Differential D10978 Diff 36166 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 {

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

				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)
				{
				BLI_init_srgb_conversion();
				Color4f<LinearRGB, eAlpha::Straight> unassociated(0.75f, 0.5f, 0.25f, 0.5f);
				Color4f<LinearRGB, eAlpha::Premultiplied> associated(unassociated);
				EXPECT_NEAR(0.37f, associated.r, 0.01f);
				EXPECT_NEAR(0.25f, associated.g, 0.01f);
				EXPECT_NEAR(0.12f, associated.b, 0.01f);
				EXPECT_NEAR(0.5f, associated.a, 0.01f);
				}

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

				TEST(color, LinearStraightSrgbFloat)
				{
				BLI_init_srgb_conversion();
				Color4f<LinearRGB, eAlpha::Straight> linear(0.75f, 0.5f, 0.25f, 0.5f);
				/* Error: this uses the float constructor and does not do any conversions. */
				Color4f<Srgb, eAlpha::Straight> srgb(linear);
				EXPECT_NEAR(0, srgb.r, 0.01);
				EXPECT_NEAR(0, srgb.g, 0.01);
				EXPECT_NEAR(0, srgb.b, 0.01);
				EXPECT_NEAR(0, 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(0, srgb.r, 0.01);
				EXPECT_NEAR(0, srgb.g, 0.01);
				EXPECT_NEAR(0, srgb.b, 0.01);
				EXPECT_NEAR(0, 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(0, srgb.r);
				EXPECT_EQ(0, srgb.g);
				EXPECT_EQ(0, srgb.b);
				EXPECT_EQ(0, 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(0, srgb.r);
				EXPECT_EQ(0, srgb.g);
				EXPECT_EQ(0, srgb.b);
				EXPECT_EQ(0, srgb.a);
				}

				} // namespace blender::tests
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