sketch.js

// Monoline vector fonts from the Tektronix 7000-series oscilloscope
// character generator EPROM readout board. Extracted from Holger's PDFs
// `Font_160-2997-00.pdf` and `Font_160-2997-01.pdf`, which reproduce
// Tektronix readout fonts 160-2997-00 (1984) and 160-2997-01 (1986).
//
// Background: https://w140.com/tekwiki/wiki/7000_series_readout_system.
// The source PDF streams store page-rotated line segments; the coordinates
// below are normalized to displayed glyph coordinates with positive Y down.

function setup() {
  createCanvas(1024, 720);
  pixelDensity(2);

  buildGlyphMap(tektronix7000Font1984);
  buildGlyphMap(tektronix7000Font1986);
}

function keyPressed() {
  if (key === 's' || key === 'S') {
    saveCanvas('tektronix_7000_fonts', 'png');
  }
}


function draw() {
  background('black');
  strokeWeight(1.0);
  strokeJoin(ROUND);
  strokeCap(ROUND);

  drawFontBlock(tektronix7000Font1984, 100, 125);
  drawFontBlock(tektronix7000Font1986, 100, 425);

  stroke("white"); 
  drawString(tektronix7000Font1984, "HELLO WORLD", 455,79,  21, 0.9);
  drawString(tektronix7000Font1986, "HELLO WORLD", 455,379, 21, 0.9);
}


function drawFontBlock(font, x, y) {
  noStroke();
  fill(128);
  textFont('Arial');
  textSize(15);
  text(font.title, x, y - 28);

  stroke('white');
  noFill();

  const TEKTRONIX_7000_SUPPORTED_CHARS = [
    'ABCDEFGHIJKLM',
    'NOPQRSTUVWXYZ',
    '0123456789+-/',
    'cdpmnμΩΔ<>↓'
  ];

  const size = 42;
  const spacing = 1.0
  const lineHeight = 1.3;
  let ty = y;
  for (const row of TEKTRONIX_7000_SUPPORTED_CHARS) {
    drawString(font, row, x, ty, size, spacing);
    ty += size * lineHeight;
  }
}


function buildGlyphMap(font) {
  font.map = new Map();
  for (const glyph of font.glyphs) {
    if (!font.map.has(glyph.char)) {
      font.map.set(glyph.char, glyph);
    }
  }
  font.map.set(' ', { char: ' ', strokes: [] });
}


function getGlyph(font, ch) {
  return font.map.get(ch);
}


function drawString(font, str, x, y, size, spacing = 1.15, lineHeight = 1.3) {
  const sca = size / TEKTRONIX_7000_H;
  const advancePx = TEKTRONIX_7000_ADVANCE * sca * spacing;
  let cx = x;
  let cy = y;

  for (const ch of str) {
    if (ch === '\n') {
      cx = x;
      cy += size * lineHeight;
      continue;
    }
    drawGlyph(font, ch, cx, cy, size);
    cx += advancePx;
  }
}


function drawGlyph(font, ch, gx, gy, size) {
  const glyph = getGlyph(font, ch);
  if (!glyph) return;

  const sca = size / TEKTRONIX_7000_H;
  for (const stroke of glyph.strokes) {
    if (!stroke.length) continue;

    if (stroke.length === 2 && samePoint(stroke[0], stroke[1])) {
      point(gx + stroke[0][0] * sca, gy + stroke[0][1] * sca);
      continue;
    }

    beginShape();
    for (const [px, py] of stroke) {
      vertex(gx + px * sca, gy + py * sca);
    }
    endShape();
  }
}


function samePoint(a, b) {
  return a[0] === b[0] && a[1] === b[1];
}


const TEKTRONIX_7000_W = 170;
const TEKTRONIX_7000_H = 210;
const TEKTRONIX_7000_ADVANCE = 200;

const tektronix7000Font1984 = {
  title: 'Tektronix 7000 Readout Font 160-2997-00 (1984)',
  partNumber: '160-2997-00',
  year: 1984,
  glyphs: [
    {"char":"A","strokes":[[[0,180],[60,0]],[[60,0],[120,180]],[[120,180],[60,0]],[[60,0],[0,180]],[[0,180],[60,0]],[[60,0],[120,180]],[[90,120],[30,120]]]},
    {"char":"B","strokes":[[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,60]],[[120,60],[90,90]],[[90,90],[0,90]],[[0,90],[90,90]],[[90,90],[120,120]],[[120,120],[120,150]],[[120,150],[90,180]],[[90,180],[0,180]],[[0,180],[90,180]]]},
    {"char":"C","strokes":[[[120,30],[90,0]],[[90,0],[30,0]],[[30,0],[0,30]],[[0,30],[0,150]],[[0,150],[0,30]],[[0,150],[30,180]],[[30,180],[90,180]],[[90,180],[120,150]]]},
    {"char":"D","strokes":[[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[90,180]],[[90,180],[120,150]],[[120,150],[120,30]],[[120,30],[90,0]],[[90,0],[0,0]],[[0,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,150]],[[90,180],[0,180]]]},
    {"char":"E","strokes":[[[0,180],[120,180]],[[120,180],[0,180]],[[0,180],[0,0]],[[0,0],[120,0]],[[120,0],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,90],[90,90]],[[90,90],[0,90]]]},
    {"char":"F","strokes":[[[0,180],[0,90]],[[0,90],[0,0]],[[0,0],[120,0]],[[120,0],[0,0]],[[0,0],[0,90]],[[0,90],[90,90]],[[90,90],[0,90]],[[0,90],[0,180]]]},
    {"char":"G","strokes":[[[120,30],[90,0]],[[90,0],[30,0]],[[30,0],[0,30]],[[0,30],[0,150]],[[0,150],[30,180]],[[30,180],[120,180]],[[120,180],[120,120]],[[120,120],[90,120]],[[120,180],[30,180]],[[0,150],[0,30]]]},
    {"char":"H","strokes":[[[0,180],[0,90]],[[0,90],[120,90]],[[120,90],[120,180]],[[120,180],[120,0]],[[120,0],[120,90]],[[120,90],[0,90]],[[0,90],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[120,0],[120,180]]]},
    {"char":"I","strokes":[[[30,180],[60,180]],[[60,180],[60,0]],[[60,0],[30,0]],[[90,0],[60,0]],[[60,0],[60,180]],[[90,180],[60,180]],[[60,180],[60,0]],[[60,0],[60,180]]]},
    {"char":"J","strokes":[[[120,0],[120,150]],[[120,150],[120,0]],[[120,0],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]]]},
    {"char":"K","strokes":[[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[120,180],[0,90]],[[0,90],[120,0]],[[120,0],[0,90]],[[0,90],[120,180]]]},
    {"char":"L","strokes":[[[0,0],[0,180]],[[0,180],[120,180]],[[120,180],[0,180]],[[0,180],[0,0]],[[0,0],[0,180]]]},
    {"char":"M","strokes":[[[0,180],[0,0]],[[0,0],[60,60]],[[60,60],[120,0]],[[120,0],[120,180]],[[120,180],[120,0]],[[120,0],[120,180]],[[120,0],[60,60]],[[60,60],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]]]},
    {"char":"N","strokes":[[[0,180],[0,0]],[[0,0],[120,180]],[[120,180],[120,0]],[[120,0],[120,180]],[[120,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[120,180]],[[120,180],[120,0]]]},
    {"char":"O","strokes":[[[0,30],[0,150]],[[0,150],[0,30]],[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]],[[120,150],[120,30]]]},
    {"char":"P","strokes":[[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[90,0]],[[90,0],[0,0]],[[90,0],[120,30]],[[120,30],[120,60]],[[120,60],[90,90]],[[90,90],[0,90]],[[0,90],[90,90]]]},
