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Пакет: giftrans

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giftrans-1.12.2/000075500000000000000000000000001213411436500134105ustar00rootroot00000000000000giftrans-1.12.2/giftrans.1000064400000000000000000000121721213411436500153120ustar00rootroot00000000000000.de DS
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.TH GIFTRANS l local
.SH NAME
.PP
giftrans \- transform gif from gif87 to gif89, making one color transparent
.SH SYNOPSIS
.PP
.B giftrans
.RI [ options ]
.BR [ -o
.IB filename ]
.B filename
.SH DESCRIPTION
.PP
.B giftrans
converts any GIF file into a GIF89a.
Allows for setting the transparent or background color, changing colors,
adding or removing comments. Also code to analyze GIF contents.
.SH OPTIONS
.IP -h
Print short help on stdout.
.IP -t
Specify the transparent color
.IP -T
Index of the transparent color is the background color index
.IP -B
Specify the transparent color's new value
.IP -b
Specify the background color
.IP -g
Change a color in the global color table
.IP -c
Add a comment
.IP -C
Remove old comment
.IP -l
Only list the color table
.IP -L
Verbose output of GIFs contents
.IP -V
Verbose output while converting
.IP -o
Redirect stdout to a file
.IP -e
Redirect stderr to a file
.PP
Colors may be specified as index, as rgb.txt entry or in the #rrggbb form.
.SH EXAMPLE
.PP
To convert the white background of a gif file to transparent, use
.sp
.DS
giftrans -t #ffffff file.gif > transparentfile.gif
.DE
.SH BUGS
.PP
This program has been tested on a HP9000/720 with HP-UX A.08.07
In this environment, neither lint -u nor gcc -Wall produce any messages.
If you encounter any errors or need to make any changes to port it
to another platform, please contact me.
.PP
Known bugs:
.IP
-B flag won't work if there's an Extension between the Global Color
Table and the Image Descriptor (or Graphic Control Extension). If -V
has been specified, a Warning Message will be displayed.
Will be fixed in 2.0
.IP
Always outputs GIF89a. Shouldn't do this if version is newer.
.IP
-D option may output changed data instead of original data, use
with caution, best only with then -L option.
.SH COPYRIGHT
.PP
Copyright (c) 24.2.94 by Andreas Ley <ley@rz.uni-karlsruhe.de>
.PP
Permission to use, copy, modify, and distribute this software for any
purpose and without fee is hereby granted, provided that the above
copyright notice appears in all copies. This software is provided "as is"
and without any express or implied warranties.
.SH VERSION HISTORY
.IP "Version 1.11 - 21.7.94"
Moved Plain Text Extension to the Extensions section where it belongs
.br
Accept Unknown Extension Labels
.br
Incorporated MS-DOS port by enzo@hk.net (Enzo Michelangeli)
.br
Added -o and -e options to redirect stdout and stderr
.br
Added -D debug flag
.IP "Version 1.10.2 - 22.6.94"
Support for -DRGBTXT flag
.IP "Version 1.10.1 - 21.6.94"
Different rgb.txt file FreeBSD/386BSD
.IP "Version 1.10 - 19.6.94"
Added option to change a color in the global color table
.br
Added option to change the color for the transparent color index
.IP "Version 1.9.1 - 7.6.94"
Different rgb.txt files for X11 and Open Windows
.IP "Version 1.9 - 1.6.94"
Fixed a bug which caused color names to be rejected.
.IP "Version 1.8 - 30.5.94"
Accept #rrggbb style arguments.
.br
Do nothing if rgb-color not found in GIF.
.IP "Version 1.7 - 16.5.94"
Added -l option to only list the color table.
.br
Added -L option for verbose output without creating a gif.
Added -b option to change the background color index.
.br
Display all matching color names for color table entries.
.br
Fixed a bug which caused bad color names if rgb.txt starts with
whitespace.
.br
Doesn't use strdup anymore.
.br
Fixed =& bug on dec machines.
.IP "Version 1.6 - 5.4.94"
Added color names recognition.
.IP "Version 1.5 - 15.3.94"
Added basic verbose output to analyze GIFs.
.IP "Version 1.4 - 8.3.94"
Fixed off-by-one bug in Local Color table code.
.br
Added option to add or remove a comment.
.br
Transparency is no longer the default.
.PP
This man file made 9.8 from documentation in the program source code
by Kai Nordlund (knordlun@fltxa.helsinki.fi).
.SH THANKS
.PP
Thanx for bug reports, ideas and fixes to
.IP
patricka@cs.kun.nl (Patrick Atoon)
.IP
wes@msc.edu (Wes Barris)
.IP
pmfitzge@ingr.com (Patrick M. Fitzgerald)
.IP
hoesel@chem.rug.nl (frans van hoesel)
.IP
boardman@jerry.sal.wisc.edu (Dan Boardman)
.IP
krweiss@chip.ucdavis.edu (Ken Weiss)
.IP
chuck@trantor.harris-atd.com (Chuck Musciano)
.IP
heycke@camis.stanford.edu (Torsten Heycke)
.IP
claw@spacsun.rice.edu (Colin Law)
.IP
jwalker@eos.ncsu.edu (Joseph C. Walker)
.IP
Bjorn.Borud@alkymi.unit.no (Bjorn Borud)
.IP
Christopher.Vance@adfa.oz.au (CJS Vance)
.IP
pederl@norway.hp.com (Peder Langlo)
.IP
I.Rutson@bradford.ac.uk (Ian Rutson)
.IP
Nicolas.Pioch@enst.fr (Nicolas Pioch)
.IP
john@charles.CS.UNLV.EDU (John Kilburg)
.IP
enzo@hk.net (Enzo Michelangeli)
.SH DISTRIBUTION
.IP "Original distribution site is"
ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.c
.IP "To compile for MS-DOS, you need getopt:"
ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/getopt.c
.IP "MS-DOS executable can be found at"
ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.exe
.IP "A template rgb.txt for use with the MS-DOS version can be found at"
ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/rgb.txt
