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
|
// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
/***************************************************************************
Block Out
***************************************************************************/
#include "emu.h"
#include "includes/blockout.h"
void blockout_state::setcolor( int color, int rgb )
{
int bit0, bit1, bit2, bit3;
int r, g, b;
/* red component */
bit0 = (rgb >> 0) & 0x01;
bit1 = (rgb >> 1) & 0x01;
bit2 = (rgb >> 2) & 0x01;
bit3 = (rgb >> 3) & 0x01;
r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* green component */
bit0 = (rgb >> 4) & 0x01;
bit1 = (rgb >> 5) & 0x01;
bit2 = (rgb >> 6) & 0x01;
bit3 = (rgb >> 7) & 0x01;
g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* blue component */
bit0 = (rgb >> 8) & 0x01;
bit1 = (rgb >> 9) & 0x01;
bit2 = (rgb >> 10) & 0x01;
bit3 = (rgb >> 11) & 0x01;
b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
m_palette->set_pen_color(color, rgb_t(r,g,b));
}
WRITE16_MEMBER(blockout_state::blockout_paletteram_w)
{
COMBINE_DATA(&m_paletteram[offset]);
setcolor(offset, m_paletteram[offset]);
}
WRITE16_MEMBER(blockout_state::blockout_frontcolor_w)
{
COMBINE_DATA(&m_color);
setcolor(512, m_color);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
void blockout_state::video_start()
{
/* Allocate temporary bitmaps */
m_screen->register_screen_bitmap(m_tmpbitmap);
save_item(NAME(m_tmpbitmap));
}
void blockout_state::update_pixels( int x, int y )
{
uint16_t front, back;
int color;
const rectangle &visarea = m_screen->visible_area();
if (!visarea.contains(x, y))
return;
front = m_videoram[y * 256 + x / 2];
back = m_videoram[0x10000 + y * 256 + x / 2];
if (front >> 8)
color = front >> 8;
else
color = (back >> 8) + 256;
m_tmpbitmap.pix16(y, x) = color;
if (front & 0xff)
color = front & 0xff;
else
color = (back & 0xff) + 256;
m_tmpbitmap.pix16(y, x + 1) = color;
}
WRITE16_MEMBER(blockout_state::blockout_videoram_w)
{
COMBINE_DATA(&m_videoram[offset]);
update_pixels((offset % 256) * 2, (offset / 256) % 256);
}
uint32_t blockout_state::screen_update_blockout(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x, y;
pen_t color = 512;
copybitmap(bitmap, m_tmpbitmap, 0, 0, 0, 0, cliprect);
for (y = 0; y < 256; y++)
{
for (x = 0; x < 320; x += 8)
{
int d = m_frontvideoram[y * 64 + (x / 8)];
int xi;
for(xi=0;xi<8;xi++)
{
if(d & 1 << (7-xi))
bitmap.pix16(y, x + xi) = color;
}
}
}
return 0;
}
|