Moved third-party libraries to a separate subdirectory

12 files changed, 0 insertions, 1486 deletions

diff --git a/libpng/contrib/pngminus/README b/libpng/contrib/pngminus/README
deleted file mode 100644
index bbe7407..0000000
--- a/libpng/contrib/pngminus/README
+++ /dev/null
@@ -1,153 +0,0 @@
-PngMinus
---------
-(copyright Willem van Schaik, 1999)
-
-
-License
--------
-
-Permission to use, copy, modify, and distribute this software and
-its documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and
-that both that copyright notice and this permission notice appear in
-supporting documentation. This software is provided "as is" without
-express or implied warranty.
-
-
-Some history
-------------
-Soon after the creation of PNG in 1995, the need was felt for a set of
-pnmtopng / pngtopnm utilities. Independantly Alexander Lehmann and I
-(Willem van Schaik) started such a project. Luckily we discovered this
-and merged the two together into pnmtopng.tar.gz, which is available
-from a/o ftp://ftp.simplesystems.org/pub/libpng/png/.
-
-These two utilities have many, many options and make use of most of the
-features of PNG, like gamma, alpha, sbit, text-chunks, etc. This makes
-the utilities quite complex and by now not anymore very maintainable.
-When we wrote these programs, libpng was still in an early stage.
-Therefore, lots of the functionality that we put in our software can now
-be done using transform-functions in libpng.
-
-Finally, to compile these programs, you need to have installed and
-compiled three libraries: libpng, zlib and netpbm. Especially the latter
-makes the whole setup a bit bulky. But that's unavoidable given the many
-features of pnmtopng.
-
-
-What now
---------
-At this moment libpng is in a very stable state and can do much of the
-work done in pnmtopng. Also, pnmtopng needs to be upgraded to the new
-interface of libpng. Hence, it is time for a rewrite from the ground up
-of pnmtopng and pngtopnm. This will happen in the near future (stay
-tuned). The new package will get a different name to distinguish it from
-the old one: PngPlus.
-
-To experiment a bit with the new interface of libpng, I started off with
-a small prototype that contains only the basic functionality. It doesn't
-have any of the options to read or write special chunks and it will do
-no gamma correction. But this makes it also a simple program that is
-quite easy to understand and can serve well as a template for other
-software developments. (By now there are of course a couple of programs,
-like Greg Roelofs' rpng/wpng, that can be used just as good.)
-
-
-Can and can not
----------------
-As this is the small brother of the future PngPlus, I called this fellow
-PngMinus. Because I started this development in good-old Turbo-C, I
-avoided the use the netpbm library, which requires DOS extenders. Again,
-another reason to call it PngMinus (minus netpbm :-). So, part of the
-program are some elementary routines to read / write pgm- and ppm-files.
-It does not read b&w pbm-files.
-
-The downside of this approach is that you can not use them on images
-that require blocks of memory bigger than 64k (the DOS version). For
-larger images you will get an out-of-memory error.
-
-As said before, PngMinus doesn't correct for gamma. When reading
-png-files you can do this just as well by piping the output of png2pnm
-to pnmgamma, one of the standard PbmPlus tools. This same scenario will
-most probably also be followed in the full-blown future PngPlus, with
-the addition of course of the possibility to create gamma-chunks when
-writing png-files.
-
-On the other hand it supports alpha-channels. When reading a png-image
-you can write the alpha-channel into a pgm-file. And when creating an
-RGB+A png-image, you just combine a ppm-file with a corresponding
-pgm-file containing the alpha-channel. When reading, transparency chunks
-are converted into an alpha-channel and from there on treated the same
-way.
-
-Finally you can opt for writing ascii or binary pgm- and ppm-files. When
-the bit-depth is 16, the format will always be ascii.
-
-
-Using it
---------
-To distinguish them from pnmtopng and PngPlus, the utilities are named
-png2pnm and pnm2png (2 instead of to). The input- and output-files can
-be given as parameters or through redirection. Therefore the programs
-can be part of a pipe.
-
-To list the options type "png2pnm -h" or "pnm2png -h".
-
-
-Just like Scandinavian furniture
---------------------------------
-You have to put it together yourself. I did test the software under
-MS-DOS with Turbo-C 3.0 and under RedHat Linux 4.2 with gcc. In both
-cases I used libpng-1.0.4 and zlib-1.1.3. Later versions should be OK,
-however some older libpng versions have a bug in pngmem.c when using
-Turbo-C 3.0 (see below).
-
-You can build it using one of the two makefiles (make -f makefile.###)
-or use the batch/script files pngminus.bat / pngminus.sh. This assumes
-that you have built the libraries in ../libpng and ../zlib. Using Linux,
-make sure that you have built libpng with makefile.std and not
-makefile.linux (also called .lnx in earlier versions of libpng). The
-latter creates a .so shared-library, while the PngMinus makefile assumes
-a normal .a static library.
-
-If you create a ../pngsuite directory and then store the basn####.png
-files from PngSuite (http://www.schaik.com/pngsuite/) in there, you can
-test in one go the proper functioning of PngMinus, see png2pnm.bat and
-pnm2png.bat (or the .sh versions).
-
-
-Warranty
--------
-Please, remember that this was just a small experiment to learn a few
-things. It will have many unforeseen features <vbg>. Who said bugs? Use
-it when you are in need for something simple or when you want to start
-developing your own stuff.
-
-
-The Turbo bug
--------------
-** pngmem.old
-          hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L);
-          hptr += 16L;
-** pngmem.c
-          hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L);
-          hptr = hptr + 16L;
-**
-
-** pngmem.old
-          png_ptr->offset_table_ptr[i] = (png_bytep)hptr;
-          hptr += (png_uint_32)65536L;
-** pngmem.c
-          png_ptr->offset_table_ptr[i] = (png_bytep)hptr;
-          hptr = hptr + 65536L;
-**
-
-
-The end
--------
-Willem van Schaik
-mailto:willem@schaik.com
-http://www.schaik.com/png/
--------
-Oct 1999
-
diff --git a/libpng/contrib/pngminus/makefile.std b/libpng/contrib/pngminus/makefile.std
deleted file mode 100644
index 2fb061b..0000000
--- a/libpng/contrib/pngminus/makefile.std
+++ /dev/null
@@ -1,65 +0,0 @@
-# Makefile for PngMinus (png2pnm and pnm2png)
-# Linux / Unix
-
-#CC=cc
-CC=gcc
-LD=$(CC)
-
-RM=rm -f
-
-#PNGPATH = /usr/local
-#PNGINC = -I$(PNGPATH)/include/libpng12
-#PNGLIB = -L$(PNGPATH)/lib -lpng12
-#PNGLIBS = $(PNGPATH)/lib/libpng12.a
-PNGINC = -I../..
