// license:BSD-3-Clause
// copyright-holders:Mirko Buffoni, Nicola Salmoria, Tomasz Slanina
/***************************************************************************
video.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/superqix.h"
/***************************************************************************
Callbacks for the TileMap code
***************************************************************************/
TILE_GET_INFO_MEMBER(hotsmash_state::pb_get_bg_tile_info)
{
int attr = m_videoram[tile_index + 0x400];
int code = m_videoram[tile_index] + 256 * (attr & 0x7);
int color = (attr & 0xf0) >> 4;
SET_TILE_INFO_MEMBER(0, code, color, 0);
}
TILE_GET_INFO_MEMBER(superqix_state_base::sqix_get_bg_tile_info)
{
int attr = m_videoram[tile_index + 0x400];
int bank = (attr & 0x04) ? 0 : 1;
int code = m_videoram[tile_index] + 256 * (attr & 0x03);
int color = (attr & 0xf0) >> 4;
if (bank) code += 1024 * m_gfxbank;
SET_TILE_INFO_MEMBER(bank, code, color, 0);
tileinfo.group = (attr & 0x08) >> 3;
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
void hotsmash_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(hotsmash_state::pb_get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8,32,32);
}
void superqix_state::video_start()
{
m_fg_bitmap[0] = std::make_unique<bitmap_ind16>(256, 256);
m_fg_bitmap[1] = std::make_unique<bitmap_ind16>(256, 256);
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(superqix_state_base::sqix_get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
m_bg_tilemap->set_transmask(0, 0xffff, 0x0000); // split type 0 is totally transparent in front half
m_bg_tilemap->set_transmask(1, 0x0001, 0xfffe); // split type 1 has pen 0 transparent in front half
save_item(NAME(*m_fg_bitmap[0]));
save_item(NAME(*m_fg_bitmap[1]));
}
rgb_t superqix_state_base::BBGGRRII(uint32_t raw)
{
uint8_t const i = raw & 3;
uint8_t const r = (raw >> 0) & 0x0c;
uint8_t const g = (raw >> 2) & 0x0c;
uint8_t const b = (raw >> 4) & 0x0c;
return rgb_t(pal4bit(r | i), pal4bit(g | i), pal4bit(b | i));
}
/***************************************************************************
Memory handlers
***************************************************************************/
WRITE8_MEMBER(superqix_state_base::superqix_videoram_w)
{
m_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset & 0x3ff);
}
WRITE8_MEMBER(superqix_state_base::superqix_bitmapram_w)
{
if (m_bitmapram[offset] != data)
{
int x = 2 * (offset % 128);
int y = offset / 128 + 16;
m_bitmapram[offset] = data;
m_fg_bitmap[0]->pix16(y, x) = data >> 4;
m_fg_bitmap[0]->pix16(y, x + 1) = data & 0x0f;
}
}
WRITE8_MEMBER(superqix_state_base::superqix_bitmapram2_w)
{
if (data != m_bitmapram2[offset])
{
int x = 2 * (offset % 128);
int y = offset / 128 + 16;
m_bitmapram2[offset] = data;
m_fg_bitmap[1]->pix16(y, x) = data >> 4;
m_fg_bitmap[1]->pix16(y, x + 1) = data & 0x0f;
}
}
WRITE8_MEMBER(hotsmash_state::pbillian_0410_w)
{
/*
-------0 ? [not used]
------1- coin counter 1
-----2-- coin counter 2
----3--- rom 2 HI (reserved for ROM banking , not used)
---4---- nmi enable/disable
--5----- flip screen
*/
if (data&0xc1) logerror("%04x: pbillian_0410_w with invalid bits: %02x\n",m_maincpu->pc(),data);
machine().bookkeeping().coin_counter_w(0,BIT(data,1));
machine().bookkeeping().coin_counter_w(1,BIT(data,2));
membank("bank1")->set_entry(BIT(data,3));
m_nmi_mask = BIT(data,4);
if (!(m_nmi_mask)) m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
flip_screen_set(BIT(data,5));
}
WRITE8_MEMBER(superqix_state_base::superqix_0410_w)
{
/*
------10 tile bank
-----2-- bitmap page select
----3--- nmi enable/disable
--54---- rom bank
*/
if (data&0xc0) logerror("%04x: superqix_0410_w with invalid high bits: %02x\n",m_maincpu->pc(),data);
/* bits 0-1 select the tile bank */
if (m_gfxbank != (data & 0x03))
{
m_gfxbank = data & 0x03;
m_bg_tilemap->mark_all_dirty();
}
/* bit 2 selects which of the two bitmaps to display (for 2 players game) */
m_show_bitmap = BIT(data,2);
/* bit 3 enables NMI */
m_nmi_mask = BIT(data,3);
//if (!(m_nmi_mask)) m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); // test for later, could this explain the need for 4 NMIs per frame instead of one? Is the game manually retriggering NMI using the mask register, several times during the vblank period?
/* bits 4-5 control ROM bank */
membank("bank1")->set_entry((data & 0x30) >> 4);
}
/***************************************************************************
Display refresh
***************************************************************************/
void hotsmash_state::pbillian_draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect )
{
uint8_t *spriteram = m_spriteram;
int offs;
for (offs = 0; offs < m_spriteram.bytes(); offs += 4)
{
int attr = spriteram[offs + 3];
int code = ((spriteram[offs] & 0xfc) >> 2) + 64 * (attr & 0x0f);
int color = (attr & 0xf0) >> 4;
int sx = spriteram[offs + 1] + 256 * (spriteram[offs] & 0x01);
int sy = spriteram[offs + 2];
if (flip_screen())
{
sx = 240 - sx;
sy = 240 - sy;
}
m_gfxdecode->gfx(1)->transpen(bitmap,cliprect,
code,
color,
flip_screen(), flip_screen(),
sx, sy, 0);
}
}
void superqix_state_base::superqix_draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect)
{
uint8_t *spriteram = m_spriteram;
int offs;
for (offs = 0; offs < m_spriteram.bytes(); offs += 4)
{
int attr = spriteram[offs + 3];
int code = spriteram[offs] + 256 * (attr & 0x01);
int color = (attr & 0xf0) >> 4;
int flipx = attr & 0x04;
int flipy = attr & 0x08;
int sx = spriteram[offs + 1];
int sy = spriteram[offs + 2];
if (flip_screen())
{
sx = 240 - sx;
sy = 240 - sy;
flipx = !flipx;
flipy = !flipy;
}
m_gfxdecode->gfx(2)->transpen(bitmap,cliprect,
code,
color,
flipx, flipy,
sx, sy, 0);
}
}
uint32_t hotsmash_state::screen_update_pbillian(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
pbillian_draw_sprites(bitmap,cliprect);
return 0;
}
uint32_t superqix_state_base::screen_update_superqix(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1, 0);
copybitmap_trans(bitmap,*m_fg_bitmap[m_show_bitmap],flip_screen(),flip_screen(),0,0,cliprect,0);
superqix_draw_sprites(bitmap,cliprect);
m_bg_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0, 0);
return 0;
}