[picodrive.git] / Pico / cd / gfx_cd.c

// TODO...

#include "../PicoInt.h"

#define rot_comp Pico_mcd->rot_comp

static int Table_Rot_Time[] =
{
	0x00054000, 0x00048000, 0x00040000, 0x00036000,          //; 008-032               ; briefing - sprite
	0x0002E000, 0x00028000, 0x00024000, 0x00022000,          //; 036-064               ; arbre souvent
	0x00021000, 0x00020000, 0x0001E000, 0x0001B800,          //; 068-096               ; map thunderstrike
	0x00019800, 0x00017A00, 0x00015C00, 0x00013E00,          //; 100-128               ; logo défoncé

	0x00012000, 0x00011800, 0x00011000, 0x00010800,          //; 132-160               ; briefing - map
	0x00010000, 0x0000F800, 0x0000F000, 0x0000E800,          //; 164-192
	0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800,          //; 196-224
	0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800,          //; 228-256               ; batman visage

	0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00,          //; 260-288
	0x00009C00, 0x00009B00, 0x00009A00, 0x00009900,          //; 292-320
	0x00009800, 0x00009700, 0x00009600, 0x00009500,          //; 324-352
	0x00009400, 0x00009300, 0x00009200, 0x00009100,          //; 356-384

	0x00009000, 0x00008F00, 0x00008E00, 0x00008D00,          //; 388-416
	0x00008C00, 0x00008B00, 0x00008A00, 0x00008900,          //; 420-448
	0x00008800, 0x00008700, 0x00008600, 0x00008500,          //; 452-476
	0x00008400, 0x00008300, 0x00008200, 0x00008100,          //; 480-512
};


#if 1*0
typedef struct
{
	unsigned int Reg_58;	// Stamp_Size
	unsigned int Reg_5A;
	unsigned int Reg_5C;
	unsigned int Reg_5E;
	unsigned int Reg_60;
	unsigned int Reg_62;
	unsigned int Reg_64;	// V_Dot
	unsigned int Reg_66;

	unsigned int Stamp_Map_Adr;
	unsigned int Buffer_Adr;
	unsigned int Vector_Adr;
	unsigned int Jmp_Adr;
	unsigned int Float_Part;
	unsigned int Draw_Speed;

	unsigned int XS;
	unsigned int YS;
	unsigned int DXS;
	unsigned int DYS;
	unsigned int XD;
	unsigned int YD;
	unsigned int XD_Mul;
	unsigned int H_Dot;
} Rot_Comp;
#endif

static void gfx_cd_start(void)
{
	int upd_len;

	dprintf("gfx_cd_start()");

	upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
	upd_len = Table_Rot_Time[upd_len];

	rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;

	rot_comp.Reg_58 |= 0x8000;	// Stamp_Size,  we start a new GFX operation

	gfx_cd_update();
}


static void gfx_completed(void)
{
	rot_comp.Reg_58 &= 0x7fff;	// Stamp_Size
	rot_comp.Reg_64  = 0;
	if (Pico_mcd->s68k_regs[0x33] & (1<<1))
	{
		dprintf("gfx_cd irq 1");
		SekInterruptS68k(1);
	}
}


//static void gfx_do(void)
//{
//}


void gfx_cd_update(void)
{
	unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
	int jobs;

	dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);

	if (!*V_Dot)
	{
		// ...
		gfx_completed();
		return;
	}

	jobs = rot_comp.Float_Part >> 16;

	if (!jobs)
	{
		rot_comp.Float_Part += rot_comp.Draw_Speed;
		return;
	}

	rot_comp.Float_Part &= 0xffff;
	rot_comp.Float_Part += rot_comp.Draw_Speed;

	while (jobs--)
	{
		// jmp [Jmp_Adr]:
		(*V_Dot)--;	// dec byte [V_Dot]

		if (!*V_Dot)
		{
			// GFX_Completed:
			gfx_completed();
			return;
		}
	}
}


unsigned int gfx_cd_read(unsigned int a)
{
	unsigned int d = 0;

	switch (a) {
		case 0x58: d = rot_comp.Reg_58; break;
		case 0x5A: d = rot_comp.Reg_5A; break;
		case 0x5C: d = rot_comp.Reg_5C; break;
		case 0x5E: d = rot_comp.Reg_5E; break;
		case 0x60: d = rot_comp.Reg_60; break;
		case 0x62: d = rot_comp.Reg_62; break;
		case 0x64: d = rot_comp.Reg_64; break;
		case 0x66: break;
		default: dprintf("gfx_cd_read: unexpected address: %02x", a); break;
	}