-PNGLIB = -L../.. -lpng
-PNGLIBS = ../../libpng.a
-
-#ZPATH = /usr/local
-#ZINC = -I$(ZPATH)/include
-#ZLIB = -L$(ZPATH)/lib -lz
-#ZLIBS = $(ZPATH)/lib/libz.a
-ZINC = -I../../../zlib
-ZLIB = -L../../../zlib -lz
-ZLIBS = ../../../zlib/libz.a
-
-CFLAGS=-O3 $(PNGINC) $(ZINC)
-LDFLAGS=$(PNGLIB) $(ZLIB)
-LDFLAGSS=$(PNGLIBS) $(ZLIBS)
-C=.c
-O=.o
-L=.a
-E=
-
-# dependencies
-
-#all: png2pnm$(E) pnm2png$(E)
-all: png2pnm$(E) pnm2png$(E) png2pnm-static$(E) pnm2png-static$(E)
-
-png2pnm$(O): png2pnm$(C)
-	$(CC) -c $(CFLAGS) png2pnm$(C)
-
-png2pnm$(E): png2pnm$(O)
-	$(LD) -o png2pnm$(E) png2pnm$(O) $(LDFLAGS) -lm
-
-png2pnm-static$(E): png2pnm$(O)
-	$(LD) -o png2pnm-static$(E) png2pnm$(O) $(LDFLAGSS) -lm
-
-pnm2png$(O): pnm2png$(C)
-	$(CC) -c $(CFLAGS) pnm2png$(C)
-
-pnm2png$(E): pnm2png$(O)
-	$(LD) -o pnm2png$(E) pnm2png$(O) $(LDFLAGS) -lm
-
-pnm2png-static$(E): pnm2png$(O)
-	$(LD) -o pnm2png-static$(E) pnm2png$(O) $(LDFLAGSS) -lm
-
-clean:
-	$(RM) png2pnm$(O)
-	$(RM) pnm2png$(O)
-	$(RM) png2pnm$(E)
-	$(RM) pnm2png$(E)
-	$(RM) png2pnm-static$(E)
-	$(RM) pnm2png-static$(E)
-
-# End of makefile for png2pnm / pnm2png
diff --git a/libpng/contrib/pngminus/makefile.tc3 b/libpng/contrib/pngminus/makefile.tc3
deleted file mode 100644
index 404f18d..0000000
--- a/libpng/contrib/pngminus/makefile.tc3
+++ /dev/null
@@ -1,38 +0,0 @@
-# Makefile for PngMinus (png2pnm and pnm2png)
-# TurboC++ 3.0
-
-CC=tcc -Ic:\tc3\inc
-LD=tcc -Lc:\tc3\lib
-LB=tlib
-RM=del
-CP=copy
-MODEL=l
-CCFLAGS=-O -m$(MODEL) -I..\libpng -I..\zlib
-LDFLAGS=-m$(MODEL) -L..\libpng -L..\zlib
-C=.c
-O=.obj
-L=.lib
-E=.exe
-
-# dependencies
-
-all: png2pnm$(E) pnm2png$(E)
-
-png2pnm$(O): png2pnm$(C)
-        $(CC) -c $(CCFLAGS) png2pnm$(C)
-
-png2pnm$(E): png2pnm$(O)
-        $(LD) $(LDFLAGS) png2pnm$(O) libpng$(L) zlib$(L)
-
-pnm2png$(O): pnm2png$(C)
-        $(CC) -c $(CCFLAGS) pnm2png$(C)
-
-pnm2png$(E): pnm2png$(O)
-        $(LD) $(LDFLAGS) pnm2png$(O) libpng$(L) zlib$(L)
-
-clean:
-        $(RM) *$(O)
-        $(RM) *$(E)
-
-# End of makefile for png2pnm / pnm2png
-
diff --git a/libpng/contrib/pngminus/makevms.com b/libpng/contrib/pngminus/makevms.com
deleted file mode 100644
index 00561bc..0000000
--- a/libpng/contrib/pngminus/makevms.com
+++ /dev/null
@@ -1,92 +0,0 @@
-$!------------------------------------------------------------------------------
-$! make Contrib programs of libpng under OpenVMS
-$!
-$!
-$! Look for the compiler used
-$!
-$ zlibsrc = "[---.zlib]"
-$ ccopt="/include=(''zlibsrc',[--])"
-$ if f$getsyi("HW_MODEL").ge.1024
-$ then
-$  ccopt = "/prefix=all"+ccopt
-$  comp  = "__decc__=1"
-$  if f$trnlnm("SYS").eqs."" then define sys sys$library:
-$ else
-$  if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs.""
-$   then
-$    if f$trnlnm("SYS").eqs."" then define sys sys$library:
-$    if f$search("SYS$SYSTEM:VAXC.EXE").eqs.""
-$     then
-$      comp  = "__gcc__=1"
-$      CC :== GCC
-$     else
-$      comp = "__vaxc__=1"
-$     endif
-$   else
-$    if f$trnlnm("SYS").eqs."" then define sys decc$library_include:
-$    ccopt = "/decc/prefix=all"+ccopt
-$    comp  = "__decc__=1"
-$  endif
-$ endif
-$ open/write lopt lib.opt
-$ write lopt "[--]libpng.olb/lib"
-$ write lopt "''zlibsrc'libz.olb/lib"
-$ close lopt
-$ open/write xopt x11.opt
-$ write xopt "sys$library:decw$xlibshr.exe/share"
-$ close xopt
-$ write sys$output "Compiling PNG contrib programs ..."
