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 1999-2011 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/colorspace.h"
  47 #include "MagickCore/exception.h"
  48 #include "MagickCore/exception-private.h"
  49 #include "MagickCore/image.h"
  50 #include "MagickCore/image-private.h"
  51 #include "MagickCore/list.h"
  52 #include "MagickCore/magick.h"
  53 #include "MagickCore/memory_.h"
  54 #include "MagickCore/module.h"
  55 #include "MagickCore/monitor.h"
  56 #include "MagickCore/monitor-private.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/string-private.h"
  62 \f
  63 /*
  64 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  65 %                                                                             %
  66 %                                                                             %
  67 %                                                                             %
  68 %   R e a d H A L D I m a g e                                                 %
  69 %                                                                             %
  70 %                                                                             %
  71 %                                                                             %
  72 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  73 %
  74 %  ReadHALDImage() creates a Hald color lookup table image and returns it.  It
  75 %  allocates the memory necessary for the new Image structure and returns a
  76 %  pointer to the new image.
  77 %
  78 %  The format of the ReadHALDImage method is:
  79 %
  80 %      Image *ReadHALDImage(const ImageInfo *image_info,
  81 %        ExceptionInfo *exception)
  82 %
  83 %  A description of each parameter follows:
  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 *ReadHALDImage(const ImageInfo *image_info,
  91   ExceptionInfo *exception)
  92 {
  93   Image
  94     *image;
  95
  96   MagickBooleanType
  97     status;
  98
  99   size_t
 100     cube_size,
 101     level;
 102
 103   ssize_t
 104     y;
 105
 106   /*
 107     Create HALD color lookup table image.
 108   */
 109   assert(image_info != (const ImageInfo *) NULL);
 110   assert(image_info->signature == MagickSignature);
 111   if (image_info->debug != MagickFalse)
 112     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 113       image_info->filename);
 114   assert(exception != (ExceptionInfo *) NULL);
 115   assert(exception->signature == MagickSignature);
 116   image=AcquireImage(image_info);
 117   level=0;
 118   if (*image_info->filename != '\0')
 119     level=StringToUnsignedLong(image_info->filename);
 120   if (level < 2)
 121     level=8;
 122   status=MagickTrue;
 123   cube_size=level*level;
 124   image->columns=(size_t) (level*cube_size);
 125   image->rows=(size_t) (level*cube_size);
 126   for (y=0; y < (ssize_t) image->rows; y+=(ssize_t) level)
 127   {
 128     ssize_t
 129       blue,
 130       green,
 131       red;
 132
 133     register Quantum
 134       *restrict q;
 135
 136     if (status == MagickFalse)
 137       continue;
 138     q=QueueAuthenticPixels(image,0,y,image->columns,(size_t) level,
 139       exception);
 140     if (q == (Quantum *) NULL)
 141       {
 142         status=MagickFalse;
 143         continue;
 144       }
 145     blue=y/(ssize_t) level;
 146     for (green=0; green < (ssize_t) cube_size; green++)
 147     {
 148       for (red=0; red < (ssize_t) cube_size; red++)
 149       {
 150         SetPixelRed(image,ClampToQuantum(QuantumRange*red/(cube_size-1.0)),q);
 151         SetPixelGreen(image,ClampToQuantum(QuantumRange*green/
 152           (cube_size-1.0)),q);
 153         SetPixelBlue(image,ClampToQuantum(QuantumRange*blue/(cube_size-1.0)),q);
 154         SetPixelAlpha(image,OpaqueAlpha,q);
 155         q+=GetPixelChannels(image);
 156       }
 157     }
 158     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 159       status=MagickFalse;
 160   }
 161   return(GetFirstImageInList(image));
 162 }
 163 \f
 164 /*
 165 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 166 %                                                                             %
 167 %                                                                             %
 168 %                                                                             %
 169 %   R e g i s t e r H A L D I m a g e                                         %
 170 %                                                                             %
 171 %                                                                             %
 172 %                                                                             %
 173 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 174 %
 175 %  RegisterHALDImage() adds attributes for the Hald color lookup table image
 176 %  format to the list of supported formats.  The attributes include the image
 177 %  format tag, a method to read and/or write the format, whether the format
 178 %  supports the saving of more than one frame to the same file or blob, whether
 179 %  the format supports native in-memory I/O, and a brief description of the
 180 %  format.
 181 %
 182 %  The format of the RegisterHALDImage method is:
 183 %
 184 %      size_t RegisterHALDImage(void)
 185 %
 186 */
 187 ModuleExport size_t RegisterHALDImage(void)
 188 {
 189   MagickInfo
 190     *entry;
 191
 192   entry=SetMagickInfo("HALD");
 193   entry->decoder=(DecodeImageHandler *) ReadHALDImage;
 194   entry->adjoin=MagickFalse;
 195   entry->format_type=ImplicitFormatType;
 196   entry->raw=MagickTrue;
 197   entry->endian_support=MagickTrue;
 198   entry->description=ConstantString("Identity Hald color lookup table image");
 199   (void) RegisterMagickInfo(entry);
 200   return(MagickImageCoderSignature);
 201 }
 202 \f
 203 /*
 204 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 205 %                                                                             %
 206 %                                                                             %
 207 %                                                                             %
 208 %   U n r e g i s t e r H A L D I m a g e                                     %
 209 %                                                                             %
 210 %                                                                             %
 211 %                                                                             %
 212 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 213 %
 214 %  UnregisterHALDImage() removes format registrations made by the
 215 %  HALD module from the list of supported formats.
 216 %
 217 %  The format of the UnregisterHALDImage method is:
 218 %
 219 %      UnregisterHALDImage(void)
 220 %
 221 */
 222 ModuleExport void UnregisterHALDImage(void)
 223 {
 224   (void) UnregisterMagickInfo("HALD");
 225 }