This prevents the tearing of moving window in a composite WM desktop when output slave is attached but none of its crtc is really active.
Signed-off-by: Qiang Yu <qiang...@amd.com> --- present/present.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/present/present.c b/present/present.c index a7ca06e..5f32679 100644 --- a/present/present.c +++ b/present/present.c @@ -118,6 +118,18 @@ present_flip_pending_pixmap(ScreenPtr screen) } static Bool +present_check_output_slaves_active(ScreenPtr pScreen) +{ + ScreenPtr pSlave; + + xorg_list_for_each_entry(pSlave, &pScreen->slave_list, slave_head) { + if (RRHasScanoutPixmap(pSlave)) + return TRUE; + } + return FALSE; +} + +static Bool present_check_flip(RRCrtcPtr crtc, WindowPtr window, PixmapPtr pixmap, @@ -145,7 +157,7 @@ present_check_flip(RRCrtcPtr crtc, return FALSE; /* Fail to flip if we have slave outputs */ - if (screen->output_slaves) + if (screen->output_slaves && present_check_output_slaves_active(screen)) return FALSE; /* Make sure the window hasn't been redirected with Composite */ -- 2.7.4 _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel