func (i *Image) hasDependency() bool {
	if i.stale {
		return false
	}
	return len(i.drawTrianglesHistory) > 0
}
func (i *Image) hasDependency() bool {
	if i.stale {
		return false
	}
	return len(i.drawTrianglesHistory) > 0
}
// hasDependency returns a boolean value indicating whether the image depends on another image.