-$   write sys$output "Building pnm2png..."
-$   CALL MAKE pnm2png.OBJ "cc ''CCOPT' pnm2png" -
-	pnm2png.c
-$   call make pnm2png.exe -
-	"LINK pnm2png,lib.opt/opt" -
-	pnm2png.obj
-$   write sys$output "Building png2pnm..."
-$   CALL MAKE png2pnm.OBJ "cc ''CCOPT' png2pnm" -
-	png2pnm.c
-$   call make png2pnm.exe -
-	"LINK png2pnm,lib.opt/opt" -
-	png2pnm.obj
-$ exit
-$!
-$!
-$MAKE: SUBROUTINE   !SUBROUTINE TO CHECK DEPENDENCIES
-$ V = 'F$Verify(0)
-$! P1 = What we are trying to make
-$! P2 = Command to make it
-$! P3 - P8  What it depends on
-$
-$ If F$Search(P1) .Eqs. "" Then Goto Makeit
-$ Time = F$CvTime(F$File(P1,"RDT"))
-$arg=3
-$Loop:
-$       Argument = P'arg
-$       If Argument .Eqs. "" Then Goto Exit
-$       El=0
-$Loop2:
-$       File = F$Element(El," ",Argument)
-$       If File .Eqs. " " Then Goto Endl
-$       AFile = ""
-$Loop3:
-$       OFile = AFile
-$       AFile = F$Search(File)
-$       If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl
-$       If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit
-$       Goto Loop3
-$NextEL:
-$       El = El + 1
-$       Goto Loop2
-$EndL:
-$ arg=arg+1
-$ If arg .Le. 8 Then Goto Loop
-$ Goto Exit
-$
-$Makeit:
-$ VV=F$VERIFY(0)
-$ write sys$output P2
-$ 'P2
-$ VV='F$Verify(VV)
-$Exit:
-$ If V Then Set Verify
-$ENDSUBROUTINE
diff --git a/libpng/contrib/pngminus/png2pnm.bat b/libpng/contrib/pngminus/png2pnm.bat
deleted file mode 100644
index 449cf36..0000000
--- a/libpng/contrib/pngminus/png2pnm.bat
+++ /dev/null
@@ -1,41 +0,0 @@
-REM -- grayscale
-png2pnm.exe -noraw ..\pngsuite\basn0g01.png basn0g01.pgm
-png2pnm.exe -noraw ..\pngsuite\basn0g02.png basn0g02.pgm
-png2pnm.exe -noraw ..\pngsuite\basn0g04.png basn0g04.pgm
-png2pnm.exe -noraw ..\pngsuite\basn0g08.png basn0g08.pgm
-png2pnm.exe -noraw ..\pngsuite\basn0g16.png basn0g16.pgm
-REM -- full-color
-png2pnm.exe -noraw ..\pngsuite\basn2c08.png basn2c08.ppm
-png2pnm.exe -noraw ..\pngsuite\basn2c16.png basn2c16.ppm
-REM -- palletted
-png2pnm.exe -noraw ..\pngsuite\basn3p01.png basn3p01.ppm
-png2pnm.exe -noraw ..\pngsuite\basn3p02.png basn3p02.ppm
-png2pnm.exe -noraw ..\pngsuite\basn3p04.png basn3p04.ppm
-png2pnm.exe -noraw ..\pngsuite\basn3p08.png basn3p08.ppm
-REM -- gray with alpha-channel
-png2pnm.exe -noraw ..\pngsuite\basn4a08.png basn4a08.pgm
-png2pnm.exe -noraw ..\pngsuite\basn4a16.png basn4a16.pgm
-REM -- color with alpha-channel
-png2pnm.exe -noraw -alpha basn6a08.pgm ..\pngsuite\basn6a08.png basn6a08.ppm
-png2pnm.exe -noraw -alpha basn6a16.pgm ..\pngsuite\basn6a16.png basn6a16.ppm
-REM -- grayscale
-png2pnm.exe -raw ..\pngsuite\basn0g01.png rawn0g01.pgm
-png2pnm.exe -raw ..\pngsuite\basn0g02.png rawn0g02.pgm
-png2pnm.exe -raw ..\pngsuite\basn0g04.png rawn0g04.pgm
-png2pnm.exe -raw ..\pngsuite\basn0g08.png rawn0g08.pgm
-png2pnm.exe -raw ..\pngsuite\basn0g16.png rawn0g16.pgm
-REM -- full-color
-png2pnm.exe -raw ..\pngsuite\basn2c08.png rawn2c08.ppm
-png2pnm.exe -raw ..\pngsuite\basn2c16.png rawn2c16.ppm
-REM -- palletted
-png2pnm.exe -raw ..\pngsuite\basn3p01.png rawn3p01.ppm
-png2pnm.exe -raw ..\pngsuite\basn3p02.png rawn3p02.ppm
-png2pnm.exe -raw ..\pngsuite\basn3p04.png rawn3p04.ppm
-png2pnm.exe -raw ..\pngsuite\basn3p08.png rawn3p08.ppm
-REM -- gray with alpha-channel
-png2pnm.exe -raw ..\pngsuite\basn4a08.png rawn4a08.pgm
-png2pnm.exe -raw ..\pngsuite\basn4a16.png rawn4a16.pgm
-REM -- color with alpha-channel
-png2pnm.exe -noraw -alpha rawn6a08.pgm ..\pngsuite\basn6a08.png rawn6a08.ppm
-png2pnm.exe -noraw -alpha rawn6a16.pgm ..\pngsuite\basn6a16.png rawn6a16.ppm
-
diff --git a/libpng/contrib/pngminus/png2pnm.c b/libpng/contrib/pngminus/png2pnm.c
deleted file mode 100644
index a95acfa..0000000
--- a/libpng/contrib/pngminus/png2pnm.c
+++ /dev/null
@@ -1,430 +0,0 @@
-/*
- *  png2pnm.c --- conversion from PNG-file to PGM/PPM-file
- *  copyright (C) 1999 by Willem van Schaik <willem@schaik.com>
- *
- *  version 1.0 - 1999.10.15 - First version.
