Block PETSCII Graphics for BBS

gistfile1.txt

package eu.sblendorio.bbs.demo;

import eu.sblendorio.bbs.core.AsciiThread;
import eu.sblendorio.bbs.core.Hidden;
import eu.sblendorio.bbs.core.PetsciiThread;

@Hidden // THIS CLASS IS ONLY FOR EXPERIMENTS
public class GardaconBlockExperiment extends AsciiThread {


    int[][] matrix = {
            {1,1,1,1,1,1,1,1,1},
            {1,0,1,0,1,0,0,0,1},
            {1,0,1,0,0,1,0,0,1},
            {1,0,1,0,0,0,1,0,1},
            {1,1,1,1,1,1,1,1,1}
    };

    public static int roundUp(int num, int divisor) {
        return (num + divisor - 1) / divisor;
    }


    @Override
    public void doLoop() throws Exception {
        cls();
        int[][] output = new int[roundUp(matrix.length, 2)][roundUp(matrix[0].length, 2)];
        for (int y=0; y<matrix.length; ++y)
            for (int x=0; x<matrix[y].length; ++x)
                if (matrix[y][x] != 0) plotMidres(output, x, y);
        renderMidres(output);
        readKey();
    }

    void plotMidres(int[][] output, int x, int y) {
        int[] pow = {1, 2, 4, 8};
        int macrox = x / 2;
        int macroy = y / 2;
        int microx = 1 - (x % 2);
        int microy = 1 - (y % 2);
        output[macroy][macrox] |= pow[microx + 2*microy];
    }

    void renderMidres(int[][] output) {
        int[] decode = {
                32, 172, 187, 162,
                188, 9161, 9191, 9190,
                190, 191, 161, 188,
                9162, 9187, 9172, 9032
        };

        boolean reverse = false;
        for (int y=0; y<output.length; ++y) {
            for (int x=0; x<output[y].length; ++x) {
                int chr = decode[output[y][x]];
                if (chr >= 9000) {
                    if (!reverse) write(18);
                    reverse = true;
                    write(chr-9000);
                } else {
                    if (reverse) write(146);
                    reverse = false;
                    write(chr);
                }
            }
            println();
            reverse = false;
        }

    }
}