Implement GammaExpansionEffect using ALU ops instead of texture lookups.
[movit] / saturation_effect_test.cpp
1 // Unit tests for SaturationEffect.
2
3 #include <GL/glew.h>
4
5 #include "effect_chain.h"
6 #include "gtest/gtest.h"
7 #include "image_format.h"
8 #include "saturation_effect.h"
9 #include "test_util.h"
10
11 TEST(SaturationEffectTest, SaturationOneIsPassThrough) {
12         float data[] = {
13                 1.0f, 0.5f, 0.75f, 0.6f,
14         };
15         float out_data[4];
16         EffectChainTester tester(data, 1, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
17         Effect *saturation_effect = tester.get_chain()->add_effect(new SaturationEffect());
18         ASSERT_TRUE(saturation_effect->set_float("saturation", 1.0f));
19         tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
20
21         expect_equal(data, out_data, 1, 1);
22 }
23
24 TEST(SaturationEffectTest, SaturationZeroRemovesColorButPreservesAlpha) {
25         float data[] = {
26                 0.0f, 0.0f, 0.0f, 1.0f,
27                 0.5f, 0.5f, 0.5f, 0.3f,
28                 1.0f, 0.0f, 0.0f, 1.0f,
29                 0.0f, 1.0f, 0.0f, 0.7f,
30                 0.0f, 0.0f, 1.0f, 1.0f,
31         };
32         float expected_data[] = {
33                 0.0f, 0.0f, 0.0f, 1.0f,
34                 0.5f, 0.5f, 0.5f, 0.3f,
35                 0.2126f, 0.2126f, 0.2126f, 1.0f,
36                 0.7152f, 0.7152f, 0.7152f, 0.7f,
37                 0.0722f, 0.0722f, 0.0722f, 1.0f,
38         };
39
40         float out_data[5 * 4];
41         EffectChainTester tester(data, 5, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
42         Effect *saturation_effect = tester.get_chain()->add_effect(new SaturationEffect());
43         ASSERT_TRUE(saturation_effect->set_float("saturation", 0.0f));
44         tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
45
46         expect_equal(expected_data, out_data, 4, 5);
47 }
48
49 TEST(SaturationEffectTest, DoubleSaturation) {
50         float data[] = {
51                 0.0f, 0.0f, 0.0f, 1.0f,
52                 0.5f, 0.5f, 0.5f, 0.3f,
53                 0.3f, 0.1f, 0.1f, 1.0f,
54         };
55         float expected_data[] = {
56                 0.0f, 0.0f, 0.0f, 1.0f,
57                 0.5f, 0.5f, 0.5f, 0.3f,
58                 0.4570f, 0.0575f, 0.0575f, 1.0f,
59         };
60
61         float out_data[3 * 4];
62         EffectChainTester tester(data, 3, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
63         Effect *saturation_effect = tester.get_chain()->add_effect(new SaturationEffect());
64         ASSERT_TRUE(saturation_effect->set_float("saturation", 2.0f));
65         tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
66
67         expect_equal(expected_data, out_data, 4, 3);
68 }