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
|
#include "driver.h"
#include "video/taitoic.h"
static tilemap *fg_tilemap;
UINT16 *darius_fg_ram;
struct tempsprite
{
int gfx;
int code,color;
int flipx,flipy;
int x,y;
int zoomx,zoomy;
int primask;
};
static struct tempsprite *spritelist;
/***************************************************************************/
INLINE void actual_get_fg_tile_info(running_machine *machine, tile_data *tileinfo, int tile_index, UINT16 *ram,int gfxnum)
{
UINT16 code = (ram[tile_index + 0x2000] & 0x7ff);
UINT16 attr = ram[tile_index];
SET_TILE_INFO(
gfxnum,
code,
((attr & 0xff) << 2),
TILE_FLIPYX((attr & 0xc000) >> 14));
}
static TILE_GET_INFO( get_fg_tile_info )
{
actual_get_fg_tile_info(machine, tileinfo, tile_index, darius_fg_ram, 2);
}
/***************************************************************************/
VIDEO_START( darius )
{
fg_tilemap = tilemap_create(machine, get_fg_tile_info,tilemap_scan_rows,8,8,128,64);
spritelist = auto_alloc_array(machine, struct tempsprite, 0x800);
/* (chips, gfxnum, x_offs, y_offs, y_invert, opaque, dblwidth) */
PC080SN_vh_start(machine,1,1,-16,8,0,1,1);
tilemap_set_transparent_pen(fg_tilemap,0);
}
/***************************************************************************/
WRITE16_HANDLER( darius_fg_layer_w )
{
COMBINE_DATA(&darius_fg_ram[offset]);
if (offset < 0x4000)
tilemap_mark_tile_dirty(fg_tilemap,(offset & 0x1fff));
}
/***************************************************************************/
static void draw_sprites(running_machine *machine, bitmap_t *bitmap,const rectangle *cliprect,int primask, int x_offs, int y_offs)
{
int offs,curx,cury;
UINT16 code,data,sx,sy;
UINT8 flipx,flipy,color,priority;
/* pdrawgfx() needs us to draw sprites front to back, so we have to build a list
while processing sprite ram and then draw them all at the end */
struct tempsprite *sprite_ptr = spritelist;
for (offs = spriteram_size/2-4; offs >= 0; offs -= 4)
{
code = spriteram16[offs+2] &0x1fff;
if (code)
{
data = spriteram16[offs];
sy = (256-data) & 0x1ff;
data = spriteram16[offs+1];
sx = data & 0x3ff;
data = spriteram16[offs+2];
flipx = ((data & 0x4000) >> 14);
flipy = ((data & 0x8000) >> 15);
data = spriteram16[offs+3];
priority = (data &0x80) >> 7; // 0 = low
if (priority != primask) continue;
color = (data & 0x7f);
curx = sx - x_offs;
cury = sy + y_offs;
if (curx > 900) curx -= 1024;
if (cury > 400) cury -= 512;
sprite_ptr->code = code;
sprite_ptr->color = color;
sprite_ptr->flipx = flipx;
sprite_ptr->flipy = flipy;
sprite_ptr->x = curx;
sprite_ptr->y = cury;
drawgfx(bitmap,machine->gfx[0],
sprite_ptr->code,
sprite_ptr->color,
sprite_ptr->flipx,sprite_ptr->flipy,
sprite_ptr->x,sprite_ptr->y,
cliprect,TRANSPARENCY_PEN,0);
}
}
}
VIDEO_UPDATE( darius )
{
int xoffs = 0;
const device_config *left_screen = devtag_get_device(screen->machine, "lscreen");
const device_config *middle_screen = devtag_get_device(screen->machine, "mscreen");
const device_config *right_screen = devtag_get_device(screen->machine, "rscreen");
if (screen == left_screen)
xoffs = 36*8*0;
else if (screen == middle_screen)
xoffs = 36*8*1;
else if (screen == right_screen)
xoffs = 36*8*2;
PC080SN_tilemap_update();
// draw bottom layer(always active)
PC080SN_tilemap_draw_offset(bitmap,cliprect,0,0,TILEMAP_DRAW_OPAQUE,0,-xoffs,0);
/* Sprites can be under/over the layer below text layer */
draw_sprites(screen->machine,bitmap,cliprect,0,xoffs,-8); // draw sprites with priority 0 which are under the mid layer
// draw middle layer
PC080SN_tilemap_draw_offset(bitmap,cliprect,0,1,0,0,-xoffs,0);
draw_sprites(screen->machine,bitmap,cliprect,1,xoffs,-8); // draw sprites with priority 1 which are over the mid layer
/* top(text) layer is in fixed position */
tilemap_set_scrollx(fg_tilemap,0,0+xoffs);
tilemap_set_scrolly(fg_tilemap,0,-8);
tilemap_draw(bitmap,cliprect,fg_tilemap,0,0);
return 0;
}
|