// Unit tests for ResampleEffect.
-#include <GL/glew.h>
+#include <epoxy/gl.h>
+#include <gtest/gtest.h>
#include <math.h>
#include "effect_chain.h"
#include "flat_input.h"
-#include "glew.h"
-#include "gtest/gtest.h"
#include "image_format.h"
#include "resample_effect.h"
#include "test_util.h"
+namespace movit {
+
namespace {
float sinc(float x)
}
TEST(ResampleEffectTest, HeavyResampleGetsSumRight) {
- const int swidth = 1280, sheight = 720;
- const int dwidth = 36, dheight = 20;
+ // Do only one resample pass, more specifically the last one, which goes to
+ // our fp32 output. This allows us to analyze the precision without intermediate
+ // fp16 rounding.
+ const int swidth = 1, sheight = 1280;
+ const int dwidth = 1, dheight = 64;
float data[swidth * sheight], out_data[dwidth * dheight], expected_data[dwidth * dheight];
for (int y = 0; y < sheight; ++y) {
for (int x = 0; x < swidth; ++x) {
- data[y * swidth + x] = 0.5f;
+ data[y * swidth + x] = 1.0f;
}
}
for (int y = 0; y < dheight; ++y) {
for (int x = 0; x < dwidth; ++x) {
- expected_data[y * dwidth + x] = 0.5f;
+ expected_data[y * dwidth + x] = 1.0f;
}
}
- EffectChainTester tester(NULL, dwidth, dheight, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ EffectChainTester tester(NULL, dwidth, dheight, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR, GL_RGBA32F);
ImageFormat format;
format.color_space = COLORSPACE_sRGB;
ASSERT_TRUE(resample_effect->set_int("height", dheight));
tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
- expect_equal(expected_data, out_data, dwidth, dheight, 0.001);
+ // Require that we are within 10-bit accuracy. Note that this limit is for
+ // one pass only, but the limit is tight enough that it should be good enough
+ // for 10-bit accuracy even after two passes.
+ expect_equal(expected_data, out_data, dwidth, dheight, 0.1 / 1023.0);
}
+} // namespace movit