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Catacomb3D/ID_VW.H
Hans Kokx daaca5c6ef Initial commit
2026-03-12 19:22:23 +01:00

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/* Catacomb 3-D Source Code
* Copyright (C) 1993-2014 Flat Rock Software
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
// ID_VW.H
#ifndef __TYPES__
#include "ID_TYPES.H"
#endif
#ifndef __ID_MM__
#include "ID_MM.H"
#endif
#ifndef __ID_GLOB__
#include "ID_GLOB.H"
#endif
#define __ID_VW__
//===========================================================================
#define G_P_SHIFT 4 // global >> ?? = pixels
#if GRMODE == EGAGR
#define SCREENWIDTH 40
#define CHARWIDTH 1
#define TILEWIDTH 2
#define GRPLANES 4
#define BYTEPIXELS 8
#endif
#if GRMODE == CGAGR
#define SCREENWIDTH 128
#define CHARWIDTH 2
#define TILEWIDTH 4
#define GRPLANES 1
#define BYTEPIXELS 4
#endif
#define VIRTUALHEIGHT 300
#define VIRTUALWIDTH 512
#if GRMODE == CGAGR
#define MAXSHIFTS 1
#define WHITE 3 // graphics mode independant colors
#define BLACK 0
#define FIRSTCOLOR 1
#define SECONDCOLOR 2
#define F_WHITE 0 // for XOR font drawing
#define F_BLACK 3
#define F_FIRSTCOLOR 2
#define F_SECONDCOLOR 1
#endif
#if GRMODE == EGAGR
#define MAXSHIFTS 4
#define WHITE 15 // graphics mode independant colors
#define BLACK 0
#define FIRSTCOLOR 1
#define SECONDCOLOR 12
#define F_WHITE 0 // for XOR font drawing
#define F_BLACK 15
#define F_FIRSTCOLOR 14
#define F_SECONDCOLOR 3
#endif
#if GRMODE == EGAGR
#define SCREENXMASK (~7)
#define SCREENXPLUS (7)
#define SCREENXDIV (8)
#endif
#if GRMODE == CGAGR
#define SCREENXMASK (~3)
#define SCREENXDIV (4)
#endif
//===========================================================================
#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
//===========================================================================
typedef enum {NOcard,MDAcard,CGAcard,EGAcard,MCGAcard,VGAcard,
HGCcard=0x80,HGCPcard,HICcard} cardtype;
typedef struct
{
int width,
height,
orgx,orgy,
xl,yl,xh,yh,
shifts;
} spritetabletype;
typedef struct
{
unsigned sourceoffset[MAXSHIFTS];
unsigned planesize[MAXSHIFTS];
unsigned width[MAXSHIFTS];
byte data[];
} spritetype; // the memptr for each sprite points to this
typedef struct
{
int width,height;
} pictabletype;
typedef struct
{
int height;
int location[256];
char width[256];
} fontstruct;
typedef enum {CGAgr,EGAgr,VGAgr} grtype;
//===========================================================================
extern cardtype videocard; // set by VW_Startup
extern grtype grmode; // CGAgr, EGAgr, VGAgr
extern unsigned bufferofs; // hidden port to draw to before displaying
extern unsigned displayofs; // origin of port on visable screen
extern unsigned panx,pany; // panning adjustments inside port in pixels
extern unsigned pansx,pansy;
extern unsigned panadjust; // panx/pany adjusted by screen resolution
extern unsigned screenseg; // normally 0xa000 or buffer segment
extern unsigned linewidth;
extern unsigned ylookup[VIRTUALHEIGHT];
extern boolean screenfaded;
extern char colors[7][17]; // pallets for fades
extern pictabletype _seg *pictable;
extern pictabletype _seg *picmtable;
extern spritetabletype _seg *spritetable;
extern unsigned fontnumber; // 0 based font number for drawing
extern int px,py;
extern byte pdrawmode,fontcolor;
extern int bordercolor;
//
// asm globals
//
extern unsigned *shifttabletable[8];
extern unsigned bufferwidth,bufferheight,screenspot; // used by font drawing stuff
//===========================================================================
void VW_Startup (void);
void VW_Shutdown (void);
cardtype VW_VideoID (void);
//
// EGA hardware routines
//
#define EGAWRITEMODE(x) asm{cli;mov dx,GC_INDEX;mov ax,GC_MODE+256*x;out dx,ax;sti;}
#define EGABITMASK(x) asm{cli;mov dx,GC_INDEX;mov ax,GC_BITMASK+256*x;out dx,ax;sti;}
