Y_OFFSET
offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
offset = Y_OFFSET(pix, image->rect.left, image->rect.top);
u16 last_y = readw(ts->base + Y_OFFSET);