// license:BSD-3-Clause
// copyright-holders:Nicola Salmoria
#include "emu.h"
#include "includes/deniam.h"
#include "screen.h"
void deniam_state::deniam_common_init( )
{
m_bg_scrollx_reg = 0x00a4/2;
m_bg_scrolly_reg = 0x00a8/2;
m_bg_page_reg = 0x00ac/2;
m_fg_scrollx_reg = 0x00a2/2;
m_fg_scrolly_reg = 0x00a6/2;
m_fg_page_reg = 0x00aa/2;
m_display_enable = 0;
m_coinctrl = 0;
for (int i = 0; i < 4; i++)
{
m_bg_page[i] = 0;
m_fg_page[i] = 0;
}
}
void deniam_state::init_logicpro()
{
deniam_common_init();
m_bg_scrollx_offs = 0x00d;
m_bg_scrolly_offs = 0x000;
m_fg_scrollx_offs = 0x009;
m_fg_scrolly_offs = 0x000;
}
void deniam_state::init_karianx()
{
deniam_common_init();
m_bg_scrollx_offs = 0x10d;
m_bg_scrolly_offs = 0x080;
m_fg_scrollx_offs = 0x109;
m_fg_scrolly_offs = 0x080;
}
/***************************************************************************
Callbacks for the TileMap code
***************************************************************************/
TILEMAP_MAPPER_MEMBER(deniam_state::scan_pages)
{
/* logical (col,row) -> memory offset */
return (col & 0x3f) + ((row & 0x1f) << 6) + ((col & 0x40) << 5) + ((row & 0x20) << 7);
}
TILE_GET_INFO_MEMBER(deniam_state::get_bg_tile_info)
{
const int page = tile_index >> 11;
u16 attr = m_videoram[m_bg_page[page] * 0x0800 + (tile_index & 0x7ff)];
SET_TILE_INFO_MEMBER(0,
attr,
(attr & 0x1fc0) >> 6,
0);
}
TILE_GET_INFO_MEMBER(deniam_state::get_fg_tile_info)
{
const int page = tile_index >> 11;
u16 attr = m_videoram[m_fg_page[page] * 0x0800 + (tile_index & 0x7ff)];
SET_TILE_INFO_MEMBER(0,
attr,
(attr & 0x1fc0) >> 6,
0);
}
TILE_GET_INFO_MEMBER(deniam_state::get_tx_tile_info)
{
u16 attr = m_textram[tile_index];
SET_TILE_INFO_MEMBER(0,
attr & 0xf1ff,
(attr & 0x0e00) >> 9,
0);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
void deniam_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(deniam_state::get_bg_tile_info)), tilemap_mapper_delegate(*this, FUNC(deniam_state::scan_pages)), 8, 8, 128, 64);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(deniam_state::get_fg_tile_info)), tilemap_mapper_delegate(*this, FUNC(deniam_state::scan_pages)), 8, 8, 128, 64);
m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(deniam_state::get_tx_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 64, 32);
m_fg_tilemap->set_transparent_pen(0);
m_tx_tilemap->set_transparent_pen(0);
}
/***************************************************************************
Memory handlers
***************************************************************************/
void deniam_state::videoram_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_videoram[offset]);
const int page = offset >> 11;
for (int i = 0; i < 4; i++)
{
if (m_bg_page[i] == page)
m_bg_tilemap->mark_tile_dirty(i * 0x800 + (offset & 0x7ff));
if (m_fg_page[i] == page)
m_fg_tilemap->mark_tile_dirty(i * 0x800 + (offset & 0x7ff));
}
}
void deniam_state::textram_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_textram[offset]);
m_tx_tilemap->mark_tile_dirty(offset);
}
u16 deniam_state::coinctrl_r()
{
return m_coinctrl;
}
void deniam_state::coinctrl_w(offs_t offset, u16 data, u16 mem_mask)
{
COMBINE_DATA(&m_coinctrl);
/* bit 0 is coin counter */
machine().bookkeeping().coin_counter_w(0, m_coinctrl & 0x01);
/* bit 6 is display enable (0 freezes screen) */
m_display_enable = m_coinctrl & 0x20;
/* other bits unknown (unused?) */
}
/***************************************************************************
Display refresh
***************************************************************************/
/*
* Sprite Format
* ------------------
*
* Word | Bit(s) | Use
* -----+-fedcba9876543210-+----------------
* 0 | --------xxxxxxxx | display y start
* 0 | xxxxxxxx-------- | display y end
* 2 | -------xxxxxxxxx | x position
* 2 | ------x--------- | unknown (used in logicpr2, maybe just a bug?)
* 2 | xxxxxx---------- | unused?
* 4 | ---------xxxxxxx | width
* 4 | --------x------- | is this flip y like in System 16?
* 4 | -------x-------- | flip x
* 4 | xxxxxxx--------- | unused?
* 6 | xxxxxxxxxxxxxxxx | ROM address low bits
* 8 | ----------xxxxxx | color
* 8 | --------xx------ | priority
* 8 | ---xxxxx-------- | ROM address high bits
* 8 | xxx------------- | unused? (extra address bits for larger ROMs?)
* a | ---------------- | zoomx like in System 16?
* c | ---------------- | zoomy like in System 16?
