Fix another issue where an input was used twice. Add unit tests, again.

[movit] / effect_chain_test.cpp

diff --git a/effect_chain_test.cpp b/effect_chain_test.cpp
index ce3870a5b166caca74ccfa589d013805f7e28f8b..e78a140270a2f81265959f492200c7edf7746a0d 100644 (file)
--- a/effect_chain_test.cpp
+++ b/effect_chain_test.cpp
@@ -51,6 +51,7 @@ public:
        virtual std::string effect_type_id() const { return "IdentityEffect"; }
        std::string output_fragment_shader() { return read_file("identity.frag"); }
        bool needs_texture_bounce() const { return true; }
+       AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
 };
 
 TEST(EffectChainTest, TextureBouncePreservesIdentity) {
@@ -640,3 +641,52 @@ TEST(EffectChainTest, DiamondGraph) {
 
        expect_equal(expected_data, out_data, 2, 2);
 }
+
+// Constructs the graph
+//
+//             FlatInput                     |
+//            /         \                    |
+//  MultiplyEffect  MultiplyEffect           |
+//         \             |                   |
+//          \    BouncingIdentityEffect      |  
+//            \         /                    |
+//             AddEffect                     |
+//
+// and verifies that it gives the correct output.
+TEST(EffectChainTest, DiamondGraphWithOneInputUsedInTwoPhases) {
+       float data[] = {
+               1.0f, 1.0f,
+               1.0f, 0.0f,
+       };
+       float expected_data[] = {
+               2.5f, 2.5f,
+               2.5f, 0.0f,
+       };
+       float out_data[2 * 2];
+
+       MultiplyEffect *mul_half = new MultiplyEffect();
+       ASSERT_TRUE(mul_half->set_float("factor", 0.5f));
+       
+       MultiplyEffect *mul_two = new MultiplyEffect();
+       ASSERT_TRUE(mul_two->set_float("factor", 2.0f));
+       
+       BouncingIdentityEffect *bounce = new BouncingIdentityEffect();
+
+       EffectChainTester tester(NULL, 2, 2);
+
+       ImageFormat format;
+       format.color_space = COLORSPACE_sRGB;
+       format.gamma_curve = GAMMA_LINEAR;
+
+       FlatInput *input = new FlatInput(format, FORMAT_GRAYSCALE, GL_FLOAT, 2, 2);
+       input->set_pixel_data(data);
+
+       tester.get_chain()->add_input(input);
+       tester.get_chain()->add_effect(mul_half, input);
+       tester.get_chain()->add_effect(mul_two, input);
+       tester.get_chain()->add_effect(bounce, mul_two);
+       tester.get_chain()->add_effect(new AddEffect(), mul_half, bounce);
+       tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+       expect_equal(expected_data, out_data, 2, 2);
+}