/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef WebCore_BitmapAllocatorAndroid_DEFINED
#define WebCore_BitmapAllocatorAndroid_DEFINED

#include "SkBitmap.h"

namespace WebCore {

    class SharedBuffer;
    class SharedBufferStream;

    /** Returns a custom allocator that takes advantage of ashmem and global
        pools to best manage the pixel memory for a decoded image. This should
        be used for images that are logically immutable, and can be re-decoded
        at will based on available memory.
     */
    class BitmapAllocatorAndroid : public SkBitmap::Allocator {
    public:
        BitmapAllocatorAndroid(SharedBuffer* data, int sampleSize);
        virtual ~BitmapAllocatorAndroid();

        // overrides
        virtual bool allocPixelRef(SkBitmap*, SkColorTable*);

    private:
        SharedBufferStream* fStream;
        int                 fSampleSize;
    };

}

#endif