1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % M M V V GGGG %
7 % MM MM V V G %
8 % M M M V V G GG %
9 % M M V V G G %
10 % M M V GGG %
11 % %
12 % %
13 % Read/Write Magick Vector Graphics Metafiles. %
14 % %
15 % Software Design %
16 % Cristy %
17 % April 2000 %
18 % %
19 % %
20 % Copyright 1999-2016 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 % http://www.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/artifact.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/draw.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/module.h"
55 #include "MagickCore/property.h"
56 #include "MagickCore/quantum-private.h"
57 #include "MagickCore/static.h"
58 #include "MagickCore/string_.h"
59
60 /*
61 Forward declarations.
62 */
63 static MagickBooleanType
64 WriteMVGImage(const ImageInfo *,Image *,ExceptionInfo *);
65
66 /*
67 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
68 % %
69 % %
70 % %
71 % I s M V G %
72 % %
73 % %
74 % %
75 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
76 %
77 % IsMVG() returns MagickTrue if the image format type, identified by the
78 % magick string, is MVG.
79 %
80 % The format of the IsMVG method is:
81 %
82 % MagickBooleanType IsMVG(const unsigned char *magick,const size_t length)
83 %
84 % A description of each parameter follows:
85 %
86 % o magick: compare image format pattern against these bytes.
87 %
88 % o length: Specifies the length of the magick string.
89 %
90 */
IsMVG(const unsigned char * magick,const size_t length)91 static MagickBooleanType IsMVG(const unsigned char *magick,const size_t length)
92 {
93 if (length < 20)
94 return(MagickFalse);
95 if (LocaleNCompare((const char *) magick,"push graphic-context",20) == 0)
96 return(MagickTrue);
97 return(MagickFalse);
98 }
99
100 /*
101 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
102 % %
103 % %
104 % %
105 % R e a d M V G I m a g e %
106 % %
107 % %
108 % %
109 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
110 %
111 % ReadMVGImage creates a gradient image and initializes it to
112 % the X server color range as specified by the filename. It allocates the
113 % memory necessary for the new Image structure and returns a pointer to the
114 % new image.
115 %
116 % The format of the ReadMVGImage method is:
117 %
118 % Image *ReadMVGImage(const ImageInfo *image_info,ExceptionInfo *exception)
119 %
120 % A description of each parameter follows:
121 %
122 % o image_info: the image info.
123 %
124 % o exception: return any errors or warnings in this structure.
125 %
126 */
ReadMVGImage(const ImageInfo * image_info,ExceptionInfo * exception)127 static Image *ReadMVGImage(const ImageInfo *image_info,ExceptionInfo *exception)
128 {
129 #define BoundingBox "viewbox"
130
131 DrawInfo
132 *draw_info;
133
134 Image
135 *image;
136
137 MagickBooleanType
138 status;
139
140 /*
141 Open image.
142 */
143 assert(image_info != (const ImageInfo *) NULL);
144 assert(image_info->signature == MagickCoreSignature);
145 if (image_info->debug != MagickFalse)
146 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
147 image_info->filename);
148 assert(exception != (ExceptionInfo *) NULL);
149 assert(exception->signature == MagickCoreSignature);
150 image=AcquireImage(image_info,exception);
151 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
152 if (status == MagickFalse)
153 {
154 image=DestroyImageList(image);
155 return((Image *) NULL);
156 }
157 if ((image->columns == 0) || (image->rows == 0))
158 {
159 char
160 primitive[MagickPathExtent];
161
162 register char
163 *p;
164
165 SegmentInfo
166 bounds;
167
168 /*
169 Determine size of image canvas.
170 */
171 while (ReadBlobString(image,primitive) != (char *) NULL)
172 {
173 for (p=primitive; (*p == ' ') || (*p == '\t'); p++) ;
174 if (LocaleNCompare(BoundingBox,p,strlen(BoundingBox)) != 0)
175 continue;
176 (void) sscanf(p,"viewbox %lf %lf %lf %lf",&bounds.x1,&bounds.y1,
177 &bounds.x2,&bounds.y2);
178 image->columns=(size_t) floor((bounds.x2-bounds.x1)+0.5);
179 image->rows=(size_t) floor((bounds.y2-bounds.y1)+0.5);
180 break;
181 }
182 }
183 if ((image->columns == 0) || (image->rows == 0))
184 ThrowReaderException(OptionError,"MustSpecifyImageSize");
185 draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
186 draw_info->affine.sx=image->resolution.x == 0.0 ? 1.0 : image->resolution.x/
187 DefaultResolution;
188 draw_info->affine.sy=image->resolution.y == 0.0 ? 1.0 : image->resolution.y/
189 DefaultResolution;
190 image->columns=(size_t) (draw_info->affine.sx*image->columns);
191 image->rows=(size_t) (draw_info->affine.sy*image->rows);
192 status=SetImageExtent(image,image->columns,image->rows,exception);
193 if (status == MagickFalse)
194 return(DestroyImageList(image));
195 if (SetImageBackgroundColor(image,exception) == MagickFalse)
196 {
197 image=DestroyImageList(image);
198 return((Image *) NULL);
