UINT32 tutankhm_state::screen_update_tutankhm(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
int xorx = m_flip_x ? 255 : 0;
int xory = m_flip_y ? 255 : 0;
pen_t pens[NUM_PENS];
int x, y;
get_pens(machine(), pens);
for (y = cliprect.min_y; y <= cliprect.max_y; y++)
{
UINT32 *dst = &bitmap.pix32(y);
for (x = cliprect.min_x; x <= cliprect.max_x; x++)
{
UINT8 effx = x ^ xorx;
UINT8 yscroll = (effx < 192) ? *m_scroll : 0;
UINT8 effy = (y ^ xory) + yscroll;
UINT8 vrambyte = m_videoram[effy * 128 + effx / 2];
UINT8 shifted = vrambyte >> (4 * (effx % 2));
dst[x] = pens[shifted & 0x0f];
}
}
return 0;
}
static MC6845_BEGIN_UPDATE( begin_update )
{
tapatune_state *state = device->machine().driver_data<tapatune_state>();
/* create the pens */
get_pens(state);
return state->m_pens;
}
