63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <memdraw.h>
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Memsubfont*
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openmemsubfont(char *name)
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{
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Memsubfont *sf;
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Memimage *i;
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Fontchar *fc;
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int fd, n;
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char hdr[3*12+4+1];
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uint8_t *p;
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fd = sys_open(name, OREAD);
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if(fd < 0)
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return nil;
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p = nil;
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i = readmemimage(fd);
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if(i == nil)
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goto Err;
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if(jehanne_read(fd, hdr, 3*12) != 3*12){
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jehanne_werrstr("openmemsubfont: header read error: %r");
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goto Err;
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}
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n = jehanne_atoi(hdr);
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p = jehanne_malloc(6*(n+1));
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if(p == nil)
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goto Err;
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if(jehanne_read(fd, p, 6*(n+1)) != 6*(n+1)){
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jehanne_werrstr("openmemsubfont: fontchar read error: %r");
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goto Err;
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}
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fc = jehanne_malloc(sizeof(Fontchar)*(n+1));
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if(fc == nil)
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goto Err;
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_unpackinfo(fc, p, n);
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sf = allocmemsubfont(name, n, jehanne_atoi(hdr+12), jehanne_atoi(hdr+24), fc, i);
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if(sf == nil){
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jehanne_free(fc);
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goto Err;
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}
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jehanne_free(p);
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return sf;
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Err:
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sys_close(fd);
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if (i != nil)
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freememimage(i);
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if (p != nil)
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jehanne_free(p);
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return nil;
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}
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