/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % M M V V GGGG % % MM MM V V G % % M M M V V G GG % % M M V V G G % % M M V GGG % % % % % % Read/Write Magick Vector Graphics Metafiles. % % % % Software Design % % John Cristy % % April 2000 % % % % % % Copyright 1999-2007 ImageMagick Studio LLC, a non-profit organization % % dedicated to making software imaging solutions freely available. % % % % You may not use this file except in compliance with the License. You may % % obtain a copy of the License at % % % % http://www.imagemagick.org/script/license.php % % % % Unless required by applicable law or agreed to in writing, software % % distributed under the License is distributed on an "AS IS" BASIS, % % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % % See the License for the specific language governing permissions and % % limitations under the License. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % */ /* Include declarations. */ #include "magick/studio.h" #include "magick/artifact.h" #include "magick/blob.h" #include "magick/blob-private.h" #include "magick/draw.h" #include "magick/exception.h" #include "magick/exception-private.h" #include "magick/image.h" #include "magick/image-private.h" #include "magick/list.h" #include "magick/magick.h" #include "magick/memory_.h" #include "magick/module.h" #include "magick/property.h" #include "magick/quantum-private.h" #include "magick/static.h" #include "magick/string_.h" /* Forward declarations. */ static MagickBooleanType WriteMVGImage(const ImageInfo *,Image *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % I s M V G % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % IsMVG() returns MagickTrue if the image format type, identified by the % magick string, is MVG. % % The format of the IsMVG method is: % % MagickBooleanType IsMVG(const unsigned char *magick,const size_t length) % % A description of each parameter follows: % % o magick: This string is generally the first few bytes of an image file % or blob. % % o length: Specifies the length of the magick string. % % */ static MagickBooleanType IsMVG(const unsigned char *magick,const size_t length) { if (length < 20) return(MagickFalse); if (LocaleNCompare((char *) magick,"push graphic-context",20) == 0) return(MagickTrue); return(MagickFalse); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d M V G I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadMVGImage creates a gradient image and initializes it to % the X server color range as specified by the filename. It allocates the % memory necessary for the new Image structure and returns a pointer to the % new image. % % The format of the ReadMVGImage method is: % % Image *ReadMVGImage(const ImageInfo *image_info,ExceptionInfo *exception) % % A description of each parameter follows: % % o image_info: The image info. % % o exception: return any errors or warnings in this structure. % */ static Image *ReadMVGImage(const ImageInfo *image_info,ExceptionInfo *exception) { #define BoundingBox "viewbox" DrawInfo *draw_info; Image *image; MagickBooleanType status; unsigned char *primitive; /* Open image. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); image=AllocateImage(image_info); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } if ((image->columns == 0) || (image->rows == 0)) { char primitive[MaxTextExtent]; register char *p; SegmentInfo bounds; /* Determine size of image canvas. */ while (ReadBlobString(image,primitive) != (char *) NULL) { for (p=primitive; (*p == ' ') || (*p == '\t'); p++); if (LocaleNCompare(BoundingBox,p,strlen(BoundingBox)) != 0) continue; (void) sscanf(p,"viewbox %lf %lf %lf %lf",&bounds.x1,&bounds.y1, &bounds.x2,&bounds.y2); image->columns=(unsigned long) ((bounds.x2-bounds.x1)+0.5); image->rows=(unsigned long) ((bounds.y2-bounds.y1)+0.5); break; } } if ((image->columns == 0) || (image->rows == 0)) ThrowReaderException(OptionError,"MustSpecifyImageSize"); draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL); draw_info->affine.sx=image->x_resolution == 0.0 ? 1.0 : image->x_resolution/ DefaultResolution; draw_info->affine.sy=image->y_resolution == 0.0 ? 1.0 : image->y_resolution/ DefaultResolution; image->columns=(unsigned long) (draw_info->affine.sx*image->columns); image->rows=(unsigned long) (draw_info->affine.sy*image->rows); if (SetImageExtent(image,0,0) == MagickFalse) { InheritException(exception,&image->exception); return(DestroyImageList(image)); } (void) SetImageBackgroundColor(image); /* Render drawing. */ primitive=GetBlobStreamData(image); if (primitive != (unsigned char *) NULL) draw_info->primitive=AcquireString((char *) primitive); else draw_info->primitive=FileToString(image->filename,~0UL,exception); if (draw_info->primitive == (char *) NULL) return((Image *) NULL); (void) DrawImage(image,draw_info); draw_info=DestroyDrawInfo(draw_info); CloseBlob(image); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r M V G I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterMVGImage() adds properties for the MVG image format % to the list of supported formats. The properties include the image format % tag, a method to read and/or write the format, whether the format % supports the saving of more than one frame to the same file or blob, % whether the format supports native in-memory I/O, and a brief % description of the format. % % The format of the RegisterMVGImage method is: % % unsigned long RegisterMVGImage(void) % */ ModuleExport unsigned long RegisterMVGImage(void) { MagickInfo *entry; entry=SetMagickInfo("MVG"); entry->decoder=(DecodeImageHandler *) ReadMVGImage; entry->encoder=(EncodeImageHandler *) WriteMVGImage; entry->magick=(IsImageFormatHandler *) IsMVG; entry->adjoin=MagickFalse; entry->seekable_stream=MagickTrue; entry->description=ConstantString("Magick Vector Graphics"); entry->module=ConstantString("MVG"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r M V G I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterMVGImage() removes format registrations made by the % MVG module from the list of supported formats. % % The format of the UnregisterMVGImage method is: % % UnregisterMVGImage(void) % */ ModuleExport void UnregisterMVGImage(void) { (void) UnregisterMagickInfo("MVG"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e M V G I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteMVGImage() writes an image to a file in MVG image format. % % The format of the WriteMVGImage method is: % % MagickBooleanType WriteMVGImage(const ImageInfo *image_info,Image *image) % % A description of each parameter follows. % % o image_info: The image info. % % o image: The image. % */ static MagickBooleanType WriteMVGImage(const ImageInfo *image_info,Image *image) { const char *value; MagickBooleanType status; /* Open output image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); assert(image != (Image *) NULL); assert(image->signature == MagickSignature); if (image->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); value=GetImageArtifact(image,"MVG"); if (value == (const char *) NULL) ThrowWriterException(OptionError,"NoImageVectorGraphics"); status=OpenBlob(image_info,image,WriteBlobMode,&image->exception); if (status == MagickFalse) return(status); (void) WriteBlob(image,strlen(value),(unsigned char *) value); CloseBlob(image); return(MagickTrue); }