49cdf582ff
We're going to implement the `contrast-color()` CSS function in the next commit, and the spec advises to use the contrast ratio definition as described in WCAG 2. So let's replace our `Color::contrast_ratio()` implementation by that. Co-authored-by: InvalidUsernameException <InvalidUsernameException@users.noreply.github.com>
111 lines
4.5 KiB
C++
111 lines
4.5 KiB
C++
/*
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* Copyright (c) 2024, Lucas Chollet <lucas.chollet@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGfx/Color.h>
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#include <LibTest/TestCase.h>
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TEST_CASE(relative_luminance)
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{
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auto const orange = Color(247, 143, 0);
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EXPECT_APPROXIMATE(Color(Color::NamedColor::Black).relative_luminance(), 0.0);
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EXPECT_APPROXIMATE(Color(Color::NamedColor::White).relative_luminance(), 1.0);
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EXPECT_APPROXIMATE_WITH_ERROR(orange.relative_luminance(), 0.394190782, 0.0000005);
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}
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TEST_CASE(contrast_ratio)
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{
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auto const orange = Color(247, 143, 0);
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EXPECT_APPROXIMATE(Color(Color::NamedColor::Black).contrast_ratio(Color::NamedColor::White), 21.0);
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EXPECT_APPROXIMATE_WITH_ERROR(
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orange.contrast_ratio(Color::NamedColor::Black), 8.883815642, 0.0000005);
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EXPECT_APPROXIMATE_WITH_ERROR(
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orange.contrast_ratio(Color::NamedColor::White), 2.363849144, 0.0000005);
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EXPECT(orange.contrast_ratio(Color::NamedColor::Black) > orange.contrast_ratio(Color::NamedColor::White));
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}
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TEST_CASE(suggested_foreground_color)
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{
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EXPECT_EQ(Color(Color::NamedColor::White), Color(Color::NamedColor::Black).suggested_foreground_color());
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EXPECT_EQ(Color(Color::NamedColor::Black), Color(Color::NamedColor::White).suggested_foreground_color());
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EXPECT_EQ(Color(Color::NamedColor::Black), Color(247, 143, 0).suggested_foreground_color());
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}
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TEST_CASE(from_bgrx)
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{
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EXPECT_EQ(Color(0x00, 0x00, 0xff), Color::from_bgrx(0x000000ff));
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EXPECT_EQ(Color(0x00, 0xff, 0x00), Color::from_bgrx(0x0000ff00));
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EXPECT_EQ(Color(0xff, 0x00, 0x00), Color::from_bgrx(0x00ff0000));
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EXPECT_EQ(Color(0x00, 0x00, 0xff), Color::from_bgrx(0xff0000ff));
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EXPECT_EQ(Color(0x00, 0xff, 0x00), Color::from_bgrx(0xff00ff00));
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EXPECT_EQ(Color(0xff, 0x00, 0x00), Color::from_bgrx(0xffff0000));
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EXPECT_EQ(Color(0xaa, 0xbb, 0xcc), Color::from_bgrx(0x00aabbcc));
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}
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TEST_CASE(from_bgra)
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{
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EXPECT_EQ(Color(0x00, 0x00, 0x00, 0xff), Color::from_bgra(0xff000000));
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EXPECT_EQ(Color(0x00, 0x00, 0xff, 0x00), Color::from_bgra(0x000000ff));
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EXPECT_EQ(Color(0x00, 0xff, 0x00, 0x00), Color::from_bgra(0x0000ff00));
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EXPECT_EQ(Color(0xff, 0x00, 0x00, 0x00), Color::from_bgra(0x00ff0000));
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EXPECT_EQ(Color(0xaa, 0xbb, 0xcc, 0xdd), Color::from_bgra(0xddaabbcc));
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}
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TEST_CASE(from_rgbx)
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{
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EXPECT_EQ(Color(0x00, 0x00, 0xff), Color::from_rgbx(0x00ff0000));
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EXPECT_EQ(Color(0x00, 0xff, 0x00), Color::from_rgbx(0x0000ff00));
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EXPECT_EQ(Color(0xff, 0x00, 0x00), Color::from_rgbx(0x000000ff));
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EXPECT_EQ(Color(0x00, 0x00, 0xff), Color::from_rgbx(0xffff0000));
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EXPECT_EQ(Color(0x00, 0xff, 0x00), Color::from_rgbx(0xff00ff00));
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EXPECT_EQ(Color(0xff, 0x00, 0x00), Color::from_rgbx(0xff0000ff));
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EXPECT_EQ(Color(0xaa, 0xbb, 0xcc), Color::from_rgbx(0x00ccbbaa));
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}
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TEST_CASE(from_rgba)
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{
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EXPECT_EQ(Color(0x00, 0x00, 0x00, 0xff), Color::from_rgba(0xff000000));
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EXPECT_EQ(Color(0x00, 0x00, 0xff, 0x00), Color::from_rgba(0x00ff0000));
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EXPECT_EQ(Color(0x00, 0xff, 0x00, 0x00), Color::from_rgba(0x0000ff00));
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EXPECT_EQ(Color(0xff, 0x00, 0x00, 0x00), Color::from_rgba(0x000000ff));
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EXPECT_EQ(Color(0xaa, 0xbb, 0xcc, 0xdd), Color::from_rgba(0xddccbbaa));
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}
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TEST_CASE(all_green)
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{
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EXPECT_EQ(Color(Color::NamedColor::Green), Color::from_lab(87.8185, -79.2711, 80.9946));
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EXPECT_EQ(Color(Color::NamedColor::Green), Color::from_xyz50(0.385152, 0.716887, 0.097081));
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EXPECT_EQ(Color(Color::NamedColor::Green), Color::from_xyz65(0.357584, 0.715169, 0.119195));
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}
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TEST_CASE(hsv)
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{
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EXPECT_EQ(Color(51, 179, 51), Color::from_hsv(120, 0.714285714, .7));
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EXPECT_EQ(Color(51, 179, 51, 128), Color::from_hsv(120, 0.714285714, .7).with_opacity(0.5));
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EXPECT_EQ(Color(87, 128, 77), Color::from_hsv(108, 0.4, .5));
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}
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TEST_CASE(hsl)
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{
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EXPECT_EQ(Color(191, 191, 0), Color::from_hsl(-300, 1.0, 0.375));
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EXPECT_EQ(Color(159, 138, 96), Color::from_hsl(400, 0.25, 0.5));
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EXPECT_EQ(Color(159, 96, 128), Color::from_hsl(330, 0.25, 0.5));
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EXPECT_EQ(Color(128, 0, 128), Color::from_hsl(300, 1.0, 0.25));
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EXPECT_EQ(Color(0, 128, 128), Color::from_hsl(180, 1.0, 0.25));
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EXPECT_EQ(Color(128, 239, 16), Color::from_hsl(90, 0.875, 0.5));
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EXPECT_EQ(Color(128, 223, 32), Color::from_hsl(90, 0.75, 0.5));
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EXPECT_EQ(Color(128, 207, 48), Color::from_hsl(90, 0.625, 0.5));
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EXPECT_EQ(Color(128, 191, 64), Color::from_hsl(90, 0.5, 0.5));
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EXPECT_EQ(Color(128, 175, 80), Color::from_hsl(90, 0.375, 0.5));
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EXPECT_EQ(Color(128, 159, 96), Color::from_hsl(90, 0.25, 0.5));
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}
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