From 0414e337b3bfc2b1f2d5e4c941550847644c3a31 Mon Sep 17 00:00:00 2001
From: Tim Schaub <tim.schaub@gmail.com>
Date: Fri, 18 Jan 2013 17:57:32 -0700
Subject: [PATCH] Render lines

---
 src/ol/renderer/canvas/canvasrenderer.js | 38 ++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/src/ol/renderer/canvas/canvasrenderer.js b/src/ol/renderer/canvas/canvasrenderer.js
index a22dcfa427..a2ae75f951 100644
--- a/src/ol/renderer/canvas/canvasrenderer.js
+++ b/src/ol/renderer/canvas/canvasrenderer.js
@@ -7,8 +7,9 @@ goog.require('ol.Coordinate');
 goog.require('ol.Pixel');
 goog.require('ol.canvas');
 goog.require('ol.geom.Geometry');
+goog.require('ol.geom.LineString');
 goog.require('ol.geom.Point');
-goog.require('ol.renderer.Layer');
+goog.require('ol.style.LiteralLine');
 goog.require('ol.style.LiteralPoint');
 goog.require('ol.style.LiteralShape');
 goog.require('ol.style.ShapeType');
@@ -53,6 +54,40 @@ ol.renderer.canvas.Renderer = function(canvas, transform, opt_offset) {
 };
 
 
+/**
+ * @param {Array.<ol.geom.LineString>} lines Line array.
+ * @param {ol.style.LiteralLine} symbolizer Line symbolizer.
+ */
+ol.renderer.canvas.Renderer.prototype.renderLineStrings =
+    function(lines, symbolizer) {
+
+  var context = this.context_,
+      i, ii, line, coords, dim, j, jj, x, y;
+
+  context.globalAlpha = symbolizer.opacity;
+  context.strokeStyle = symbolizer.strokeStyle;
+  context.lineWidth = symbolizer.strokeWidth;
+  context.beginPath();
+
+  for (i = 0, ii = lines.length; i < ii; ++i) {
+    line = lines[i];
+    dim = line.dimension;
+    coords = line.coordinates;
+    for (j = 0, jj = coords.length; j < jj; j += dim) {
+      x = coords[j];
+      y = coords[j + 1];
+      if (j === 0) {
+        context.moveTo(x, y);
+      } else {
+        context.lineTo(x, y);
+      }
+    }
+  }
+
+  context.stroke();
+};
+
+
 /**
  * @param {Array.<ol.geom.Point>} points Point array.
  * @param {ol.style.LiteralPoint} symbolizer Point symbolizer.
@@ -78,7 +113,6 @@ ol.renderer.canvas.Renderer.prototype.renderPoints =
     context.drawImage(canvas, coords[0], coords[1]);
   }
   context.restore();
-
 };