/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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 * The Original Code is Mozilla Android code.
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 * The Initial Developer of the Original Code is Mozilla Foundation.
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 * Contributor(s):
 *   Patrick Walton <pcwalton@mozilla.com>
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package org.mozilla.gecko.gfx;

import javax.microedition.khronos.opengles.GL10;
import java.util.ArrayList;

/** Manages a list of dead tiles, so we don't leak resources. */
public class TextureReaper {
    private static TextureReaper sSharedInstance;
    private ArrayList<Integer> mDeadTextureIDs;

    private TextureReaper() { mDeadTextureIDs = new ArrayList<Integer>(); }

    public static TextureReaper get() {
        if (sSharedInstance == null)
            sSharedInstance = new TextureReaper();
        return sSharedInstance;
    }

    public void add(int[] textureIDs) {
        for (int textureID : textureIDs)
            add(textureID);
    }

    public void add(int textureID) {
        mDeadTextureIDs.add(textureID);
    }

    public void reap(GL10 gl) {
        int[] deadTextureIDs = new int[mDeadTextureIDs.size()];
        for (int i = 0; i < deadTextureIDs.length; i++)
            deadTextureIDs[i] = mDeadTextureIDs.get(i);
        mDeadTextureIDs.clear();

        gl.glDeleteTextures(deadTextureIDs.length, deadTextureIDs, 0);
    }
}


