X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=dygraph-layout.js;h=4beddc489fba1be624a744cfda69236d1c216a37;hb=5f453f17a4e6cd8a588018ce54d9cbab45e0ffac;hp=4f8656e8b5801f1bdda09622a9993e006caf4a23;hpb=80e653aa7a48cd48dbcaf24dff5d5b99417d91e7;p=dygraphs.git

diff --git a/dygraph-layout.js b/dygraph-layout.js
index 4f8656e..4beddc4 100644
--- a/dygraph-layout.js
+++ b/dygraph-layout.js
@@ -129,6 +129,11 @@ DygraphLayout.prototype._evaluateLimits = function() {
 DygraphLayout.prototype._evaluateLineCharts = function() {
   // add all the rects
   this.points = new Array();
+  // An array to keep track of how many points will be drawn for each set.
+  // This will allow for the canvas renderer to not have to check every point
+  // for every data set since the points are added in order of the sets in datasets
+  this.setPointsLengths = new Array();
+
   for (var setName in this.datasets) {
     if (!this.datasets.hasOwnProperty(setName)) continue;
 
@@ -141,9 +146,12 @@ DygraphLayout.prototype._evaluateLineCharts = function() {
     var prevYPx = NaN;
     var currXPx = NaN;
     var currYPx = NaN;
+    var setPointsLength = 0;
 
     // Ignore the pixel skipping optimization if there are error bars.
-    var skip_opt = (this.attr_("errorBars") ||
+    // XXX 2011-07-25 temporarily disabled (see autotests/tests/selection.js)
+    var skip_opt = (true ||
+                    this.attr_("errorBars") ||
                     this.attr_("customBars") ||
                     this.annotations.length > 0);
 
@@ -178,10 +186,12 @@ DygraphLayout.prototype._evaluateLineCharts = function() {
           name: setName
         };
         this.points.push(point);
+	setPointsLength += 1;
       }
       prevXPx = currXPx;
       prevYPx = currYPx;
     }
+    this.setPointsLengths.push(setPointsLength);
   }
 };