// license:BSD-3-Clause
// copyright-holders:Takahiro Nogi
/******************************************************************************
Video Hardware for Nichibutsu Mahjong series.
Driver by Takahiro Nogi <nogi@kt.rim.or.jp> 1999/11/05 -
******************************************************************************/
#include "emu.h"
#include "includes/nbmj8900.h"
/******************************************************************************
******************************************************************************/
READ8_MEMBER(nbmj8900_state::palette_type1_r)
{
return m_palette_ptr[offset];
}
WRITE8_MEMBER(nbmj8900_state::palette_type1_w)
{
int r, g, b;
m_palette_ptr[offset] = data;
if (!(offset & 1)) return;
offset &= 0x1fe;
r = ((m_palette_ptr[offset + 0] & 0x0f) >> 0);
g = ((m_palette_ptr[offset + 1] & 0xf0) >> 4);
b = ((m_palette_ptr[offset + 1] & 0x0f) >> 0);
m_palette->set_pen_color((offset >> 1), pal4bit(r), pal4bit(g), pal4bit(b));
}
#ifdef UNUSED_FUNCTION
READ8_MEMBER(nbmj8900_state::palette_type2_r)
{
return m_palette_ptr[offset];
}
WRITE8_MEMBER(nbmj8900_state::palette_type2_w)
{
int r, g, b;
m_palette_ptr[offset] = data;
if (!(offset & 0x100)) return;
offset &= 0x0ff;
r = ((m_palette_ptr[offset + 0x000] & 0x0f) >> 0);
g = ((m_palette_ptr[offset + 0x000] & 0xf0) >> 4);
b = ((m_palette_ptr[offset + 0x100] & 0x0f) >> 0);
m_palette->set_pen_color((offset & 0x0ff), pal4bit(r), pal4bit(g), pal4bit(b));
}
READ8_MEMBER(nbmj8900_state::palette_type3_r)
{
return m_palette_ptr[offset];
}
WRITE8_MEMBER(nbmj8900_state::palette_type3_w)
{
int r, g, b;
m_palette_ptr[offset] = data;
if (!(offset & 1)) return;
offset &= 0x1fe;
r = ((m_palette_ptr[offset + 1] & 0x0f) >> 0);
g = ((m_palette_ptr[offset + 0] & 0xf0) >> 4);
b = ((m_palette_ptr[offset + 0] & 0x0f) >> 0);
m_palette->set_pen_color((offset >> 1), pal4bit(r), pal4bit(g), pal4bit(b));
}
#endif
WRITE8_MEMBER(nbmj8900_state::clutsel_w)
{
m_clutsel = data;
}
READ8_MEMBER(nbmj8900_state::clut_r)
{
return m_clut[offset];
}
WRITE8_MEMBER(nbmj8900_state::clut_w)
{
m_clut[((m_clutsel & 0x7f) * 0x10) + (offset & 0x0f)] = data;
}
/******************************************************************************
******************************************************************************/
WRITE8_MEMBER(nbmj8900_state::blitter_w)
{
switch (offset)
{
case 0x00: m_blitter_src_addr = (m_blitter_src_addr & 0xff00) | data; break;
case 0x01: m_blitter_src_addr = (m_blitter_src_addr & 0x00ff) | (data << 8); break;
case 0x02: m_blitter_destx = data; break;
case 0x03: m_blitter_desty = data; break;
case 0x04: m_blitter_sizex = data; break;
case 0x05: m_blitter_sizey = data;
/* writing here also starts the blit */
gfxdraw();
break;
case 0x06: m_blitter_direction_x = (data & 0x01) ? 1 : 0;
m_blitter_direction_y = (data & 0x02) ? 1 : 0;
m_flipscreen = (data & 0x04) ? 1 : 0;
m_dispflag = (data & 0x08) ? 0 : 1;
if (m_gfxdraw_mode) vramflip(1);
vramflip(0);
break;
case 0x07: break;
}
}
WRITE8_MEMBER(nbmj8900_state::scrolly_w)
{
m_scrolly = data;
}
WRITE8_MEMBER(nbmj8900_state::vramsel_w)
{
/* protection - not sure about this */
m_nb1413m3->m_sndromrgntag = (data & 0x20) ? "protdata" : "voice";
m_vram = data;
}
WRITE8_MEMBER(nbmj8900_state::romsel_w)
{
m_gfxrom = (data & 0x0f);
if ((0x20000 * m_gfxrom) > (memregion("gfx")->bytes() - 1))
