bug: see dots when apply opacity to pencil

[lhvan]

problem:
https://ibb.co/ibWfEK
When i set the globalAlpha to set opacity in pencil, we will see dots in drawn line. How can i remove them.

[viliusle]

You can remove ctx.beginPath(); inside loop in /src/js/tools/pencil.js, function render_antialiased(), it is responsible for that issue. (But please dont)

But i don't recommend doing it, because performance different is HUGE. It will slow down system, and user will not be able to draw circles, but end up in something like rectangles, because of poor performance. Basically pencil tool creates lots of vectors.

Other fix could be change this tool to draw to empty image directly, like erase is doing.

[lhvan]

@viliusle I got it, thank you!