Differential D10978 Diff 36215 source/blender/blenlib/tests/BLI_color_test.cc

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source/blender/blenlib/tests/BLI_color_test.cc

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				/* Apache License, Version 2.0 */

				#include "testing/testing.h"

				#include "BLI_color.hh"

				namespace blender::tests {

				/**
				* \name Conversions
				* \{ */

				TEST(color, SrgbStraightByteToFloat)
				{
				Color4b<Srgb, eAlpha::Straight> srgb_byte(192, 128, 64, 128);
				Color4f<Srgb, eAlpha::Straight> srgb_float(srgb_byte);
				EXPECT_NEAR(0.75f, srgb_float.r, 0.01f);
				EXPECT_NEAR(0.5f, srgb_float.g, 0.01f);
				EXPECT_NEAR(0.25f, srgb_float.b, 0.01f);
				EXPECT_NEAR(0.5f, srgb_float.a, 0.01f);
				}

				TEST(color, SrgbStraightFloatToByte)
				{
				Color4f<Srgb, eAlpha::Straight> srgb_float(0.75f, 0.5f, 0.25f, 0.5f);
				Color4b<Srgb, eAlpha::Straight> srgb_byte(srgb_float);
				EXPECT_EQ(191, srgb_byte.r);
				EXPECT_EQ(128, srgb_byte.g);
				EXPECT_EQ(64, srgb_byte.b);
				EXPECT_EQ(128, srgb_byte.a);
				}

				TEST(color, SrgbStraightToLinearStraight)
				{
				BLI_init_srgb_conversion();
				Color4b<Srgb, eAlpha::Straight> srgb(192, 128, 64, 128);
				Color4f<LinearRGB, eAlpha::Straight> linear(srgb);
				EXPECT_NEAR(0.52f, linear.r, 0.01f);
				EXPECT_NEAR(0.21f, linear.g, 0.01f);
				EXPECT_NEAR(0.05f, linear.b, 0.01f);
				EXPECT_NEAR(0.5f, linear.a, 0.01f);
				}

				TEST(color, SrgbStraightToLinearPremultiplied)
				{
				BLI_init_srgb_conversion();
				Color4b<Srgb, eAlpha::Straight> srgb(192, 128, 64, 128);
				Color4f<LinearRGB, eAlpha::Premultiplied> linear(srgb);
				EXPECT_NEAR(0.26f, linear.r, 0.01f);
				EXPECT_NEAR(0.11f, linear.g, 0.01f);
				EXPECT_NEAR(0.02f, linear.b, 0.01f);
				EXPECT_NEAR(0.5f, linear.a, 0.01f);
				}

				TEST(color, LinearStraightToPremultiplied)
				{
				Color4f<LinearRGB, eAlpha::Straight> straight(0.75f, 0.5f, 0.25f, 0.5f);
				Color4f<LinearRGB, eAlpha::Premultiplied> premultiplied(straight);
				EXPECT_NEAR(0.37f, premultiplied.r, 0.01f);
				EXPECT_NEAR(0.25f, premultiplied.g, 0.01f);
				EXPECT_NEAR(0.12f, premultiplied.b, 0.01f);
				EXPECT_NEAR(0.5f, premultiplied.a, 0.01f);
				}

				TEST(color, LinearPremultipliedToStraight)
				{
				Color4f<LinearRGB, eAlpha::Premultiplied> premultiplied(0.75f, 0.5f, 0.25f, 0.5f);
				Color4f<LinearRGB, eAlpha::Straight> straight(premultiplied);
				EXPECT_NEAR(1.5f, straight.r, 0.01f);
				EXPECT_NEAR(1.0f, straight.g, 0.01f);
				EXPECT_NEAR(0.5f, straight.b, 0.01f);
				EXPECT_NEAR(0.5f, straight.a, 0.01f);
				}

				TEST(color, LinearStraightSrgbFloat)
				{
				BLI_init_srgb_conversion();
				Color4f<LinearRGB, eAlpha::Straight> linear(0.75f, 0.5f, 0.25f, 0.5f);
				Color4f<Srgb, eAlpha::Straight> srgb(linear);
				EXPECT_NEAR(0.88f, srgb.r, 0.01);
				EXPECT_NEAR(0.73f, srgb.g, 0.01);
				EXPECT_NEAR(0.53f, srgb.b, 0.01);
				EXPECT_NEAR(0.5f, srgb.a, 0.01);
				}

				TEST(color, LinearPremultipliedToSrgbFloat)
				{
				BLI_init_srgb_conversion();
				Color4f<LinearRGB, eAlpha::Premultiplied> linear(0.75f, 0.5f, 0.25f, 0.5f);
				Color4f<Srgb, eAlpha::Straight> srgb(linear);
				EXPECT_NEAR(1.19f, srgb.r, 0.01);
				EXPECT_NEAR(1.0f, srgb.g, 0.01);
				EXPECT_NEAR(0.74f, srgb.b, 0.01);
				EXPECT_NEAR(0.5f, srgb.a, 0.01);
				}

				TEST(color, LinearStraightSrgbByte)
				{
				BLI_init_srgb_conversion();
				Color4f<LinearRGB, eAlpha::Straight> linear(0.75f, 0.5f, 0.25f, 0.5f);
				Color4b<Srgb, eAlpha::Straight> srgb(linear);
				EXPECT_EQ(225, srgb.r);
				EXPECT_EQ(188, srgb.g);
				EXPECT_EQ(137, srgb.b);
				EXPECT_EQ(128, srgb.a);
				}

				TEST(color, LinearPremultipliedToSrgbByte)
				{
				BLI_init_srgb_conversion();
				Color4f<LinearRGB, eAlpha::Premultiplied> linear(0.75f, 0.5f, 0.25f, 0.5f);
				Color4b<Srgb, eAlpha::Straight> srgb(linear);
				EXPECT_EQ(255, srgb.r);
				EXPECT_EQ(255, srgb.g);
				EXPECT_EQ(188, srgb.b);
				EXPECT_EQ(128, srgb.a);
				}

				/* \} */

				} // namespace blender::tests
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