From bd994b9a1376a021022e5145f30b7566e7923e4d Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 6 Nov 2016 01:37:11 +0200
Subject: [PATCH] Add a function to determine the active GL profile

---
 source/extension.cpp | 19 +++++++++++++++++++
 source/extension.h   |  9 +++++++++
 2 files changed, 28 insertions(+)

diff --git a/source/extension.cpp b/source/extension.cpp
index 2183a965..78fc7e1c 100644
--- a/source/extension.cpp
+++ b/source/extension.cpp
@@ -132,6 +132,25 @@ GLApi get_gl_api()
 #endif
 }
 
+inline GLProfile _get_gl_profile()
+{
+	if(get_gl_api()==OPENGL && get_gl_version()>=Version(3, 0))
+	{
+		int mask;
+		glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &mask);
+		if(mask==GL_CONTEXT_CORE_PROFILE_BIT)
+			return CORE_PROFILE;
+	}
+
+	return COMPATIBILITY_PROFILE;
+}
+
+GLProfile get_gl_profile()
+{
+	static GLProfile profile = _get_gl_profile();
+	return profile;
+}
+
 inline Version _get_gl_version()
 {
 	const char *gl_ver_ptr = reinterpret_cast<const char *>(glGetString(GL_VERSION));
diff --git a/source/extension.h b/source/extension.h
index 671e4af9..85b4fc4a 100644
--- a/source/extension.h
+++ b/source/extension.h
@@ -12,6 +12,12 @@ enum GLApi
 	OPENGL_ES2
 };
 
+enum GLProfile
+{
+	CORE_PROFILE,
+	COMPATIBILITY_PROFILE
+};
+
 
 struct Version
 {
@@ -66,6 +72,9 @@ bool is_supported(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();
 
-- 
2.43.0