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 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2013 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/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/pixel.h"
  56 #include "MagickCore/pixel-accessor.h"
  57 #include "MagickCore/quantum-private.h"
  58 #include "MagickCore/static.h"
  59 #include "MagickCore/string_.h"
  60 #include "MagickCore/module.h"
  61 \f
  62 /*
  63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  64 %                                                                             %
  65 %                                                                             %
  66 %                                                                             %
  67 %   R e a d X C I m a g e                                                     %
  68 %                                                                             %
  69 %                                                                             %
  70 %                                                                             %
  71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  72 %
  73 %  ReadXCImage creates a constant image and initializes it to the
  74 %  X server color as specified by the filename.  It allocates the memory
  75 %  necessary for the new Image structure and returns a pointer to the new
  76 %  image.
  77 %
  78 %  The format of the ReadXCImage method is:
  79 %
  80 %      Image *ReadXCImage(const ImageInfo *image_info,ExceptionInfo *exception)
  81 %
  82 %  A description of each parameter follows:
  83 %
  84 %    o image:  The image.
  85 %
  86 %    o image_info: the image info.
  87 %
  88 %    o exception: return any errors or warnings in this structure.
  89 %
  90 */
  91 static Image *ReadXCImage(const ImageInfo *image_info,ExceptionInfo *exception)
  92 {
  93   Image
  94     *image;
  95
  96   MagickBooleanType
  97     status;
  98
  99   PixelInfo
 100     pixel;
 101
 102   register ssize_t
 103     x;
 104
 105   register Quantum
 106     *q;
 107
 108   ssize_t
 109     y;
 110
 111   /*
 112     Initialize Image structure.
 113   */
 114   assert(image_info != (const ImageInfo *) NULL);
 115   assert(image_info->signature == MagickSignature);
 116   if (image_info->debug != MagickFalse)
 117     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 118       image_info->filename);
 119   assert(exception != (ExceptionInfo *) NULL);
 120   assert(exception->signature == MagickSignature);
 121   image=AcquireImage(image_info,exception);
 122   if (image->columns == 0)
 123     image->columns=1;
 124   if (image->rows == 0)
 125     image->rows=1;
 126   (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
 127   if (*image_info->filename == '\0')
 128     pixel=image->background_color;
 129   else
 130     {
 131       status=QueryColorCompliance((char *) image_info->filename,AllCompliance,
 132         &pixel,exception);
 133       if (status == MagickFalse)
 134         {
 135           image=DestroyImage(image);
 136           return((Image *) NULL);
 137         }
 138     }
 139   SetImageColorspace(image,pixel.colorspace,exception);
 140   image->alpha_trait=pixel.alpha_trait;
 141   for (y=0; y < (ssize_t) image->rows; y++)
 142   {
 143     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 144     if (q == (Quantum *) NULL)
 145       break;
 146     for (x=0; x < (ssize_t) image->columns; x++)
 147     {
 148       SetPixelInfoPixel(image,&pixel,q);
 149       q+=GetPixelChannels(image);
 150     }
 151     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 152       break;
 153   }
 154   return(GetFirstImageInList(image));
 155 }
 156 \f
 157 /*
 158 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 159 %                                                                             %
 160 %                                                                             %
 161 %                                                                             %
 162 %   R e g i s t e r X C I m a g e                                             %
 163 %                                                                             %
 164 %                                                                             %
 165 %                                                                             %
 166 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 167 %
 168 %  RegisterXCImage() adds attributes for the XC image format to
 169 %  the list of supported formats.  The attributes include the image format
 170 %  tag, a method to read and/or write the format, whether the format
 171 %  supports the saving of more than one frame to the same file or blob,
 172 %  whether the format supports native in-memory I/O, and a brief
 173 %  description of the format.
 174 %
 175 %  The format of the RegisterXCImage method is:
 176 %
 177 %      size_t RegisterXCImage(void)
 178 %
 179 */
 180 ModuleExport size_t RegisterXCImage(void)
 181 {
 182   MagickInfo
 183     *entry;
 184
 185   entry=SetMagickInfo("XC");
 186   entry->decoder=(DecodeImageHandler *) ReadXCImage;
 187   entry->adjoin=MagickFalse;
 188   entry->format_type=ImplicitFormatType;
 189   entry->raw=MagickTrue;
 190   entry->endian_support=MagickTrue;
 191   entry->description=ConstantString("Constant image uniform color");
 192   entry->module=ConstantString("XC");
 193   (void) RegisterMagickInfo(entry);
 194   entry=SetMagickInfo("CANVAS");
 195   entry->decoder=(DecodeImageHandler *) ReadXCImage;
 196   entry->adjoin=MagickFalse;
 197   entry->format_type=ImplicitFormatType;
 198   entry->raw=MagickTrue;
 199   entry->endian_support=MagickTrue;
 200   entry->description=ConstantString("Constant image uniform color");
 201   entry->module=ConstantString("XC");
 202   (void) RegisterMagickInfo(entry);
 203   return(MagickImageCoderSignature);
 204 }
 205 \f
 206 /*
 207 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 208 %                                                                             %
 209 %                                                                             %
 210 %                                                                             %
 211 %   U n r e g i s t e r X C I m a g e                                         %
 212 %                                                                             %
 213 %                                                                             %
 214 %                                                                             %
 215 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 216 %
 217 %  UnregisterXCImage() removes format registrations made by the
 218 %  XC module from the list of supported formats.
 219 %
 220 %  The format of the UnregisterXCImage method is:
 221 %
 222 %      UnregisterXCImage(void)
 223 %
 224 */
 225 ModuleExport void UnregisterXCImage(void)
 226 {
 227   (void) UnregisterMagickInfo("CANVAS");
 228   (void) UnregisterMagickInfo("XC");
 229 }