scummvm/engines/cge/vga13h.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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.
 *
 */

/*
 * This code is based on original Soltys source code
 * Copyright (c) 1994-1995 Janus B. Wisniewski and L.K. Avalon
 */

#ifndef __VGA13H__
#define __VGA13H__

#include "cge/general.h"
#include <stddef.h>
#include "cge/bitmap.h"
#include "cge/snail.h"

namespace CGE {

#define TMR_RATE1   16
#define TMR_RATE2   4
#define TMR_RATE   (TMR_RATE1 * TMR_RATE2)

#define MAX_NAME    20
#define VIDEO       0x10

#define NO_CLEAR    0x80
#define TEXT_MODE   0x03
#define M13H        0x13

#ifndef SCR_WID
#define SCR_WID     320
#endif

#ifndef SCR_HIG
#define SCR_HIG     200
#endif


#if 0
#define LIGHT       0xFF
#define DARK        0x00
#define DGRAY       0xF6
#define GRAY        0xFC
#define LGRAY       0xFF
#else
#define LIGHT       0xFF
#define DARK        207
#define DGRAY       225 /*219*/
#define GRAY        231
#define LGRAY       237
#endif

#define NO_SEQ      (-1)
#define NO_PTR      ((uint8)-1)

#define SPR_EXT     ".SPR"

#define IsFile(s)   (access(s, 0) == 0)
#define IsWrit(s)   (access(s, 2) == 0)



typedef struct {
	uint16 r : 2;
	uint16 R : 6;
	uint16 g : 2;
	uint16 G : 6;
	uint16 b : 2;
	uint16 B : 6;
} RGB;

typedef union {
	DAC dac;
	RGB rgb;
} TRGB;

typedef struct {
	uint8 idx, adr;
	uint8 clr, set;
} VgaRegBlk;

typedef struct {
	uint8 Now, Next;
	signed char Dx, Dy;
	int Dly;
} SEQ;

extern  SEQ Seq1[];
extern  SEQ Seq2[];
//extern    SEQ *   Compass[];
//extern    SEQ TurnToS[];


#define PAL_CNT  256
#define PAL_SIZ (PAL_CNT * sizeof(DAC))
#define VGAATR_ 0x3C0
#define VGAMIw_ 0x3C0
#define VGASEQ_ 0x3C4
#define VGAMIr_ 0x3CC
#define VGAGRA_ 0x3CE
#define VGACRT_ 0x3D4
#define VGAST1_ 0x3DA
#define VGAATR  (VGAATR_ & 0xFF)
#define VGAMIw  (VGAMIw_ & 0xFF)
#define VGASEQ  (VGASEQ_ & 0xFF)
#define VGAMIr  (VGAMIr_ & 0xFF)
#define VGAGRA  (VGAGRA_ & 0xFF)
#define VGACRT  (VGACRT_ & 0xFF)
#define VGAST1  (VGAST1_ & 0xFF)


class HEART : public ENGINE {
	friend ENGINE;
public:
	static bool Enable;
	static uint16 *XTimer;
	static void SetXTimer(uint16 *ptr);
	static void SetXTimer(uint16 *ptr, uint16 time);
	HEART(void);
};


class SPREXT {
public:
	int x0, y0;
	int x1, y1;
	BMP_PTR b0, b1;
	BMP_PTR *ShpList;
	SEQ *Seq;
	char *Name;
	SNAIL::COM *Near, * Take;
	SPREXT(void) :
		x0(0), y0(0),
		x1(0), y1(0),
		b0(NULL), b1(NULL),
		ShpList(NULL), Seq(NULL),
		Name(NULL), Near(NULL), Take(NULL)
	{}
};


