mesa: _mesa_Begin/EndConditionalRender() functions

For GL_NV_conditional_render and GL3.

The drawing functions don't check the query object yet.
No API dispatch yet.
diff --git a/src/mesa/main/condrender.h b/src/mesa/main/condrender.h
new file mode 100644
index 0000000..d55e980
--- /dev/null
+++ b/src/mesa/main/condrender.h
@@ -0,0 +1,45 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.8
+ *
+ * Copyright (C) 2009  VMware, Inc.   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef CONDRENDER_H
+#define CONDRENDER_H
+
+
+#include "glheader.h"
+#include "context.h"
+
+
+extern void GLAPIENTRY
+_mesa_BeginConditionalRender(GLuint queryId, GLenum mode);
+
+extern void APIENTRY
+_mesa_EndConditionalRender(void);
+
+extern GLboolean
+_mesa_check_conditional_render(GLcontext *ctx);
+
+
+#endif /* CONDRENDER_H */