aa9cf5651aced8ef9f29e99c2ba3a093d565d3d2
[movit] / test_util.cpp
1 #include "test_util.h"
2 #include "flat_input.h"
3 #include "gtest/gtest.h"
4
5 #include <stdio.h>
6 #include <math.h>
7
8 #include <algorithm>
9
10 EffectChainTester::EffectChainTester(const float *data, unsigned width, unsigned height, MovitPixelFormat pixel_format, ColorSpace color_space, GammaCurve gamma_curve)
11         : chain(width, height), width(width), height(height)
12 {
13         add_input(data, pixel_format, color_space, gamma_curve);
14
15         glGenTextures(1, &texnum);
16         check_error();
17         glBindTexture(GL_TEXTURE_2D, texnum);
18         check_error();
19         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
20         check_error();
21
22         glGenFramebuffers(1, &fbo);
23         check_error();
24         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
25         check_error();
26         glFramebufferTexture2D(
27                 GL_FRAMEBUFFER,
28                 GL_COLOR_ATTACHMENT0,
29                 GL_TEXTURE_2D,
30                 texnum,
31                 0);
32         check_error();
33         glBindFramebuffer(GL_FRAMEBUFFER, 0);
34         check_error();
35 }
36
37 Input *EffectChainTester::add_input(const float *data, MovitPixelFormat pixel_format, ColorSpace color_space, GammaCurve gamma_curve)
38 {
39         ImageFormat format;
40         format.color_space = color_space;
41         format.gamma_curve = gamma_curve;
42
43         FlatInput *input = new FlatInput(format, pixel_format, GL_FLOAT, width, height);
44         input->set_pixel_data(data);
45         chain.add_input(input);
46         return input;
47 }
48
49 void EffectChainTester::run(float *out_data, GLenum format, ColorSpace color_space, GammaCurve gamma_curve)
50 {
51         ImageFormat image_format;
52         image_format.color_space = color_space;
53         image_format.gamma_curve = gamma_curve;
54         chain.add_output(image_format);
55         chain.finalize();
56
57         chain.render_to_fbo(fbo, width, height);
58
59         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
60         glReadPixels(0, 0, width, height, format, GL_FLOAT, out_data);
61
62         // Flip upside-down to compensate for different origin.
63         for (unsigned y = 0; y < height / 2; ++y) {
64                 unsigned flip_y = height - y - 1;
65                 for (unsigned x = 0; x < width; ++x) {
66                         std::swap(out_data[y * width + x], out_data[flip_y * width + x]);
67                 }
68         }
69 }
70
71 void expect_equal(const float *ref, const float *result, unsigned width, unsigned height, float largest_difference_limit, float rms_limit)
72 {
73         float largest_difference = -1.0f;
74         float squared_difference = 0.0f;
75
76         for (unsigned y = 0; y < height; ++y) {
77                 for (unsigned x = 0; x < width; ++x) {
78                         float diff = ref[y * width + x] - result[y * width + x];
79                         largest_difference = std::max(largest_difference, fabsf(diff));
80                         squared_difference += diff * diff;
81                 }
82         }
83
84         EXPECT_LT(largest_difference, largest_difference_limit);
85
86         float rms = sqrt(squared_difference) / (width * height);
87         EXPECT_LT(rms, rms_limit);
88
89         if (largest_difference >= largest_difference_limit || rms >= rms_limit) {
90                 fprintf(stderr, "Dumping matrices for easier debugging, since at least one test failed.\n");
91
92                 fprintf(stderr, "Reference:\n");
93                 for (unsigned y = 0; y < height; ++y) {
94                         for (unsigned x = 0; x < width; ++x) {
95                                 fprintf(stderr, "%7.4f ", ref[y * width + x]);
96                         }
97                         fprintf(stderr, "\n");
98                 }
99
100                 fprintf(stderr, "\nResult:\n");
101                 for (unsigned y = 0; y < height; ++y) {
102                         for (unsigned x = 0; x < width; ++x) {
103                                 fprintf(stderr, "%7.4f ", result[y * width + x]);
104                         }
105                         fprintf(stderr, "\n");
106                 }
107         }
108 }