Draw image with select background and foreground color

[maseck]

I'm making a enhanced ASCII interface. I have encountered a problem.

I must put a image of color X on a background of color Y efficiently.

example
http://www.shnetworks4.net/~asciiwor...turntokroz.gif
look a the C in red or the double ~

A tileset like this one http://img143.imageshack.us/img143/4869/jasciitiles.png will be used. Each tile is 16x16. The areas that are white will become color X. Grays should became less color X, but this may not be an option.

I think this pertains to the use of the graphic's XOR mode.

[DarrylBurke]

Looks like link spam to gaming sites to me. Abuse reported.

db

[maseck]

I had no intention of advertisement. One mistake I made was putting the link at the end and not next to what it referenced. I moved the link closer to what it was a reference to. I also removed one of the links. I use links often because I have poor skills with communicating ideas.

I am sorry if I caused any distress but I am also frustrated.

---------------------
EDIT: I made some code that works but it causes an error (Class Cast Exception). The change that caused this error was drawing the image a second time. I also wish to know if my implementation is efficient.

You will need this image with the magenta background.

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JApplet;

public class JASCIITest extends JApplet
{
	BufferedImage images;
	static Color imageBack = new Color(255, 0, 255);
	
	public void init()
	{
		try
		{
			images = ImageIO.read(new File("jasciitiles.PNG").toURI().toURL());
		} catch (IOException e){
			e.printStackTrace();
		}
		images = applyMask(images, imageBack);
		images = resize(images, images.getWidth()*4, images.getHeight()*4);
	}
	
	public void paint(Graphics g)
	{
		//this works but not sure if it's the best way
		Color tileBack = Color.CYAN,
		tileFore = Color.GREEN;
		
		g.setColor(Color.WHITE);
		g.setXORMode(tileFore);
		g.drawImage(images, 0, 0, null);
		g.setXORMode(tileBack);
		g.drawImage(images, 0, 0, null);
		g.fillRect(0, 0, images.getWidth(), images.getHeight());
		g.setPaintMode();
	}

	/*
	 * THESE ARE FINE, HERE FOR COMPILING
	 * DID NOT WRITE
	 * FROM GTGE (LEGAL OBLIGATION)
	 */
	public static BufferedImage applyMask(Image img, Color keyColor) {
		BufferedImage alpha = createImage(img.getWidth(null), img
				.getHeight(null), Transparency.BITMASK);
		
		Graphics2D g = alpha.createGraphics();
		g.setComposite(AlphaComposite.Src);
		g.drawImage(img, 0, 0, null);
		g.dispose();
		
		for (int y = 0; y < alpha.getHeight(); y++) {
			for (int x = 0; x < alpha.getWidth(); x++) {
				int col = alpha.getRGB(x, y);
				if (col == keyColor.getRGB()) {
					// make transparent
					alpha.setRGB(x, y, col & 0x00ffffff);
				}
			}
		}
		
		return alpha;
	}
	
	public static BufferedImage resize(BufferedImage src, int w, int h) {
		int transparency = src.getColorModel().getTransparency();
		BufferedImage image = createImage(w, h, transparency);
		
		Graphics2D g = image.createGraphics();
		//g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
		//		RenderingHints.VALUE_INTERPOLATION_BILINEAR);
		g.drawImage(src, 0, 0, w, h, // destination
				0, 0, src.getWidth(), src.getHeight(), // source
				null);
		g.dispose();
		
		return image;
	}
	
	public static final GraphicsConfiguration CONFIG = GraphicsEnvironment
	.getLocalGraphicsEnvironment().getDefaultScreenDevice()
	.getDefaultConfiguration();
	
	public static BufferedImage createImage(int width, int height, int transparency) {
		return CONFIG.createCompatibleImage(width, height,
				transparency);
	}
}

[DarrylBurke]

I had no intention of advertisement.

Fair enough. Please accept my apologies.

You will need the image with the magenta background I posted in the first post.

And the AdvImageUtil class and maybe something more -- I stop reading code when it becomes apparent that it can't be compiled and run. To get better help sooner, post a SSCCE that clearly demonstrates your problem. And go through that link before you post it.

db

[maseck]

Okay, I fixed my mistake... I also read that web-page completely, should be good.