On Tue, 2010-02-02 at 23:33 -0800, Corbin Simpson wrote: > In theory, sure, but I don't think I've ever seen anybody actually > have any problems with this. In my experience the glyph cache is > actually too big sometimes; when doing 3D drivers, if I accidentally > clobber my cache, I need to go open up a character map and scroll > through a dozen fonts to clear it.
That's the EXA glyph cache pixmap, whereas Russell was presumably referring to the generic RENDER mechanism of the X server caching glyph data uploaded by the clients (which is currently done by storing each cached glyph in a pixmap of its own). I agree with others though that his concern seems rather hypothetical. > On Tue, Feb 2, 2010 at 6:18 AM, Russell Shaw <[email protected]> wrote: > > Hi, > > Is remote execution of X clients away from the X server still regarded > > as a design goal, or does everyone just develop for client applications > > that only run on or close to the X server machine? > > > > With a unicode text widget, every time a character is entered, the > > line or paragraph(s) need to be moved and/or reshaped. This can mean > > sending a few largish bitmaps for every key press. Other toolkits > > may add new polygon tesselated glyphs to the XRender cache: > > > > http://www.keithp.com/~keithp/talks/usenix2001/ > > http://cgit.freedesktop.org/xorg/proto/renderproto/plain/renderproto.txt > > > > With a cursive font, all the cursive glyphs on a line could compress > > when the line is close to full, but before the need for a linebreak. > > That would stress out the cache advantage of XRender. Another problem > > with XRender is that it's computationally expensive for small systems > > without polygon hardware. > > _______________________________________________ > > xorg mailing list > > [email protected] > > http://lists.freedesktop.org/mailman/listinfo/xorg > > > > > -- Earthling Michel Dänzer | http://www.vmware.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