.IP "Additional info can be found on"
http://melmac.corp.harris.com/transparent_images.html
.SH SEE ALSO
.PP
xv(1), giftoppm(1), ppmtogif(1)
giftrans-1.12.2/giftrans.c000064400000000000000000000653161213411436500154040ustar00rootroot00000000000000/*
** GIFtrans v1.12.2
**
** Convert any GIF file into a GIF89a
** Allows for setting the transparent or background color, changing colors,
** adding or removing comments. Also code to analyze GIF contents.
**
** Copyright (C) 24.2.94 by Andreas Ley <ley@rz.uni-karlsruhe.de>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
** This program has been tested on a HP9000/715 with HP-UX A.09.05
** In this environment, neither lint -u nor gcc -Wall produce any messages.
** It has also been compiled on AIX 3.2 and Solaris 2.3.
** If you encounter any errors or need to make any changes to port it
** to another platform, please contact me.
**
** Known bugs:
** -B flag won't work if there's an Extension between the Global Color
** Table and the Image Descriptor (or Graphic Control Extension). If -V
** has been specified, a Warning Message will be displayed.
** Will be fixed in 2.0 (if ever)
** -D option may output changed data instead of original data, use
** with caution, best only with then -L option.
**
** Version history
**
** Version 1.12.2 - 11.4.96
** Changed to GNU copyright
**
** Version 1.12.1 - 9.2.96
** Fix for multi-word color names.
**
** Version 1.12 - 17.2.95
** Incorporated dumpcomment by omerzu@quantum.de (Thomas Omerzu)
** Outputs original version if newer than GIF89a.
**
** Version 1.11.2 - 14.12.94
** Incorporated OS/2 port by k.rusch@ieee.org (Klaus Johannes Rusch)
** Different rgb.txt file for OS/2, setmode replaced by freopen for
** OS/2 (SAA C)
**
** Version 1.11.1 - 11.8.94
** Allows for use of the -g option without the -B option.
**
** Version 1.11 - 21.7.94
** Moved Plain Text Extension to the Extensions section where it belongs.
** Accept Unknown Extension Labels.
** Incorporated MS-DOS port by enzo@hk.net (Enzo Michelangeli).
** Added -o and -e options to redirect stdout and stderr.
** Added -D debug flag.
**
** Version 1.10.2 - 22.6.94
** Support for -DRGBTXT flag.
**
** Version 1.10.1 - 21.6.94
** Different rgb.txt file FreeBSD/386BSD.
**
** Version 1.10 - 19.6.94
** Added -g option to change a color in the global color table.
** Added -B option to change the color for the transparent color index.
**
** Version 1.9.1 - 7.6.94
** Different rgb.txt files for X11 and Open Windows.
**
** Version 1.9 - 1.6.94
** Fixed a bug which caused color names to be rejected.
**
** Version 1.8 - 30.5.94
** Accept #rrggbb style arguments.
** Do nothing if rgb-color not found in GIF.
**
** Version 1.7 - 16.5.94
** Added -l option to only list the color table.
** Added -L option for verbose output without creating a gif.
** Added -b option to change the background color index.
** Display all matching color names for color table entries.
** Fixed a bug which caused bad color names if rgb.txt starts with
** whitespace.
** Doesn't use strdup anymore.
** Fixed =& bug on dec machines.
**
** Version 1.6 - 5.4.94
** Added color names recognition.
**
** Version 1.5 - 15.3.94
** Added basic verbose output to analyze GIFs.
**
** Version 1.4 - 8.3.94
** Fixed off-by-one bug in Local Color table code.
** Added -c and -C options to add or remove a comment.
** Transparency is no longer the default.
**
** Thanx for bug reports, ideas and fixes to
** patricka@cs.kun.nl (Patrick Atoon)
** wes@msc.edu (Wes Barris)
** pmfitzge@ingr.com (Patrick M. Fitzgerald)
** hoesel@chem.rug.nl (Frans van Hoesel)
** boardman@jerry.sal.wisc.edu (Dan Boardman)
** krweiss@chip.ucdavis.edu (Ken Weiss)
** chuck.musciano@harris.com (Chuck Musciano)
** heycke@camis.stanford.edu (Torsten Heycke)
** claw@spacsun.rice.edu (Colin Law)
** jwalker@eos.ncsu.edu (Joseph C. Walker)
** Bjorn.Borud@alkymi.unit.no (Bjorn Borud)
** Christopher.Vance@adfa.oz.au (CJS Vance)
** pederl@norway.hp.com (Peder Langlo)
** I.Rutson@bradford.ac.uk (Ian Rutson)
** Nicolas.Pioch@enst.fr (Nicolas Pioch)
** john@charles.CS.UNLV.EDU (John Kilburg)
** enzo@hk.net (Enzo Michelangeli)
** twv@hpwtwe0.cup.hp.com (Terry von Gease)
** k.rusch@ieee.org (Klaus Johannes Rusch)
** omerzu@quantum.de (Thomas Omerzu)
** Willem.Vermin@sara.nl (Willem Vermin)
** wjones@tc.fluke.COM (Warren Jones)
**
** Original distribution site is
** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.c
** A man-page by knordlun@fltxa.helsinki.fi (Kai Nordlund) is at
** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.1
** An online version by taylor@intuitive.com (Dave Taylor) is at
** http://www.intuitive.com/coolweb/Addons/giftrans-doc.html
** To compile for MS-DOS or OS/2, you need getopt:
** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/getopt.c
** MS-DOS executable can be found at
** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.exe
** OS/2 executable can be found at
** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/giftrans.os2.exe
** A template rgb.txt for use with the MS-DOS version can be found at
** ftp://ftp.rz.uni-karlsruhe.de/pub/net/www/tools/giftrans/rgb.txt
** Additional info can be found on
** http://melmac.corp.harris.com/transparent_images.html
** The GIF file format is documented in
** ftp://ftp.uu.net/doc/literary/obi/Standards/Graphics/Formats/gif89a.doc.Z
*/

