You do accelerated drawing to the new offscreen framebuffer, and rotate blit the damaged regions.
Again, you should look at the intel driver for an example. Alan. On Fri, 2008-10-31 at 19:05 +0800, [EMAIL PROTECTED] wrote: > Dear Alan: > Do you mean we can use damage extension to draw the update screen, so > the draw speed can up a litter. > But the rotation action still use xrandr's software rotation method, is > it right? > > -----邮件原件----- > 发件人: Alan Hourihane [mailto:[EMAIL PROTECTED] > 发送时间: 2008年10月31日 18:47 > 收件人: Flora Gui > 抄送: [email protected] > 主题: Re: XRandR rotate support HW rotate or not? > > On Fri, 2008-10-31 at 17:50 +0800, [EMAIL PROTECTED] wrote: > > Dear Keith Packard： > > > > I have recently study RandR, I found if we use RandR rotate no > > matter static rotate or dynamic rotate，we always use RandR’s own > > software rotate. > > > > We draw the screen desktop very slow, how can we support HW > > rotate using RandR or it is a RandR limitation, if it is, RandR1.3 has > > support HW rotate or not ? > > > > Thanks a lot! > > It is possible to support HW accelerated rotation. > > You can use the damage extension to get rectangular regions to do > rotated blits. > > You can look at the Intel driver to see how this is done for an example. > > Alan. > > _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