    {"char":"Q","strokes":[[[120,180],[60,150]],[[60,150],[120,180]],[[60,180],[30,180]],[[30,180],[0,150]],[[0,150],[0,30]],[[0,30],[0,150]],[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,120]],[[120,120],[60,180]]]},
    {"char":"R","strokes":[[[0,0],[0,180]],[[0,180],[0,90]],[[0,90],[60,90]],[[60,90],[120,180]],[[120,180],[60,90]],[[60,90],[90,90]],[[90,90],[120,60]],[[120,60],[120,30]],[[120,30],[90,0]],[[90,0],[0,0]],[[0,0],[0,90]],[[0,0],[90,0]]]},
    {"char":"S","strokes":[[[120,30],[90,0]],[[90,0],[30,0]],[[30,0],[0,30]],[[0,30],[0,60]],[[0,60],[30,90]],[[30,90],[90,90]],[[90,90],[120,120]],[[120,120],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]]]},
    {"char":"T","strokes":[[[60,180],[60,0]],[[60,0],[0,0]],[[120,0],[60,0]],[[60,0],[60,180]],[[60,180],[60,0]]]},
    {"char":"U","strokes":[[[0,0],[0,150]],[[0,150],[0,0]],[[0,0],[0,150]],[[0,150],[30,180]],[[30,180],[90,180]],[[90,180],[120,150]],[[120,150],[120,0]],[[120,0],[120,150]],[[120,150],[120,0]]]},
    {"char":"V","strokes":[[[0,0],[60,180]],[[60,180],[120,0]],[[120,0],[60,180]],[[60,180],[0,0]],[[0,0],[60,180]],[[60,180],[120,0]]]},
    {"char":"W","strokes":[[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[60,120]],[[60,120],[120,180]],[[120,180],[120,0]],[[120,0],[120,180]],[[120,180],[120,0]],[[120,180],[60,120]],[[60,120],[0,180]]]},
    {"char":"X","strokes":[[[0,180],[120,0]],[[120,0],[0,180]],[[0,180],[120,0]],[[120,0],[0,180]],[[120,180],[0,0]],[[0,0],[120,180]],[[120,180],[0,0]],[[0,0],[120,180]]]},
    {"char":"Y","strokes":[[[60,180],[60,90]],[[60,90],[0,0]],[[0,0],[60,90]],[[60,90],[120,0]],[[120,0],[60,90]],[[60,90],[60,180]]]},
    {"char":"Z","strokes":[[[120,180],[0,180]],[[0,180],[120,0]],[[120,0],[0,0]],[[0,0],[120,0]],[[120,0],[0,180]],[[0,180],[120,180]],[[0,180],[120,0]]]},
    {"char":"0","strokes":[[[0,30],[0,150]],[[0,150],[0,30]],[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]],[[120,150],[120,30]]]},
    {"char":"1","strokes":[[[60,180],[60,0]],[[60,0],[30,30]],[[60,0],[60,180]],[[60,180],[30,180]],[[60,180],[90,180]],[[60,180],[60,0]]]},
    {"char":"2","strokes":[[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,60]],[[120,60],[0,150]],[[0,150],[120,60]],[[120,60],[0,150]],[[0,150],[0,180]],[[0,180],[120,180]],[[120,180],[0,180]]]},
    {"char":"3","strokes":[[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,60]],[[120,60],[90,90]],[[90,90],[60,90]],[[90,90],[120,120]],[[120,120],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]]]},
    {"char":"4","strokes":[[[90,180],[90,0]],[[90,0],[0,120]],[[0,120],[120,120]],[[120,120],[0,120]],[[0,120],[90,0]],[[90,0],[90,180]],[[90,180],[90,0]],[[90,0],[0,120]],[[0,120],[120,120]]]},
    {"char":"5","strokes":[[[0,0],[120,0]],[[120,0],[0,0]],[[0,0],[0,60]],[[0,60],[90,60]],[[90,60],[120,90]],[[120,90],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]]]},
