X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=gamma_expansion_effect_test.cpp;fp=gamma_expansion_effect_test.cpp;h=0fd9a71dd57518e8b28fba15268a7690fa2754b6;hp=0000000000000000000000000000000000000000;hb=b76bbc2fce2c56aa65bb8827a3e488c5726a4a9f;hpb=62504944698295c8c48d88df124855af6874fdfe

diff --git a/gamma_expansion_effect_test.cpp b/gamma_expansion_effect_test.cpp
new file mode 100644
index 0000000..0fd9a71
--- /dev/null
+++ b/gamma_expansion_effect_test.cpp
@@ -0,0 +1,35 @@
+// Unit tests for GammaExpansionEffect.
+
+#include "test_util.h"
+#include "gtest/gtest.h"
+#include "gamma_expansion_effect.h"
+
+TEST(GammaExpansionEffectTest, sRGB_KeyValues) {
+	float data[] = {
+		0.0f, 1.0f,
+		0.040f, 0.041f,  // On either side of the discontinuity.
+	};
+	float expected_data[] = {
+		0.0f, 1.0f,
+		0.00309f, 0.00317f, 
+	};
+	float out_data[4];
+	EffectChainTester tester(data, 2, 2, COLORSPACE_sRGB, GAMMA_sRGB);
+	tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+	expect_equal(expected_data, out_data, 2, 2);
+}
+
+TEST(GammaExpansionEffectTest, sRGB_RampAlwaysIncreases) {
+	float data[256], out_data[256];
+	for (unsigned i = 0; i < 256; ++i) {
+		data[i] = i / 255.0f;
+	}
+	EffectChainTester tester(data, 256, 1, COLORSPACE_sRGB, GAMMA_sRGB);
+	tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+	for (unsigned i = 1; i < 256; ++i) {
+		EXPECT_GT(out_data[i], out_data[i - 1])
+		   << "No increase between " << i-1 << " and " << i;
+	}
+}