Clip below-zero (out-of-gamut) colors in LiftGammaGainEffect.

[movit] / lift_gamma_gain_effect_test.cpp

diff --git a/lift_gamma_gain_effect_test.cpp b/lift_gamma_gain_effect_test.cpp
index 0b63063347c582420a8710cf01ea3b4e0e92cdb7..9850ba28064ede83071c2fb8f292bc88ec359c27 100644 (file)
--- a/lift_gamma_gain_effect_test.cpp
+++ b/lift_gamma_gain_effect_test.cpp
@@ -94,3 +94,23 @@ TEST(LiftGammaGainEffectTest, Gamma22IsApproximatelysRGB) {
 
        expect_equal(data, out_data, 4, 5);
 }
+
+TEST(LiftGammaGainEffectTest, OutOfGamutColorsAreClipped) {
+       float data[] = {
+               -0.5f, 0.3f, 0.0f, 1.0f,
+                0.5f, 0.0f, 0.0f, 1.0f,
+                0.0f, 1.5f, 0.5f, 0.3f,
+       };
+       float expected_data[] = {
+                0.0f, 0.3f, 0.0f, 1.0f,  // Clipped to zero.
+                0.5f, 0.0f, 0.0f, 1.0f,
+                0.0f, 1.5f, 0.5f, 0.3f,
+       };
+
+       float out_data[3 * 4];
+       EffectChainTester tester(data, 1, 3, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_LINEAR);
+       tester.get_chain()->add_effect(new LiftGammaGainEffect());
+       tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+       expect_equal(expected_data, out_data, 4, 3);
+}