qboolean SCR_ScreenShot(char *filename, unsigned char *buffer1, unsigned char *buffer2, unsigned char *buffer3, int x, int y, int width, int height, qboolean flipx, qboolean flipy, qboolean flipdiagonal, qboolean jpeg, qboolean gammacorrect);
// used by R_Envmap_f and internally in backend, clears the frame
void R_ClearScreen(void);
-// invoke refresh of frame
-void SCR_UpdateScreen(void);
// invoke refresh of loading plaque (nothing else seen)
void SCR_UpdateLoadingScreen(qboolean clear);