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/*
* in_xpm.cpp -- read an XPM file
* by pts@math.bme.hu at Fri Mar 1 09:56:54 CET 2002
*/
/* Imp: test this code with various xpm files! */
#ifdef __GNUC__
#pragma implementation
#endif
#include "image.hpp"
#if USE_IN_XPM
#if OBJDEP
# warning REQUIRES: mapping.o
#endif
#ifndef USE_BIG_MEMORY
#define USE_BIG_MEMORY 0
#endif
#include "mapping.hpp"
#include "error.hpp"
#include "xpmc.h"
#include <string.h> /* memchr() */
#include "gensio.hpp"
#define USGE(a,b) ((unsigned char)(a))>=((unsigned char)(b))
#if 0
/** @return true iff params are different strings (not respecting case) */
static int my_strcase_neq(char *s1, char *s2) {
while ((USGE(*s1,'A') && USGE('Z',*s1) ? *s1+'a'-'A' : *s1) ==
(USGE(*s2,'A') && USGE('Z',*s2) ? *s2+'a'-'A' : *s2)) {
if (*s1=='\0') return 0;
s1++; s2++;
}
return 1;
}
#endif
#define my_strcase_neq(s1,s2) GenBuffer::nocase_strcmp(s1,s2)
/** @ return RGB long */
static Image::Sampled::rgb_t parse_rgb(char const*s) {
unsigned v=0, len;
Image::Sampled::rgb_t ret;
if (!s || !*s) return 0x2000000; /* not found */
// fprintf(stderr, "'%s'\n", s);
if (*s=='#') { /* an #RRGGBB web-style color spec; or #RRRRGGGGBBBB */
unsigned dif=0;
++s;
while (dif<13 && (USGE(5,(s[dif]|32)-'a') || USGE(9,s[dif]-'0'))) dif++; /* find at most 13 hex digits */
if (s[dif]!='\0' || (dif!=12 && dif!=6)) return 0x2000000; /* not found, spec length error */
dif=(dif==12) ? 3 : 1;
// shr=24; while (shr!=0) {
ret= (Image::Sampled::rgb_t)( USGE(9,*s-'0') ? *s-'0' : 10+(*s|32)-'a' )<<20;
s++;
ret|=(Image::Sampled::rgb_t)( USGE(9,*s-'0') ? *s-'0' : 10+(*s|32)-'a' )<<16;
s+=dif; /* ignore lower two hex digits of 16-bit sample value */
ret|=(Image::Sampled::rgb_t)( USGE(9,*s-'0') ? *s-'0' : 10+(*s|32)-'a' )<<12;
s++;
ret|=(Image::Sampled::rgb_t)( USGE(9,*s-'0') ? *s-'0' : 10+(*s|32)-'a' )<<8;
s+=dif; /* ignore lower two hex digits of 16-bit sample value */
ret|=(Image::Sampled::rgb_t)( USGE(9,*s-'0') ? *s-'0' : 10+(*s|32)-'a' )<<4;
s++;
ret|=(Image::Sampled::rgb_t)( USGE(9,*s-'0') ? *s-'0' : 10+(*s|32)-'a' );
return ret;
}
/* vvv 223==255-32: ignore case when hashing */
char const *p=s;
while (*p!='\0') v=xpmColors_mul*v+(223&*(unsigned char const*)p++);
p=xpmColors_dat+xpmColors_ofs[(v&65535)%xpmColors_mod];
while (*p!='\0') {
len=strlen(p);
if (0==my_strcase_neq(p,s)) {
p+=len;
ret=(((Image::Sampled::rgb_t)((unsigned char const*)p)[1])<<16)+
(((Image::Sampled::rgb_t)((unsigned char const*)p)[2])<<8)+
(((Image::Sampled::rgb_t)((unsigned char const*)p)[3]));
return (ret==0x30201) ? 0x1000000 : ret; /* transparent color */
}
p+=len+4;
}
return 0x2000000; /* not found */
}
class XPMTok {
public:
/* Imp: report line numbers on errors */
BEGIN_STATIC_ENUM1(int)
T_NO_UNGOT=-1,
T_COMMA=257 /* The comma token, outside strings. */
END_STATIC_ENUM()
/* XPM states */
BEGIN_STATIC_ENUM1(char)
ST_OUT=0, /* outside s string */
ST_STR=1, /* inside a string */
ST_EOF=2 /* EOF */
END_STATIC_ENUM()
int getcc();
/** Reads an unsigned int. */
Image::Sampled::dimen_t getDimen();
Image::Sampled::rgb_t getColor();
void read(char *buf, unsigned len);
inline void readInStr(char *buf, unsigned len);
inline XPMTok(FILE *f_): f(f_), state(ST_OUT), ungot(T_NO_UNGOT) {}
