// 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/nbmj8991.h"
/******************************************************************************
******************************************************************************/
WRITE8_MEMBER(nbmj8991_state::palette_type1_w)
{
int r, g, b;
m_generic_paletteram_8[offset] = data;
if (!(offset & 1)) return;
offset &= 0x1fe;
r = ((m_generic_paletteram_8[offset + 0] & 0x0f) >> 0);
g = ((m_generic_paletteram_8[offset + 1] & 0xf0) >> 4);
b = ((m_generic_paletteram_8[offset + 1] & 0x0f) >> 0);
m_palette->set_pen_color((offset >> 1), pal4bit(r), pal4bit(g), pal4bit(b));
}
WRITE8_MEMBER(nbmj8991_state::palette_type2_w)
{
int r, g, b;
m_generic_paletteram_8[offset] = data;
if (!(offset & 1)) return;
offset &= 0x1fe;
r = ((m_generic_paletteram_8[offset + 0] & 0x7c) >> 2);
g = (((m_generic_paletteram_8[offset + 0] & 0x03) << 3) | ((m_generic_paletteram_8[offset + 1] & 0xe0) >> 5));
b = ((m_generic_paletteram_8[offset + 1] & 0x1f) >> 0);
m_palette->set_pen_color((offset / 2), pal5bit(r), pal5bit(g), pal5bit(b));
}
WRITE8_MEMBER(nbmj8991_state::palette_type3_w)
{
int r, g, b;
m_generic_paletteram_8[offset] = data;
if (!(offset & 1)) return;
offset &= 0x1fe;
r = ((m_generic_paletteram_8[offset + 1] & 0x0f) >> 0);
g = ((m_generic_paletteram_8[offset + 0] & 0xf0) >> 4);
b = ((m_generic_paletteram_8[offset + 0] & 0x0f) >> 0);
m_palette->set_pen_color((offset >> 1), pal4bit(r), pal4bit(g), pal4bit(b));
}
/******************************************************************************
******************************************************************************/
WRITE8_MEMBER(nbmj8991_state::blitter_w)
{
int gfxlen = memregion("gfx1")->bytes();
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: break;
case 0x03: 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) ? 0 : 1;
m_dispflag = (data & 0x10) ? 0 : 1;
vramflip();
break;
case 0x07: break;
case 0x10: m_blitter_destx = (m_blitter_destx & 0xff00) | data; break;
case 0x20: m_blitter_desty = (m_blitter_desty & 0xff00) | data; break;
case 0x30: m_scrollx = (m_scrollx & 0xff00) | data; break;
case 0x40: m_scrolly = (m_scrolly & 0xff00) | data; break;
case 0x50: m_blitter_destx = (m_blitter_destx & 0x00ff) | ((data & 0x01) << 8);
m_blitter_desty = (m_blitter_desty & 0x00ff) | ((data & 0x02) << 7);
m_scrollx = (m_scrollx & 0x00ff) | ((data & 0x04) << 6);
m_scrolly = (m_scrolly & 0x00ff) | ((data & 0x08) << 5);
break;
case 0x60: m_gfxrom = data; break;
case 0x70: m_clutsel = data; break;
}
if ((0x20000 * m_gfxrom) > (gfxlen - 1))
{
#ifdef MAME_DEBUG
popmessage("GFXROM BANK OVER!!");
#endif
m_gfxrom &= (gfxlen / 0x20000 - 1);
}
}
READ8_MEMBER(nbmj8991_state::clut_r)
{
return m_clut[offset];
}
WRITE8_MEMBER(nbmj8991_state::clut_w)
{
m_clut[((m_clutsel & 0x7f) * 0x10) + (offset & 0x0f)] = data;
}
/******************************************************************************
******************************************************************************/
void nbmj8991_state::vramflip()
{
int x, y;
uint8_t color1, color2;
int width = m_screen->width();
int height = m_screen->height();
if (m_flipscreen == m_flipscreen_old) return;
for (y = 0; y < height / 2; y++)
{
for (x = 0; x < width / 2; x++)
{
// rotate 180 degrees ( 0, 0) - ( 511, 511)
color1 = m_videoram[(y * width) + x];
color2 = m_videoram[(((height - 1) - y) * width) + (((width / 2) - 1) - x)];
m_videoram[(y * width) + x] = color2;
m_videoram[(((height - 1) - y) * width) + (((width / 2) - 1) - x)] = color1;
// rotate 180 degrees ( 512, 0) - (1023, 511)
color1 = m_videoram[(y * width) + (x + (width / 2))];
color2 = m_videoram[(((height - 1) - y) * width) + ((((width / 2) - 1) - x) + (width / 2))];
m_videoram[(y * width) + (x + (width / 2))] = color2;
m_videoram[(((height - 1) - y) * width) + ((((width / 2) - 1) - x) + (width / 2))] = color1;
}
}
m_flipscreen_old = m_flipscreen;
m_screen_refresh = 1;
}
void nbmj8991_state::update_pixel(int x, int y)
{
uint8_t color = m_videoram[(y * m_screen->width()) + x];
