I think that happens because of how cairo maps coordinates. You have to shift some coordinates by 0.5px depending on the line width. The first question here explains it better than i can: http://cairographics.org/FAQ ( btw, i guess i'm a 'pixels are little squares' person :) )
I already had a patch for that somewhere, I'll bring it up to date and post it. Mike Cook wrote:
Since I first tried nVidia's AIGLX with Compiz I've been seeing some pretty consistent drawing problems on GWD's minimize and maximize buttons on hover. It looks like part of the fill is drawn with low alpha. I haven't been able to duplicate it when using Xgl... Here's a quick vid of what I'm seeing: http://s154.photobucket.com/albums/s273/m1kecook/Compiz/?action=view¤t=gwd-button-prob.flv The following patch seems to work around the problem (but only if I set the alpha less than 1.0): --- gtk/window-decorator/gtk-window-decorator.c +++ gtk/window-decorator/gtk-window-decorator.c @@ -943,7 +943,7 @@ button_state_paint (cairo_t *cr, cairo_stroke_preserve (cr); if (state & IN_EVENT_WINDOW) - cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); + cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.99); else cairo_set_source_rgba (cr, color->r, color->g, color->b, 0.95); I'm not proficient enough with Cairo to know if this is a bug there, with nVidia's driver, or something in GWD or somewhere else. Anyone have insights? ...MC _______________________________________________ compiz mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/compiz
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