#define ac_mask_width 16
#define ac_mask_height 16
static unsigned char ac_mask_bits[] = {
   0xc0, 0x03, 0xc0, 0x03, 0xe0, 0x07, 0xf0, 0x0f, 0xe8, 0x17, 0xdc, 0x3b,
   0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdc, 0x3b, 0xe8, 0x17,
   0xf0, 0x0f, 0xe0, 0x07, 0xc0, 0x03, 0xc0, 0x03};
