test/src/TestColorRamp.cpp

   1 /* Copyright_License {
   2
   3   XCSoar Glide Computer - http://www.xcsoar.org/
   4   Copyright (C) 2000-2013 The XCSoar Project
   5   A detailed list of copyright holders can be found in the file "AUTHORS".
   6
   7   This program is free software; you can redistribute it and/or
   8   modify it under the terms of the GNU General Public License
   9   as published by the Free Software Foundation; either version 2
  10   of the License, or (at your option) any later version.
  11
  12   This program is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with this program; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 }
  21 */
  22
  23 #include "Screen/Ramp.hpp"
  24 #include "Screen/Color.hpp"
  25 #include "TestUtil.hpp"
  26
  27 int main(int argc, char **argv)
  28 {
  29   const ColorRamp ramp[] = {
  30     {0,    0xff, 0x80, 0x00},
  31     {1000, 0x00, 0x40, 0xcc},
  32   };
  33   const ColorRamp ramp2[] = {
  34     {-1000, 0x00, 0x00, 0xff},
  35     {   -1, 0x00, 0xff, 0xff},
  36     {    0, 0xff, 0xff, 0x00},
  37     { 1000, 0xff, 0x00, 0x00},
  38   };
  39   Color color;
  40
  41   plan_tests(39);
  42
  43   // Test lower limit
  44   color = ColorRampLookup(0, ramp, 2);
  45   ok1(color.Red() == 0xff);
  46   ok1(color.Green() == 0x80);
  47   ok1(color.Blue() == 0x00);
  48
  49   // Test below lower limit
  50   color = ColorRampLookup(-100, ramp, 2);
  51   ok1(color.Red() == 0xff);
  52   ok1(color.Green() == 0x80);
  53   ok1(color.Blue() == 0x00);
  54
  55   // Test upper limit
  56   color = ColorRampLookup(1000, ramp, 2);
  57   ok1(color.Red() == 0x00);
  58   ok1(color.Green() == 0x40);
  59   ok1(color.Blue() == 0xcc);
  60
  61   // Test above upper limit
  62   color = ColorRampLookup(1500, ramp, 2);
  63   ok1(color.Red() == 0x00);
  64   ok1(color.Green() == 0x40);
  65   ok1(color.Blue() == 0xcc);
  66
  67   // Test middle
  68   color = ColorRampLookup(500, ramp, 2);
  69   ok1(color.Red() == 0x7f);
  70   ok1(color.Green() == 0x60);
  71   ok1(color.Blue() == 0x66);
  72
  73
  74
  75   // Test lower limit
  76   color = ColorRampLookup(-1000, ramp2, 4);
  77   ok1(color.Red() == 0x00);
  78   ok1(color.Green() == 0x00);
  79   ok1(color.Blue() == 0xff);
  80
  81   // Test below lower limit
  82   color = ColorRampLookup(-2000, ramp2, 4);
  83   ok1(color.Red() == 0x00);
  84   ok1(color.Green() == 0x00);
  85   ok1(color.Blue() == 0xff);
  86
  87   // Test upper limit
  88   color = ColorRampLookup(1000, ramp2, 4);
  89   ok1(color.Red() == 0xff);
  90   ok1(color.Green() == 0x00);
  91   ok1(color.Blue() == 0x00);
  92
  93   // Test above upper limit
  94   color = ColorRampLookup(2000, ramp2, 4);
  95   ok1(color.Red() == 0xff);
  96   ok1(color.Green() == 0x00);
  97   ok1(color.Blue() == 0x00);
  98
  99   // Test interpolation point 1
 100   color = ColorRampLookup(0, ramp2, 4);
 101   ok1(color.Red() == 0xff);
 102   ok1(color.Green() == 0xff);
 103   ok1(color.Blue() == 0x00);
 104
 105   // Test interpolation point 2
 106   color = ColorRampLookup(-1, ramp2, 4);
 107   ok1(color.Red() == 0x00);
 108   ok1(color.Green() == 0xff);
 109   ok1(color.Blue() == 0xff);
 110
 111   // Test intermediate point 1
 112   color = ColorRampLookup(500, ramp2, 4);
 113   ok1(color.Red() == 0xff);
 114   ok1(color.Green() == 0x7f);
 115   ok1(color.Blue() == 0x00);
 116
 117   // Test intermediate point 2
 118   color = ColorRampLookup(-500, ramp2, 4);
 119   ok1(color.Red() == 0x00);
 120   ok1(color.Green() == 0x7f);
 121   ok1(color.Blue() == 0xff);
 122
 123   return exit_status();
 124 }