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st/mesa: check if _mesa_create_context() returns NULL

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In some cases _mesa_create_context() can return NULL an in the mesa
state tracker, we do not concider the case, which may cause issues
within st_create_context_priv()

This patch adds a simple check (similar to the one in the dri drivers)

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Emil Velikov 2011-07-11 15:42:15 +01:00 • committed by Brian Paul
parent 4ef9c3d21b
commit 1ab5e15242
1 changed files with 3 additions and 0 deletions
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3
src/mesa/state_tracker/st_context.c
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@ -179,6 +179,9 @@ struct st_context *st_create_context(gl_api api, struct pipe_context *pipe,
st_init_driver_functions(&funcs);
ctx = _mesa_create_context(api, visual, shareCtx, &funcs, NULL);
if (!ctx) {
return NULL;
}
/* XXX: need a capability bit in gallium to query if the pipe
* driver prefers DP4 or MUL/MAD for vertex transformation.