mesa: Throw an error when starting conditional render on an active query.
From the NV_conditional_render spec:
BeginQuery sets the active query object name for the query type given by
<target> to <id>. If BeginQuery is called with an <id> of zero, if the
active query object name for <target> is non-zero, if <id> is the active
query object name for any query type, or if <id> is the active query
object for condtional rendering (Section 2.X), the error INVALID OPERATION
is generated.
Fixes piglit nv_conditional_render-begin-while-active.
Reviewed-by: Brian Paul <brianp@vmware.com>
diff --git a/src/mesa/main/condrender.c b/src/mesa/main/condrender.c
index c8195a5..57f3715 100644
--- a/src/mesa/main/condrender.c
+++ b/src/mesa/main/condrender.c
@@ -73,7 +73,7 @@
}
ASSERT(q->Id == queryId);
- if (q->Target != GL_SAMPLES_PASSED) {
+ if (q->Target != GL_SAMPLES_PASSED || q->Active) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBeginConditionalRender()");
return;
}