add openglexample from OpenHMD

examples/opengl/gl.h

@@ -0,0 +1,34 @@
+/*
+ * OpenHMD - Free and Open Source API and drivers for immersive technology.
+ * Copyright (C) 2013 Fredrik Hultin.
+ * Copyright (C) 2013 Jakob Bornecrantz.
+ * Distributed under the Boost 1.0 licence, see LICENSE for full text.
+ */
+
+/* OpenGL Test - Interface For GL Helper Functions */
+
+#ifndef GL_H
+#define GL_H
+
+#define GL_GLEXT_PROTOTYPES
+#include <GL/gl.h>
+#include <GL/glext.h>
+
+#include <lvrc.h>
+
+typedef struct {
+	unsigned int w, h;
+	EGLDisplay display;
+	EGLSurface surface;
+	EGLContext context;
+	int is_fullscreen;
+} gl_ctx;
+
+void ortho(gl_ctx* ctx);
+void perspective(gl_ctx* ctx);
+void init_gl(gl_ctx* ctx, struct lvrcInstance * compositor);
+void draw_cube(void);
+void create_fbo(int eye_width, int eye_height, GLuint* fbo, GLuint* color_tex, GLuint* depth_tex);
+
+
+#endif