Tools/TestWebKitAPI/Tests/WebCore/ExtendedColorTests.cpp

/*
 * Copyright (C) 2016 Apple Inc. All rights reserved.
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#include "config.h"

#include "Test.h"
#include "WTFStringUtilities.h"
#include <WebCore/Color.h>
#include <WebCore/ColorSerialization.h>
#include <wtf/MathExtras.h>

using namespace WebCore;

namespace TestWebKitAPI {

TEST(ExtendedColor, Constructor)
{
    Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
    EXPECT_TRUE(c1.isExtended());

    auto [r, g, b, alpha] = c1.asExtended().components();

    EXPECT_FLOAT_EQ(1.0, r);
    EXPECT_FLOAT_EQ(0.5, g);
    EXPECT_FLOAT_EQ(0.25, b);
    EXPECT_FLOAT_EQ(1.0, alpha);
    EXPECT_EQ(1u, c1.asExtended().refCount());
    EXPECT_EQ(serializationForCSS(c1), "color(display-p3 1 0.5 0.25)");
}

TEST(ExtendedColor, CopyConstructor)
{
    Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
    EXPECT_TRUE(c1.isExtended());

    Color c2(c1);

    auto [r, g, b, alpha] = c2.asExtended().components();

    EXPECT_FLOAT_EQ(1.0, r);
    EXPECT_FLOAT_EQ(0.5, g);
    EXPECT_FLOAT_EQ(0.25, b);
    EXPECT_FLOAT_EQ(1.0, alpha);
    EXPECT_EQ(2u, c1.asExtended().refCount());
    EXPECT_EQ(2u, c2.asExtended().refCount());
    EXPECT_EQ(serializationForCSS(c2), "color(display-p3 1 0.5 0.25)");
}

TEST(ExtendedColor, Assignment)
{
    Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
    EXPECT_TRUE(c1.isExtended());

    Color c2 = c1;

    auto [r, g, b, alpha] = c2.asExtended().components();

    EXPECT_FLOAT_EQ(1.0, r);
    EXPECT_FLOAT_EQ(0.5, g);
    EXPECT_FLOAT_EQ(0.25, b);
    EXPECT_FLOAT_EQ(1.0, alpha);
    EXPECT_EQ(2u, c1.asExtended().refCount());
    EXPECT_EQ(2u, c2.asExtended().refCount());
    EXPECT_EQ(serializationForCSS(c2), "color(display-p3 1 0.5 0.25)");
}

TEST(ExtendedColor, Equality)
{
    {
        Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
        EXPECT_TRUE(c1.isExtended());

        Color c2 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
        EXPECT_TRUE(c1.isExtended());

        EXPECT_EQ(c1, c2);
    }

    {
        Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
        EXPECT_TRUE(c1.isExtended());

        Color c2 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::SRGB) };
        EXPECT_TRUE(c1.isExtended());

        EXPECT_NE(c1, c2);
    }

    int r = 255;
    int g = 128;
    int b = 63;
    int a = 127;
    Color rgb1 { makeExtendedColor(r / 255.0, g / 255.0, b / 255.0, a / 255.0, ColorSpace::SRGB) };
    Color rgb2 = makeSimpleColor(r, g, b, a);
    EXPECT_NE(rgb1, rgb2);
    EXPECT_NE(rgb2, rgb1);
}

TEST(ExtendedColor, Hash)
{
    {
        Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
        EXPECT_TRUE(c1.isExtended());

        Color c2 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
        EXPECT_TRUE(c1.isExtended());

        EXPECT_EQ(c1.hash(), c2.hash());
    }

    {
        Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
        EXPECT_TRUE(c1.isExtended());

        Color c2 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::SRGB) };
        EXPECT_TRUE(c1.isExtended());

        EXPECT_NE(c1.hash(), c2.hash());
    }

    int r = 255;
    int g = 128;
    int b = 63;
    int a = 127;
    Color rgb1 { makeExtendedColor(r / 255.0, g / 255.0, b / 255.0, a / 255.0, ColorSpace::SRGB) };
    Color rgb2 = makeSimpleColor(r, g, b, a);
    EXPECT_NE(rgb1.hash(), rgb2.hash());
}

TEST(ExtendedColor, MoveConstructor)
{
    Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
    EXPECT_TRUE(c1.isExtended());

    Color c2(WTFMove(c1));
    // We should have moved the extended color pointer into c2,
    // and set c1 to invalid so that it doesn't cause deletion.
    EXPECT_FALSE(c1.isExtended());
    EXPECT_FALSE(c1.isValid());

    auto [r, g, b, alpha] = c2.asExtended().components();

