git.sesse.net Git - movit/blob - gamma_expansion_effect_test.cpp

   1 // Unit tests for GammaExpansionEffect.
   2
   3 #include "test_util.h"
   4 #include "gtest/gtest.h"
   5 #include "gamma_expansion_effect.h"
   6
   7 TEST(GammaExpansionEffectTest, sRGB_KeyValues) {
   8         float data[] = {
   9                 0.0f, 1.0f,
  10                 0.040f, 0.041f,  // On either side of the discontinuity.
  11         };
  12         float expected_data[] = {
  13                 0.0f, 1.0f,
  14                 0.00309f, 0.00317f,
  15         };
  16         float out_data[4];
  17         EffectChainTester tester(data, 2, 2, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_sRGB);
  18         tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
  19
  20         expect_equal(expected_data, out_data, 2, 2);
  21 }
  22
  23 TEST(GammaExpansionEffectTest, sRGB_RampAlwaysIncreases) {
  24         float data[256], out_data[256];
  25         for (unsigned i = 0; i < 256; ++i) {
  26                 data[i] = i / 255.0f;
  27         }
  28         EffectChainTester tester(data, 256, 1, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_sRGB);
  29         tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
  30
  31         for (unsigned i = 1; i < 256; ++i) {
  32                 EXPECT_GT(out_data[i], out_data[i - 1])
  33                    << "No increase between " << i-1 << " and " << i;
  34         }
  35 }
  36
  37 TEST(GammaExpansionEffectTest, sRGB_AlphaIsUnchanged) {
  38         float data[] = {
  39                 0.0f, 0.0f, 0.0f, 0.0f,
  40                 0.0f, 0.0f, 0.0f, 0.25f,
  41                 0.0f, 0.0f, 0.0f, 0.5f,
  42                 0.0f, 0.0f, 0.0f, 0.75f,
  43                 0.0f, 0.0f, 0.0f, 1.0f,
  44         };
  45         float out_data[5 * 4];
  46         EffectChainTester tester(data, 5, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_sRGB);
  47         tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
  48
  49         expect_equal(data, out_data, 5, 1);
  50 }
  51
  52 TEST(GammaExpansionEffectTest, Rec709_KeyValues) {
  53         float data[] = {
  54                 0.0f, 1.0f,
  55                 0.080f, 0.082f,  // On either side of the discontinuity.
  56         };
  57         float expected_data[] = {
  58                 0.0f, 1.0f,
  59                 0.017778f, 0.018167f,
  60         };
  61         float out_data[4];
  62         EffectChainTester tester(data, 2, 2, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_REC_709);
  63         tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
  64
  65         expect_equal(expected_data, out_data, 2, 2);
  66 }
  67
  68 TEST(GammaExpansionEffectTest, Rec709_RampAlwaysIncreases) {
  69         float data[256], out_data[256];
  70         for (unsigned i = 0; i < 256; ++i) {
  71                 data[i] = i / 255.0f;
  72         }
  73         EffectChainTester tester(data, 256, 1, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_REC_709);
  74         tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
  75
  76         for (unsigned i = 1; i < 256; ++i) {
  77                 EXPECT_GT(out_data[i], out_data[i - 1])
  78                    << "No increase between " << i-1 << " and " << i;
  79         }
  80 }
  81
  82 TEST(GammaExpansionEffectTest, Rec709_AlphaIsUnchanged) {
  83         float data[] = {
  84                 0.0f, 0.0f, 0.0f, 0.0f,
  85                 0.0f, 0.0f, 0.0f, 0.25f,
  86                 0.0f, 0.0f, 0.0f, 0.5f,
  87                 0.0f, 0.0f, 0.0f, 0.75f,
  88                 0.0f, 0.0f, 0.0f, 1.0f,
  89         };
  90         float out_data[5 * 4];
  91         EffectChainTester tester(data, 5, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_REC_709);
  92         tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
  93
  94         expect_equal(data, out_data, 5, 1);
  95 }