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/*
* Copyright (C) 2012 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.
*/
#ifndef CCResourceProvider_h
#define CCResourceProvider_h
#include "GraphicsContext3D.h"
#include "IntSize.h"
#include <wtf/HashMap.h>
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
namespace WebKit {
class WebGraphicsContext3D;
}
namespace WebCore {
class CCGraphicsContext;
class CCScopedLockResourceForRead;
class CCScopedLockResourceForWrite;
class LayerTextureSubImage;
// Thread-safety notes: this class is not thread-safe and can only be called
// from the thread it was created on (in practice, the compositor thread).
class CCResourceProvider {
WTF_MAKE_NONCOPYABLE(CCResourceProvider);
public:
typedef unsigned ResourceId;
enum TextureUsageHint { TextureUsageAny, TextureUsageFramebuffer };
static PassOwnPtr<CCResourceProvider> create(CCGraphicsContext*);
virtual ~CCResourceProvider();
WebKit::WebGraphicsContext3D* graphicsContext3D();
int maxTextureSize() const { return m_maxTextureSize; }
unsigned numResources() const { return m_resources.size(); }
// Checks whether a resource is in use by a consumer.
bool inUseByConsumer(ResourceId);
// Producer interface.
// Creates a resource of the given size/format, into the given pool.
ResourceId createResource(int pool, const IntSize&, GC3Denum format, TextureUsageHint);
// Wraps an external texture into a resource.
ResourceId createResourceFromExternalTexture(unsigned textureId);
void deleteResource(ResourceId);
// Deletes all resources owned by a given pool.
void deleteOwnedResources(int pool);
// Upload data from image, copying sourceRect (in image) into destRect (in the resource).
void upload(ResourceId, const uint8_t* image, const IntRect& imageRect, const IntRect& sourceRect, const IntRect& destRect);
// Flush all context operations, kicking uploads and ensuring ordering with
// respect to other contexts.
void flush();
private:
friend class CCScopedLockResourceForRead;
friend class CCScopedLockResourceForWrite;
struct Resource {
unsigned glId;
int pool;
int lockForReadCount;
bool lockedForWrite;
bool external;
IntSize size;
GC3Denum format;
};
typedef HashMap<ResourceId, Resource> ResourceMap;
explicit CCResourceProvider(CCGraphicsContext*);
bool initialize();
// Gets a GL texture id representing the resource, that can be rendered into.
unsigned lockForWrite(ResourceId);
void unlockForWrite(ResourceId);
// Gets a GL texture id representing the resource, that can be rendered with.
unsigned lockForRead(ResourceId);
void unlockForRead(ResourceId);
CCGraphicsContext* m_context;
ResourceId m_nextId;
ResourceMap m_resources;
bool m_useTextureStorageExt;
bool m_useTextureUsageHint;
OwnPtr<LayerTextureSubImage> m_texSubImage;
int m_maxTextureSize;
};
class CCScopedLockResourceForRead {
WTF_MAKE_NONCOPYABLE(CCScopedLockResourceForRead);
public:
CCScopedLockResourceForRead(CCResourceProvider* resourceProvider, CCResourceProvider::ResourceId resourceId)
: m_resourceProvider(resourceProvider)
, m_resourceId(resourceId)
, m_textureId(resourceProvider->lockForRead(resourceId)) { }
~CCScopedLockResourceForRead()
{
m_resourceProvider->unlockForRead(m_resourceId);
}
unsigned textureId() const { return m_textureId; }
private:
CCResourceProvider* m_resourceProvider;
CCResourceProvider::ResourceId m_resourceId;
unsigned m_textureId;
};
class CCScopedLockResourceForWrite {
WTF_MAKE_NONCOPYABLE(CCScopedLockResourceForWrite);
public:
CCScopedLockResourceForWrite(CCResourceProvider* resourceProvider, CCResourceProvider::ResourceId resourceId)
: m_resourceProvider(resourceProvider)
, m_resourceId(resourceId)
, m_textureId(resourceProvider->lockForWrite(resourceId)) { }
~CCScopedLockResourceForWrite()
{
m_resourceProvider->unlockForWrite(m_resourceId);
}
unsigned textureId() const { return m_textureId; }
private:
CCResourceProvider* m_resourceProvider;
CCResourceProvider::ResourceId m_resourceId;
unsigned m_textureId;
};
}
#endif
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