tests/chromaticities.c

   1 /* babl - dynamically extendable universal pixel conversion library.
   2  * Copyright (C) 2005, 2017 Øyvind Kolås.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 3 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General
  15  * Public License along with this library; if not, see
  16  * <https://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "config.h"
  20 #include <math.h>
  21 #include "babl-internal.h"
  22
  23 #define PIXELS       6
  24 #define TOLERANCE    0
  25
  26 unsigned char source_buf [PIXELS * 3] =
  27 { 0,    0,   0,
  28   127, 127, 127,
  29   255, 255, 255,
  30   255, 0.0, 0.0,
  31   0.0, 255, 0.0,
  32   0.0, 0.0, 255 };
  33
  34 unsigned char reference_buf [PIXELS * 3] =
  35 { 0,   0,     0,
  36   145, 145, 145,
  37   255, 255, 255,
  38   255, 43,  6,
  39   0.0, 250, 48,
  40   25,  34, 251};
  41
  42 unsigned char destination_buf [PIXELS * 3];
  43
  44 static int
  45 test (void)
  46 {
  47   int i;
  48   int OK = 1;
  49
  50   babl_process (babl_fish (babl_format_with_space ("R'G'B' u8", babl_space("Apple")), "R'G'B' u8"),
  51                 source_buf, destination_buf,
  52                 PIXELS);
  53
  54   for (i = 0; i < PIXELS * 3; i++)
  55     {
  56       if (abs (destination_buf[i] - reference_buf[i]) > TOLERANCE)
  57         {
  58           babl_log ("%2i (%2i%%3=%i, %2i/3=%i) is %i should be %i",
  59                     i, i, i % 3, i, i / 3, destination_buf[i], reference_buf[i]);
  60           OK = 0;
  61         }
  62     }
  63   if (!OK)
  64     return -1;
  65   return 0;
  66 }
  67
  68 int
  69 main (void)
  70 {
  71   babl_init ();
  72   if (test ())
  73     return -1;
  74   babl_exit ();
  75   return 0;
  76 }