X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fextension.h;h=1b149367eecd7ef9c5978138a0a41a837ee7b9c4;hb=0ab875bdc9fbf84ecfce883b188410bb45882447;hp=85b4fc4af27e0418bf9d4c09932ad835899724f6;hpb=bd994b9a1376a021022e5145f30b7566e7923e4d;p=libs%2Fgl.git

diff --git a/source/extension.h b/source/extension.h
index 85b4fc4a..1b149367 100644
--- a/source/extension.h
+++ b/source/extension.h
@@ -29,6 +29,8 @@ struct Version
 	Version(const std::string &);
 
 	bool operator>=(const Version &) const;
+	bool operator<(const Version &o) const { return !(*this>=o); }
+	operator bool() const { return major || minor; }
 };
 
 
@@ -66,9 +68,17 @@ struct Require
 
 typedef void ExtFunc();
 
-/** Indicates whether an extension is supported. */
+/** Checks for extension support.  Only intended for internal use. */
 bool is_supported(const std::string &);
 
+/** Checks for OpenGL version support.  Only intended for internal use. */
+bool is_supported(const Version &, const Version & = Version());
+
+/** Indicates whether an extension has been disabled, either explicitly through
+the MSPGL_DISABLE_EXTENSIONS environment variable or implicitly as a workaround
+for a driver bug.  Only intended for internal use. */
+bool is_disabled(const std::string &);
+
 /** Returns the API for which the library was compiled. */
 GLApi get_gl_api();
 
@@ -81,9 +91,6 @@ const Version &get_gl_version();
 /** Returns the GLSL version number, as reported by the implementation. */
 const Version &get_glsl_version();
 
-/** Indicates whether the OpenGL version is at least a.b. */
-bool is_version_at_least(unsigned a, unsigned b);
-
 /** Returns the address of an extension function.  Only indended for internal
 use. */
 ExtFunc *get_proc_address(const std::string &);