/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "WebLayerTreeViewImpl.h"

#include "CCThreadImpl.h"
#include "GraphicsContext3DPrivate.h"
#include "LayerChromium.h"
#include "WebGraphicsContext3D.h"
#include "WebLayer.h"
#include "WebLayerTreeView.h"
#include "WebLayerTreeViewClient.h"
#include "WebSize.h"
#include "WebThread.h"

using namespace WebCore;

namespace WebKit {

PassRefPtr<WebLayerTreeViewImpl> WebLayerTreeViewImpl::create(WebLayerTreeViewClient* client, const WebLayer& root, const WebLayerTreeView::Settings& settings)
{
    RefPtr<WebLayerTreeViewImpl> host = adoptRef(new WebLayerTreeViewImpl(client, root, settings));
    if (!host->initialize())
        return 0;
    return host;
}

WebLayerTreeViewImpl::WebLayerTreeViewImpl(WebLayerTreeViewClient* client, const WebLayer& root, const WebLayerTreeView::Settings& settings) 
    : CCLayerTreeHost(this, root, settings)
    , m_client(client)
{
}

WebLayerTreeViewImpl::~WebLayerTreeViewImpl()
{
}

void WebLayerTreeViewImpl::animateAndLayout(double frameBeginTime)
{
    if (m_client)
        m_client->animateAndLayout(frameBeginTime);
}

void WebLayerTreeViewImpl::applyScrollDelta(const WebCore::IntSize& delta)
{
    if (m_client)
        m_client->applyScrollDelta(WebSize(delta));
}

PassRefPtr<GraphicsContext3D> WebLayerTreeViewImpl::createLayerTreeHostContext3D()
{
    if (!m_client)
        return 0;
    OwnPtr<WebGraphicsContext3D> webContext = adoptPtr(m_client->createContext3D());
    if (!webContext)
        return 0;

    WebGraphicsContext3D::Attributes webAttributes = webContext->getContextAttributes();
    GraphicsContext3D::Attributes attributes;
    attributes.alpha = webAttributes.alpha;
    attributes.depth = webAttributes.depth;
    attributes.stencil = webAttributes.stencil;
    attributes.antialias = webAttributes.antialias;
    attributes.premultipliedAlpha = webAttributes.premultipliedAlpha;
    attributes.canRecoverFromContextLoss = webAttributes.canRecoverFromContextLoss;
    attributes.noExtensions = webAttributes.noExtensions;
    attributes.shareResources = webAttributes.shareResources;
    attributes.preserveDrawingBuffer = false;

    GraphicsContext3D::RenderStyle style = GraphicsContext3D::RenderDirectlyToHostWindow;
    GraphicsContext3DPrivate::ThreadUsage usage = settings().enableCompositorThread ? GraphicsContext3DPrivate::ForUseOnAnotherThread : GraphicsContext3DPrivate::ForUseOnThisThread;
    return GraphicsContext3DPrivate::createGraphicsContextFromWebContext(webContext.release(), attributes, 0, style, usage);
}

void WebLayerTreeViewImpl::didRecreateGraphicsContext(bool success)
{
    if (m_client)
        m_client->didRebindGraphicsContext(success);
}

void WebLayerTreeViewImpl::scheduleComposite()
{
    if (m_client)
        m_client->scheduleComposite();
}

} // namespace WebKit