* e | ---------------- |
*/
void deniam_state::draw_sprites( screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect )
{
for (int offs = m_spriteram.bytes() / 2 - 8; offs >= 0; offs -= 8)
{
u8 *rom = m_spritegfx->base();
int sx = (m_spriteram[offs + 1] & 0x01ff) + 16 * 8 - 1;
if (sx >= 512) sx -= 512;
const int starty = m_spriteram[offs + 0] & 0xff;
const int endy = m_spriteram[offs + 0] >> 8;
const int width = m_spriteram[offs + 2] & 0x007f;
bool flipx = m_spriteram[offs + 2] & 0x0100;
if (flipx) sx++;
const u32 color = 0x40 + (m_spriteram[offs + 4] & 0x3f);
int primask = 8;
switch (m_spriteram[offs + 4] & 0xc0)
{
case 0x00: primask |= 4 | 2 | 1; break; /* below everything */
case 0x40: primask |= 4 | 2; break; /* below fg and tx */
case 0x80: primask |= 4; break; /* below tx */
case 0xc0: break; /* above everything */
}
const int start = m_spriteram[offs + 3] + ((m_spriteram[offs + 4] & 0x1f00) << 8);
rom += 2 * start;
for (int y = starty + 1; y <= endy; y++)
{
bool drawing = false;
int i = 0;
rom += 2 * width; /* note that the first line is skipped */
int x = 0;
while (i < 512) /* safety check */
{
if (flipx)
{
if ((rom[i] & 0x0f) == 0x0f)
{
if (!drawing) drawing = true;
else break;
}
else
{
if (rom[i] & 0x0f)
{
if (cliprect.contains(sx + x, y))
{
if ((screen.priority().pix8(y, sx + x) & primask) == 0)
bitmap.pix16(y, sx + x) = color * 16 + (rom[i] & 0x0f);
screen.priority().pix8(y, sx + x) = 8;
}
}
x++;
}
if ((rom[i] & 0xf0) == 0xf0)
{
if (!drawing) drawing = true;
else break;
}
else
{
if (rom[i] & 0xf0)
{
if (cliprect.contains(sx + x, y))
{
if ((screen.priority().pix8(y, sx + x) & primask) == 0)
bitmap.pix16(y, sx + x) = color * 16+(rom[i] >> 4);
screen.priority().pix8(y, sx + x) = 8;
}
}
x++;
}
i--;
}
else
{
if ((rom[i] & 0xf0) == 0xf0)
{
if (!drawing) drawing = true;
else break;
}
else
{
if (rom[i] & 0xf0)
{
if (cliprect.contains(sx + x, y))
{
if ((screen.priority().pix8(y, sx + x) & primask) == 0)
bitmap.pix16(y, sx + x) = color * 16 + (rom[i] >> 4);
screen.priority().pix8(y, sx + x) = 8;
}
}
x++;
}
if ((rom[i] & 0x0f) == 0x0f)
{
if (!drawing) drawing = true;
else break;
}
else
{
if (rom[i] & 0x0f)
{
if (cliprect.contains(sx + x, y))
{
if ((screen.priority().pix8(y, sx + x) & primask) == 0)
bitmap.pix16(y, sx + x) = color * 16 + (rom[i] & 0x0f);
screen.priority().pix8(y, sx + x) = 8;
}
}
x++;
}
i++;
}
}
}
}
}
void deniam_state::set_bg_page( int page, int value )
{
if (m_bg_page[page] != value)
{
m_bg_page[page] = value;
for (int tile_index = page * 0x800; tile_index < (page + 1) * 0x800; tile_index++)
m_bg_tilemap->mark_tile_dirty(tile_index);
}
}
void deniam_state::set_fg_page( int page, int value )
{
if (m_fg_page[page] != value)
{
m_fg_page[page] = value;
for (int tile_index = page * 0x800; tile_index < (page + 1) * 0x800; tile_index++)
m_fg_tilemap->mark_tile_dirty(tile_index);
}
}
u32 deniam_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int page;
if (!m_display_enable)
{
bitmap.fill(m_palette->black_pen(), cliprect);
return 0; /* don't update (freeze display) */
}
int bg_scrollx = m_textram[m_bg_scrollx_reg] - m_bg_scrollx_offs;
int bg_scrolly = (m_textram[m_bg_scrolly_reg] & 0xff) - m_bg_scrolly_offs;
page = m_textram[m_bg_page_reg];
set_bg_page(3, (page >>12) & 0x0f);
set_bg_page(2, (page >> 8) & 0x0f);
set_bg_page(1, (page >> 4) & 0x0f);
set_bg_page(0, (page >> 0) & 0x0f);
int fg_scrollx = m_textram[m_fg_scrollx_reg] - m_fg_scrollx_offs;
int fg_scrolly = (m_textram[m_fg_scrolly_reg] & 0xff) - m_fg_scrolly_offs;
page = m_textram[m_fg_page_reg];
set_fg_page(3, (page >>12) & 0x0f);
set_fg_page(2, (page >> 8) & 0x0f);
set_fg_page(1, (page >> 4) & 0x0f);
set_fg_page(0, (page >> 0) & 0x0f);
m_bg_tilemap->set_scrollx(0, bg_scrollx & 0x1ff);
m_bg_tilemap->set_scrolly(0, bg_scrolly & 0x0ff);
m_fg_tilemap->set_scrollx(0, fg_scrollx & 0x1ff);
m_fg_tilemap->set_scrolly(0, fg_scrolly & 0x0ff);
screen.priority().fill(0, cliprect);
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 1);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 2);
m_tx_tilemap->draw(screen, bitmap, cliprect, 0, 4);
draw_sprites(screen, bitmap, cliprect);
return 0;
}