throttle proxied frames

1 files changed, 17 insertions, 0 deletions

diff --git a/src/proxyWorker.js b/src/proxyWorker.js
index dd572dad..70b55244 100644
--- a/src/proxyWorker.js
+++ b/src/proxyWorker.js
@@ -125,6 +125,19 @@ Browser.resizeListeners.push(function(width, height) {
   postMessage({ target: 'canvas', op: 'resize', width: width, height: height });
 });
 
+// Frame throttling
+
+var frameId = 0;
+var clientFrameId = 0;
+
+var postMainLoop = Module['postMainLoop'];
+Module['postMainLoop'] = function() {
+  if (postMainLoop) postMainLoop();
+  // frame complete, send a frame id
+  postMessage({ target: 'tick', id: frameId++ });
+  commandBuffer = [];
+};
+
 // buffer messages until the program starts to run
 
 var messageBuffer = null;
@@ -171,6 +184,10 @@ onmessage = function onmessage(message) {
       webGLWorker.onmessage(message.data);
       break;
     }
+    case 'tock': {
+      clientFrameId = message.data.id;
+      break;
+    }
     default: throw 'wha? ' + message.data.target;
   }
 };