Mesa (master): st/dri: avoid segfault if we can't get a pixmap's buffers

[Ben Skeggs]

Module: Mesa
Branch: master
Commit: d47de5054091a5d1fa9b19687ac80bcdc39a5f8f
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d47de5054091a5d1fa9b19687ac80bcdc39a5f8f

Author: Ben Skeggs <bskeggs at redhat.com>
Date:   Mon Oct  5 15:51:47 2009 +1000

st/dri: avoid segfault if we can't get a pixmap's buffers

Signed-off-by: Ben Skeggs <bskeggs at redhat.com>

---

 src/gallium/state_trackers/dri/dri_drawable.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/gallium/state_trackers/dri/dri_drawable.c b/src/gallium/state_trackers/dri/dri_drawable.c
index 6aafb38..3f8dc8d 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.c
+++ b/src/gallium/state_trackers/dri/dri_drawable.c
@@ -249,6 +249,9 @@ void dri2_set_tex_buffer2(__DRIcontext *pDRICtx, GLint target,
    dri_get_buffers(drawable->dPriv);
    st_get_framebuffer_surface(drawable->stfb, ST_SURFACE_FRONT_LEFT, &ps);
 
+   if (!ps)
+      return;
+
    st_bind_texture_surface(ps, target == GL_TEXTURE_2D ? ST_TEXTURE_2D :
                            ST_TEXTURE_RECT, 0, drawable->color_format);
 }