video.h

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

/*
 *  FreeLoader
 *  Copyright (C) 1998-2003  Brian Palmer  <[e-mail]>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __VIDEO_H
#define __VIDEO_H

typedef struct
{
  UCHAR Red;
  UCHAR Green;
  UCHAR Blue;
} PACKED PALETTE_ENTRY, *PPALETTE_ENTRY;

extern	PVOID	VideoOffScreenBuffer;

USHORT		BiosIsVesaSupported(VOID);						// Implemented in i386vid.c, returns the VESA version

PVOID	VideoAllocateOffScreenBuffer(VOID);				// Returns a pointer to an off-screen buffer sufficient for the current video mode

VOID	VideoCopyOffScreenBufferToVRAM(VOID);

VOID	VideoSavePaletteState(PPALETTE_ENTRY Palette, ULONG ColorCount);
VOID	VideoRestorePaletteState(PPALETTE_ENTRY Palette, ULONG ColorCount);

VOID	VideoSetAllColorsToBlack(ULONG ColorCount);
VOID	VideoFadeIn(PPALETTE_ENTRY Palette, ULONG ColorCount);
VOID	VideoFadeOut(ULONG ColorCount);


#endif  // defined __VIDEO_H