regionhelpers.py 文件源码

def _cairo_surface_extents(surface):
    if surface == None:
        return False
    cr = cairo.Context(surface)
    x1, y1, x2, y2 = cr.clip_extents()
    x1 = floor(x1)
    y1 = floor(y1)
    x2 = ceil(x2)
    y2 = ceil(y2)
    x2 -= x1
    y2 -= y1

    extents = cairo.RectangleInt()
    extents.x = x1
    extents.y = y1
    extents.width = x2
    extents.height = y2

    return extents