added onGlContextError

libs/sdl/sdl/Window.hx

@@ -30,14 +30,25 @@ class Window {
 		win = winCreate(@:privateAccess title.toUtf8(), width, height);
 		if( win == null ) throw "Failed to create window";
 		glctx = winGetGLContext(win);
-		if( glctx == null )
-			throw "Failed to init GL Context (OpenGL 3.2+ required)";
-		if( !GL.init() )
-			throw "Failed to init GL API";
+		if( glctx == null || !GL.init() ) {
+			destroy();
+			onGlContextError();
+		}
 		windows.push(this);
 		vsync = true;
 	}
 
+	public static dynamic function onGlContextError() {
+		var devices = Sdl.getDevices();
+		var device = devices[0];
+		if( device == null ) device = "Unknown";
+		var flags = new haxe.EnumFlags<hl.UI.DialogFlags>();
+		flags.set(IsError);
+		var msg = 'The application was unable to create an OpenGL context\nfor your $device video card.\nOpenGL 3.2+ is required, please update your driver.';
+		hl.UI.dialog("OpenGL Error", msg, flags);
+		Sys.exit(-1);
+	}
+
 	function set_displayMode(mode) {
 		if( mode == displayMode )
 			return mode;