By passing divisor=0, we imply we do not care about synchronisation of this request to the vertical refresh - the spec says that if we miss the target frame, the swap will be presented as quickly as possible and may forgo waiting until the next vblank. By using divisor=1, we request that the swap be presented upon the vertical refresh immediately following recipe, enforcing the synchronisation to vblank and avoiding tearing.
Reported-and-tested-by: Lukas Hejtmanek <[email protected]> Signed-off-by: Chris Wilson <[email protected]> --- va/x11/dri2_util.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/va/x11/dri2_util.c b/va/x11/dri2_util.c index d076fb3..9ff5e95 100644 --- a/va/x11/dri2_util.c +++ b/va/x11/dri2_util.c @@ -95,8 +95,9 @@ dri2SwapBuffer(VADriverContextP ctx, struct dri_drawable *dri_drawable) if (dri2_drawable->has_backbuffer) { if (gsDRI2SwapAvailable) { CARD64 ret; - VA_DRI2SwapBuffers(ctx->native_dpy, dri_drawable->x_drawable, 0, 0, - 0, &ret); + VA_DRI2SwapBuffers(ctx->native_dpy, dri_drawable->x_drawable, + 0, 1, 0, + &ret); } else { xrect.x = 0; xrect.y = 0; -- 2.6.4 _______________________________________________ Libva mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/libva
