CCQuadCuller.cpp   [plain text]

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

#if USE(ACCELERATED_COMPOSITING)

#include "cc/CCQuadCuller.h"

#include "Region.h"
#include "TransformationMatrix.h"
#include "cc/CCLayerImpl.h"
#include "cc/CCOverdrawMetrics.h"
#include "cc/CCRenderPass.h"
#include "cc/CCRenderSurfaceDrawQuad.h"

using namespace std;

namespace WebCore {

CCQuadCuller::CCQuadCuller(CCQuadList& quadList, CCLayerImpl* layer, const CCOcclusionTrackerImpl* occlusionTracker)
    : m_quadList(quadList)
    , m_layer(layer)
    , m_occlusionTracker(occlusionTracker)
{
}

static inline bool appendQuadInternal(PassOwnPtr<CCDrawQuad> passDrawQuad, const IntRect& culledRect, CCQuadList& quadList, const CCOcclusionTrackerImpl& occlusionTracker)
{
    OwnPtr<CCDrawQuad> drawQuad(passDrawQuad);
    bool keepQuad = !culledRect.isEmpty();
    if (keepQuad)
        drawQuad->setQuadVisibleRect(culledRect);

    occlusionTracker.overdrawMetrics().didCullForDrawing(drawQuad->quadTransform(), drawQuad->quadRect(), culledRect);
    occlusionTracker.overdrawMetrics().didDraw(drawQuad->quadTransform(), culledRect, drawQuad->opaqueRect());

    // Release the quad after we're done using it.
    if (keepQuad)
        quadList.append(drawQuad.release());
    return keepQuad;
}

bool CCQuadCuller::append(PassOwnPtr<CCDrawQuad> passDrawQuad)
{
    IntRect culledRect = m_occlusionTracker->unoccludedContentRect(m_layer, passDrawQuad->quadRect());
    return appendQuadInternal(passDrawQuad, culledRect, m_quadList, *m_occlusionTracker);
}

bool CCQuadCuller::appendSurface(PassOwnPtr<CCDrawQuad> passDrawQuad)
{
    IntRect culledRect = m_occlusionTracker->unoccludedContributingSurfaceContentRect(m_layer->renderSurface(), false, passDrawQuad->quadRect());
    return appendQuadInternal(passDrawQuad, culledRect, m_quadList, *m_occlusionTracker);
}

bool CCQuadCuller::appendReplica(PassOwnPtr<CCDrawQuad> passDrawQuad)
{
    IntRect culledRect = m_occlusionTracker->unoccludedContributingSurfaceContentRect(m_layer->renderSurface(), true, passDrawQuad->quadRect());
    return appendQuadInternal(passDrawQuad, culledRect, m_quadList, *m_occlusionTracker);
}

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