diff --git a/d1x-rebirth/include/ogl_init.h b/common/include/ogl_init.h
similarity index 100%
rename from d1x-rebirth/include/ogl_init.h
rename to common/include/ogl_init.h
diff --git a/d2x-rebirth/include/ogl_init.h b/d2x-rebirth/include/ogl_init.h
deleted file mode 100644
index f489d4aa7..000000000
--- a/d2x-rebirth/include/ogl_init.h
+++ /dev/null
@@ -1,112 +0,0 @@
-/* interface to OpenGL functions
- * Added 9/15/99 Matthew Mueller
- * Got rid of OpenGL-internal stuff 2004-5-16 Martin Schaffner
- */
-
-#ifndef _OGL_INIT_H_ 
-#define _OGL_INIT_H_
-
-#ifdef _MSC_VER
-#include <windows.h>
-#include <stddef.h>
-#endif
-
-#ifdef _WIN32
-#include "loadgl.h"
-int ogl_init_load_library(void);
-#else
-# define GL_GLEXT_LEGACY
-# if defined(__APPLE__) && defined(__MACH__)
-#  include <OpenGL/gl.h>
-#  include <OpenGL/glu.h>
-# else
-#  define GL_GLEXT_PROTOTYPES
-#  ifdef OGLES
-#  include <GLES/gl.h>
-#  else
-#  include <GL/gl.h>
-#  endif
-# endif
-# ifndef GL_CLAMP_TO_EDGE	// hack for Mac OS 9, others?
-#  define GL_CLAMP_TO_EDGE GL_CLAMP
-# endif
-#endif
-
-#include "gr.h"
-#include "palette.h"
-#include "pstypes.h"
-
-#ifndef GL_VERSION_1_1
-#ifdef GL_EXT_texture
-#define GL_INTENSITY4 GL_INTENSITY4_EXT
-#define GL_INTENSITY8 GL_INTENSITY8_EXT
-#endif
-#endif
-
-#ifndef GL_TEXTURE_MAX_ANISOTROPY_EXT
-#define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
-#endif
-#ifndef GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT
-#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
-#endif
-
-/* we need to export ogl_texture for 2d/font.c */
-typedef struct _ogl_texture {
-	GLuint handle;
-	GLint internalformat;
-	GLenum format;
-	int w,h,tw,th,lw;
-	int bytesu;
-	int bytes;
-	GLfloat u,v;
-	GLfloat prio;
-	int wrapstate;
-	unsigned long numrend;
-} ogl_texture;
-
-extern ogl_texture* ogl_get_free_texture();
-void ogl_init_texture(ogl_texture* t, int w, int h, int flags);
-
-extern int ogl_rgba_internalformat;
-extern int ogl_rgb_internalformat;
-
-void ogl_init_shared_palette(void);
-
-extern int gl_initialized;
-
-extern int active_texture_unit;
-extern GLfloat ogl_maxanisotropy;
-
-void ogl_setActiveTexture(int t);
-
-int ogl_init_window(int x, int y);//create a window/switch modes/etc
-
-#define OGL_FLAG_MIPMAP (1 << 0)
-#define OGL_FLAG_NOCOLOR (1 << 1)
-#define OGL_FLAG_ALPHA (1 << 31) // not required for ogl_loadbmtexture, since it uses the BM_FLAG_TRANSPARENT, but is needed for ogl_init_texture.
-void ogl_loadbmtexture_f(grs_bitmap *bm, int texfilt);
-void ogl_freebmtexture(grs_bitmap *bm);
-
-void ogl_start_frame(void);
-void ogl_end_frame(void);
-void ogl_swap_buffers_internal(void);
-void ogl_set_screen_mode(void);
-void ogl_cache_level_textures(void);
-
-void ogl_urect(int left, int top, int right, int bot);
-bool ogl_ubitmapm_cs(int x, int y,int dw, int dh, grs_bitmap *bm,int c, int scale);
-bool ogl_ubitblt_i(int dw, int dh, int dx, int dy, int sw, int sh, int sx, int sy, grs_bitmap * src, grs_bitmap * dest, int texfilt);
-bool ogl_ubitblt(int w, int h, int dx, int dy, int sx, int sy, grs_bitmap * src, grs_bitmap * dest);
-void ogl_upixelc(int x, int y, int c);
-unsigned char ogl_ugpixel( grs_bitmap * bitmap, int x, int y );
-void ogl_ulinec(int left, int top, int right, int bot, int c);
-
-#include "3d.h"
-bool g3_draw_tmap_2(int nv,g3s_point **pointlist,g3s_uvl *uvl_list,g3s_lrgb *light_rgb, grs_bitmap *bmbot,grs_bitmap *bm, int orient);
-
-void ogl_draw_vertex_reticle(int cross,int primary,int secondary,int color,int alpha,int size_offs);
-void ogl_toggle_depth_test(int enable);
-void ogl_set_blending();
-int pow2ize(int x);//from ogl.c
-
-#endif /* _OGL_INIT_H_ */