X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=effect_chain_test.cpp;h=e5ca1cc1f28423c2ae8e8779695fdd3508c269e6;hb=5718299276a6966eddc2f3fb5948a6dd1bbdef90;hp=c8fd946e6717fdd523048e58005b5f68e73d0d75;hpb=8eb4f2233b58dd11d276de2db44a8841224e15f5;p=movit

diff --git a/effect_chain_test.cpp b/effect_chain_test.cpp
index c8fd946..e5ca1cc 100644
--- a/effect_chain_test.cpp
+++ b/effect_chain_test.cpp
@@ -1,109 +1,82 @@
 // Unit tests for EffectChain.
+//
+// Note that this also contains the tests for some of the simpler effects.
 
 #include "effect_chain.h"
 #include "flat_input.h"
-#include "sandbox_effect.h"
-#include "opengl.h"
 #include "gtest/gtest.h"
+#include "mirror_effect.h"
+#include "opengl.h"
+#include "test_util.h"
 
-#include <stdio.h>
-#include <math.h>
+TEST(EffectChainTest, EmptyChain) {
+	float data[] = {
+		0.0f, 0.25f, 0.3f,
+		0.75f, 1.0f, 1.0f,
+	};
+	float out_data[6];
+	EffectChainTester tester(data, 3, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
+	tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
 
-#include <algorithm>
+	expect_equal(data, out_data, 3, 2);
+}
 
-class EffectChainTester {
+// An effect that does nothing.
+class IdentityEffect : public Effect {
 public:
-	EffectChainTester(const float *data, unsigned width, unsigned height, ColorSpace color_space, GammaCurve gamma_curve)
-		: chain(width, height), width(width), height(height)
-	{
-		ImageFormat format;
-		format.color_space = color_space;
-		format.gamma_curve = gamma_curve;
-	
-		FlatInput *input = new FlatInput(format, FORMAT_GRAYSCALE, GL_FLOAT, width, height);
-		input->set_pixel_data(data);
-		chain.add_input(input);
-	}
-
-	EffectChain *get_chain() { return &chain; }
-
-	void run(float *out_data, ColorSpace color_space, GammaCurve gamma_curve)
-	{
-		ImageFormat format;
-		format.color_space = color_space;
-		format.gamma_curve = gamma_curve;
-		chain.add_output(format);
-		chain.finalize();
-
-		glViewport(0, 0, width, height);
-		chain.render_to_screen();
-
-		glReadPixels(0, 0, width, height, GL_RED, GL_FLOAT, out_data);
-
-		// Flip upside-down to compensate for different origin.
-		for (unsigned y = 0; y < height / 2; ++y) {
-			unsigned flip_y = height - y - 1;
-			for (unsigned x = 0; x < width; ++x) {
-				std::swap(out_data[y * width + x], out_data[flip_y * width + x]);
-			}
-		}
-	}
-
-private:
-	EffectChain chain;
-	unsigned width, height;
+	IdentityEffect() {}
+	virtual std::string effect_type_id() const { return "IdentityEffect"; }
+	std::string output_fragment_shader() { return read_file("identity.frag"); }
 };
 
-void expect_equal(const float *ref, const float *result, unsigned width, unsigned height)
-{
-	float largest_difference = -1.0f;
-	float squared_difference = 0.0f;
-
-	for (unsigned y = 0; y < height; ++y) {
-		for (unsigned x = 0; x < width; ++x) {
-			float diff = ref[y * width + x] - result[y * width + x];
-			largest_difference = std::max(largest_difference, fabsf(diff));
-			squared_difference += diff * diff;
-		}
-	}
-
-	const float largest_difference_limit = 1.5 / 255.0;
-	const float rms_limit = 0.5 / 255.0;
-
-	EXPECT_LT(largest_difference, largest_difference_limit);
+TEST(EffectChainTest, Identity) {
+	float data[] = {
+		0.0f, 0.25f, 0.3f,
+		0.75f, 1.0f, 1.0f,
+	};
+	float out_data[6];
+	EffectChainTester tester(data, 3, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
+	tester.get_chain()->add_effect(new IdentityEffect());
+	tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
 
-	float rms = sqrt(squared_difference) / (width * height);
-	EXPECT_LT(rms, rms_limit);
+	expect_equal(data, out_data, 3, 2);
+}
 
-	if (largest_difference >= largest_difference_limit || rms >= rms_limit) {
-		fprintf(stderr, "Dumping matrices for easier debugging, since at least one test failed.\n");
+// An effect that does nothing, but requests texture bounce.
+class BouncingIdentityEffect : public Effect {
+public:
+	BouncingIdentityEffect() {}
+	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; }
+};
 
-		fprintf(stderr, "Reference:\n");
-		for (unsigned y = 0; y < height; ++y) {
-			for (unsigned x = 0; x < width; ++x) {
-				fprintf(stderr, "%7.4f ", ref[y * width + x]);
-			}
-			fprintf(stderr, "\n");
-		}
+TEST(EffectChainTest, TextureBouncePreservesIdentity) {
+	float data[] = {
+		0.0f, 0.25f, 0.3f,
+		0.75f, 1.0f, 1.0f,
+	};
+	float out_data[6];
+	EffectChainTester tester(data, 3, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
+	tester.get_chain()->add_effect(new BouncingIdentityEffect());
+	tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
 
-		fprintf(stderr, "\nResult:\n");
-		for (unsigned y = 0; y < height; ++y) {
-			for (unsigned x = 0; x < width; ++x) {
-				fprintf(stderr, "%7.4f ", result[y * width + x]);
-			}
-			fprintf(stderr, "\n");
-		}
-	}
+	expect_equal(data, out_data, 3, 2);
 }
 
-TEST(EffectChainTest, Identity) {
+TEST(MirrorTest, BasicTest) {
 	float data[] = {
 		0.0f, 0.25f, 0.3f,
 		0.75f, 1.0f, 1.0f,
 	};
+	float expected_data[6] = {
+		0.3f, 0.25f, 0.0f,
+		1.0f, 1.0f, 0.75f,
+	};
 	float out_data[6];
 	EffectChainTester tester(data, 3, 2, COLORSPACE_sRGB, GAMMA_LINEAR);
+	tester.get_chain()->add_effect(new MirrorEffect());
 	tester.run(out_data, COLORSPACE_sRGB, GAMMA_LINEAR);
 
-	expect_equal(data, out_data, 3, 2);
+	expect_equal(expected_data, out_data, 3, 2);
 }