o3d-webgl: Avoid computation per element if ParamParamArray is bound.

BUG=none
TEST=o3d-webgl-samples/convolution.html still works
Review URL: http://codereview.chromium.org/2881037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@53688 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 3 deletions

diff --git a/o3d/samples/o3d-webgl/param.js b/o3d/samples/o3d-webgl/param.js
index 1aae87e..8e3dd8c 100644
--- a/o3d/samples/o3d-webgl/param.js
+++ b/o3d/samples/o3d-webgl/param.js
@@ -840,13 +840,14 @@ o3d.ParamMatrix4.prototype.applyToLocation = function(gl, location) {
  *    to which to apply the values.
  */
 o3d.ParamParamArray.prototype.applyToLocations = function(gl, locationArray) {
-  if (locationArray.length != this.value.length) {
+  var computedValue = this.value;
+  if (locationArray.length != computedValue.length) {
     gl.client.error_callback(
         'Invalid uniform param array: incorrect number of elements.');
   }
-  for (var i = 0; i < this.value.length; i++) {
+  for (var i = 0; i < computedValue.length; i++) {
     // Cannot have a ParamArray of ParamArrays, so safe to call applyToLocation
-    this.value.getParam(i).applyToLocation(gl, locationArray[i]);
+    computedValue.getParam(i).applyToLocation(gl, locationArray[i]);
   }
 };