inline void ungetcc(int c) { if (c>=0) ungot=c; }
void getComma();
protected:
FILE *f;
/** Current state. */
char state;
int ungot;
};
int XPMTok::getcc() {
int i;
if (ungot>=0 /*T_NO_UNGOT<0*/) { i=ungot; ungot=T_NO_UNGOT; return i; }
/* Imp: ignore C and C++ style comments (so we won't recognise strings inside comments) */
switch (state) {
case ST_OUT: st_out:
while (1) {
switch ((i=MACRO_GETC(f))) {
case -1: state=ST_EOF; return -1;
case ',': return T_COMMA;
case '"': state=ST_STR; goto st_str;
default: /* ignore outside strings */ break;
}
}
case ST_STR: st_str:
i=MACRO_GETC(f);
if (i==-1) { ue: Error::sev(Error::EERROR) << "XPM: unexpected EOF" << (Error*)0; }
else if (i=='"') { state=ST_OUT; goto st_out; }
else if (i=='\\') {
if ((i=MACRO_GETC(f))==-1) goto ue;
if (i=='\n') goto st_str;
/* Imp: handle octal, hexadecimal, \n etc. */
}
return i&255;
default: return -1;
}
}
Image::Sampled::dimen_t XPMTok::getDimen() {
Image::Sampled::dimen_t ret=0, bak;
int i;
while ((i=getcc())==' ' || i=='\t') ;
if (USGE(i,'0') && USGE('9',i)) {
ret=i-'0';
while (USGE((i=getcc()),'0') && USGE('9',i)) {
bak=ret;
ret=ret*10+(i-'0');
if (ret/10!=bak) Error::sev(Error::EERROR) << "XPM: dimen overflow" << (Error*)0;
}
ungetcc(i);
return ret;
} else Error::sev(Error::EERROR) << "XPM: dimen expected" << (Error*)0;
return 0; /*notreached*/
}
void XPMTok::getComma() {
if (getcc()!=T_COMMA) Error::sev(Error::EERROR) << "XPM: comma expected at " << ftell(f) << (Error*)0;
}
void XPMTok::read(char *buf, unsigned len) {
int i;
while (len--!=0) {
i=getcc();
// fprintf(stderr,"i=%d\n", i);
if (i>=0 && i<=255) *buf++=i; else Error::sev(Error::EERROR) << "XPM: data expected" << (Error*)0;
}
}
void XPMTok::readInStr(char *buf, unsigned len) {
/* Dat: this is OK noew */
// assert(state==ST_STR);
assert(ungot<0);
param_assert(len>=1);
if (state!=ST_STR) { len--; goto real; }
int i;
while (len--!=0) {
if ((i=MACRO_GETC(f))>=0 && i<=255 && i!='"' && i!='\\') *buf++=i;
else { assert(i>=0); ungetc(i,f); real:
i=getcc();
// fprintf(stderr,"i=%d\n", i);
if (i>=0 && i<=255) *buf++=i; else Error::sev(Error::EERROR) << "XPM: data expected" << (Error*)0;
}
}
}
Image::Sampled::rgb_t XPMTok::getColor() {
static char tmp[32];
int i;
while ((i=getcc())==' ' || i=='\t') ;
if (i=='g') { at_g:
i=getcc();
if (i!='4') ungetcc(i);
goto at_col;
} else if (i=='c' || i=='m' || i=='b' || i=='s') { at_col:
while ((i=getcc())==' ' || i=='\t') ;
char *p=tmp, *pend=tmp+sizeof(tmp)-1;
while (i>=33 && i<=126) {
if (p==pend) goto cexp; /* color name too long */
*p++=i;
i=getcc();
}
*p='\0';
if (i==' ' || i=='\t') { /* Maybe another color will come */
while ((i=getcc())==' ' || i=='\t') ;
if (i=='g') goto at_g;
else if (i=='c' || i=='m' || i=='b' || i=='s') goto at_col;
}
if (i!=T_COMMA) goto cexp;
Image::Sampled::rgb_t ret=parse_rgb(tmp);
if (ret==0x2000000) Error::sev(Error::EERROR) << "XPM: unknown color: " << tmp << (Error*)0;
return ret;
} else { cexp: Error::sev(Error::EERROR) << "XPM: color expected" << (Error*)0; }
return 0; /*notreached*/
}
static Image::Sampled *in_xpm_reader(Image::Loader::UFD *ufd, SimBuffer::Flat const&) {
// Error::sev(Error::EERROR) << "Cannot load XPM images yet." << (Error*)0;
XPMTok tok(((Filter::UngetFILED*)ufd)->getFILE(/*seekable:*/false));
