var old_canvas_width = Math.floor(this.imageEl.OriginWidth * old_scale_level);
var old_canvas_height = Math.floor(this.imageEl.OriginHeight * old_scale_level);
- var new_pw = old_pw - (this.canvasEl.width - old_canvas_width) / 2;
- var new_ph = old_ph - (this.canvasEl.height - old_canvas_height) / 2;
+ var new_pw = Math.floor(old_pw - (this.canvasEl.width - old_canvas_width) / 2);
+ var new_ph = Math.floor(old_ph - (this.canvasEl.height - old_canvas_height) / 2);
// console.log("old canvas width: " + old_canvas_width);
// console.log("old canvas height: " + old_canvas_height);