i use html5 canvas for drawing like a paint my problem if i paint with thin brush size this is nice and smooth but if i increase brush size i get line with spaces.
code: http://jsfiddle.net/L2g43q1g/
Thin brush size result:
http://postimg.org/image/eyxenntth/
Big brush size result:
http://postimg.org/image/60agxczf9/
I think you need to reverse the order of you context.closePath() and context.stroke() and also add context.lineJoin = "round"
Updated stroke function:
function stroke(mouseX, mouseY) {
context.beginPath();
context.lineJoin = "round";
context.lineWidth = 10; //1 = thin line without spaces, 10 = big line with spaces..
context.moveTo(prevMouseX, prevMouseY);
context.lineTo(mouseX, mouseY);
context.closePath();
context.stroke();
prevMouseX = mouseX;
prevMouseY = mouseY;
}