Add a test that verifies resizing works. Incidentially, it is the first test that...

diff --git a/effect_chain_test.cpp b/effect_chain_test.cpp
index ca208da50cac7acaa54742357204e3c6b9fc6ec8..2ae38ddf6aa1ea451abc471ff622f35e01950919 100644 (file)
--- a/effect_chain_test.cpp
+++ b/effect_chain_test.cpp
@@ -267,10 +267,68 @@ TEST(EffectChainTest, MipmapGenerationWorks) {
                1.0f,     1.0f,     1.0f,     1.0f,
                0.25f,    0.25f,    0.25f,    0.25f,
        };
-       float out_data[16 * 4];
+       float out_data[4 * 16];
        EffectChainTester tester(data, 4, 16, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
        tester.get_chain()->add_effect(new MipmapNeedingEffect());
        tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
 
        expect_equal(expected_data, out_data, 4, 16);
 }
+
+TEST(EffectChainTest, ResizeDownByFourThenUpByFour) {
+       float data[] = {  // In 4x4 blocks.
+               1.0f, 0.0f, 0.0f, 0.0f,
+               0.0f, 0.0f, 0.0f, 0.0f,
+               0.0f, 0.0f, 0.0f, 0.0f,
+               0.0f, 0.0f, 0.0f, 1.0f,
+
+               0.0f, 0.0f, 0.0f, 0.0f,
+               0.0f, 0.5f, 0.0f, 0.0f,
+               0.0f, 0.0f, 1.0f, 0.0f,
+               0.0f, 0.0f, 0.0f, 0.0f,
+
+               1.0f, 1.0f, 1.0f, 1.0f,
+               1.0f, 1.0f, 1.0f, 1.0f,
+               1.0f, 1.0f, 1.0f, 1.0f,
+               1.0f, 1.0f, 1.0f, 1.0f,
+
+               0.0f, 0.0f, 0.0f, 0.0f,
+               0.0f, 1.0f, 1.0f, 0.0f,
+               0.0f, 1.0f, 1.0f, 0.0f,
+               0.0f, 0.0f, 0.0f, 0.0f,
+       };
+       float expected_data[] = {  // Repeated four times horizontaly, interpolated vertically.
+               0.1250f, 0.1250f, 0.1250f, 0.1250f,
+               0.1250f, 0.1250f, 0.1250f, 0.1250f,
+               0.1211f, 0.1211f, 0.1211f, 0.1211f,
+               0.1133f, 0.1133f, 0.1133f, 0.1133f,
+               0.1055f, 0.1055f, 0.1055f, 0.1055f,
+               0.0977f, 0.0977f, 0.0977f, 0.0977f,
+               0.2070f, 0.2070f, 0.2070f, 0.2070f,
+               0.4336f, 0.4336f, 0.4336f, 0.4336f,
+               0.6602f, 0.6602f, 0.6602f, 0.6602f,
+               0.8867f, 0.8867f, 0.8867f, 0.8867f,
+               0.9062f, 0.9062f, 0.9062f, 0.9062f,
+               0.7188f, 0.7188f, 0.7188f, 0.7188f,
+               0.5312f, 0.5312f, 0.5312f, 0.5312f,
+               0.3438f, 0.3438f, 0.3438f, 0.3438f,
+               0.2500f, 0.2500f, 0.2500f, 0.2500f,
+               0.2500f, 0.2500f, 0.2500f, 0.2500f,
+       };
+       float out_data[4 * 16];
+
+       ResizeEffect *downscale = new ResizeEffect();
+       ASSERT_TRUE(downscale->set_int("width", 1));
+       ASSERT_TRUE(downscale->set_int("height", 4));
+
+       ResizeEffect *upscale = new ResizeEffect();
+       ASSERT_TRUE(upscale->set_int("width", 4));
+       ASSERT_TRUE(upscale->set_int("height", 16));
+
+       EffectChainTester tester(data, 4, 16, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR);
+       tester.get_chain()->add_effect(downscale);
+       tester.get_chain()->add_effect(upscale);
+       tester.run(out_data, GL_RED, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+       expect_equal(expected_data, out_data, 4, 16);
+}