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/*
* 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 "SharedGraphicsContext3D.h"
#include "Extensions3D.h"
#include <wtf/MainThread.h>
namespace WebCore {
class SharedGraphicsContext3DImpl {
public:
SharedGraphicsContext3DImpl() : m_context(0) { }
PassRefPtr<GraphicsContext3D> getOrCreateContext()
{
bool wasCreated = false;
// If we lost the context, or can't make it current, create a new one.
if (m_context && (!m_context->makeContextCurrent() || (m_context->getExtensions()->getGraphicsResetStatusARB() != GraphicsContext3D::NO_ERROR)))
m_context.clear();
if (!m_context) {
createContext();
wasCreated = true;
}
if (m_context && !m_context->makeContextCurrent())
m_context.clear();
if (m_context && wasCreated)
m_context->getExtensions()->pushGroupMarkerEXT("SharedGraphicsContext");
return m_context;
}
PassRefPtr<GraphicsContext3D> getContext()
{
return m_context;
}
PassRefPtr<GraphicsContext3D> createContext()
{
GraphicsContext3D::Attributes attributes;
attributes.depth = false;
attributes.stencil = true;
attributes.antialias = false;
attributes.shareResources = true;
m_context = GraphicsContext3D::create(attributes, 0);
return m_context;
}
private:
RefPtr<GraphicsContext3D> m_context;
};
PassRefPtr<GraphicsContext3D> SharedGraphicsContext3D::get()
{
DEFINE_STATIC_LOCAL(SharedGraphicsContext3DImpl, impl, ());
return impl.getOrCreateContext();
}
enum ContextOperation {
Get, Create
};
static PassRefPtr<GraphicsContext3D> getOrCreateContextForImplThread(ContextOperation op)
{
DEFINE_STATIC_LOCAL(SharedGraphicsContext3DImpl, impl, ());
return op == Create ? impl.createContext() : impl.getContext();
}
PassRefPtr<GraphicsContext3D> SharedGraphicsContext3D::getForImplThread()
{
return getOrCreateContextForImplThread(Get);
}
bool SharedGraphicsContext3D::haveForImplThread()
{
ASSERT(isMainThread());
return getOrCreateContextForImplThread(Get);
}
bool SharedGraphicsContext3D::createForImplThread()
{
ASSERT(isMainThread());
return getOrCreateContextForImplThread(Create);
}
}
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