FontAlphaBlend.java

/**
 *  The MIT License (MIT)
 *
 *  Copyright (c) 2014 momokan (http://lwjgfont.chocolapod.net)
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *  SOFTWARE.
 */
package net.chocolapod.lwjgfont.texture;

import static org.lwjgl.opengl.GL11.GL_ONE;
import static org.lwjgl.opengl.GL11.GL_ONE_MINUS_DST_COLOR;
import static org.lwjgl.opengl.GL11.GL_ONE_MINUS_SRC_ALPHA;
import static org.lwjgl.opengl.GL11.GL_SRC_ALPHA;
import static org.lwjgl.opengl.GL11.GL_SRC_COLOR;
import static org.lwjgl.opengl.GL11.GL_ZERO;
import static org.lwjgl.opengl.GL11.glBlendFunc;
 
enum FontAlphaBlend {
	AlphaBlend {
		@Override
		public void config() {
			//  アルファ合成
			glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
		}
	},
	Add {
		@Override
		public void config() {
			//  加算合成
			glBlendFunc(GL_SRC_ALPHA, GL_ONE);
		}
	},
	Multiple {
		@Override
		public void config() {
			//  乗算合成
			glBlendFunc(GL_ZERO, GL_SRC_COLOR);
		}
	},
	Screen {
		@Override
		public void config() {
			//  スクリーン合成
			glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ONE);
		}
	},
	Reverse {
		@Override
		public void config() {
			//  反転合成
			glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ZERO);
		}
	}
	;
	 
	public abstract void config();
}