1 // Unit tests for SaturationEffect.
5 #include "effect_chain.h"
6 #include "gtest/gtest.h"
7 #include "image_format.h"
8 #include "saturation_effect.h"
13 TEST(SaturationEffectTest, SaturationOneIsPassThrough) {
15 1.0f, 0.5f, 0.75f, 0.6f,
18 EffectChainTester tester(data, 1, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
19 Effect *saturation_effect = tester.get_chain()->add_effect(new SaturationEffect());
20 ASSERT_TRUE(saturation_effect->set_float("saturation", 1.0f));
21 tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
23 expect_equal(data, out_data, 1, 1);
26 TEST(SaturationEffectTest, SaturationZeroRemovesColorButPreservesAlpha) {
28 0.0f, 0.0f, 0.0f, 1.0f,
29 0.5f, 0.5f, 0.5f, 0.3f,
30 1.0f, 0.0f, 0.0f, 1.0f,
31 0.0f, 1.0f, 0.0f, 0.7f,
32 0.0f, 0.0f, 1.0f, 1.0f,
34 float expected_data[] = {
35 0.0f, 0.0f, 0.0f, 1.0f,
36 0.5f, 0.5f, 0.5f, 0.3f,
37 0.2126f, 0.2126f, 0.2126f, 1.0f,
38 0.7152f, 0.7152f, 0.7152f, 0.7f,
39 0.0722f, 0.0722f, 0.0722f, 1.0f,
42 float out_data[5 * 4];
43 EffectChainTester tester(data, 5, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
44 Effect *saturation_effect = tester.get_chain()->add_effect(new SaturationEffect());
45 ASSERT_TRUE(saturation_effect->set_float("saturation", 0.0f));
46 tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
48 expect_equal(expected_data, out_data, 4, 5);
51 TEST(SaturationEffectTest, DoubleSaturation) {
53 0.0f, 0.0f, 0.0f, 1.0f,
54 0.5f, 0.5f, 0.5f, 0.3f,
55 0.3f, 0.1f, 0.1f, 1.0f,
57 float expected_data[] = {
58 0.0f, 0.0f, 0.0f, 1.0f,
59 0.5f, 0.5f, 0.5f, 0.3f,
60 0.4570f, 0.0575f, 0.0575f, 1.0f,
63 float out_data[3 * 4];
64 EffectChainTester tester(data, 3, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
65 Effect *saturation_effect = tester.get_chain()->add_effect(new SaturationEffect());
66 ASSERT_TRUE(saturation_effect->set_float("saturation", 2.0f));
67 tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
69 expect_equal(expected_data, out_data, 4, 3);