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/*
* Compface - 48x48x1 image compression and decompression
*
* Copyright (c) James Ashton - Sydney University - June 1990.
*
* Written 11th November 1989.
*
* Permission is given to distribute these sources, as long as the
* copyright messages are not removed, and no monies are exchanged.
*
* No responsibility is taken for any errors on inaccuracies inherent
* either to the comments or the code of this program, but if reported
* to me, then an attempt will be made to fix them.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "compface.h"
int compface_xbitmap=0;
void
BigRead(fbuf)
register char *fbuf;
{
register int c;
while (*fbuf != '\0')
{
c = *(fbuf++);
if ((c < FIRSTPRINT) || (c > LASTPRINT))
continue;
BigMul(NUMPRINTS);
BigAdd((WORD)(c - FIRSTPRINT));
}
}
void
BigWrite(fbuf)
register char *fbuf;
{
static WORD tmp;
static char buf[DIGITS];
register char *s;
register int i;
s = buf;
while (B.b_words > 0)
{
BigDiv(NUMPRINTS, &tmp);
*(s++) = tmp + FIRSTPRINT;
}
i = 7; /* leave room for the field name on the first line */
*(fbuf++) = ' ';
while (s-- > buf)
{
if (i == 0)
*(fbuf++) = ' ';
*(fbuf++) = *s;
if (++i >= MAXLINELEN)
{
*(fbuf++) = '\n';
i = 0;
}
}
if (i > 0)
*(fbuf++) = '\n';
*(fbuf++) = '\0';
}
void
ReadFace(fbuf)
char *fbuf;
{
register int c, i;
register char *s, *t;
static char table_inv[] = { 0,8,4,12,2,10,6,14,1,9, 5,13, 3,11, 7,15 };
static char table_nop[] = { 0,1,2, 3,4, 5,6, 7,8,9,10,11,12,13,14,15 };
char *table = table_nop; /* optionally invert bits in nibble */
register inc = 0; /* optionally swap nimmles */
int bits;
int len;
t = s = fbuf;
/* Does this look like an X bitmap ? */
if (sscanf(s, "#define %*s %d", &bits) == 1) {
if (bits == 48) {
char type1[256];
char type2[256];
while (*s && *s++ != '\n');
if (sscanf(s, "#define %*s %d", &bits) == 1) if (bits == 48) {
while (*s && *s++ != '\n');
for (len=0; s[len] && s[len]!='\n'; len++);
if (len<255) {
if (sscanf(s, "static %s %s", type1,type2)==2 &&
(!strcmp(type1, "char") ||
!strcmp(type2, "char"))) {
while (*s && *s++ != '\n');
inc = 1;
table = table_inv;
}
else fprintf(stderr, "warning: xbitmap line 3 not static [unsigned] short ...\n");
} else fprintf(stderr, "warning: xbitmap line 3 too long\n");
}
else fprintf(stderr, "warning: xbitmaps must be 48x48\n");
}
else fprintf(stderr, "warning: xbitmaps must be 48x48\n");
}
/* Ensure s is reset if it was not an X bitmap ... */
if (! inc) s = fbuf;
for(i = strlen(s); i > 0; i--)
{
c = (int)*(s++);
if ((c >= '0') && (c <= '9'))
{
if (t >= fbuf + DIGITS)
{
status = ERR_EXCESS;
break;
}
(t++)[inc] = table[c - '0']; inc = - inc;
}
else if ((c >= 'A') && (c <= 'F'))
{
if (t >= fbuf + DIGITS)
{
status = ERR_EXCESS;
break;
}
(t++)[inc] = table[c - 'A' + 10]; inc = - inc;
}
else if ((c >= 'a') && (c <= 'f'))
{
if (t >= fbuf + DIGITS)
{
status = ERR_EXCESS;
break;
}
(t++)[inc] = table[c - 'a' + 10]; inc = - inc;
}
else if (((c == 'x') || (c == 'X')) && (t > fbuf) &&
((t-1)[-inc] == table[0])) { t--; inc = -inc; }
}
if (t < fbuf + DIGITS)
longjmp(comp_env, ERR_INSUFF);
s = fbuf;
t = F;
c = 1 << (BITSPERDIG - 1);
while (t < F + PIXELS)
{
*(t++) = (*s & c) ? 1 : 0;
if ((c >>= 1) == 0)
{
s++;
c = 1 << (BITSPERDIG - 1);
}
}
}
void
WriteFace(fbuf)
char *fbuf;
{
register char *s, *t;
register int i, bits, digits, words;
int digsperword = DIGSPERWORD;
int wordsperline = WORDSPERLINE;
s = F;
t = fbuf;
bits = digits = words = i = 0;
if (compface_xbitmap) {
sprintf(t,"#define noname_width 48\n#define noname_height 48\nstatic char noname_bits[] = {\n ");
while (*t) t++;
digsperword = 2;
wordsperline = 15;
}
while (s < F + PIXELS)
{
if ((bits == 0) && (digits == 0))
{
*(t++) = '0';
*(t++) = 'x';
}
if (compface_xbitmap) {
if (*(s++))
i = (i >> 1) | 0x8;
else
i >>= 1;
}
else {
if (*(s++))
i = i * 2 + 1;
else
i *= 2;
}
if (++bits == BITSPERDIG)
{
if (compface_xbitmap) {
t++;
t[-(digits & 1) * 2] = *(i + HexDigits);
}
else *(t++) = *(i + HexDigits);
bits = i = 0;
if (++digits == digsperword)
{
if (compface_xbitmap && (s >= F + PIXELS))
break;
*(t++) = ',';
digits = 0;
if (++words == wordsperline)
{
*(t++) = '\n';
if (compface_xbitmap) *(t++) = ' ';
words = 0;
}
}
}
}
if (compface_xbitmap) {
sprintf(t, "};\n");
while (*t) t++;
}
*(t++) = '\0';
}
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