- *
- *  Permission to use, copy, modify, and distribute this software and
- *  its documentation for any purpose and without fee is hereby granted,
- *  provided that the above copyright notice appear in all copies and
- *  that both that copyright notice and this permission notice appear in
- *  supporting documentation. This software is provided "as is" without
- *  express or implied warranty.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#ifdef __TURBOC__
-#include <mem.h>
-#include <fcntl.h>
-#endif
-
-#ifndef BOOL
-#define BOOL unsigned char
-#endif
-#ifndef TRUE
-#define TRUE (BOOL) 1
-#endif
-#ifndef FALSE
-#define FALSE (BOOL) 0
-#endif
-
-#ifdef __TURBOC__
-#define STDIN  0
-#define STDOUT 1
-#define STDERR 2
-#endif
-
-/* to make png2pnm verbose so we can find problems (needs to be before png.h) */
-#ifndef PNG_DEBUG
-#define PNG_DEBUG 0
-#endif
-
-#include "png.h"
-
-/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
-#ifndef png_jmpbuf
-#  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
-#endif
-
-/* function prototypes */
-
-int  main (int argc, char *argv[]);
-void usage ();
-BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha);
-
-/*
- *  main
- */
-
-int main(int argc, char *argv[])
-{
-  FILE *fp_rd = stdin;
-  FILE *fp_wr = stdout;
-  FILE *fp_al = NULL;
-  BOOL raw = TRUE;
-  BOOL alpha = FALSE;
-  int argi;
-
-  for (argi = 1; argi < argc; argi++)
-  {
-    if (argv[argi][0] == '-')
-    {
-      switch (argv[argi][1])
-      {
-        case 'n':
-          raw = FALSE;
-          break;
-        case 'r':
-          raw = TRUE;
-          break;
-        case 'a':
-          alpha = TRUE;
-          argi++;
-          if ((fp_al = fopen (argv[argi], "wb")) == NULL)
-          {
-            fprintf (stderr, "PNM2PNG\n");
-            fprintf (stderr, "Error:  can not create alpha-channel file %s\n", argv[argi]);
-            exit (1);
-          }
-          break;
-        case 'h':
-        case '?':
-          usage();
-          exit(0);
-          break;
-        default:
-          fprintf (stderr, "PNG2PNM\n");
-          fprintf (stderr, "Error:  unknown option %s\n", argv[argi]);
-          usage();
-          exit(1);
-          break;
-      } /* end switch */
-    }
-    else if (fp_rd == stdin)
-    {
-      if ((fp_rd = fopen (argv[argi], "rb")) == NULL)
-      {
-             fprintf (stderr, "PNG2PNM\n");
-            fprintf (stderr, "Error:  file %s does not exist\n", argv[argi]);
-            exit (1);
-      }
-    }
-    else if (fp_wr == stdout)
-    {
-      if ((fp_wr = fopen (argv[argi], "wb")) == NULL)
-      {
-        fprintf (stderr, "PNG2PNM\n");
-        fprintf (stderr, "Error:  can not create file %s\n", argv[argi]);
-        exit (1);
-      }
-    }
-    else
-    {
-      fprintf (stderr, "PNG2PNM\n");
-      fprintf (stderr, "Error:  too many parameters\n");
-      usage();
-      exit(1);
-    }
-  } /* end for */
-
-#ifdef __TURBOC__
-  /* set stdin/stdout if required to binary */
-  if (fp_rd == stdin)
-  {
-    setmode (STDIN, O_BINARY);
-  }
-  if ((raw) && (fp_wr == stdout))
-  {
-    setmode (STDOUT, O_BINARY);
-  }
-#endif
-
-  /* call the conversion program itself */
-  if (png2pnm (fp_rd, fp_wr, fp_al, raw, alpha) == FALSE)
-  {
-    fprintf (stderr, "PNG2PNM\n");
-    fprintf (stderr, "Error:  unsuccessful convertion of PNG-image\n");
-    exit(1);
-  }
-
-  /* close input file */
-  fclose (fp_rd);
-  /* close output file */
-  fclose (fp_wr);
-  /* close alpha file */
-  if (alpha)
-    fclose (fp_al);
-
-  return 0;
-}
-
-/*
- *  usage
- */
-
-void usage()
-{
-  fprintf (stderr, "PNG2PNM\n");
-  fprintf (stderr, "   by Willem van Schaik, 1999\n");
-#ifdef __TURBOC__
-  fprintf (stderr, "   for Turbo-C and Borland-C compilers\n");
-#else
-  fprintf (stderr, "   for Linux (and Unix) compilers\n");
-#endif
-  fprintf (stderr, "Usage:  png2pnm [options] <file>.png [<file>.pnm]\n");
-  fprintf (stderr, "   or:  ... | png2pnm [options]\n");
-  fprintf (stderr, "Options:\n");
-  fprintf (stderr, "   -r[aw]   write pnm-file in binary format (P4/P5/P6) (default)\n");
-  fprintf (stderr, "   -n[oraw] write pnm-file in ascii format (P1/P2/P3)\n");
-  fprintf (stderr, "   -a[lpha] <file>.pgm write PNG alpha channel as pgm-file\n");
-  fprintf (stderr, "   -h | -?  print this help-information\n");
-}
-
-/*
- *  png2pnm
- */
-
-BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha)
-{
-  png_struct    *png_ptr = NULL;
-  png_info        *info_ptr = NULL;
-  png_byte      buf[8];
-  png_byte      *png_pixels = NULL;
-  png_byte      **row_pointers = NULL;
-  png_byte      *pix_ptr = NULL;
-  png_uint_32   row_bytes;
-
-  png_uint_32   width;
-  png_uint_32   height;
-  int           bit_depth;
-  int           channels;
-  int           color_type;
