Move Uint32Array.fill polyfill to utils

src/js/model/Frame.js

@@ -58,13 +58,7 @@
     } else {
       pixels = _emptyPixelGridCache[key] = new Uint32Array(width * height);
       var transparentColorInt = pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR);
-      if (!pixels.fill) { // PhantomJS ='(
-        for (var i = 0; i < width * height; i++) {
-          pixels[i] = transparentColorInt;
-        }
-      } else {
-        pixels.fill(transparentColorInt);
-      }
+      pixels.fill(transparentColorInt);
     }
 
     return new Uint32Array(pixels);

src/js/utils/core.js

@@ -38,6 +38,28 @@ if (!Function.prototype.bind) {
   };
 }
 
+/**
+ * Polyfill for typedarrays' fill method for PhantomJS
+ */
+if (!Uint32Array.prototype.fill) {
+  Uint32Array.prototype.fill = function (value, start, end) {
+    start = typeof start === 'undefined' ? 0 : start;
+    end = typeof end === 'undefined' ? this.length : end;
+
+    if (start < 0) {
+      start = this.length + start;
+    }
+
+    if (end < 0) {
+      end = this.length + end;
+    }
+
+    for (var i = start; i < end; i++) {
+      this[i] = value;
+    }
+  };
+}
+
 /**
  * @provide pskl.utils
  *