@Override
public Rect tbsGetVisibleRect() {
Rect visible = new Rect(-mX, -mY, 2560, 1600);
visible.intersect(new Rect(0, 0, mWidth, mHeight));
float scale = mWidth / (float) mContentsRect.getWidth();
visible.setLeft((int) (visible.getLeft() / scale));
visible.setTop((int) (visible.getTop() / scale));
visible.setWidth((int) (visible.getWidth() / scale));
visible.setHeight((int) (visible.getHeight() / scale));
return visible;
}