-  int           alpha_present;
-  int           row, col;
-  int           ret;
-  int           i;
-  long          dep_16;
-
-  /* read and check signature in PNG file */
-  ret = fread (buf, 1, 8, png_file);
-  if (ret != 8)
-    return FALSE;
-
-  ret = png_sig_cmp (buf, 0, 8);
-  if (ret)
-    return FALSE;
-
-  /* create png and info structures */
-
-  png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING,
-    NULL, NULL, NULL);
-  if (!png_ptr)
-    return FALSE;   /* out of memory */
-
-  info_ptr = png_create_info_struct (png_ptr);
-  if (!info_ptr)
-  {
-    png_destroy_read_struct (&png_ptr, NULL, NULL);
-    return FALSE;   /* out of memory */
-  }
-
-  if (setjmp (png_jmpbuf(png_ptr)))
-  {
-    png_destroy_read_struct (&png_ptr, &info_ptr, NULL);
-    return FALSE;
-  }
-
-  /* set up the input control for C streams */
-  png_init_io (png_ptr, png_file);
-  png_set_sig_bytes (png_ptr, 8);  /* we already read the 8 signature bytes */
-
-  /* read the file information */
-  png_read_info (png_ptr, info_ptr);
-
-  /* get size and bit-depth of the PNG-image */
-  png_get_IHDR (png_ptr, info_ptr,
-    &width, &height, &bit_depth, &color_type,
-    NULL, NULL, NULL);
-
-  /* set-up the transformations */
-
-  /* transform paletted images into full-color rgb */
-  if (color_type == PNG_COLOR_TYPE_PALETTE)
-    png_set_expand (png_ptr);
-  /* expand images to bit-depth 8 (only applicable for grayscale images) */
-  if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
-    png_set_expand (png_ptr);
-  /* transform transparency maps into full alpha-channel */
-  if (png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS))
-    png_set_expand (png_ptr);
-
-#ifdef NJET
-  /* downgrade 16-bit images to 8 bit */
-  if (bit_depth == 16)
-    png_set_strip_16 (png_ptr);
-  /* transform grayscale images into full-color */
-  if (color_type == PNG_COLOR_TYPE_GRAY ||
-    color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
-    png_set_gray_to_rgb (png_ptr);
-  /* only if file has a file gamma, we do a correction */
-  if (png_get_gAMA (png_ptr, info_ptr, &file_gamma))
-    png_set_gamma (png_ptr, (double) 2.2, file_gamma);
-#endif
-
-  /* all transformations have been registered; now update info_ptr data,
-   * get rowbytes and channels, and allocate image memory */
-
-  png_read_update_info (png_ptr, info_ptr);
-
-  /* get the new color-type and bit-depth (after expansion/stripping) */
-  png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
-    NULL, NULL, NULL);
-
-  /* check for 16-bit files */
-  if (bit_depth == 16)
-  {
-    raw = FALSE;
-#ifdef __TURBOC__
-    pnm_file->flags &= ~((unsigned) _F_BIN);
-#endif
-  }
-
-  /* calculate new number of channels and store alpha-presence */
-  if (color_type == PNG_COLOR_TYPE_GRAY)
-    channels = 1;
-  else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
-    channels = 2;
-  else if (color_type == PNG_COLOR_TYPE_RGB)
-    channels = 3;
-  else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA)
-    channels = 4;
-  else
-    channels = 0; /* should never happen */
-  alpha_present = (channels - 1) % 2;
-
-  /* check if alpha is expected to be present in file */
-  if (alpha && !alpha_present)
-  {
-    fprintf (stderr, "PNG2PNM\n");
-    fprintf (stderr, "Error:  PNG-file doesn't contain alpha channel\n");
-    exit (1);
-  }
-
-  /* row_bytes is the width x number of channels x (bit-depth / 8) */
-  row_bytes = png_get_rowbytes (png_ptr, info_ptr);
-
-  if ((png_pixels = (png_byte *) malloc (row_bytes * height * sizeof (png_byte))) == NULL) {
-    png_destroy_read_struct (&png_ptr, &info_ptr, NULL);
-    return FALSE;
-  }
-
-  if ((row_pointers = (png_byte **) malloc (height * sizeof (png_bytep))) == NULL)
-  {
-    png_destroy_read_struct (&png_ptr, &info_ptr, NULL);
-    free (png_pixels);
-    png_pixels = NULL;
-    return FALSE;
-  }
-
-  /* set the individual row_pointers to point at the correct offsets */
-  for (i = 0; i < (height); i++)
-    row_pointers[i] = png_pixels + i * row_bytes;
-
-  /* now we can go ahead and just read the whole image */
-  png_read_image (png_ptr, row_pointers);
-
-  /* read rest of file, and get additional chunks in info_ptr - REQUIRED */
-  png_read_end (png_ptr, info_ptr);
-
-  /* clean up after the read, and free any memory allocated - REQUIRED */
-  png_destroy_read_struct (&png_ptr, &info_ptr, (png_infopp) NULL);
-
-  /* write header of PNM file */
-
-  if ((color_type == PNG_COLOR_TYPE_GRAY) ||
-      (color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
-  {
-    fprintf (pnm_file, "%s\n", (raw) ? "P5" : "P2");
-    fprintf (pnm_file, "%d %d\n", (int) width, (int) height);
-    fprintf (pnm_file, "%ld\n", ((1L << (int) bit_depth) - 1L));
-  }
-  else if ((color_type == PNG_COLOR_TYPE_RGB) ||
