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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                                   X   X                                     %
   7 %                                    X X                                      %
   8 %                                     X                                       %
   9 %                                    X X                                      %
  10 %                                   X   X                                     %
  11 %                                                                             %
  12 %                                                                             %
  13 %                    Read/Write Image from/to X11 Server.                     %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2009 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/client.h"
  46 #include "magick/display.h"
  47 #include "magick/exception.h"
  48 #include "magick/exception-private.h"
  49 #include "magick/image.h"
  50 #include "magick/image-private.h"
  51 #include "magick/list.h"
  52 #include "magick/magick.h"
  53 #include "magick/memory_.h"
  54 #include "magick/option.h"
  55 #include "magick/quantum-private.h"
  56 #include "magick/static.h"
  57 #include "magick/string_.h"
  58 #include "magick/module.h"
  59 #include "magick/utility.h"
  60 #include "magick/xwindow.h"
  61 #include "magick/xwindow-private.h"
  62 \f
  63 /*
  64   Forward declarations.
  65 */
  66 #if defined(MAGICKCORE_X11_DELEGATE)
  67 static MagickBooleanType
  68   WriteXImage(const ImageInfo *,Image *);
  69 #endif
  70 \f
  71 #if defined(MAGICKCORE_X11_DELEGATE)
  72 /*
  73 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  74 %                                                                             %
  75 %                                                                             %
  76 %                                                                             %
  77 %   R e a d X I m a g e                                                       %
  78 %                                                                             %
  79 %                                                                             %
  80 %                                                                             %
  81 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  82 %
  83 %  ReadXImage() reads an image from an X window.
  84 %
  85 %  The format of the ReadXImage method is:
  86 %
  87 %      Image *ReadXImage(const ImageInfo *image_info,ExceptionInfo *exception)
  88 %
  89 %  A description of each parameter follows:
  90 %
  91 %    o image_info: the image info.
  92 %
  93 %    o exception: return any errors or warnings in this structure.
  94 %
  95 */
  96 static Image *ReadXImage(const ImageInfo *image_info,ExceptionInfo *exception)
  97 {
  98   const char
  99     *option;
 100
 101   XImportInfo
 102     ximage_info;
 103
 104   (void) exception;
 105   XGetImportInfo(&ximage_info);
 106   option=GetImageOption(image_info,"x:screen");
 107   if (option != (const char *) NULL)
 108     ximage_info.screen=IsMagickTrue(option);
 109   return(XImportImage(image_info,&ximage_info));
 110 }
 111 #endif
 112 \f
 113 /*
 114 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 115 %                                                                             %
 116 %                                                                             %
 117 %                                                                             %
 118 %   R e g i s t e r X I m a g e                                               %
 119 %                                                                             %
 120 %                                                                             %
 121 %                                                                             %
 122 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 123 %
 124 %  RegisterXImage() adds attributes for the X image format to
 125 %  the list of supported formats.  The attributes include the image format
 126 %  tag, a method to read and/or write the format, whether the format
 127 %  supports the saving of more than one frame to the same file or blob,
 128 %  whether the format supports native in-memory I/O, and a brief
 129 %  description of the format.
 130 %
 131 %  The format of the RegisterXImage method is:
 132 %
 133 %      unsigned long RegisterXImage(void)
 134 %
 135 */
 136 ModuleExport unsigned long RegisterXImage(void)
 137 {
 138   MagickInfo
 139     *entry;
 140
 141   entry=SetMagickInfo("X");
 142 #if defined(MAGICKCORE_X11_DELEGATE)
 143   entry->decoder=(DecodeImageHandler *) ReadXImage;
 144   entry->encoder=(EncodeImageHandler *) WriteXImage;
 145 #endif
 146   entry->format_type=ExplicitFormatType;
 147   entry->description=ConstantString("X Image");
 148   entry->module=ConstantString("X");
 149   (void) RegisterMagickInfo(entry);
 150   return(MagickImageCoderSignature);
 151 }
 152 \f
 153 /*
 154 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 155 %                                                                             %
 156 %                                                                             %
 157 %                                                                             %
 158 %   U n r e g i s t e r X I m a g e                                           %
 159 %                                                                             %
 160 %                                                                             %
 161 %                                                                             %
 162 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 163 %
 164 %  UnregisterXImage() removes format registrations made by the
 165 %  X module from the list of supported formats.
 166 %
 167 %  The format of the UnregisterXImage method is:
 168 %
 169 %      UnregisterXImage(void)
 170 %
 171 */
 172 ModuleExport void UnregisterXImage(void)
 173 {
 174   (void) UnregisterMagickInfo("X");
 175 }
 176 \f
 177 /*
 178 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 179 %                                                                             %
 180 %                                                                             %
 181 %                                                                             %
 182 %   W r i t e X I m a g e                                                     %
 183 %                                                                             %
 184 %                                                                             %
 185 %                                                                             %
 186 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 187 %
 188 %  WriteXImage() writes an image to an X server.
 189 %
 190 %  The format of the WriteXImage method is:
 191 %
 192 %      MagickBooleanType WriteXImage(const ImageInfo *image_info,Image *image)
 193 %
 194 %  A description of each parameter follows.
 195 %
 196 %    o image_info: the image info.
 197 %
 198 %    o image:  The image.
 199 %
 200 */
 201 static MagickBooleanType WriteXImage(const ImageInfo *image_info,Image *image)
 202 {
 203   return(DisplayImages(image_info,image));
 204 }