On Mon, Apr 13, 2015 at 03:53:22PM +0530, Jindal, Sonika wrote: > >>I never really got the to understand the need of reversing 90 and 270 :) > >>The last discussion was not concluded, AFAIR. > >>Things look correct to me and work fine with the testcase also. > >>Is there something completely different which I am unable to get? > > > >BSpec gives me the impression the hw rotation is cw, whereas the drm one > >is ccw. > > > Yes, HW rotation is cw as per bspec. In drm, where do we consider it as > anti-cw? I assume it is cw because all the macros work as expected, ie cw. The DRM is quite a direct implementation of the X semantics: http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt "In Randr, the coordinate system is rotated in a counter-clockwise direction relative to the normal orientation" This matches the usual orientation of the trigonometric circle. -- Damien _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
