/******************************************************************************
Video Hardware for Nichibutsu Mahjong series.
Driver by Takahiro Nogi <nogi@kt.rim.or.jp> 1999/11/05 -
******************************************************************************/
#include "emu.h"
#include "includes/nb1413m3.h"
#include "includes/nbmj8991.h"
static void nbmj8991_vramflip(running_machine &machine);
static void nbmj8991_gfxdraw(running_machine &machine);
static void update_pixel(running_machine &machine, int x, int y);
/******************************************************************************
******************************************************************************/
WRITE8_HANDLER( nbmj8991_palette_type1_w )
{
int r, g, b;
space->machine().generic.paletteram.u8[offset] = data;
if (!(offset & 1)) return;
offset &= 0x1fe;
r = ((space->machine().generic.paletteram.u8[offset + 0] & 0x0f) >> 0);
g = ((space->machine().generic.paletteram.u8[offset + 1] & 0xf0) >> 4);
b = ((space->machine().generic.paletteram.u8[offset + 1] & 0x0f) >> 0);
palette_set_color_rgb(space->machine(), (offset >> 1), pal4bit(r), pal4bit(g), pal4bit(b));
}
WRITE8_HANDLER( nbmj8991_palette_type2_w )
{
int r, g, b;
space->machine().generic.paletteram.u8[offset] = data;
if (!(offset & 1)) return;
offset &= 0x1fe;
r = ((space->machine().generic.paletteram.u8[offset + 0] & 0x7c) >> 2);
g = (((space->machine().generic.paletteram.u8[offset + 0] & 0x03) << 3) | ((space->machine().generic.paletteram.u8[offset + 1] & 0xe0) >> 5));
b = ((space->machine().generic.paletteram.u8[offset + 1] & 0x1f) >> 0);
palette_set_color_rgb(space->machine(), (offset / 2), pal5bit(r), pal5bit(g), pal5bit(b));
}
WRITE8_HANDLER( nbmj8991_palette_type3_w )
{
int r, g, b;
space->machine().generic.paletteram.u8[offset] = data;
if (!(offset & 1)) return;
offset &= 0x1fe;
r = ((space->machine().generic.paletteram.u8[offset + 1] & 0x0f) >> 0);
g = ((space->machine().generic.paletteram.u8[offset + 0] & 0xf0) >> 4);
b = ((space->machine().generic.paletteram.u8[offset + 0] & 0x0f) >> 0);
palette_set_color_rgb(space->machine(), (offset >> 1), pal4bit(r), pal4bit(g), pal4bit(b));
}
/******************************************************************************
******************************************************************************/
WRITE8_HANDLER( nbmj8991_blitter_w )
{
nbmj8991_state *state = space->machine().driver_data<nbmj8991_state>();
int gfxlen = space->machine().region("gfx1")->bytes();
switch (offset)
{
case 0x00: state->m_blitter_src_addr = (state->m_blitter_src_addr & 0xff00) | data; break;
case 0x01: state->m_blitter_src_addr = (state->m_blitter_src_addr & 0x00ff) | (data << 8); break;
case 0x02: break;
case 0x03: break;
case 0x04: state->m_blitter_sizex = data; break;
case 0x05: state->m_blitter_sizey = data;
/* writing here also starts the blit */
nbmj8991_gfxdraw(space->machine());
break;
case 0x06: state->m_blitter_direction_x = (data & 0x01) ? 1 : 0;
state->m_blitter_direction_y = (data & 0x02) ? 1 : 0;
state->m_flipscreen = (data & 0x04) ? 0 : 1;
state->m_dispflag = (data & 0x10) ? 0 : 1;
nbmj8991_vramflip(space->machine());
break;
case 0x07: break;
case 0x10: state->m_blitter_destx = (state->m_blitter_destx & 0xff00) | data; break;
