pango-font-glyph-extents (font glyph ink-rect logical-rect)

font -- a pango-font object
glyph -- the glyph index of type pango-glyph
ink-rect -- a pango-rectangle instance used to store the extents of the glyph as drawn or NULL to indicate that the result is not needed
logical-rect -- a pango-rectangle instance used to store the logical extents of the glyph or NULL to indicate that the result is not needed

Gets the logical and ink extents of a glyph within a font. The coordinate system for each rectangle has its origin at the base line and horizontal origin of the character with increasing coordinates extending to the right and down. The macros PANGO_ASCENT(), PANGO_DESCENT(), PANGO_LBEARING(), and PANGO_RBEARING() can be used to convert from the extents rectangle to more traditional font metrics. The units of the rectangles are in 1/+pango-scale+ of a device unit.

If font is nil, this function gracefully sets some sane values in the output variables and returns.