diff -r 69f1dc50a1fa -r 40fc0deb388f hedgewars/SDLh.pas
--- a/hedgewars/SDLh.pas	Tue Jan 22 17:18:58 2008 +0000
+++ b/hedgewars/SDLh.pas	Fri Jan 25 20:47:50 2008 +0000
@@ -18,6 +18,7 @@
 
 unit SDLh;
 interface
+
 {$IFDEF LINUX}
 {$DEFINE UNIX}
 {$ENDIF}
@@ -61,6 +62,9 @@
 
       SDL_INIT_VIDEO  = $00000020;
       SDL_INIT_AUDIO  = $00000010;
+
+      SDL_GL_DOUBLEBUFFER = 5;
+      SDL_OPENGL          = 2;
       
 type PSDL_Rect = ^TSDL_Rect;
      TSDL_Rect = record
@@ -241,6 +245,9 @@
 function  SDL_LockMutex(mutex: PSDL_mutex): LongInt; cdecl; external SDLLibName name 'SDL_mutexP';
 function  SDL_UnlockMutex(mutex: PSDL_mutex): LongInt; cdecl; external SDLLibName name 'SDL_mutexV';
 
+function  SDL_GL_SetAttribute(attr: byte; value: LongInt): LongInt; cdecl; external SDLLibName;
+procedure SDL_GL_SwapBuffers(); cdecl; external SDLLibName;
+
 (*  TTF  *)
 
 const {$IFDEF WIN32}