X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_compression_effect_test.cpp;h=e65acee34e4974b6c8a2a500a15556b5255c982e;hp=c0b4ccf141e1d58a2d456b03acedae725ac42399;hb=b912dbaa253ed1f091fd7201efd366c6f3154257;hpb=37f56fcbe571b2322243f6de59494bf9e0cbb37a

diff --git a/gamma_compression_effect_test.cpp b/gamma_compression_effect_test.cpp
index c0b4ccf..e65acee 100644
--- a/gamma_compression_effect_test.cpp
+++ b/gamma_compression_effect_test.cpp
@@ -67,3 +67,24 @@ TEST(GammaCompressionEffectTest, Rec709_RampAlwaysIncreases) {
 		   << "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);
+}