Mesa (mesa_7_5_branch): stw: ignore swapbuffer requests on singlebuffer

[Keith Whitwell]

Module: Mesa
Branch: mesa_7_5_branch
Commit: 9192347443bc3db9ebeb4b5cc090133b63396b04
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=9192347443bc3db9ebeb4b5cc090133b63396b04

Author: Keith Whitwell <keithw at vmware.com>
Date:   Tue Jun  9 16:35:55 2009 +0100

stw: ignore swapbuffer requests on singlebuffer

Return TRUE in this case.  Returning FALSE seems to result in
mis-rendering -- possibly opengl32.dll is trying to compensate by
doing a software blit??

---

 .../state_trackers/wgl/shared/stw_framebuffer.c    |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/gallium/state_trackers/wgl/shared/stw_framebuffer.c b/src/gallium/state_trackers/wgl/shared/stw_framebuffer.c
index f27f4cd..a601fc5 100644
--- a/src/gallium/state_trackers/wgl/shared/stw_framebuffer.c
+++ b/src/gallium/state_trackers/wgl/shared/stw_framebuffer.c
@@ -380,6 +380,9 @@ stw_swap_buffers(
    if (fb == NULL)
       return FALSE;
 
+   if (!(fb->pfi->pfd.dwFlags & PFD_DOUBLEBUFFER))
+      return TRUE;
+
    pipe_mutex_lock( fb->mutex );
 
    /* If we're swapping the buffer associated with the current context