1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
// Unit tests for OverlayEffect.
#include <epoxy/gl.h>
#include "effect_chain.h"
#include "gtest/gtest.h"
#include "image_format.h"
#include "input.h"
#include "overlay_effect.h"
#include "test_util.h"
#include "util.h"
namespace movit {
TEST(OverlayEffectTest, TopDominatesBottomWhenNoAlpha) {
for (int swap_inputs = 0; swap_inputs < 2; ++swap_inputs) { // false, true.
float data_a[] = {
0.0f, 0.25f,
0.75f, 1.0f,
};
float data_b[] = {
1.0f, 0.5f,
0.75f, 0.6f,
};
float out_data[4];
EffectChainTester tester(data_a, 2, 2, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
Effect *input1 = tester.get_chain()->last_added_effect();
Effect *input2 = tester.add_input(data_b, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
OverlayEffect *effect = new OverlayEffect();
CHECK(effect->set_int("swap_inputs", swap_inputs));
tester.get_chain()->add_effect(effect, input1, input2);
tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
if (swap_inputs) {
expect_equal(data_a, out_data, 2, 2);
} else {
expect_equal(data_b, out_data, 2, 2);
}
}
}
TEST(OverlayEffectTest, BottomDominatesTopWhenTopIsTransparent) {
float data_a[] = {
1.0f, 0.0f, 0.0f, 0.5f,
};
float data_b[] = {
0.5f, 0.5f, 0.5f, 0.0f,
};
float out_data[4];
EffectChainTester tester(data_a, 1, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
Effect *input1 = tester.get_chain()->last_added_effect();
Effect *input2 = tester.add_input(data_b, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
tester.get_chain()->add_effect(new OverlayEffect(), input1, input2);
tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
expect_equal(data_a, out_data, 4, 1);
}
TEST(OverlayEffectTest, ZeroAlphaRemainsZeroAlpha) {
float data_a[] = {
0.0f, 0.25f, 0.5f, 0.0f
};
float data_b[] = {
1.0f, 1.0f, 1.0f, 0.0f
};
float expected_data[] = {
0.0f, 0.0f, 0.0f, 0.0f
};
float out_data[4];
EffectChainTester tester(data_a, 1, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
Effect *input1 = tester.get_chain()->last_added_effect();
Effect *input2 = tester.add_input(data_b, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
tester.get_chain()->add_effect(new OverlayEffect(), input1, input2);
tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
EXPECT_FLOAT_EQ(0.0f, expected_data[3]);
}
// This is tested against what Photoshop does: (255,0,128, 0.25) over (128,255,0, 0.5)
// becomes (179,153,51, 0.63). (Actually we fudge 0.63 to 0.625, because that's
// what it should be.)
TEST(OverlayEffectTest, PhotoshopReferenceTest) {
float data_a[] = {
128.0f/255.0f, 1.0f, 0.0f, 0.5f
};
float data_b[] = {
1.0f, 0.0f, 128.0f/255.0f, 0.25f
};
float expected_data[] = {
179.0f/255.0f, 153.0f/255.0f, 51.0f/255.0f, 0.625f
};
float out_data[4];
EffectChainTester tester(data_a, 1, 1, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
Effect *input1 = tester.get_chain()->last_added_effect();
Effect *input2 = tester.add_input(data_b, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
tester.get_chain()->add_effect(new OverlayEffect(), input1, input2);
tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
expect_equal(expected_data, out_data, 4, 1);
}
} // namespace movit
|
