The `PangoGlyphGeometry` structure contains width and positioning information for a single glyph.

Note that @width is not guaranteed to be the same as the glyph extents. Kerning and other positioning applied during shaping will affect both the @width and the @x_offset for the glyphs in the glyph string that results from shaping.

The information in this struct is intended for rendering the glyphs, as follows:

1. Assume the current point is (x, y) 2. Render the current glyph at (x + x_offset, y + y_offset), 3. Advance the current point to (x + width, y) 4. Render the next glyph