/*************************************
*
* Main refresh
*
*************************************/
uint32_t screen_update_atarisy2(screen_device screen, bitmap_ind16 bitmap, rectangle cliprect)
{
// start drawing
m_mob.op0.draw_async(cliprect);
// reset priorities
bitmap_ind8 priority_bitmap = screen.priority();
priority_bitmap.fill(0, cliprect);
// draw the playfield
m_playfield_tilemap.op0.tilemap.draw(screen, bitmap, cliprect, 0, 0);
m_playfield_tilemap.op0.tilemap.draw(screen, bitmap, cliprect, 1, 1);
m_playfield_tilemap.op0.tilemap.draw(screen, bitmap, cliprect, 2, 2);
m_playfield_tilemap.op0.tilemap.draw(screen, bitmap, cliprect, 3, 3);
// draw and merge the MO
bitmap_ind16 mobitmap = m_mob.op0.bitmap();
for (sparse_dirty_rect rect = m_mob.op0.first_dirty_rect(cliprect); rect != null; rect = rect.next())
{
for (int y = rect.m_rect.top(); y <= rect.m_rect.bottom(); y++)
{
PointerU16 mo = mobitmap.pix(y); //uint16_t const *const mo = &mobitmap.pix(y);
PointerU16 pf = bitmap.pix(y); //uint16_t *const pf = &bitmap.pix(y);
PointerU8 pri = priority_bitmap.pix(y); //uint8_t const *const pri = &priority_bitmap.pix(y);
for (int x = rect.m_rect.left(); x <= rect.m_rect.right(); x++)
{
if (mo[x] != 0xffff)
{
int mopriority = mo[x] >> atari_motion_objects_device.PRIORITY_SHIFT;
// high priority PF?
if (((mopriority + pri[x]) & 2) != 0)
{
// only gets priority if PF pen is less than 8
if ((pf[x] & 0x08) == 0)
{
pf[x] = (uint16_t)(mo[x] & atari_motion_objects_device.DATA_MASK);
}
}
// low priority
else
{
pf[x] = (uint16_t)(mo[x] & atari_motion_objects_device.DATA_MASK);
}
}
}
}
}
// add the alpha on top
m_alpha_tilemap.op0.tilemap.draw(screen, bitmap, cliprect, 0, 0);
return(0);
}
//bitmap_ind8(uint8_t *base, int width, int height, int rowpixels) : bitmap8_t(k_bitmap_format, base, width, height, rowpixels) { }
public bitmap_ind8(bitmap_ind8 source, rectangle subrect) : base(k_bitmap_format, source, subrect)
{
}