X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=effect_chain_test.cpp;h=2ae38ddf6aa1ea451abc471ff622f35e01950919;hp=585df22dab23c10915b772d1287d436a5ce9cd92;hb=f2841411054c60e47181136aafc86b9982bf573e;hpb=807c97809f0e7a11d1af600d562d8841370e7250;ds=sidebyside

diff --git a/effect_chain_test.cpp b/effect_chain_test.cpp
index 585df22..2ae38dd 100644
--- a/effect_chain_test.cpp
+++ b/effect_chain_test.cpp
@@ -204,3 +204,131 @@ TEST(EffectChainTest, IdentityThroughRec709) {
 
 	expect_equal(data, out_data, 256, 1);
 }
+
+// Effectively scales down its input linearly by 4x (and repeating it),
+// which is not attainable without mipmaps.
+class MipmapNeedingEffect : public Effect {
+public:
+	MipmapNeedingEffect() {}
+	virtual bool needs_mipmaps() const { return true; }
+	virtual std::string effect_type_id() const { return "MipmapNeedingEffect"; }
+	std::string output_fragment_shader() { return read_file("mipmap_needing_effect.frag"); }
+	void set_gl_state(GLuint glsl_program_num, const std::string& prefix, unsigned *sampler_num)
+	{
+		glActiveTexture(GL_TEXTURE0);
+		check_error();
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+		check_error();
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+		check_error();
+	}
+};
+
+TEST(EffectChainTest, MipmapGenerationWorks) {
+	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 each way.
+		0.125f,   0.125f,   0.125f,   0.125f,
+		0.09375f, 0.09375f, 0.09375f, 0.09375f,
+		1.0f,     1.0f,     1.0f,     1.0f,
+		0.25f,    0.25f,    0.25f,    0.25f,
+
+		0.125f,   0.125f,   0.125f,   0.125f,
+		0.09375f, 0.09375f, 0.09375f, 0.09375f,
+		1.0f,     1.0f,     1.0f,     1.0f,
+		0.25f,    0.25f,    0.25f,    0.25f,
+
+		0.125f,   0.125f,   0.125f,   0.125f,
+		0.09375f, 0.09375f, 0.09375f, 0.09375f,
+		1.0f,     1.0f,     1.0f,     1.0f,
+		0.25f,    0.25f,    0.25f,    0.25f,
+
+		0.125f,   0.125f,   0.125f,   0.125f,
+		0.09375f, 0.09375f, 0.09375f, 0.09375f,
+		1.0f,     1.0f,     1.0f,     1.0f,
+		0.25f,    0.25f,    0.25f,    0.25f,
+	};
+	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);
+}