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font-inspector.html
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<!DOCTYPE html>
<html>
<head>
<title>opentype.js font inspector</title>
<meta name="description" content="A JavaScript library to manipulate the letterforms of text from the browser or node.js.">
<meta charset="utf-8">
<link rel="stylesheet" href="site.css">
<script type="text/javascript" src="dist/opentype.js"></script>
</head>
<body>
<div class="header">
<div class="container">
<h1>opentype.js</h1>
<nav>
<a href="index.html">Home</a>
<a href="font-inspector.html">Font Inspector</a>
<a href="glyph-inspector.html">Glyph Inspector</a>
</nav>
<a class="github" href="https://github.com/nodebox/opentype.js">Fork me on GitHub</a>
</div>
</div>
<div class="container">
<div class="explain">
<h1>Font Inspector</h1>
<small>opentype.js is an OpenType and TrueType font parser. Here you can inspect the raw font metadata.</small>
</div>
<input id="file" type="file">
<span class="info" id="font-name">Roboto-Black</span>
<canvas id="preview" width="940" height="50" class="text"></canvas>
<div id="message"></div>
<hr>
<div id="font-data">
<h3 class="collapsed">Font Header table <a href="https://www.microsoft.com/typography/OTSPEC/head.htm" target="_blank">head</a></h3>
<dl id="head-table"></dl>
<h3 class="collapsed">Horizontal Header table <a href="https://www.microsoft.com/typography/OTSPEC/hhea.htm" target="_blank">hhea</a></h3>
<dl id="hhea-table"></dl>
<h3 class="collapsed">Maximum Profile table <a href="https://www.microsoft.com/typography/OTSPEC/maxp.htm" target="_blank">maxp</a></h3>
<dl id="maxp-table"></dl>
<h3 class="collapsed">Naming table <a href="https://www.microsoft.com/typography/OTSPEC/name.htm" target="_blank">name</a></h3>
<dl id="name-table"></dl>
<h3 class="collapsed">OS/2 and Windows Metrics table <a href="https://www.microsoft.com/typography/OTSPEC/os2.htm" target="_blank">OS/2</a></h3>
<dl id="os2-table"></dl>
<h3 class="collapsed">PostScript table <a href="https://www.microsoft.com/typography/OTSPEC/post.htm" target="_blank">post</a></h3>
<dl id="post-table"></dl>
<h3 class="collapsed">Character To Glyph Index Mapping Table <a href="https://www.microsoft.com/typography/OTSPEC/cmap.htm" target="_blank">cmap</a></h3>
<dl id="cmap-table"></dl>
<h3 class="collapsed">Font Variations table <a href="https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6fvar.html" target="_blank">fvar</a></h3>
<dl id="fvar-table"></dl>
</div>
<hr>
<div class="explain">
<h1>Free Software</h1>
<p>opentype.js is available on <a href="https://github.com/nodebox/opentype.js">GitHub</a> under the <a href="https://raw.github.com/nodebox/opentype.js/master/LICENSE">MIT License</a>.</p>
<p>Copyright © 2015 Frederik De Bleser.</p>
</div>
<hr>
</div>
<script type="text/javascript">
var font = null;
var fontSize = 32;
var textToRender = 'Grumpy wizards make toxic brew for the evil Queen and Jack.';
var previewPath = null;
function escapeHtml(unsafe) {
return unsafe
.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/\u0022/g, '"')
.replace(/\u0027/g, ''');
}
function enableHighDPICanvas(canvas) {
if (typeof canvas === 'string') {
canvas = document.getElementById(canvas);
}
var pixelRatio = window.devicePixelRatio || 1;
if (pixelRatio === 1) return;
var oldWidth = canvas.width;
var oldHeight = canvas.height;
canvas.width = oldWidth * pixelRatio;
canvas.height = oldHeight * pixelRatio;
canvas.style.width = oldWidth + 'px';
canvas.style.height = oldHeight + 'px';
canvas.getContext('2d').scale(pixelRatio, pixelRatio);
}
function renderText() {
if (!font) return;
var previewCanvas = document.getElementById('preview');
var previewCtx = previewCanvas.getContext("2d");
previewCtx.clearRect(0, 0, previewCanvas.width, previewCanvas.height);
font.draw(previewCtx, textToRender, 0, 32, fontSize, {kerning: true});
}
function showErrorMessage(message) {
var el = document.getElementById('message');
if (!message || message.trim().length === 0) {
el.style.display = 'none';
} else {
el.style.display = 'block';
}
el.innerHTML = message;
}
function sortKeys(dict) {
var keys = [];
for (var key in dict) {
keys.push(key);
}
keys.sort();
return keys;
}
function displayNames(names) {
var html = '';
properties = sortKeys(names);
for (var i = 0; i < properties.length; i++) {
var property = properties[i];
html += '<dt>'+escapeHtml(property)+'</dt><dd>';
var translations = names[property];
var langs = sortKeys(translations);
for (var j = 0; j < langs.length; j++) {
var lang = langs[j];
var esclang = escapeHtml(lang);
html += '<span class="langtag">' + esclang
+ '</span> <span class="langname" lang=' + esclang + '>'
+ escapeHtml(translations[lang]) + '</span> ';
}
html += '</dd>';
}
document.getElementById('name-table').innerHTML = html;
}
function displayFontData() {
var html, tablename, table, property, value;
for (tablename in font.tables) {
table = font.tables[tablename];
if (tablename == 'name') {
displayNames(table);
continue;
}
html = '';
for (property in table) {
value = table[property];
html += '<dt>'+property+'</dt><dd>';
if (Array.isArray(value) && typeof value[0] === 'object') {
html += value.map(function(item) {
return JSON.stringify(item);
}).join('<br>');
} else {
html += value;
}
html += '</dd>';
}
var element = document.getElementById(tablename+"-table");
if (element) {
element.innerHTML = html;
}
}
}
function onFontLoaded(font) {
window.font = font;
renderText();
displayFontData();
}
function onReadFile(e) {
document.getElementById('font-name').innerHTML = '';
var file = e.target.files[0];
var reader = new FileReader();
reader.onload = function(e) {
try {
font = opentype.parse(e.target.result);
onFontLoaded(font);
showErrorMessage('');
} catch (err) {
showErrorMessage(err.toString());
if (err.stack) console.log(err.stack);
throw(err);
}
}
reader.onerror = function(err) {
showErrorMessage(err.toString());
}
reader.readAsArrayBuffer(file);
}
var fontFileName = 'fonts/Roboto-Black.ttf';
document.getElementById('font-name').innerHTML = fontFileName.split('/')[1];
var fileButton = document.getElementById('file');
fileButton.addEventListener('change', onReadFile, false);
var tableHeaders = document.getElementById('font-data').getElementsByTagName('h3');
for(var i = tableHeaders.length; i--; ) {
tableHeaders[i].addEventListener('click', function(e) {
e.target.className = (e.target.className === 'collapsed') ? 'expanded' : 'collapsed';
}, false);
}
enableHighDPICanvas('preview');
opentype.load(fontFileName, function(err, font) {
var amount, glyph, ctx, x, y, fontSize;
if (err) {
showErrorMessage(err.toString());
return;
}
onFontLoaded(font);
});
</script>
</body>
</html>