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// license:BSD-3-Clause
// copyright-holders:Phil Stroffolino, Stefan Jokisch
/***************************************************************************
Atari Ultra Tank video emulation
***************************************************************************/
#include "emu.h"
#include "includes/ultratnk.h"
#include "audio/sprint4.h"
void ultratnk_state::ultratnk_palette(palette_device &palette) const
{
const uint8_t *color_prom = memregion("proms")->base();
palette.set_indirect_color(0, rgb_t(0x00, 0x00, 0x00));
palette.set_indirect_color(1, rgb_t(0xa4, 0xa4, 0xa4));
palette.set_indirect_color(2, rgb_t(0x5b, 0x5b, 0x5b));
palette.set_indirect_color(3, rgb_t(0xff, 0xff, 0xff));
palette.set_pen_indirect(0, color_prom[0x00] & 3);
palette.set_pen_indirect(2, color_prom[0x00] & 3);
palette.set_pen_indirect(4, color_prom[0x00] & 3);
palette.set_pen_indirect(6, color_prom[0x00] & 3);
palette.set_pen_indirect(8, color_prom[0x00] & 3);
palette.set_pen_indirect(1, color_prom[0x01] & 3);
palette.set_pen_indirect(3, color_prom[0x02] & 3);
palette.set_pen_indirect(5, color_prom[0x04] & 3);
palette.set_pen_indirect(7, color_prom[0x08] & 3);
palette.set_pen_indirect(9, color_prom[0x10] & 3);
}
TILE_GET_INFO_MEMBER(ultratnk_state::tile_info)
{
uint8_t code = m_videoram[tile_index];
if (code & 0x20)
tileinfo.set(0, code, code >> 6, 0);
else
tileinfo.set(0, code, 4, 0);
}
void ultratnk_state::video_start()
{
m_screen->register_screen_bitmap(m_helper);
m_playfield = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(ultratnk_state::tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
std::fill(std::begin(m_collision), std::end(m_collision), 0);
}
uint32_t ultratnk_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_playfield->draw(screen, bitmap, cliprect, 0, 0);
for (int i = 0; i < 4; i++)
{
int bank = 0;
uint8_t horz = m_videoram[0x390 + 2 * i + 0];
uint8_t attr = m_videoram[0x390 + 2 * i + 1];
uint8_t vert = m_videoram[0x398 + 2 * i + 0];
uint8_t code = m_videoram[0x398 + 2 * i + 1];
if (code & 4)
bank = 32;
if (!(attr & 0x80))
{
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
(code >> 3) | bank,
i,
0, 0,
horz - 15,
vert - 15, 0);
}
}
return 0;
}
WRITE_LINE_MEMBER(ultratnk_state::screen_vblank)
{
// rising edge
if (state)
{
uint16_t BG = m_palette->pen_indirect(0);
/* check for sprite-playfield collisions */
for (int i = 0; i < 4; i++)
{
int bank = 0;
uint8_t horz = m_videoram[0x390 + 2 * i + 0];
uint8_t vert = m_videoram[0x398 + 2 * i + 0];
uint8_t code = m_videoram[0x398 + 2 * i + 1];
rectangle rect(
horz - 15,
horz - 15 + m_gfxdecode->gfx(1)->width() - 1,
vert - 15,
vert - 15 + m_gfxdecode->gfx(1)->height() - 1);
rect &= m_screen->visible_area();
m_playfield->draw(*m_screen, m_helper, rect, 0, 0);
if (code & 4)
bank = 32;
m_gfxdecode->gfx(1)->transpen(m_helper,rect,
(code >> 3) | bank,
4,
0, 0,
horz - 15,
vert - 15, 1);
for (int y = rect.top(); y <= rect.bottom(); y++)
for (int x = rect.left(); x <= rect.right(); x++)
if (m_palette->pen_indirect(m_helper.pix(y, x)) != BG)
m_collision[i] = 1;
}
/* update sound status */
m_discrete->write(ULTRATNK_MOTOR_DATA_1, m_videoram[0x391] & 15);
m_discrete->write(ULTRATNK_MOTOR_DATA_2, m_videoram[0x393] & 15);
}
}
void ultratnk_state::video_ram_w(offs_t offset, uint8_t data)
{
m_videoram[offset] = data;
m_playfield->mark_tile_dirty(offset);
}
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