cairo:recording-surface-ink-extents (surface)

surface -- a cairo:surface-t instance

x -- a double float for the x coordinate of the top-left of the ink bounding box
y -- a double float for the y coordinate of the top-left of the ink bounding box
width -- a double float for the width of the the ink bounding box
height -- a double float for the height of the the ink bounding box

Measures the extents of the operations stored within the recording surface. This is useful to compute the required size of an image surface, or equivalent, into which to replay the full sequence of drawing operations.