2730    int btoa[4];  in compare_two_images()  local
2937             btoa[bloc[i]] = aloc[i]; /* may be '4' for alpha */  in compare_two_images()
2960       btoa[3] = btoa[2] = btoa[1] = btoa[0] = 4; /* 4 == not present */  in compare_two_images()
2999                      if (pua[btoa[3]] != pub[3]) break;  in compare_two_images()
3001                      if (pua[btoa[2]] != pub[2]) break;  in compare_two_images()
3003                      if (pua[btoa[1]] != pub[1]) break;  in compare_two_images()
3005                      if (pua[btoa[0]] != pub[0]) break;  in compare_two_images()
3018                      if (psa[btoa[3]] != psb[3]) break;  in compare_two_images()
3020                      if (psa[btoa[2]] != psb[2]) break;  in compare_two_images()
3022                      if (psa[btoa[1]] != psb[1]) break;  in compare_two_images()
3024                      if (psa[btoa[0]] != psb[0]) break;  in compare_two_images()