present: disable page flip only when a slave crtc is active
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.Yu@amd.com> Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
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@ -117,6 +117,18 @@ present_flip_pending_pixmap(ScreenPtr screen)
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return screen_priv->flip_pending->pixmap;
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}
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static Bool
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present_check_output_slaves_active(ScreenPtr pScreen)
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{
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ScreenPtr pSlave;
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xorg_list_for_each_entry(pSlave, &pScreen->slave_list, slave_head) {
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if (RRHasScanoutPixmap(pSlave))
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return TRUE;
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}
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return FALSE;
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}
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static Bool
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present_check_flip(RRCrtcPtr crtc,
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WindowPtr window,
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@ -145,7 +157,7 @@ present_check_flip(RRCrtcPtr crtc,
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return FALSE;
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/* Fail to flip if we have slave outputs */
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if (screen->output_slaves)
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if (screen->output_slaves && present_check_output_slaves_active(screen))
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return FALSE;
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/* Make sure the window hasn't been redirected with Composite */
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