Font ascents bug

[Mattias Grönlund <Mattias Gronlund sdf se>]

Hi,

I'm afraid that I have found a bug in the usage of GtkFont->ascent. The
problem is that the height of a font is ascent + descent + 1 and not
just ascent + descent, as it is used in app places of Gtk that I have
checked. 
If I understands it right, the ascent is pixels high over the main-line
of the font and descent is pixels deep below the main-line. So that
give the extra + 1 for the main-line.

You kan see the bug in action by typing an 'Å' (uppercase aring) and a
'g' in testgtk:s entry-box. You will see that the g is displayed as it
should, but the 'Å' has lost one pixel at the top.

To fix the problem the requsition->height has to be increased and the
calculation of the main-line (the y-croodinate to gdk_draw_text) has
to be increased by one.

At the end of the mail you will find a patch for gtkentry.c to fix the
problem, but it is just to show what I mean.

/Mattias

begin 644 gtkentry.patch
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`
end