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/*
* Copyright (C) 2010, 2011, 2012 Research In Motion Limited. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef SurfacePool_h
#define SurfacePool_h
#include "BackingStoreTile.h"
#include "PlatformContextSkia.h"
#include <BlackBerryPlatformGraphics.h>
#include <BlackBerryPlatformPrimitives.h>
#include <pthread.h>
#include <set>
#include <wtf/Vector.h>
#define ENABLE_COMPOSITING_SURFACE 1
namespace BlackBerry {
namespace WebKit {
class BackingStoreCompositingSurface;
class SurfacePool {
public:
static SurfacePool* globalSurfacePool();
void initialize(const BlackBerry::Platform::IntSize&);
int isActive() const { return !m_tilePool.isEmpty() && !m_buffersSuspended; }
int isEmpty() const { return m_tilePool.isEmpty(); }
int size() const { return m_tilePool.size(); }
typedef WTF::Vector<BackingStoreTile*> TileList;
const TileList tileList() const { return m_tilePool; }
PlatformGraphicsContext* createPlatformGraphicsContext(BlackBerry::Platform::Graphics::Drawable*) const;
PlatformGraphicsContext* lockTileRenderingSurface() const;
void releaseTileRenderingSurface(PlatformGraphicsContext*) const;
BackingStoreTile* visibleTileBuffer() const { return m_visibleTileBuffer; }
void initializeVisibleTileBuffer(const BlackBerry::Platform::IntSize&);
// This is a shared back buffer that is used by all the tiles since
// only one tile will be rendering it at a time and we invalidate
// the whole tile every time we render by copying from the front
// buffer those portions that we don't render. This allows us to
// have N+1 tilebuffers rather than N*2 for our double buffered
// backingstore.
TileBuffer* backBuffer() const;
BackingStoreCompositingSurface* compositingSurface() const;
void notifyScreenRotated();
std::string sharedPixmapGroup() const;
void releaseBuffers();
void createBuffers();
// EGLImage synchronization between WebKit and compositing threads
// TODO: Figure out how to improve the BlackBerry::Platform::Graphics with API that can encapsulate
// this kind of synchronisation mechanism.
// WebKit thread must waitForBuffer() before rendering to EGLImage
void waitForBuffer(TileBuffer*);
// Compositing thread must notify the SurfacePool when EGLImages are composited
void notifyBuffersComposited(const Vector<TileBuffer*>& buffers);
private:
// This is necessary so BackingStoreTile can atomically swap buffers with m_backBuffer.
friend class BackingStoreTile;
SurfacePool();
TileList m_tilePool;
BackingStoreTile* m_visibleTileBuffer;
#if USE(ACCELERATED_COMPOSITING)
RefPtr<BackingStoreCompositingSurface> m_compositingSurface;
#endif
BlackBerry::Platform::Graphics::Buffer* m_tileRenderingSurface;
unsigned m_backBuffer;
bool m_initialized; // SurfacePool has been set up, with or without buffers.
bool m_buffersSuspended; // Buffer objects exist, but pixel memory has been freed.
std::set<void*> m_garbage;
bool m_hasFenceExtension;
mutable pthread_mutex_t m_mutex;
};
}
}
#endif // SurfacePool_h
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