Image::Sampled::dimen_t wd=tok.getDimen();
Image::Sampled::dimen_t ht=tok.getDimen();
Image::Sampled::dimen_t colors=tok.getDimen();
Image::Sampled::dimen_t cpp=tok.getDimen(); /* chars per pixel */
/* width height ncolors cpp [x_hot y_hot] */
int i; /* multiple purpose */
while ((i=tok.getcc())==' ' || i=='\t' || USGE(9,i-'0')) ;
tok.ungetcc(i); tok.getComma();
// Error::sev(Error::DEBUG) << "wd="<<wd<<" ht="<<ht<<" colors="<<colors<<" cpp="<<cpp << (Error*)0;
if (1UL*cpp*colors>65535) Error::sev(Error::EERROR) << "XPM: too many colors" << (Error*)0;
// if (cpp==1) {
// }
Image::Sampled::dimen_t transp=colors; /* No transparent colors yet. */
/* vvv Dat: last cpp bytes of tab are used for storing current pixel. */
char *tab=new char[cpp*(colors+1)], *p, *pend; /* BUGFIX: unsinged at Fri Nov 26 12:18:21 CET 2004 */
Image::Sampled::rgb_t *rgb=new Image::Sampled::rgb_t[colors], *rp;
for (rp=rgb,p=tab,pend=tab+cpp*colors; p!=pend; p+=cpp,rp++) {
tok.read(p,cpp);
*rp=tok.getColor();
if (*rp==0x1000000) {
if (transp!=colors) Error::sev(Error::WARNING) << "XPM: subsequent transparency might be blacked" << (Error*)0;
else transp=rp-rgb;
}
}
/* Now: transp: index of the last transparent color */
/* Dat: since (0x1000000&0xffffff)==0, transparent colors will have palette enrty black */
char *outbuf=0; /* avoid gcc warning */
Image::Sampled *ret;
Image::Indexed *iimg=(Image::Indexed*)NULLP;
tok.ungetcc(tok.T_COMMA);
if (colors<=256) {
ret=iimg=new Image::Indexed(wd,ht,colors,8);
if (transp!=colors) iimg->setTransp(transp);
} else {
ret=new Image::RGB(wd,ht,8);
if (transp!=colors) Error::sev(Error::WARNING) << "XPM: too many colors, transparency blacked" << (Error*)0;
}
outbuf=ret->getRowbeg();
if (cpp==1) { /* Easy job: make an Indexed image; defer .packPal() */
assert(colors<=256);
signed short bin[256], s;
memset(bin, 255, sizeof(bin)); /* Make bin[*]=-1 */
for (i=0;(unsigned)i<colors;i++) {
iimg->setPal(i, rgb[i]);
bin[(unsigned char)tab[i]]=i;
}
assert(p==pend);
while (ht--!=0) {
tok.getComma();
for (p=outbuf+ret->getRlen(); outbuf!=p; ) {
if ((i=tok.getcc())<0 || i>255) Error::sev(Error::EERROR) << "XPM: data expected" << (Error*)0;
if ((s=bin[i])<0) Error::sev(Error::EERROR) << "XPM: unpaletted color" << (Error*)0;
*outbuf++=s;
}
}
#if USE_BIG_MEMORY
} else if (cpp==2 && colors<=256) { /* Similarly easy job: make an Indexed image; defer .packPal() */
signed short *bin=new short[65536], s;
memset(bin, 255, sizeof(bin)); /* Make bin[*]=-1 */
for (i=0,p=tab; (unsigned)i<colors; i++, p+=2) {
iimg->setPal(i, rgb[i]);
bin[(p[0]<<8)+p[1]]=i;
}
assert(p==pend);
while (ht--!=0) {
tok.getComma();
for (p=outbuf+ret->getRlen(); outbuf!=p; ) {
tok.readInStr(pend,2);
if ((s=bin[(pend[0]<<8)+pend[1]])<0) Error::sev(Error::EERROR) << "XPM: unpaletted color" << (Error*)0;
*outbuf++=s;
}
}
delete [] bin;
} else if (cpp==2 && colors<=65535) {
Image::Sampled::rgb_t rgb1;
unsigned short *bin=new unsigned short[65536], s;
memset(bin, 255, sizeof(bin)); /* Make bin[*]=max */
for (i=0,p=tab; (unsigned)i<colors; i++, p+=2) bin[(p[0]<<8)+p[1]]=i;
while (ht--!=0) {
tok.getComma();
for (p=outbuf+ret->getRlen(); outbuf!=p; ) {
tok.readInStr(pend,2);
