C++ rootLayer函数代码示例

String LayerRendererChromium::layerTreeAsText() const
{
    TextStream ts;
    if (rootLayer()) {
        ts << rootLayer()->layerTreeAsText();
        ts << "RenderSurfaces:\n";
        dumpRenderSurfaces(ts, 1, rootLayer());
    }
    return ts.release();
}

void PaintLayerCompositor::updateWithoutAcceleratedCompositing(CompositingUpdateType updateType)
{
    ASSERT(!hasAcceleratedCompositing());

    if (updateType >= CompositingUpdateAfterCompositingInputChange)
        CompositingInputsUpdater(rootLayer()).update();

#if ENABLE(ASSERT)
    CompositingInputsUpdater::assertNeedsCompositingInputsUpdateBitsCleared(rootLayer());
#endif
}

void LegacyCACFLayerTreeHost::resize()
{
    if (!m_d3dDevice)
        return;

    // Resetting the device might fail here. But that's OK, because if it does it we will attempt to
    // reset the device the next time we try to render.
    resetDevice(ChangedWindowSize);

    if (rootLayer()) {
        rootLayer()->setBounds(bounds());
        flushContext();
    }
}

void CoordinatedGraphicsScene::paintToGraphicsContext(PlatformGraphicsContext* platformContext, const Color& backgroundColor, bool drawsBackground)
{
    if (!m_textureMapper)
        m_textureMapper = TextureMapper::create();
    ASSERT(m_textureMapper->accelerationMode() == TextureMapper::SoftwareMode);
    syncRemoteContent();
    TextureMapperLayer* layer = rootLayer();

    if (!layer)
        return;

    GraphicsContext graphicsContext(platformContext);
    m_textureMapper->setGraphicsContext(&graphicsContext);
    m_textureMapper->beginPainting();

    IntRect clipRect = graphicsContext.clipBounds();
    if (drawsBackground)
        m_textureMapper->drawSolidColor(clipRect, TransformationMatrix(), backgroundColor);
    else
        m_textureMapper->drawSolidColor(clipRect, TransformationMatrix(), m_viewBackgroundColor);

    layer->paint();
    m_fpsCounter.updateFPSAndDisplay(m_textureMapper.get(), clipRect.location());
    m_textureMapper->endPainting();
    m_textureMapper->setGraphicsContext(0);
}

	bool TestMouseManager::testSimple() {
		
		Handle<Layer> rootLayer(new Layer());
		Handle<Renderable> target1(new Renderable());
		rootLayer->addChild(target1);
		rootLayer->setInteractive(true);
		target1->setInteractive(true);
		target1->setSize(50, 50);
		target1->setPosition(50, 50);

		TestListener targetListener;
		target1->addEventListener(MOUSE_DOWN, &targetListener);

		TestListener layerListener;
		rootLayer->addEventListener(MOUSE_DOWN, &layerListener);

		MouseManager *manager = MouseManager::getManager();
		manager->setRootLayer(rootLayer);

		manager->onMouseDown(LEFT_BUTTON, 0, 0);
		assert(NULL == targetListener.lastEvent.get());
		assert(NULL == layerListener.lastEvent.get());

		manager->onMouseDown(LEFT_BUTTON, 51, 52);
		assert(NULL != targetListener.lastEvent.get());
		am_equals(1, targetListener.lastEvent->getLocalMouseX());
		am_equals(2, targetListener.lastEvent->getLocalMouseY());

		assert(NULL != layerListener.lastEvent.get());
		assert(layerListener.lastEvent->getEventTarget() == target1);
		am_equals(1, layerListener.lastEvent->getLocalMouseX());
		am_equals(2, layerListener.lastEvent->getLocalMouseY());

		return true;
	}

void PaintLayerCompositor::fullyInvalidatePaint()
{
    // We're walking all compositing layers and invalidating them, so there's
    // no need to have up-to-date compositing state.
    DisableCompositingQueryAsserts disabler;
    fullyInvalidatePaintRecursive(rootLayer());
}

void PaintLayerCompositor::updateIfNeededRecursive()
{
    FrameView* view = m_layoutView.frameView();
    if (view->shouldThrottleRendering())
        return;

    for (Frame* child = m_layoutView.frameView()->frame().tree().firstChild(); child; child = child->tree().nextSibling()) {
        if (!child->isLocalFrame())
            continue;
        LocalFrame* localFrame = toLocalFrame(child);
        // It's possible for trusted Pepper plugins to force hit testing in situations where
        // the frame tree is in an inconsistent state, such as in the middle of frame detach.
        // TODO(bbudge) Remove this check when trusted Pepper plugins are gone.
        if (localFrame->document()->isActive())
            localFrame->contentLayoutObject()->compositor()->updateIfNeededRecursive();
    }

    TRACE_EVENT0("blink", "PaintLayerCompositor::updateIfNeededRecursive");

    ASSERT(!m_layoutView.needsLayout());

    ScriptForbiddenScope forbidScript;

