date and time created 83/03/09 16:22:55 by ralph

SCCS-vsn: old/lib2648/minmax.c 4.1

diff --git a/usr/src/old/lib2648/minmax.c b/usr/src/old/lib2648/minmax.c
new file mode 100644 (file)
index 0000000..bcbfba9
--- /dev/null
+++ b/usr/src/old/lib2648/minmax.c
@@ -0,0 +1,37 @@
+/*     minmax.c        4.1     83/03/09        */
+/*
+ * minmax: find the 4 edges of the glyph within a window.
+ */
+
+#include "bit.h"
+
+minmax(g, nrow, ncol, rmin, cmin, rmax, cmax)
+bitmat g;
+int nrow, ncol;
+int *rmin, *cmin, *rmax, *cmax;
+{
+       register int i, j;
+       register int r1, r2, c1, c2;
+       int ar1, ar2, ac1, ac2;
+
+       aminmax(g, nrow, ncol, &ar1, &ac1, &ar2, &ac2);
+#ifdef TRACE
+       if (trace)
+               fprintf(trace, "aminmax returns %d, %d, %d, %d\n", ar1, ac1, ar2, ac2);
+#endif
+       r1 = nrow; c1 = ncol; r2 = c2 = 0;
+       for (i=ar1; i<=ar2; i++)
+               for (j=ac1; j<=ac2; j++)
+                       if (mat(g, nrow, ncol, i, j, 8)) {
+                               r1 = min(r1, i);
+                               r2 = max(r2, i);
+                               c1 = min(c1, j);
+                               c2 = max(c2, j);
+                       }
+       if (r2 < r1) {
+               /* empty glyph! */
+               r1 = c1 = r2 = c2 = 1;
+       }
+       *rmin = r1; *rmax = r2;
+       *cmin = c1; *cmax = c2;
+}