-           (color_type == PNG_COLOR_TYPE_RGB_ALPHA))
-  {
-    fprintf (pnm_file, "%s\n", (raw) ? "P6" : "P3");
-    fprintf (pnm_file, "%d %d\n", (int) width, (int) height);
-    fprintf (pnm_file, "%ld\n", ((1L << (int) bit_depth) - 1L));
-  }
-
-  /* write header of PGM file with alpha channel */
-
-  if ((alpha) &&
-      ((color_type == PNG_COLOR_TYPE_GRAY_ALPHA) ||
-       (color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
-  {
-    fprintf (alpha_file, "%s\n", (raw) ? "P5" : "P2");
-    fprintf (alpha_file, "%d %d\n", (int) width, (int) height);
-    fprintf (alpha_file, "%ld\n", ((1L << (int) bit_depth) - 1L));
-  }
-
-  /* write data to PNM file */
-  pix_ptr = png_pixels;
-
-  for (row = 0; row < height; row++)
-  {
-    for (col = 0; col < width; col++)
-    {
-      for (i = 0; i < (channels - alpha_present); i++)
-      {
-        if (raw)
-          fputc ((int) *pix_ptr++ , pnm_file);
-        else
-          if (bit_depth == 16){
-            dep_16 = (long) *pix_ptr++;
-            fprintf (pnm_file, "%ld ", (dep_16 << 8) + ((long) *pix_ptr++));
-          }
-          else
-            fprintf (pnm_file, "%ld ", (long) *pix_ptr++);
-      }
-      if (alpha_present)
-      {
-        if (!alpha)
-        {
-          pix_ptr++; /* alpha */
-          if (bit_depth == 16)
-            pix_ptr++;
-        }
-        else /* output alpha-channel as pgm file */
-        {
-          if (raw)
-            fputc ((int) *pix_ptr++ , alpha_file);
-          else
-            if (bit_depth == 16){
-              dep_16 = (long) *pix_ptr++;
-              fprintf (alpha_file, "%ld ", (dep_16 << 8) + (long) *pix_ptr++);
-            }  
-            else
-              fprintf (alpha_file, "%ld ", (long) *pix_ptr++);
-        }
-      } /* if alpha_present */
-
-      if (!raw)
-        if (col % 4 == 3)
-          fprintf (pnm_file, "\n");
-    } /* end for col */
-
-    if (!raw)
-      if (col % 4 != 0)
-        fprintf (pnm_file, "\n");
-  } /* end for row */
-
-  if (row_pointers != (unsigned char**) NULL)
-    free (row_pointers);
-  if (png_pixels != (unsigned char*) NULL)
-    free (png_pixels);
-
-  return TRUE;
-
-} /* end of source */
-
diff --git a/libpng/contrib/pngminus/png2pnm.sh b/libpng/contrib/pngminus/png2pnm.sh
deleted file mode 100644
index b1c0537..0000000
--- a/libpng/contrib/pngminus/png2pnm.sh
+++ /dev/null
@@ -1,42 +0,0 @@
-#!/bin/sh
-# -- grayscale
-./png2pnm -noraw ../pngsuite/basn0g01.png basn0g01.pgm
-./png2pnm -noraw ../pngsuite/basn0g02.png basn0g02.pgm
-./png2pnm -noraw ../pngsuite/basn0g04.png basn0g04.pgm
-./png2pnm -noraw ../pngsuite/basn0g08.png basn0g08.pgm
-./png2pnm -noraw ../pngsuite/basn0g16.png basn0g16.pgm
-# -- full-color
-./png2pnm -noraw ../pngsuite/basn2c08.png basn2c08.ppm
-./png2pnm -noraw ../pngsuite/basn2c16.png basn2c16.ppm
-# -- palletted
-./png2pnm -noraw ../pngsuite/basn3p01.png basn3p01.ppm
-./png2pnm -noraw ../pngsuite/basn3p02.png basn3p02.ppm
-./png2pnm -noraw ../pngsuite/basn3p04.png basn3p04.ppm
-./png2pnm -noraw ../pngsuite/basn3p08.png basn3p08.ppm
-# -- gray with alpha-channel
-./png2pnm -noraw ../pngsuite/basn4a08.png basn4a08.pgm
-./png2pnm -noraw ../pngsuite/basn4a16.png basn4a16.pgm
-# -- color with alpha-channel
-./png2pnm -noraw -alpha basn6a08.pgm ../pngsuite/basn6a08.png basn6a08.ppm
-./png2pnm -noraw -alpha basn6a16.pgm ../pngsuite/basn6a16.png basn6a16.ppm
-# -- grayscale
-./png2pnm -raw ../pngsuite/basn0g01.png rawn0g01.pgm
-./png2pnm -raw ../pngsuite/basn0g02.png rawn0g02.pgm
-./png2pnm -raw ../pngsuite/basn0g04.png rawn0g04.pgm
-./png2pnm -raw ../pngsuite/basn0g08.png rawn0g08.pgm
-./png2pnm -raw ../pngsuite/basn0g16.png rawn0g16.pgm
-# -- full-color
-./png2pnm -raw ../pngsuite/basn2c08.png rawn2c08.ppm
-./png2pnm -raw ../pngsuite/basn2c16.png rawn2c16.ppm
-# -- palletted
-./png2pnm -raw ../pngsuite/basn3p01.png rawn3p01.ppm
-./png2pnm -raw ../pngsuite/basn3p02.png rawn3p02.ppm
-./png2pnm -raw ../pngsuite/basn3p04.png rawn3p04.ppm
-./png2pnm -raw ../pngsuite/basn3p08.png rawn3p08.ppm
-# -- gray with alpha-channel
-./png2pnm -raw ../pngsuite/basn4a08.png rawn4a08.pgm
-./png2pnm -raw ../pngsuite/basn4a16.png rawn4a16.pgm
-# -- color with alpha-channel
-./png2pnm -noraw -alpha rawn6a08.pgm ../pngsuite/basn6a08.png rawn6a08.ppm
-./png2pnm -noraw -alpha rawn6a16.pgm ../pngsuite/basn6a16.png rawn6a16.ppm
-
diff --git a/libpng/contrib/pngminus/pngminus.bat b/libpng/contrib/pngminus/pngminus.bat
deleted file mode 100644
index 911bb8d..0000000
--- a/libpng/contrib/pngminus/pngminus.bat
+++ /dev/null
@@ -1,4 +0,0 @@
-make -f makefile.tc3
-call png2pnm.bat
-call pnm2png.bat
-
diff --git a/libpng/contrib/pngminus/pngminus.sh b/libpng/contrib/pngminus/pngminus.sh
deleted file mode 100644
index 2a0a9d8..0000000
