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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                        H   H   AAA   L      DDDD                            %
   7 %                        H   H  A   A  L      D   D                           %
   8 %                        HHHHH  AAAAA  L      D   D                           %
   9 %                        H   H  A   A  L      D   D                           %
  10 %                        H   H  A   A  LLLLL  DDDD                            %
  11 %                                                                             %
  12 %                                                                             %
  13 %                   Create Identity Hald CLUT Image Format                    %
  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/colorspace.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/module.h"
  55 #include "magick/monitor.h"
  56 #include "magick/monitor-private.h"
  57 #include "magick/quantum-private.h"
  58 #include "magick/static.h"
  59 #include "magick/string_.h"
  60 #include "magick/string-private.h"
  61 \f
  62 /*
  63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  64 %                                                                             %
  65 %                                                                             %
  66 %                                                                             %
  67 %   R e a d H A L D I m a g e                                                 %
  68 %                                                                             %
  69 %                                                                             %
  70 %                                                                             %
  71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  72 %
  73 %  ReadHALDImage() creates a Hald color lookup table image and returns it.  It
  74 %  allocates the memory necessary for the new Image structure and returns a
  75 %  pointer to the new image.
  76 %
  77 %  The format of the ReadHALDImage method is:
  78 %
  79 %      Image *ReadHALDImage(const ImageInfo *image_info,
  80 %        ExceptionInfo *exception)
  81 %
  82 %  A description of each parameter follows:
  83 %
  84 %    o image_info: the image info.
  85 %
  86 %    o exception: return any errors or warnings in this structure.
  87 %
  88 */
  89 static Image *ReadHALDImage(const ImageInfo *image_info,
  90   ExceptionInfo *exception)
  91 {
  92   Image
  93     *image;
  94
  95   long
  96     y;
  97
  98   MagickBooleanType
  99     status;
 100
 101   size_t
 102     cube_size,
 103     level;
 104
 105   /*
 106     Create HALD color lookup table image.
 107   */
 108   assert(image_info != (const ImageInfo *) NULL);
 109   assert(image_info->signature == MagickSignature);
 110   if (image_info->debug != MagickFalse)
 111     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 112       image_info->filename);
 113   assert(exception != (ExceptionInfo *) NULL);
 114   assert(exception->signature == MagickSignature);
 115   image=AcquireImage(image_info);
 116   level=0;
 117   if (*image_info->filename != '\0')
 118     level=StringToUnsignedLong(image_info->filename);
 119   if (level < 2)
 120     level=8;
 121   status=MagickTrue;
 122   cube_size=level*level;
 123   image->columns=(unsigned long) (level*cube_size);
 124   image->rows=(unsigned long) (level*cube_size);
 125   for (y=0; y < (long) image->rows; y+=(long) level)
 126   {
 127     long
 128       blue,
 129       green,
 130       red;
 131
 132     register PixelPacket
 133       *restrict q;
 134
 135     if (status == MagickFalse)
 136       continue;
 137     q=QueueAuthenticPixels(image,0,y,image->columns,(unsigned long) level,
 138       exception);
 139     if (q == (PixelPacket *) NULL)
 140       {
 141         status=MagickFalse;
 142         continue;
 143       }
 144     blue=y/(long) level;
 145     for (green=0; green < (long) cube_size; green++)
 146     {
 147       for (red=0; red < (long) cube_size; red++)
 148       {
 149         q->red=ClampToQuantum(QuantumRange*red/(cube_size-1.0));
 150         q->green=ClampToQuantum(QuantumRange*green/(cube_size-1.0));
 151         q->blue=ClampToQuantum(QuantumRange*blue/(cube_size-1.0));
 152         SetOpacityPixelComponent(q,OpaqueOpacity);
 153         q++;
 154       }
 155     }
 156     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 157       status=MagickFalse;
 158   }
 159   return(GetFirstImageInList(image));
 160 }
 161 \f
 162 /*
 163 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 164 %                                                                             %
 165 %                                                                             %
 166 %                                                                             %
 167 %   R e g i s t e r H A L D I m a g e                                         %
 168 %                                                                             %
 169 %                                                                             %
 170 %                                                                             %
 171 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 172 %
 173 %  RegisterHALDImage() adds attributes for the Hald color lookup table image
 174 %  format to the list of supported formats.  The attributes include the image
 175 %  format 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, whether
 177 %  the format supports native in-memory I/O, and a brief description of the
 178 %  format.
 179 %
 180 %  The format of the RegisterHALDImage method is:
 181 %
 182 %      unsigned long RegisterHALDImage(void)
 183 %
 184 */
 185 ModuleExport unsigned long RegisterHALDImage(void)
 186 {
 187   MagickInfo
 188     *entry;
 189
 190   entry=SetMagickInfo("HALD");
 191   entry->decoder=(DecodeImageHandler *) ReadHALDImage;
 192   entry->adjoin=MagickFalse;
 193   entry->format_type=ExplicitFormatType;
 194   entry->raw=MagickTrue;
 195   entry->endian_support=MagickTrue;
 196   entry->description=ConstantString("Identity Hald color lookup table image");
 197   (void) RegisterMagickInfo(entry);
 198   return(MagickImageCoderSignature);
 199 }
 200 \f
 201 /*
 202 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 203 %                                                                             %
 204 %                                                                             %
 205 %                                                                             %
 206 %   U n r e g i s t e r H A L D I m a g e                                     %
 207 %                                                                             %
 208 %                                                                             %
 209 %                                                                             %
 210 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 211 %
 212 %  UnregisterHALDImage() removes format registrations made by the
 213 %  HALD module from the list of supported formats.
 214 %
 215 %  The format of the UnregisterHALDImage method is:
 216 %
 217 %      UnregisterHALDImage(void)
 218 %
 219 */
 220 ModuleExport void UnregisterHALDImage(void)
 221 {
 222   (void) UnregisterMagickInfo("HALD");
 223 }