/*
 * Copyright 2011, The Android Open Source Project
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER OR
 * 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 ImagesManager_h
#define ImagesManager_h

#include "HashMap.h"
#include "SkBitmap.h"
#include "SkBitmapRef.h"
#include "SkRefCnt.h"
#include "Vector.h"

#include <utils/threads.h>

namespace WebCore {

class ImageTexture;
class GLWebViewState;

class ImagesManager {
public:
    static ImagesManager* instance();

    ImageTexture* setImage(SkBitmapRef* imgRef);
    ImageTexture* retainImage(unsigned imgCRC);
    void releaseImage(unsigned imgCRC);

    // should be called only by ~ImageTexture()
    void onImageTextureDestroy(unsigned imgCRC);

    bool prepareTextures(GLWebViewState*);
    int nbTextures();

private:
    ImagesManager() {}

    static ImagesManager* gInstance;

    android::Mutex m_imagesLock;
    HashMap<unsigned, ImageTexture*> m_images;
};

} // namespace WebCore

#endif // ImagesManager