summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/video/taito_o.cpp
blob: 513a251e5d460b71f2fb79b092a44bad4a0b8ebc (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
// license:BSD-3-Clause
// copyright-holders:Tomasz Slanina
/***************************************************************************

Based on taito_h.c

***************************************************************************/

#include "emu.h"
#include "includes/taito_o.h"


/* These are hand-tuned values */
static const int zoomy_conv_table[] =
{
/*    +0   +1   +2   +3   +4   +5   +6   +7    +8   +9   +a   +b   +c   +d   +e   +f */
	0x00,0x01,0x01,0x02,0x02,0x03,0x04,0x05, 0x06,0x06,0x07,0x08,0x09,0x0a,0x0a,0x0b,   /* 0x00 */
	0x0b,0x0c,0x0c,0x0d,0x0e,0x0e,0x0f,0x10, 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x16,
	0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e, 0x1f,0x20,0x21,0x22,0x24,0x25,0x26,0x27,
	0x28,0x2a,0x2b,0x2c,0x2e,0x30,0x31,0x32, 0x34,0x36,0x37,0x38,0x3a,0x3c,0x3e,0x3f,

	0x40,0x41,0x42,0x42,0x43,0x43,0x44,0x44, 0x45,0x45,0x46,0x46,0x47,0x47,0x48,0x49,   /* 0x40 */
	0x4a,0x4a,0x4b,0x4b,0x4c,0x4d,0x4e,0x4f, 0x4f,0x50,0x51,0x51,0x52,0x53,0x54,0x55,
	0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d, 0x5e,0x5f,0x60,0x61,0x62,0x63,0x64,0x66,
	0x67,0x68,0x6a,0x6b,0x6c,0x6e,0x6f,0x71, 0x72,0x74,0x76,0x78,0x80,0x7b,0x7d,0x7f
};


void taitoo_state::parentj_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect, int priority )
{
	/* Y chain size is 16/32?/64/64? pixels. X chain size
	   is always 64 pixels. */

	static const int size[] = { 1, 2, 4, 4 };
	int x0, y0, x, y, dx, dy, ex, ey, zx, zy;
	int ysize;
	int j, k;
	int offs;                   /* sprite RAM offset */
	int tile_offs;              /* sprite chain offset */
	int zoomx, zoomy;           /* zoom value */

	for (offs = 0x03f8 / 2; offs >= 0; offs -= 0x008 / 2)
	{
		if (offs <  0x01b0 && priority == 0)    continue;
		if (offs >= 0x01b0 && priority == 1)    continue;

		x0        =  m_tc0080vco->sprram_r(offs + 1) & 0x3ff;
		y0        =  m_tc0080vco->sprram_r(offs + 0) & 0x3ff;
		zoomx     = (m_tc0080vco->sprram_r(offs + 2) & 0x7f00) >> 8;
		zoomy     = (m_tc0080vco->sprram_r(offs + 2) & 0x007f);
		tile_offs = (m_tc0080vco->sprram_r(offs + 3) & 0x1fff) << 2;
		ysize     = size[(m_tc0080vco->sprram_r(offs) & 0x0c00) >> 10];

		if (tile_offs)
		{
			/* Convert zoomy value to real value as zoomx */
			zoomy = zoomy_conv_table[zoomy];

			if (zoomx < 63)
			{
				dx = 8 + (zoomx + 2) / 8;
				ex = (zoomx + 2) % 8;
				zx = ((dx << 1) + ex) << 11;
			}
			else
			{
				dx = 16 + (zoomx - 63) / 4;
				ex = (zoomx - 63) % 4;
				zx = (dx + ex) << 12;
			}

			if (zoomy < 63)
			{
				dy = 8 + (zoomy + 2) / 8;
				ey = (zoomy + 2) % 8;
				zy = ((dy << 1) + ey) << 11;
			}
			else
			{
				dy = 16 + (zoomy - 63) / 4;
				ey = (zoomy - 63) % 4;
				zy = (dy + ey) << 12;
			}

			if (x0 >= 0x200) x0 -= 0x400;
			if (y0 >= 0x200) y0 -= 0x400;

			if (m_tc0080vco->flipscreen_r())
			{
				x0 = 497 - x0;
				y0 = 498 - y0;
				dx = -dx;
				dy = -dy;
			}
			else
			{
				x0 += 1;
				y0 += 2;
			}

			y = y0;
			for (j = 0; j < ysize; j ++)
			{
				x = x0;
				for (k = 0; k < 4; k ++)
				{
					if (tile_offs >= 0x1000)
					{
						int tile, color, flipx, flipy;

						tile  = m_tc0080vco->cram_0_r(tile_offs) & 0x7fff;
						color = m_tc0080vco->cram_1_r(tile_offs) & 0x001f;
						flipx = m_tc0080vco->cram_1_r(tile_offs) & 0x0040;
						flipy = m_tc0080vco->cram_1_r(tile_offs) & 0x0080;

						if (m_tc0080vco->flipscreen_r())
						{
							flipx ^= 0x0040;
							flipy ^= 0x0080;
						}


									m_gfxdecode->gfx(0)->zoom_transpen(bitmap,cliprect,
									tile,
									color,
									flipx, flipy,
									x, y,
									zx, zy, 0
						);
					}
					tile_offs ++;
					x += dx;
				}
				y += dy;
			}
		}
	}
}


uint32_t taitoo_state::screen_update_parentj(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	m_tc0080vco->tilemap_update();

	bitmap.fill(0, cliprect);

	m_tc0080vco->tilemap_draw(screen, bitmap, cliprect, 0, TILEMAP_DRAW_OPAQUE, 0);

	parentj_draw_sprites(bitmap, cliprect, 0);
	parentj_draw_sprites(bitmap, cliprect, 1);

	m_tc0080vco->tilemap_draw(screen, bitmap, cliprect, 1, 0, 0);
	m_tc0080vco->tilemap_draw(screen, bitmap, cliprect, 2, 0, 0);

	return 0;
}