allow oversampling x 2 if needed

settings_explorerjs.js

@@ -100,6 +100,7 @@ var semanticConverged=false;
 var showLabelsIfZoom=1.0;
 TW.edgeDefaultOpacity = 0.3  // opacity when true_color
 TW.edgeGreyColor = "rgba(200, 200, 200, 0.5)";
+TW.overSampling = false     // costly hi-def rendering (true => pixelRatio x 2)
 // ============ < / DEVELOPER OPTIONS > ============
 
 

tinawebJS/main.js

@@ -195,6 +195,15 @@ if(RES["OK"]) {
 
     // [ Initiating Sigma-Canvas ]
     var twjs_ = new TinaWebJS('#sigma-contnr');
+
+    // overriding pixelRatio is possible if we need very high definition
+    if (TW.overSampling) {
+      var realRatio = sigma.utils.getPixelRatio
+      sigma.utils.getPixelRatio = function() {
+        return 2 * realRatio()
+      }
+    }
+
     // NB new sigma.js: autoResize (no need for AdjustSigmaCanvas + sigmaLimits)
 
     console.log("categories: "+categories)
@@ -232,7 +241,6 @@ if(RES["OK"]) {
 
     console.log("customSettings", customSettings)
 
-
     // custom nodes rendering
     if (customSettings['twNodeRendBorder']) {
       // overriding the def is simplest