#define X11 /* When using X Window System */
#undef OPENWIN /* When using Open Windows */
#undef X386 /* When using XFree86 with FreeBSD/386BSD */
#undef OS2 /* When using IBM C/C++ 2.0 */
#ifndef MSDOS /* required for TurboC 1.0 */
#undef MSDOS /* When using Borland C (maybe MSC too) */
#endif

#ifndef OS2_OR_MSDOS
#ifdef OS2
#define OS2_OR_MSDOS
#endif /* OS2 */
#ifdef MSDOS
#define OS2_OR_MSDOS
#endif /* MSDOS */
#endif /* OS2_OR_MSDOS */

char copyright[] = "@(#)Copyright (C) 1994 by Andreas Ley (ley@rz.uni-karlsruhe.de)";
char sccsid[] = "@(#)GIFtrans v1.12.2 - Transpose GIF files";

#ifndef RGBTXT
#ifdef X11
#define RGBTXT "/usr/lib/X11/rgb.txt"
#else /* X11 */
#ifdef OPENWIN
#define RGBTXT "/usr/openwin/lib/rgb.txt"
#else /* OPENWIN */
#ifdef X386
#define RGBTXT "/usr/X386/lib/X11/rgb.txt"
#else /* X386 */
#ifdef OS2_OR_MSDOS
#define RGBTXT "rgb.txt"
#else /* OS2_OR_MSDOS */
#define RGBTXT "";
#endif /* OS2_OR_MSDOS */
#endif /* X386 */
#endif /* OPENWIN */
#endif /* X11 */
#endif /* RGBTXT */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#ifndef OS2_OR_MSDOS
#include <unistd.h>
#include <ctype.h>
#include <sys/param.h>
#else /* OS2_OR_MSDOS */
#include <fcntl.h>
#ifdef OS2
#include <io.h>
#endif /* OS2 */
#include "getopt.c"
#endif /* OS2_OR_MSDOS */

#ifndef MAXPATHLEN
#define MAXPATHLEN 256
#endif /* MAXPATHLEN */

#ifndef FALSE
#define FALSE (0) /* This is the naked Truth */
#define TRUE (1) /* and this is the Light */
#endif

#define SUCCESS (0)
#define FAILURE (1)

struct entry {
struct entry *next;
char *name;
int red;
int green;
int blue;
} *root;

#define NONE (-1)
#define OTHER (-2)
#define RGB (-3)

struct color {
int index;
int red;
int green;
int blue;
} bc,tc,tn,go,gn;

static char *image,*comment;
static int skipcomment,list,verbose,output,debug;
static long int pos;

static char rgbtxt[] = RGBTXT, *rgb = rgbtxt;
static char true[] = "True";
static char false[] = "False";

