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 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2018 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 %    https://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/resource_.h"
  60 #include "MagickCore/static.h"
  61 #include "MagickCore/string_.h"
  62 #include "MagickCore/string-private.h"
  63 #include "MagickCore/thread-private.h"
  64 \f
  65 /*
  66 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  67 %                                                                             %
  68 %                                                                             %
  69 %                                                                             %
  70 %   R e a d H A L D I m a g e                                                 %
  71 %                                                                             %
  72 %                                                                             %
  73 %                                                                             %
  74 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  75 %
  76 %  ReadHALDImage() creates a Hald color lookup table image and returns it.  It
  77 %  allocates the memory necessary for the new Image structure and returns a
  78 %  pointer to the new image.
  79 %
  80 %  The format of the ReadHALDImage method is:
  81 %
  82 %      Image *ReadHALDImage(const ImageInfo *image_info,
  83 %        ExceptionInfo *exception)
  84 %
  85 %  A description of each parameter follows:
  86 %
  87 %    o image_info: the image info.
  88 %
  89 %    o exception: return any errors or warnings in this structure.
  90 %
  91 */
  92 static Image *ReadHALDImage(const ImageInfo *image_info,
  93   ExceptionInfo *exception)
  94 {
  95   Image
  96     *image;
  97
  98   MagickBooleanType
  99     status;
 100
 101   size_t
 102     cube_size,
 103     level;
 104
 105   ssize_t
 106     y;
 107
 108   /*
 109     Create HALD color lookup table image.
 110   */
 111   assert(image_info != (const ImageInfo *) NULL);
 112   assert(image_info->signature == MagickCoreSignature);
 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 == MagickCoreSignature);
 118   image=AcquireImage(image_info,exception);
 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=(size_t) (level*cube_size);
 127   image->rows=(size_t) (level*cube_size);
 128   status=SetImageExtent(image,image->columns,image->rows,exception);
 129   if (status == MagickFalse)
 130     return(DestroyImageList(image));
 131   for (y=0; y < (ssize_t) image->rows; y+=(ssize_t) level)
 132   {
 133     ssize_t
 134       blue,
 135       green,
 136       red;
 137
 138     register Quantum
 139       *magick_restrict q;
 140
 141     if (status == MagickFalse)
 142       continue;
 143     q=QueueAuthenticPixels(image,0,y,image->columns,(size_t) level,exception);
 144     if (q == (Quantum *) NULL)
 145       {
 146         status=MagickFalse;
 147         continue;
 148       }
 149     blue=y/(ssize_t) level;
 150     for (green=0; green < (ssize_t) cube_size; green++)
 151     {
 152       for (red=0; red < (ssize_t) cube_size; red++)
 153       {
 154         SetPixelRed(image,ClampToQuantum(QuantumRange*red/(cube_size-1.0)),q);
 155         SetPixelGreen(image,ClampToQuantum(QuantumRange*green/(cube_size-1.0)),
 156           q);
 157         SetPixelBlue(image,ClampToQuantum(QuantumRange*blue/(cube_size-1.0)),q);
 158         SetPixelAlpha(image,OpaqueAlpha,q);
 159         q+=GetPixelChannels(image);
 160       }
 161     }
 162     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 163       status=MagickFalse;
 164   }
 165   return(GetFirstImageInList(image));
 166 }
 167 \f
 168 /*
 169 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 170 %                                                                             %
 171 %                                                                             %
 172 %                                                                             %
 173 %   R e g i s t e r H A L D I m a g e                                         %
 174 %                                                                             %
 175 %                                                                             %
 176 %                                                                             %
 177 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 178 %
 179 %  RegisterHALDImage() adds attributes for the Hald color lookup table image
 180 %  format to the list of supported formats.  The attributes include the image
 181 %  format tag, a method to read and/or write the format, whether the format
 182 %  supports the saving of more than one frame to the same file or blob, whether
 183 %  the format supports native in-memory I/O, and a brief description of the
 184 %  format.
 185 %
 186 %  The format of the RegisterHALDImage method is:
 187 %
 188 %      size_t RegisterHALDImage(void)
 189 %
 190 */
 191 ModuleExport size_t RegisterHALDImage(void)
 192 {
 193   MagickInfo
 194     *entry;
 195
 196   entry=AcquireMagickInfo("HALD","HALD",
 197     "Identity Hald color lookup table image");
 198   entry->decoder=(DecodeImageHandler *) ReadHALDImage;
 199   entry->flags^=CoderAdjoinFlag;
 200   entry->format_type=ImplicitFormatType;
 201   entry->flags|=CoderRawSupportFlag;
 202   entry->flags|=CoderEndianSupportFlag;
 203   (void) RegisterMagickInfo(entry);
 204   return(MagickImageCoderSignature);
 205 }
 206 \f
 207 /*
 208 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 209 %                                                                             %
 210 %                                                                             %
 211 %                                                                             %
 212 %   U n r e g i s t e r H A L D I m a g e                                     %
 213 %                                                                             %
 214 %                                                                             %
 215 %                                                                             %
 216 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 217 %
 218 %  UnregisterHALDImage() removes format registrations made by the
 219 %  HALD module from the list of supported formats.
 220 %
 221 %  The format of the UnregisterHALDImage method is:
 222 %
 223 %      UnregisterHALDImage(void)
 224 %
 225 */
 226 ModuleExport void UnregisterHALDImage(void)
 227 {
 228   (void) UnregisterMagickInfo("HALD");
 229 }