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/***************************************************************************
Atari Basketball hardware
***************************************************************************/
#include "emu.h"
#include "includes/bsktball.h"
WRITE8_MEMBER(bsktball_state::bsktball_videoram_w)
{
m_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
static TILE_GET_INFO( get_bg_tile_info )
{
bsktball_state *state = machine.driver_data<bsktball_state>();
int attr = state->m_videoram[tile_index];
int code = ((attr & 0x0f) << 2) | ((attr & 0x30) >> 4);
int color = (attr & 0x40) >> 6;
int flags = (attr & 0x80) ? TILE_FLIPX : 0;
SET_TILE_INFO(0, code, color, flags);
}
VIDEO_START( bsktball )
{
bsktball_state *state = machine.driver_data<bsktball_state>();
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
}
static void draw_sprites( running_machine &machine, bitmap_ind16 &bitmap, const rectangle &cliprect )
{
bsktball_state *state = machine.driver_data<bsktball_state>();
int mot;
for (mot = 0; mot < 16; mot++)
{
int pic = state->m_motion[mot * 4];
int sy = 28 * 8 - state->m_motion[mot * 4 + 1];
int sx = state->m_motion[mot * 4 + 2];
int color = state->m_motion[mot * 4 + 3];
int flipx = (pic & 0x80) >> 7;
pic = (pic & 0x3f);
color = (color & 0x3f);
drawgfx_transpen(bitmap, cliprect, machine.gfx[1], pic, color, flipx, 0, sx, sy, 0);
}
}
SCREEN_UPDATE_IND16( bsktball )
{
bsktball_state *state = screen.machine().driver_data<bsktball_state>();
state->m_bg_tilemap->draw(bitmap, cliprect, 0, 0);
draw_sprites(screen.machine(), bitmap, cliprect);
return 0;
}
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