+
+TEST(GammaExpansionEffectTest, 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_REC_709);
+ tester.run(out_data_709, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+ EffectChainTester tester2(data, 256, 1, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_REC_2020_12_BIT);
+ tester2.run(out_data_2020, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+ 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);
+}