#define readword(buffer) ((buffer)[0]+256*(buffer)[1])
#define readflag(buffer) ((buffer)?true:false)
#define hex(c) ('a'<=(c)&&(c)<='z'?(c)-'a'+10:'A'<=(c)&&(c)<='Z'?(c)-'A'+10:(c)-'0')


void dump(adr,data,len)
long int adr;
unsigned char *data;
size_t len;
{
int i;

while (len>0) {
(void)fprintf(stderr,"%08lx:%*s",adr,(int)((adr%16)*3+(adr%16>8?1:0)),"");
for (i=adr%16;i<16&&len>0;i++,adr++,data++,len--)
(void)fprintf(stderr,"%s%02x",i==8?" ":" ",*data);
(void)fprintf(stderr,"\n");
}
}



void writedata(dest,data,len)
FILE *dest;
unsigned char *data;
size_t len;
{
unsigned char size;

while (len) {
size=len<256?len:255;
(void)fwrite((void *)&size,1,1,dest);
(void)fwrite((void *)data,(size_t)size,1,dest);
data+=size;
len-=size;
}
size=0;
(void)fwrite((void *)&size,1,1,dest);
}


void skipdata(src)
FILE *src;
{
unsigned char size,buffer[256];

do {
pos=ftell(src);
(void)fread((void *)&size,1,1,src);
if (debug)
dump(pos,&size,1);
if (debug) {
pos=ftell(src);
(void)fread((void *)buffer,(size_t)size,1,src);
dump(pos,buffer,(size_t)size);
}
else
(void)fseek(src,(long int)size,SEEK_CUR);
} while (!feof(src)&&size>0);
}


void transblock(src,dest)
FILE *src;
FILE *dest;
{
unsigned char size,buffer[256];

pos=ftell(src);
(void)fread((void *)&size,1,1,src);
if (debug)
dump(pos,&size,1);
if (output)
(void)fwrite((void *)&size,1,1,dest);
pos=ftell(src);
(void)fread((void *)buffer,(size_t)size,1,src);
if (debug)
dump(pos,buffer,(size_t)size);
if (output)
(void)fwrite((void *)buffer,(size_t)size,1,dest);
}


void dumpcomment(src)
FILE *src;
{
unsigned char size,buffer[256];
size_t i;

pos=ftell(src);
(void)fread((void *)&size,1,1,src);
if (debug)
dump(pos,&size,1);
(void)fread((void *)buffer,(size_t)size,1,src);
if (debug)
dump(pos+1,buffer,(size_t)size);
for (i=0; i<(size_t)size; i++)
{
if (i%60==0)
(void)putc('\t',stderr);
if (isprint(buffer[i]))
(void)putc(buffer[i],stderr);
else
(void)fprintf(stderr,"\\%03o",buffer[i]);
if (i%60==59)
(void)putc('\n',stderr);
}
if (i%60)
(void)putc('\n',stderr);
(void)fseek(src,(long int)pos,SEEK_SET);
}


void transdata(src,dest)
FILE *src;
FILE *dest;
{
unsigned char size,buffer[256];

do {
pos=ftell(src);
(void)fread((void *)&size,1,1,src);
if (debug)
dump(pos,&size,1);
if (output)
(void)fwrite((void *)&size,1,1,dest);
pos=ftell(src);
(void)fread((void *)buffer,(size_t)size,1,src);
if (debug)
dump(pos,buffer,(size_t)size);
if (output)
(void)fwrite((void *)buffer,(size_t)size,1,dest);
} while (!feof(src)&&size>0);
}


int giftrans(src,dest)
FILE *src;
FILE *dest;
{
unsigned char buffer[3*256],lsd[7],gct[3*256],gce[5];
unsigned int cnt,cols,size,gct_size,gct_delay,gce_present;
struct entry *rgbptr;


/* Header */
pos=ftell(src);
(void)fread((void *)buffer,6,1,src);
if (strncmp((char *)buffer,"GIF",3)) {
(void)fprintf(stderr,"No GIF file!\n");
return(1);
}
if (verbose) {
buffer[6]='\0';
(void)fprintf(stderr,"Header: \"%s\"\n",buffer);
}
if (debug)
dump(pos,buffer,6);
if (output) {
if (!strncmp((char *)buffer,"GIF87a",6))
buffer[4]='9';
(void)fwrite((void *)buffer,6,1,dest);
}

/* Logical Screen Descriptor */
pos=ftell(src);
(void)fread((void *)lsd,7,1,src);
if (verbose) {
(void)fprintf(stderr,"Logical Screen Descriptor:\n");
(void)fprintf(stderr,"\tLogical Screen Width: %d pixels\n",readword(lsd));
(void)fprintf(stderr,"\tLogical Screen Height: %d pixels\n",readword(lsd+2));
(void)fprintf(stderr,"\tGlobal Color Table Flag: %s\n",readflag(lsd[4]&0x80));
(void)fprintf(stderr,"\tColor Resolution: %d bits\n",(lsd[4]&0x70>>4)+1);
if (lsd[4]&0x80) {
(void)fprintf(stderr,"\tSort Flag: %s\n",readflag(lsd[4]&0x8));
(void)fprintf(stderr,"\tSize of Global Color Table: %d colors\n",2<<(lsd[4]&0x7));
(void)fprintf(stderr,"\tBackground Color Index: %d\n",lsd[5]);
}
if (lsd[6])
(void)fprintf(stderr,"\tPixel Aspect Ratio: %d (Aspect Ratio %f)\n",lsd[6],((double)lsd[6]+15)/64);
}
if (debug)
dump(pos,lsd,7);

