From f0bf34fceed93398a69fd11b8c61bc80e3d7d6ab Mon Sep 17 00:00:00 2001
From: Zachary Lund <admin@computerquip.com>
Date: Wed, 5 Aug 2015 18:14:12 -0500
Subject: [PATCH] Explicitly request a context version.

Mesa doesn't support ARB_compatibility. It also doesn't default to the latest context. We can either make a context and test GL_VERSION... or just try to make contexts until we get one we can use.
---
 tests/hlsl2glsltest/hlsl2glsltest.cpp | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/tests/hlsl2glsltest/hlsl2glsltest.cpp b/tests/hlsl2glsltest/hlsl2glsltest.cpp
index a9df844..006f84e 100644
--- a/tests/hlsl2glsltest/hlsl2glsltest.cpp
+++ b/tests/hlsl2glsltest/hlsl2glsltest.cpp
@@ -75,7 +75,7 @@ static void logf(const char* format, ...)
 #include <dirent.h>
 #include <string.h>
 #include <GL/glew.h>
-#include <GL/glut.h>
+#include <GL/freeglut.h>
 
 #endif
 #include "../../include/hlsl2glsl.h"
@@ -259,9 +259,25 @@ static bool InitializeOpenGL ()
 #else
         int argc = 0;
         char** argv = NULL;
+
         glutInit(&argc, argv);
-        glutCreateWindow("hlsl2glsltest");
+        int tmp_window = glutCreateWindow("hlsl2glsltest");
+
         glewInit();
+
+        if (GLEW_VERSION_3_2) { /* GLSL 1.5 */
+        	glutInitContextVersion(3, 2);
+        } else if (GLEW_VERSION_3_1) { /* GLSL 1.4 */
+        	glutInitContextVersion(3, 1);
+        } else if (GLEW_VERSION_2_1) { /* GLSL 1.2 */
+        	glutInitContextVersion(2, 1);
+        }
+
+        glutInitContextProfile(GLUT_CORE_PROFILE);
+
+        glutDestroyWindow(tmp_window);
+        glutCreateWindow("hlsl2glsltest");
+
 #endif
 	
 	// check if we have GLSL