// license:BSD-3-Clause
// copyright-holders:R. Belmont, Andrew Gardner
/*
Polygonet Commanders (Konami, 1993)
Video hardware emulation
Currently contains: TTL text plane (probably not complete, needs banking? colors?)
Needs: PSAC2 roz plane, polygons
*/
#include "emu.h"
#include "includes/plygonet.h"
#include "screen.h"
/* TTL text plane */
TILE_GET_INFO_MEMBER(polygonet_state::ttl_get_tile_info)
{
int attr, code;
code = m_ttl_vram[tile_index]&0xfff;
attr = m_ttl_vram[tile_index]>>12; /* palette in all 4 bits? */
SET_TILE_INFO_MEMBER(m_ttl_gfx_index, code, attr, 0);
}
TILE_GET_INFO_MEMBER(polygonet_state::roz_get_tile_info)
{
int attr, code;
attr = (m_roz_vram[tile_index] >> 12) + 16; /* roz base palette is palette 16 */
code = m_roz_vram[tile_index] & 0x3ff;
SET_TILE_INFO_MEMBER(0, code, attr, 0);
}
READ32_MEMBER(polygonet_state::polygonet_ttl_ram_r)
{
uint32_t *vram = (uint32_t *)m_ttl_vram;
return vram[offset];
}
WRITE32_MEMBER(polygonet_state::polygonet_ttl_ram_w)
{
uint32_t *vram = (uint32_t *)m_ttl_vram;
COMBINE_DATA(&vram[offset]);
m_ttl_tilemap->mark_tile_dirty(offset*2);
m_ttl_tilemap->mark_tile_dirty(offset*2+1);
}
READ32_MEMBER(polygonet_state::polygonet_roz_ram_r)
{
uint32_t *vram = (uint32_t *)m_roz_vram;
return vram[offset];
}
WRITE32_MEMBER(polygonet_state::polygonet_roz_ram_w)
{
uint32_t *vram = (uint32_t *)m_roz_vram;
COMBINE_DATA(&vram[offset]);
m_roz_tilemap->mark_tile_dirty(offset*2);
m_roz_tilemap->mark_tile_dirty(offset*2+1);
}
TILEMAP_MAPPER_MEMBER(polygonet_state::plygonet_scan)
{
return row * num_cols + (col^1);
}
TILEMAP_MAPPER_MEMBER(polygonet_state::plygonet_scan_cols)
{
return col * num_rows + (row^1);
}
void polygonet_state::video_start()
{
static const gfx_layout charlayout =
{
8, 8, /* 8x8 */
4096, /* # of tiles */
4, /* 4bpp */
{ 0, 1, 2, 3 }, /* plane offsets */
{ 0*4, 1*4, 2*4, 3*4, 4*4, 5*4, 6*4, 7*4 }, /* X offsets */
{ 0*8*4, 1*8*4, 2*8*4, 3*8*4, 4*8*4, 5*8*4, 6*8*4, 7*8*4 }, /* Y offsets */
8*8*4
};
/* find first empty slot to decode gfx */
for (m_ttl_gfx_index = 0; m_ttl_gfx_index < MAX_GFX_ELEMENTS; m_ttl_gfx_index++)
if (m_gfxdecode->gfx(m_ttl_gfx_index) == nullptr)
break;
assert(m_ttl_gfx_index != MAX_GFX_ELEMENTS);
/* decode the ttl layer's gfx */
m_gfxdecode->set_gfx(m_ttl_gfx_index, std::make_unique<gfx_element>(m_palette, charlayout, memregion("gfx1")->base(), 0, m_palette->entries() / 16, 0));
/* create the tilemap */
m_ttl_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(polygonet_state::ttl_get_tile_info),this), tilemap_mapper_delegate(FUNC(polygonet_state::plygonet_scan),this), 8, 8, 64, 32);
m_ttl_tilemap->set_transparent_pen(0);
/* set up the roz t-map too */
m_roz_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(polygonet_state::roz_get_tile_info),this), tilemap_mapper_delegate(FUNC(polygonet_state::plygonet_scan_cols),this), 16, 16, 32, 64);
m_roz_tilemap->set_transparent_pen(0);
/* save states */
save_item(NAME(m_ttl_gfx_index));
save_item(NAME(m_ttl_vram));
save_item(NAME(m_roz_vram));
}
uint32_t polygonet_state::screen_update_polygonet(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
screen.priority().fill(0);
bitmap.fill(m_palette->black_pen(), cliprect);
m_k053936->zoom_draw(screen, bitmap, cliprect, m_roz_tilemap, 0, 0, 0);
m_ttl_tilemap->draw(screen, bitmap, cliprect, 0, 1<<0);
return 0;
}