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// license:BSD-3-Clause
// copyright-holders:Tomasz Slanina
/***************************************************************************
ladyfrog.cpp
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/ladyfrog.h"
void ladyfrog_state::ladyfrog_spriteram_w(offs_t offset, uint8_t data)
{
m_spriteram[offset] = data;
}
uint8_t ladyfrog_state::ladyfrog_spriteram_r(offs_t offset)
{
return m_spriteram[offset];
}
TILE_GET_INFO_MEMBER(ladyfrog_state::get_tile_info)
{
int pal = m_videoram[tile_index * 2 + 1] & 0x0f;
int tile = m_videoram[tile_index * 2] + ((m_videoram[tile_index * 2 + 1] & 0xc0) << 2)+ ((m_videoram[tile_index * 2 + 1] & 0x30) << 6);
tileinfo.set(0,
tile + 0x1000 * m_tilebank,
pal,TILE_FLIPY
);
}
void ladyfrog_state::ladyfrog_videoram_w(offs_t offset, uint8_t data)
{
m_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset >> 1);
}
uint8_t ladyfrog_state::ladyfrog_videoram_r(offs_t offset)
{
return m_videoram[offset];
}
void ladyfrog_state::ladyfrog_palette_w(offs_t offset, uint8_t data)
{
if (offset & 0x100)
m_palette->write8_ext((offset & 0xff) + (m_palette_bank << 8), data);
else
m_palette->write8((offset & 0xff) + (m_palette_bank << 8), data);
}
uint8_t ladyfrog_state::ladyfrog_palette_r(offs_t offset)
{
if (offset & 0x100)
return m_paletteram_ext[(offset & 0xff) + (m_palette_bank << 8)];
else
return m_paletteram[(offset & 0xff) + (m_palette_bank << 8)];
}
void ladyfrog_state::ladyfrog_gfxctrl_w(uint8_t data)
{
m_palette_bank = (data & 0x20) >> 5;
}
void ladyfrog_state::ladyfrog_gfxctrl2_w(uint8_t data)
{
m_tilebank = ((data & 0x18) >> 3) ^ 3;
m_bg_tilemap->mark_all_dirty();
}
uint8_t ladyfrog_state::ladyfrog_scrlram_r(offs_t offset)
{
return m_scrlram[offset];
}
void ladyfrog_state::ladyfrog_scrlram_w(offs_t offset, uint8_t data)
{
m_scrlram[offset] = data;
m_bg_tilemap->set_scrolly(offset, data);
}
void ladyfrog_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect )
{
int i;
for (i = 0; i < 0x20; i++)
{
int pr = m_spriteram[0x9f - i];
int offs = (pr & 0x1f) * 4;
{
int code, sx, sy, flipx, flipy, pal;
code = m_spriteram[offs + 2] + ((m_spriteram[offs + 1] & 0x10) << 4) + m_spritetilebase;
pal = m_spriteram[offs + 1] & 0x0f;
sx = m_spriteram[offs + 3];
sy = 238 - m_spriteram[offs + 0];
flipx = ((m_spriteram[offs + 1] & 0x40)>>6);
flipy = ((m_spriteram[offs + 1] & 0x80)>>7);
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
code,
pal,
flipx,flipy,
sx,sy,15);
if (m_spriteram[offs + 3] > 240)
{
sx = (m_spriteram[offs + 3] - 256);
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
code,
pal,
flipx,flipy,
sx,sy,15);
}
}
}
}
VIDEO_START_MEMBER(ladyfrog_state,ladyfrog_common)
{
m_spriteram = std::make_unique<uint8_t[]>(160);
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(ladyfrog_state::get_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
m_paletteram.resize(0x200);
m_paletteram_ext.resize(0x200);
m_palette->basemem().set(m_paletteram, ENDIANNESS_LITTLE, 1);
m_palette->extmem().set(m_paletteram_ext, ENDIANNESS_LITTLE, 1);
m_bg_tilemap->set_scroll_cols(32);
m_bg_tilemap->set_scrolldy(15, 15);
save_pointer(NAME(m_spriteram), 160);
save_item(NAME(m_paletteram));
save_item(NAME(m_paletteram_ext));
}
void ladyfrog_state::video_start()
{
// weird, there are sprite tiles at 0x000 and 0x400, but they don't contain all the sprites!
m_spritetilebase = 0x800;
VIDEO_START_CALL_MEMBER(ladyfrog_common);
}
VIDEO_START_MEMBER(ladyfrog_state,toucheme)
{
m_spritetilebase = 0x000;
VIDEO_START_CALL_MEMBER(ladyfrog_common);
}
uint32_t ladyfrog_state::screen_update_ladyfrog(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
draw_sprites(bitmap, cliprect);
return 0;
}
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