Tools/TestWebKitAPI/Tests/WebCore/cg/GraphicsContextTestsCG.cpp

/*
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#include "config.h"

#if USE(CG)

#include <WebCore/DestinationColorSpace.h>
#include <WebCore/GraphicsContextCG.h>

namespace TestWebKitAPI {
using namespace WebCore;

constexpr CGFloat contextWidth = 1;
constexpr CGFloat contextHeight = 1;

RetainPtr<CGImageRef> greenImage()
{
    auto colorSpace = DestinationColorSpace::SRGB();
    auto cgContext = adoptCF(CGBitmapContextCreate(nullptr, contextWidth, contextHeight, 8, 4 * contextWidth, colorSpace.platformColorSpace(), kCGImageAlphaPremultipliedLast));
    GraphicsContextCG ctx(cgContext.get());
    ctx.fillRect(FloatRect(0, 0, contextWidth, contextHeight), Color::green);
    return adoptCF(CGBitmapContextCreateImage(cgContext.get()));
}

TEST(GraphicsContextTests, DrawNativeImageDoesNotLeakCompositeOperator)
{
    auto colorSpace = DestinationColorSpace::SRGB();
    auto cgContext = adoptCF(CGBitmapContextCreate(nullptr, contextWidth, contextHeight, 8, 4 * contextWidth, colorSpace.platformColorSpace(), kCGImageAlphaPremultipliedLast));
    GraphicsContextCG ctx(cgContext.get());

    EXPECT_EQ(ctx.compositeOperation(), CompositeOperator::SourceOver);
    EXPECT_EQ(ctx.blendModeOperation(), BlendMode::Normal);

    auto greenPixelCG = greenImage();
    auto greenPixelNative = NativeImage::create(greenPixelCG.get());
    FloatRect rect(0, 0, contextWidth, contextHeight);
    FloatRect sourceRect(0, 0, contextWidth / 2, contextHeight / 2);
    ctx.drawNativeImage(*greenPixelNative, { contextWidth, contextHeight }, rect, sourceRect, { WebCore::CompositeOperator::Copy });

    CGContextSetRGBFillColor(cgContext.get(), 0, 0, 0, 0);
    CGContextFillRect(cgContext.get(), rect);

    // The context should have one green pixel.
    CGContextFlush(cgContext.get());
    uint8_t* primaryData = static_cast<uint8_t*>(CGBitmapContextGetData(cgContext.get()));
    EXPECT_EQ(primaryData[0], 0);
    EXPECT_EQ(primaryData[1], 255);
    EXPECT_EQ(primaryData[2], 0);

    EXPECT_EQ(ctx.compositeOperation(), CompositeOperator::SourceOver);
    EXPECT_EQ(ctx.blendModeOperation(), BlendMode::Normal);
}

} // namespace TestWebKitAPI

#endif // USE(CG)