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tdepim/libkdepim/kxface.cpp

730 lines
15 KiB

/*
This file is part of libkdepim.
Original compface:
Copyright (c) James Ashton - Sydney University - June 1990.
Additions for KDE:
Copyright (c) 2004 Jakob Schröter <js@camaya.net>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "kxface.h"
#include <kdebug.h>
#include <tqbuffer.h>
#include <tqcstring.h>
#include <tqimage.h>
#include <tqregexp.h>
#include <tqstring.h>
#include <tqpainter.h>
#include <stdlib.h>
#include <string.h>
#define GEN(g) F[h] ^= G.g[k]; break
#define BITSPERDIG 4
#define DIGITS (PIXELS / BITSPERDIG)
#define DIGSPERWORD 4
#define WORDSPERLINE (WIDTH / DIGSPERWORD / BITSPERDIG)
/* compressed output uses the full range of printable characters.
* in ascii these are in a contiguous block so we just need to know
* the first and last. The total number of printables is needed too */
#define FIRSTPRINT '!'
#define LASTPRINT '~'
#define NUMPRINTS (LASTPRINT - FIRSTPRINT + 1)
/* output line length for compressed data */
#define MAXLINELEN 78
/* Portable, very large unsigned integer arithmetic is needed.
* Implementation uses arrays of WORDs. COMPs must have at least
* twice as many bits as WORDs to handle intermediate results */
#define COMP unsigned long
#define WORDCARRY (1 << BITSPERWORD)
#define WORDMASK (WORDCARRY - 1)
#define ERR_OK 0 /* successful completion */
#define ERR_EXCESS 1 /* completed OK but some input was ignored */
#define ERR_INSUFF -1 /* insufficient input. Bad face format? */
#define ERR_INTERNAL -2 /* Arithmetic overflow or buffer overflow */
#define BLACK 0
#define GREY 1
#define WHITE 2
#define MAX_XFACE_LENGTH 2048
using namespace KPIM;
KXFace::KXFace()
{
NumProbs = 0;
}
KXFace::~KXFace()
{
}
TQString KXFace::fromImage( const TQImage &image )
{
if( image.isNull() )
return TQString();
TQImage scaledImg = image.smoothScale( 48, 48 );
TQByteArray ba;
TQBuffer buffer( ba );
buffer.open( IO_WriteOnly );
scaledImg.save( &buffer, "XBM" );
TQString xbm( ba );
xbm.remove( 0, xbm.find( "{" ) + 1 );
xbm.truncate( xbm.find( "}" ) );
xbm.remove( " " );
xbm.remove( "," );
xbm.remove( "0x" );
xbm.remove( "\n" );
xbm.truncate( 576 );
TQCString tmp = TQCString( xbm.latin1() );
uint len = tmp.length();
for( uint i=0; i<len; ++i )
{
switch( tmp[i] )
{
case '1': tmp[i] = '8'; break;
case '2': tmp[i] = '4'; break;
case '3': tmp[i] = 'c'; break;
case '4': tmp[i] = '2'; break;
case '5': tmp[i] = 'a'; break;
case '7': tmp[i] = 'e'; break;
case '8': tmp[i] = '1'; break;
case 'A':
case 'a': tmp[i] = '5'; break;
case 'B':
case 'b': tmp[i] = 'd'; break;
case 'C':
case 'c': tmp[i] = '3'; break;
case 'D':
case 'd': tmp[i] = 'b'; break;
case 'E':
case 'e': tmp[i] = '7'; break;
}
if ( i % 2 )
{
char t = tmp[i];
tmp[i] = tmp[i-1];
tmp[i-1] = t;
}
}
tmp.replace( TQRegExp( "(\\w{12})" ), "\\1\n" );
tmp.replace( TQRegExp( "(\\w{4})" ), "0x\\1," );
len = tmp.length();
char *fbuf = (char *)malloc( len + 1 );
strncpy( fbuf, (const char *)tmp, len );
fbuf[len] = '\0';
if ( !( status = setjmp( comp_env ) ) )
{
ReadFace( fbuf );
GenFace();
CompAll( fbuf );
}
TQString ret( fbuf );
free( fbuf );
return ret;
}
TQImage KXFace::toImage(const TQString &xface)
{
