/**
	Company:		Shout3D LLC
	Project:		Shout3D Core
	Class:			TestEffect
	Date:			March 23, 2000
	Description:	A simple example of a PostRenderEffect that inverts the colors of the scene and adds some text on top.
	(C) Copyright Shout3D LLC. - 1997-2001 - All rights reserved
 */

package custom_nodes;
import shout3d.core.*;
import shout3d.*;
import shout3d.core.awt.*;
import java.awt.*;
import java.awt.image.*;

/**
 * TestEffect
 *
 * @author Dave Westwood
 */

public class InvertPlusTextEffect extends PostRenderEffect{

	/**
	 * Constructs a default InvertPlusTextEffect node.
	 */
	public InvertPlusTextEffect() {}

	int[] defaultStartPosition = { 160, 0 };
	int[] defaultTextVelocity  = { 0,   10 };

	final public    BooleanField	invertEnabled	= new BooleanField(this, "invertEnabled",  Field.ANY, true);
	final public    StringField		overlayText		= new StringField(this, "overlayText",  Field.ANY, "WAZZUP!");
	final public    IntArrayField	startPosition	= new IntArrayField(this, "startPosition",  Field.ANY, defaultStartPosition);
	final public    IntArrayField	textVelocity	= new IntArrayField(this, "textVelocity",  Field.ANY, defaultTextVelocity);

	Font bigFont = new Font("Arial", Font.BOLD, 30);
	int x, y = 0;
	int xVelo = 0;
	int yVelo = 10;
	boolean firstTime = true;

	public void filter(Graphics g, int surface_pixel_bits[], float z_buffer[], int deviceWidth, int deviceHeight) {
		if (surface_pixel_bits == null)
			return;

		// Invert
		if (invertEnabled.getValue()) {
			for (int i=0;i<surface_pixel_bits.length;i++) {
			    surface_pixel_bits[i] = 0xff000000 +
			                            ((255-((surface_pixel_bits[i]>>16)&0xff))<<16) +    // invert red
			                            ((255-((surface_pixel_bits[i]>>8)&0xff))<<8) +      // invert green
			                            ((255-((surface_pixel_bits[i])&0xff)));             // invert blue
			}
		}

		// initialize position and velocity
		if (firstTime && startPosition.getValue() != null && startPosition.getValue().length > 1) {
			x = startPosition.getValue()[0];
			y = startPosition.getValue()[1];
		}
		if (firstTime && textVelocity.getValue() != null && textVelocity.getValue().length > 1){
			xVelo = textVelocity.getValue()[0];
			yVelo = textVelocity.getValue()[1];
		}
		firstTime = false;

		// Draw some text
		g.setFont(bigFont);
		g.setColor(java.awt.Color.green);
		if (x > deviceWidth)
			x = 0;
		else if (x < 0)
			x = deviceWidth;
		else
			x+= xVelo;

		if (y > deviceHeight)
			y = 0;
		else if (y < 0)
			y = deviceHeight;
		else
			y+= yVelo;
		g.drawString(overlayText.getValue(), x, y);

    }
}