// license:BSD-3-Clause
// copyright-holders:Pierpaolo Prazzoli, Bryan McPhail
/***************************************************************
Pro Yakyuu Nyuudan Test Tryout (JPN Ver.)
video hardware emulation
****************************************************************/
#include "emu.h"
#include "includes/tryout.h"
PALETTE_INIT_MEMBER(tryout_state, tryout)
{
const uint8_t *color_prom = memregion("proms")->base();
for (int i = 0;i < palette.entries();i++)
{
int bit0,bit1,bit2,r,g,b;
/* red component */
bit0 = (color_prom[i] >> 0) & 0x01;
bit1 = (color_prom[i] >> 1) & 0x01;
bit2 = (color_prom[i] >> 2) & 0x01;
r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = (color_prom[i] >> 3) & 0x01;
bit1 = (color_prom[i] >> 4) & 0x01;
bit2 = (color_prom[i] >> 5) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = 0;
bit1 = (color_prom[i] >> 6) & 0x01;
bit2 = (color_prom[i] >> 7) & 0x01;
b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette.set_pen_color(i,rgb_t(r,g,b));
}
}
TILE_GET_INFO_MEMBER(tryout_state::get_fg_tile_info)
{
int code = m_videoram[tile_index];
int attr = m_videoram[tile_index + 0x400];
code |= ((attr & 0x03) << 8);
int color = ((attr & 0x4)>>2)+6;
SET_TILE_INFO_MEMBER(0, code, color, 0);
}
TILE_GET_INFO_MEMBER(tryout_state::get_bg_tile_info)
{
SET_TILE_INFO_MEMBER(2, m_vram[tile_index] & 0x7f, 2, 0);
}
READ8_MEMBER(tryout_state::vram_r)
{
return m_vram[offset]; // debug only
}
WRITE8_MEMBER(tryout_state::videoram_w)
{
m_videoram[offset] = data;
m_fg_tilemap->mark_tile_dirty(offset & 0x3ff);
}
WRITE8_MEMBER(tryout_state::vram_w)
{
/* There are eight banks of vram - in bank 0 the first 0x400 bytes
is reserved for the tilemap. In banks 2, 4 and 6 the game never
writes to the first 0x400 bytes - I suspect it's either
unused, or it actually mirrors the tilemap ram from the first bank.
The rest of the vram is tile data which has the bitplanes arranged
in a very strange format. For Mame's sake we reformat this on
the fly for easier gfx decode.
Bit 0 of the bank register seems special - it's kept low when uploading
gfx data and then set high from that point onwards.
*/
const uint8_t bank=(m_vram_bank>>1)&0x7;
if ((bank==0 || bank==2 || bank==4 || bank==6) && (offset&0x7ff)<0x400) {
int newoff=offset&0x3ff;
m_vram[newoff]=data;
m_bg_tilemap->mark_tile_dirty(newoff);
return;
}
/*
Bit planes for tiles are arranged as follows within vram (split into high/low nibbles):
0x0400 (0) + 0x0400 (4) + 0x0800(0) - tiles 0x00 to 0x0f
0x0800 (4) + 0x0c00 (0) + 0x0c00(4) - tiles 0x10 to 0x1f
0x1400 (0) + 0x1400 (4) + 0x1800(0) - tiles 0x20 to 0x2f
0x1800 (4) + 0x1c00 (0) + 0x1c00(4) - tiles 0x30 to 0x3f
etc.
