GLBase.java

/**
 * Copyright 2008 - 2015 The Loon Game Engine Authors
 * 
 * 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 0.5
 */
package loon.opengl;

import loon.LRelease;

public abstract class GLBase implements LRelease {

	public boolean begun;

	public abstract void init();

	public abstract void freeBuffer();

	public boolean running() {
		return begun;
	}

	public void begin(float fbufWidth, float fbufHeight, boolean flip) {
		if (begun) {
			throw new IllegalStateException(getClass().getSimpleName()
					+ " mismatched begin()");
		}
		begun = true;
	}

	public void flush() {

	}

	public void end() {
		try {
			flush();
		} catch (Exception ex) {
			ex.printStackTrace();
		} finally {
			begun = false;
		}

	}

	@Override
	public void close() {
		if (begun) {
			throw new IllegalStateException(getClass().getSimpleName()
					+ " close() without end()");
		}
	}
}