77f23268f7
An experiment. Change-Id: I40660a211b8372701597d80f7e86917e94cccbaa Reviewed-on: https://plan9port-review.googlesource.com/1161 Reviewed-by: Russ Cox <rsc@swtch.com>
116 lines
1.9 KiB
C
116 lines
1.9 KiB
C
#include <u.h>
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#include <libc.h>
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#include <draw.h>
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extern vlong _drawflength(int);
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int _fontpipe(char*);
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Font*
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openfont(Display *d, char *name)
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{
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Font *fnt;
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int fd, i, n, scale;
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char *buf, *nambuf;
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nambuf = 0;
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scale = 1;
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if('1' <= name[0] && name[0] <= '9' && name[1] == '*') {
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scale = name[0] - '0';
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name += 2;
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}
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fd = open(name, OREAD);
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if(fd < 0 && strncmp(name, "/lib/font/bit/", 14) == 0){
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nambuf = smprint("#9/font/%s", name+14);
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if(nambuf == nil)
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return 0;
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nambuf = unsharp(nambuf);
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if(nambuf == nil)
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return 0;
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if((fd = open(nambuf, OREAD)) < 0){
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free(nambuf);
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return 0;
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}
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name = nambuf;
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}
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if(fd >= 0)
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n = _drawflength(fd);
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if(fd < 0 && strncmp(name, "/mnt/font/", 10) == 0) {
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fd = _fontpipe(name+10);
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n = 8192;
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}
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if(fd < 0)
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return 0;
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buf = malloc(n+1);
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if(buf == 0){
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close(fd);
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free(nambuf);
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return 0;
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}
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i = readn(fd, buf, n);
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close(fd);
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if(i <= 0){
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free(buf);
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free(nambuf);
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return 0;
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}
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buf[i] = 0;
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fnt = buildfont(d, buf, name);
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free(buf);
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free(nambuf);
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if(scale != 1) {
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fnt->scale = scale;
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fnt->height *= scale;
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fnt->ascent *= scale;
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fnt->width *= scale;
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}
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return fnt;
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}
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int
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_fontpipe(char *name)
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{
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int p[2];
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char c;
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char buf[1024], *argv[10];
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int nbuf, pid;
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if(pipe(p) < 0)
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return -1;
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pid = rfork(RFNOWAIT|RFFDG|RFPROC);
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if(pid < 0) {
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close(p[0]);
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close(p[1]);
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return -1;
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}
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if(pid == 0) {
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close(p[0]);
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dup(p[1], 1);
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dup(p[1], 2);
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if(p[1] > 2)
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close(p[1]);
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argv[0] = "fontsrv";
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argv[1] = "-pp";
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argv[2] = name;
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argv[3] = nil;
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execvp("fontsrv", argv);
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print("exec fontsrv: %r\n");
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_exit(0);
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}
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close(p[1]);
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// success marked with leading \001.
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// otherwise an error happened.
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for(nbuf=0; nbuf<sizeof buf-1; nbuf++) {
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if(read(p[0], &c, 1) < 1 || c == '\n') {
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buf[nbuf] = '\0';
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werrstr(buf);
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close(p[0]);
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return -1;
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}
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if(c == '\001')
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break;
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}
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return p[0];
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}
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