TrackingTextureAllocator.h   [plain text]


/*
 * 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
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 * 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 INC. 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 INC. 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;
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#ifndef TrackingTextureAllocator_h
#define TrackingTextureAllocator_h

#include "GraphicsContext3D.h"
#include "TextureManager.h"
#include <wtf/PassRefPtr.h>

namespace WebCore {

class TrackingTextureAllocator : public TextureAllocator {
    WTF_MAKE_NONCOPYABLE(TrackingTextureAllocator);
public:
    static PassOwnPtr<TrackingTextureAllocator> create(PassRefPtr<GraphicsContext3D> context)
    {
        return adoptPtr(new TrackingTextureAllocator(context));
    }
    virtual ~TrackingTextureAllocator();

    virtual unsigned createTexture(const IntSize&, GC3Denum format);
    virtual void deleteTexture(unsigned texture, const IntSize&, GC3Denum format);

    size_t currentMemoryUseBytes() const { return m_currentMemoryUseBytes; }

    enum TextureUsageHint { Any, FramebufferAttachment };

    void setTextureUsageHint(TextureUsageHint hint) { m_textureUsageHint = hint; }
    void setUseTextureStorageExt(bool useStorageExt) { m_useTextureStorageExt = useStorageExt; }

protected:
    explicit TrackingTextureAllocator(PassRefPtr<GraphicsContext3D>);

    RefPtr<GraphicsContext3D> m_context;
    size_t m_currentMemoryUseBytes;
    TextureUsageHint m_textureUsageHint;
    bool m_useTextureStorageExt;
};

}

#endif