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path: root/mesalib/src/mesa/state_tracker/st_cb_viewport.c
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Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_cb_viewport.c')
-rw-r--r--mesalib/src/mesa/state_tracker/st_cb_viewport.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_cb_viewport.c b/mesalib/src/mesa/state_tracker/st_cb_viewport.c
index d4742eb89..d654ed6e7 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_viewport.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_viewport.c
@@ -43,7 +43,9 @@ static INLINE struct st_framebuffer *
st_ws_framebuffer(struct gl_framebuffer *fb)
{
/* FBO cannot be casted. See st_new_framebuffer */
- return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL);
+ if (fb && _mesa_is_winsys_fbo(fb))
+ return (struct st_framebuffer *) fb;
+ return NULL;
}
static void st_viewport(struct gl_context * ctx, GLint x, GLint y,