneImageInfo(image_info); SetImageInfoBlob(read_info,(void *) NULL,0); (void) CopyMagickString(read_info->magick,"SVG",MaxTextExtent); (void) AcquireUniqueFilename(read_info->filename); (void) FormatLocaleString(command,MaxTextExtent,"-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); read_info=DestroyImageInfo(read_info); return(DestroyImageList(image)); } 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); image=DestroyImageList(image); /* Read SVG graph. */ (void) CopyMagickString(read_info->magick,"SVG",MaxTextExtent); 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=SetMagickInfo("DOT"); #if defined(MAGICKCORE_GVC_DELEGATE) entry->decoder=(DecodeImageHandler *) ReadDOTImage; #endif entry->blob_support=MagickFalse; entry->description=ConstantString("Graphviz"); entry->magick_module=ConstantString("DOT"); (void) RegisterMagickInfo(entry); entry=SetMagickInfo("GV"); #if defined(MAGICKCORE_GVC_DELEGATE) entry->decoder=(DecodeImageHandler *) ReadDOTImage; #endif entry->blob_support=MagickFalse; entry->description=ConstantString("Graphviz"); entry->magick_module=ConstantString("DOT"); (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 }