/***************************************************************************/
/*                                                                         */
/*                                                                         */
/* Raven 3D Engine                                                         */
/* Copyright (C) 1995 by Softdisk Publishing                               */
/*                                                                         */
/* Original Design:                                                        */
/*  John Carmack of id Software                                            */
/*                                                                         */
/* Enhancements by:                                                        */
/*  Robert Morgan of Channel 7............................Main Engine Code */
/*  Todd Lewis of Softdisk Publishing......Tools,Utilities,Special Effects */
/*  John Bianca of Softdisk Publishing..............Low-level Optimization */
/*  Carlos Hasan..........................................Music/Sound Code */
/*                                                                         */
/*                                                                         */
/***************************************************************************/

#ifndef D_VIDEO_H
#define D_VIDEO_H

/**** CONSTANTS ****/

#define outbyte(x,y)   (outp((unsigned)(x),(unsigned)(y)))
#define _outhword(x,y)  (outpw((unsigned)(x),(unsigned)(y)))
#define inbyte(x)      (inp((unsigned)(x)))
#define _inhword(x)     (inpw((unsigned)(x)))
#define CLI _disable()
#define STI _enable()

#define SC_INDEX          0x3C4
#define SC_RESET          0
#define SC_CLOCK          1
#define SC_MAPMASK        2
#define SC_CHARMAP        3
#define SC_MEMMODE        4
#define CRTC_INDEX        0x3D4
#define CRTC_H_TOTAL      0
#define CRTC_H_DISPEND    1
#define CRTC_H_BLANK      2
#define CRTC_H_ENDBLANK   3
#define CRTC_H_RETRACE    4
#define CRTC_H_ENDRETRACE 5
#define CRTC_V_TOTAL      6
#define CRTC_OVERFLOW     7
#define CRTC_ROWSCAN      8
#define CRTC_MAXSCANLINE  9
#define CRTC_CURSORSTART  10
#define CRTC_CURSOREND    11
#define CRTC_STARTHIGH    12
#define CRTC_STARTLOW     13
#define CRTC_CURSORHIGH   14
#define CRTC_CURSORLOW    15
#define CRTC_V_RETRACE    16
#define CRTC_V_ENDRETRACE 17
#define CRTC_V_DISPEND    18
#define CRTC_OFFSET       19
#define CRTC_UNDERLINE    20
#define CRTC_V_BLANK      21
#define CRTC_V_ENDBLANK   22
#define CRTC_MODE         23
#define CRTC_LINECOMPARE  24
#define GC_INDEX          0x3CE
#define GC_SETRESET       0
#define GC_ENABLESETRESET 1
#define GC_COLORCOMPARE   2
#define GC_DATAROTATE     3
#define GC_READMAP        4
#define GC_MODE           5
#define GC_MISCELLANEOUS  6
#define GC_COLORDONTCARE  7
#define GC_BITMASK        8
#define ATR_INDEX         0x3c0
#define ATR_MODE          16
#define ATR_OVERSCAN      17
#define ATR_COLORPLANEENABLE 18
#define ATR_PELPAN        19
#define ATR_COLORSELECT   20
#define STATUS_REGISTER_1 0x3da
#define PEL_WRITE_ADR     0x3c8
#define PEL_READ_ADR      0x3c7
#define PEL_DATA          0x3c9
#define SCREEN            0xa0000
#define SCREENWIDTH       320
#define SCREENHEIGHT      200


/**** VARIABLES ****/

#pragma noalign (pic_t)
typedef struct
{
 short width, height;
 short orgx, orgy;
 byte  data;
 } pic_t;

extern byte *screen;
extern byte *ylookup[SCREENHEIGHT];
extern byte *transparency;
extern byte *translookup[255];


/**** FUNCTIONS ****/

void VI_Init(int specialbuffer);
void VI_SetVGAMode(void);
void VI_SetTextMode(void);
void VI_WaitVBL(int vbls);
void VI_SetPalette(byte *pallete);
void VI_GetPalette(byte *pallete);
void VI_FillPalette(int red,int green,int blue);
void VI_SetColor(int color,int red,int green,int blue);
void VI_GetColor(int color,int *red,int *green,int *blue);
void VI_FadeOut (int start,int end,int red,int green,int blue,int steps);
void VI_FadeIn(int start,int end,byte *pallete,int steps);
void VI_ColorBorder(int color);
void VI_Plot(int x,int y,int color);
void VI_Hlin(int x,int y,int width,int color);
void VI_Vlin(int x,int y,int height,int color);
void VI_Bar(int x,int y,int width,int height,int color);
void VI_DrawPic(int x,int y,pic_t  *pic);
void VI_DrawMaskedPic(int x,int y,pic_t  *pic);
void VI_DrawMaskedPicToBuffer(int x,int y,pic_t *pic);
void VI_DrawMaskedPicToBuffer2(int x,int y,pic_t *pic);
void VI_DrawTransPicToBuffer(int x,int y,pic_t *pic);

#pragma aux VI_DrawMaskedPicToBuffer "*" parm [];


#endif