    {"char":"6","strokes":[[[120,30],[90,0]],[[90,0],[30,0]],[[30,0],[0,30]],[[0,30],[0,150]],[[0,150],[30,180]],[[30,180],[90,180]],[[90,180],[120,150]],[[120,150],[120,120]],[[120,120],[90,90]],[[90,90],[0,90]],[[0,90],[90,90]],[[0,150],[0,30]]]},
    {"char":"7","strokes":[[[60,180],[120,0]],[[120,0],[0,0]],[[0,0],[120,0]],[[120,0],[60,180]],[[60,180],[120,0]]]},
    {"char":"8","strokes":[[[30,90],[0,30]],[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[90,90]],[[90,90],[30,90]],[[30,90],[0,150]],[[0,150],[30,180]],[[30,180],[90,180]],[[90,180],[120,150]],[[120,150],[90,90]]]},
    {"char":"9","strokes":[[[30,90],[120,90]],[[120,90],[30,90]],[[30,90],[0,60]],[[0,60],[0,30]],[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]],[[120,150],[120,30]]]},
    {"char":"+","strokes":[[[60,30],[60,150]],[[60,150],[60,30]],[[0,90],[120,90]],[[120,90],[0,90]]]},
    {"char":"-","strokes":[[[0,90],[120,90]],[[120,90],[0,90]]]},
    {"char":"/","strokes":[[[0,180],[120,0]],[[120,0],[0,180]],[[0,180],[120,0]],[[120,0],[0,180]]]},
    {"char":"c","strokes":[[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]],[[0,150],[0,90]],[[0,90],[30,60]],[[30,60],[90,60]],[[90,60],[120,90]]]},
    {"char":"d","strokes":[[[120,180],[120,0]],[[120,0],[120,180]],[[120,180],[30,180]],[[30,180],[0,150]],[[0,150],[0,120]],[[0,120],[30,90]],[[30,90],[120,90]],[[120,90],[30,90]],[[120,180],[120,0]]]},
    {"char":"p","strokes":[[[30,150],[90,150]],[[90,150],[120,120]],[[120,120],[120,90]],[[120,90],[90,60]],[[90,60],[30,60]],[[30,60],[30,210]],[[30,210],[30,60]]]},
    {"char":"m","strokes":[[[0,180],[0,60]],[[0,60],[30,60]],[[30,60],[60,90]],[[60,90],[60,180]],[[60,180],[60,90]],[[60,90],[90,60]],[[90,60],[120,90]],[[120,90],[120,180]],[[120,180],[120,90]],[[0,60],[0,180]]]},
    {"char":"n","strokes":[[[30,180],[30,60]],[[30,60],[30,180]],[[30,90],[90,60]],[[90,60],[120,90]],[[120,90],[120,180]],[[120,180],[120,90]]]},
    {"char":"μ","strokes":[[[30,60],[30,180]],[[30,180],[0,210]],[[30,180],[30,150]],[[30,150],[90,150]],[[90,150],[120,120]],[[120,120],[120,60]],[[30,150],[30,60]]]},
    {"char":"Ω","strokes":[[[0,180],[30,180]],[[30,180],[30,150]],[[30,150],[0,120]],[[0,120],[0,60]],[[0,60],[30,30]],[[30,30],[90,30]],[[90,30],[120,60]],[[120,60],[120,120]],[[120,120],[90,150]],[[90,150],[90,180]],[[90,180],[120,180]]]},
    {"char":"Δ","strokes":[[[0,180],[60,0]],[[60,0],[120,180]],[[120,180],[0,180]],[[0,180],[60,0]],[[60,0],[120,180]],[[120,180],[0,180]],[[0,180],[120,180]],[[120,180],[60,0]],[[60,0],[0,180]]]},
    {"char":"<","strokes":[[[90,180],[0,90]],[[0,90],[90,0]],[[90,0],[0,90]],[[0,90],[90,180]],[[90,180],[0,90]],[[0,90],[90,0]]]},
    {"char":">","strokes":[[[30,0],[120,90]],[[120,90],[30,180]],[[30,180],[120,90]],[[120,90],[30,0]],[[30,0],[120,90]],[[120,90],[30,180]]]},
    {"char":"↓","strokes":[[[30,150],[60,180]],[[60,180],[60,0]],[[60,0],[60,180]],[[60,180],[60,0]],[[90,150],[60,180]]]},
    {"char":".","strokes":[[[0,210],[0,210]],[[0,210],[0,210]],[[0,210],[0,210]]]},
  ]
};