    // FIXME: enableCompositingModeIfNeeded can trigger a CompositingUpdateRebuildTree,
    // which asserts that it's not InCompositingUpdate.
    enableCompositingModeIfNeeded();

    if (m_needsUpdateDescendantDependentFlags) {
        updateDescendantDependentFlagsForEntireSubtree(*rootLayer());
        m_needsUpdateDescendantDependentFlags = false;
    }

    m_layoutView.commitPendingSelection();

    lifecycle().advanceTo(DocumentLifecycle::InCompositingUpdate);
    updateIfNeeded();
    lifecycle().advanceTo(DocumentLifecycle::CompositingClean);

    DocumentAnimations::updateCompositorAnimations(m_layoutView.document());

    m_layoutView.frameView()->scrollableArea()->updateCompositorScrollAnimations();
    if (const FrameView::ScrollableAreaSet* animatingScrollableAreas = m_layoutView.frameView()->animatingScrollableAreas()) {
        for (ScrollableArea* scrollableArea : *animatingScrollableAreas)
            scrollableArea->updateCompositorScrollAnimations();
    }

#if ENABLE(ASSERT)
    ASSERT(lifecycle().state() == DocumentLifecycle::CompositingClean);
    assertNoUnresolvedDirtyBits();
    for (Frame* child = m_layoutView.frameView()->frame().tree().firstChild(); child; child = child->tree().nextSibling()) {
        if (!child->isLocalFrame())
            continue;
        LocalFrame* localFrame = toLocalFrame(child);
        if (localFrame->shouldThrottleRendering())
            continue;
        localFrame->contentLayoutObject()->compositor()->assertNoUnresolvedDirtyBits();
    }
#endif
}

void WKCACFViewLayerTreeHost::updateViewIfNeeded()
{
    if (!m_viewNeedsUpdate)
        return;
    m_viewNeedsUpdate = false;

    CGRect layerBounds = rootLayer()->bounds();

    CGRect bounds = this->bounds();
    WKCACFViewUpdate(m_view.get(), window(), &bounds);

    if (CGRectEqualToRect(layerBounds, rootLayer()->bounds()))
        return;

    // Flush the context so the layer's rendered bounds will match our bounds.
    flushContext();
}

void PaintLayerCompositor::updateAcceleratedCompositingSettings()
{
    m_compositingReasonFinder.updateTriggers();
    m_hasAcceleratedCompositing = m_layoutView.document().settings()->acceleratedCompositingEnabled();
    m_rootShouldAlwaysCompositeDirty = true;
    if (m_rootLayerAttachment != RootLayerUnattached)
        rootLayer()->setNeedsCompositingInputsUpdate();
}

TextureMapperCache* TextureMapperNode::cache()
{
    TextureMapperNode* root = rootLayer();
    if (!root)
        return 0;
    if (!root->m_cache)
        root->m_cache = new TextureMapperCache;
    return root->m_cache;
}

TextureMapperLayerClientQt::TextureMapperLayerClientQt(QWebFrame* frame, GraphicsLayer* layer)
    : m_frame(frame)
    , m_rootGraphicsLayer(GraphicsLayer::create(0))
{
    m_frame->d->rootTextureMapperLayer = rootLayer();
    m_rootGraphicsLayer->addChild(layer);
    m_rootGraphicsLayer->setDrawsContent(false);
    m_rootGraphicsLayer->setMasksToBounds(false);
    m_rootGraphicsLayer->setSize(IntSize(1, 1));
}

// This function commits the CCLayerTreeHost to an impl tree. When modifying
// this function, keep in mind that the function *runs* on the impl thread! Any
// code that is logically a main thread operation, e.g. deletion of a LayerChromium,
// should be delayed until the CCLayerTreeHost::commitComplete, which will run
// after the commit, but on the main thread.
void CCLayerTreeHost::finishCommitOnImplThread(CCLayerTreeHostImpl* hostImpl)
{
    ASSERT(CCProxy::isImplThread());

    hostImpl->setRootLayer(TreeSynchronizer::synchronizeTrees(rootLayer(), hostImpl->releaseRootLayer()));

    // We may have added an animation during the tree sync. This will cause both layer tree hosts
    // to visit their controllers.
    if (rootLayer()) {
        hostImpl->setNeedsAnimateLayers();
        m_needsAnimateLayers = true;
    }

    hostImpl->setSourceFrameNumber(frameNumber());
    hostImpl->setViewportSize(viewportSize());
    hostImpl->setPageScaleFactorAndLimits(m_pageScaleFactor, m_minPageScaleFactor, m_maxPageScaleFactor);
    hostImpl->setBackgroundColor(m_backgroundColor);

    m_frameNumber++;
}

void CoordinatedGraphicsScene::paintToCurrentGLContext(const TransformationMatrix& matrix, float opacity, const FloatRect& clipRect, TextureMapper::PaintFlags PaintFlags)
{
    if (!m_textureMapper) {
        m_textureMapper = TextureMapper::create(TextureMapper::OpenGLMode);
        static_cast<TextureMapperGL*>(m_textureMapper.get())->setEnableEdgeDistanceAntialiasing(true);
    }

