From 8b5c741358fa3e3b3f21fe0fdd2530cf3c17802a Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@zdoom.fake>
Date: Tue, 26 Apr 2016 15:19:38 +0200
Subject: [PATCH] - check the proper command line option for rejecting a core
 profile.

---
 src/win32/win32gliface.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/win32/win32gliface.cpp b/src/win32/win32gliface.cpp
index 27cb562e2d..4ba6ad3007 100644
--- a/src/win32/win32gliface.cpp
+++ b/src/win32/win32gliface.cpp
@@ -747,8 +747,12 @@ typedef const GLubyte * (APIENTRY *PFNGLGETSTRINGIPROC)(GLenum, GLuint);
 
 bool Win32GLVideo::checkCoreUsability()
 {
-	// if we explicitly want to disable 4.x features this must fail.
-	if (Args->CheckParm("-gl3")) return false;
+	const char *version = Args->CheckValue("-glversion");
+	if (version != NULL)
+	{
+		if (strtod(version, NULL) < 4.0) return false;
+	}
+	if (Args->CheckParm("-noshader")) return false;
 
 	// GL 4.4 implies GL_ARB_buffer_storage
 	if (strcmp((char*)glGetString(GL_VERSION), "4.4") >= 0) return true;