Subj : Re: Printing on Commodore printer without Commodore 64
To   : All
From : sblendorio@gmail.com
Date : Mon May 07 2018 14:35:41

Il giorno lunedì 7 maggio 2018 15:54:00 UTC+2, sblen...@gmail.com ha scritto:

> Printing text is quite simple.

You can also print graphics. This is an example of what you can do:
https://imgur.com/a/gyxkkqk

I did it writing a simple "driver" in Java that converts images (for now in
black and white, with white background) into commands for the Commodore MPS 803
 printer:


package eu.sblendorio;

import javax.imageio.ImageIO;
import java.awt.image.*;
import java.io.File;
import java.io.IOException;

public class Main {

    public static void main(String[] args) throws IOException {
        if (args.length == 0) System.exit(1);
        final String filename = args[0];
        File f = new File(filename);
        BufferedImage bi = ImageIO.read(f);

        print(bi);
    }

    static int getPixel(BufferedImage bi, int x, int y) {
        final int w = bi.getWidth();
        final int h = bi.getHeight();

        if (x >= w || y >= h || x < 0 || y < 0)
            return 0;

        final boolean pixel = bi.getRGB(x, y) != -1;
        return pixel ? 1 : 0;
    }

    static void print(BufferedImage bi) {
        final int pow[] = {1, 2, 4, 8, 16, 32, 64};
        final int w = bi.getWidth();
        final int h = bi.getHeight();
        int rows = h / 7 + (h % 7 == 0 ? 0 : 1);
        System.out.write(8);
        for (int row=0; row<rows; ++row) {
            for (int x=0; x<w; ++x) {
                int code = 128;
                for (int dy=0; dy<7; ++dy) {
                    final int pixel = getPixel(bi, x,(row * 7) + dy);
                    code += pow[dy]*pixel;
                }
                System.out.write(code);
            }
            System.out.write(13);
        }
        System.out.write(15);
        System.out.write(13);
    }
}

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