From b3923283d2a97a4243843c5465ec6e8828e68886 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@zeromus.org>
Date: Tue, 16 Dec 2014 20:24:14 +0000
Subject: [PATCH] emuhawk - fallback to gdi+ on systems with less than 2.0
 opengl

---
 BizHawk.Client.EmuHawk/Program.cs                  | 11 +++++++++++
 Bizware/BizHawk.Bizware.BizwareGL.OpenTK/IGL_TK.cs | 12 ++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/BizHawk.Client.EmuHawk/Program.cs b/BizHawk.Client.EmuHawk/Program.cs
index 45c6c1c078..64b5466392 100644
--- a/BizHawk.Client.EmuHawk/Program.cs
+++ b/BizHawk.Client.EmuHawk/Program.cs
@@ -95,12 +95,23 @@ namespace BizHawk.Client.EmuHawk
 			GlobalWin.CR_GL = GlobalWin.GLManager.GetContextForIGL(GlobalWin.GL);
 
 			//now create the "GL" context for the display method. we can reuse the IGL_TK context if opengl display method is chosen
+REDO_DISPMETHOD:
 			if (Global.Config.DispMethod == Config.EDispMethod.GdiPlus)
 				GlobalWin.GL = new Bizware.BizwareGL.Drivers.GdiPlus.IGL_GdiPlus();
 			else if (Global.Config.DispMethod == Config.EDispMethod.SlimDX9)
 				GlobalWin.GL = new Bizware.BizwareGL.Drivers.SlimDX.IGL_SlimDX9();
 			else
+			{
 				GlobalWin.GL = GlobalWin.IGL_GL;
+				//check the opengl version and dont even try to boot this crap up if its too old
+				int version = GlobalWin.IGL_GL.Version;
+				if (version < 200)
+				{
+					//fallback
+					Global.Config.DispMethod = Config.EDispMethod.GdiPlus;
+					goto REDO_DISPMETHOD;
+				}
+			}
 
 			//WHY do we have to do this? some intel graphics drivers (ig7icd64.dll 10.18.10.3304 on an unknown chip on win8.1) are calling SetDllDirectory() for the process, which ruins stuff.
 			//The relevant initialization happened just before in "create IGL context".
diff --git a/Bizware/BizHawk.Bizware.BizwareGL.OpenTK/IGL_TK.cs b/Bizware/BizHawk.Bizware.BizwareGL.OpenTK/IGL_TK.cs
index b82390bf07..29c473e245 100644
--- a/Bizware/BizHawk.Bizware.BizwareGL.OpenTK/IGL_TK.cs
+++ b/Bizware/BizHawk.Bizware.BizwareGL.OpenTK/IGL_TK.cs
@@ -44,6 +44,18 @@ namespace BizHawk.Bizware.BizwareGL.Drivers.OpenTK
 
 		public string API { get { return "OPENGL"; } }
 
+		public int Version
+		{
+			get
+			{
+				int major, minor;
+				//other overloads may not exist...
+				GL.GetInteger(GetPName.MajorVersion, out major);
+				GL.GetInteger(GetPName.MajorVersion, out minor);
+				return major * 100 + minor * 10;
+			}
+		}
+
 		public IGL_TK()
 		{
 			//make an 'offscreen context' so we can at least do things without having to create a window