#define EGAMAPMASK(x) asm{cli;mov dx,SC_INDEX;mov ax,SC_MAPMASK+x*256;out dx,ax;sti;}
#define EGAREADMAP(x) asm{cli;mov dx,GC_INDEX;mov ax,GC_READMAP+x*256;out dx,ax;sti;}
void VW_SetLineWidth(int width);
void VW_SetSplitScreen(int width);
void VW_SetScreen (unsigned CRTC, unsigned pelpan);
void VW_SetScreenMode (int grmode);
void VW_ClearVideo (int color);
void VW_WaitVBL (int number);
void VW_ColorBorder (int color);
void VW_SetPalette(byte *palette);
void VW_SetDefaultColors(void);
void VW_FadeOut(void);
void VW_FadeIn(void);
void VW_FadeUp(void);
void VW_FadeDown(void);
void VW_SetAtrReg (int reg, int value);
//
// block primitives
//
void VW_MaskBlock(memptr segm,unsigned ofs,unsigned dest,
unsigned wide,unsigned height,unsigned planesize);
void VW_MemToScreen(memptr source,unsigned dest,unsigned width,unsigned height);
void VW_ScreenToMem(unsigned source,memptr dest,unsigned width,unsigned height);
void VW_ScreenToScreen(unsigned source,unsigned dest,unsigned width,unsigned height);
//
// block addressable routines
//
void VW_DrawTile8(unsigned x, unsigned y, unsigned tile);
#if GRMODE == EGAGR
#define VW_DrawTile8M(x,y,t) \
VW_MaskBlock(grsegs[STARTTILE8M],(t)*40,bufferofs+ylookup[y]+(x),1,8,8)
#define VW_DrawTile16(x,y,t) \
VW_MemToScreen(grsegs[STARTTILE16+t],bufferofs+ylookup[y]+(x),2,16)
#define VW_DrawTile16M(x,y,t) \
VW_MaskBlock(grsegs[STARTTILE16M],(t)*160,bufferofs+ylookup[y]+(x),2,16,32)
#endif
#if GRMODE == CGAGR
#define VW_DrawTile8M(x,y,t) \
VW_MaskBlock(grsegs[STARTTILE8M],(t)*32,bufferofs+ylookup[y]+(x),2,8,16)
#define VW_DrawTile16(x,y,t) \
VW_MemToScreen(grsegs[STARTTILE16+t],bufferofs+ylookup[y]+(x),4,16)
#define VW_DrawTile16M(x,y,t) \
VW_MaskBlock(grsegs[STARTTILE16M],(t)*128,bufferofs+ylookup[y]+(x),4,16,64)
#endif
void VW_DrawPic(unsigned x, unsigned y, unsigned chunknum);
void VW_DrawMPic(unsigned x, unsigned y, unsigned chunknum);
void VW_ClipDrawMPic(unsigned x, int y, unsigned chunknum);
//
// pixel addressable routines
//
void VW_MeasurePropString (char far *string, word *width, word *height);
void VW_MeasureMPropString (char far *string, word *width, word *height);
void VW_DrawPropString (char far *string);
void VW_DrawMPropString (char far *string);
void VW_DrawSprite(int x, int y, unsigned sprite);
void VW_Plot(unsigned x, unsigned y, unsigned color);
void VW_Hlin(unsigned xl, unsigned xh, unsigned y, unsigned color);
void VW_Vlin(unsigned yl, unsigned yh, unsigned x, unsigned color);
void VW_Bar (unsigned x, unsigned y, unsigned width, unsigned height,
unsigned color);
//===========================================================================
//
// Double buffer management routines
//
void VW_InitDoubleBuffer (void);
void VW_FixRefreshBuffer (void);
int VW_MarkUpdateBlock (int x1, int y1, int x2, int y2);
void VW_UpdateScreen (void);
void VW_CGAFullUpdate (void);
//
// cursor
//
void VW_ShowCursor (void);
void VW_HideCursor (void);
void VW_MoveCursor (int x, int y);
void VW_SetCursor (int spritenum);
void VW_FreeCursor (void);
//
// mode independant routines
// coordinates in pixels, rounded to best screen res
// regions marked in double buffer
//
void VWB_DrawTile8 (int x, int y, int tile);
void VWB_DrawTile8M (int x, int y, int tile);
void VWB_DrawTile16 (int x, int y, int tile);
void VWB_DrawTile16M (int x, int y, int tile);
void VWB_DrawPic (int x, int y, int chunknum);
void VWB_DrawMPic(int x, int y, int chunknum);
void VWB_Bar (int x, int y, int width, int height, int color);
void VWB_DrawPropString (char far *string);
void VWB_DrawMPropString (char far *string);
void VWB_DrawSprite (int x, int y, int chunknum);
void VWB_Plot (int x, int y, int color);
void VWB_Hlin (int x1, int x2, int y, int color);
void VWB_Vlin (int y1, int y2, int x, int color);
//===========================================================================
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