	dprintf("gfx_cd_read(%02x) = %04x", a, d);

	return 0;
}

void gfx_cd_write(unsigned int a, unsigned int d)
{
	dprintf("gfx_cd_write(%x, %04x)", a, d);

	switch (a) {
		case 0x58: // .Reg_Stamp_Size
			rot_comp.Reg_58 = d & 7;
			return;

		case 0x5A: // .Reg_Stamp_Adr
			rot_comp.Reg_5A = d & 0xffe0;
			return;

		case 0x5C: // .Reg_IM_VCell_Size
			rot_comp.Reg_5C = d & 0x1f;
			return;

		case 0x5E: // .Reg_IM_Adr
			rot_comp.Reg_5E = d & 0xFFF8;
			return;

		case 0x60: // .Reg_IM_Offset
			rot_comp.Reg_60 = d & 0x3f;
			return;

		case 0x62: // .Reg_IM_HDot_Size
			rot_comp.Reg_62 = d & 0x1ff;
			return;

		case 0x64: // .Reg_IM_VDot_Size
			rot_comp.Reg_64 = d & 0xff;	// V_Dot, must be 32bit?
			return;

		case 0x66: // .Reg_Vector_Adr
			rot_comp.Reg_66 = d & 0xfffe;
			if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
			gfx_cd_start();
			return;