if ( xface.length() > MAX_XFACE_LENGTH )
return TQImage();
char *fbuf = (char *)malloc( MAX_XFACE_LENGTH );
memset( fbuf, '\0', MAX_XFACE_LENGTH );
strncpy( fbuf, xface.latin1(), xface.length() );
TQCString img;
if ( !( status = setjmp( comp_env ) ) )
{
UnCompAll( fbuf );/* compress otherwise */
UnGenFace();
img = WriteFace();
}
free( fbuf );
TQImage p;
p.loadFromData( img, "XBM" );
return p;
}
//============================================================================
// more or less original compface 1.4 source
void KXFace::RevPush(const Prob *p)
{
if (NumProbs >= PIXELS * 2 - 1)
longjmp(comp_env, ERR_INTERNAL);
ProbBuf[NumProbs++] = (Prob *) p;
}
void KXFace::BigPush(Prob *p)
{
static unsigned char tmp;
BigDiv(p->p_range, &tmp);
BigMul(0);
BigAdd(tmp + p->p_offset);
}
int KXFace::BigPop(register const Prob *p)
{
static unsigned char tmp;
register int i;
BigDiv(0, &tmp);
i = 0;
while ((tmp < p->p_offset) || (tmp >= p->p_range + p->p_offset))
{
p++;
i++;
}
BigMul(p->p_range);
BigAdd(tmp - p->p_offset);
return i;
}
/* Divide B by a storing the result in B and the remainder in the word
* pointer to by r
*/
void KXFace::BigDiv(register unsigned char a, register unsigned char *r)
{
register int i;
register unsigned char *w;
register COMP c, d;
a &= WORDMASK;
if ((a == 1) || (B.b_words == 0))
{
*r = 0;
return;
}
if (a == 0) /* treat this as a == WORDCARRY */
{ /* and just shift everything right a WORD (unsigned char)*/
i = --B.b_words;
w = B.b_word;
*r = *w;
while (i--)
{
*w = *(w + 1);
w++;
}
*w = 0;
return;
}
w = B.b_word + (i = B.b_words);
c = 0;
while (i--)
{
c <<= BITSPERWORD;
c += (COMP)*--w;
d = c / (COMP)a;
c = c % (COMP)a;
*w = (unsigned char)(d & WORDMASK);
}
*r = c;
if (B.b_word[B.b_words - 1] == 0)
B.b_words--;
}
/* Multiply a by B storing the result in B
*/
void KXFace::BigMul(register unsigned char a)
{
register int i;
register unsigned char *w;
register COMP c;
a &= WORDMASK;
if ((a == 1) || (B.b_words == 0))
return;
if (a == 0) /* treat this as a == WORDCARRY */
{ /* and just shift everything left a WORD (unsigned char) */
if ((i = B.b_words++) >= MAXWORDS - 1)
longjmp(comp_env, ERR_INTERNAL);
w = B.b_word + i;
while (i--)
{
*w = *(w - 1);
w--;
}
*w = 0;
return;
}
i = B.b_words;
w = B.b_word;
c = 0;
while (i--)
{
c += (COMP)*w * (COMP)a;
*(w++) = (unsigned char)(c & WORDMASK);
c >>= BITSPERWORD;
}
if (c)
{
if (B.b_words++ >= MAXWORDS)
longjmp(comp_env, ERR_INTERNAL);
*w = (COMP)(c & WORDMASK);
}
}
/* Add to a to B storing the result in B
*/
void KXFace::BigAdd(unsigned char a)
{
register int i;
register unsigned char *w;
register COMP c;
a &= WORDMASK;
if (a == 0)
return;
i = 0;
w = B.b_word;
c = a;
while ((i < B.b_words) && c)
{
c += (COMP)*w;
*w++ = (unsigned char)(c & WORDMASK);
c >>= BITSPERWORD;
i++;
}
if ((i == B.b_words) && c)
{
if (B.b_words++ >= MAXWORDS)
longjmp(comp_env, ERR_INTERNAL);
*w = (COMP)(c & WORDMASK);
}
}
void KXFace::BigClear()
{
B.b_words = 0;
}
TQCString KXFace::WriteFace()
{
register char *s;
register int i, j, bits, digits, words;
int digsperword = DIGSPERWORD;
int wordsperline = WORDSPERLINE;
TQCString t( "#define noname_width 48\n#define noname_height 48\nstatic char noname_bits[] = {\n " );
j = t.length() - 1;
s = F;
bits = digits = words = i = 0;
