2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read/Write Graphviz DOT Format %
20 % Copyright 1999-2014 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
42 #include "MagickCore/studio.h"
43 #include "MagickCore/blob.h"
44 #include "MagickCore/blob-private.h"
45 #include "MagickCore/client.h"
46 #include "MagickCore/constitute.h"
47 #include "MagickCore/exception.h"
48 #include "MagickCore/exception-private.h"
49 #include "MagickCore/image.h"
50 #include "MagickCore/image-private.h"
51 #include "MagickCore/list.h"
52 #include "MagickCore/magick.h"
53 #include "MagickCore/memory_.h"
54 #include "MagickCore/monitor.h"
55 #include "MagickCore/monitor-private.h"
56 #include "MagickCore/option.h"
57 #include "MagickCore/resource_.h"
58 #include "MagickCore/quantum-private.h"
59 #include "MagickCore/static.h"
60 #include "MagickCore/string_.h"
61 #include "MagickCore/module.h"
62 #include "MagickCore/utility.h"
63 #include "MagickCore/xwindow-private.h"
64 #if defined(MAGICKCORE_GVC_DELEGATE)
71 #if defined(MAGICKCORE_GVC_DELEGATE)
73 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
77 % R e a d D O T I m a g e %
81 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
83 % ReadDOTImage() reads a Graphviz image file and returns it. It allocates
84 % the memory necessary for the new Image structure and returns a pointer to
87 % The format of the ReadDOTImage method is:
89 % Image *ReadDOTImage(const ImageInfo *image_info,ExceptionInfo *exception)
91 % A description of each parameter follows:
93 % o image_info: the image info.
95 % o exception: return any errors or warnings in this structure.
98 static Image *ReadDOTImage(const ImageInfo *image_info,ExceptionInfo *exception)
101 command[MaxTextExtent];
121 assert(image_info != (const ImageInfo *) NULL);
122 assert(image_info->signature == MagickSignature);
123 if (image_info->debug != MagickFalse)
124 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
125 image_info->filename);
126 assert(exception != (ExceptionInfo *) NULL);
127 assert(exception->signature == MagickSignature);
128 image=AcquireImage(image_info,exception);
129 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
130 if (status == MagickFalse)
131 return((Image *) NULL);
132 read_info=CloneImageInfo(image_info);
133 SetImageInfoBlob(read_info,(void *) NULL,0);
134 (void) CopyMagickString(read_info->magick,"SVG",MaxTextExtent);
135 (void) AcquireUniqueFilename(read_info->filename);
136 (void) FormatLocaleString(command,MaxTextExtent,"-Tsvg -o%s %s",
137 read_info->filename,image_info->filename);
138 #if !defined(WITH_CGRAPH)
139 graph=agread(GetBlobFileHandle(image));
141 graph=agread(GetBlobFileHandle(image),(Agdisc_t *) NULL);
143 if (graph == (graph_t *) NULL)
144 return ((Image *) NULL);
145 option=GetImageOption(image_info,"dot:layout-engine");
146 if (option == (const char *) NULL)
147 gvLayout(graphic_context,graph,(char *) "dot");
149 gvLayout(graphic_context,graph,(char *) option);
150 gvRenderFilename(graphic_context,graph,(char *) "svg",read_info->filename);
151 gvFreeLayout(graphic_context,graph);
156 image=ReadImage(read_info,exception);
157 (void) RelinquishUniqueFileResource(read_info->filename);
158 read_info=DestroyImageInfo(read_info);
159 if (image == (Image *) NULL)
160 return((Image *) NULL);
161 return(GetFirstImageInList(image));
166 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
170 % R e g i s t e r D O T I m a g e %
174 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
176 % RegisterDOTImage() adds attributes for the Display Postscript image
177 % format to the list of supported formats. The attributes include the image
178 % format tag, a method to read and/or write the format, whether the format
179 % supports the saving of more than one frame to the same file or blob,
180 % whether the format supports native in-memory I/O, and a brief
181 % description of the format.
183 % The format of the RegisterDOTImage method is:
185 % size_t RegisterDOTImage(void)
188 ModuleExport size_t RegisterDOTImage(void)
193 entry=SetMagickInfo("DOT");
194 #if defined(MAGICKCORE_GVC_DELEGATE)
195 entry->decoder=(DecodeImageHandler *) ReadDOTImage;
197 entry->blob_support=MagickFalse;
198 entry->description=ConstantString("Graphviz");
199 entry->module=ConstantString("DOT");
200 (void) RegisterMagickInfo(entry);
201 entry=SetMagickInfo("GV");
202 #if defined(MAGICKCORE_GVC_DELEGATE)
203 entry->decoder=(DecodeImageHandler *) ReadDOTImage;
205 entry->blob_support=MagickFalse;
206 entry->description=ConstantString("Graphviz");
207 entry->module=ConstantString("DOT");
208 (void) RegisterMagickInfo(entry);
209 #if defined(MAGICKCORE_GVC_DELEGATE)
210 graphic_context=gvContext();
212 return(MagickImageCoderSignature);
216 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
220 % U n r e g i s t e r D O T I m a g e %
224 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
226 % UnregisterDOTImage() removes format registrations made by the
227 % DOT module from the list of supported formats.
229 % The format of the UnregisterDOTImage method is:
231 % UnregisterDOTImage(void)
234 ModuleExport void UnregisterDOTImage(void)
236 (void) UnregisterMagickInfo("GV");
237 (void) UnregisterMagickInfo("DOT");
238 #if defined(MAGICKCORE_GVC_DELEGATE)
239 gvFreeContext(graphic_context);