[OpenJDK 2D-Dev] 2 small xrender fixes

[Clemens Eisserer]

Hi Phil,

> I see the problem now. I looked at what T2K (the rasteriser) reports, but
> in the non-T2K glue code we then make an adjustment in the case of LCD
> glyphs
> which simply should never have been applied in the case of an empty image.
> It has never affected any of our code as I think we only truly use the width
> (not the
> same as advance) during blitting and the check for a null image stops us
> before that's
> an issue.

Great you were able to reproduce it.
With XRender the width is stored when uploading the glyph server-side,
and somehow X didn't check for an empty glyph.

> I'll file a bug and fix this.

Thanks :)

I'll do some further validation on the locking stuff, I am still not
really sure were these jules crashes come from :-/

- Clemens