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 1999-2019 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/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 DrawInfo
130 *draw_info;
131
132 Image
133 *image;
134
135 MagickBooleanType
136 status;
137
138 /*
139 Open image.
140 */
141 assert(image_info != (const ImageInfo *) NULL);
142 assert(image_info->signature == MagickCoreSignature);
143 if (image_info->debug != MagickFalse)
144 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
145 image_info->filename);
146 assert(exception != (ExceptionInfo *) NULL);
147 assert(exception->signature == MagickCoreSignature);
148 image=AcquireImage(image_info,exception);
149 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
150 if (status == MagickFalse)
151 {
152 image=DestroyImageList(image);
153 return((Image *) NULL);
154 }
155 if ((image->columns == 0) || (image->rows == 0))
156 {
157 char
158 primitive[MagickPathExtent];
159
160 register char
161 *p;
162
163 SegmentInfo
164 bounds;
165
166 /*
167 Determine size of image canvas.
168 */
169 (void) memset(&bounds,0,sizeof(bounds));
170 while (ReadBlobString(image,primitive) != (char *) NULL)
171 {
172 int
173 count;
174
175 for (p=primitive; (*p == ' ') || (*p == '\t'); p++) ;
176 count=sscanf(p,"viewbox %lf %lf %lf %lf",&bounds.x1,&bounds.y1,
177 &bounds.x2,&bounds.y2);
178 if (count != 4)
179 continue;
180 image->columns=(size_t) floor((bounds.x2-bounds.x1)+0.5);
181 image->rows=(size_t) floor((bounds.y2-bounds.y1)+0.5);
182 break;
183 }
184 }
185 if ((image->columns == 0) || (image->rows == 0))
186 ThrowReaderException(OptionError,"MustSpecifyImageSize");
187 draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
188 if (draw_info->density != (char *) NULL)
189 draw_info->density=DestroyString(draw_info->density);
190 draw_info->affine.sx=image->resolution.x == 0.0 ? 1.0 : image->resolution.x/
191 96.0;
192 draw_info->affine.sy=image->resolution.y == 0.0 ? 1.0 : image->resolution.y/
193 96.0;
194 image->columns=(size_t) (draw_info->affine.sx*image->columns);
195 image->rows=(size_t) (draw_info->affine.sy*image->rows);
196 status=SetImageExtent(image,image->columns,image->rows,exception);
197 if (status == MagickFalse)
198 {
199 draw_info=DestroyDrawInfo(draw_info);
200 return(DestroyImageList(image));
201 }
202 if (SetImageBackgroundColor(image,exception) == MagickFalse)
203 {
204 draw_info=DestroyDrawInfo(draw_info);
205 return(DestroyImageList(image));
206 }
207 /*
208 Render drawing.
209 */
210 if (GetBlobStreamData(image) == (unsigned char *) NULL)
211 draw_info->primitive=FileToString(image->filename,~0UL,exception);
212 else
213 {
214 MagickSizeType
215 length;
216
217 length=GetBlobSize(image);
218 if (length == (MagickSizeType) ((size_t) length))
219 {
220 draw_info->primitive=(char *) AcquireMagickMemory((size_t) length+1);
221 if (draw_info->primitive != (char *) NULL)
222 {
223 memcpy(draw_info->primitive,GetBlobStreamData(image),(size_t)
224 length);
225 draw_info->primitive[length]='\0';
226 }
227 }
228 }
229 if (draw_info->primitive == (char *) NULL)
230 {
231 draw_info=DestroyDrawInfo(draw_info);
232 return(DestroyImageList(image));
233 }
234 if (*draw_info->primitive == '@')
235 {
236 draw_info=DestroyDrawInfo(draw_info);
237 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
238 }
239 (void) DrawImage(image,draw_info,exception);
240 (void) SetImageArtifact(image,"mvg:vector-graphics",draw_info->primitive);
241 draw_info=DestroyDrawInfo(draw_info);
242 (void) CloseBlob(image);
243 return(GetFirstImageInList(image));
244 }
245
246 /*
247 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
248 % %
249 % %
250 % %
251 % R e g i s t e r M V G I m a g e %
252 % %
253 % %
254 % %
255 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
256 %
257 % RegisterMVGImage() adds properties for the MVG image format
258 % to the list of supported formats. The properties include the image format
259 % tag, a method to read and/or write the format, whether the format
260 % supports the saving of more than one frame to the same file or blob,
261 % whether the format supports native in-memory I/O, and a brief
262 % description of the format.
263 %
264 % The format of the RegisterMVGImage method is:
265 %
266 % size_t RegisterMVGImage(void)
267 %
268 */
RegisterMVGImage(void)269 ModuleExport size_t RegisterMVGImage(void)
270 {
271 MagickInfo
272 *entry;
273
274 entry=AcquireMagickInfo("MVG","MVG","Magick Vector Graphics");
275 entry->decoder=(DecodeImageHandler *) ReadMVGImage;
276 entry->encoder=(EncodeImageHandler *) WriteMVGImage;
277 entry->magick=(IsImageFormatHandler *) IsMVG;
278 entry->format_type=ImplicitFormatType;
279 entry->flags^=CoderAdjoinFlag;
280 (void) RegisterMagickInfo(entry);
281 return(MagickImageCoderSignature);
282 }
283
284 /*
285 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
286 % %
287 % %
288 % %
289 % U n r e g i s t e r M V G I m a g e %
290 % %
291 % %
292 % %
293 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
294 %
295 % UnregisterMVGImage() removes format registrations made by the
296 % MVG module from the list of supported formats.
297 %
298 % The format of the UnregisterMVGImage method is:
299 %
300 % UnregisterMVGImage(void)
301 %
302 */
UnregisterMVGImage(void)303 ModuleExport void UnregisterMVGImage(void)
304 {
305 (void) UnregisterMagickInfo("MVG");
306 }
307
308 /*
309 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
310 % %
311 % %
312 % %
313 % W r i t e M V G I m a g e %
314 % %
315 % %
316 % %
317 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
318 %
319 % WriteMVGImage() writes an image to a file in MVG image format.
320 %
321 % The format of the WriteMVGImage method is:
322 %
323 % MagickBooleanType WriteMVGImage(const ImageInfo *image_info,
324 % Image *image,ExceptionInfo *exception)
325 %
326 % A description of each parameter follows.
327 %
328 % o image_info: the image info.
329 %
330 % o image: The image.
331 %
332 % o exception: return any errors or warnings in this structure.
333 %
334 */
WriteMVGImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)335 static MagickBooleanType WriteMVGImage(const ImageInfo *image_info,Image *image,
336 ExceptionInfo *exception)
337 {
338 const char
339 *value;
340
341 MagickBooleanType
342 status;
343
344 /*
345 Open output image file.
346 */
347 assert(image_info != (const ImageInfo *) NULL);
348 assert(image_info->signature == MagickCoreSignature);
349 assert(image != (Image *) NULL);
350 assert(image->signature == MagickCoreSignature);
351 if (image->debug != MagickFalse)
352 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
353 value=GetImageArtifact(image,"mvg:vector-graphics");
354 if (value == (const char *) NULL)
355 ThrowWriterException(OptionError,"NoImageVectorGraphics");
356 status=OpenBlob(image_info,image,WriteBlobMode,exception);
357 if (status == MagickFalse)
358 return(status);
359 (void) WriteBlob(image,strlen(value),(const unsigned char *) value);
360 (void) CloseBlob(image);
361 return(MagickTrue);
362 }
363