git.sesse.net Git - movit/blob - 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, ColorSpace color_space, GammaCurve gamma_curve)
  11         : chain(width, height), width(width), height(height)
  12 {
  13         add_input(data, 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, 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, FORMAT_GRAYSCALE, 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, ColorSpace color_space, GammaCurve gamma_curve)
  50 {
  51         ImageFormat format;
  52         format.color_space = color_space;
  53         format.gamma_curve = gamma_curve;
  54         chain.add_output(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, GL_RED, 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)
  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         const float largest_difference_limit = 1.5 / 255.0;
  85         const float rms_limit = 0.5 / 255.0;
  86
  87         EXPECT_LT(largest_difference, largest_difference_limit);
  88
  89         float rms = sqrt(squared_difference) / (width * height);
  90         EXPECT_LT(rms, rms_limit);
  91
  92         if (largest_difference >= largest_difference_limit || rms >= rms_limit) {
  93                 fprintf(stderr, "Dumping matrices for easier debugging, since at least one test failed.\n");
  94
  95                 fprintf(stderr, "Reference:\n");
  96                 for (unsigned y = 0; y < height; ++y) {
  97                         for (unsigned x = 0; x < width; ++x) {
  98                                 fprintf(stderr, "%7.4f ", ref[y * width + x]);
  99                         }
 100                         fprintf(stderr, "\n");
 101                 }
 102
 103                 fprintf(stderr, "\nResult:\n");
 104                 for (unsigned y = 0; y < height; ++y) {
 105                         for (unsigned x = 0; x < width; ++x) {
 106                                 fprintf(stderr, "%7.4f ", result[y * width + x]);
 107                         }
 108                         fprintf(stderr, "\n");
 109                 }
 110         }
 111 }