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 /* 41 Include declarations. 42 */ 43 #include "MagickCore/studio.h" 44 #include "MagickCore/artifact.h" 45 #include "MagickCore/blob.h" 46 #include "MagickCore/blob-private.h" 47 #include "MagickCore/draw.h" 48 #include "MagickCore/exception.h" 49 #include "MagickCore/exception-private.h" 50 #include "MagickCore/image.h" 51 #include "MagickCore/image-private.h" 52 #include "MagickCore/list.h" 53 #include "MagickCore/magick.h" 54 #include "MagickCore/memory_.h" 55 #include "MagickCore/module.h" 56 #include "MagickCore/property.h" 57 #include "MagickCore/quantum-private.h" 58 #include "MagickCore/static.h" 59 #include "MagickCore/string_.h" 60 61 /* 63 Forward declarations. 64 */ 65 static MagickBooleanType 66 WriteMVGImage(const ImageInfo *,Image *,ExceptionInfo *); 67 68 /* 70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 71 % % 72 % % 73 % % 74 % I s M V G % 75 % % 76 % % 77 % % 78 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 79 % 80 % IsMVG() returns MagickTrue if the image format type, identified by the 81 % magick string, is MVG. 82 % 83 % The format of the IsMVG method is: 84 % 85 % MagickBooleanType IsMVG(const unsigned char *magick,const size_t length) 86 % 87 % A description of each parameter follows: 88 % 89 % o magick: compare image format pattern against these bytes. 90 % 91 % o length: Specifies the length of the magick string. 92 % 93 */ 94 static MagickBooleanType IsMVG(const unsigned char *magick,const size_t length) 95 { 96 if (length < 20) 97 return(MagickFalse); 98 if (LocaleNCompare((const char *) magick,"push graphic-context",20) == 0) 99 return(MagickTrue); 100 return(MagickFalse); 101 } 102 103 /* 105 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 106 % % 107 % % 108 % % 109 % R e a d M V G I m a g e % 110 % % 111 % % 112 % % 113 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 114 % 115 % ReadMVGImage creates a gradient image and initializes it to 116 % the X server color range as specified by the filename. It allocates the 117 % memory necessary for the new Image structure and returns a pointer to the 118 % new image. 119 % 120 % The format of the ReadMVGImage method is: 121 % 122 % Image *ReadMVGImage(const ImageInfo *image_info,ExceptionInfo *exception) 123 % 124 % A description of each parameter follows: 125 % 126 % o image_info: the image info. 127 % 128 % o exception: return any errors or warnings in this structure. 129 % 130 */ 131 static Image *ReadMVGImage(const ImageInfo *image_info,ExceptionInfo *exception) 132 { 133 #define BoundingBox "viewbox" 134 135 DrawInfo 136 *draw_info; 137 138 Image 139 *image; 140 141 MagickBooleanType 142 status; 143 144 /* 145 Open image. 146 */ 147 assert(image_info != (const ImageInfo *) NULL); 148 assert(image_info->signature == MagickCoreSignature); 149 if (image_info->debug != MagickFalse) 150 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", 151 image_info->filename); 152 assert(exception != (ExceptionInfo *) NULL); 153 assert(exception->signature == MagickCoreSignature); 154 image=AcquireImage(image_info,exception); 155 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); 156 if (status == MagickFalse) 157 { 158 image=DestroyImageList(image); 159 return((Image *) NULL); 160 } 161 if ((image->columns == 0) || (image->rows == 0)) 162 { 163 char 164 primitive[MagickPathExtent]; 165 166 register char 167 *p; 168 169 SegmentInfo 170 bounds; 171 172 /* 173 Determine size of image canvas. 174 */ 175 while (ReadBlobString(image,primitive) != (char *) NULL) 176 { 177 for (p=primitive; (*p == ' ') || (*p == '\t'); p++) ; 178 if (LocaleNCompare(BoundingBox,p,strlen(BoundingBox)) != 0) 179 continue; 180 (void) sscanf(p,"viewbox %lf %lf %lf %lf",&bounds.x1,&bounds.y1, 181 &bounds.x2,&bounds.y2); 182 image->columns=(size_t) floor((bounds.x2-bounds.x1)+0.5); 183 image->rows=(size_t) floor((bounds.y2-bounds.y1)+0.5); 184 break; 185 } 186 } 187 if ((image->columns == 0) || (image->rows == 0)) 188 ThrowReaderException(OptionError,"MustSpecifyImageSize"); 189 draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL); 190 draw_info->affine.sx=image->resolution.x == 0.0 ? 1.0 : image->resolution.x/ 191 DefaultResolution; 192 draw_info->affine.sy=image->resolution.y == 0.0 ? 