Add willReadFrequently to 2d canvas contexts to heatmap

plotly · Sep 30, 2023 · dab1412 · dab1412
1 parent 915a52b
commit dab1412
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/traces/heatmap/plot.js b/src/traces/heatmap/plot.js
@@ -162,7 +162,7 @@ module.exports = function(gd, plotinfo, cdheatmaps, heatmapLayer) {
         var canvas = document.createElement('canvas');
         canvas.width = canvasW;
         canvas.height = canvasH;
-        var context = canvas.getContext('2d');
+        var context = canvas.getContext('2d', {willReadFrequently: true});
 
         var sclFunc = makeColorScaleFuncFromTrace(trace, {noNumericCheck: true, returnArray: true});