1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % DDDD OOO TTTTT %
7 % D D O O T %
8 % D D O O T %
9 % D D O O T %
10 % DDDD OOO T %
11 % %
12 % %
13 % Read/Write Graphviz DOT Format %
14 % %
15 % Software Design %
16 % Cristy %
17 % July 1992 %
18 % %
19 % %
20 % Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
22 % %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
25 % %
26 % https://imagemagick.org/script/license.php %
27 % %
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. %
33 % %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 %
36 %
37 */
38
39 /*
40 Include declarations.
41 */
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)
65 #undef HAVE_CONFIG_H
66 #include <gvc.h>
67 static GVC_t
68 *graphic_context = (GVC_t *) NULL;
69 #endif
70
71 #if defined(MAGICKCORE_GVC_DELEGATE)
72 /*
73 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
74 % %
75 % %
76 % %
77 % R e a d D O T I m a g e %
78 % %
79 % %
80 % %
81 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
82 %
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
85 % the new image.
86 %
87 % The format of the ReadDOTImage method is:
88 %
89 % Image *ReadDOTImage(const ImageInfo *image_info,ExceptionInfo *exception)
90 %
91 % A description of each parameter follows:
92 %
93 % o image_info: the image info.
94 %
95 % o exception: return any errors or warnings in this structure.
96 %
97 */
ReadDOTImage(const ImageInfo * image_info,ExceptionInfo * exception)98 static Image *ReadDOTImage(const ImageInfo *image_info,ExceptionInfo *exception)
99 {
100 char
101 command[MagickPathExtent];
102
103 const char
104 *option;
105
106 graph_t
107 *graph;
108
109 Image
110 *image;
111
112 ImageInfo
113 *read_info;
114
115 MagickBooleanType
116 status;
117
118 /*
119 Open image file.
120 */
121 assert(image_info != (const ImageInfo *) NULL);
122 assert(image_info->signature == MagickCoreSignature);
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 == MagickCoreSignature);
128 assert(graphic_context != (GVC_t *) NULL);
129 image=AcquireImage(image_info,exception);
130 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
131 if (status == MagickFalse)
132 return((Image *) NULL);
133 read_info=CloneImageInfo(image_info);
134 SetImageInfoBlob(read_info,(void *) NULL,0);
135 (void) CopyMagickString(read_info->magick,"SVG",MagickPathExtent);
136 (void) AcquireUniqueFilename(read_info->filename);
137 (void) FormatLocaleString(command,MagickPathExtent,"-Tsvg -o%s %s",
138 read_info->filename,image_info->filename);
139 #if !defined(WITH_CGRAPH)
140 graph=agread(GetBlobFileHandle(image));
141 #else
142 graph=agread(GetBlobFileHandle(image),(Agdisc_t *) NULL);
143 #endif
144 if (graph == (graph_t *) NULL)
145 {
146 (void) RelinquishUniqueFileResource(read_info->filename);
147 return ((Image *) NULL);
148 }
149 option=GetImageOption(image_info,"dot:layout-engine");
150 if (option == (const char *) NULL)
151 gvLayout(graphic_context,graph,(char *) "dot");
152 else
153 gvLayout(graphic_context,graph,(char *) option);
154 gvRenderFilename(graphic_context,graph,(char *) "svg",read_info->filename);
155 gvFreeLayout(graphic_context,graph);
156 agclose(graph);
157 /*
158 Read SVG graph.
159 */
160 (void) CopyMagickString(read_info->magick,"SVG",MaxTextExtent);
161 image=ReadImage(read_info,exception);
162 (void) RelinquishUniqueFileResource(read_info->filename);
163 read_info=DestroyImageInfo(read_info);
164 if (image == (Image *) NULL)
165 return((Image *) NULL);
166 return(GetFirstImageInList(image));
167 }
168 #endif
169
170 /*
171 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
172 % %
173 % %
174 % %
175 % R e g i s t e r D O T I m a g e %
176 % %
177 % %
178 % %
179 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
180 %
181 % RegisterDOTImage() adds attributes for the Display Postscript image
182 % format to the list of supported formats. The attributes include the image
183 % format tag, a method to read and/or write the format, whether the format
184 % supports the saving of more than one frame to the same file or blob,
185 % whether the format supports native in-memory I/O, and a brief
186 % description of the format.
187 %
188 % The format of the RegisterDOTImage method is:
189 %
190 % size_t RegisterDOTImage(void)
191 %
192 */
RegisterDOTImage(void)193 ModuleExport size_t RegisterDOTImage(void)
194 {
195 MagickInfo
196 *entry;
197
198 entry=AcquireMagickInfo("DOT","DOT","Graphviz");
199 #if defined(MAGICKCORE_GVC_DELEGATE)
200 entry->decoder=(DecodeImageHandler *) ReadDOTImage;
201 #endif
202 entry->flags^=CoderBlobSupportFlag;
203 (void) RegisterMagickInfo(entry);
204 entry=AcquireMagickInfo("DOT","GV","Graphviz");
205 #if defined(MAGICKCORE_GVC_DELEGATE)
206 entry->decoder=(DecodeImageHandler *) ReadDOTImage;
207 #endif
208 entry->flags^=CoderBlobSupportFlag;
209 (void) RegisterMagickInfo(entry);
210 #if defined(MAGICKCORE_GVC_DELEGATE)
211 graphic_context=gvContext();
212 #endif
213 return(MagickImageCoderSignature);
214 }
215
216 /*
217 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
218 % %
219 % %
220 % %
221 % U n r e g i s t e r D O T I m a g e %
222 % %
223 % %
224 % %
225 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
226 %
227 % UnregisterDOTImage() removes format registrations made by the
228 % DOT module from the list of supported formats.
229 %
230 % The format of the UnregisterDOTImage method is:
231 %
232 % UnregisterDOTImage(void)
233 %
234 */
UnregisterDOTImage(void)235 ModuleExport void UnregisterDOTImage(void)
236 {
237 (void) UnregisterMagickInfo("GV");
238 (void) UnregisterMagickInfo("DOT");
239 #if defined(MAGICKCORE_GVC_DELEGATE)
240 if (graphic_context != (GVC_t *) NULL)
241 {
242 gvFreeContext(graphic_context);
243 graphic_context=(GVC_t *) NULL;
244 }
245 #endif
246 }
247