projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| e5de0618 RC |
1 | /* minmax.c 4.1 83/03/09 */ |
| 2 | /* | |
| 3 | * minmax: find the 4 edges of the glyph within a window. | |
| 4 | */ | |
| 5 | ||
| 6 | #include "bit.h" | |
| 7 | ||
| 8 | minmax(g, nrow, ncol, rmin, cmin, rmax, cmax) | |
| 9 | bitmat g; | |
| 10 | int nrow, ncol; | |
| 11 | int *rmin, *cmin, *rmax, *cmax; | |
| 12 | { | |
| 13 | register int i, j; | |
| 14 | register int r1, r2, c1, c2; | |
| 15 | int ar1, ar2, ac1, ac2; | |
| 16 | ||
| 17 | aminmax(g, nrow, ncol, &ar1, &ac1, &ar2, &ac2); | |
| 18 | #ifdef TRACE | |
| 19 | if (trace) | |
| 20 | fprintf(trace, "aminmax returns %d, %d, %d, %d\n", ar1, ac1, ar2, ac2); | |
| 21 | #endif | |
| 22 | r1 = nrow; c1 = ncol; r2 = c2 = 0; | |
| 23 | for (i=ar1; i<=ar2; i++) | |
| 24 | for (j=ac1; j<=ac2; j++) | |
| 25 | if (mat(g, nrow, ncol, i, j, 8)) { | |
| 26 | r1 = min(r1, i); | |
| 27 | r2 = max(r2, i); | |
| 28 | c1 = min(c1, j); | |
| 29 | c2 = max(c2, j); | |
| 30 | } | |
| 31 | if (r2 < r1) { | |
| 32 | /* empty glyph! */ | |
| 33 | r1 = c1 = r2 = c2 = 1; | |
| 34 | } | |
| 35 | *rmin = r1; *rmax = r2; | |
| 36 | *cmin = c1; *cmax = c2; | |
| 37 | } |