{
#ifdef MAME_DEBUG
popmessage("GFXROM BANK OVER!!");
#endif
m_gfxrom &= (memregion("gfx")->bytes() / 0x20000 - 1);
}
}
/******************************************************************************
******************************************************************************/
void nbmj8900_state::vramflip(int vram)
{
int x, y;
unsigned char color1, color2;
unsigned char *vidram;
int width = m_screen->width();
int height = m_screen->height();
if (m_flipscreen == m_flipscreen_old) return;
vidram = vram ? m_videoram1.get() : m_videoram0.get();
for (y = 0; y < (height / 2); y++)
{
for (x = 0; x < width; x++)
{
color1 = vidram[(y * width) + x];
color2 = vidram[((y ^ 0xff) * width) + (x ^ 0x1ff)];
vidram[(y * width) + x] = color2;
vidram[((y ^ 0xff) * width) + (x ^ 0x1ff)] = color1;
}
}
m_flipscreen_old = m_flipscreen;
m_screen_refresh = 1;
}
void nbmj8900_state::update_pixel0(int x, int y)
{
uint8_t color = m_videoram0[(y * m_screen_width) + x];
m_tmpbitmap0.pix16(y, x) = m_palette->pen(color);
}
void nbmj8900_state::update_pixel1(int x, int y)
{
uint8_t color = m_videoram1[(y * m_screen_width) + x];
m_tmpbitmap1.pix16(y, x) = m_palette->pen(color);
}
void nbmj8900_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
case TIMER_BLITTER:
m_nb1413m3->busyflag_w(1);
break;
default:
throw emu_fatalerror("Unknown id in nbmj8900_state::device_timer");
}
}
void nbmj8900_state::gfxdraw()
{
unsigned char *GFX = memregion("gfx")->base();
int x, y;
int dx1, dx2, dy1, dy2;
int startx, starty;
int sizex, sizey;
int skipx, skipy;
int ctrx, ctry;
unsigned char color, color1, color2;
int gfxaddr;
m_nb1413m3->m_busyctr = 0;
startx = m_blitter_destx + m_blitter_sizex;
starty = m_blitter_desty + m_blitter_sizey;
if (m_blitter_direction_x)
{
sizex = m_blitter_sizex ^ 0xff;
skipx = 1;
}
else
{
sizex = m_blitter_sizex;
skipx = -1;
}
if (m_blitter_direction_y)
{
sizey = m_blitter_sizey ^ 0xff;
skipy = 1;
}
else
{
sizey = m_blitter_sizey;
skipy = -1;
}
gfxaddr = (m_gfxrom << 17) + (m_blitter_src_addr << 1);
for (y = starty, ctry = sizey; ctry >= 0; y += skipy, ctry--)
{
for (x = startx, ctrx = sizex; ctrx >= 0; x += skipx, ctrx--)
{
if ((gfxaddr > (memregion("gfx")->bytes() - 1)))
{
#ifdef MAME_DEBUG
popmessage("GFXROM ADDRESS OVER!!");
#endif
gfxaddr &= (memregion("gfx")->bytes() - 1);
}
color = GFX[gfxaddr++];
// for hanamomo
if ((m_nb1413m3->m_nb1413m3_type == NB1413M3_HANAMOMO) && ((gfxaddr >= 0x20000) && (gfxaddr < 0x28000)))
{
color |= ((color & 0x0f) << 4);
}
dx1 = (2 * x + 0) & 0x1ff;
dx2 = (2 * x + 1) & 0x1ff;
if (m_gfxdraw_mode)
{
// 2 layer type
dy1 = y & 0xff;
dy2 = (y + m_scrolly) & 0xff;
}
else
{
// 1 layer type
dy1 = (y + m_scrolly) & 0xff;
dy2 = 0;
}
if (!m_flipscreen)
{
dx1 ^= 0x1ff;
dx2 ^= 0x1ff;
dy1 ^= 0xff;
dy2 ^= 0xff;
}
if (m_blitter_direction_x)
{
// flip
color1 = (color & 0x0f) >> 0;
color2 = (color & 0xf0) >> 4;
}
else
{
// normal
color1 = (color & 0xf0) >> 4;
color2 = (color & 0x0f) >> 0;
}
color1 = m_clut[((m_clutsel & 0x7f) << 4) + color1];
color2 = m_clut[((m_clutsel & 0x7f) << 4) + color2];
if ((!m_gfxdraw_mode) || (m_vram & 0x01))
{
// layer 1
if (color1 != 0xff)
{
m_videoram0[(dy1 * m_screen_width) + dx1] = color1;
update_pixel0(dx1, dy1);
}
if (color2 != 0xff)
{
m_videoram0[(dy1 * m_screen_width) + dx2] = color2;
