-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#ifndef MSP_GL_EXTENSION_H_
#define MSP_GL_EXTENSION_H_
-#include <msp/core/except.h>
+#include <string>
namespace Msp {
namespace GL {
*/
bool is_supported(const std::string &);
+/**
+Checks that an extension is supported and throws if it isn't.
+*/
+void require_extension(const std::string &);
+
+/**
+RAII version of require_extension. Useful as a static local variable.
+*/
+struct RequireExtension
+{
+ RequireExtension(const std::string &e) { require_extension(e); }
+};
+
/**
Returns the OpenGL version number, as reported by the implementation.
Functions up to the returned version are safe to use.
const Version &get_gl_version();
/**
-Checks that an extension is supported and throws if it isn't.
+Indicates whether the OpenGL version is at least a.b.
*/
-void require_extension(const std::string &);
+bool is_version_at_least(unsigned a, unsigned b);
/**
Checks that the OpenGL version is at least a.b and throws if it isn't.
void require_version(unsigned a, unsigned b);
/**
-Returns the address of an extension function.
+RAII version of require_version. Useful as a static local variable.
+*/
+struct RequireVersion
+{
+ RequireVersion(unsigned a, unsigned b) { require_version(a, b); }
+};
+
+/**
+Returns the address of an extension function. Only indended for internal use.
*/
ExtFunc *get_proc_address(const std::string &);