Return to aminmax.c CVS log

Up to [CSRG BSD Unix] / 42BSD / usr.lib / lib2648

Annotation of 42BSD/usr.lib/lib2648/aminmax.c, revision 1.1

1.1     ! root        1: /*     aminmax.c       4.1     83/03/09        */
        !             2: /*
        !             3:  * aminmax: find the 4 edges of the glyph within a window.
        !             4:  * This version is approximate, in that it may include some
        !             5:  * blank areas.  But it's much faster because it doesn't have
        !             6:  * to call mat over and over.
        !             7:  */
        !             8: 
        !             9: #include "bit.h"
        !            10: 
        !            11: aminmax(g, nrow, ncol, rmin, cmin, rmax, cmax)
        !            12: bitmat g;
        !            13: int nrow, ncol;
        !            14: int *rmin, *cmin, *rmax, *cmax;
        !            15: {
        !            16:        register int i, j;
        !            17:        register int nc = (ncol+7)>>3;
        !            18:        register int r1, r2, c1, c2;
        !            19: 
        !            20:        r1 = nrow; c1 = nc; r2 = c2 = 0;
        !            21:        for (i=0; i<nrow; i++)
        !            22:                for (j=0; j<nc; j++)
        !            23:                        if (g[i*nc+j]) {
        !            24:                                r1 = min(r1, i);
        !            25:                                r2 = max(r2, i);
        !            26:                                c1 = min(c1, j);
        !            27:                                c2 = max(c2, j);
        !            28:                        }
        !            29:        if (r2 < r1) {
        !            30:                /* empty glyph! */
        !            31:                r1 = c1 = r2 = c2 = 1;
        !            32:        }
        !            33:        *rmin = r1; *rmax = r2;
        !            34:        *cmin = 8*c1; *cmax = 8*c2+7;
        !            35: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.