test/lcms/gamma.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <lcms2.h>
   7
   8 #include <stdio.h>
   9
  10 // get gamma from ICC file
  11
  12 int main(int argc, char **argv)
  13 {
  14     char *filename;
  15     cmsHPROFILE hProfile;
  16     cmsToneCurve *tc_red, *tc_green, *tc_blue;
  17     int i;
  18
  19     if (argc == 2)
  20     {
  21         filename = argv[1];
  22     }
  23     else
  24     {
  25         filename = "SYS:Prefs/Presets/Colortables/ICC/sRGB.icc";
  26     }
  27
  28     hProfile = cmsOpenProfileFromFile(filename, "r");
  29     if (hProfile)
  30     {
  31         tc_red = cmsReadTag(hProfile, cmsSigRedTRCTag);
  32         tc_green = cmsReadTag(hProfile, cmsSigGreenTRCTag);
  33         tc_blue = cmsReadTag(hProfile, cmsSigBlueTRCTag);
  34         if (tc_red && tc_green && tc_blue)
  35         {
  36             for (i=0; i < 256; i++)
  37             {
  38                 printf("i %d red %u green %u blue %u\n", i, cmsEvalToneCurve16(tc_red, i * 256) >> 8, cmsEvalToneCurve16(tc_green, i * 256) >> 8, cmsEvalToneCurve16(tc_blue, i * 256) >> 8);
  39             }
  40         }
  41         else
  42         {
  43             puts("Gamma tags missing");
  44         }
  45         cmsCloseProfile(hProfile);
  46     }
  47     else
  48     {
  49         puts("Couldn't open ICC file");
  50         return 1;
  51     }
  52     return 0;
  53 }