*/
offset=(offset&0x7ff) | (bank<<11);
m_vram[offset]=data;
switch (offset&0x1c00) {
case 0x0400:
m_vram_gfx[(offset&0x3ff) + 0x0000 + ((offset&0x2000)>>1)]=(~data&0xf);
m_vram_gfx[(offset&0x3ff) + 0x2000 + ((offset&0x2000)>>1)]=(~data&0xf0)>>4;
break;
case 0x0800:
m_vram_gfx[(offset&0x3ff) + 0x4000 + ((offset&0x2000)>>1)]=(~data&0xf);
m_vram_gfx[(offset&0x3ff) + 0x4400 + ((offset&0x2000)>>1)]=(~data&0xf0)>>4;
break;
case 0x0c00:
m_vram_gfx[(offset&0x3ff) + 0x0400 + ((offset&0x2000)>>1)]=(~data&0xf);
m_vram_gfx[(offset&0x3ff) + 0x2400 + ((offset&0x2000)>>1)]=(~data&0xf0)>>4;
break;
case 0x1400:
m_vram_gfx[(offset&0x3ff) + 0x0800 + ((offset&0x2000)>>1)]=(~data&0xf);
m_vram_gfx[(offset&0x3ff) + 0x2800 + ((offset&0x2000)>>1)]=(~data&0xf0)>>4;
break;
case 0x1800:
m_vram_gfx[(offset&0x3ff) + 0x4800 + ((offset&0x2000)>>1)]=(~data&0xf);
m_vram_gfx[(offset&0x3ff) + 0x4c00 + ((offset&0x2000)>>1)]=(~data&0xf0)>>4;
break;
case 0x1c00:
m_vram_gfx[(offset&0x3ff) + 0x0c00 + ((offset&0x2000)>>1)]=(~data&0xf);
m_vram_gfx[(offset&0x3ff) + 0x2c00 + ((offset&0x2000)>>1)]=(~data&0xf0)>>4;
break;
}
m_gfxdecode->gfx(2)->mark_dirty((offset-0x400/64)&0x7f);
}
WRITE8_MEMBER(tryout_state::vram_bankswitch_w)
{
m_vram_bank = data;
}
WRITE8_MEMBER(tryout_state::flipscreen_w)
{
flip_screen_set(data & 1);
}
TILEMAP_MAPPER_MEMBER(tryout_state::get_fg_memory_offset)
{
return (row ^ 0x1f) + (col << 5);
}
TILEMAP_MAPPER_MEMBER(tryout_state::get_bg_memory_offset)
{
int a;
// if (col&0x20)
// a= (7 - (row & 7)) + ((0x8 - (row & 0x8)) << 4) + ((col & 0xf) << 3) + (( ( 0x10 - (col & 0x10) ) ) << 4) + ((( (col & 0x20))) << 4);
// else
a= (7 - (row & 7)) + ((0x8 - (row & 0x8)) << 4) + ((col & 0xf) << 3) + (( ( (col & 0x10) ) ) << 4) + ((( (col & 0x20))) << 4);
// osd_printf_debug("%d %d -> %d\n",col,row, a);
return a;
}
void tryout_state::video_start()
{
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(tryout_state::get_fg_tile_info),this),tilemap_mapper_delegate(FUNC(tryout_state::get_fg_memory_offset),this),8,8,32,32);
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(tryout_state::get_bg_tile_info),this),tilemap_mapper_delegate(FUNC(tryout_state::get_bg_memory_offset),this),16,16,64,16);
m_vram=std::make_unique<uint8_t[]>(8 * 0x800);
m_vram_gfx=std::make_unique<uint8_t[]>(0x6000);
m_gfxdecode->gfx(2)->set_source(m_vram_gfx.get());
m_fg_tilemap->set_transparent_pen(0);
save_item(NAME(m_vram_bank));
save_pointer(NAME(m_vram), 8 * 0x800);
save_pointer(NAME(m_vram_gfx), 0x6000);
}
void tryout_state::draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect)
{
int offs,fx,fy,x,y,color,sprite,inc;
for (offs = 0;offs < 0x7f;offs += 4)
{
if (!(m_spriteram[offs]&1))
continue;
sprite = m_spriteram[offs+1] + ((m_spriteram2[offs]&7)<<8);
x = m_spriteram[offs+3]-3;
y = m_spriteram[offs+2];
color = 0;//(m_spriteram[offs] & 8)>>3;
fx = (m_spriteram[offs] & 8)>>3;
fy = 0;
inc = 16;
if (flip_screen())
{
x = 240 - x;
fx = !fx;
y = 240 - y;
fy = !fy;
inc = -inc;
}
/* Double Height */
if(m_spriteram[offs] & 0x10)
{
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
sprite,
color,fx,fy,x,y + inc,0);
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
sprite+1,
color,fx,fy,x,y,0);
}
else
{
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
sprite,
color,fx,fy,x,y,0);
}
}
}
uint32_t tryout_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int scrollx = 0;
if (!flip_screen())
m_fg_tilemap->set_scrollx(0, 16); /* Assumed hard-wired */
else
m_fg_tilemap->set_scrollx(0, -8); /* Assumed hard-wired */
scrollx = m_gfx_control[1] + ((m_gfx_control[0]&1)<<8) + ((m_gfx_control[0]&4)<<7) - ((m_gfx_control[0] & 2) ? 0 : 0x100);
/* wrap-around */
if(m_gfx_control[1] == 0) { scrollx+=0x100; }
m_bg_tilemap->set_scrollx(0, scrollx+2); /* why +2? hard-wired? */
m_bg_tilemap->set_scrolly(0, -m_gfx_control[2]);
if(!(m_gfx_control[0] & 0x8)) // screen disable
{
/* TODO: Color might be different, needs a video from an original pcb. */
bitmap.fill(m_palette->pen(0x10), cliprect);
}
else
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0,0);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0,0);
draw_sprites(bitmap,cliprect);
}
// popmessage("%02x %02x %02x %02x",m_gfx_control[0],m_gfx_control[1],m_gfx_control[2],scrollx);
return 0;
}