32blit-sdl/emscripten-shell.html

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>32Blit Game</title>
    <style>
      .emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }

      div.emscripten { text-align: center; }
      /* the canvas *must not* have any border or padding, or mouse coords will be wrong */
      canvas.emscripten { border: 0px none; background-color: black; }

      .spinner {
        height: 50px;
        width: 50px;
        margin: 0px auto;
        animation: rotation 0.8s linear infinite;
        border-left: 10px solid #000;
        border-right: 10px solid #000;
        border-bottom: 10px solid #000;
        border-top: 10px solid #0f0;
        border-radius: 100%;
      }
      @keyframes rotation {
        from {transform: rotate(0deg);}
        to {transform: rotate(360deg);}
      }

    </style>
  </head>
  <body>
    <figure style="overflow:visible;" id="spinner"><div class="spinner"></div></figure>
    <div class="emscripten" id="status">Downloading...</div>
    <div class="emscripten">
      <progress value="0" max="100" id="progress" hidden=1></progress>
    </div>

    <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()" tabindex=-1></canvas>

    <script type='text/javascript'>
      var statusElement = document.getElementById('status');
      var progressElement = document.getElementById('progress');
      var spinnerElement = document.getElementById('spinner');

      function mountIDBFS() {
        // mount a persistent filesystem over the directory used for saves
        FS.mkdir("/libsdl");
        FS.mount(IDBFS, {}, '/libsdl');

        // sync before starting game
        Module['addRunDependency']("SYNC_DATA");
        FS.syncfs(true, function(err) {
          Module['removeRunDependency']("SYNC_DATA");
        });
      }

      var Module = {
        preRun: [mountIDBFS],
        postRun: [],
        print: (function() {
          return function(text) {
            if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
            console.log(text);
          };
        })(),
        printErr: function(text) {
          if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
          console.error(text);
        },
        canvas: (function() {
          var canvas = document.getElementById('canvas');

          // As a default initial behavior, pop up an alert when webgl context is lost. To make your
          // application robust, you may want to override this behavior before shipping!
          // See http://www.khronos.org/registry/webgl/specs/latest/1.0/#5.15.2
          canvas.addEventListener("webglcontextlost", function(e) { alert('WebGL context lost. You will need to reload the page.'); e.preventDefault(); }, false);

          return canvas;
        })(),
        setStatus: function(text) {
          if (!Module.setStatus.last) Module.setStatus.last = { time: Date.now(), text: '' };
          if (text === Module.setStatus.last.text) return;
          var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
          var now = Date.now();
          if (m && now - Module.setStatus.last.time < 30) return; // if this is a progress update, skip it if too soon
          Module.setStatus.last.time = now;
          Module.setStatus.last.text = text;
          if (m) {
            text = m[1];
            progressElement.value = parseInt(m[2])*100;
            progressElement.max = parseInt(m[4])*100;
            progressElement.hidden = false;
            spinnerElement.hidden = false;
          } else {
            progressElement.value = null;
            progressElement.max = null;
            progressElement.hidden = true;
            if (!text) spinnerElement.hidden = true;
          }
          statusElement.innerHTML = text;
        },
        totalDependencies: 0,
        monitorRunDependencies: function(left) {
          this.totalDependencies = Math.max(this.totalDependencies, left);
          Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
        }
      };
      Module.setStatus('Downloading...');
      window.onerror = function() {
        Module.setStatus('Exception thrown, see JavaScript console');
        spinnerElement.style.display = 'none';
        Module.setStatus = function(text) {
          if (text) Module.printErr('[post-exception status] ' + text);
        };
      };
    </script>
    {{{ SCRIPT }}}
  </body>
</html>