case 0x20: state->m_blitter_desty = (state->m_blitter_desty & 0xff00) | data; break;
case 0x30: state->m_scrollx = (state->m_scrollx & 0xff00) | data; break;
case 0x40: state->m_scrolly = (state->m_scrolly & 0xff00) | data; break;
case 0x50: state->m_blitter_destx = (state->m_blitter_destx & 0x00ff) | ((data & 0x01) << 8);
state->m_blitter_desty = (state->m_blitter_desty & 0x00ff) | ((data & 0x02) << 7);
state->m_scrollx = (state->m_scrollx & 0x00ff) | ((data & 0x04) << 6);
state->m_scrolly = (state->m_scrolly & 0x00ff) | ((data & 0x08) << 5);
break;
case 0x60: state->m_gfxrom = data; break;
case 0x70: state->m_clutsel = data; break;
}
if ((0x20000 * state->m_gfxrom) > (gfxlen - 1))
{
#ifdef MAME_DEBUG
popmessage("GFXROM BANK OVER!!");
#endif
state->m_gfxrom &= (gfxlen / 0x20000 - 1);
}
}
READ8_HANDLER( nbmj8991_clut_r )
{
nbmj8991_state *state = space->machine().driver_data<nbmj8991_state>();
return state->m_clut[offset];
}
WRITE8_HANDLER( nbmj8991_clut_w )
{
nbmj8991_state *state = space->machine().driver_data<nbmj8991_state>();
state->m_clut[((state->m_clutsel & 0x7f) * 0x10) + (offset & 0x0f)] = data;
}
/******************************************************************************
******************************************************************************/
static void nbmj8991_vramflip(running_machine &machine)
{
nbmj8991_state *state = machine.driver_data<nbmj8991_state>();
int x, y;
UINT8 color1, color2;
int width = machine.primary_screen->width();
int height = machine.primary_screen->height();
if (state->m_flipscreen == state->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 = state->m_videoram[(y * width) + x];
color2 = state->m_videoram[(((height - 1) - y) * width) + (((width / 2) - 1) - x)];
state->m_videoram[(y * width) + x] = color2;
state->m_videoram[(((height - 1) - y) * width) + (((width / 2) - 1) - x)] = color1;
// rotate 180 degrees ( 512, 0) - (1023, 511)
color1 = state->m_videoram[(y * width) + (x + (width / 2))];
color2 = state->m_videoram[(((height - 1) - y) * width) + ((((width / 2) - 1) - x) + (width / 2))];
state->m_videoram[(y * width) + (x + (width / 2))] = color2;
state->m_videoram[(((height - 1) - y) * width) + ((((width / 2) - 1) - x) + (width / 2))] = color1;
}
}
state->m_flipscreen_old = state->m_flipscreen;
state->m_screen_refresh = 1;
}
static void update_pixel(running_machine &machine, int x, int y)
{
nbmj8991_state *state = machine.driver_data<nbmj8991_state>();
UINT8 color = state->m_videoram[(y * machine.primary_screen->width()) + x];
*BITMAP_ADDR16(state->m_tmpbitmap, y, x) = color;
}
static TIMER_CALLBACK( blitter_timer_callback )
{
nb1413m3_busyflag = 1;
}
static void nbmj8991_gfxdraw(running_machine &machine)
{
nbmj8991_state *state = machine.driver_data<nbmj8991_state>();
UINT8 *GFX = machine.region("gfx1")->base();
int width = machine.primary_screen->width();
int x, y;
int dx1, dx2, dy;
int startx, starty;
int sizex, sizey;
int skipx, skipy;
int ctrx, ctry;
UINT8 color, color1, color2;
int gfxaddr, gfxlen;
nb1413m3_busyctr = 0;
if (state->m_blitter_direction_x)
{
startx = state->m_blitter_destx;
sizex = state->m_blitter_sizex ^ 0xff;
skipx = 1;
}
else
{
startx = state->m_blitter_destx + state->m_blitter_sizex;
sizex = state->m_blitter_sizex;
skipx = -1;
}
if (state->m_blitter_direction_y)
