// license:BSD-3-Clause
// copyright-holders:David Haywood
/* Aquarium */
#include "emu.h"
#include "includes/aquarium.h"
/* TXT Layer */
TILE_GET_INFO_MEMBER(aquarium_state::get_aquarium_txt_tile_info)
{
int tileno, colour;
tileno = (m_txt_videoram[tile_index] & 0x0fff);
colour = (m_txt_videoram[tile_index] & 0xf000) >> 12;
SET_TILE_INFO_MEMBER(2, tileno, colour, 0);
tileinfo.category = (m_txt_videoram[tile_index] & 0x8000) >> 15;
}
WRITE16_MEMBER(aquarium_state::aquarium_txt_videoram_w)
{
COMBINE_DATA(&m_txt_videoram[offset]);
m_txt_tilemap->mark_tile_dirty(offset);
}
/* MID Layer */
TILE_GET_INFO_MEMBER(aquarium_state::get_aquarium_mid_tile_info)
{
int tileno, colour, flag;
tileno = (m_mid_videoram[tile_index * 2] & 0x0fff);
colour = (m_mid_videoram[tile_index * 2 + 1] & 0x001f);
flag = TILE_FLIPYX((m_mid_videoram[tile_index * 2 + 1] & 0x300) >> 8);
SET_TILE_INFO_MEMBER(1, tileno, colour, flag);
tileinfo.category = (m_mid_videoram[tile_index * 2 + 1] & 0x20) >> 5;
}
WRITE16_MEMBER(aquarium_state::aquarium_mid_videoram_w)
{
COMBINE_DATA(&m_mid_videoram[offset]);
m_mid_tilemap->mark_tile_dirty(offset / 2);
}
/* BAK Layer */
TILE_GET_INFO_MEMBER(aquarium_state::get_aquarium_bak_tile_info)
{
int tileno, colour, flag;
tileno = (m_bak_videoram[tile_index * 2] & 0x0fff);
colour = (m_bak_videoram[tile_index * 2 + 1] & 0x001f);
flag = TILE_FLIPYX((m_bak_videoram[tile_index * 2 + 1] & 0x300) >> 8);
SET_TILE_INFO_MEMBER(3, tileno, colour, flag);
tileinfo.category = (m_bak_videoram[tile_index * 2 + 1] & 0x20) >> 5;
}
WRITE16_MEMBER(aquarium_state::aquarium_bak_videoram_w)
{
COMBINE_DATA(&m_bak_videoram[offset]);
m_bak_tilemap->mark_tile_dirty(offset / 2);
}
void aquarium_state::video_start()
{
m_txt_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(aquarium_state::get_aquarium_txt_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 64, 64);
m_bak_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(aquarium_state::get_aquarium_bak_tile_info),this), TILEMAP_SCAN_ROWS, 16, 16, 32, 32);
m_mid_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(aquarium_state::get_aquarium_mid_tile_info),this), TILEMAP_SCAN_ROWS, 16, 16, 32, 32);
m_txt_tilemap->set_transparent_pen(0);
m_mid_tilemap->set_transparent_pen(0);
m_bak_tilemap->set_transparent_pen(0);
m_screen->register_screen_bitmap(m_temp_sprite_bitmap);
}
void aquarium_state::mix_sprite_bitmap(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int priority_mask, int priority_value)
{
for (int y = cliprect.min_y;y <= cliprect.max_y;y++)
{
uint16_t* srcline = &m_temp_sprite_bitmap.pix16(y);
uint16_t* dstline = &bitmap.pix16(y);
for (int x = cliprect.min_x;x <= cliprect.max_x;x++)
{
uint16_t pixel = srcline[x];
if (pixel & 0xf)
if ((pixel & priority_mask) == priority_value)
dstline[x] = pixel;
}
}
}
uint32_t aquarium_state::screen_update_aquarium(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_mid_tilemap->set_scrollx(0, m_scroll[0]);
m_mid_tilemap->set_scrolly(0, m_scroll[1]);
m_bak_tilemap->set_scrollx(0, m_scroll[2]);
m_bak_tilemap->set_scrolly(0, m_scroll[3]);
m_txt_tilemap->set_scrollx(0, m_scroll[4]);
m_txt_tilemap->set_scrolly(0, m_scroll[5]);
bitmap.fill(0, cliprect); // WDUD logo suggests this
m_temp_sprite_bitmap.fill(0, cliprect);
m_sprgen->aquarium_draw_sprites(m_temp_sprite_bitmap, cliprect, m_gfxdecode, 16);
m_bak_tilemap->draw(screen, bitmap, cliprect, 0, 0);
mix_sprite_bitmap(screen, bitmap, cliprect, 0x80, 0x80);
m_mid_tilemap->draw(screen, bitmap, cliprect, 0, 0);
m_txt_tilemap->draw(screen, bitmap, cliprect, 1, 0);
m_bak_tilemap->draw(screen, bitmap, cliprect, 1, 0);
mix_sprite_bitmap(screen, bitmap, cliprect, 0x80, 0x00);
m_mid_tilemap->draw(screen, bitmap, cliprect, 1, 0);
m_txt_tilemap->draw(screen, bitmap, cliprect, 0, 0);
return 0;
}