Adds ttx test harness

test/font/fontutils.js

@@ -0,0 +1,67 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+var base64alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+
+function decodeFontData(base64) {
+  var result = [];
+
+  var bits = 0, bitsLength = 0;
+  for (var i = 0, ii = base64.length; i < ii; i++) {
+    var ch = base64[i];
+    if (ch <= " ") continue;
+    var index = base64alphabet.indexOf(ch);
+    if (index < 0) throw "Invalid character";
+    if (index >= 64) break;
+    bits = (bits << 6) | index;
+    bitsLength += 6;
+    if (bitsLength >= 8) {
+      bitsLength -= 8
+      var code = (bits >> bitsLength) & 0xFF;
+      result.push(code);
+    }
+  }
+  return new Uint8Array(result);
+}
+
+function encodeFontData(data) {
+  var buffer = '';
+  var i, n;
+  for (i = 0, n = data.length; i < n; i += 3) {
+    var b1 = data[i] & 0xFF;
+    var b2 = data[i + 1] & 0xFF;
+    var b3 = data[i + 2] & 0xFF;
+    var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
+    var d3 = i + 1 < n ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
+    var d4 = i + 2 < n ? (b3 & 0x3F) : 64;
+    buffer += (base64alphabet.charAt(d1) + base64alphabet.charAt(d2) +
+                base64alphabet.charAt(d3) + base64alphabet.charAt(d4));
+  }
+  return buffer;
+}
+
+function ttx(data, callback) {
+  var xhr = new XMLHttpRequest();
+  xhr.open('POST', '/ttx');
+
+  var encodedData = encodeFontData(data);
+  xhr.setRequestHeader("Content-type", "text/plain");
+  xhr.setRequestHeader("Content-length", encodedData.length);
+
+  xhr.onreadystatechange = function getPdfOnreadystatechange(e) {
+    if (xhr.readyState === 4) {
+      if (xhr.status === 200) {
+        callback(xhr.responseText);
+      } else {
+        callback('<error>Transport error: ' + xhr.statusText + '</error>');
+      }
+    }
+  };
+  xhr.send(encodedData);
+}
+
+function verifyTtxOutput(output) {
+  var m = /^<error>(.*?)<\/error>/.exec(output);
+  if (m)
+    throw m[1];
+}