Fix an incorrect negation

[libs/gl.git] / source / extension.h

diff --git a/source/extension.h b/source/extension.h
index df6bd78d35fbdd26264c1e286608a916d1bc0f94..cf824e24b0a189b65fc88de30adc6dc862fb5e09 100644 (file)
--- a/source/extension.h
+++ b/source/extension.h
@@ -6,6 +6,19 @@
 namespace Msp {
 namespace GL {
 
+enum GLApi
+{
+       OPENGL,
+       OPENGL_ES2
+};
+
+enum GLProfile
+{
+       CORE_PROFILE,
+       COMPATIBILITY_PROFILE
+};
+
+
 struct Version
 {
        unsigned short major;
@@ -16,9 +29,15 @@ 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; }
 };
 
 
+/**
+Holds metadata about an extension.  Evaluates to true if the extension is
+supported.
+*/
 class Extension
 {
 public:
@@ -53,14 +72,28 @@ 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();
+
+/** Returns the OpenGL profile for the active context. */
+GLProfile get_gl_profile();
+
 /** Returns the OpenGL version number, as reported by the implementation. */
 const Version &get_gl_version();
 
-/** Indicates whether the OpenGL version is at least a.b. */
-bool is_version_at_least(unsigned a, unsigned b);
+/** Returns the GLSL version number, as reported by the implementation. */
+const Version &get_glsl_version();
 
 /** Returns the address of an extension function.  Only indended for internal
 use. */