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
|
// license:BSD-3-Clause
// copyright-holders:Zsolt Vasvari
/***************************************************************************
video.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/hanaawas.h"
/***************************************************************************
Convert the color PROMs into a more useable format.
***************************************************************************/
void hanaawas_state::hanaawas_palette(palette_device &palette) const
{
uint8_t const *color_prom = memregion("proms")->base();
// create a lookup table for the palette
for (int i = 0; i < 0x10; i++)
{
int bit0, bit1, bit2;
/* red component */
bit0 = BIT(color_prom[i], 0);
bit1 = BIT(color_prom[i], 1);
bit2 = BIT(color_prom[i], 2);
int const r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = BIT(color_prom[i], 3);
bit1 = BIT(color_prom[i], 4);
bit2 = BIT(color_prom[i], 5);
int const g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = 0;
bit1 = BIT(color_prom[i], 6);
bit2 = BIT(color_prom[i], 7);
int const b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette.set_indirect_color(i, rgb_t(r, g, b));
}
// color_prom now points to the beginning of the lookup table
color_prom += 0x20;
// character lookup table. The 1bpp tiles really only use colors 0-0x0f and the 3bpp ones 0x10-0x1f
for (int i = 0; i < 0x100; i++)
{
int const swapped_i = bitswap<8>(i, 2,7,6,5,4,3,1,0);
uint8_t const ctabentry = color_prom[swapped_i] & 0x0f;
palette.set_pen_indirect(i, ctabentry);
}
}
WRITE8_MEMBER(hanaawas_state::hanaawas_videoram_w)
{
m_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
WRITE8_MEMBER(hanaawas_state::hanaawas_colorram_w)
{
m_colorram[offset] = data;
/* dirty both current and next offsets */
m_bg_tilemap->mark_tile_dirty(offset);
m_bg_tilemap->mark_tile_dirty((offset + (flip_screen() ? -1 : 1)) & 0x03ff);
}
WRITE8_MEMBER(hanaawas_state::hanaawas_portB_w)
{
/* bit 7 is flip screen */
if (flip_screen() != (~data & 0x80))
{
flip_screen_set(~data & 0x80);
machine().tilemap().mark_all_dirty();
}
}
TILE_GET_INFO_MEMBER(hanaawas_state::get_bg_tile_info)
{
/* the color is determined by the current color byte, but the bank is via the previous one!!! */
int offset = (tile_index + (flip_screen() ? 1 : -1)) & 0x3ff;
int attr = m_colorram[offset];
int gfxbank = (attr & 0x40) >> 6;
int code = m_videoram[tile_index] + ((attr & 0x20) << 3);
int color = m_colorram[tile_index] & 0x1f;
tileinfo.set(gfxbank, code, color, 0);
}
void hanaawas_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(hanaawas_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
}
uint32_t hanaawas_state::screen_update_hanaawas(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
return 0;
}
|