class SPRITE {
protected:
	SPREXT *Ext;
public:
	int Ref;
	signed char Cave;
	struct FLAGS {
		uint16 Hide : 1;       // general visibility switch
		uint16 Near : 1;       // Near action lock
		uint16 Drag : 1;       // sprite is moveable
		uint16 Hold : 1;       // sprite is held with mouse
		uint16 ____ : 1;       // intrrupt driven animation
		uint16 Slav : 1;       // slave object
		uint16 Syst : 1;       // system object
		uint16 Kill : 1;       // dispose memory after remove
		uint16 Xlat : 1;       // 2nd way display: xlat table
		uint16 Port : 1;       // portable
		uint16 Kept : 1;       // kept in pocket
		uint16 East : 1;       // talk to east (in opposite to west)
		uint16 Shad : 1;       // shadow
		uint16 Back : 1;       // 'send to background' request
		uint16 BDel : 1;       // delete bitmaps in ~SPRITE
		uint16 Tran : 1;       // transparent (untouchable)
	} Flags;
	int X, Y;
	signed char Z;
	uint16 W, H;
	uint16 Time;
	uint8 NearPtr, TakePtr;
	int SeqPtr;
	int ShpCnt;
	char File[MAXFILE];
	SPRITE *Prev, * Next;
	bool Works(SPRITE *spr);
	bool SeqTest(int n);
	inline bool Active(void) {
		return Ext != NULL;
	}
	SPRITE(BMP_PTR *shp);
	virtual ~SPRITE(void);
	BMP_PTR Shp(void);
	BMP_PTR *SetShapeList(BMP_PTR *shp);
	void MoveShapes(uint8 *buf);
	SPRITE *Expand(void);
	SPRITE *Contract(void);
	SPRITE *BackShow(bool fast = false);
	void SetName(char *n);
	inline char *Name(void) {
		return (Ext) ? Ext->Name : NULL;
	}
	void Goto(int x, int y);
	void Center(void);
	void Show(void);
	void Hide(void);
	BMP_PTR Ghost(void);
	void Show(uint16 pg);
	void MakeXlat(uint8 *x);
	void KillXlat(void);
	void Step(int nr = -1);
	SEQ *SetSeq(SEQ *seq);
	SNAIL::COM *SnList(SNLIST type);
	virtual void Touch(uint16 mask, int x, int y);
	virtual void Tick(void);
};


class QUEUE {
	SPRITE *Head, * Tail;
public:
	bool Show;
	QUEUE(bool show = false);
	~QUEUE(void);
	void Append(SPRITE *spr);
	void Insert(SPRITE *spr, SPRITE *nxt);
	void Insert(SPRITE *spr);
	SPRITE *Remove(SPRITE *spr);
	void ForAll(void (*fun)(SPRITE *));
	SPRITE *First(void) {
		return Head;
	}
	SPRITE *Last(void) {
		return Tail;
	}
	SPRITE *Locate(int ref);
	void Clear(void);
};


class VGA {
	static uint16 OldMode;
	static uint16 *OldScreen;
	static uint16 StatAdr;
	static bool SetPal;
	static DAC *OldColors, * NewColors;
	static int SetMode(int mode);
	static void UpdateColors(void);
	static void SetColors(void);
	static const char *Msg;
	static const char *Nam;
	static void SetStatAdr(void);
	static void WaitVR(bool on = true);
public:
	uint32 FrmCnt;
	static QUEUE ShowQ, SpareQ;
	static int Mono;
	static uint8 *Page[4];
	VGA(int mode = M13H);
	~VGA(void);
	void Setup(VgaRegBlk *vrb);
	static void GetColors(DAC *tab);
	static void SetColors(DAC *tab, int lum);
	static void Clear(uint8 color = 0);
	static void CopyPage(uint16 d, uint16 s = 3);
	static void Sunrise(DAC *tab);
	static void Sunset(void);
	void Show(void);
	void Update(void);
};


DAC     MkDAC(uint8 r, uint8 g, uint8 b);
RGB     MkRGB(uint8 r, uint8 g, uint8 b);


template <class CBLK>
uint8 Closest(CBLK *pal, CBLK x) {
#define f(col, lum) ((((uint16)(col)) << 8) / lum)
	uint16 i, dif = 0xFFFF, found = 0;
	uint16 L = x.R + x.G + x.B;
	if (!L) 
		++L;
	uint16 R = f(x.R, L), G = f(x.G, L), B = f(x.B, L);
	for (i = 0; i < 256; i ++) {
		uint16 l = pal[i].R + pal[i].G + pal[i].B;
		if (! l) 
			++l;
		int  r = f(pal[i].R, l), g = f(pal[i].G, l), b = f(pal[i].B, l);
		uint16 D = ((r > R) ? (r - R) : (R - r)) +
		           ((g > G) ? (g - G) : (G - g)) +
		           ((b > B) ? (b - B) : (B - b)) +
		           ((l > L) ? (l - L) : (L - l)) * 10 ;

		if (D < dif) {
			found = i;
			dif = D;
			if (D == 0) 
				break;    // exact!
		}
	}
	return found;
#undef f
};







char       *NumStr(char *str, int num);
//static void       Video       (void);
uint16     *SaveScreen(void);
void        RestoreScreen(uint16 * &sav);
SPRITE     *SpriteAt(int x, int y);
SPRITE     *Locate(int ref);

extern      bool        SpeedTest;

} // End if namespace CGE

#endif