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-rw-r--r--src/gallium/state_trackers/wgl/shared/stw_device.c41
1 files changed, 21 insertions, 20 deletions
diff --git a/src/gallium/state_trackers/wgl/shared/stw_device.c b/src/gallium/state_trackers/wgl/shared/stw_device.c
index 1b4a2d5cdbd..ce466241463 100644
--- a/src/gallium/state_trackers/wgl/shared/stw_device.c
+++ b/src/gallium/state_trackers/wgl/shared/stw_device.c
@@ -67,35 +67,36 @@ stw_flush_frontbuffer(struct pipe_screen *screen,
struct stw_framebuffer *fb;
fb = stw_framebuffer_from_hdc( hdc );
- assert(fb);
- if (fb == NULL)
- return;
-
- pipe_mutex_lock( fb->mutex );
+ /* fb can be NULL if window was destroyed already */
+ if (fb) {
+ pipe_mutex_lock( fb->mutex );
#if DEBUG
- {
- struct pipe_surface *surface2;
-
- if(!st_get_framebuffer_surface( fb->stfb, ST_SURFACE_FRONT_LEFT, &surface2 ))
- assert(0);
- else
- assert(surface2 == surface);
- }
+ {
+ struct pipe_surface *surface2;
+
+ if(!st_get_framebuffer_surface( fb->stfb, ST_SURFACE_FRONT_LEFT, &surface2 ))
+ assert(0);
+ else
+ assert(surface2 == surface);
+ }
#endif
#ifdef DEBUG
- if(stw_dev->trace_running) {
- screen = trace_screen(screen)->screen;
- surface = trace_surface(surface)->surface;
- }
+ if(stw_dev->trace_running) {
+ screen = trace_screen(screen)->screen;
+ surface = trace_surface(surface)->surface;
+ }
#endif
+ }
stw_winsys->flush_frontbuffer(screen, surface, hdc);
- stw_framebuffer_update(fb);
-
- pipe_mutex_unlock( fb->mutex );
+ if(fb) {
+ stw_framebuffer_update(fb);
+
+ pipe_mutex_unlock( fb->mutex );
+ }
}