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// license:BSD-3-Clause
// copyright-holders:Bryan McPhail
/***************************************************************************
Dark Seal Video emulation - Bryan McPhail, mish@tendril.co.uk
****************************************************************************
uses 2x DECO55 tilemaps
**************************************************************************
Sprite/Tilemap Priority Note (is this implemented?)
Word 4:
Mask 0x8000 - ?
Mask 0x4000 - Sprite is drawn beneath top 8 pens of playfield 4
Mask 0x3e00 - Colour (32 palettes, most games only use 16)
Mask 0x01ff - X coordinate
***************************************************************************/
#include "emu.h"
#include "includes/darkseal.h"
/***************************************************************************/
/******************************************************************************/
void darkseal_state::update_palette(int offset)
{
int r,g,b;
// TODO : Values aren't write in game when higher than 0xf0,
// It's related from hardware colour resistors?
r = (m_paletteram[offset] >> 0) & 0xff;
g = (m_paletteram[offset] >> 8) & 0xff;
b = (m_paletteram_ext[offset] >> 0) & 0xff;
m_palette->set_pen_color(offset,rgb_t(r,g,b));
}
void darkseal_state::palette_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
COMBINE_DATA(&m_paletteram[offset]);
update_palette(offset);
}
void darkseal_state::palette_ext_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
COMBINE_DATA(&m_paletteram_ext[offset]);
update_palette(offset);
}
/******************************************************************************/
uint32_t darkseal_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
uint16_t flip = m_deco_tilegen[1]->pf_control_r(0);
flip_screen_set(!BIT(flip, 7));
m_sprgen->set_flip_screen(!BIT(flip, 7));
bitmap.fill(m_palette->black_pen(), cliprect);
m_deco_tilegen[0]->pf_update(m_pf1_rowscroll, m_pf1_rowscroll);
m_deco_tilegen[1]->pf_update(m_pf3_rowscroll, m_pf3_rowscroll);
m_deco_tilegen[1]->tilemap_1_draw(screen, bitmap, cliprect, 0, 0);
m_deco_tilegen[1]->tilemap_2_draw(screen, bitmap, cliprect, 0, 0);
m_deco_tilegen[0]->tilemap_1_draw(screen, bitmap, cliprect, 0, 0);
m_sprgen->draw_sprites(bitmap, cliprect, m_spriteram->buffer(), 0x400);
m_deco_tilegen[0]->tilemap_2_draw(screen, bitmap, cliprect, 0, 0);
return 0;
}
/******************************************************************************/
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