package destr.jogl.game2d;

import java.awt.Dimension;

import javax.media.opengl.GL2;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.awt.GLCanvas;

import com.jogamp.opengl.util.FPSAnimator;

public abstract class Game2DCanvas extends GLCanvas implements GLEventListener {
	private static final long serialVersionUID = -4271027726165395673L;
	protected int width;
	protected int height;
	protected final FPSAnimator animator;
	public Game2DCanvas(int width, int height){
		this.width = width;
		this.height = height;
		
		this.addGLEventListener(this);
		this.setPreferredSize(new Dimension(width, height));
		
		animator = new FPSAnimator(this, 100/*FPS*/, true);
		animator.start();
	}
	@Override
	public void dispose(GLAutoDrawable drawable) {
		//...
	}
	@Override
	public void init(GLAutoDrawable drawable) {
		GL2 gl2 = drawable.getGL().getGL2();
		gl2.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
		gl2.glMatrixMode(GL2.GL_MODELVIEW);
		gl2.glDisable(GL2.GL_DEPTH_TEST);
		gl2.glBlendFunc (GL2.GL_SRC_ALPHA, GL2.GL_ONE_MINUS_SRC_ALPHA); 
		gl2.glEnable (GL2.GL_BLEND);
	}
	@Override
	public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
		GL2 gl2 = drawable.getGL().getGL2();
		this.width = width;
		this.height = height;
		gl2.glOrtho(0, width, height, 0, 0, 1);
	}
}