In ResampleEffect, precompute the Lanczos function into a table.

[movit] / luma_mix_effect_test.cpp

diff --git a/luma_mix_effect_test.cpp b/luma_mix_effect_test.cpp
index 4a506f5aaf4942d631aba27c4b18d99f3089d16f..2b6de1572909a216434eb6e14ce5b76635733c85 100644 (file)
--- a/luma_mix_effect_test.cpp
+++ b/luma_mix_effect_test.cpp
@@ -96,4 +96,44 @@ TEST(LumaMixEffectTest, SoftWipeHalfWayThrough) {
        expect_equal(expected_data, out_data, 2, 2);
 }
 
        expect_equal(expected_data, out_data, 2, 2);
 }
 

+TEST(LumaMixEffectTest, Inverse) {
+       float data_a[] = {
+               0.0f, 0.25f,
+               0.75f, 1.0f,
+       };
+       float data_b[] = {
+               1.0f, 0.5f,
+               0.65f, 0.6f,
+       };
+       float data_luma[] = {
+               0.0f, 0.25f,
+               0.5f, 0.75f,
+       };
+
+       EffectChainTester tester(data_a, 2, 2, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+       Effect *input1 = tester.get_chain()->last_added_effect();
+       Effect *input2 = tester.add_input(data_b, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+       Effect *input3 = tester.add_input(data_luma, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+       Effect *luma_mix_effect = tester.get_chain()->add_effect(new LumaMixEffect(), input1, input2, input3);
+       ASSERT_TRUE(luma_mix_effect->set_float("transition_width", 100000.0f));
+       ASSERT_TRUE(luma_mix_effect->set_int("inverse", 1));
+
+       // Inverse is not the same as reverse, so progress=0 should behave identically
+       // as HardWipe, ie. everything should be from A.
+       float out_data[4];
+       ASSERT_TRUE(luma_mix_effect->set_float("progress", 0.0f));
+       tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+       expect_equal(data_a, out_data, 2, 2);
+
+       // Lower two from A, the rest from B.
+       float expected_data_049[] = {
+               1.0f, 0.5f,
+               0.75f, 1.0f,
+       };
+       ASSERT_TRUE(luma_mix_effect->set_float("progress", 0.49f));
+       tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+       expect_equal(expected_data_049, out_data, 2, 2);
+}
+

 }  // namespace movit
 }  // namespace movit