/* Global Color Table */
gct_delay=FALSE;
if (lsd[4]&0x80) {
gct_size=2<<(lsd[4]&0x7);
pos=ftell(src);
(void)fread((void *)gct,gct_size,3,src);
if (go.index==RGB)
for(cnt=0;cnt<gct_size&&go.index==RGB;cnt++)
if (gct[3*cnt]==go.red&&gct[3*cnt+1]==go.green&&gct[3*cnt+2]==go.blue)
go.index=cnt;
if (go.index>=0) {
if (gn.index>=0) {
gn.red=gct[3*gn.index];
gn.green=gct[3*gn.index+1];
gn.blue=gct[3*gn.index+2];
}
gct[3*go.index]=gn.red;
gct[3*go.index+1]=gn.green;
gct[3*go.index+2]=gn.blue;
}
if (bc.index==RGB)
for(cnt=0;cnt<gct_size&&bc.index==RGB;cnt++)
if (gct[3*cnt]==bc.red&&gct[3*cnt+1]==bc.green&&gct[3*cnt+2]==bc.blue)
bc.index=cnt;
if (bc.index>=0)
lsd[5]=bc.index;
if (tc.index==RGB)
for(cnt=0;cnt<gct_size&&tc.index==RGB;cnt++)
if (gct[3*cnt]==tc.red&&gct[3*cnt+1]==tc.green&&gct[3*cnt+2]==tc.blue)
tc.index=cnt;
if (tc.index==OTHER)
tc.index=lsd[5];
if (tn.index>=0) {
tn.red=gct[3*tn.index];
tn.green=gct[3*tn.index+1];
tn.blue=gct[3*tn.index+2];
}
if (tn.index!=NONE)
gct_delay=TRUE;
}
if (output)
(void)fwrite((void *)lsd,7,1,dest);
if (lsd[4]&0x80) {
if (list||verbose) {
(void)fprintf(stderr,"Global Color Table:\n");
for(cnt=0;cnt<gct_size;cnt++) {
(void)fprintf(stderr,"\tColor %d: Red %d, Green %d, Blue %d",cnt,gct[3*cnt],gct[3*cnt+1],gct[3*cnt+2]);
(void)fprintf(stderr,", #%02x%02x%02x",gct[3*cnt],gct[3*cnt+1],gct[3*cnt+2]);
for (rgbptr=root,cols=0;rgbptr;rgbptr=rgbptr->next)
if (rgbptr->red==gct[3*cnt]&&rgbptr->green==gct[3*cnt+1]&&rgbptr->blue==gct[3*cnt+2])
(void)fprintf(stderr,"%s%s",cols++?", ":" (",rgbptr->name);
(void)fprintf(stderr,"%s\n",cols?")":"");
}
}
if (debug)
dump(pos,gct,gct_size*3);
if (output&&(!gct_delay))
(void)fwrite((void *)gct,gct_size,3,dest);
}