if ((s=bin[(pend[0]<<8)+pend[1]])==(unsigned short)-1) Error::sev(Error::EERROR) << "XPM: unpaletted color" << (Error*)0;
*outbuf++=(rgb1=rgb[s])>>16;
*outbuf++=rgb1>>8;
*outbuf++=rgb1;
}
}
delete [] bin;
#endif /* USE_BIG_MEMORY */
} else { /* Now comes the slow, but general solution */
#if USE_IN_XPM_MAPPING /* use Mapping */
if (colors<=256) {
Mapping::H h(1);
char c;
/* vvv `c' might become negative, but it is harmless */
for (p=tab,pend=tab+cpp*colors,c=0; p!=pend; p+=cpp,c++)
h.set(p, cpp, &c); /* every color-string should be unique; but no error message if it isn't */
while (ht--!=0) {
tok.getComma();
for (p=outbuf+ret->getRlen(); outbuf!=p; ) {
tok.readInStr(pend,cpp);
if (NULLP==(pend=h.get(pend, cpp))) Error::sev(Error::EERROR) << "XPM: unpaletted color" << (Error*)0;
*outbuf++=*pend;
}
}
} else { /* most general case with Mapping */
if (transp!=colors) Error::sev(Error::WARNING) << "XPM: too many colors, transparency blacked" << (Error*)0;
/* Dat: reading a JPEG downsampled to a 256-color XPM takes 3000 ms
* with Mapping, and 31000 ms without mapping. Nice speed increase.
*/
Mapping::H h(3);
char tmpcol[3];
for (p=tab,pend=tab+cpp*colors,rp=rgb; p!=pend; p+=cpp,rp++) {
tmpcol[0]=rp[0]>>16;
tmpcol[1]=rp[0]>>8;
tmpcol[2]=rp[0];
h.set(p, cpp, tmpcol); /* every color-string should be unique; but no error message if it isn't */
}
while (ht--!=0) {
tok.getComma();
for (p=outbuf+ret->getRlen(); outbuf!=p; outbuf+=3) {
tok.readInStr(pend,cpp);
if (NULLP==(pend=h.get(pend, cpp))) Error::sev(Error::EERROR) << "XPM: unpaletted color" << (Error*)0;
memcpy(outbuf, pend, 3);
}
}
}
#else /* don't USE_IN_XPM_MAPPING */
Image::Sampled::dimen_t lastcol=0, x;
p=tab; /* cache pointer for the last color (lastcol) */
if (colors<=256) {
assert(cpp>1);
for (lastcol=0;lastcol<colors;lastcol++) iimg->setPal(lastcol, rgb[lastcol]);
lastcol=0;
while (ht--!=0) {
// putchar('.');
tok.getComma();
for (x=0;x<wd;x++) {
tok.read(pend,cpp);
if (0!=memcmp(p,pend,cpp)) {
p=tab; lastcol=0; while (p!=pend && 0!=memcmp(p,pend,cpp)) { p+=cpp; lastcol++; }
if (p==pend) Error::sev(Error::EERROR) << "XPM: unpaletted color" << (Error*)0;
if (rgb[lastcol]==0x1000000) p=tab+cpp*(lastcol=transp); /* fix single transp */
}
*outbuf++=lastcol;
}
}
} else { /* colors>256 */
while (ht--!=0) {
tok.getComma();
for (x=0;x<wd;x++) {
tok.read(pend,cpp);
if (0!=memcmp(p,pend,cpp)) {
p=tab; lastcol=0; while (p!=pend && 0!=memcmp(p,pend,cpp)) { p+=cpp; lastcol++; }
if (p==pend) Error::sev(Error::EERROR) << "XPM: unpaletted color" << (Error*)0;
}
*outbuf++=rgb[lastcol]>>16;
*outbuf++=rgb[lastcol]>>8;
*outbuf++=rgb[lastcol];
}
}
}
#endif
}
delete [] tab;
delete [] rgb;
/* Dat: we don't check for EOF. Imp: emit a warning? */
// Error::sev(Error::DEBUG) << "rp[-1]=" << rp[-1] << (Error*)0;
// while (-1!=(i=tok.getcc())) { putchar(i); }
/* fclose((FILE*)file_); */
return ret;
}
static Image::Loader::reader_t in_xpm_checker(char buf[Image::Loader::MAGIC_LEN], char [Image::Loader::MAGIC_LEN], SimBuffer::Flat const&, Image::Loader::UFD*) {
return (0==memcmp(buf, "/* XPM */", 9)) ? in_xpm_reader : 0;
}
#else
# define in_xpm_checker NULLP
#endif /* USE_IN_XPM */
Image::Loader in_xpm_loader = { "XPM", in_xpm_checker, 0 };
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