--- a/libpng/contrib/pngminus/pngminus.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/sh
-make -f makefile.std
-sh png2pnm.sh
-sh pnm2png.sh
-
diff --git a/libpng/contrib/pngminus/pnm2png.bat b/libpng/contrib/pngminus/pnm2png.bat
deleted file mode 100644
index f756cb8..0000000
--- a/libpng/contrib/pngminus/pnm2png.bat
+++ /dev/null
@@ -1,41 +0,0 @@
-REM -- grayscale
-pnm2png.exe basn0g01.pgm basn0g01.png
-pnm2png.exe basn0g02.pgm basn0g02.png
-pnm2png.exe basn0g04.pgm basn0g04.png
-pnm2png.exe basn0g08.pgm basn0g08.png
-pnm2png.exe basn0g16.pgm basn0g16.png
-REM -- full-color
-pnm2png.exe basn2c08.ppm basn2c08.png
-pnm2png.exe basn2c16.ppm basn2c16.png
-REM -- palletted
-pnm2png.exe basn3p01.ppm basn3p01.png
-pnm2png.exe basn3p02.ppm basn3p02.png
-pnm2png.exe basn3p04.ppm basn3p04.png
-pnm2png.exe basn3p08.ppm basn3p08.png
-REM -- gray with alpha-channel
-pnm2png.exe -alpha basn6a08.pgm basn4a08.pgm basn4a08.png
-pnm2png.exe -alpha basn6a16.pgm basn4a16.pgm basn4a16.png
-REM -- color with alpha-channel
-pnm2png.exe -alpha basn6a08.pgm basn6a08.ppm basn6a08.png
-pnm2png.exe -alpha basn6a16.pgm basn6a16.ppm basn6a16.png
-REM -- grayscale
-pnm2png.exe rawn0g01.pgm rawn0g01.png
-pnm2png.exe rawn0g02.pgm rawn0g02.png
-pnm2png.exe rawn0g04.pgm rawn0g04.png
-pnm2png.exe rawn0g08.pgm rawn0g08.png
-pnm2png.exe rawn0g16.pgm rawn0g16.png
-REM -- full-color
-pnm2png.exe rawn2c08.ppm rawn2c08.png
-pnm2png.exe rawn2c16.ppm rawn2c16.png
-REM -- palletted
-pnm2png.exe rawn3p01.ppm rawn3p01.png
-pnm2png.exe rawn3p02.ppm rawn3p02.png
-pnm2png.exe rawn3p04.ppm rawn3p04.png
-pnm2png.exe rawn3p08.ppm rawn3p08.png
-REM -- gray with alpha-channel
-pnm2png.exe -alpha rawn6a08.pgm rawn4a08.pgm rawn4a08.png
-pnm2png.exe -alpha rawn6a16.pgm rawn4a16.pgm rawn4a16.png
-REM -- color with alpha-channel
-pnm2png.exe -alpha rawn6a08.pgm rawn6a08.ppm rawn6a08.png
-pnm2png.exe -alpha rawn6a16.pgm rawn6a16.ppm rawn6a16.png
-
diff --git a/libpng/contrib/pngminus/pnm2png.c b/libpng/contrib/pngminus/pnm2png.c
deleted file mode 100644
index 4cdfad8..0000000
--- a/libpng/contrib/pngminus/pnm2png.c
+++ /dev/null
@@ -1,533 +0,0 @@
-/*
- *  pnm2png.c --- conversion from PBM/PGM/PPM-file to PNG-file
- *  copyright (C) 1999 by Willem van Schaik <willem@schaik.com>
- *
- *  version 1.0 - 1999.10.15 - First version.
- *
- *  Permission to use, copy, modify, and distribute this software and
- *  its documentation for any purpose and without fee is hereby granted,
- *  provided that the above copyright notice appear in all copies and
- *  that both that copyright notice and this permission notice appear in
- *  supporting documentation. This software is provided "as is" without
- *  express or implied warranty.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#ifdef __TURBOC__
-#include <mem.h>
-#include <fcntl.h>
-#endif
-
-#ifndef BOOL
-#define BOOL unsigned char
-#endif
-#ifndef TRUE
-#define TRUE (BOOL) 1
-#endif
-#ifndef FALSE
-#define FALSE (BOOL) 0
-#endif
-
-#define STDIN  0
-#define STDOUT 1
-#define STDERR 2
-
-/* to make pnm2png verbose so we can find problems (needs to be before png.h) */
-#ifndef PNG_DEBUG
-#define PNG_DEBUG 0
-#endif
-
-#include "png.h"
-
-/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
-#ifndef png_jmpbuf
-#  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
-#endif
-
-/* function prototypes */
-
-int  main (int argc, char *argv[]);
-void usage ();
-BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, BOOL alpha);
-void get_token(FILE *pnm_file, char *token);
-png_uint_32 get_data (FILE *pnm_file, int depth);
-png_uint_32 get_value (FILE *pnm_file, int depth);
-
-/*
- *  main
- */
-
-int main(int argc, char *argv[])
-{
-  FILE *fp_rd = stdin;
-  FILE *fp_al = NULL;
-  FILE *fp_wr = stdout;
-  BOOL interlace = FALSE;
-  BOOL alpha = FALSE;
-  int argi;
-
-  for (argi = 1; argi < argc; argi++)
-  {
-    if (argv[argi][0] == '-')
-    {
-      switch (argv[argi][1])
-      {
-        case 'i':
-          interlace = TRUE;
-          break;
-        case 'a':
-          alpha = TRUE;
-          argi++;
-          if ((fp_al = fopen (argv[argi], "rb")) == NULL)
-          {
-            fprintf (stderr, "PNM2PNG\n");
-            fprintf (stderr, "Error:  alpha-channel file %s does not exist\n",
-               argv[argi]);
-            exit (1);
-          }
-          break;
-        case 'h':
-        case '?':
-          usage();
-          exit(0);
-          break;
-        default:
-          fprintf (stderr, "PNM2PNG\n");
-          fprintf (stderr, "Error:  unknown option %s\n", argv[argi]);
-          usage();
-          exit(1);
-          break;
-      } /* end switch */
-    }
-    else if (fp_rd == stdin)
-    {
-      if ((fp_rd = fopen (argv[argi], "rb")) == NULL)
-      {
-        fprintf (stderr, "PNM2PNG\n");
