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// license:BSD-3-Clause
// copyright-holders:Phil Stroffolino, Carlos A. Lozano, Rob Rosenbrock
/***************************************************************************
Renegade Video Hardware
***************************************************************************/
#include "emu.h"
#include "includes/renegade.h"
WRITE8_MEMBER(renegade_state::bg_videoram_w)
{
m_bg_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset & 0x3ff);
}
WRITE8_MEMBER(renegade_state::fg_videoram_w)
{
m_fg_videoram[offset] = data;
m_fg_tilemap->mark_tile_dirty(offset & 0x3ff);
}
WRITE8_MEMBER(renegade_state::flipscreen_w)
{
flip_screen_set(~data & 0x01);
}
WRITE8_MEMBER(renegade_state::scroll_lsb_w)
{
m_scrollx = (m_scrollx & 0xff00) | data;
}
WRITE8_MEMBER(renegade_state::scroll_msb_w)
{
m_scrollx = (m_scrollx & 0xff) | (data << 8);
}
TILE_GET_INFO_MEMBER(renegade_state::get_bg_tilemap_info)
{
const uint8_t *source = &m_bg_videoram[tile_index];
uint8_t attributes = source[0x400]; /* CCC??BBB */
SET_TILE_INFO_MEMBER(1 + (attributes & 0x7),
source[0],
attributes >> 5,
0);
}
TILE_GET_INFO_MEMBER(renegade_state::get_fg_tilemap_info)
{
const uint8_t *source = &m_fg_videoram[tile_index];
uint8_t attributes = source[0x400];
SET_TILE_INFO_MEMBER(0,
((attributes & 3) << 8) | source[0],
attributes >> 6,
0);
}
void renegade_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(renegade_state::get_bg_tilemap_info),this), TILEMAP_SCAN_ROWS, 16, 16, 64, 16);
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(renegade_state::get_fg_tilemap_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
m_fg_tilemap->set_transparent_pen(0);
m_bg_tilemap->set_scrolldx(256, 0);
save_item(NAME(m_scrollx));
}
void renegade_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect)
{
uint8_t *source = m_spriteram;
uint8_t *finish = source + 96 * 4;
while (source < finish)
{
int sy = 240 - source[0];
if (sy >= 16)
{
int attributes = source[1]; /* SFCCBBBB */
int sx = source[3];
int sprite_number = source[2];
int sprite_bank = 9 + (attributes & 0xf);
int color = (attributes >> 4) & 0x3;
int xflip = attributes & 0x40;
if (sx > 248)
sx -= 256;
if (flip_screen())
{
sx = 240 - sx;
sy = 240 - sy;
xflip = !xflip;
}
if (attributes & 0x80) /* big sprite */
{
m_gfxdecode->gfx(sprite_bank)->transpen(bitmap,cliprect,
sprite_number | 1,
color,
xflip, flip_screen(),
sx, sy + (flip_screen() ? -16 : 16), 0);
}
else
{
sy += (flip_screen() ? -16 : 16);
}
m_gfxdecode->gfx(sprite_bank)->transpen(bitmap,cliprect,
sprite_number,
color,
xflip, flip_screen(),
sx, sy, 0);
}
source += 4;
}
}
uint32_t renegade_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->set_scrollx(0, m_scrollx);
m_bg_tilemap->draw(screen, bitmap, cliprect, 0 , 0);
draw_sprites(bitmap, cliprect);
m_fg_tilemap->draw(screen, bitmap, cliprect, 0 , 0);
return 0;
}
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