r1, r2 = pango.ExtentsToPixels(inclusive, nearest)
#PANGO_SCALE factor and performing rounding. The inclusive
and nearest arguments must be tables that have the fields x, y, width,
and height initialized. If you don't need one of the rectangles, you can
also set it to Nil.
The inclusive rectangle is converted by flooring the x/y coordinates
and extending width/height, such that the final rectangle completely
includes the original rectangle.
The nearest rectangle is converted by rounding the coordinates
of the rectangle to the nearest device unit (pixel).
The rule to which argument to use is: if you want the resulting device-space
rectangle to completely contain the original rectangle, pass it in as
inclusive. If you want two touching-but-not-overlapping rectangles stay
touching-but-not-overlapping after rounding to device units, pass them in
as nearest.
NilNil