On Tue, 24 Feb 2009 11:33:13 +0000 (GMT), Michael Drake wrote: > > > > I get sluggish scrolling on some sites, > > > > Which sites? Scrolling speed is fast here and doesn't vary between > > > sites. > > > Mostly ones with complicated amounts of imagery - eg. > > http://www.bbc.co.uk is really slow. > > Did this get fixed?
Not really :( > I dunno if it's relevant, but I recently updated the info for the tiled > bitmap plotters: > > http://source.netsurf-browser.org/trunk/netsurf/desktop/plotters.h?r1=6361&r2=6594 > > So it now explains what x and y are and that the extents of the repeat (if > repeating) will be given by the currently set clip rectangle. > > It looks like the Amiga plotters use scrn-Width and scrn->Height for the > tiled plotting extents. I don't know what they are but the clip rectangle > will be the size of the visible bit of canvas as a worst case and > generally smaller. scrn->Width and scrn->Height are the screen's dimensions, which is also the size of the off-screen bitmap. It's not massively different to the visible area if the window is fully extended. I think the speed problem is mainly due to alpha blits being very slow, but I can't speed them up. Chris
