From 409b458d308e7bc0dc84568bf3124e0a78043781 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Tue, 5 Nov 2013 23:17:35 +0100
Subject: [PATCH] Add ol.replay.transformPath

---
 src/ol/replay/replay.js     | 38 +++++++++++++++++++++++++++++++++++++
 src/ol/replay/replaybase.js |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 src/ol/replay/replay.js

diff --git a/src/ol/replay/replay.js b/src/ol/replay/replay.js
new file mode 100644
index 0000000000..4edb41fa43
--- /dev/null
+++ b/src/ol/replay/replay.js
@@ -0,0 +1,38 @@
+goog.provide('ol.replay');
+
+goog.require('goog.vec.Mat4');
+
+
+/**
+ * @param {Array.<number>} path Path.
+ * @param {goog.vec.Mat4.AnyType} transform Transform.
+ * @param {Array.<number>=} opt_dest Destination.
+ * @return {Array.<number>} Pixel path.
+ */
+ol.replay.transformPath = function(path, transform, opt_dest) {
+  var m00 = goog.vec.Mat4.getElement(transform, 0, 0);
+  var m10 = goog.vec.Mat4.getElement(transform, 1, 0);
+  var m01 = goog.vec.Mat4.getElement(transform, 0, 1);
+  var m11 = goog.vec.Mat4.getElement(transform, 1, 1);
+  var m03 = goog.vec.Mat4.getElement(transform, 0, 3);
+  var m13 = goog.vec.Mat4.getElement(transform, 1, 3);
+  var n = path.length;
+  var result;
+  if (goog.isDef(opt_dest)) {
+    result = opt_dest;
+  } else {
+    result = new Array(n);
+  }
+  var j = 0;
+  var i, x, y;
+  for (i = 0; i < n; ) {
+    x = path[i++];
+    y = path[i++];
+    result[j++] = m00 * x + m01 * y + m03;
+    result[j++] = m10 * x + m11 * y + m13;
+  }
+  if (goog.isDef(opt_dest) && result.length != j) {
+    result.length = j;
+  }
+  return result;
+};
diff --git a/src/ol/replay/replaybase.js b/src/ol/replay/replaybase.js
index ab01a11a40..ac82137f66 100644
--- a/src/ol/replay/replaybase.js
+++ b/src/ol/replay/replaybase.js
@@ -5,6 +5,7 @@ goog.provide('ol.replay.StrokeStyle');
 
 goog.require('goog.vec.Mat4');
 goog.require('ol.Color');
+goog.require('ol.replay');
 
 
 /**