t.resize( MAX_XFACE_LENGTH );
digsperword = 2;
wordsperline = 15;
while ( s < F + PIXELS )
{
if ( ( bits == 0 ) && ( digits == 0 ) )
{
t[j++] = '0';
t[j++] = 'x';
}
if ( *(s++) )
i = ( i >> 1 ) | 0x8;
else
i >>= 1;
if ( ++bits == BITSPERDIG )
{
j++;
t[j-( ( digits & 1 ) * 2 )] = *(i + HexDigits);
bits = i = 0;
if ( ++digits == digsperword )
{
if ( s >= F + PIXELS )
break;
t[j++] = ',';
digits = 0;
if ( ++words == wordsperline )
{
t[j++] = '\n';
t[j++] = ' ';
words = 0;
}
}
}
}
t.resize( j + 1 );
t += "};\n";
return t;
}
void KXFace::UnCompAll(char *fbuf)
{
register char *p;
BigClear();
BigRead(fbuf);
p = F;
while (p < F + PIXELS)
*(p++) = 0;
UnCompress(F, 16, 16, 0);
UnCompress(F + 16, 16, 16, 0);
UnCompress(F + 32, 16, 16, 0);
UnCompress(F + WIDTH * 16, 16, 16, 0);
UnCompress(F + WIDTH * 16 + 16, 16, 16, 0);
UnCompress(F + WIDTH * 16 + 32, 16, 16, 0);
UnCompress(F + WIDTH * 32, 16, 16, 0);
UnCompress(F + WIDTH * 32 + 16, 16, 16, 0);
UnCompress(F + WIDTH * 32 + 32, 16, 16, 0);
}
void KXFace::UnCompress(char *f, int wid, int hei, int lev)
{
switch (BigPop(&levels[lev][0]))
{
case WHITE :
return;
case BLACK :
PopGreys(f, wid, hei);
return;
default :
wid /= 2;
hei /= 2;
lev++;
UnCompress(f, wid, hei, lev);
UnCompress(f + wid, wid, hei, lev);
UnCompress(f + hei * WIDTH, wid, hei, lev);
UnCompress(f + wid + hei * WIDTH, wid, hei, lev);
return;
}
}
void KXFace::BigWrite(register char *fbuf)
{
static unsigned char 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 KXFace::BigRead(register char *fbuf)
{
register int c;
while (*fbuf != '\0')
{
c = *(fbuf++);
if ((c < FIRSTPRINT) || (c > LASTPRINT))
continue;
BigMul(NUMPRINTS);
BigAdd((unsigned char)(c - FIRSTPRINT));
}
}
void KXFace::ReadFace(char *fbuf)
{
register int c, i;
register char *s, *t;
t = 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++) = c - '0';
}
else if ((c >= 'A') && (c <= 'F'))
{
if (t >= fbuf + DIGITS)
{
status = ERR_EXCESS;
break;
}
*(t++) = c - 'A' + 10;
}
else if ((c >= 'a') && (c <= 'f'))
{
if (t >= fbuf + DIGITS)
{
status = ERR_EXCESS;
break;
}
*(t++) = c - 'a' + 10;
}
else if (((c == 'x') || (c == 'X')) && (t > fbuf) && (*(t-1) == 0))
t--;
}
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 KXFace::GenFace()
{
static char newp[PIXELS];
register char *f1;
register char *f2;
register int i;
f1 = newp;
f2 = F;
i = PIXELS;
while (i-- > 0)
*(f1++) = *(f2++);
Gen(newp);
}
void KXFace::UnGenFace()
{
Gen(F);
}
// static
void KXFace::Gen(register char *f)
{
register int m, l, k, j, i, h;
for (j = 0; j < HEIGHT; j++)
{
for (i = 0; i < WIDTH; i++)
{
h = i + j * WIDTH;
k = 0;
for (l = i - 2; l <= i + 2; l++)
for (m = j - 2; m <= j; m++)
{
if ((l >= i) && (m == j))
continue;
if ((l > 0) && (l <= WIDTH) && (m > 0))
k = *(f + l + m * WIDTH) ? k * 2 + 1 : k * 2;
}
switch (i)
{
case 1 :
switch (j)
{
case 1 : GEN(g_22);
case 2 : GEN(g_21);
default : GEN(g_20);
}
break;
case 2 :
switch (j)
{
case 1 : GEN(g_12);
case 2 : GEN(g_11);
default : GEN(g_10);
}
break;
case WIDTH - 1 :
switch (j)
{
case 1 : GEN(g_42);
case 2 : GEN(g_41);
default : GEN(g_40);
}
break;
/* i runs from 0 to WIDTH-1, so case can never occur. I leave the code in
because it appears exactly like this in the original compface code.
