Reducing min font size to 2; rearranging fontSizeScale logic

src/canvas.js

@@ -18,7 +18,7 @@ var TextRenderingMode = {
 };
 
 // Minimal font size that would be used during canvas fillText operations.
-var MIN_FONT_SIZE = 8;
+var MIN_FONT_SIZE = 2;
 
 var CanvasExtraState = (function CanvasExtraStateClosure() {
   function CanvasExtraState(old) {
@@ -721,15 +721,17 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
         if (scale == 0 || lineWidth == 0)
           lineWidth = this.getSinglePixelWidth();
         else
-          lineWidth /= scale * fontSizeScale;
-
-        ctx.lineWidth = lineWidth;
+          lineWidth /= scale;
 
         if (textSelection)
           text.geom = this.getTextGeometry();
 
-        if (fontSizeScale != 1.0)
+        if (fontSizeScale != 1.0) {
           ctx.scale(fontSizeScale, fontSizeScale);
+          lineWidth /= fontSizeScale;
+        }
+
+        ctx.lineWidth = lineWidth;
 
         var x = 0;
         for (var i = 0; i < glyphsLength; ++i) {