4.3BSD/usr/contrib/X/libsun/font.c
#ifdef sun
/*
* The Sun X drivers are a product of Sun Microsystems, Inc. and are provided
* for unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify these drivers without charge, but are not authorized
* to license or distribute them to anyone else except as part of a product or
* program developed by the user.
*
* THE SUN X DRIVERS ARE PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND
* INCLUDING THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A
* PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE
* PRACTICE.
*
* The Sun X Drivers are provided with no support and without any obligation
* on the part of Sun Microsystems, Inc. to assist in their use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THE SUN X
* DRIVERS OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#ifndef lint
static char sccsid[] = "@(#)font.c 2.1 86/01/28 Copyright 1986 Sun Micro";
#endif
/*-
* Copyright 1985, Massachusetts Institute of Technology
* Copyright (c) 1986 by Sun Microsystems, Inc.
*/
/* font.c Reads a font from a file and stores it on the workstation
*
* GetFont Takes a font name and stores it
* FreeFont Frees the storage taken by a font
*
*/
/*
* ToDo:
* Use Sun fonts too
*/
#include "Xsun.h"
#include "vssite.h"
#include "../libvs100/param.h"
#include <errno.h>
extern int errno;
char *Xalloc(), *strcpy(), *strcat();
long lseek();
#define CHARPERFONT 256
static short ReverseBitsInByte[256] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
};
#define ReverseBitsInShort(s) ((ReverseBitsInByte[(unsigned char)(s)]<<8)|ReverseBitsInByte[(unsigned char)((s)>>8)])
/*
* this routine converts strike format into Sun font format
* XXX - it's embarrasingly slow, but I'm in too much of a hurry
* to do anything better for now. The font stuff is for the deep
* six anyway..... (DSHR).
*/
struct pixfont *
striketopixfont(fn)
FONT *fn;
{
register FontPriv *fp = (FontPriv *)fn->data;
register struct pixfont *pf;
register int fheight = fn->height;
register int i, j;
((struct pixfont *)fn->data) = pf = (struct pixfont *) Xalloc(sizeof(struct pixfont));
if (pf != NULL) {
extern struct pixrectops mem_ops;
static struct mpr_data mprd;
static struct pixrect spr = {&mem_ops,2000,1000,1,(caddr_t)&mprd};
{ register short *sh = (short *) fp->fltable[0];
register short limit = (fp->wpitch>>1)*fheight;
do *sh = ReverseBitsInShort(*sh), sh++;
while (--limit != -1);
}
mprd.md_linebytes = fp->wpitch;
mprd.md_image = (short *) fp->fltable[0];
bzero((caddr_t) pf, sizeof(struct pixfont));
pf->pf_defaultsize.y = fheight;
if (fn->fixed)
pf->pf_defaultsize.x = fn->avg_width;
for (i = fn->first; i <= fn->last; i++) {
register w = fp->widths[i];
#ifdef undef
register offset = fp->leftarray[i];
#endif
register struct pixchar *pc = &(pf->pf_char[i]);
if (w < 0)
continue; /* Sanity check */
pc->pc_pr = mem_create(w, fheight, 1);
pc->pc_home.x = 0;
pc->pc_home.y = fheight - fn->base;
pc->pc_adv.x = w;
pc->pc_adv.y = 0;
pr_rop(pc->pc_pr,0,0,w,fheight,PIX_SRC,
&spr, fp->leftarray[i], 0);
#ifdef undef
for (j = 0; j < fheight; j++) {
register int k;
for (k = 0; k < w; k++) {
int bit;
bit = (*((u_short *)fp->fltable[j] + ((offset+k) >> 4)));
bit >>= ((offset + k) % 16);
bit &= 1;
pr_put(pc->pc_pr, k, j, bit);
}
}
#endif
}
}
free((caddr_t) fp);
return ((struct pixfont *)fn->data);
}
FONT *GetFont (name)
char *name;
{
char fontname[256];
int fontfile = -1;
FontData font;
#define chars ((BitMap *) font.f_characters)
int fontsize, leftsize, width, i, j;
char *fontarea;
register short *leftarea, *leftarray;
register FONT *fd;
register FontPriv *fpriv;
int tablesize = (CHARPERFONT + 1) * sizeof(short);
extern char *getenv(), *index();
static char *Fontpath = NULL;
char *fontpath;
if (!Fontpath) {
char *temp = getenv("XFONTPATH");
if (temp) {
