Hershey Roman Simple Vector Font test

font_hershey_v2.js

/* jshint esversion: 6 */
var g;

var VECTOR_FONT_POLY_SIZE = 22; // size in pixel ?
var VECTOR_FONT_POLY_SEPARATOR = 128;
var vectorFontOffset = 48;
var vectorFontCount = 10;
var vectorFontPolys = [
    // Character code 48 : 0
    6, 21,
    3, 20,
    1, 17,
    0, 12,
    0, 9,
    1, 4,
    3, 1,
    6, 0,
    8, 0,
    11, 1,
    13, 4,
    14, 9,
    14, 12,
    13, 17,
    11, 20,
    8, 21,
    6, 21 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 49 : 1
    0, 5,
    2, 3,
    5, 0,
    5, 21 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 50 : 2
    1, 5,
    1, 4,
    2, 2,
    3, 1,
    5, 0,
    9, 0,
    11, 1,
    12, 2,
    13, 4,
    13, 6,
    12, 8,
    10, 11,
    0, 21,
    13, 21 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 51 : 3
    2, 0,
    13, 0,
    7, 8,
    10, 8,
    12, 9,
    13, 10,
    14, 13,
    14, 15,
    13, 18,
    11, 20,
    8, 21,
    5, 21,
    2, 20,
    1, 19,
    0, 17 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 52 : 4
    10, 0,
    0, 14,
    15, 14 | VECTOR_FONT_POLY_SEPARATOR,
    10, 0,
    10, 21 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 53 : 5
    14, 0,
    3, 0,
    2, 9,
    3, 8,
    6, 7,
    9, 7,
    12, 8,
    14, 10,
    15, 13,
    15, 15,
    14, 18,
    12, 20,
    9, 21,
    6, 21,
    3, 20,
    2, 19,
    1, 17 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 54 : 6
    12, 3,
    11, 1,
    8, 0,
    6, 0,
    3, 1,
    1, 4,
    0, 9,
    0, 14,
    1, 18,
    3, 20,
    6, 21,
    7, 21,
    10, 20,
    12, 18,
    13, 15,
    13, 14,
    12, 11,
    10, 9,
    7, 8,
    6, 8,
    3, 9,
    1, 11,
    0, 14 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 55 : 7
    14, 0,
    4, 21 | VECTOR_FONT_POLY_SEPARATOR,
    0, 0,
    14, 0 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 56 : 8
    5, 0,
    2, 1,
    1, 3,
    1, 5,
    2, 7,
    4, 8,
    8, 9,
    11, 10,
    13, 12,
    14, 14,
    14, 17,
    13, 19,
    12, 20,
    9, 21,
    5, 21,
    2, 20,
    1, 19,
    0, 17,
    0, 14,
    1, 12,
    3, 10,
    6, 9,
    10, 8,
    12, 7,
    13, 5,
    13, 3,
    12, 1,
    9, 0,
    5, 0 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 57 : 9
    13, 7,
    12, 10,
    10, 12,
    7, 13,
    6, 13,
    3, 12,
    1, 10,
    0, 7,
    0, 6,
    1, 3,
    3, 1,
    6, 0,
    7, 0,
    10, 1,
    12, 3,
    13, 7,
    13, 12,
    12, 17,
    10, 20,
    7, 21,
    5, 21,
    2, 20,
    1, 18 | VECTOR_FONT_POLY_SEPARATOR,
    // Character code 58 : :
    5, 14,
    4, 13,
    5, 12,
    6, 13,
    5, 14 | VECTOR_FONT_POLY_SEPARATOR,
    5, 2,
    4, 1,
    5, 0,
    6, 1,
    5, 2 | VECTOR_FONT_POLY_SEPARATOR,

];

var vectorFonts = [
    [15, 17],   // 0
    [6, 4],     // 1
    [14, 14],   // 2
    [15, 15],   // 3
    [14, 5],    // 4
    [14, 17],   // 5
    [13, 23],   // 6
    [14, 4],    // 7
    [14, 29],   // 8
    [14, 23],   // 9
    [11, 10]    // :
];

var VECTOR_FONT_MAX_POLY_SIZE = 30;

var vector = {};

function graphicsFillVectorChar(x1, y1, size, ch) {

  if (size<0) return 0;

  if (ch<vectorFontOffset || ch-vectorFontOffset>=vectorFontCount) return 0;

  var vertOffset = 0;
  var i;
  var fontOffset = ch-vectorFontOffset;
  for (i=0;i<fontOffset;i++)
    vertOffset += vectorFonts[i][1]*2;

  vector.verCount = vectorFonts[i][1];
  vector.width = vectorFonts[i][0];
  //console.log("offset:",vertOffset,"width:",vector.width, "verCount:",vector.verCount);

  var verts = new Array(VECTOR_FONT_MAX_POLY_SIZE*2);

  var idx=0;
  for (i=0;i<vector.verCount*2;i+=2) {
    // translate + scale
    verts[idx+0] = (x1 + (((vectorFontPolys[vertOffset+i+0])&0x7F)*size 
                            + (VECTOR_FONT_POLY_SIZE/2)) / VECTOR_FONT_POLY_SIZE) | 0;
    verts[idx+1] = (y1 + (((vectorFontPolys[vertOffset+i+1])&0x7F)*size 
                            + (VECTOR_FONT_POLY_SIZE/2)) / VECTOR_FONT_POLY_SIZE) | 0;

    //console.log(vertOffset+i,verts[idx+0]|0,verts[idx+1]|0);
    idx += 2;
    if ( vectorFontPolys[vertOffset+i+1] & VECTOR_FONT_POLY_SEPARATOR ) {

      // graphicsFillPoly(gfx,idx/2, verts);
      //console.log(idx, verts.slice(0,idx));
      g.drawPoly(verts.slice(0,idx));
      dump();
      idx=0;
    }
  }
  return (vector.width * size) / ( VECTOR_FONT_POLY_SIZE * 2 );
}


function clear() {
   if (process.env.BOARD === "LINUX") {
     g.setColor(1).fillRect(0, 0, g.getWidth(), g.getHeight());
     g.setColor(0);
   }
   else
     g.clear().setColor(0, 1, 0);
}

function dump() {
  if (process.env.BOARD === "LINUX") g.dump();
}

if (process.env.BOARD === "LINUX") {
    g = Graphics.createArrayBuffer(239, 239, 1);
    clear();
} else {
    g.clear().setColor(0, 1, 0);
}


graphicsFillVectorChar(20,20,200,"0".charCodeAt(0));