54 lines
900 B
C
54 lines
900 B
C
#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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uchar *p;
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fd = 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(read(fd, hdr, 3*12) != 3*12){
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werrstr("openmemsubfont: header read error: %r");
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goto Err;
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}
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n = atoi(hdr);
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p = malloc(6*(n+1));
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if(p == nil)
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goto Err;
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if(read(fd, p, 6*(n+1)) != 6*(n+1)){
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werrstr("openmemsubfont: fontchar read error: %r");
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goto Err;
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}
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fc = 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, atoi(hdr+12), atoi(hdr+24), fc, i);
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if(sf == nil){
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free(fc);
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goto Err;
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}
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free(p);
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return sf;
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Err:
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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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free(p);
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return nil;
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}
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