Fontpath = Xalloc(strlen(temp) + 1);
strcpy(Fontpath, temp);
}
}
if ((fontpath = Fontpath) == NULL)
fontpath = DEFAULT_FONT_PATH;
fontfile = open (name, 0, 0);
while (fontfile < 0) {
char *fend;
if ((fend = index(fontpath, ':')) != 0)
*fend = '\0';
if (*fontpath == '\0') {
errno = EINVAL;
return (NULL);
}
if (*fontpath == '~') {
/* XXX - should implement ~foobar as well */
strcpy (fontname, getenv("HOME"));
strcat (fontname, "/");
fontpath++;
} else
*fontname = '\0';
strcat (fontname, fontpath);
strcat (fontname, "/");
strcat (fontname, name);
strcat (fontname, DEFAULT_FONT_SUFFIX);
fontfile = open (fontname, 0, 0);
if (fend) {
*fend = ':';
fontpath = ++fend;
} else
break;
}
if (read (fontfile, (caddr_t) &font, sizeof (FontData)) != sizeof (FontData)) {
close (fontfile);
errno = EINVAL;
return (NULL);
}
Swap_shorts((short *) &font, sizeof (FontData)>>1);
fontsize = BitmapSize(chars->bm_width, chars->bm_height);
fontarea = (char *) Xalloc (fontsize);
lseek (fontfile, (long) font.f_characters[0], 0);
if (read (fontfile, fontarea, fontsize) != fontsize) {
close (fontfile);
free (fontarea);
errno = EINVAL;
return (NULL);
}
Swap_shorts((short *)fontarea, fontsize>>1);
leftarea = (short *) Xalloc (tablesize);
bzero(leftarea, tablesize);
leftarray = (short *) Xalloc (tablesize);
if (font.f_fixedWidth == 0) {
leftsize = (font.f_lastChar - font.f_firstChar + 2) * sizeof (short);
lseek (fontfile, (long) font.f_leftArray[0], 0);
if (read (fontfile, & leftarea[font.f_firstChar], leftsize)
!= leftsize) {
close (fontfile);
free (fontarea);
free ((caddr_t) leftarea);
free ((caddr_t) leftarray);
errno = EINVAL;
return (NULL);
}
Swap_shorts(((short *)& leftarea[font.f_firstChar]), leftsize>>1);
} else { /* if fixed with font, generate leftarray for use later */
j = 0;
for (i = font.f_firstChar; i <= font.f_lastChar + 1; i++) {
leftarea[i] = j;
j += font.f_fixedWidth;
}
}
bcopy(leftarea, leftarray, tablesize);
close (fontfile);
fd = (FONT *) Xalloc (sizeof (FONT));
fd->height = chars->bm_height;
fd->first = font.f_firstChar;
fd->last = font.f_lastChar;
fd->base = font.f_baseline;
fd->space = font.f_spaceIndex;
fd->space += fd->first;
fpriv = (FontPriv *) Xalloc (sizeof (FontPriv));
if (fd->avg_width = font.f_fixedWidth) {
fd->fixed = 1;
fpriv->maxwidth = fd->avg_width;
}
else
fd->fixed = 0;
fd->refcnt = 1;
fd->data = (caddr_t) fpriv;
fpriv->widths = leftarea;
fpriv->leftarray = leftarray;
if ((fpriv->strike = (BITMAP *) Xalloc(sizeof(BITMAP))) == NULL) {
free (fontarea);
free ((caddr_t) leftarea);
free ((caddr_t) leftarray);
free ((caddr_t) fd);
free ((caddr_t) fpriv);
errno = EINVAL;
return (NULL);
}
fpriv->wpitch = (((chars->bm_width + 15) >> 3) & ~1);
fpriv->strike->width = chars->bm_width;
fpriv->strike->height = chars->bm_height;
fpriv->strike->refcnt = 1;
fpriv->strike->data = (caddr_t) fontarea;
/*
* compute line table for font to eliminate multiply to find beginning
* of line.
*/
fpriv->fltable = (char **)Xalloc(chars->bm_height * sizeof(caddr_t));
for (i = 0; i < chars->bm_height; i++)
fpriv->fltable[i] = ((caddr_t) fontarea) + i * fpriv->wpitch;
fd->name = (char *) Xalloc (strlen (name) + 1);
strcpy (fd->name, name);
fpriv->maxwidth = 0;
/* convert the leftarray to the width table */
for (i = fd->first; i <= fd->last; i++) {
width = fpriv->leftarray[i + 1] - fpriv->leftarray[i];
if (width > fpriv->maxwidth) fpriv->maxwidth = width;
if (width < 0) {
width = 0; /* font sanity check */
#ifdef notdef
DeviceError ("Bad font leftarray!\n");
#else
errno = EINVAL;
return(NULL);
#endif
}
fpriv->widths[i] = width;
}
fd->avg_width = ((fpriv->leftarray[fd->last] -
fpriv->leftarray[fd->first]) / (fd->last - fd->first));
striketopixfont(fd);
return (fd);
#undef chars
}
FreeFont (font)
register FONT *font;
{
free ((caddr_t) font->data);
free (font->name);
free ((caddr_t) font);
}
#endif sun