ref: 963cfc9a6f6e721f52aa949e6d1af0c3e8dc2ecc
dir: /sys/src/cmd/tcs/font/qbits.c/
#include <u.h> #include <libc.h> #include <libg.h> #include <bio.h> #include "hdr.h" /* quwei encoding for gb */ Bitmap * qreadbits(char *file, int n, long *chars, int size, uchar *bits, int **doneptr) { Bitmap *bm; Biobuf *bf; char *p; long kmin, kmax; int i, j, byt; int nch; long c; uchar *b; int *done; uchar *nbits; static int dig[256] = { ['0'] 0, ['1'] 1, ['2'] 2, ['3'] 3, ['4'] 4, ['5'] 5, ['6'] 6, ['7'] 7, ['8'] 8, ['9'] 9, ['a'] 10, ['b'] 11, ['c'] 12, ['d'] 13, ['e'] 14, ['f'] 15, }; bf = Bopen(file, OREAD); if(bf == 0){ fprint(2, "%s: %s: %r\n", argv0, file); exits("bitfile open error"); } done = (int *)malloc(n*sizeof(done[0])); if(done == 0){ fprint(2, "%s: malloc error (%d bytes)\n", argv0, n); exits("malloc error"); } *doneptr = done; memset(done, 0, n*sizeof(done[0])); kmin = 65536; kmax = 0; for(i = 0; i < n; i++){ c = chars[i]; if(kmin > c) kmin = c; if(kmax < c) kmax = c; } nch = 0; byt = size/8; while(p = (char *)Brdline(bf, '\n')){ c = (p[0]-'0')*1000 + (p[1]-'0')*100 + (p[2]-'0')*10 + (p[3]-'0'); if((c < kmin) || (c > kmax)) continue; for(i = 0; i < n; i++) if(c == chars[i]){ nch++; done[i] = 1; p += 5; b = bits + i*byt; for(i = 0; i < size; i++){ /* rows */ for(j = 0; j < byt; j++){ *b++ = (dig[*p]<<4) | dig[p[1]]; p += 2; } b += (n-1)*byt; } break; } } nbits = (uchar *)malloc(nch*byt*size); if(nbits == 0){ fprint(2, "%s: malloc error (%d bytes)\n", argv0, nch*byt); exits("malloc error"); } c = 0; for(i = 0; i < n; i++) if(done[i]){ for(j = 0; j < size; j++) memmove(nbits+c*byt+j*nch*byt, bits+i*byt+j*n*byt, byt); c++; } bm = balloc((Rectangle){(Point){0, 0}, (Point){nch*size, size}}, 0); if(bm == 0){ fprint(2, "%s: balloc failure\n", argv0); exits("balloc failure"); } wrbitmap(bm, 0, size, nbits); for(i = 0; i < n; i++) if(done[i] == 0){ /*fprint(2, "char 0x%x (%d) not found\n", chars[i], chars[i]);/**/ } return(bm); }