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// license:BSD-3-Clause
// copyright-holders:David Haywood,Nicola Salmoria,Paul Priest
#include "emu.h"
#include "includes/pirates.h"
/* Video Hardware */
/* tilemaps */
TILE_GET_INFO_MEMBER(pirates_state::get_tx_tile_info)
{
int code = m_tx_tileram[tile_index*2];
int colr = m_tx_tileram[tile_index*2+1];
SET_TILE_INFO_MEMBER(0,code,colr,0);
}
TILE_GET_INFO_MEMBER(pirates_state::get_fg_tile_info)
{
int code = m_fg_tileram[tile_index*2];
int colr = m_fg_tileram[tile_index*2+1]+0x80;
SET_TILE_INFO_MEMBER(0,code,colr,0);
}
TILE_GET_INFO_MEMBER(pirates_state::get_bg_tile_info)
{
int code = m_bg_tileram[tile_index*2];
int colr = m_bg_tileram[tile_index*2+1]+ 0x100;
SET_TILE_INFO_MEMBER(0,code,colr,0);
}
/* video start / update */
void pirates_state::video_start()
{
m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(pirates_state::get_tx_tile_info),this),TILEMAP_SCAN_COLS,8,8,36,32);
/* Not sure how big they can be, Pirates uses only 32 columns, Genix 44 */
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(pirates_state::get_fg_tile_info),this),TILEMAP_SCAN_COLS,8,8,64,32);
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(pirates_state::get_bg_tile_info),this),TILEMAP_SCAN_COLS, 8,8,64,32);
m_tx_tilemap->set_transparent_pen(0);
m_fg_tilemap->set_transparent_pen(0);
}
WRITE16_MEMBER(pirates_state::tx_tileram_w)
{
COMBINE_DATA(m_tx_tileram+offset);
m_tx_tilemap->mark_tile_dirty(offset/2);
}
WRITE16_MEMBER(pirates_state::fg_tileram_w)
{
COMBINE_DATA(m_fg_tileram+offset);
m_fg_tilemap->mark_tile_dirty(offset/2);
}
WRITE16_MEMBER(pirates_state::bg_tileram_w)
{
COMBINE_DATA(m_bg_tileram+offset);
m_bg_tilemap->mark_tile_dirty(offset/2);
}
void pirates_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect)
{
gfx_element *gfx = m_gfxdecode->gfx(1);
uint16_t *source = m_spriteram + 4;
uint16_t *finish = source + 0x800/2-4;
while( source<finish )
{
int xpos, ypos, flipx, flipy, code, color;
xpos = source[1] - 32;
ypos = source[-1]; // indeed...
if (ypos & 0x8000) break; /* end-of-list marker */
code = source[2] >> 2;
color = source[0] & 0xff;
flipx = source[2] & 2;
flipy = source[2] & 1;
ypos = 0xf2 - ypos;
gfx->transpen(bitmap,cliprect,
code,
color,
flipx,flipy,
xpos,ypos,0);
source+=4;
}
}
uint32_t pirates_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->set_scrollx(0,m_scroll[0]);
m_fg_tilemap->set_scrollx(0,m_scroll[0]);
m_bg_tilemap->draw(screen, bitmap, cliprect, 0,0);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0,0);
draw_sprites(bitmap,cliprect);
m_tx_tilemap->draw(screen, bitmap, cliprect, 0,0);
return 0;
}
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