CCSolidColorLayerImpl.cpp   [plain text]

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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#include "config.h"

#if USE(ACCELERATED_COMPOSITING)

#include "cc/CCSolidColorLayerImpl.h"

#include "LayerRendererChromium.h"
#include "cc/CCQuadCuller.h"
#include "cc/CCSolidColorDrawQuad.h"
#include <wtf/MathExtras.h>
#include <wtf/text/WTFString.h>

using namespace std;

namespace WebCore {

CCSolidColorLayerImpl::CCSolidColorLayerImpl(int id)
    : CCLayerImpl(id)
    , m_tileSize(256)
{
}

CCSolidColorLayerImpl::~CCSolidColorLayerImpl()
{
}

TransformationMatrix CCSolidColorLayerImpl::quadTransform() const
{
    TransformationMatrix solidColorTransform = drawTransform();
    solidColorTransform.translate(-bounds().width() / 2.0, -bounds().height() / 2.0);

    return solidColorTransform;
}

void CCSolidColorLayerImpl::appendQuads(CCQuadCuller& quadList, const CCSharedQuadState* sharedQuadState, bool&)
{
    // We create a series of smaller quads instead of just one large one so that the
    // culler can reduce the total pixels drawn.
    int width = bounds().width();
    int height = bounds().height();
    for (int x = 0; x < width; x += m_tileSize) {
        for (int y = 0; y < height; y += m_tileSize) {
            IntRect solidTileRect(x, y, min(width - x, m_tileSize), min(height - y, m_tileSize));
            quadList.append(CCSolidColorDrawQuad::create(sharedQuadState, solidTileRect, backgroundColor()));
        }
    }
}

} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)