{
starty = state->m_blitter_desty;
sizey = state->m_blitter_sizey ^ 0xff;
skipy = 1;
}
else
{
starty = state->m_blitter_desty + state->m_blitter_sizey;
sizey = state->m_blitter_sizey;
skipy = -1;
}
gfxlen = machine.region("gfx1")->bytes();
gfxaddr = (state->m_gfxrom << 17) + (state->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 (!state->m_flipscreen)
{
dx1 ^= 0x1ff;
dx2 ^= 0x1ff;
dy ^= 0x1ff;
}
if (state->m_blitter_direction_x)
{
// flip
color1 = (color & 0x0f) >> 0;
color2 = (color & 0xf0) >> 4;
}
else
{
// normal
color1 = (color & 0xf0) >> 4;
color2 = (color & 0x0f) >> 0;
}
color1 = state->m_clut[((state->m_clutsel & 0x7f) * 0x10) + color1];
color2 = state->m_clut[((state->m_clutsel & 0x7f) * 0x10) + color2];
if (color1 != 0xff)
{
state->m_videoram[(dy * width) + dx1] = color1;
update_pixel(machine, dx1, dy);
}
if (color2 != 0xff)
{
state->m_videoram[(dy * width) + dx2] = color2;
update_pixel(machine, dx2, dy);
}
nb1413m3_busyctr++;
}
}
nb1413m3_busyflag = 0;
machine.scheduler().timer_set(attotime::from_nsec(1650) * nb1413m3_busyctr, FUNC(blitter_timer_callback));
}
/******************************************************************************
******************************************************************************/
VIDEO_START( nbmj8991 )
{
nbmj8991_state *state = machine.driver_data<nbmj8991_state>();
int width = machine.primary_screen->width();
int height = machine.primary_screen->height();
state->m_tmpbitmap = machine.primary_screen->alloc_compatible_bitmap();
state->m_videoram = auto_alloc_array(machine, UINT8, width * height);
state->m_clut = auto_alloc_array(machine, UINT8, 0x800);
memset(state->m_videoram, 0x00, (width * height * sizeof(UINT8)));
}
SCREEN_UPDATE( nbmj8991_type1 )
{
nbmj8991_state *state = screen->machine().driver_data<nbmj8991_state>();
int x, y;
if (state->m_screen_refresh)
{
int width = screen->machine().primary_screen->width();
int height = screen->machine().primary_screen->height();
state->m_screen_refresh = 0;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
update_pixel(screen->machine(), x, y);
}
if (state->m_dispflag)
{
int scrollx, scrolly;
if (state->m_flipscreen)
{
scrollx = (((-state->m_scrollx) + 0x000) & 0x1ff) * 2;
scrolly = ((-state->m_scrolly) - 0x00f) & 0x1ff;
}
else
{
scrollx = (((-state->m_scrollx) - 0x100) & 0x1ff) * 2;
scrolly = (( state->m_scrolly) + 0x0f1) & 0x1ff;
}
copyscrollbitmap(bitmap, state->m_tmpbitmap, 1, &scrollx, 1, &scrolly, cliprect);
}
else
bitmap_fill(bitmap, 0, 0);
return 0;
}
SCREEN_UPDATE( nbmj8991_type2 )
{
nbmj8991_state *state = screen->machine().driver_data<nbmj8991_state>();
int x, y;
if (state->m_screen_refresh)
{
int width = screen->width();
int height = screen->height();
state->m_screen_refresh = 0;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
update_pixel(screen->machine(), x, y);
}
if (nb1413m3_inputport & 0x20)
{
int scrollx, scrolly;
if (state->m_flipscreen)
{
scrollx = (((-state->m_scrollx) + 0x000) & 0x1ff) * 2;
scrolly = ((-state->m_scrolly) - 0x00f) & 0x1ff;
}
else
{
scrollx = (((-state->m_scrollx) - 0x100) & 0x1ff) * 2;
scrolly = (( state->m_scrolly) + 0x0f1) & 0x1ff;
}
copyscrollbitmap(bitmap, state->m_tmpbitmap, 1, &scrollx, 1, &scrolly, cliprect);
}
else
bitmap_fill(bitmap, 0, 0);
return 0;
}