Re: italic fonts: glyphs overwrite each other

[YAMAMOTO Mitsuharu]

>>>>> On Tue, 19 Jul 2005 12:50:06 +0100, David Reitter <address@hidden> said:

> When using an italic font (tested with lucida grande fontset,
> variable-width), glyphs overwrite parts of previous glyphs. It looks
> like single glyphs are shown on the screen with a white background
> color, on top of the previous text. Upon redisplay, everything looks
> good, which means that this only occurs after typing text as opposed
> to pasting, or making it italic after typing.

Such a chip in overhangs may occur when there is no overhangs in the
reported metric.  I guess there's no right overhang in the `h' glyph
if mac-allow-anti-aliasing is set to nil.  So the problem is the
renderer puts some dots outside the reported bounding box when Quartz
2D anti-aliasing for QuickDraw Text is enabled.

                                     YAMAMOTO Mitsuharu
                                address@hidden