//Exits the current viewport, unless there is no viewport.
func (me *Canvas) PopViewport() {
if me.viewport.pt != 0 {
me.origin.SubtractFrom(me.viewport.translate())
me.viewport.pop()
r := me.viewport.bounds()
if r.Width == -1 {
r.Width = p.DisplayWidth()
}
if r.Height == -1 {
r.Height = p.DisplayHeight()
}
p.SetClipRect(r.X, r.Y, r.Width, r.Height)
me.origin = me.translation.AddOf(me.viewport.bounds().Point)
me.origin.AddTo(me.viewport.translate())
}
}
//Returns the width of the display window.
func DisplayWidth() int {
return p.DisplayWidth()
}