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 1999-2012 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,exception);
 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 #if defined(MAGICKCORE_OPENMP_SUPPORT)
 127   #pragma omp parallel for schedule(static,8) shared(status)
 128 #endif
 129   for (y=0; y < (ssize_t) image->rows; y+=(ssize_t) level)
 130   {
 131     ssize_t
 132       blue,
 133       green,
 134       red;
 135
 136     register Quantum
 137       *restrict q;
 138
 139     if (status == MagickFalse)
 140       continue;
 141     q=QueueAuthenticPixels(image,0,y,image->columns,(size_t) level,
 142       exception);
 143     if (q == (Quantum *) NULL)
 144       {
 145         status=MagickFalse;
 146         continue;
 147       }
 148     blue=y/(ssize_t) level;
 149     for (green=0; green < (ssize_t) cube_size; green++)
 150     {
 151       for (red=0; red < (ssize_t) cube_size; red++)
 152       {
 153         SetPixelRed(image,ClampToQuantum(QuantumRange*red/(cube_size-1.0)),q);
 154         SetPixelGreen(image,ClampToQuantum(QuantumRange*green/(cube_size-1.0)),
 155           q);
 156         SetPixelBlue(image,ClampToQuantum(QuantumRange*blue/(cube_size-1.0)),q);
 157         SetPixelAlpha(image,OpaqueAlpha,q);
 158         q+=GetPixelChannels(image);
 159       }
 160     }
 161     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 162       status=MagickFalse;
 163   }
 164   return(GetFirstImageInList(image));
 165 }
 166 \f
 167 /*
 168 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 169 %                                                                             %
 170 %                                                                             %
 171 %                                                                             %
 172 %   R e g i s t e r H A L D I m a g e                                         %
 173 %                                                                             %
 174 %                                                                             %
 175 %                                                                             %
 176 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 177 %
 178 %  RegisterHALDImage() adds attributes for the Hald color lookup table image
 179 %  format to the list of supported formats.  The attributes include the image
 180 %  format tag, a method to read and/or write the format, whether the format
 181 %  supports the saving of more than one frame to the same file or blob, whether
 182 %  the format supports native in-memory I/O, and a brief description of the
 183 %  format.
 184 %
 185 %  The format of the RegisterHALDImage method is:
 186 %
 187 %      size_t RegisterHALDImage(void)
 188 %
 189 */
 190 ModuleExport size_t RegisterHALDImage(void)
 191 {
 192   MagickInfo
 193     *entry;
 194
 195   entry=SetMagickInfo("HALD");
 196   entry->decoder=(DecodeImageHandler *) ReadHALDImage;
 197   entry->adjoin=MagickFalse;
 198   entry->format_type=ImplicitFormatType;
 199   entry->raw=MagickTrue;
 200   entry->endian_support=MagickTrue;
 201   entry->description=ConstantString("Identity Hald color lookup table image");
 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 H A L D I m a g e                                     %
 212 %                                                                             %
 213 %                                                                             %
 214 %                                                                             %
 215 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 216 %
 217 %  UnregisterHALDImage() removes format registrations made by the
 218 %  HALD module from the list of supported formats.
 219 %
 220 %  The format of the UnregisterHALDImage method is:
 221 %
 222 %      UnregisterHALDImage(void)
 223 %
 224 */
 225 ModuleExport void UnregisterHALDImage(void)
 226 {
 227   (void) UnregisterMagickInfo("HALD");
 228 }