X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fextension.h;h=cf824e24b0a189b65fc88de30adc6dc862fb5e09;hp=b44d89007c12610344347632c441d175cc5ff89a;hb=b38a4cba9d2a9963a0937757eff9e955f18ddf2a;hpb=5b3aa68610238de4e6f13c4bf9ec1745751e820c

diff --git a/source/extension.h b/source/extension.h
index b44d8900..cf824e24 100644
--- a/source/extension.h
+++ b/source/extension.h
@@ -30,9 +30,14 @@ struct Version
 
 	bool operator>=(const Version &) const;
 	bool operator<(const Version &o) const { return !(*this>=o); }
+	operator bool() const { return major || minor; }
 };
 
 
+/**
+Holds metadata about an extension.  Evaluates to true if the extension is
+supported.
+*/
 class Extension
 {
 public:
@@ -67,9 +72,17 @@ 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();
 
@@ -82,9 +95,6 @@ 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 &);