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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                               X   X   CCCC                                  %
   7 %                                X X   C                                      %
   8 %                                 X    C                                      %
   9 %                                X X   C                                      %
  10 %                               X   X   CCCC                                  %
  11 %                                                                             %
  12 %                                                                             %
  13 %                        Read Constant Color Image.                           %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2014 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 "MagickCore/studio.h"
  43 #include "MagickCore/blob.h"
  44 #include "MagickCore/blob-private.h"
  45 #include "MagickCore/cache.h"
  46 #include "MagickCore/color.h"
  47 #include "MagickCore/color-private.h"
  48 #include "MagickCore/colorspace-private.h"
  49 #include "MagickCore/exception.h"
  50 #include "MagickCore/exception-private.h"
  51 #include "MagickCore/image.h"
  52 #include "MagickCore/image-private.h"
  53 #include "MagickCore/list.h"
  54 #include "MagickCore/magick.h"
  55 #include "MagickCore/memory_.h"
  56 #include "MagickCore/pixel.h"
  57 #include "MagickCore/pixel-accessor.h"
  58 #include "MagickCore/quantum-private.h"
  59 #include "MagickCore/static.h"
  60 #include "MagickCore/string_.h"
  61 #include "MagickCore/module.h"
  62 \f
  63 /*
  64 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  65 %                                                                             %
  66 %                                                                             %
  67 %                                                                             %
  68 %   R e a d X C I m a g e                                                     %
  69 %                                                                             %
  70 %                                                                             %
  71 %                                                                             %
  72 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  73 %
  74 %  ReadXCImage creates a constant image and initializes it to the
  75 %  X server color as specified by the filename.  It allocates the memory
  76 %  necessary for the new Image structure and returns a pointer to the new
  77 %  image.
  78 %
  79 %  The format of the ReadXCImage method is:
  80 %
  81 %      Image *ReadXCImage(const ImageInfo *image_info,ExceptionInfo *exception)
  82 %
  83 %  A description of each parameter follows:
  84 %
  85 %    o image:  The image.
  86 %
  87 %    o image_info: the image info.
  88 %
  89 %    o exception: return any errors or warnings in this structure.
  90 %
  91 */
  92 static Image *ReadXCImage(const ImageInfo *image_info,ExceptionInfo *exception)
  93 {
  94   Image
  95     *image;
  96
  97   MagickBooleanType
  98     status;
  99
 100   PixelInfo
 101     pixel;
 102
 103   register ssize_t
 104     x;
 105
 106   register Quantum
 107     *q;
 108
 109   ssize_t
 110     y;
 111
 112   /*
 113     Initialize Image structure.
 114   */
 115   assert(image_info != (const ImageInfo *) NULL);
 116   assert(image_info->signature == MagickSignature);
 117   if (image_info->debug != MagickFalse)
 118     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 119       image_info->filename);
 120   assert(exception != (ExceptionInfo *) NULL);
 121   assert(exception->signature == MagickSignature);
 122   image=AcquireImage(image_info,exception);
 123   if (image->columns == 0)
 124     image->columns=1;
 125   if (image->rows == 0)
 126     image->rows=1;
 127   (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
 128   if (*image_info->filename == '\0')
 129     pixel=image->background_color;
 130   else
 131     {
 132       status=QueryColorCompliance((char *) image_info->filename,AllCompliance,
 133         &pixel,exception);
 134       if (status == MagickFalse)
 135         {
 136           image=DestroyImage(image);
 137           return((Image *) NULL);
 138         }
 139     }
 140   (void) SetImageColorspace(image,pixel.colorspace,exception);
 141   image->alpha_trait=pixel.alpha_trait;
 142   for (y=0; y < (ssize_t) image->rows; y++)
 143   {
 144     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 145     if (q == (Quantum *) NULL)
 146       break;
 147     for (x=0; x < (ssize_t) image->columns; x++)
 148     {
 149       SetPixelInfoPixel(image,&pixel,q);
 150       q+=GetPixelChannels(image);
 151     }
 152     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 153       break;
 154   }
 155   return(GetFirstImageInList(image));
 156 }
 157 \f
 158 /*
 159 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 160 %                                                                             %
 161 %                                                                             %
 162 %                                                                             %
 163 %   R e g i s t e r X C I m a g e                                             %
 164 %                                                                             %
 165 %                                                                             %
 166 %                                                                             %
 167 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 168 %
 169 %  RegisterXCImage() adds attributes for the XC image format to
 170 %  the list of supported formats.  The attributes include the image format
 171 %  tag, a method to read and/or write the format, whether the format
 172 %  supports the saving of more than one frame to the same file or blob,
 173 %  whether the format supports native in-memory I/O, and a brief
 174 %  description of the format.
 175 %
 176 %  The format of the RegisterXCImage method is:
 177 %
 178 %      size_t RegisterXCImage(void)
 179 %
 180 */
 181 ModuleExport size_t RegisterXCImage(void)
 182 {
 183   MagickInfo
 184     *entry;
 185
 186   entry=SetMagickInfo("XC");
 187   entry->decoder=(DecodeImageHandler *) ReadXCImage;
 188   entry->adjoin=MagickFalse;
 189   entry->format_type=ImplicitFormatType;
 190   entry->raw=MagickTrue;
 191   entry->endian_support=MagickTrue;
 192   entry->description=ConstantString("Constant image uniform color");
 193   entry->module=ConstantString("XC");
 194   (void) RegisterMagickInfo(entry);
 195   entry=SetMagickInfo("CANVAS");
 196   entry->decoder=(DecodeImageHandler *) ReadXCImage;
 197   entry->adjoin=MagickFalse;
 198   entry->format_type=ImplicitFormatType;
 199   entry->raw=MagickTrue;
 200   entry->endian_support=MagickTrue;
 201   entry->description=ConstantString("Constant image uniform color");
 202   entry->module=ConstantString("XC");
 203   (void) RegisterMagickInfo(entry);
 204   return(MagickImageCoderSignature);
 205 }
 206 \f
 207 /*
 208 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 209 %                                                                             %
 210 %                                                                             %
 211 %                                                                             %
 212 %   U n r e g i s t e r X C I m a g e                                         %
 213 %                                                                             %
 214 %                                                                             %
 215 %                                                                             %
 216 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 217 %
 218 %  UnregisterXCImage() removes format registrations made by the
 219 %  XC module from the list of supported formats.
 220 %
 221 %  The format of the UnregisterXCImage method is:
 222 %
 223 %      UnregisterXCImage(void)
 224 %
 225 */
 226 ModuleExport void UnregisterXCImage(void)
 227 {
 228   (void) UnregisterMagickInfo("CANVAS");
 229   (void) UnregisterMagickInfo("XC");
 230 }