int scroll = MIN_SCROLL + (MAX_SCROLL - MIN_SCROLL) * mouse_x / fb_width;
unsigned short *dst = backBuffer + PIXEL_PADDING;
unsigned short *src = background + scroll;
int scroll = MIN_SCROLL + (MAX_SCROLL - MIN_SCROLL) * mouse_x / fb_width;
unsigned short *dst = backBuffer + PIXEL_PADDING;
unsigned short *src = background + scroll;