// license:BSD-3-Clause
// copyright-holders:David Haywood, Paul Priest
/* One Shot One Kill Video Hardware */
#include "emu.h"
#include "includes/oneshot.h"
/* bg tilemap */
TILE_GET_INFO_MEMBER(oneshot_state::get_bg_tile_info)
{
const u32 tileno = m_bg_videoram[tile_index * 2 + 1];
SET_TILE_INFO_MEMBER(0, tileno, 0, 0);
}
void oneshot_state::bg_videoram_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_bg_videoram[offset]);
m_bg_tilemap->mark_tile_dirty(offset / 2);
}
/* mid tilemap */
TILE_GET_INFO_MEMBER(oneshot_state::get_mid_tile_info)
{
const u32 tileno = m_mid_videoram[tile_index * 2 + 1];
SET_TILE_INFO_MEMBER(0, tileno, 2, 0);
}
void oneshot_state::mid_videoram_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_mid_videoram[offset]);
m_mid_tilemap->mark_tile_dirty(offset / 2);
}
/* fg tilemap */
TILE_GET_INFO_MEMBER(oneshot_state::get_fg_tile_info)
{
const u32 tileno = m_fg_videoram[tile_index * 2 + 1];
SET_TILE_INFO_MEMBER(0, tileno, 3, 0);
}
void oneshot_state::fg_videoram_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_fg_videoram[offset]);
m_fg_tilemap->mark_tile_dirty(offset / 2);
}
void oneshot_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(oneshot_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 16, 16, 32, 32);
m_mid_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(oneshot_state::get_mid_tile_info)), TILEMAP_SCAN_ROWS, 16, 16, 32, 32);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(oneshot_state::get_fg_tile_info)), TILEMAP_SCAN_ROWS, 16, 16, 32, 32);
m_bg_tilemap->set_transparent_pen(0);
m_mid_tilemap->set_transparent_pen(0);
m_fg_tilemap->set_transparent_pen(0);
}
void oneshot_state::draw_crosshairs()
{
//int xpos,ypos;
/* get gun raw coordinates (player 1) */
m_gun_x_p1 = (m_io_lightgun_x[0]->read() & 0xff) * 320 / 256;
m_gun_y_p1 = (m_io_lightgun_y[0]->read() & 0xff) * 240 / 256;
/* compute the coordinates for drawing (from routine at 0x009ab0) */
//xpos = m_gun_x_p1;
//ypos = m_gun_y_p1;
m_gun_x_p1 += m_gun_x_shift;
m_gun_y_p1 -= 0x0a;
if (m_gun_y_p1 < 0)
m_gun_y_p1 = 0;
/* get gun raw coordinates (player 2) */
m_gun_x_p2 = (m_io_lightgun_x[1]->read() & 0xff) * 320 / 256;
m_gun_y_p2 = (m_io_lightgun_y[1]->read() & 0xff) * 240 / 256;
/* compute the coordinates for drawing (from routine at 0x009b6e) */
//xpos = m_gun_x_p2;
//ypos = m_gun_y_p2;
m_gun_x_p2 += m_gun_x_shift - 0x0a;
if (m_gun_x_p2 < 0)
m_gun_x_p2 = 0;
}
void oneshot_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect)
{
const u16 *source = m_spriteram;
const u16 *finish = source + (0x1000 / 2);
gfx_element *gfx = m_gfxdecode->gfx(1);
while (source < finish)
{
const u16 attr = source[0];
if (attr & 0x0001) // end of sprites
break;
if (!(attr & 0x8000)) // visible bit
{
source += 0x4;
continue;
}
const u32 num = source[1] & 0xffff;
const int xsize = (source[2] & 0x000f) + 1;
const int ysize = (source[3] & 0x000f) + 1;
int ypos = source[3] & 0xff80;
int xpos = source[2] & 0xff80;
ypos = ypos >> 7;
xpos = xpos >> 7;
xpos -= 8;
ypos -= 6;
for (int blockx = 0; blockx < xsize; blockx++)
{
for (int blocky = 0; blocky < ysize; blocky++)
{
gfx->transpen(
bitmap,
cliprect,
num + (blocky * xsize) + blockx,
1,
0,0,
xpos + blockx * 8, ypos + blocky * 8, 0);
gfx->transpen(
bitmap,
cliprect,
num + (blocky * xsize) + blockx,
1,
0,0,
xpos + blockx * 8 - 0x200, ypos + blocky * 8, 0);
}
}
source += 0x4;
}
}
u32 oneshot_state::screen_update_oneshot(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
bitmap.fill(m_palette->black_pen(), cliprect);
m_mid_tilemap->set_scrollx(0, m_scroll[0] - 0x1f5);
m_mid_tilemap->set_scrolly(0, m_scroll[1]);
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
m_mid_tilemap->draw(screen, bitmap, cliprect, 0, 0);
draw_sprites(bitmap, cliprect);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
draw_crosshairs();
return 0;
}
u32 oneshot_state::screen_update_maddonna(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
bitmap.fill(m_palette->black_pen(), cliprect);
m_mid_tilemap->set_scrolly(0, m_scroll[1]); // other registers aren't used so we don't know which layers they relate to
m_mid_tilemap->draw(screen, bitmap, cliprect, 0, 0);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
draw_sprites(bitmap, cliprect);
// popmessage ("%04x %04x %04x %04x %04x %04x %04x %04x", m_scroll[0], m_scroll[1], m_scroll[2], m_scroll[3], m_scroll[4], m_scroll[5], m_scroll[6], m_scroll[7]);
return 0;
}
// why are the layers in a different order?
u32 oneshot_state::screen_update_komocomo(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
bitmap.fill(m_palette->black_pen(), cliprect);
m_mid_tilemap->set_scrolly(0, m_scroll[1]); // other registers aren't used so we don't know which layers they relate to
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
m_mid_tilemap->draw(screen, bitmap, cliprect, 0, 0);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
draw_sprites(bitmap, cliprect);
// popmessage ("%04x %04x %04x %04x %04x %04x %04x %04x", m_scroll[0], m_scroll[1], m_scroll[2], m_scroll[3], m_scroll[4], m_scroll[5], m_scroll[6], m_scroll[7]);
return 0;
}