update_pixel0(dx2, dy1);
}
}
if (m_gfxdraw_mode && (m_vram & 0x02))
{
// layer 2
if (m_vram & 0x08)
{
// transparent enable
if (color1 != 0xff)
{
m_videoram1[(dy2 * m_screen_width) + dx1] = color1;
update_pixel1(dx1, dy2);
}
if (color2 != 0xff)
{
m_videoram1[(dy2 * m_screen_width) + dx2] = color2;
update_pixel1(dx2, dy2);
}
}
else
{
// transparent disable
m_videoram1[(dy2 * m_screen_width) + dx1] = color1;
update_pixel1(dx1, dy2);
m_videoram1[(dy2 * m_screen_width) + dx2] = color2;
update_pixel1(dx2, dy2);
}
}
m_nb1413m3->m_busyctr++;
}
}
m_nb1413m3->busyflag_w(0);
m_blitter_timer->adjust(attotime::from_nsec(2500) * m_nb1413m3->m_busyctr);
}
/******************************************************************************
******************************************************************************/
void nbmj8900_state::video_start()
{
m_screen_width = m_screen->width();
m_screen_height = m_screen->height();
m_blitter_timer = timer_alloc(TIMER_BLITTER);
m_screen->register_screen_bitmap(m_tmpbitmap0);
m_screen->register_screen_bitmap(m_tmpbitmap1);
m_videoram0 = std::make_unique<uint8_t[]>(m_screen_width * m_screen_height);
m_videoram1 = std::make_unique<uint8_t[]>(m_screen_width * m_screen_height);
m_palette_ptr = std::make_unique<uint8_t[]>(0x200);
m_clut = std::make_unique<uint8_t[]>(0x800);
memset(m_videoram0.get(), 0xff, (m_screen_width * m_screen_height * sizeof(uint8_t)));
memset(m_videoram1.get(), 0xff, (m_screen_width * m_screen_height * sizeof(uint8_t)));
// m_palette->pen(0x07f) = 0xff; /* palette_transparent_pen */
m_gfxdraw_mode = 1;
m_screen_refresh = 1;
save_item(NAME(m_scrolly));
save_item(NAME(m_blitter_destx));
save_item(NAME(m_blitter_desty));
save_item(NAME(m_blitter_sizex));
save_item(NAME(m_blitter_sizey));
save_item(NAME(m_blitter_src_addr));
save_item(NAME(m_blitter_direction_x));
save_item(NAME(m_blitter_direction_y));
save_item(NAME(m_vram));
save_item(NAME(m_gfxrom));
save_item(NAME(m_dispflag));
save_item(NAME(m_flipscreen));
save_item(NAME(m_clutsel));
//save_item(NAME(m_gfxdraw_mode)); //always 1?
save_pointer(NAME(m_videoram0), m_screen_width * m_screen_height);
save_pointer(NAME(m_videoram1), m_screen_width * m_screen_height);
save_pointer(NAME(m_palette_ptr), 0x200);
save_pointer(NAME(m_clut), 0x800);
save_item(NAME(m_flipscreen_old));
}
void nbmj8900_state::postload()
{
m_screen_refresh = 1;
}
/******************************************************************************
******************************************************************************/
uint32_t nbmj8900_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x, y;
if (m_screen_refresh)
{
m_screen_refresh = 0;
for (y = 0; y < m_screen_height; y++)
{
for (x = 0; x < m_screen_width; x++)
{
update_pixel0(x, y);
}
}
if (m_gfxdraw_mode)
{
for (y = 0; y < m_screen_height; y++)
{
for (x = 0; x < m_screen_width; x++)
{
update_pixel1(x, y);
}
}
}
}
if (m_dispflag)
{
int scrolly;
if (!m_flipscreen) scrolly = m_scrolly;
else scrolly = (-m_scrolly) & 0xff;
if (m_gfxdraw_mode)
{
copyscrollbitmap(bitmap, m_tmpbitmap0, 0, nullptr, 0, nullptr, cliprect);
copyscrollbitmap_trans(bitmap, m_tmpbitmap1, 0, nullptr, 1, &scrolly, cliprect, 0xff);
}
else
{
copyscrollbitmap(bitmap, m_tmpbitmap0, 0, nullptr, 1, &scrolly, cliprect);
}
}
else
{
bitmap.fill(0);
}
return 0;
}