// license:BSD-3-Clause
// copyright-holders:Tomasz Slanina
/***************************************************************************
Mustache Boy
(c)1987 March Electronics
***************************************************************************/
#include "emu.h"
#include "includes/mustache.h"
WRITE8_MEMBER(mustache_state::videoram_w)
{
m_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset / 2);
}
WRITE8_MEMBER(mustache_state::video_control_w)
{
/* It is assumed that screen flipping is controlled by both
hardware (via a DIP switch, labeled "Hard SW" on the
operator's sheet) and software, as in some Irem games */
flip_screen_set((data & 0x01) ^ BIT(~m_dswb->read(), 7));
/* tile bank */
if ((m_control_byte ^ data) & 0x08)
{
m_control_byte = data;
machine().tilemap().mark_all_dirty();
}
}
WRITE8_MEMBER(mustache_state::scroll_w)
{
m_bg_tilemap->set_scrollx(0, 0x100 - data);
m_bg_tilemap->set_scrollx(1, 0x100 - data);
m_bg_tilemap->set_scrollx(2, 0x100 - data);
m_bg_tilemap->set_scrollx(3, 0x100);
}
TILE_GET_INFO_MEMBER(mustache_state::get_bg_tile_info)
{
int attr = m_videoram[2 * tile_index + 1];
int code = m_videoram[2 * tile_index] + ((attr & 0x60) << 3) + ((m_control_byte & 0x08) << 7);
int color = attr & 0x0f;
SET_TILE_INFO_MEMBER(0, code, color, ((attr & 0x10) ? TILE_FLIPX : 0) | ((attr & 0x80) ? TILE_FLIPY : 0) );
}
void mustache_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(mustache_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS_FLIP_X,
8, 8, 64, 32);
m_bg_tilemap->set_scroll_rows(4);
save_item(NAME(m_control_byte));
}
void mustache_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect )
{
rectangle clip = cliprect;
gfx_element *gfx = m_gfxdecode->gfx(1);
const rectangle &visarea = m_screen->visible_area();
int offs;
for (offs = 0;offs < m_spriteram.bytes();offs += 4)
{
int sy = 240-m_spriteram[offs];
int sx = 240-m_spriteram[offs+3];
int code = m_spriteram[offs+2];
int attr = m_spriteram[offs+1];
int color = (attr & 0xe0)>>5;
if (sy == 240) continue;
code+=(attr&0x0c)<<6;
if ((m_control_byte & 0xa))
clip.max_y = visarea.max_y;
else
if (flip_screen())
clip.min_y = visarea.min_y + 56;
else
clip.max_y = visarea.max_y - 56;
if (flip_screen())
{
sx = 240 - sx;
sy = 232 - sy;
}
gfx->transpen(bitmap,clip,
code,
color,
flip_screen(),flip_screen(),
sx,sy,0);
}
}
uint32_t mustache_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
draw_sprites(bitmap, cliprect);
return 0;
}