LColorPool.java

/**
 * Copyright 2008 - 2012
 * 
 * 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.
 * 
 * @project loon
 * @author cping
 * @email：javachenpeng@yahoo.com
 * @version 0.3.3
 */
package loon.canvas;

import loon.LRelease;
import loon.LSystem;
import loon.utils.IntMap;

public class LColorPool implements LRelease {

	private static LColorPool pool;

	public static LColorPool get() {
		synchronized (LColorPool.class) {
			if (pool == null) {
				pool = new LColorPool();
			}
		}
		return pool;
	}

	private final LColor AlphaColor = new LColor(0f, 0f, 0f, 0f);

	private IntMap<LColor> ColorMap = new IntMap<LColor>();

	public LColor getColor(float r, float g, float b, float a) {
		if (a <= 0.1f) {
			return AlphaColor;
		}
		int hashCode = 1;
		hashCode = LSystem.unite(hashCode, r);
		hashCode = LSystem.unite(hashCode, g);
		hashCode = LSystem.unite(hashCode, b);
		hashCode = LSystem.unite(hashCode, a);
		LColor color = ColorMap.get(hashCode);
		if (color == null) {
			color = new LColor(r, g, b, a);
			ColorMap.put(hashCode, color);
		}
		return color;
	}

	public LColor getColor(int c) {
		LColor color = ColorMap.get(c);
		if (color == null) {
			color = new LColor(c);
			ColorMap.put(c, color);
		}
		return color;
	}

	public LColor getColor(float r, float g, float b) {
		return getColor(r, g, b, 1f);
	}

	public LColor getColor(int r, int g, int b, int a) {
		if (a <= 10) {
			return AlphaColor;
		}
		int hashCode = 1;
		hashCode = LSystem.unite(hashCode, r);
		hashCode = LSystem.unite(hashCode, g);
		hashCode = LSystem.unite(hashCode, b);
		hashCode = LSystem.unite(hashCode, a);
		LColor color = ColorMap.get(hashCode);
		if (color == null) {
			color = new LColor(r, g, b, a);
			ColorMap.put(hashCode, color);
		}
		return color;
	}

	public LColor getColor(int r, int g, int b) {
		return getColor(r, g, b, 1f);
	}

	@Override
	public void close() {
		if (ColorMap != null) {
			ColorMap.clear();
		}
	}
}