paintparty

// c is an object like {:cnvs <cnvs> :ctx <ctx>}
function canvasTrim(c, o={}) {

if(isEmpty(o)){o.top = o.left = o.right = o.bottom = true;}
  var w = c.cnvs.width,
      h = c.cnvs.height,
      ctx = c.ctx,
      padding = 2, // Padding around trim
      imageData = ctx.getImageData(0, 0, w, h), // Get Pixel Data
      alpha = [],