Mesa (7.10): st/egl: Fix eglCopyBuffers.

[Chia-I Wu]

Module: Mesa
Branch: 7.10
Commit: 55fb7269f09317bea58c9b0f710738ebff61d31a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=55fb7269f09317bea58c9b0f710738ebff61d31a

Author: Chia-I Wu <olv at lunarg.com>
Date:   Wed Dec 22 14:21:21 2010 +0800

st/egl: Fix eglCopyBuffers.

Flush before presenting.
(cherry picked from commit a31e2e3312cae5c4253a47dc30926ceb8c821ce3)

---

 .../state_trackers/egl/common/egl_g3d_api.c        |   11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/gallium/state_trackers/egl/common/egl_g3d_api.c b/src/gallium/state_trackers/egl/common/egl_g3d_api.c
index 2b412a4..ef1c116 100644
--- a/src/gallium/state_trackers/egl/common/egl_g3d_api.c
+++ b/src/gallium/state_trackers/egl/common/egl_g3d_api.c
@@ -670,14 +670,13 @@ egl_g3d_copy_buffers(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *surf,
 
    ptex = get_pipe_resource(gdpy->native, nsurf, NATIVE_ATTACHMENT_FRONT_LEFT);
    if (ptex) {
-      struct pipe_resource *psrc = gsurf->render_texture;
       struct pipe_box src_box;
+
       u_box_origin_2d(ptex->width0, ptex->height0, &src_box);
-      if (psrc) {
-         gdpy->pipe->resource_copy_region(gdpy->pipe, ptex, 0, 0, 0, 0,
-               gsurf->render_texture, 0, &src_box);
-         nsurf->present(nsurf, NATIVE_ATTACHMENT_FRONT_LEFT, FALSE, 0);
-      }
+      gdpy->pipe->resource_copy_region(gdpy->pipe, ptex, 0, 0, 0, 0,
+            gsurf->render_texture, 0, &src_box);
+      gdpy->pipe->flush(gdpy->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
+      nsurf->present(nsurf, NATIVE_ATTACHMENT_FRONT_LEFT, FALSE, 0);
 
       pipe_resource_reference(&ptex, NULL);
    }