/*
 * 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)

// a pixel can be one, two, or four bytes
typedef byte  pixel_t;

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

typedef struct {
    pixel_t      *buffer;              // invisible buffer
    pixel_t      *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
    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 d_8to24table[256];
extern qboolean vid_windowedmouse;
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_LockBuffer (void);
void          VID_UnlockBuffer (void);

void          VID_SetDeviceGammaRamp (unsigned short *ramps);
extern qboolean vid_hwgamma_enabled;

extern qboolean gl_have_stencil;
