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// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
#include "emu.h"
#include "includes/gotcha.h"
/***************************************************************************
Callbacks for the TileMap code
***************************************************************************/
TILEMAP_MAPPER_MEMBER(gotcha_state::tilemap_scan)
{
return (col & 0x1f) | (row << 5) | ((col & 0x20) << 5);
}
inline void gotcha_state::get_tile_info( tile_data &tileinfo, int tile_index ,uint16_t *vram, int color_offs)
{
uint16_t data = vram[tile_index];
int code = (data & 0x3ff) | (m_gfxbank[(data & 0x0c00) >> 10] << 10);
tileinfo.set(0, code, (data >> 12) + color_offs, 0);
}
TILE_GET_INFO_MEMBER(gotcha_state::fg_get_tile_info)
{
get_tile_info(tileinfo, tile_index, m_fgvideoram, 0);
}
TILE_GET_INFO_MEMBER(gotcha_state::bg_get_tile_info)
{
get_tile_info(tileinfo, tile_index, m_bgvideoram, 16);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
void gotcha_state::video_start()
{
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(gotcha_state::fg_get_tile_info)), tilemap_mapper_delegate(*this, FUNC(gotcha_state::tilemap_scan)), 16, 16, 64, 32);
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(gotcha_state::bg_get_tile_info)), tilemap_mapper_delegate(*this, FUNC(gotcha_state::tilemap_scan)), 16, 16, 64, 32);
m_fg_tilemap->set_transparent_pen(0);
m_fg_tilemap->set_scrolldx(-1, 0);
m_bg_tilemap->set_scrolldx(-5, 0);
}
void gotcha_state::fgvideoram_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
COMBINE_DATA(&m_fgvideoram[offset]);
m_fg_tilemap->mark_tile_dirty(offset);
}
void gotcha_state::bgvideoram_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
COMBINE_DATA(&m_bgvideoram[offset]);
m_bg_tilemap->mark_tile_dirty(offset);
}
void gotcha_state::gfxbank_select_w(uint8_t data)
{
m_banksel = data & 0x03;
}
void gotcha_state::gfxbank_w(uint8_t data)
{
if (m_gfxbank[m_banksel] != (data & 0x0f))
{
m_gfxbank[m_banksel] = data & 0x0f;
machine().tilemap().mark_all_dirty();
}
}
void gotcha_state::scroll_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
COMBINE_DATA(&m_scroll[offset]);
switch (offset)
{
case 0: m_fg_tilemap->set_scrollx(0, m_scroll[0]); break;
case 1: m_fg_tilemap->set_scrolly(0, m_scroll[1]); break;
case 2: m_bg_tilemap->set_scrollx(0, m_scroll[2]); break;
case 3: m_bg_tilemap->set_scrolly(0, m_scroll[3]); break;
}
}
uint32_t gotcha_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect);
m_fg_tilemap->draw(screen, bitmap, cliprect);
m_sprgen->draw_sprites(bitmap, cliprect, m_spriteram, 0x400);
return 0;
}
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