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import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

public class EGA {
	
	private static final int[] HEX_VALUES = new int[]{
		0x000000, 0x0000aa, 0x00aa00, 0x00aaaa, 0xaa0000, 0xaa00aa, 0xaaaa00, 0xaaaaaa,
		0x000055, 0x0000ff, 0x00aa55, 0x00aaff, 0xaa0055, 0xaa00ff, 0xaaaa55, 0xaaaaff,
		0x005500, 0x0055aa, 0x00ff00, 0x00ffaa, 0xaa5500, 0xaa55aa, 0xaaff00, 0xaaffaa,
		0x005555, 0x0055ff, 0x00ff55, 0x00ffff, 0xaa5555, 0xaa55ff, 0xaaff55, 0xaaffff,
		0x550000, 0x5500aa, 0x55aa00, 0x55aaaa, 0xff0000, 0xff00aa, 0xffaa00, 0xffaaaa,
		0x550055, 0x5500ff, 0x55aa55, 0x55aaff, 0xff0055, 0xff00ff, 0xffaa55, 0xffaaff,
		0x555500, 0x5555aa, 0x55ff00, 0x55ffaa, 0xff5500, 0xff55aa, 0xffff00, 0xffffaa,
		0x555555, 0x5555ff, 0x55ff55, 0x55ffff, 0xff5555, 0xff55ff, 0xffff55, 0xffffff
	};
	
	private static final Color[] COLORS = new Color[64];
	
	static {
		for(int i = 0; i < HEX_VALUES.length; i++){
			COLORS[i] = new Color(HEX_VALUES[i]);
		}
	}

	//Test code for generating an image of the colors
	public static void main(String[] args) throws Exception {
		final BufferedImage img = new BufferedImage(128, 32*64, BufferedImage.TYPE_INT_RGB);
		final Graphics gfx = img.getGraphics();
		
		for(int i = 0; i < COLORS.length; i++){
			gfx.setColor(COLORS[i]);
			gfx.fillRect(0, i*32, 128, 32);
			
			//Find opposite color so it isn't unreadable on some colors
			final Color textColor = new Color(255-COLORS[i].getRed(), 255-COLORS[i].getGreen(), 255-COLORS[i].getBlue());
			gfx.setColor(textColor);
			gfx.drawString(String.valueOf(i), 8, i*32+20);
		}
		
		gfx.dispose();
		
		ImageIO.write(img, "PNG", new File("ega_colors.png"));
	}
}