gce_present=FALSE;
do {
pos=ftell(src);
(void)fread((void *)buffer,1,1,src);
switch (buffer[0]) {
case 0x2c: /* Image Descriptor */
if (verbose)
(void)fprintf(stderr,"Image Descriptor:\n");
(void)fread((void *)(buffer+1),9,1,src);
/* Write Graphic Control Extension */
if (tc.index>=0||gce_present) {
if (!gce_present) {
gce[0]=0;
gce[1]=0;
gce[2]=0;
}
if (tc.index>=0) {
gce[0]|=0x01; /* Set Transparent Color Flag */
gce[3]=tc.index; /* Set Transparent Color Index */
}
else if (gce[0]&0x01)
tc.index=gce[3]; /* Remember Transparent Color Index */
gce[4]=0;
if (tc.index>=0&&(!(buffer[8]&0x80))) { /* Transparent Color Flag set and no Local Color Table */
gct[3*tc.index]=tn.red;
gct[3*tc.index+1]=tn.green;
gct[3*tc.index+2]=tn.blue;
}
if (output&&gct_delay) {
(void)fwrite((void *)gct,gct_size,3,dest);
gct_delay=FALSE;
}
if (output) {
(void)fputs("\041\371\004",dest);
(void)fwrite((void *)gce,5,1,dest);
}
}
if (output&&gct_delay) {
if (verbose)
(void)fprintf(stderr,"Warning: Global Color Table has not been modified as no Transparent Color Index has been set\n");
(void)fwrite((void *)gct,gct_size,3,dest);
gct_delay=FALSE;
}
/* Write Image Descriptor */
if (verbose) {
(void)fprintf(stderr,"\tImage Left Position: %d pixels\n",readword(buffer+1));
(void)fprintf(stderr,"\tImage Top Position: %d pixels\n",readword(buffer+3));
(void)fprintf(stderr,"\tImage Width: %d pixels\n",readword(buffer+5));
(void)fprintf(stderr,"\tImage Height: %d pixels\n",readword(buffer+7));
(void)fprintf(stderr,"\tLocal Color Table Flag: %s\n",readflag(buffer[9]&0x80));
(void)fprintf(stderr,"\tInterlace Flag: %s\n",readflag(buffer[9]&0x40));
if (buffer[9]&0x80) {
(void)fprintf(stderr,"\tSort Flag: %s\n",readflag(buffer[9]&0x20));
(void)fprintf(stderr,"\tSize of Global Color Table: %d colors\n",2<<(buffer[9]&0x7));
}
}
if (debug)
dump(pos,buffer,10);
if (output)
(void)fwrite((void *)buffer,10,1,dest);
/* Local Color Table */
if (buffer[8]&0x80) {
size=2<<(buffer[8]&0x7);
pos=ftell(src);
(void)fread((void *)buffer,size,3,src);
if (verbose) {
(void)fprintf(stderr,"Local Color Table:\n");
for(cnt=0;cnt<size;cnt++)
(void)fprintf(stderr,"\tColor %d: Red %d, Green %d, Blue %d\n",cnt,buffer[3*cnt],buffer[3*cnt+1],buffer[3*cnt+2]);
}
if (tc.index>=0) { /* Transparent Color Flag set */
buffer[3*tc.index]=tn.red;
buffer[3*tc.index+1]=tn.green;
buffer[3*tc.index+2]=tn.blue;
}
if (debug)
dump(pos,buffer,size*3);
if (output)
(void)fwrite((void *)buffer,size,3,dest);
}
/* Table Based Image Data */
pos=ftell(src);
(void)fread((void *)buffer,1,1,src);
if (verbose) {
(void)fprintf(stderr,"Table Based Image Data:\n");
(void)fprintf(stderr,"\tLZW Minimum Code Size: 0x%02x\n",buffer[0]);
}
if (debug)
dump(pos,buffer,1);
if (output)
(void)fwrite((void *)buffer,1,1,dest);
transdata(src,dest);
gce_present=FALSE;
break;
case 0x3b: /* Trailer */
if (verbose)
(void)fprintf(stderr,"Trailer\n");
if (debug)
dump(pos,buffer,1);
if (comment&&*comment&&output) {
(void)fputs("\041\376",dest);
writedata(dest,(unsigned char *)comment,strlen(comment));
}
if (output)
(void)fwrite((void *)buffer,1,1,dest);
break;
case 0x21: /* Extension */
(void)fread((void *)(buffer+1),1,1,src);
switch (buffer[1]) {
case 0x01: /* Plain Text Extension */
if (output&&gct_delay) {
if (verbose)
(void)fprintf(stderr,"Warning: Global Color Table has not been modified due to a Plain Text Extension\n");
(void)fwrite((void *)gct,gct_size,3,dest);
gct_delay=FALSE;
}
if (verbose)
(void)fprintf(stderr,"Plain Text Extension\n");
if (debug)
dump(pos,buffer,2);
if (output)
(void)fwrite((void *)buffer,2,1,dest);
transblock(src,dest);
transdata(src,dest);
break;
case 0xf9: /* Graphic Control Extension */
if (verbose)
(void)fprintf(stderr,"Graphic Control Extension:\n");
(void)fread((void *)(buffer+2),1,1,src);
size=buffer[2];
(void)fread((void *)gce,size,1,src);
if (verbose) {
(void)fprintf(stderr,"\tDisposal Method: %d ",gce[0]&0x1c>>2);
switch (gce[0]&0x1c>>2) {
case 0:
(void)fprintf(stderr,"(no disposal specified)\n");
break;
case 1:
(void)fprintf(stderr,"(do not dispose)\n");
break;
case 2:
(void)fprintf(stderr,"(restore to background color)\n");
break;
case 3:
(void)fprintf(stderr,"(restore to previous)\n");
break;
default:
(void)fprintf(stderr,"(to be defined)\n");
}
(void)fprintf(stderr,"\tUser Input Flag: %s\n",readflag(gce[0]&0x2));
(void)fprintf(stderr,"\tTransparent Color Flag: %s\n",readflag(gce[0]&0x1));
(void)fprintf(stderr,"\tDelay Time: %d\n",readword(gce+1));
if (gce[0]&0x1)
(void)fprintf(stderr,"\tTransparent Color Index: %d\n",gce[3]);
}
if (debug) {
dump(pos,buffer,3);
dump(pos+3,gce,size);
}
pos=ftell(src);
(void)fread((void *)buffer,1,1,src);
if (debug)
dump(pos,buffer,1);
gce_present=TRUE;
break;
case 0xfe: /* Comment Extension */
if (verbose)
{
(void)fprintf(stderr,"Comment Extension\n");
dumpcomment(src);
}
if (debug)
dump(pos,buffer,2);
if (skipcomment)
skipdata(src);
else {
if (output&&gct_delay) {
if (verbose)
(void)fprintf(stderr,"Warning: Global Color Table has not been modified due to a Comment Extension\n");
(void)fwrite((void *)gct,gct_size,3,dest);
gct_delay=FALSE;
}
if (output)
(void)fwrite((void *)buffer,2,1,dest);
transdata(src,dest);
}
break;
case 0xff: /* Application Extension */
if (output&&gct_delay) {
if (verbose)
(void)fprintf(stderr,"Warning: Global Color Table has not been modified due to a Application Extension\n");
(void)fwrite((void *)gct,gct_size,3,dest);
gct_delay=FALSE;
}
if (verbose)
(void)fprintf(stderr,"Application Extension\n");
if (debug)
dump(pos,buffer,2);
if (output)
(void)fwrite((void *)buffer,2,1,dest);
transblock(src,dest);
transdata(src,dest);
break;
default:
if (output&&gct_delay) {
if (verbose)
(void)fprintf(stderr,"Warning: Global Color Table has not been modified due to an unknown Extension\n");
(void)fwrite((void *)gct,gct_size,3,dest);
gct_delay=FALSE;
}
if (verbose)
(void)fprintf(stderr,"Unknown label: 0x%02x\n",buffer[1]);
if (debug)
dump(pos,buffer,2);
if (output)
(void)fwrite((void *)buffer,2,1,dest);
transblock(src,dest);
transdata(src,dest);
break;
}
break;
default:
(void)fprintf(stderr,"0x%08lx: Unknown extension 0x%02x!\n",ftell(src)-1,buffer[0]);
if (debug)
dump(pos,buffer,1);
return(1);
}
} while (buffer[0]!=0x3b&&!feof(src));
return(buffer[0]==0x3b?SUCCESS:FAILURE);
}



