Add quakespasm, and OpenGL+SDL-based port of quake1.

ports/quakespasm/quakespasm.js

+/*
+ * Copyright (c) 2014 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+var PAK_FILE = 'id1/pak0.pak';
+
+function updateStatus(message) {
+  document.getElementById('status').innerHTML += message + '<br />';
+}
+
+/*
+ * Creates and add to the DOM the NaCl embed tag which
+ * in effect launches Quake.
+ */
+function runQuake(pwd) {
+  var embed = document.createElement('embed');
+  embed.width = 800;
+  embed.height = 600;
+  embed.type = 'application/x-nacl';
+  embed.src = 'quakespasm.nmf';
+  if (pwd)
+    embed.setAttribute('PWD', pwd);
+  document.getElementById('quake').appendChild(embed);
+}
+
+function extractNextEntry(entries, i, filesystem, oncomplete) {
+  if (i === entries.length) {
+    oncomplete();
+    return;
+  }
+
+  var entry = entries[i];
+  if (entry.directory) {
+    filesystem.root.getDirectory(entry.filename, { create : true },
+      function() {
+        extractNextEntry(entries, i + 1, filesystem, oncomplete);
+      }
+    );
+    return;
+  }
+
+  filesystem.root.getFile(entry.filename, { create : true },
+    function(fileEntry) {
+      var writer = new zip.FileWriter(fileEntry);
+      entry.getData(writer,
+        function() {
+          extractNextEntry(entries, i + 1, filesystem, oncomplete);
+        });
+    },
+    function(error) {
+      updateStatus('error creating temp file: ' + error);
+    }
+  );
+}
+
+function extractZipFile(file, filesystem, oncomplete) {
+  updateStatus('Extracting file: ' + file.name);
+  zip.createReader(new zip.BlobReader(file),
+    function(zipReader) {
+      zipReader.getEntries(function(entries) {
+        extractNextEntry(entries, 0, filesystem, oncomplete);
+      });
+    },
+    function() {
+      updateStatus('Error reading zip file');
+    }
+  )
+}
+
+function uploadDidChange(event) {
+  function oncomplete() {
+    // Once we have extracted all the files then
+    // launch the game.
+    updateStatus("Extracted all file. Launching Quake.");
+    runQuake('/tmp');
+  }
+
+  window.webkitRequestFileSystem(window.TEMPORARY, 50 * 1024 * 1024,
+    function(fs) {
+      var file = event.target.files[0];
+      extractZipFile(file, fs, oncomplete);
+    },
+    function() {
+      updateStatus('Error accessing html5 filesystem.');
+    }
+  );
+}
+
+function loadFromLocalStorage() {
+  function loadFailure() {
+    updateStatus('Quake data not found in local html5 filesystem.');
+    updateStatus('Please locate a quake level set (for example the '
+      + '<a href="http://www.libsdl.org/projects/quake/data/quakesw-1.0.6.zip">'
+      + 'shareware levels</a>) and either extract them alongside the nmf file,'
+      + ' or use the upload button below to unzip them in the local html5'
+      + ' filesystem.');
+    // Create an html5 file input elemnt in so the user can upload the game
+    // data as a zip file.
+    document.getElementById('quake').innerHTML =
+      '<input type="file" accept="application/zip" id="infile">';
+    document.getElementById('infile').addEventListener('change',
+                                                       uploadDidChange,
+                                                       false);
+  }
+
+  function loadSuccess() {
+    updateStatus('Found pak file in local storage. Launching quake.');
+    runQuake('/tmp');
+  }
+
+  window.webkitRequestFileSystem(window.TEMPORARY, 3 * 1024 * 1024,
+    function(fs) {
+      fs.root.getFile(PAK_FILE, {}, loadSuccess, loadFailure);
+    }
+  );
+}
+
+function onLoad() {
+  updateStatus('Searching for Quake data (' + PAK_FILE + ')');
+  var req = new XMLHttpRequest();
+  req.onload = function() {
+    if (this.status === 200) {
+      updateStatus('Found ' + PAK_FILE + '. Launching quake.');
+      runQuake();
+    } else {
+      // Failed to find PAK_FILE on webserver, try local storage
+      updateStatus('Quake data not found alongside executable.');
+      loadFromLocalStorage();
+    }
+  };
+  req.open('GET', PAK_FILE);
+  req.send(null);
+}
+
+window.onload = function() {
+  onLoad();
+};