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 1999-2010 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/cache.h"
  46 #include "magick/color.h"
  47 #include "magick/color-private.h"
  48 #include "magick/exception.h"
  49 #include "magick/exception-private.h"
  50 #include "magick/image.h"
  51 #include "magick/image-private.h"
  52 #include "magick/list.h"
  53 #include "magick/magick.h"
  54 #include "magick/memory_.h"
  55 #include "magick/pixel-private.h"
  56 #include "magick/quantum-private.h"
  57 #include "magick/static.h"
  58 #include "magick/string_.h"
  59 #include "magick/module.h"
  60 \f
  61 /*
  62 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  63 %                                                                             %
  64 %                                                                             %
  65 %                                                                             %
  66 %   R e a d X C I m a g e                                                     %
  67 %                                                                             %
  68 %                                                                             %
  69 %                                                                             %
  70 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  71 %
  72 %  ReadXCImage creates a constant image and initializes it to the
  73 %  X server color as specified by the filename.  It allocates the memory
  74 %  necessary for the new Image structure and returns a pointer to the new
  75 %  image.
  76 %
  77 %  The format of the ReadXCImage method is:
  78 %
  79 %      Image *ReadXCImage(const ImageInfo *image_info,ExceptionInfo *exception)
  80 %
  81 %  A description of each parameter follows:
  82 %
  83 %    o image:  The image.
  84 %
  85 %    o image_info: the image info.
  86 %
  87 %    o exception: return any errors or warnings in this structure.
  88 %
  89 */
  90 static Image *ReadXCImage(const ImageInfo *image_info,ExceptionInfo *exception)
  91 {
  92   Image
  93     *image;
  94
  95   IndexPacket
  96     index,
  97     *indexes;
  98
  99   MagickBooleanType
 100     status;
 101
 102   MagickPixelPacket
 103     color;
 104
 105   ssize_t
 106     y;
 107
 108   PixelPacket
 109     pixel;
 110
 111   register ssize_t
 112     x;
 113
 114   register PixelPacket
 115     *q;
 116
 117   /*
 118     Initialize Image structure.
 119   */
 120   assert(image_info != (const ImageInfo *) NULL);
 121   assert(image_info->signature == MagickSignature);
 122   if (image_info->debug != MagickFalse)
 123     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 124       image_info->filename);
 125   assert(exception != (ExceptionInfo *) NULL);
 126   assert(exception->signature == MagickSignature);
 127   image=AcquireImage(image_info);
 128   if (image->columns == 0)
 129     image->columns=1;
 130   if (image->rows == 0)
 131     image->rows=1;
 132   (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
 133   status=QueryMagickColor((char *) image_info->filename,&color,exception);
 134   if (status == MagickFalse)
 135     {
 136       image=DestroyImage(image);
 137       return((Image *) NULL);
 138     }
 139   image->colorspace=color.colorspace;
 140   image->matte=color.matte;
 141   index=0;
 142   SetPixelPacket(image,&color,&pixel,&index);
 143   for (y=0; y < (ssize_t) image->rows; y++)
 144   {
 145     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 146     if (q == (PixelPacket *) NULL)
 147       break;
 148     for (x=0; x < (ssize_t) image->columns; x++)
 149       *q++=pixel;
 150     if (image->colorspace == CMYKColorspace)
 151       {
 152         indexes=GetAuthenticIndexQueue(image);
 153         for (x=0; x < (ssize_t) image->columns; x++)
 154           indexes[x]=index;
 155       }
 156     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 157       break;
 158   }
 159   return(GetFirstImageInList(image));
 160 }
 161 \f
 162 /*
 163 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 164 %                                                                             %
 165 %                                                                             %
 166 %                                                                             %
 167 %   R e g i s t e r X C I m a g e                                             %
 168 %                                                                             %
 169 %                                                                             %
 170 %                                                                             %
 171 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 172 %
 173 %  RegisterXCImage() adds attributes for the XC image format to
 174 %  the list of supported formats.  The attributes include the image format
 175 %  tag, a method to read and/or write the format, whether the format
 176 %  supports the saving of more than one frame to the same file or blob,
 177 %  whether the format supports native in-memory I/O, and a brief
 178 %  description of the format.
 179 %
 180 %  The format of the RegisterXCImage method is:
 181 %
 182 %      size_t RegisterXCImage(void)
 183 %
 184 */
 185 ModuleExport size_t RegisterXCImage(void)
 186 {
 187   MagickInfo
 188     *entry;
 189
 190   entry=SetMagickInfo("XC");
 191   entry->decoder=(DecodeImageHandler *) ReadXCImage;
 192   entry->adjoin=MagickFalse;
 193   entry->format_type=ImplicitFormatType;
 194   entry->raw=MagickTrue;
 195   entry->endian_support=MagickTrue;
 196   entry->description=ConstantString("Constant image uniform color");
 197   entry->module=ConstantString("XC");
 198   (void) RegisterMagickInfo(entry);
 199   return(MagickImageCoderSignature);
 200 }
 201 \f
 202 /*
 203 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 204 %                                                                             %
 205 %                                                                             %
 206 %                                                                             %
 207 %   U n r e g i s t e r X C I m a g e                                         %
 208 %                                                                             %
 209 %                                                                             %
 210 %                                                                             %
 211 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 212 %
 213 %  UnregisterXCImage() removes format registrations made by the
 214 %  XC module from the list of supported formats.
 215 %
 216 %  The format of the UnregisterXCImage method is:
 217 %
 218 %      UnregisterXCImage(void)
 219 %
 220 */
 221 ModuleExport void UnregisterXCImage(void)
 222 {
 223   (void) UnregisterMagickInfo("XC");
 224 }