1.0 : image->resolution.y/ 193 DefaultResolution; 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 return(DestroyImageList(image)); 199 if (SetImageBackgroundColor(image,exception) == MagickFalse) 200 { 201 image=DestroyImageList(image); 202 return((Image *) NULL); 203 } 204 /* 205 Render drawing. 206 */ 207 if (GetBlobStreamData(image) == (unsigned char *) NULL) 208 draw_info->primitive=FileToString(image->filename,~0UL,exception); 209 else 210 { 211 draw_info->primitive=(char *) AcquireMagickMemory(GetBlobSize(image)+1); 212 if (draw_info->primitive != (char *) NULL) 213 { 214 CopyMagickMemory(draw_info->primitive,GetBlobStreamData(image), 215 GetBlobSize(image)); 216 draw_info->primitive[GetBlobSize(image)]='\0'; 217 } 218 } 219 if (draw_info->primitive == (char *) NULL) 220 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 221 (void) DrawImage(image,draw_info,exception); 222 draw_info=DestroyDrawInfo(draw_info); 223 (void) CloseBlob(image); 224 return(GetFirstImageInList(image)); 225 } 226 227 /* 229 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 230 % % 231 % % 232 % % 233 % R e g i s t e r M V G I m a g e % 234 % % 235 % % 236 % % 237 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 238 % 239 % RegisterMVGImage() adds properties for the MVG image format 240 % to the list of supported formats. The properties include the image format 241 % tag, a method to read and/or write the format, whether the format 242 % supports the saving of more than one frame to the same file or blob, 243 % whether the format supports native in-memory I/O, and a brief 244 % description of the format. 245 % 246 % The format of the RegisterMVGImage method is: 247 % 248 % size_t RegisterMVGImage(void) 249 % 250 */ 251 ModuleExport size_t RegisterMVGImage(void) 252 { 253 MagickInfo 254 *entry; 255 256 entry=AcquireMagickInfo("MVG","MVG","Magick Vector Graphics"); 257 entry->decoder=(DecodeImageHandler *) ReadMVGImage; 258 entry->encoder=(EncodeImageHandler *) WriteMVGImage; 259 entry->magick=(IsImageFormatHandler *) IsMVG; 260 entry->format_type=ImplicitFormatType; 261 entry->flags^=CoderAdjoinFlag; 262 entry->flags|=CoderSeekableStreamFlag; 263 (void) RegisterMagickInfo(entry); 264 return(MagickImageCoderSignature); 265 } 266 267 /* 269 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 270 % % 271 % % 272 % % 273 % U n r e g i s t e r M V G I m a g e % 274 % % 275 % % 276 % % 277 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 278 % 279 % UnregisterMVGImage() removes format registrations made by the 280 % MVG module from the list of supported formats. 281 % 282 % The format of the UnregisterMVGImage method is: 283 % 284 % UnregisterMVGImage(void) 285 % 286 */ 287 ModuleExport void UnregisterMVGImage(void) 288 { 289 (void) UnregisterMagickInfo("MVG"); 290 } 291 292 /* 294 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 295 % % 296 % % 297 % % 298 % W r i t e M V G I m a g e % 299 % % 300 % % 301 % % 302 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 303 % 304 % WriteMVGImage() writes an image to a file in MVG image format. 305 % 306 % The format of the WriteMVGImage method is: 307 % 308 % MagickBooleanType WriteMVGImage(const ImageInfo *image_info, 309 % Image *image,ExceptionInfo *exception) 310 % 311 % A description of each parameter follows. 312 % 313 % o image_info: the image info. 314 % 315 % o image: The image. 316 % 317 % o exception: return any errors or warnings in this structure. 318 % 319 */ 320 static MagickBooleanType WriteMVGImage(const ImageInfo *image_info,Image *image, 321 ExceptionInfo *exception) 322 { 323 const char 324 *value; 325 326 MagickBooleanType 327 status; 328 329 /* 330 Open output image file. 331 */ 332 assert(image_info != (const ImageInfo *) NULL); 333 assert(image_info->signature == MagickCoreSignature); 334 assert(image != (Image *) NULL); 335 assert(image->signature == MagickCoreSignature); 336 if (image->debug != MagickFalse) 337 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); 338 value=GetImageArtifact(image,"MVG"); 339 if (value == (const char *) NULL) 340 ThrowWriterException(OptionError,"NoImageVectorGraphics"); 341 status=OpenBlob(image_info,image,WriteBlobMode,exception); 342 if (status == MagickFalse) 343 return(status); 344 (void) WriteBlob(image,strlen(value),(const unsigned char *) value); 345 (void) CloseBlob(image); 346 return(MagickTrue); 347 } 348
