Source code of Windows XP (NT5)
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/******************************Module*Header*******************************\
* Module Name: glscreen.h** OpenGL direct screen access support** Copyright (c) 1994 Microsoft Corporation*\**************************************************************************/
#ifndef _GLSCREEN_H_
#define _GLSCREEN_H_
#include <ddraw.h>
//
// Structure that contains all the info we need to access the framebuffer
//
typedef struct _SCREENINFO_ { LPDIRECTDRAW pdd; GLDDSURF gdds;} SCREENINFO;
//
// Global pointer to SCREENINFO structure that is non-NULL if and only if
// direct access to the framebuffer is available.
//
extern SCREENINFO *gpScreenInfo;
//
// Direct access macros:
//
// GLDIRECTSCREEN TRUE if direct access is enabled
// GLSCREENINFO Pointer to global SCREENINFO.
//
#define GLDIRECTSCREEN ( gpScreenInfo != NULL )
#define GLSCREENINFO ( gpScreenInfo )
#endif
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