package readers.fonts;

import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.awt.Color;
import java.util.List;

public class Glyph {
    final static int TRANSPARENT = new Color(0,0,0,0).getRGB();
    int width=0;
    int height=0;
    boolean[] data = new boolean[]{};

    public static List<Glyph> split(BufferedImage img) {
        int startX=-1;
        int endX=-1;
        List<Glyph> glyphs = new ArrayList<>();
        outer:
        for (int x=0;x<img.getWidth();x++) {
            for (int y=0;y<img.getHeight();y++) {
                if (img.getRGB(x, y)!=TRANSPARENT) {
                    if (startX==-1) {
                        startX=x;
                    }
                    continue outer;
                }
            }
            //If we got to here it means we found transparent on everything.
            if (startX!=-1) {
                endX=x;
                //Create a Glyph out of this.
                Glyph g = new Glyph();
                g.width=endX-startX;
                g.height=img.getHeight();
                int[] arr = img.getRGB(startX,0,g.width,g.height,null,0,g.width);
                //Find the min and max Y.
                int startY=g.height;
                int endY=0;
                for (int X=0;X<g.width;X++) {
                    for (int Y=0;Y<g.height;Y++) {
                        if (arr[Y*g.width+X]!=TRANSPARENT&&Y<startY) {
                            startY=Y;
                        }
                        if (arr[Y*g.width+X]!=TRANSPARENT&&Y>endY) {
                            endY=Y;
                        }
                    }
                }
                g.height=endY-startY;
                g.data = new boolean[g.width*g.height];
                for (int X=0;X<g.width;X++) {
                    for (int Y=0;Y<g.height;Y++) {
                        g.data[Y*g.width+X]=arr[(Y+startY)*g.width+X]!=TRANSPARENT;
                    }
                }
                glyphs.add(g);
                startX=-1;
                endX=-1;
            }
        }
        return glyphs;
    }
}