ignore touch events that do not correspond to a tracked touch; fixes BananaBread crashes

kripken · kripken · commit 3aca411f788b · 2014-05-08T16:57:42.000-07:00
diff --git a/src/library_sdl.js b/src/library_sdl.js
@@ -789,6 +789,7 @@ var LibrarySDL = {
         }
         case 'touchstart': case 'touchend': case 'touchmove': {
           var touch = event.touch;
+          if (!Browser.touches[touch.identifier]) break;
           var w = Module['canvas'].width;
           var h = Module['canvas'].height;
           var x = Browser.touches[touch.identifier].x / w;

Original file line number	Diff line number	Diff line change
`@@ -789,6 +789,7 @@ var LibrarySDL = {`
`789`	`789`	`}`
`790`	`790`	`case 'touchstart': case 'touchend': case 'touchmove': {`
`791`	`791`	`var touch = event.touch;`
	`792`	`+ if (!Browser.touches[touch.identifier]) break;`
`792`	`793`	`var w = Module['canvas'].width;`
`793`	`794`	`var h = Module['canvas'].height;`
`794`	`795`	`var x = Browser.touches[touch.identifier].x / w;`