Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-22 16:31:49 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

gamekin3: Draw full area of screen using color filter and interpolation

Browse Source
This commit is contained in:
AJR 2019-11-07 08:59:15 -05:00
parent 03b5fcf623
commit a4cff66ddc
1 changed files with 81 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
src/mame/drivers/gameking.cpp
View File

@ -57,6 +57,7 @@ private:
TIMER_CALLBACK_MEMBER(gameking_timer2);
uint32_t screen_update_gameking(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
uint32_t screen_update_gameking3(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
DECLARE_DEVICE_IMAGE_LOAD_MEMBER(cart_load);
void gameking_mem(address_map &map);
@ -65,7 +66,7 @@ private:
required_device<cpu_device> m_maincpu;
required_device<generic_slot_device> m_cart;
required_ioport m_io_joy;
required_device<palette_device> m_palette;
optional_device<palette_device> m_palette;
emu_timer *timer1;
emu_timer *timer2;
@ -153,6 +154,76 @@ uint32_t gameking_state::screen_update_gameking(screen_device &screen, bitmap_in
}
static constexpr uint8_t gameking3_intensities[] =
{
0,
127,
191,
255
};
uint32_t gameking_state::screen_update_gameking3(screen_device& screen, bitmap_rgb32 &bitmap, const rectangle& cliprect)
{
address_space* maincpu_ram = &m_maincpu->space(AS_PROGRAM);
offs_t lssa = m_maincpu->state_int(st2xxx_device::ST_LSSA);
if (lssa < 0x0080)
return 0;
for (int y = 0, i = 0; i < 80; y += 2, i++)
{
for (int x = 0, j = 0; j < 40; x += 4, j++)
{
uint8_t data=maincpu_ram->read_byte(lssa+j+i*40);
// apply SPRD-C color filter
switch (i % 3)
{
case 0:
bitmap.pix32(y, x + 3) = rgb_t(0, gameking3_intensities[data&3], 0);
bitmap.pix32(y + 1, x + 2) = rgb_t(gameking3_intensities[(data>>2)&3], 0, 0);
bitmap.pix32(y, x + 1) = rgb_t(0, gameking3_intensities[(data>>4)&3], 0);
bitmap.pix32(y + 1, x) = rgb_t(gameking3_intensities[(data>>6)&3], 0, 0);
break;
case 1:
bitmap.pix32(y, x + 3) = rgb_t(0, 0, gameking3_intensities[data&3]);
bitmap.pix32(y + 1, x+2) = rgb_t(0, gameking3_intensities[(data>>2)&3], 0);
bitmap.pix32(y, x + 1) = rgb_t(0, 0, gameking3_intensities[(data>>4)&3]);
bitmap.pix32(y + 1, x) = rgb_t(0, gameking3_intensities[(data>>6)&3], 0);
break;
case 2:
bitmap.pix32(y, x + 3) = rgb_t(gameking3_intensities[data&3], 0, 0);
bitmap.pix32(y + 1, x+2) = rgb_t(0, 0, gameking3_intensities[(data>>2)&3]);
bitmap.pix32(y, x + 1) = rgb_t(gameking3_intensities[(data>>4)&3], 0, 0);
bitmap.pix32(y + 1, x) = rgb_t(0, 0, gameking3_intensities[(data>>6)&3]);
break;
}
}
}
// interpolate values for dots in between
for (int y = 0; y < 160; y++)
{
for (int x = y & 1; x < 160; x += 2)
{
rgb_t l = rgb_t(x == 0 ? 0 : bitmap.pix32(y, x - 1));
rgb_t r = rgb_t(x == 159 ? 0 : bitmap.pix32(y, x + 1));
rgb_t u = rgb_t(y == 0 ? 0 : bitmap.pix32(y - 1, x));
rgb_t d = rgb_t(y == 159 ? 0 : bitmap.pix32(y + 1, x));
bitmap.pix32(y, x) = rgb_t(
((u.r() + d.r()) * 2 + l.r() + r.r()) / 3,
((u.g() + d.g()) * 2 + l.g() + r.g()) / 3,
((u.b() + d.b()) * 2 + l.b() + r.b()) / 3
);
}
}
return 0;
}
void gameking_state::init_gameking()
{
timer1 = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(gameking_state::gameking_timer), this));
@ -235,6 +306,15 @@ void gameking_state::gameking3(machine_config &config)
{
gameking(config);
m_maincpu->set_addrmap(AS_DATA, &gameking_state::gameking3_mem);
screen_device &screen(*subdevice<screen_device>("screen"));
screen.set_size(160, 160);
screen.set_visarea_full();
screen.set_physical_aspect(3, 2);
screen.set_screen_update(FUNC(gameking_state::screen_update_gameking3));
screen.set_palette(finder_base::DUMMY_TAG);
config.device_remove("palette");
SOFTWARE_LIST(config, "cart_list").set_original("gameking");
SOFTWARE_LIST(config, "cart_list_3").set_original("gameking3");
}