X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=white_balance_effect_test.cpp;fp=white_balance_effect_test.cpp;h=966cba3d9b28dabd7d25ab82a927a9dec60c65ab;hp=0000000000000000000000000000000000000000;hb=b808921f84d52f426bc7bb22480f0806668a45a1;hpb=62c039a63a8afdea4ec2da081d0173d7dd1d4578

diff --git a/white_balance_effect_test.cpp b/white_balance_effect_test.cpp
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+++ b/white_balance_effect_test.cpp
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+// Unit tests for WhiteBalanceEffect.
+
+#include "test_util.h"
+#include "gtest/gtest.h"
+#include "white_balance_effect.h"
+
+TEST(WhiteBalanceEffectTest, GrayNeutralDoesNothing) {
+	float data[] = {
+		0.0f, 0.0f, 0.0f, 1.0f,
+		0.5f, 0.5f, 0.5f, 0.3f,
+		1.0f, 0.0f, 0.0f, 1.0f,
+		0.0f, 1.0f, 0.0f, 0.7f,
+		0.0f, 0.0f, 1.0f, 1.0f,
+	};
+	float neutral[] = {
+		0.5f, 0.5f, 0.5f
+	};
+
+	float out_data[5 * 4];
+	EffectChainTester tester(data, 1, 5, FORMAT_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+	Effect *white_balance_effect = tester.get_chain()->add_effect(new WhiteBalanceEffect());
+	ASSERT_TRUE(white_balance_effect->set_vec3("neutral_color", neutral));
+	tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+	expect_equal(data, out_data, 4, 5);
+}
+
+TEST(WhiteBalanceEffectTest, SettingReddishNeutralColorNeutralizesReddishColor) {
+	float data[] = {
+		0.0f, 0.0f, 0.0f, 1.0f,
+		0.6f, 0.5f, 0.5f, 1.0f,
+		0.5f, 0.5f, 0.5f, 1.0f,
+	};
+	float neutral[] = {
+		0.6f, 0.5f, 0.5f
+	};
+
+	float out_data[3 * 4];
+	EffectChainTester tester(data, 1, 3, FORMAT_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+	Effect *white_balance_effect = tester.get_chain()->add_effect(new WhiteBalanceEffect());
+	ASSERT_TRUE(white_balance_effect->set_vec3("neutral_color", neutral));
+	tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+	// Black should stay black.
+	EXPECT_FLOAT_EQ(0.0f, out_data[4 * 0 + 0]);
+	EXPECT_FLOAT_EQ(0.0f, out_data[4 * 0 + 1]);
+	EXPECT_FLOAT_EQ(0.0f, out_data[4 * 0 + 2]);
+	EXPECT_FLOAT_EQ(1.0f, out_data[4 * 0 + 3]);
+
+	// The neutral color should now have R=G=B.
+	EXPECT_NEAR(out_data[4 * 1 + 0], out_data[4 * 1 + 1], 0.001);
+	EXPECT_NEAR(out_data[4 * 1 + 0], out_data[4 * 1 + 2], 0.001);
+	EXPECT_FLOAT_EQ(1.0f, out_data[4 * 1 + 3]);
+
+	// It should also have kept its luminance.
+	float old_luminance = 0.2126 * data[4 * 1 + 0] +
+		0.7152 * data[4 * 1 + 1] +
+		0.0722 * data[4 * 1 + 2];	
+	float new_luminance = 0.2126 * out_data[4 * 1 + 0] +
+		0.7152 * out_data[4 * 1 + 1] +
+		0.0722 * out_data[4 * 1 + 2];
+	EXPECT_NEAR(old_luminance, new_luminance, 0.001);
+
+	// Finally, the old gray should now have significantly less red than green and blue.
+	EXPECT_GT(out_data[4 * 2 + 1] - out_data[4 * 2 + 0], 0.05);
+	EXPECT_GT(out_data[4 * 2 + 2] - out_data[4 * 2 + 0], 0.05);
+}
+
+TEST(WhiteBalanceEffectTest, HigherColorTemperatureIncreasesBlue) {
+	float data[] = {
+		0.0f, 0.0f, 0.0f, 1.0f,
+		0.5f, 0.5f, 0.5f, 1.0f,
+	};
+
+	float out_data[2 * 4];
+	EffectChainTester tester(data, 1, 2, FORMAT_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+	Effect *white_balance_effect = tester.get_chain()->add_effect(new WhiteBalanceEffect());
+	ASSERT_TRUE(white_balance_effect->set_float("output_color_temperature", 10000.0f));
+	tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
+
+	// Black should stay black.
+	EXPECT_FLOAT_EQ(0.0f, out_data[4 * 0 + 0]);
+	EXPECT_FLOAT_EQ(0.0f, out_data[4 * 0 + 1]);
+	EXPECT_FLOAT_EQ(0.0f, out_data[4 * 0 + 2]);
+	EXPECT_FLOAT_EQ(1.0f, out_data[4 * 0 + 3]);
+
+	// The neutral color should have kept its luminance.
+	float old_luminance = 0.2126 * data[4 * 1 + 0] +
+		0.7152 * data[4 * 1 + 1] +
+		0.0722 * data[4 * 1 + 2];	
+	float new_luminance = 0.2126 * out_data[4 * 1 + 0] +
+		0.7152 * out_data[4 * 1 + 1] +
+		0.0722 * out_data[4 * 1 + 2];
+	EXPECT_NEAR(old_luminance, new_luminance, 0.001);
+
+	// It should also have significantly more blue then green,
+	// and significantly less red than green.
+	EXPECT_GT(out_data[4 * 1 + 2] - out_data[4 * 1 + 1], 0.05);
+	EXPECT_GT(out_data[4 * 1 + 1] - out_data[4 * 1 + 0], 0.05);
+}