    EXPECT_FLOAT_EQ(1.0, r);
    EXPECT_FLOAT_EQ(0.5, g);
    EXPECT_FLOAT_EQ(0.25, b);
    EXPECT_FLOAT_EQ(1.0, alpha);
    EXPECT_EQ(1u, c2.asExtended().refCount());
    EXPECT_EQ(serializationForCSS(c2), "color(display-p3 1 0.5 0.25)");
}

TEST(ExtendedColor, MoveAssignment)
{
    Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
    EXPECT_TRUE(c1.isExtended());

    Color c2 = WTFMove(c1);

    // We should have moved the extended color pointer into c2,
    // and set c1 to invalid so that it doesn't cause deletion.
    EXPECT_FALSE(c1.isExtended());
    EXPECT_FALSE(c1.isValid());

    auto [r, g, b, alpha] = c2.asExtended().components();

    EXPECT_FLOAT_EQ(1.0, r);
    EXPECT_FLOAT_EQ(0.5, g);
    EXPECT_FLOAT_EQ(0.25, b);
    EXPECT_FLOAT_EQ(1.0, alpha);
    EXPECT_EQ(1u, c2.asExtended().refCount());
    EXPECT_EQ(serializationForCSS(c2), "color(display-p3 1 0.5 0.25)");
}

TEST(ExtendedColor, BasicReferenceCounting)
{
    Color* c1 = new Color { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
    EXPECT_TRUE(c1->isExtended());

    Color* c2 = new Color(*c1);
    Color* c3 = new Color(*c2);

    auto [r, g, b, alpha] = c2->asExtended().components();

    EXPECT_FLOAT_EQ(1.0, r);
    EXPECT_FLOAT_EQ(0.5, g);
    EXPECT_FLOAT_EQ(0.25, b);
    EXPECT_FLOAT_EQ(1.0, alpha);
    EXPECT_EQ(3u, c2->asExtended().refCount());
    EXPECT_EQ(serializationForCSS(*c2), "color(display-p3 1 0.5 0.25)");

    delete c1;
    EXPECT_EQ(2u, c2->asExtended().refCount());

    delete c2;
    EXPECT_EQ(1u, c3->asExtended().refCount());

    delete c3;
}

Color makeColor()
{
    Color c1 { makeExtendedColor(1.0, 0.5, 0.25, 1.0, ColorSpace::DisplayP3) };
    EXPECT_TRUE(c1.isExtended());
    EXPECT_EQ(1u, c1.asExtended().refCount());

    return c1;
}

TEST(ExtendedColor, ReturnValues)
{
    Color c2 = makeColor();
    EXPECT_TRUE(c2.isExtended());

    EXPECT_EQ(1u, c2.asExtended().refCount());
    EXPECT_EQ(serializationForCSS(c2), "color(display-p3 1 0.5 0.25)");
}

TEST(ExtendedColor, P3ConversionToSRGB)
{
    Color p3Color { makeExtendedColor(1.0, 0.5, 0.25, 0.75, ColorSpace::DisplayP3) };
    EXPECT_TRUE(p3Color.isExtended());

    auto sRGBAColor = p3Color.toSRGBALossy();
    EXPECT_TRUE(WTF::areEssentiallyEqual(sRGBAColor.red, 1.0f));
    EXPECT_TRUE(WTF::areEssentiallyEqual(sRGBAColor.green, 0.462537885f));
    EXPECT_TRUE(WTF::areEssentiallyEqual(sRGBAColor.blue, 0.149147838f));
    EXPECT_TRUE(WTF::areEssentiallyEqual(sRGBAColor.alpha, 0.75f));
}

TEST(ExtendedColor, LinearSRGBConversionToSRGB)
{
    Color linearColor { makeExtendedColor(1.0, 0.5, 0.25, 0.75, ColorSpace::LinearRGB) };
    EXPECT_TRUE(linearColor.isExtended());
    auto sRGBAColor = linearColor.toSRGBALossy();
    EXPECT_TRUE(WTF::areEssentiallyEqual(sRGBAColor.red, 1.0f));
    EXPECT_TRUE(WTF::areEssentiallyEqual(sRGBAColor.green, 0.735356927f));
    EXPECT_TRUE(WTF::areEssentiallyEqual(sRGBAColor.blue, 0.537098706f));
    EXPECT_TRUE(WTF::areEssentiallyEqual(sRGBAColor.alpha, 0.75f));
}

} // namespace TestWebKitAPI