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
|
/* Poke Champ */
#include "emu.h"
#include "includes/pokechmp.h"
WRITE8_HANDLER( pokechmp_videoram_w )
{
pokechmp_state *state = space->machine().driver_data<pokechmp_state>();
UINT8 *videoram = state->m_videoram;
videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset / 2);
}
WRITE8_HANDLER( pokechmp_flipscreen_w )
{
if (flip_screen_get(space->machine()) != (data & 0x80))
{
flip_screen_set(space->machine(), data & 0x80);
tilemap_mark_all_tiles_dirty_all(space->machine());
}
}
static TILE_GET_INFO( get_bg_tile_info )
{
pokechmp_state *state = machine.driver_data<pokechmp_state>();
UINT8 *videoram = state->m_videoram;
int code = videoram[tile_index*2+1] + ((videoram[tile_index*2] & 0x3f) << 8);
int color = videoram[tile_index*2] >> 6;
SET_TILE_INFO(0, code, color, 0);
}
VIDEO_START( pokechmp )
{
pokechmp_state *state = machine.driver_data<pokechmp_state>();
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows,
8, 8, 32, 32);
}
static void draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect)
{
pokechmp_state *state = machine.driver_data<pokechmp_state>();
UINT8 *spriteram = state->m_spriteram;
int offs;
for (offs = 0;offs < state->m_spriteram_size;offs += 4)
{
if (spriteram[offs] != 0xf8)
{
int sx,sy,flipx,flipy;
sx = 240 - spriteram[offs+2];
sy = 240 - spriteram[offs];
flipx = spriteram[offs+1] & 0x04;
flipy = spriteram[offs+1] & 0x02;
if (flip_screen_get(machine)) {
sx=240-sx;
sy=240-sy;
if (flipx) flipx=0; else flipx=1;
if (flipy) flipy=0; else flipy=1;
}
drawgfx_transpen(bitmap,cliprect,machine.gfx[1],
spriteram[offs+3] + ((spriteram[offs+1] & 1) << 8),
(spriteram[offs+1] & 0xf0) >> 4,
flipx,flipy,
sx,sy,0);
}
}
}
SCREEN_UPDATE( pokechmp )
{
pokechmp_state *state = screen->machine().driver_data<pokechmp_state>();
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
draw_sprites(screen->machine(), bitmap, cliprect);
return 0;
}
|