// license:BSD-3-Clause
// copyright-holders:Ernesto Corvi
#include "emu.h"
#include "includes/wc90.h"
/***************************************************************************
Callbacks for the TileMap code
***************************************************************************/
TILE_GET_INFO_MEMBER(wc90_state::get_bg_tile_info)
{
int attr = m_bgvideoram[tile_index];
int tile = m_bgvideoram[tile_index + 0x800] +
256 * ((attr & 3) + ((attr >> 1) & 4));
SET_TILE_INFO_MEMBER(2,
tile,
attr >> 4,
0);
}
TILE_GET_INFO_MEMBER(wc90_state::get_fg_tile_info)
{
int attr = m_fgvideoram[tile_index];
int tile = m_fgvideoram[tile_index + 0x800] +
256 * ((attr & 3) + ((attr >> 1) & 4));
SET_TILE_INFO_MEMBER(1,
tile,
attr >> 4,
0);
}
TILE_GET_INFO_MEMBER(wc90_state::get_tx_tile_info)
{
SET_TILE_INFO_MEMBER(0,
m_txvideoram[tile_index + 0x800] + ((m_txvideoram[tile_index] & 0x07) << 8),
m_txvideoram[tile_index] >> 4,
0);
}
TILE_GET_INFO_MEMBER(wc90_state::track_get_bg_tile_info)
{
int attr = m_bgvideoram[tile_index];
int tile = m_bgvideoram[tile_index + 0x800] +
256 * (attr & 7);
SET_TILE_INFO_MEMBER(2,
tile,
attr >> 4,
0);
}
TILE_GET_INFO_MEMBER(wc90_state::track_get_fg_tile_info)
{
int attr = m_fgvideoram[tile_index];
int tile = m_fgvideoram[tile_index + 0x800] +
256 * (attr & 7);
SET_TILE_INFO_MEMBER(1,
tile,
attr >> 4,
0);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
void wc90_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(wc90_state::get_bg_tile_info),this),TILEMAP_SCAN_ROWS, 16,16,64,32);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(wc90_state::get_fg_tile_info),this),TILEMAP_SCAN_ROWS,16,16,64,32);
m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(wc90_state::get_tx_tile_info),this),TILEMAP_SCAN_ROWS, 8, 8,64,32);
m_fg_tilemap->set_transparent_pen(0);
m_tx_tilemap->set_transparent_pen(0);
}
VIDEO_START_MEMBER(wc90_state,wc90t)
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(wc90_state::track_get_bg_tile_info),this),TILEMAP_SCAN_ROWS, 16,16,64,32);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(wc90_state::track_get_fg_tile_info),this),TILEMAP_SCAN_ROWS,16,16,64,32);
m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(wc90_state::get_tx_tile_info),this),TILEMAP_SCAN_ROWS, 8, 8,64,32);
m_fg_tilemap->set_transparent_pen(0);
m_tx_tilemap->set_transparent_pen(0);
}
/***************************************************************************
Memory handlers
***************************************************************************/
WRITE8_MEMBER(wc90_state::bgvideoram_w)
{
m_bgvideoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset & 0x7ff);
}
WRITE8_MEMBER(wc90_state::fgvideoram_w)
{
m_fgvideoram[offset] = data;
m_fg_tilemap->mark_tile_dirty(offset & 0x7ff);
}
WRITE8_MEMBER(wc90_state::txvideoram_w)
{
m_txvideoram[offset] = data;
m_tx_tilemap->mark_tile_dirty(offset & 0x7ff);
}
/***************************************************************************
Display refresh
***************************************************************************/
uint32_t wc90_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->set_scrollx(0,m_scroll2xlo[0] + 256 * m_scroll2xhi[0]);
m_bg_tilemap->set_scrolly(0,m_scroll2ylo[0] + 256 * m_scroll2yhi[0]);
m_fg_tilemap->set_scrollx(0,m_scroll1xlo[0] + 256 * m_scroll1xhi[0]);
m_fg_tilemap->set_scrolly(0,m_scroll1ylo[0] + 256 * m_scroll1yhi[0]);
m_tx_tilemap->set_scrollx(0,m_scroll0xlo[0] + 256 * m_scroll0xhi[0]);
m_tx_tilemap->set_scrolly(0,m_scroll0ylo[0] + 256 * m_scroll0yhi[0]);
// m_sprgen->draw_sprites(bitmap,cliprect, m_gfxdecode, m_spriteram, m_spriteram.bytes(), 3); // unused
m_bg_tilemap->draw(screen, bitmap, cliprect, 0,0);
m_sprgen->draw_wc90_sprites(bitmap,cliprect, m_gfxdecode, m_spriteram, m_spriteram.bytes(), 2);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0,0);
m_sprgen->draw_wc90_sprites(bitmap,cliprect, m_gfxdecode, m_spriteram, m_spriteram.bytes(), 1);
m_tx_tilemap->draw(screen, bitmap, cliprect, 0,0);
m_sprgen->draw_wc90_sprites(bitmap,cliprect, m_gfxdecode, m_spriteram, m_spriteram.bytes(), 0);
return 0;
}