extents
Description:
Compute the logical and ink extents of a glyph string.
See the documentation for [method@Pango.Font.get_glyph_extents] for details about the interpretation of the rectangles.
Examples of logical (red) and ink (green) rects:
 
Parameters:
| this | a `PangoGlyphString` | 
| font | a `PangoFont` | 
| ink_rect | rectangle used to store the extents of the glyph string as drawn | 
| logical_rect | rectangle used to store the logical extents of the glyph string |