		default: dprintf("gfx_cd_write: unexpected address: %02x", a); return;
	}
}
Commit	Line	Data
cb4a513a	1	// TODO...
	2
	3	#include "../PicoInt.h"
	4
d1df8786	5	#define rot_comp Pico_mcd->rot_comp
	6
	7	static int Table_Rot_Time[] =
	8	{
	9	0x00054000, 0x00048000, 0x00040000, 0x00036000, //; 008-032 ; briefing - sprite
	10	0x0002E000, 0x00028000, 0x00024000, 0x00022000, //; 036-064 ; arbre souvent
	11	0x00021000, 0x00020000, 0x0001E000, 0x0001B800, //; 068-096 ; map thunderstrike
	12	0x00019800, 0x00017A00, 0x00015C00, 0x00013E00, //; 100-128 ; logo défoncé
	13
	14	0x00012000, 0x00011800, 0x00011000, 0x00010800, //; 132-160 ; briefing - map
	15	0x00010000, 0x0000F800, 0x0000F000, 0x0000E800, //; 164-192
	16	0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800, //; 196-224
	17	0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800, //; 228-256 ; batman visage
	18
	19	0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00, //; 260-288
	20	0x00009C00, 0x00009B00, 0x00009A00, 0x00009900, //; 292-320
	21	0x00009800, 0x00009700, 0x00009600, 0x00009500, //; 324-352
	22	0x00009400, 0x00009300, 0x00009200, 0x00009100, //; 356-384
	23
	24	0x00009000, 0x00008F00, 0x00008E00, 0x00008D00, //; 388-416
	25	0x00008C00, 0x00008B00, 0x00008A00, 0x00008900, //; 420-448
	26	0x00008800, 0x00008700, 0x00008600, 0x00008500, //; 452-476
	27	0x00008400, 0x00008300, 0x00008200, 0x00008100, //; 480-512
	28	};
	29
	30
	31	#if 1*0
	32	typedef struct
	33	{
	34	unsigned int Reg_58; // Stamp_Size
	35	unsigned int Reg_5A;
	36	unsigned int Reg_5C;
	37	unsigned int Reg_5E;
	38	unsigned int Reg_60;
	39	unsigned int Reg_62;
	40	unsigned int Reg_64; // V_Dot
	41	unsigned int Reg_66;
	42
	43	unsigned int Stamp_Map_Adr;
	44	unsigned int Buffer_Adr;
	45	unsigned int Vector_Adr;
	46	unsigned int Jmp_Adr;
	47	unsigned int Float_Part;
	48	unsigned int Draw_Speed;
	49
	50	unsigned int XS;
	51	unsigned int YS;
	52	unsigned int DXS;
	53	unsigned int DYS;
	54	unsigned int XD;
	55	unsigned int YD;
	56	unsigned int XD_Mul;
	57	unsigned int H_Dot;
	58	} Rot_Comp;
	59	#endif
cb4a513a	60
	61	static void gfx_cd_start(void)
	62	{
d1df8786	63	int upd_len;
	64
	65	dprintf("gfx_cd_start()");
	66
	67	upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
	68	upd_len = Table_Rot_Time[upd_len];
	69
	70	rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
	71
	72	rot_comp.Reg_58 \|= 0x8000; // Stamp_Size, we start a new GFX operation
	73
	74	gfx_cd_update();
	75	}
	76
	77
	78	static void gfx_completed(void)
	79	{
	80	rot_comp.Reg_58 &= 0x7fff; // Stamp_Size
	81	rot_comp.Reg_64 = 0;
cb4a513a	82	if (Pico_mcd->s68k_regs[0x33] & (1<<1))
	83	{
	84	dprintf("gfx_cd irq 1");
	85	SekInterruptS68k(1);
	86	}
	87	}
	88
d1df8786	89
	90	//static void gfx_do(void)
	91	//{
	92	//}
	93
	94
cb4a513a	95	void gfx_cd_update(void)
cb4a513a	96	{
d1df8786	97	unsigned char V_Dot = (unsigned char ) &rot_comp.Reg_64;
	98	int jobs;
	99
	100	dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
	101
	102	if (!*V_Dot)
	103	{
	104	// ...
	105	gfx_completed();
	106	return;
	107	}
	108
	109	jobs = rot_comp.Float_Part >> 16;
	110
	111	if (!jobs)
	112	{
	113	rot_comp.Float_Part += rot_comp.Draw_Speed;
	114	return;
	115	}
	116
	117	rot_comp.Float_Part &= 0xffff;
	118	rot_comp.Float_Part += rot_comp.Draw_Speed;
	119
	120	while (jobs--)
	121	{
	122	// jmp [Jmp_Adr]:
	123	(*V_Dot)--; // dec byte [V_Dot]
	124
	125	if (!*V_Dot)
	126	{
	127	// GFX_Completed:
	128	gfx_completed();
	129	return;
	130	}
	131	}
cb4a513a	132	}
	133
	134
	135	unsigned int gfx_cd_read(unsigned int a)
	136	{
d1df8786	137	unsigned int d = 0;
	138
	139	switch (a) {
	140	case 0x58: d = rot_comp.Reg_58; break;
	141	case 0x5A: d = rot_comp.Reg_5A; break;
	142	case 0x5C: d = rot_comp.Reg_5C; break;
	143	case 0x5E: d = rot_comp.Reg_5E; break;
	144	case 0x60: d = rot_comp.Reg_60; break;
	145	case 0x62: d = rot_comp.Reg_62; break;
	146	case 0x64: d = rot_comp.Reg_64; break;
	147	case 0x66: break;
	148	default: dprintf("gfx_cd_read: unexpected address: %02x", a); break;
	149	}
	150
	151	dprintf("gfx_cd_read(%02x) = %04x", a, d);
cb4a513a	152
cb4a513a	153	return 0;
	154	}
	155
	156	void gfx_cd_write(unsigned int a, unsigned int d)
	157	{
	158	dprintf("gfx_cd_write(%x, %04x)", a, d);
	159
	160	switch (a) {
d1df8786	161	case 0x58: // .Reg_Stamp_Size
	162	rot_comp.Reg_58 = d & 7;
	163	return;
	164
	165	case 0x5A: // .Reg_Stamp_Adr
	166	rot_comp.Reg_5A = d & 0xffe0;
	167	return;
	168
	169	case 0x5C: // .Reg_IM_VCell_Size
	170	rot_comp.Reg_5C = d & 0x1f;
	171	return;
	172
	173	case 0x5E: // .Reg_IM_Adr
	174	rot_comp.Reg_5E = d & 0xFFF8;
	175	return;
	176
	177	case 0x60: // .Reg_IM_Offset
	178	rot_comp.Reg_60 = d & 0x3f;
	179	return;
	180
	181	case 0x62: // .Reg_IM_HDot_Size
	182	rot_comp.Reg_62 = d & 0x1ff;
	183	return;
	184
	185	case 0x64: // .Reg_IM_VDot_Size
	186	rot_comp.Reg_64 = d & 0xff; // V_Dot, must be 32bit?
	187	return;
	188
	189	case 0x66: // .Reg_Vector_Adr
	190	rot_comp.Reg_66 = d & 0xfffe;
cb4a513a	191	if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
	192	gfx_cd_start();
	193	return;
d1df8786	194
d1df8786	195	default: dprintf("gfx_cd_write: unexpected address: %02x", a); return;
cb4a513a	196	}
	197	}
	198
d1df8786	199