    ASSERT(m_textureMapper->accelerationMode() == TextureMapper::OpenGLMode);
    syncRemoteContent();

    adjustPositionForFixedLayers();
    GraphicsLayer* currentRootLayer = rootLayer();
    if (!currentRootLayer)
        return;

    TextureMapperLayer* layer = toTextureMapperLayer(currentRootLayer);

    if (!layer)
        return;

    layer->setTextureMapper(m_textureMapper.get());
    if (!m_animationsLocked)
        layer->applyAnimationsRecursively();
    m_textureMapper->beginPainting(PaintFlags);
    m_textureMapper->beginClip(TransformationMatrix(), clipRect);

    if (m_setDrawsBackground) {
        RGBA32 rgba = makeRGBA32FromFloats(m_backgroundColor.red(),
            m_backgroundColor.green(), m_backgroundColor.blue(),
            m_backgroundColor.alpha() * opacity);
        m_textureMapper->drawSolidColor(clipRect, TransformationMatrix(), Color(rgba));
    }

    if (currentRootLayer->opacity() != opacity || currentRootLayer->transform() != matrix) {
        currentRootLayer->setOpacity(opacity);
        currentRootLayer->setTransform(matrix);
        currentRootLayer->flushCompositingStateForThisLayerOnly();
    }

    layer->paint();
    m_fpsCounter.updateFPSAndDisplay(m_textureMapper.get(), clipRect.location(), matrix);
    m_textureMapper->endClip();
    m_textureMapper->endPainting();

    if (layer->descendantsOrSelfHaveRunningAnimations())
        dispatchOnMainThread(bind(&CoordinatedGraphicsScene::updateViewport, this));

#if ENABLE(REQUEST_ANIMATION_FRAME)
    if (m_animationFrameRequested) {
        m_animationFrameRequested = false;
        dispatchOnMainThread(bind(&CoordinatedGraphicsScene::animationFrameReady, this));
    }
#endif
}

void PaintLayerCompositor::didLayout()
{
    // FIXME: Technically we only need to do this when the FrameView's
    // isScrollable method would return a different value.
    m_rootShouldAlwaysCompositeDirty = true;
    enableCompositingModeIfNeeded();

    // FIXME: Rather than marking the entire LayoutView as dirty, we should
    // track which Layers moved during layout and only dirty those
    // specific Layers.
    rootLayer()->setNeedsCompositingInputsUpdate();
}

void CoordinatedGraphicsScene::paintToCurrentGLContext(const TransformationMatrix& matrix, float opacity, const FloatRect& clipRect, const Color& backgroundColor, bool drawsBackground, const FloatPoint& contentPosition, TextureMapper::PaintFlags PaintFlags)
{
    if (!m_textureMapper) {
        m_textureMapper = TextureMapper::create();
        static_cast<TextureMapperGL*>(m_textureMapper.get())->setEnableEdgeDistanceAntialiasing(true);
    }

    syncRemoteContent();

    adjustPositionForFixedLayers(contentPosition);
    TextureMapperLayer* currentRootLayer = rootLayer();
    if (!currentRootLayer)
        return;

#if USE(COORDINATED_GRAPHICS_THREADED)
    for (auto& proxy : m_platformLayerProxies.values())
        proxy->swapBuffer();
#endif

    currentRootLayer->setTextureMapper(m_textureMapper.get());
    currentRootLayer->applyAnimationsRecursively();
    m_textureMapper->beginPainting(PaintFlags);
    m_textureMapper->beginClip(TransformationMatrix(), clipRect);

    if (drawsBackground) {
        RGBA32 rgba = makeRGBA32FromFloats(backgroundColor.red(),
                                           backgroundColor.green(), backgroundColor.blue(),
                                           backgroundColor.alpha() * opacity);
        m_textureMapper->drawSolidColor(clipRect, TransformationMatrix(), Color(rgba));
    } else {
        GraphicsContext3D* context = static_cast<TextureMapperGL*>(m_textureMapper.get())->graphicsContext3D();
        context->clearColor(m_viewBackgroundColor.red() / 255.0f, m_viewBackgroundColor.green() / 255.0f, m_viewBackgroundColor.blue() / 255.0f, m_viewBackgroundColor.alpha() / 255.0f);
        context->clear(GraphicsContext3D::COLOR_BUFFER_BIT);
    }

    if (currentRootLayer->opacity() != opacity || currentRootLayer->transform() != matrix) {
        currentRootLayer->setOpacity(opacity);
        currentRootLayer->setTransform(matrix);
    }

    currentRootLayer->paint();
    m_fpsCounter.updateFPSAndDisplay(*m_textureMapper, clipRect.location(), matrix);
    m_textureMapper->endClip();
    m_textureMapper->endPainting();

    if (currentRootLayer->descendantsOrSelfHaveRunningAnimations()) {
        RefPtr<CoordinatedGraphicsScene> protector(this);
        dispatchOnClientRunLoop([=] {
            protector->updateViewport();
        });
    }
}