case WIDTH :
switch (j)
{
case 1 : GEN(g_32);
case 2 : GEN(g_31);
default : GEN(g_30);
}
break;
*/
default :
switch (j)
{
case 1 : GEN(g_02);
case 2 : GEN(g_01);
default : GEN(g_00);
}
break;
}
}
}
}
void KXFace::PopGreys(char *f, int wid, int hei)
{
if (wid > 3)
{
wid /= 2;
hei /= 2;
PopGreys(f, wid, hei);
PopGreys(f + wid, wid, hei);
PopGreys(f + WIDTH * hei, wid, hei);
PopGreys(f + WIDTH * hei + wid, wid, hei);
}
else
{
wid = BigPop(freqs);
if (wid & 1)
*f = 1;
if (wid & 2)
*(f + 1) = 1;
if (wid & 4)
*(f + WIDTH) = 1;
if (wid & 8)
*(f + WIDTH + 1) = 1;
}
}
void KXFace::CompAll(char *fbuf)
{
Compress(F, 16, 16, 0);
Compress(F + 16, 16, 16, 0);
Compress(F + 32, 16, 16, 0);
Compress(F + WIDTH * 16, 16, 16, 0);
Compress(F + WIDTH * 16 + 16, 16, 16, 0);
Compress(F + WIDTH * 16 + 32, 16, 16, 0);
Compress(F + WIDTH * 32, 16, 16, 0);
Compress(F + WIDTH * 32 + 16, 16, 16, 0);
Compress(F + WIDTH * 32 + 32, 16, 16, 0);
BigClear();
while (NumProbs > 0)
BigPush(ProbBuf[--NumProbs]);
BigWrite(fbuf);
}
void KXFace::Compress(register char *f, register int wid, register int hei, register int lev)
{
if (AllWhite(f, wid, hei))
{
RevPush(&levels[lev][WHITE]);
return;
}
if (AllBlack(f, wid, hei))
{
RevPush(&levels[lev][BLACK]);
PushGreys(f, wid, hei);
return;
}
RevPush(&levels[lev][GREY]);
wid /= 2;
hei /= 2;
lev++;
Compress(f, wid, hei, lev);
Compress(f + wid, wid, hei, lev);
Compress(f + hei * WIDTH, wid, hei, lev);
Compress(f + wid + hei * WIDTH, wid, hei, lev);
}
int KXFace::AllWhite(char *f, int wid, int hei)
{
return ((*f == 0) && Same(f, wid, hei));
}
int KXFace::AllBlack(char *f, int wid, int hei)
{
if (wid > 3)
{
wid /= 2;
hei /= 2;
return (AllBlack(f, wid, hei) && AllBlack(f + wid, wid, hei) &&
AllBlack(f + WIDTH * hei, wid, hei) &&
AllBlack(f + WIDTH * hei + wid, wid, hei));
}
else
return (*f || *(f + 1) || *(f + WIDTH) || *(f + WIDTH + 1));
}
int KXFace::Same(register char *f, register int wid, register int hei)
{
register char val, *row;
register int x;
val = *f;
while (hei--)
{
row = f;
x = wid;
while (x--)
if (*(row++) != val)
return(0);
f += WIDTH;
}
return 1;
}
void KXFace::PushGreys(char *f, int wid, int hei)
{
if (wid > 3)
{
wid /= 2;
hei /= 2;
PushGreys(f, wid, hei);
PushGreys(f + wid, wid, hei);
PushGreys(f + WIDTH * hei, wid, hei);
PushGreys(f + WIDTH * hei + wid, wid, hei);
}
else
RevPush(freqs + *f + 2 * *(f + 1) + 4 * *(f + WIDTH) +
8 * *(f + WIDTH + 1));
}
#include "kxface.moc"