From: Stéphane Marchesin <marcheu@chromium.org>
Date: Sat, 11 May 2013 01:30:46 +0000 (-0700)
Subject: st/xlib: Flush the front buffer before doing CopySubBuffer
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4f905d4900ea962876eb5933dd00d4b251767f71;p=mesa.git

st/xlib: Flush the front buffer before doing CopySubBuffer

We flush pending rendering before running CopySubBuffer, which
ensures that the right bits get to the screen.

NOTE: This is a candidate for stable release branches.

Reviewed-by: Brian Paul <brianp@vmware.com>
---

diff --git a/src/gallium/state_trackers/glx/xlib/xm_api.c b/src/gallium/state_trackers/glx/xlib/xm_api.c
index c39968dc7cf..b758c8eaae7 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_api.c
+++ b/src/gallium/state_trackers/glx/xlib/xm_api.c
@@ -1253,6 +1253,10 @@ void XMesaSwapBuffers( XMesaBuffer b )
  */
 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
 {
+   XMesaContext xmctx = XMesaGetCurrentContext();
+
+   xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL);
+
    xmesa_copy_st_framebuffer(b->stfb,
          ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT,
          x, b->height - y - height, width, height);