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

*/
// vid.h -- video driver defs

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

typedef unsigned int pixel_t; // typedef byte pixel_t
#define BILINEAR
#define LRP(X,Y,L,IL,B)  ((((((X>>B)&0xff)*IL)+(((Y>>B)&0xff)*L))>>16)<<B)
#define LRPM(X,Y,L,IL,M)  (((((X&M)*IL)+((Y&M)*L))>>16)&M)

typedef struct vrect_s {
    int				x,y,width,height;
    struct vrect_s	*pnext;
} vrect_t;

typedef struct {
    pixel_t			*buffer;		// invisible buffer
    byte			*colormap;		// 256 * VID_GRADES size
    unsigned short	*colormap16;	// 256 * VID_GRADES size
    int				fullbright;		// index of first fullbright color
    unsigned		rowbytes;	// may be > width if displayed in a window
    unsigned		width;
    unsigned		height;
    float			aspect;		// width / height -- < 0 is taller than wide
    int				numpages;
    int				recalc_refdef;	// if true, recalc vid-based stuff
    pixel_t			*conbuffer;
    int				conrowbytes;
    unsigned		conwidth;
    unsigned		conheight;
    int				maxwarpwidth;
    int				maxwarpheight;
    pixel_t			*direct;		// direct drawing to framebuffer, if not
    //  NULL
} viddef_t;

extern	viddef_t	vid;				// global video state
extern	unsigned short	d_8to16table[256];
extern	unsigned int	d_8to24table[256];
extern void (*vid_menudrawfn)(void);
extern void (*vid_menukeyfn)(int key);

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

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

void	VID_Init(unsigned char *palette);
// 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_Shutdown(void);
// Called at shutdown

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

int VID_SetMode(int modenum, unsigned char *palette);
// sets the mode; only used by the Quake engine for resetting to mode 0 (the
// base mode) on memory allocation failures

void VID_HandlePause(qboolean pause);
// called only on Win32, when pause happens, so the mouse can be released

