home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Programmer Power Tools
/
Programmer Power Tools.iso
/
tex
/
dvivga9.arc
/
CHARPXL.H
< prev
next >
Wrap
Text File
|
1988-05-30
|
2KB
|
56 lines
/* -*-C-*- charpxl.h */
/*-->charpxl*/
/**********************************************************************/
/******************************* charpxl ******************************/
/**********************************************************************/
int
charpxl(c,outfcn) /* return 0 on success, and EOF on failure */
BYTE c; /* current character value */
void (*outfcn)(); /* (possibly NULL) function to output current row */
{
UNSIGN16 i,j; /* loop index */
long p; /* offset into font file */
register UNSIGN32 *q; /* pointer into rasters area */
struct char_entry *tcharptr;/* temporary char_entry pointer */
if ((c < FIRSTPXLCHAR) || (LASTPXLCHAR < c))
{
(void)warning(
"charpxl(): Character value out of range for PXL font file");
return(EOF);
}
tcharptr = &(fontptr->ch[c]);
if (!VISIBLE(tcharptr))
return(0); /* do nothing for empty characters */
p = (long)tcharptr->fontrp; /* font file raster pointer */
if (p < 0L)
{
(void)warning(
"charpxl(): Requested character not found in PXL font file");
return(EOF);
}
if (FSEEK(fontfp,p,0))
{
(void)warning(
"charpxl(): FSEEK() failure for PXL font file character raster");
return(EOF);
}
if (outfcn != (void(*)())NULL)
{
img_words = ((UNSIGN16)(tcharptr->wp) + 31) >> 5;
for (i = 0; i < (UNSIGN16)(tcharptr->hp); ++i)
{
q = img_row;
for (j = 0; j < img_words; ++j)
*q++ = (UNSIGN32)nosignex(fontfp,(BYTE)4);
(void)(*outfcn)(c,i);
}
}
return(0);
}