granicus.if.org Git - imagemagick/blob - coders/mpr.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            M   M  PPPP   RRRR                               %
   7 %                            MM MM  P   P  R   R                              %
   8 %                            M M M  PPPP   RRRR                               %
   9 %                            M   M  P      R R                                %
  10 %                            M   M  P      R  R                               %
  11 %                                                                             %
  12 %                                                                             %
  13 %                  Read/Write the Magick Persistent Registry.                 %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2010 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 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "magick/studio.h"
  43 #include "magick/blob.h"
  44 #include "magick/blob-private.h"
  45 #include "magick/exception.h"
  46 #include "magick/exception-private.h"
  47 #include "magick/magick.h"
  48 #include "magick/memory_.h"
  49 #include "magick/registry.h"
  50 #include "magick/quantum-private.h"
  51 #include "magick/static.h"
  52 #include "magick/string_.h"
  53 #include "magick/module.h"
  54 \f
  55 /*
  56   Forward declarations.
  57 */
  58 static MagickBooleanType
  59   WriteMPRImage(const ImageInfo *,Image *);
  60 \f
  61 /*
  62 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  63 %                                                                             %
  64 %                                                                             %
  65 %                                                                             %
  66 %   R e a d M P R I m a g e                                                   %
  67 %                                                                             %
  68 %                                                                             %
  69 %                                                                             %
  70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  71 %
  72 %  ReadMPRImage() reads a Magick Persistent Registry image as a blob from
  73 %  memory.  It allocates the memory necessary for the new Image structure and
  74 %  returns a pointer to the new image.
  75 %
  76 %  The format of the ReadMPRImage method is:
  77 %
  78 %      Image *ReadMPRImage(const ImageInfo *image_info,
  79 %        ExceptionInfo *exception)
  80 %
  81 %  A description of each parameter follows:
  82 %
  83 %    o image_info: the image info.
  84 %
  85 %    o exception: return any errors or warnings in this structure.
  86 %
  87 */
  88 static Image *ReadMPRImage(const ImageInfo *image_info,ExceptionInfo *exception)
  89 {
  90   Image
  91     *image;
  92
  93   assert(image_info != (const ImageInfo *) NULL);
  94   assert(image_info->signature == MagickSignature);
  95   if (image_info->debug != MagickFalse)
  96     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
  97       image_info->filename);
  98   assert(exception != (ExceptionInfo *) NULL);
  99   assert(exception->signature == MagickSignature);
 100   image=(Image *) GetImageRegistry(ImageRegistryType,image_info->filename,
 101     exception);
 102   if (image != (Image *) NULL)
 103     (void) SyncImageSettings(image_info,image);
 104   return(image);
 105 }
 106 \f
 107 /*
 108 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 109 %                                                                             %
 110 %                                                                             %
 111 %                                                                             %
 112 %   R e g i s t e r M P R I m a g e                                           %
 113 %                                                                             %
 114 %                                                                             %
 115 %                                                                             %
 116 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 117 %
 118 %  RegisterMPRImage() adds attributes for the MPR image format to
 119 %  the list of supported formats.  The attributes include the image format
 120 %  tag, a method to read and/or write the format, whether the format
 121 %  supports the saving of more than one frame to the same file or blob,
 122 %  whether the format supports native in-memory I/O, and a brief
 123 %  description of the format.
 124 %
 125 %  The format of the RegisterMPRImage method is:
 126 %
 127 %      size_t RegisterMPRImage(void)
 128 %
 129 */
 130 ModuleExport size_t RegisterMPRImage(void)
 131 {
 132   MagickInfo
 133     *entry;
 134
 135   entry=SetMagickInfo("MPR");
 136   entry->decoder=(DecodeImageHandler *) ReadMPRImage;
 137   entry->encoder=(EncodeImageHandler *) WriteMPRImage;
 138   entry->adjoin=MagickFalse;
 139   entry->stealth=MagickTrue;
 140   entry->description=ConstantString("Magick Persistent Registry");
 141   entry->module=ConstantString("MPR");
 142   (void) RegisterMagickInfo(entry);
 143   entry=SetMagickInfo("MPRI");
 144   entry->decoder=(DecodeImageHandler *) ReadMPRImage;
 145   entry->encoder=(EncodeImageHandler *) WriteMPRImage;
 146   entry->stealth=MagickTrue;
 147   entry->adjoin=MagickFalse;
 148   entry->stealth=MagickTrue;
 149   entry->description=ConstantString("Magick Persistent Registry");
 150   entry->module=ConstantString("MPRI");
 151   (void) RegisterMagickInfo(entry);
 152   return(MagickImageCoderSignature);
 153 }
 154 \f
 155 /*
 156 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 157 %                                                                             %
 158 %                                                                             %
 159 %                                                                             %
 160 %   U n r e g i s t e r M P R I m a g e                                       %
 161 %                                                                             %
 162 %                                                                             %
 163 %                                                                             %
 164 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 165 %
 166 %  UnregisterMPRImage() removes format registrations made by the
 167 %  MPR module from the list of supported formats.
 168 %
 169 %  The format of the UnregisterMPRImage method is:
 170 %
 171 %      UnregisterMPRImage(void)
 172 %
 173 */
 174 ModuleExport void UnregisterMPRImage(void)
 175 {
 176   (void) UnregisterMagickInfo("MPRI");
 177   (void) UnregisterMagickInfo("MPR");
 178 }
 179 \f
 180 /*
 181 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 182 %                                                                             %
 183 %                                                                             %
 184 %                                                                             %
 185 %   W r i t e M P R I m a g e                                                 %
 186 %                                                                             %
 187 %                                                                             %
 188 %                                                                             %
 189 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 190 %
 191 %  WriteMPRImage() writes an image into the Magick Persistent Registry
 192 %  image as a blob from memory.  It allocates the memory necessary for the
 193 %  new Image structure and returns a pointer to the new image.
 194 %
 195 %  The format of the WriteMPRImage method is:
 196 %
 197 %      MagickBooleanType WriteMPRImage(const ImageInfo *image_info,Image *image)
 198 %
 199 %  A description of each parameter follows.
 200 %
 201 %    o image_info: the image info.
 202 %
 203 %    o image:  The image.
 204 %
 205 */
 206 static MagickBooleanType WriteMPRImage(const ImageInfo *image_info,Image *image)
 207 {
 208   MagickBooleanType
 209     status;
 210
 211   assert(image_info != (const ImageInfo *) NULL);
 212   assert(image_info->signature == MagickSignature);
 213   assert(image != (Image *) NULL);
 214   assert(image->signature == MagickSignature);
 215   if (image->debug != MagickFalse)
 216     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 217   status=SetImageRegistry(ImageRegistryType,image->filename,image,
 218     &image->exception);
 219   return(status);
 220 }