m_tmpbitmap.pix16(y, x) = color;
}
void nbmj8991_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
case TIMER_BLITTER:
m_nb1413m3->m_busyflag = 1;
break;
default:
assert_always(false, "Unknown id in nbmj8991_state::device_timer");
}
}
void nbmj8991_state::gfxdraw()
{
uint8_t *GFX = memregion("gfx1")->base();
int width = m_screen->width();
int x, y;
int dx1, dx2, dy;
int startx, starty;
int sizex, sizey;
int skipx, skipy;
int ctrx, ctry;
uint8_t color, color1, color2;
int gfxaddr, gfxlen;
m_nb1413m3->m_busyctr = 0;
if (m_blitter_direction_x)
{
startx = m_blitter_destx;
sizex = m_blitter_sizex ^ 0xff;
skipx = 1;
}
else
{
startx = m_blitter_destx + m_blitter_sizex;
sizex = m_blitter_sizex;
skipx = -1;
}
if (m_blitter_direction_y)
{
starty = m_blitter_desty;
sizey = m_blitter_sizey ^ 0xff;
skipy = 1;
}
else
{
starty = m_blitter_desty + m_blitter_sizey;
sizey = m_blitter_sizey;
skipy = -1;
}
gfxlen = memregion("gfx1")->bytes();
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 > (gfxlen - 1)))
{
#ifdef MAME_DEBUG
popmessage("GFXROM ADDRESS OVER!!");
#endif
gfxaddr &= (gfxlen - 1);
}
color = GFX[gfxaddr++];
dx1 = (2 * x + 0) & 0x3ff;
dx2 = (2 * x + 1) & 0x3ff;
dy = y & 0x1ff;
if (!m_flipscreen)
{
dx1 ^= 0x1ff;
dx2 ^= 0x1ff;
dy ^= 0x1ff;
}
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) * 0x10) + color1];
color2 = m_clut[((m_clutsel & 0x7f) * 0x10) + color2];
if (color1 != 0xff)
{
m_videoram[(dy * width) + dx1] = color1;
update_pixel(dx1, dy);
}
if (color2 != 0xff)
{
m_videoram[(dy * width) + dx2] = color2;
update_pixel(dx2, dy);
}
m_nb1413m3->m_busyctr++;
}
}
m_nb1413m3->m_busyflag = 0;
m_blitter_timer->adjust(attotime::from_nsec(1650) * m_nb1413m3->m_busyctr);
}
/******************************************************************************
******************************************************************************/
void nbmj8991_state::video_start()
{
m_blitter_timer = timer_alloc(TIMER_BLITTER);
int width = m_screen->width();
int height = m_screen->height();
m_screen->register_screen_bitmap(m_tmpbitmap);
m_videoram = std::make_unique<uint8_t[]>(width * height);
m_clut = std::make_unique<uint8_t[]>(0x800);
memset(m_videoram.get(), 0x00, (width * height * sizeof(uint8_t)));
m_screen_refresh = 1;
save_item(NAME(m_scrollx));
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_gfxrom));
save_item(NAME(m_dispflag));
save_item(NAME(m_flipscreen));
save_item(NAME(m_clutsel));
save_pointer(NAME(m_videoram), width * height);
save_pointer(NAME(m_clut), 0x800);
save_item(NAME(m_flipscreen_old));
machine().save().register_postload(save_prepost_delegate(FUNC(nbmj8991_state::postload), this));
}
void nbmj8991_state::postload()
{
m_screen_refresh = 1;
}
uint32_t nbmj8991_state::screen_update_type1(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x, y;
if (m_screen_refresh)
{
int width = m_screen->width();
int height = m_screen->height();
m_screen_refresh = 0;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
update_pixel(x, y);
}
if (m_dispflag)
{
int scrollx, scrolly;
if (m_flipscreen)
{
scrollx = (((-m_scrollx) + 0x000) & 0x1ff) * 2;
scrolly = ((-m_scrolly) - 0x00f) & 0x1ff;
}
else
{
scrollx = (((-m_scrollx) - 0x100) & 0x1ff) * 2;
scrolly = (( m_scrolly) + 0x0f1) & 0x1ff;
}
copyscrollbitmap(bitmap, m_tmpbitmap, 1, &scrollx, 1, &scrolly, cliprect);
}
else
bitmap.fill(0);
return 0;
}
uint32_t nbmj8991_state::screen_update_type2(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int x, y;
if (m_screen_refresh)
{
int width = screen.width();
int height = screen.height();
m_screen_refresh = 0;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
update_pixel(x, y);
}
if (m_nb1413m3->m_inputport & 0x20)
{
int scrollx, scrolly;
if (m_flipscreen)
{
scrollx = (((-m_scrollx) + 0x000) & 0x1ff) * 2;
scrolly = ((-m_scrolly) - 0x00f) & 0x1ff;
}
else
{
scrollx = (((-m_scrollx) - 0x100) & 0x1ff) * 2;
scrolly = (( m_scrolly) + 0x0f1) & 0x1ff;
}
copyscrollbitmap(bitmap, m_tmpbitmap, 1, &scrollx, 1, &scrolly, cliprect);
}
else
bitmap.fill(0);
return 0;
}