louisstow/Canvas-UI — Issue #2: border radius
Author: louisstow
Created: 2011-12-03 05:01:27+00:00
State: open

Have a rounded rectangle.

function roundRect(ctx, x, y, width, height, radius, fill, stroke) {
if (typeof stroke == "undefined" ) {
stroke = true;
}
if (typeof radius === "undefined") {
radius = 5;
}
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
if (stroke) {
ctx.stroke();
}
if (fill) {
ctx.fill();
}
}