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   CacheView
 106     *image_view;
 107
 108   /*
 109     Create HALD color lookup table image.
 110   */
 111   assert(image_info != (const ImageInfo *) NULL);
 112   assert(image_info->signature == MagickSignature);
 113   if (image_info->debug != MagickFalse)
 114     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 115       image_info->filename);
 116   assert(exception != (ExceptionInfo *) NULL);
 117   assert(exception->signature == MagickSignature);
 118   image=AcquireImage(image_info);
 119   level=0;
 120   if (*image_info->filename != '\0')
 121     level=StringToUnsignedLong(image_info->filename);
 122   if (level < 2)
 123     level=8;
 124   status=MagickTrue;
 125   cube_size=level*level;
 126   image->columns=(unsigned long) (level*cube_size);
 127   image->rows=(unsigned long) (level*cube_size);
 128   image_view=AcquireCacheView(image);
 129 #if defined(MAGICKCORE_OPENMP_SUPPORT) && (_OPENMP > 202001)
 130   #pragma omp parallel for shared(status)
 131 #endif
 132   for (y=0; y < (long) image->rows; y+=(long) level)
 133   {
 134     long
 135       blue,
 136       green,
 137       red;
 138
 139     register PixelPacket
 140       *restrict q;
 141
 142     if (status == MagickFalse)
 143       continue;
 144     q=QueueCacheViewAuthenticPixels(image_view,0,y,image->columns,
 145       (unsigned long) level,exception);
 146     if (q == (PixelPacket *) NULL)
 147       {
 148         status=MagickFalse;
 149         continue;
 150       }
 151     blue=y/(long) level;
 152     for (green=0; green < (long) cube_size; green++)
 153     {
 154       for (red=0; red < (long) cube_size; red++)
 155       {
 156         q->red=ClampToQuantum(QuantumRange*red/(cube_size-1.0));
 157         q->green=ClampToQuantum(QuantumRange*green/(cube_size-1.0));
 158         q->blue=ClampToQuantum(QuantumRange*blue/(cube_size-1.0));
 159         SetOpacityPixelComponent(q,OpaqueOpacity);
 160         q++;
 161       }
 162     }
 163     if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
 164       status=MagickFalse;
 165   }
 166   image_view=DestroyCacheView(image_view);
 167   return(GetFirstImageInList(image));
 168 }
 169 \f
 170 /*
 171 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 172 %                                                                             %
 173 %                                                                             %
 174 %                                                                             %
 175 %   R e g i s t e r H A L D I m a g e                                         %
 176 %                                                                             %
 177 %                                                                             %
 178 %                                                                             %
 179 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 180 %
 181 %  RegisterHALDImage() adds attributes for the Hald color lookup table image
 182 %  format to the list of supported formats.  The attributes include the image
 183 %  format tag, a method to read and/or write the format, whether the format
 184 %  supports the saving of more than one frame to the same file or blob, whether
 185 %  the format supports native in-memory I/O, and a brief description of the
 186 %  format.
 187 %
 188 %  The format of the RegisterHALDImage method is:
 189 %
 190 %      unsigned long RegisterHALDImage(void)
 191 %
 192 */
 193 ModuleExport unsigned long RegisterHALDImage(void)
 194 {
 195   MagickInfo
 196     *entry;
 197
 198   entry=SetMagickInfo("HALD");
 199   entry->decoder=(DecodeImageHandler *) ReadHALDImage;
 200   entry->adjoin=MagickFalse;
 201   entry->format_type=ExplicitFormatType;
 202   entry->raw=MagickTrue;
 203   entry->endian_support=MagickTrue;
 204   entry->description=ConstantString("Identity Hald color lookup table image");
 205   (void) RegisterMagickInfo(entry);
 206   return(MagickImageCoderSignature);
 207 }
 208 \f
 209 /*
 210 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 211 %                                                                             %
 212 %                                                                             %
 213 %                                                                             %
 214 %   U n r e g i s t e r H A L D I m a g e                                     %
 215 %                                                                             %
 216 %                                                                             %
 217 %                                                                             %
 218 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 219 %
 220 %  UnregisterHALDImage() removes format registrations made by the
 221 %  HALD module from the list of supported formats.
 222 %
 223 %  The format of the UnregisterHALDImage method is:
 224 %
 225 %      UnregisterHALDImage(void)
 226 %
 227 */
 228 ModuleExport void UnregisterHALDImage(void)
 229 {
 230   (void) UnregisterMagickInfo("HALD");
 231 }