/*
 * 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 "cc/CCLayerTreeHost.h"
#include "cc/CCThreadProxy.h"
#include "platform/WebGraphicsContext3D.h"
#include "platform/WebLayer.h"
#include "platform/WebLayerTreeView.h"
#include "platform/WebLayerTreeViewClient.h"
#include "platform/WebSize.h"
#include "platform/WebThread.h"

using namespace WebCore;

namespace WebKit {

// Converts messages from CCLayerTreeHostClient to WebLayerTreeViewClient.
class WebLayerTreeViewClientAdapter : public WebCore::CCLayerTreeHostClient {
public:
    WebLayerTreeViewClientAdapter(WebLayerTreeViewClient* client) : m_client(client) { }
    virtual ~WebLayerTreeViewClientAdapter() { }

    // CCLayerTreeHostClient implementation
    virtual void willBeginFrame() OVERRIDE { m_client->willBeginFrame(); }
    virtual void didBeginFrame() OVERRIDE { m_client->didBeginFrame(); }
    virtual void updateAnimations(double monotonicFrameBeginTime) OVERRIDE { m_client->updateAnimations(monotonicFrameBeginTime); }
    virtual void layout() OVERRIDE { m_client->layout(); }
    virtual void applyScrollAndScale(const WebCore::IntSize& scrollDelta, float pageScale) OVERRIDE { m_client->applyScrollAndScale(scrollDelta, pageScale); }
    virtual PassRefPtr<WebCore::GraphicsContext3D> createContext() OVERRIDE
    {
        OwnPtr<WebGraphicsContext3D> webContext = adoptPtr(m_client->createContext3D());
        if (!webContext)
            return 0;
        return GraphicsContext3DPrivate::createGraphicsContextFromWebContext(webContext.release(), GraphicsContext3D::RenderDirectlyToHostWindow, false /* preserveDrawingBuffer */ );
    }
    virtual void didRecreateContext(bool success) OVERRIDE { m_client->didRebindGraphicsContext(success); }
    virtual void willCommit() OVERRIDE { m_client->willCommit(); }
    virtual void didCommit() OVERRIDE { m_client->didCommit(); }
    virtual void didCommitAndDrawFrame() OVERRIDE { m_client->didCommitAndDrawFrame(); }
    virtual void didCompleteSwapBuffers() OVERRIDE { m_client->didCompleteSwapBuffers(); }
    virtual void scheduleComposite() OVERRIDE { m_client->scheduleComposite(); }

private:
    WebLayerTreeViewClient* m_client;
};

PassOwnPtr<WebLayerTreeViewImpl> WebLayerTreeViewImpl::create(WebLayerTreeViewClient* client, const WebLayer& root, const WebLayerTreeView::Settings& settings)
{
    OwnPtr<WebLayerTreeViewImpl> impl = adoptPtr(new WebLayerTreeViewImpl(client, settings));
    if (!impl->layerTreeHost())
        return nullptr;
    impl->layerTreeHost()->setRootLayer(root);
    return impl.release();
}

WebLayerTreeViewImpl::WebLayerTreeViewImpl(WebLayerTreeViewClient* client, const WebLayerTreeView::Settings& settings) 
    : m_clientAdapter(adoptPtr(new WebLayerTreeViewClientAdapter(client)))
    , m_layerTreeHost(CCLayerTreeHost::create(m_clientAdapter.get(), settings))
{
}

WebLayerTreeViewImpl::~WebLayerTreeViewImpl()
{
}

} // namespace WebKit