199 }
200 /*
201 Render drawing.
202 */
203 if (GetBlobStreamData(image) == (unsigned char *) NULL)
204 draw_info->primitive=FileToString(image->filename,~0UL,exception);
205 else
206 {
207 draw_info->primitive=(char *) AcquireMagickMemory(GetBlobSize(image)+1);
208 if (draw_info->primitive != (char *) NULL)
209 {
210 CopyMagickMemory(draw_info->primitive,GetBlobStreamData(image),
211 GetBlobSize(image));
212 draw_info->primitive[GetBlobSize(image)]='\0';
213 }
214 }
215 if (draw_info->primitive == (char *) NULL)
216 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
217 (void) DrawImage(image,draw_info,exception);
218 draw_info=DestroyDrawInfo(draw_info);
219 (void) CloseBlob(image);
220 return(GetFirstImageInList(image));
221 }
222
223 /*
224 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
225 % %
226 % %
227 % %
228 % R e g i s t e r M V G I m a g e %
229 % %
230 % %
231 % %
232 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
233 %
234 % RegisterMVGImage() adds properties for the MVG image format
235 % to the list of supported formats. The properties include the image format
236 % tag, a method to read and/or write the format, whether the format
237 % supports the saving of more than one frame to the same file or blob,
238 % whether the format supports native in-memory I/O, and a brief
239 % description of the format.
240 %
241 % The format of the RegisterMVGImage method is:
242 %
243 % size_t RegisterMVGImage(void)
244 %
245 */
RegisterMVGImage(void)246 ModuleExport size_t RegisterMVGImage(void)
247 {
248 MagickInfo
249 *entry;
250
251 entry=AcquireMagickInfo("MVG","MVG","Magick Vector Graphics");
252 entry->decoder=(DecodeImageHandler *) ReadMVGImage;
253 entry->encoder=(EncodeImageHandler *) WriteMVGImage;
254 entry->magick=(IsImageFormatHandler *) IsMVG;
255 entry->format_type=ImplicitFormatType;
256 entry->flags^=CoderAdjoinFlag;
257 entry->flags|=CoderSeekableStreamFlag;
258 (void) RegisterMagickInfo(entry);
259 return(MagickImageCoderSignature);
260 }
261
262 /*
263 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
264 % %
265 % %
266 % %
267 % U n r e g i s t e r M V G I m a g e %
268 % %
269 % %
270 % %
271 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
272 %
273 % UnregisterMVGImage() removes format registrations made by the
274 % MVG module from the list of supported formats.
275 %
276 % The format of the UnregisterMVGImage method is:
277 %
278 % UnregisterMVGImage(void)
279 %
280 */
UnregisterMVGImage(void)281 ModuleExport void UnregisterMVGImage(void)
282 {
283 (void) UnregisterMagickInfo("MVG");
284 }
285
286 /*
287 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
288 % %
289 % %
290 % %
291 % W r i t e M V G I m a g e %
292 % %
293 % %
294 % %
295 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
296 %
297 % WriteMVGImage() writes an image to a file in MVG image format.
298 %
299 % The format of the WriteMVGImage method is:
300 %
301 % MagickBooleanType WriteMVGImage(const ImageInfo *image_info,
302 % Image *image,ExceptionInfo *exception)
303 %
304 % A description of each parameter follows.
305 %
306 % o image_info: the image info.
307 %
308 % o image: The image.
309 %
310 % o exception: return any errors or warnings in this structure.
311 %
312 */
WriteMVGImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)313 static MagickBooleanType WriteMVGImage(const ImageInfo *image_info,Image *image,
314 ExceptionInfo *exception)
315 {
316 const char
317 *value;
318
319 MagickBooleanType
320 status;
321
322 /*
323 Open output image file.
324 */
325 assert(image_info != (const ImageInfo *) NULL);
326 assert(image_info->signature == MagickCoreSignature);
327 assert(image != (Image *) NULL);
328 assert(image->signature == MagickCoreSignature);
329 if (image->debug != MagickFalse)
330 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
331 value=GetImageArtifact(image,"MVG");
332 if (value == (const char *) NULL)
333 ThrowWriterException(OptionError,"NoImageVectorGraphics");
334 status=OpenBlob(image_info,image,WriteBlobMode,exception);
335 if (status == MagickFalse)
336 return(status);
337 (void) WriteBlob(image,strlen(value),(const unsigned char *) value);
338 (void) CloseBlob(image);
339 return(MagickTrue);
340 }
341