1 // Unit tests for LiftGammaGainEffect.
5 #include "effect_chain.h"
6 #include "gtest/gtest.h"
7 #include "image_format.h"
8 #include "lift_gamma_gain_effect.h"
11 TEST(LiftGammaGainEffectTest, DefaultIsNoop) {
13 0.0f, 0.0f, 0.0f, 1.0f,
14 0.5f, 0.5f, 0.5f, 0.3f,
15 1.0f, 0.0f, 0.0f, 1.0f,
16 0.0f, 1.0f, 0.0f, 0.7f,
17 0.0f, 0.0f, 1.0f, 1.0f,
20 float out_data[5 * 4];
21 EffectChainTester tester(data, 1, 5, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
22 tester.get_chain()->add_effect(new LiftGammaGainEffect());
23 tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
25 expect_equal(data, out_data, 4, 5);
28 TEST(LiftGammaGainEffectTest, Gain) {
30 0.0f, 0.0f, 0.0f, 1.0f,
31 0.5f, 0.5f, 0.5f, 0.3f,
32 1.0f, 0.0f, 0.0f, 1.0f,
33 0.0f, 1.0f, 0.0f, 0.7f,
34 0.0f, 0.0f, 1.0f, 1.0f,
36 float gain[3] = { 0.8f, 1.0f, 1.2f };
37 float expected_data[] = {
38 0.0f, 0.0f, 0.0f, 1.0f,
39 0.4f, 0.5f, 0.6f, 0.3f,
40 0.8f, 0.0f, 0.0f, 1.0f,
41 0.0f, 1.0f, 0.0f, 0.7f,
42 0.0f, 0.0f, 1.2f, 1.0f,
45 float out_data[5 * 4];
46 EffectChainTester tester(data, 1, 5, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
47 Effect *lgg_effect = tester.get_chain()->add_effect(new LiftGammaGainEffect());
48 ASSERT_TRUE(lgg_effect->set_vec3("gain", gain));
49 tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
51 expect_equal(expected_data, out_data, 4, 5);
54 TEST(LiftGammaGainEffectTest, LiftIsDoneInApproximatelysRGB) {
56 0.0f, 0.0f, 0.0f, 1.0f,
57 0.5f, 0.5f, 0.5f, 0.3f,
58 1.0f, 0.0f, 0.0f, 1.0f,
59 0.0f, 1.0f, 0.0f, 0.7f,
60 0.0f, 0.0f, 1.0f, 1.0f,
62 float lift[3] = { 0.0f, 0.1f, 0.2f };
63 float expected_data[] = {
64 0.0f, 0.1f , 0.2f, 1.0f,
65 0.5f, 0.55f, 0.6f, 0.3f,
66 1.0f, 0.1f, 0.2f, 1.0f,
67 0.0f, 1.0f, 0.2f, 0.7f,
68 0.0f, 0.1f, 1.0f, 1.0f,
71 float out_data[5 * 4];
72 EffectChainTester tester(data, 1, 5, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_sRGB);
73 Effect *lgg_effect = tester.get_chain()->add_effect(new LiftGammaGainEffect());
74 ASSERT_TRUE(lgg_effect->set_vec3("lift", lift));
75 tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_sRGB);
77 // sRGB is only approximately gamma-2.2, so loosen up the limits a bit.
78 expect_equal(expected_data, out_data, 4, 5, 0.03, 0.003);
81 TEST(LiftGammaGainEffectTest, Gamma22IsApproximatelysRGB) {
83 0.0f, 0.0f, 0.0f, 1.0f,
84 0.5f, 0.5f, 0.5f, 0.3f,
85 1.0f, 0.0f, 0.0f, 1.0f,
86 0.0f, 1.0f, 0.0f, 0.7f,
87 0.0f, 0.0f, 1.0f, 1.0f,
89 float gamma[3] = { 2.2f, 2.2f, 2.2f };
91 float out_data[5 * 4];
92 EffectChainTester tester(data, 1, 5, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_sRGB);
93 Effect *lgg_effect = tester.get_chain()->add_effect(new LiftGammaGainEffect());
94 ASSERT_TRUE(lgg_effect->set_vec3("gamma", gamma));
95 tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
97 expect_equal(data, out_data, 4, 5);
100 TEST(LiftGammaGainEffectTest, OutOfGamutColorsAreClipped) {
102 -0.5f, 0.3f, 0.0f, 1.0f,
103 0.5f, 0.0f, 0.0f, 1.0f,
104 0.0f, 1.5f, 0.5f, 0.3f,
106 float expected_data[] = {
107 0.0f, 0.3f, 0.0f, 1.0f, // Clipped to zero.
108 0.5f, 0.0f, 0.0f, 1.0f,
109 0.0f, 1.5f, 0.5f, 0.3f,
112 float out_data[3 * 4];
113 EffectChainTester tester(data, 1, 3, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
114 tester.get_chain()->add_effect(new LiftGammaGainEffect());
115 tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
117 expect_equal(expected_data, out_data, 4, 3);