int getindex(c,arg)
struct color *c;
char *arg;
{
struct entry *ptr;

if ('0'<=*arg&&*arg<='9')
c->index=atoi(arg);
else if (*arg=='#') {
if (strlen(arg)==4) {
c->index=RGB;
c->red=hex(arg[1])<<4;
c->green=hex(arg[2])<<4;
c->blue=hex(arg[3])<<4;
}
else if (strlen(arg)==7) {
c->index=RGB;
c->red=(hex(arg[1])<<4)+hex(arg[2]);
c->green=(hex(arg[3])<<4)+hex(arg[4]);
c->blue=(hex(arg[5])<<4)+hex(arg[6]);
}
else {
(void)fprintf(stderr,"%s: illegal color specification: %s\n",image,arg);
return(FAILURE);
}
}
else {
for (ptr=root;ptr&&c->index!=RGB;ptr=ptr->next)
if (!strcmp(ptr->name,arg)) {
c->index=RGB;
c->red=ptr->red;
c->green=ptr->green;
c->blue=ptr->blue;
}
if (c->index!=RGB) {
(void)fprintf(stderr,"%s: no such color: %s\n",image,arg);
return(FAILURE);
}
}
return(SUCCESS);
}



void usage()
{
(void)fprintf(stderr,"Usage: %s [-t color|-T] [-B color] [-b color] [-g oldcolor=newcolor] [-c comment|-C] [-l|-L|-V] [-o filename] [-e filename] [filename]\n",image);
(void)fprintf(stderr,"Convert any GIF file into a GIF89a, with the folloing changes possible:\n");
(void)fprintf(stderr,"-t Specify the transparent color\n");
(void)fprintf(stderr,"-T Index of the transparent color is the background color index\n");
(void)fprintf(stderr,"-B Specify the transparent color's new value\n");
(void)fprintf(stderr,"-b Specify the background color\n");
(void)fprintf(stderr,"-g Change a color in the global color table\n");
(void)fprintf(stderr,"-c Add a comment\n");
(void)fprintf(stderr,"-C Remove old comment\n");
(void)fprintf(stderr,"-l Only list the color table\n");
(void)fprintf(stderr,"-L Verbose output of GIFs contents\n");
(void)fprintf(stderr,"-V Verbose output while converting\n");
(void)fprintf(stderr,"-o Redirect stdout to a file\n");
(void)fprintf(stderr,"-e Redirect stderr to a file\n");
if (*rgb)
(void)fprintf(stderr,"Colors may be specified as index, as rgb.txt entry or in the #rrggbb form.\n");
else
(void)fprintf(stderr,"Colors may be specified as index or in the #rrggbb form.\n");
exit(1);
}


int main(argc,argv)
int argc;
char *argv[];
{
int c;
extern char *optarg;
extern int optind;
char error[2*MAXPATHLEN+14],line[BUFSIZ],*ptr,*nptr,*oname,*ename;
struct entry **next;
FILE *src;
int stat;

