-inline void SDLInitVideoDisplay(void);
-inline void SDLInitVideoBuffer(DrawBuffer **, DrawWindow **, boolean);
-inline boolean SDLSetVideoMode(DrawBuffer **, boolean);
-inline void SDLCopyArea(Bitmap *, Bitmap *, int, int, int, int, int, int, int);
-inline void SDLFillRectangle(Bitmap *, int, int, int, int, unsigned int);
-inline void SDLDrawSimpleLine(SDL_Surface *, int, int, int, int, unsigned int);
-inline void SDLDrawLine(SDL_Surface *, int, int, int, int, Uint32);
-/* functions from SGE library */
-void sge_Line(SDL_Surface *, Sint16, Sint16, Sint16, Sint16, Uint32);
-
-inline boolean SDLOpenAudio(void);
-inline void SDLCloseAudio(void);
+boolean SDLSetNativeSurface(SDL_Surface **);
+SDL_Surface *SDLGetNativeSurface(SDL_Surface *);
+void SDLCreateBitmapTextures(Bitmap *);
+void SDLFreeBitmapTextures(Bitmap *);
+
+#if defined(TARGET_SDL2)
+SDL_Surface *SDL_DisplayFormat(SDL_Surface *);
+void SDLSetWindowScaling(int);
+void SDLSetWindowScalingQuality(char *);
+void SDLSetWindowFullscreen(boolean);
+void SDLRedrawWindow();
+#endif
+
+void SDLSetWindowTitle(void);
+
+void SDLLimitScreenUpdates(boolean);
+void SDLInitVideoDisplay(void);
+void SDLInitVideoBuffer(DrawBuffer **, DrawWindow **, boolean);
+boolean SDLSetVideoMode(DrawBuffer **, boolean);
+void SDLCreateBitmapContent(Bitmap *, int, int, int);
+void SDLFreeBitmapPointers(Bitmap *);
+void SDLCopyArea(Bitmap *, Bitmap *, int, int, int, int, int, int, int);
+void SDLBlitTexture(Bitmap *, int, int, int, int, int, int, int);
+void SDLFillRectangle(Bitmap *, int, int, int, int, Uint32);
+void SDLFadeRectangle(Bitmap *, int, int, int, int, int, int, int,
+ void (*draw_border_function)(void));
+void SDLDrawSimpleLine(Bitmap *, int, int, int, int, Uint32);
+void SDLDrawLine(Bitmap *, int, int, int, int, Uint32);
+Pixel SDLGetPixel(Bitmap *, int, int);
+void SDLPutPixel(Bitmap *, int, int, Pixel);
+
+void SDLInvertArea(Bitmap *, int, int, int, int, Uint32);
+void SDLCopyInverseMasked(Bitmap *, Bitmap *, int, int, int, int, int, int);
+
+Bitmap *SDLZoomBitmap(Bitmap *, int, int);
+
+Bitmap *SDLLoadImage(char *);
+
+void SDLSetMouseCursor(struct MouseCursorInfo *);
+
+void SDLOpenAudio(void);
+void SDLCloseAudio(void);
+
+void SDLNextEvent(Event *);
+void SDLHandleWindowManagerEvent(Event *);
+
+void HandleJoystickEvent(Event *);
+void SDLInitJoysticks(void);
+boolean SDLReadJoystick(int, int *, int *, boolean *, boolean *);