/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Android code.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2009-2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Patrick Walton <pcwalton@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

package org.mozilla.gecko.gfx;

import org.mozilla.gecko.GeckoAppShell;
import org.mozilla.gecko.gfx.CairoImage;
import org.mozilla.gecko.gfx.CairoUtils;
import android.graphics.Bitmap;
import java.nio.ByteBuffer;

/** A Cairo image that simply saves a buffer of pixel data. */
public class BufferedCairoImage extends CairoImage {
    private ByteBuffer mBuffer;
    private IntSize mSize;
    private int mFormat;
    private boolean mNeedToFreeBuffer = false;

    /** Creates a buffered Cairo image from a byte buffer. */
    public BufferedCairoImage(ByteBuffer inBuffer, int inWidth, int inHeight, int inFormat) {
        mBuffer = inBuffer; mSize = new IntSize(inWidth, inHeight); mFormat = inFormat;
    }

    /** Creates a buffered Cairo image from an Android bitmap. */
    public BufferedCairoImage(Bitmap bitmap) {
        mFormat = CairoUtils.bitmapConfigToCairoFormat(bitmap.getConfig());
        mSize = new IntSize(bitmap.getWidth(), bitmap.getHeight());
        mNeedToFreeBuffer = true;
        // XXX Why is this * 4? Shouldn't it depend on mFormat?
        mBuffer = GeckoAppShell.allocateDirectBuffer(mSize.getArea() * 4);
        bitmap.copyPixelsToBuffer(mBuffer.asIntBuffer());
    }

     protected void finalize() throws Throwable {
        try {
            if (mNeedToFreeBuffer && mBuffer != null)
                GeckoAppShell.freeDirectBuffer(mBuffer);
            mNeedToFreeBuffer = false;
            mBuffer = null;
        } finally {
            super.finalize();
        }
    }

   @Override
    public ByteBuffer getBuffer() { return mBuffer; }
    @Override
    public IntSize getSize() { return mSize; }
    @Override
    public int getFormat() { return mFormat; }
}