const tektronix7000Font1986 = {
  title: 'Tektronix 7000 Readout Font 160-2997-01 (1986)',
  partNumber: '160-2997-01',
  year: 1986,
  glyphs: [
    {"char":"A","strokes":[[[60,0],[0,90]],[[0,90],[0,180]],[[0,180],[0,90]],[[0,90],[120,90]],[[120,90],[120,180]],[[120,180],[120,90]],[[120,90],[60,0]],[[60,0],[0,90]],[[0,90],[120,90]],[[120,90],[60,0]]]},
    {"char":"B","strokes":[[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,60]],[[120,60],[90,90]],[[0,90],[90,90]],[[90,90],[120,120]],[[120,120],[120,150]],[[120,150],[90,180]],[[90,180],[0,180]],[[0,180],[0,0]],[[0,0],[0,180]]]},
    {"char":"C","strokes":[[[120,30],[90,0]],[[90,0],[30,0]],[[30,0],[0,30]],[[0,30],[0,150]],[[0,30],[0,150]],[[0,150],[30,180]],[[30,180],[90,180]],[[90,180],[120,150]]]},
    {"char":"D","strokes":[[[0,0],[0,180]],[[0,180],[60,180]],[[60,180],[120,150]],[[120,150],[120,30]],[[120,150],[120,30]],[[120,30],[60,0]],[[60,0],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]]]},
    {"char":"E","strokes":[[[0,0],[0,180]],[[0,180],[120,180]],[[120,180],[0,180]],[[0,180],[0,90]],[[0,90],[90,90]],[[90,90],[0,90]],[[0,90],[0,0]],[[0,0],[120,0]],[[120,0],[0,0]],[[0,0],[0,180]]]},
    {"char":"F","strokes":[[[0,180],[0,90]],[[0,90],[90,90]],[[90,90],[0,90]],[[0,90],[0,0]],[[0,0],[120,0]],[[120,0],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]]]},
    {"char":"G","strokes":[[[120,30],[90,0]],[[90,0],[30,0]],[[30,0],[0,30]],[[0,30],[0,150]],[[0,30],[0,150]],[[0,150],[30,180]],[[30,180],[120,180]],[[120,180],[120,120]],[[120,120],[60,120]]]},
    {"char":"H","strokes":[[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[0,90]],[[0,90],[120,90]],[[120,90],[120,0]],[[120,0],[120,180]],[[120,180],[120,0]],[[120,0],[120,180]],[[120,180],[120,90]],[[120,90],[0,90]],[[0,90],[0,180]]]},
    {"char":"I","strokes":[[[60,0],[60,180]],[[60,180],[0,180]],[[0,180],[120,180]],[[120,180],[60,180]],[[60,180],[60,0]],[[60,0],[0,0]],[[0,0],[120,0]],[[120,0],[60,0]],[[60,0],[60,180]],[[60,180],[60,0]]]},
    {"char":"J","strokes":[[[120,0],[120,150]],[[120,150],[120,0]],[[120,0],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]]]},
    {"char":"K","strokes":[[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[0,180]],[[0,90],[120,0]],[[120,0],[0,90]],[[0,90],[120,180]],[[120,180],[0,90]]]},
    {"char":"L","strokes":[[[0,0],[0,180]],[[0,180],[120,180]],[[120,180],[0,180]],[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]]]},
    {"char":"M","strokes":[[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[60,90]],[[60,90],[120,0]],[[120,0],[120,180]],[[120,180],[120,0]],[[120,0],[120,180]],[[120,180],[120,0]],[[120,0],[60,90]],[[60,90],[0,0]]]},
    {"char":"N","strokes":[[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[120,180]],[[120,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[120,0],[120,180]],[[120,180],[0,0]],[[0,0],[120,180]],[[120,180],[120,0]],[[120,0],[120,180]],[[120,180],[120,0]]]},
    {"char":"O","strokes":[[[90,180],[30,180]],[[30,180],[0,150]],[[0,150],[0,30]],[[0,150],[0,30]],[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,150]],[[120,30],[120,150]],[[120,150],[90,180]]]},
    {"char":"P","strokes":[[[90,0],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,60]],[[120,60],[90,90]],[[90,90],[0,90]],[[0,90],[90,90]]]},
    {"char":"Q","strokes":[[[60,120],[90,150]],[[90,150],[60,180]],[[60,180],[30,180]],[[30,180],[0,150]],[[0,150],[0,30]],[[0,150],[0,30]],[[0,30],[30,0]],[[30,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,120]],[[120,120],[90,150]],[[90,150],[120,180]]]},
    {"char":"R","strokes":[[[90,0],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[0,180]],[[0,180],[0,0]],[[0,0],[90,0]],[[90,0],[120,30]],[[120,30],[120,60]],[[120,60],[90,90]],[[90,90],[0,90]],[[0,90],[60,90]],[[60,90],[120,180]],[[120,180],[60,90]]]},
    {"char":"S","strokes":[[[120,30],[90,0]],[[90,0],[30,0]],[[30,0],[0,30]],[[0,30],[0,60]],[[0,60],[30,90]],[[30,90],[90,90]],[[90,90],[120,120]],[[120,120],[120,150]],[[120,150],[90,180]],[[90,180],[30,180]],[[30,180],[0,150]]]},
    {"char":"T","strokes":[[[60,0],[60,180]],[[60,180],[60,0]],[[60,0],[0,0]],[[0,0],[120,0]],[[120,0],[60,0]],[[60,0],[60,180]],[[60,180],[60,0]]]},
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