#ifdef OS2
ptr=getenv("XFILES");
if (ptr) {
rgb=(char *)malloc(strlen(ptr)+strlen(rgbtxt)+2);
(void)strcpy(rgb,ptr);
(void)strcat(rgb,"\\");
(void)strcat(rgb,rgbtxt);
}
#endif /* OS2 */

image=argv[0];
root=NULL;
if (*rgb)
if ((src=fopen(rgb,"r"))!=NULL) {
next= &root;
while (fgets(line,sizeof(line),src)) {
*next=(struct entry *)malloc(sizeof(struct entry));
for (ptr=line;strchr(" \t",*ptr);ptr++);
for (nptr=ptr;!strchr(" \t",*ptr);ptr++);
*ptr++='\0';
(*next)->red=atoi(nptr);
for (;strchr(" \t",*ptr);ptr++);
for (nptr=ptr;!strchr(" \t",*ptr);ptr++);
*ptr++='\0';
(*next)->green=atoi(nptr);
for (;strchr(" \t",*ptr);ptr++);
for (nptr=ptr;!strchr(" \t",*ptr);ptr++);
*ptr++='\0';
(*next)->blue=atoi(nptr);
for (;strchr(" \t",*ptr);ptr++);
nptr=ptr;
for (ptr=strchr(ptr,'\0');ptr>nptr&&strchr(" \t\r\n",*(ptr-1));ptr--);
*ptr='\0';
(void)strcpy((*next)->name=(char *)malloc(strlen(nptr)+1),nptr);
(*next)->next=NULL;
next= &(*next)->next;
}
(void)fclose(src);
}
else {
#ifndef OS2_OR_MSDOS
(void)sprintf(error,"%s: cannot open %s",image,rgb);
perror(error);
return(FAILURE);
#else /* OS2_OR_MSDOS */
*rgb='\0';
#endif
}

bc.index=NONE;
tc.index=NONE;
tn.index=NONE;
go.index=NONE;
gn.index=NONE;
comment=NULL;
skipcomment=FALSE;
verbose=FALSE;
output=TRUE;
debug=FALSE;
oname=NULL;
ename=NULL;
while ((c=getopt(argc,argv,"t:TB:b:g:c:ClLVDo:e:vh?")) != EOF)
switch ((char)c) {
case 'b':
if (getindex(&bc,optarg))
return(FAILURE);
break;
case 't':
if (getindex(&tc,optarg))
return(FAILURE);
break;
case 'T':
tc.index=OTHER;
break;
case 'B':
if (getindex(&tn,optarg))
return(FAILURE);
break;
case 'g':
if ((ptr=strchr(optarg,'='))!=NULL) {
*ptr++='\0';
if (getindex(&go,optarg))
return(FAILURE);
if (getindex(&gn,ptr))
return(FAILURE);
}
else
usage();
break;
case 'c':
comment=optarg;
break;
case 'C':
skipcomment=TRUE;
break;
case 'l':
list=TRUE;
output=FALSE;
break;
case 'L':
verbose=TRUE;
output=FALSE;
break;
case 'V':
verbose=TRUE;
break;
case 'D':
debug=TRUE;
break;
case 'o':
oname=optarg;
break;
case 'e':
ename=optarg;
break;
case 'v':
(void)fprintf(stderr,"%s\n",sccsid+4);
(void)fprintf(stderr,"%s\n",copyright+4);
return(0);
case 'h':
(void)fprintf(stderr,"%s\n",sccsid+4);
(void)fprintf(stderr,"%s\n",copyright+4);
case '?':
usage();
}
if (optind+1<argc||(bc.index==NONE&&tc.index==NONE&&tn.index==NONE&&gn.index==NONE&&comment==NULL&&!skipcomment&&!list&&!verbose))
usage();

if (oname&&freopen(oname,"wb",stdout)==NULL) {
(void)sprintf(error,"%s: cannot open %s",image,oname);
perror(error);
return(FAILURE);
}

if (ename&&freopen(ename,"wb",stderr)==NULL) {
(void)sprintf(error,"%s: cannot open %s",image,ename);
perror(error);
return(FAILURE);
}

#ifdef OS2_OR_MSDOS
#ifdef MSDOS
if(oname==NULL&&(stdout->flags&_F_TERM)==0&&setmode(fileno(stdout),O_BINARY)!=0) {
#endif /* MSDOS */
#ifdef OS2
if(oname==NULL&&!freopen("", "wb", stdout)) {
#endif /* OS2 */
(void)fprintf(stderr,"%s: can't set stdout's mode to binary\n",image);
exit(2);
}
#ifdef MSDOS
if(optind==argc&&(stdin->flags&_F_TERM)==0&&setmode(fileno(stdin),O_BINARY)) {
#endif /* MSDOS */
#ifdef OS2
if(optind==argc&&!freopen("", "rb", stdin)) {
#endif /* OS2 */
(void)fprintf(stderr,"%s: can't set stdin's mode to binary\n",image);
exit(2);
}
#endif /* OS2_OR_MSDOS */

if (optind<argc)
if (strcmp(argv[optind],"-"))
if ((src=fopen(argv[optind],"rb"))!=NULL) {
stat=giftrans(src,stdout);
(void)fclose(src);
}
else {
(void)sprintf(error,"%s: cannot open %s",image,argv[optind]);
perror(error);
return(FAILURE);
}
else
stat=giftrans(stdin,stdout);
else
stat=giftrans(stdin,stdout);

(void)fclose(stdout);
(void)fclose(stderr);
return(stat);
}
 
дизайн и разработка: Vladimir Lettiev aka crux © 2004-2005, Andrew Avramenko aka liks © 2007-2008
текущий майнтейнер: Michael Shigorin