On Thu, 2008-11-06 at 10:20 +0100, Xavier Bestel wrote: > On Sat, 2008-11-01 at 12:25 +0100, Michel Dänzer wrote: > > On Fri, 2008-10-31 at 19:17 +0100, Xavier Bestel wrote: > > > Le vendredi 31 octobre 2008 à 09:34 -0400, Alex Deucher a écrit : > > > > 2008/10/31 <[EMAIL PROTECTED]>: > > > > > 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 ? > > > > > > > > Your driver needs to implement the EXA composite hook with support for > > > > transforms and the randr 1.2 shadow_create/allocate/destroy hooks. > > > > The basic idea is that when you elect to rotate your screen, a shadow > > > > framebuffer is allocated in the randr core code calling the driver > > > > shadow* hooks to allocate a buffer for the rotated screen. The crtc > > > > is then pointed to this shadow buffer. The randr core code then uses > > > > the driver's EXA composite hook to transform the regions that are > > > > damaged and display them in the shadow buffer. Both the Intel driver > > > > and the radeon driver implement this. > > > > > > BTW, does anyone know why rotating the screen doesn't play well with > > > compiz on an r300 ? The screen looks garbled (like if the framebuffer > > > wasn't rotated so the pitch is all wrong), every second image (e.g. when > > > you move the cube slowly, one image is perfect, the next one is > > > garbled). > > > > Does disabling tiling and/or page flipping help? > > Ok, after using it for a while, I think I can say it doesn't help that > much: with page flipping disabled, the driver hangs regularly the > machine. It's a solid lock, the machine doesn't pong.
Is that only when using rotation, or even otherwise? -- Earthling Michel Dänzer | http://tungstengraphics.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ xorg mailing list xorg@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/xorg