// Pretty much the inverse of the GammaExpansionEffect tests;
// EffectChainTest tests that they are actually inverses.
-#include "test_util.h"
+#include <GL/glew.h>
#include "gtest/gtest.h"
-#include "gamma_expansion_effect.h"
+#include "image_format.h"
+#include "test_util.h"
TEST(GammaCompressionEffectTest, sRGB_KeyValues) {
float data[] = {
0.040f, 0.041f,
};
float out_data[4];
- EffectChainTester tester(data, 2, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
- tester.run(out_data, COLORSPACE_sRGB, GAMMA_sRGB);
+ EffectChainTester tester(data, 2, 2, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
expect_equal(expected_data, out_data, 2, 2);
}
for (unsigned i = 0; i < 256; ++i) {
data[i] = i / 255.0f;
}
- EffectChainTester tester(data, 256, 1, COLORSPACE_sRGB, GAMMA_LINEAR);
- tester.run(out_data, COLORSPACE_sRGB, GAMMA_sRGB);
+ EffectChainTester tester(data, 256, 1, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
for (unsigned i = 1; i < 256; ++i) {
EXPECT_GT(out_data[i], out_data[i - 1])
0.080f, 0.082f,
};
float out_data[4];
- EffectChainTester tester(data, 2, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
- tester.run(out_data, COLORSPACE_sRGB, GAMMA_REC_709);
+ EffectChainTester tester(data, 2, 2, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_REC_709);
expect_equal(expected_data, out_data, 2, 2);
}
for (unsigned i = 0; i < 256; ++i) {
data[i] = i / 255.0f;
}
- EffectChainTester tester(data, 256, 1, COLORSPACE_sRGB, GAMMA_LINEAR);
- tester.run(out_data, COLORSPACE_sRGB, GAMMA_REC_709);
+ EffectChainTester tester(data, 256, 1, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_REC_709);
for (unsigned i = 1; i < 256; ++i) {
EXPECT_GT(out_data[i], out_data[i - 1])
<< "No increase between " << i-1 << " and " << i;
}
}
+
+TEST(GammaCompressionEffectTest, Rec2020_12BitIsVeryCloseToRec709) {
+ float data[256];
+ for (unsigned i = 0; i < 256; ++i) {
+ data[i] = i / 255.0f;
+ }
+ float out_data_709[256];
+ float out_data_2020[256];
+
+ EffectChainTester tester(data, 256, 1, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester.run(out_data_709, GL_RED, COLORSPACE_sRGB, GAMMA_REC_709);
+ EffectChainTester tester2(data, 256, 1, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+ tester2.run(out_data_2020, GL_RED, COLORSPACE_sRGB, GAMMA_REC_2020_12_BIT);
+
+ double sqdiff = 0.0;
+ for (unsigned i = 0; i < 256; ++i) {
+ EXPECT_NEAR(out_data_709[i], out_data_2020[i], 1e-3);
+ sqdiff += (out_data_709[i] - out_data_2020[i]) * (out_data_709[i] - out_data_2020[i]);
+ }
+ EXPECT_GT(sqdiff, 1e-6);
+}