more antialiased text fun

I just redid the antialiased text/xrender patch against the latest on the 21.2 branch; everything mostly works. It's available at http://www.intrepid.com/~vladimir/xemacs_beta_aa.patch.gz . The fonts are specified now in normal XLFD fashion, and the code will attempt to find a truetype font that can be rendered antialiased first, and if it fails, will fall back to core fonts. However, I'm having some expose/redraw issues. When an expose event is received, most of the time the relevant portions of the frame don't get redrawn. Is there some sort of pixmap caching going on, so that x_output_string doesn't always get called? Strangely enough, if I slowly drag a window over the xemacs window, the letters do mostly get redrawn as they appear, but if I speed up the dragging, then nothing gets redrawn. Note that this only happens if the window is obscured by another window, and then uncovered -- everything updates correctly from events inside the window (text editing, moving, selecting, etc.). Hitting C-l always causes the window to render correctly. There's also an issue with the tabs -- I put in patch to xlwtabs.c to avoid crashing if the font that was passed in was NULL (which shouldn't happen, but crashes shouldn't happen either :-) and then code in glyphs-x.c, which when setting the font for the tabs will check if an Xft font is in use, and if it is, it will attempt to get an equivalent core font from the library and use that. This works (the tabs get displayed fine), but XEmacs then every once in a while spews XConfigWindow errors and locks up (easily repeatable). I haven't had a chance to track this one down, but hiding the tabs gets rid of this problem. Any help into either issue would be appreciated... also if anyone wants to give this code a shot but needs help setting things up, feel free to email me.. -- Vladimir -- vladimir(a)helixcode.com