578    GLshort alphadist;  in encodedxt5alpha()  local
636             alphadist = srccolors[j][i][3] - alphause[1];  in encodedxt5alpha()
640             alphadist = srccolors[j][i][3] - (alphause[1] * 6 + alphause[0] * 1) / 7;  in encodedxt5alpha()
644             alphadist = srccolors[j][i][3] - (alphause[1] * 5 + alphause[0] * 2) / 7;  in encodedxt5alpha()
648             alphadist = srccolors[j][i][3] - (alphause[1] * 4 + alphause[0] * 3) / 7;  in encodedxt5alpha()
652             alphadist = srccolors[j][i][3] - (alphause[1] * 3 + alphause[0] * 4) / 7;  in encodedxt5alpha()
656             alphadist = srccolors[j][i][3] - (alphause[1] * 2 + alphause[0] * 5) / 7;  in encodedxt5alpha()
660             alphadist = srccolors[j][i][3] - (alphause[1] * 1 + alphause[0] * 6) / 7;  in encodedxt5alpha()
664             alphadist = srccolors[j][i][3] - alphause[0];  in encodedxt5alpha()
666          alphablockerror1 += alphadist * alphadist;  in encodedxt5alpha()
701                alphadist = 0;  in encodedxt5alpha()
705                alphadist = 0;  in encodedxt5alpha()
709                alphadist = srccolors[j][i][3] - alphabase[0];  in encodedxt5alpha()
713                alphadist = srccolors[j][i][3] - (alphabase[0] * 4 + alphabase[1] * 1) / 5;  in encodedxt5alpha()
717                alphadist = srccolors[j][i][3] - (alphabase[0] * 3 + alphabase[1] * 2) / 5;  in encodedxt5alpha()
721                alphadist = srccolors[j][i][3] - (alphabase[0] * 2 + alphabase[1] * 3) / 5;  in encodedxt5alpha()
725                alphadist = srccolors[j][i][3] - (alphabase[0] * 1 + alphabase[1] * 4) / 5;  in encodedxt5alpha()
729                alphadist = srccolors[j][i][3] - alphabase[1];  in encodedxt5alpha()
731             alphablockerror2 += alphadist * alphadist;  in encodedxt5alpha()
840                   alphadist = srccolors[j][i][3];  in encodedxt5alpha()
844                   alphadist = 255 - srccolors[j][i][3];  in encodedxt5alpha()
848                   alphadist = srccolors[j][i][3] - alphatest[0];  in encodedxt5alpha()
852                  alphadist = srccolors[j][i][3] - (alphatest[0] * 4 + alphatest[1] * 1) / 5;  in encodedxt5alpha()
856                   alphadist = srccolors[j][i][3] - (alphatest[0] * 3 + alphatest[1] * 2) / 5;  in encodedxt5alpha()
860                   alphadist = srccolors[j][i][3] - (alphatest[0] * 2 + alphatest[1] * 3) / 5;  in encodedxt5alpha()
864                   alphadist = srccolors[j][i][3] - (alphatest[0] * 1 + alphatest[1] * 4) / 5;  in encodedxt5alpha()
868                   alphadist = srccolors[j][i][3] - alphatest[1];  in encodedxt5alpha()
870                alphablockerror3 += alphadist * alphadist;  in encodedxt5alpha()