quakeforge/include/QF/vid.h

/*
	vid.h

	video driver defs

	Copyright (C) 1996-1997  Id Software, Inc.

	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:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifndef __vid_h_
#define __vid_h_

#include "QF/qtypes.h"
#include "QF/vrect.h"

#define VID_CBITS	6
#define VID_GRADES	(1 << VID_CBITS)

struct cvar_s;
extern byte   *vid_colormap;
extern unsigned char d_15to8table[65536];

extern struct cvar_s *vid_fullscreen;
extern struct cvar_s *vid_system_gamma;
extern struct cvar_s *vid_width;
extern struct cvar_s *vid_height;
extern struct cvar_s *vid_bitdepth;

typedef struct {
	qboolean		 initialized;
	void			*buffer;		// invisible buffer
	short			*zbuffer;
	void			*surfcache;
	byte            *basepal;		// 256 * 3
	byte            *palette;		// 256 * 3
	byte			*colormap8;		// 256 * VID_GRADES size
	unsigned short	*colormap16;	// 256 * VID_GRADES size
	unsigned int	*colormap32;	// 256 * VID_GRADES size
	int				 fullbright;	// index of first fullbright color
	unsigned int	 rowbytes;		// may be > width if displayed in a window
	unsigned int	 width;		
	unsigned int	 height;
	float			 aspect;	// width / height -- < 1 is taller than wide
	int				 numpages;
	qboolean		 recalc_refdef;	// if true, recalc vid-based stuff
	qboolean		 cshift_changed;
	quat_t           cshift_color;
	void			*conbuffer;
	int				 conrowbytes;
	unsigned int	 conwidth;
	unsigned int	 conheight;
	int				 maxwarpwidth;
	int				 maxwarpheight;
	byte			*direct;		// direct drawing to framebuffer, if not
									//  NULL
	int			   (*surf_cache_size)(int width, int height);
	void		   (*flush_caches)(void);
	void		   (*init_caches)(void *cache, int size);
	void		   (*do_screen_buffer)(void);
} viddef_t;

extern viddef_t 		vid;				// global video state
extern unsigned short	d_8to16table[256];
extern unsigned int 	d_8to24table[256];

extern byte 			gammatable[256];
extern struct cvar_s	*vid_gamma;
extern qboolean			vid_gamma_avail;

// called at startup and after any gamma correction
void VID_SetPalette (unsigned char *palette);
void VID_Init8bitPalette (void);

// called for bonus and pain flashes, and for underwater color changes
void VID_ShiftPalette (unsigned char *palette);

void VID_Init_Cvars (void);

// Called at startup to set up translation tables, takes 256 8 bit RGB values
// the palette data will go away after the call, so it must be copied off if
// the video driver will need it again
void VID_Init (byte *palette, byte *colormap);

// Called at shutdown
void VID_Shutdown (void);

// flushes the given rectangles from the view buffer to the screen
void VID_Update (vrect_t *rects);

// sets the mode; used only by the Quake engine for resetting to mode 0 (the
// base mode) on memory allocation failures
// or not
// int VID_SetMode (int modenum, unsigned char *palette);

void VID_InitBuffers (void);
void VID_LockBuffer (void);
void VID_UnlockBuffer (void);

qboolean VID_Is8bit (void);

void VID_RaiseWindow (void);
void VID_MinimiseWindow (void);
void VID_SetCaption (const char *text);
// used to set window caption

void VID_GetWindowSize (int def_w, int def_h);

void VID_InitGamma (unsigned char *);
double VID_GetGamma (void);
qboolean VID_SetGamma (double);
void VID_UpdateGamma (struct cvar_s *);

void GL_Init_Common (void);

void VID_MakeColormaps (int fullbrights, byte *pal);

void VGA_UpdatePlanarScreen (void *srcbuffer);

#endif	// __vid_h_