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/*
* Copyright (C) 2011, 2012, 2013 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 LayerTiler_h
#define LayerTiler_h
#if USE(ACCELERATED_COMPOSITING)
#include "FloatRect.h"
#include "IntRect.h"
#include "LayerCompositingThreadClient.h"
#include "LayerTile.h"
#include "LayerTileIndex.h"
#include <BlackBerryPlatformGLES2Program.h>
#include <wtf/Deque.h>
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/ThreadSafeRefCounted.h>
namespace WebCore {
class LayerCompositingThread;
class LayerVisibility;
class LayerWebKitThread;
class LayerTiler : public ThreadSafeRefCounted<LayerTiler>, public LayerCompositingThreadClient {
public:
TileIndex indexOfTile(const IntPoint& origin);
IntPoint originOfTile(const TileIndex&);
IntRect rectForTile(const TileIndex&, const IntSize& bounds);
static PassRefPtr<LayerTiler> create(LayerWebKitThread* layer)
{
return adoptRef(new LayerTiler(layer));
}
virtual ~LayerTiler();
IntSize tileSize() const { return m_tileSize; }
// WebKit thread
LayerWebKitThread* layer() const { return m_layer; }
void layerWebKitThreadDestroyed();
void setNeedsDisplay(const FloatRect& dirtyRect);
void setNeedsDisplay();
void updateTextureContentsIfNeeded(double scale);
void setNeedsBacking(bool);
virtual void scheduleCommit();
// Compositing thread
virtual void layerCompositingThreadDestroyed(LayerCompositingThread*);
virtual void layerVisibilityChanged(LayerCompositingThread*, bool visible);
virtual void uploadTexturesIfNeeded(LayerCompositingThread*);
virtual LayerTexture* contentsTexture(LayerCompositingThread*);
virtual void drawTextures(LayerCompositingThread*, const BlackBerry::Platform::Graphics::GLES2Program&, double scale, const FloatRect& clipRect);
virtual void deleteTextures(LayerCompositingThread*);
static void willCommit();
virtual void commitPendingTextureUploads(LayerCompositingThread*);
private:
struct TextureJob {
enum Type { Unknown, SetContents, UpdateContents, ResizeContents, DirtyContents };
TextureJob()
: m_type(Unknown)
, m_contents(0)
{
}
TextureJob(Type type, const IntSize& newSize)
: m_type(type)
, m_contents(0)
, m_dirtyRect(IntPoint::zero(), newSize)
{
ASSERT(type == ResizeContents);
}
TextureJob(Type type, const IntRect& dirtyRect)
: m_type(type)
, m_contents(0)
, m_dirtyRect(dirtyRect)
{
ASSERT(type == DirtyContents);
}
TextureJob(Type type, BlackBerry::Platform::Graphics::Buffer* contents, const IntRect& dirtyRect)
: m_type(type)
, m_contents(contents)
, m_dirtyRect(dirtyRect)
{
ASSERT(type == UpdateContents || type == SetContents);
ASSERT(contents);
}
static TextureJob setContents(BlackBerry::Platform::Graphics::Buffer* contents, const IntRect& contentsRect)
{
return TextureJob(SetContents, contents, contentsRect);
}
static TextureJob updateContents(BlackBerry::Platform::Graphics::Buffer* contents, const IntRect& dirtyRect) { return TextureJob(UpdateContents, contents, dirtyRect); }
static TextureJob resizeContents(const IntSize& newSize) { return TextureJob(ResizeContents, newSize); }
static TextureJob dirtyContents(const IntRect& dirtyRect) { return TextureJob(DirtyContents, dirtyRect); }
bool isNull() { return m_type == Unknown; }
Type m_type;
BlackBerry::Platform::Graphics::Buffer* m_contents;
IntRect m_dirtyRect;
TileIndex m_index;
};
typedef HashMap<TileIndex, LayerTile*> TileMap;
typedef HashMap<TileIndex, const TextureJob*> TileJobsMap;
LayerTiler(LayerWebKitThread*);
// Swaps in a new front visibility and returns the current one, atomically.
LayerVisibility* swapFrontVisibility(LayerVisibility*);
// WebKit thread
void updateTileSize();
void addTextureJob(const TextureJob&);
void clearTextureJobs();
BlackBerry::Platform::Graphics::Buffer* createBuffer(const IntSize&);
LayerVisibility* takeFrontVisibility() { return swapFrontVisibility(0); }
// Compositing thread
void updateTileContents(const TextureJob&, const IntRect&);
void addTileJob(const TileIndex&, const TextureJob&, TileJobsMap&);
void performTileJob(LayerCompositingThread*, LayerTile*, const TextureJob&);
void processTextureJob(const TextureJob&, TileJobsMap&);
void pruneTextures();
void visibilityChanged(bool needsDisplay);
bool drawTile(LayerCompositingThread*, LayerTile*, const TileIndex&, double scale, const FloatRect& dst, const FloatRect& dstClip);
void setFrontVisibility(const FloatRect& visibleRect, HashSet<TileIndex>& tilesNeedingRender);
// Clear all pending update content texture jobs
template<typename T>
static void removeUpdateContentsJobs(T& jobs)
{
// Clear all pending update content jobs
T list;
for (typename T::iterator it = jobs.begin(); it != jobs.end(); ++it) {
if ((*it).m_type != TextureJob::UpdateContents)
list.append(*it);
else
BlackBerry::Platform::Graphics::destroyBuffer((*it).m_contents);
}
jobs = list;
}
LayerWebKitThread* m_layer;
TileMap m_tiles;
bool m_needsBacking;
bool m_contentsDirty;
FloatRect m_dirtyRect;
IntSize m_pendingTextureSize; // Resized, but not committed yet.
IntSize m_requiredTextureSize;
IntSize m_tileSize;
bool m_clearTextureJobs;
Vector<TextureJob> m_pendingTextureJobs; // Added, but not committed yet.
Deque<TextureJob> m_textureJobs;
LayerVisibility* m_frontVisibility;
LayerVisibility* m_backVisibility;
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif // LayerTiler_h
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