-        fprintf (stderr, "Error:  file %s does not exist\n", argv[argi]);
-        exit (1);
-      }
-    }
-    else if (fp_wr == stdout)
-    {
-      if ((fp_wr = fopen (argv[argi], "wb")) == NULL)
-      {
-        fprintf (stderr, "PNM2PNG\n");
-        fprintf (stderr, "Error:  can not create PNG-file %s\n", argv[argi]);
-        exit (1);
-      }
-    }
-    else
-    {
-      fprintf (stderr, "PNM2PNG\n");
-      fprintf (stderr, "Error:  too many parameters\n");
-      usage();
-      exit (1);
-    }
-  } /* end for */
-
-#ifdef __TURBOC__
-  /* set stdin/stdout to binary, we're reading the PNM always! in binary format */
-  if (fp_rd == stdin)
-  {
-    setmode (STDIN, O_BINARY);
-  }
-  if (fp_wr == stdout)
-  {
-    setmode (STDOUT, O_BINARY);
-  }
-#endif
-
-  /* call the conversion program itself */
-  if (pnm2png (fp_rd, fp_wr, fp_al, interlace, alpha) == FALSE)
-  {
-    fprintf (stderr, "PNM2PNG\n");
-    fprintf (stderr, "Error:  unsuccessful converting to PNG-image\n");
-    exit (1);
-  }
-
-  /* close input file */
-  fclose (fp_rd);
-  /* close output file */
-  fclose (fp_wr);
-  /* close alpha file */
-  if (alpha)
-    fclose (fp_al);
-
-  return 0;
-}
-
-/*
- *  usage
- */
-
-void usage()
-{
-  fprintf (stderr, "PNM2PNG\n");
-  fprintf (stderr, "   by Willem van Schaik, 1999\n");
-#ifdef __TURBOC__
-  fprintf (stderr, "   for Turbo-C and Borland-C compilers\n");
-#else
-  fprintf (stderr, "   for Linux (and Unix) compilers\n");
-#endif
-  fprintf (stderr, "Usage:  pnm2png [options] <file>.<pnm> [<file>.png]\n");
-  fprintf (stderr, "   or:  ... | pnm2png [options]\n");
-  fprintf (stderr, "Options:\n");
-  fprintf (stderr, "   -i[nterlace]   write png-file with interlacing on\n");
-  fprintf (stderr, "   -a[lpha] <file>.pgm read PNG alpha channel as pgm-file\n");
-  fprintf (stderr, "   -h | -?  print this help-information\n");
-}
-
-/*
- *  pnm2png
- */
-
-BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace, BOOL alpha)
-{
-  png_struct    *png_ptr = NULL;
-  png_info      *info_ptr = NULL;
-  png_byte      *png_pixels = NULL;
-  png_byte      **row_pointers = NULL;
-  png_byte      *pix_ptr = NULL;
-  png_uint_32   row_bytes;
-
-  char          type_token[16];
-  char          width_token[16];
-  char          height_token[16];
-  char          maxval_token[16];
-  int           color_type;
-  png_uint_32   width, alpha_width;
-  png_uint_32   height, alpha_height;
-  png_uint_32   maxval;
-  int           bit_depth = 0;
-  int           channels;
-  int           alpha_depth = 0;
-  int           alpha_present;
-  int           row, col;
-  BOOL          raw, alpha_raw = FALSE;
-  png_uint_32   tmp16;
-  int           i;
-
-  /* read header of PNM file */
-
-  get_token(pnm_file, type_token);
-  if (type_token[0] != 'P')
-  {
-    return FALSE;
-  }
-  else if ((type_token[1] == '1') || (type_token[1] == '4'))
-  {
-    raw = (type_token[1] == '4');
-    color_type = PNG_COLOR_TYPE_GRAY;
-    bit_depth = 1;
-  }
-  else if ((type_token[1] == '2') || (type_token[1] == '5'))
-  {
-    raw = (type_token[1] == '5');
-    color_type = PNG_COLOR_TYPE_GRAY;
-    get_token(pnm_file, width_token);
-    sscanf (width_token, "%lu", &width);
-    get_token(pnm_file, height_token);
-    sscanf (height_token, "%lu", &height);
-    get_token(pnm_file, maxval_token);
-    sscanf (maxval_token, "%lu", &maxval);
-    if (maxval <= 1)
-      bit_depth = 1;
-    else if (maxval <= 3)
-      bit_depth = 2;
-    else if (maxval <= 15)
-      bit_depth = 4;
-    else if (maxval <= 255)
-      bit_depth = 8;
-    else /* if (maxval <= 65535) */
-      bit_depth = 16;
-  }
-  else if ((type_token[1] == '3') || (type_token[1] == '6'))
-  {
-    raw = (type_token[1] == '6');
-    color_type = PNG_COLOR_TYPE_RGB;
-    get_token(pnm_file, width_token);
-    sscanf (width_token, "%lu", &width);
-    get_token(pnm_file, height_token);
-    sscanf (height_token, "%lu", &height);
-    get_token(pnm_file, maxval_token);
-    sscanf (maxval_token, "%lu", &maxval);
-    if (maxval <= 1)
-      bit_depth = 1;
-    else if (maxval <= 3)
-      bit_depth = 2;
-    else if (maxval <= 15)
-      bit_depth = 4;
-    else if (maxval <= 255)
-      bit_depth = 8;
-    else /* if (maxval <= 65535) */
-      bit_depth = 16;
-  }
-  else
-  {
-    return FALSE;
-  }
-
-  /* read header of PGM file with alpha channel */
-
-  if (alpha)
-  {
-    if (color_type == PNG_COLOR_TYPE_GRAY)
-      color_type = PNG_COLOR_TYPE_GRAY_ALPHA;
-    if (color_type == PNG_COLOR_TYPE_RGB)
-      color_type = PNG_COLOR_TYPE_RGB_ALPHA;
-
-    get_token(alpha_file, type_token);
-    if (type_token[0] != 'P')
-    {
-      return FALSE;
-    }
-    else if ((type_token[1] == '2') || (type_token[1] == '5'))
-    {
-      alpha_raw = (type_token[1] == '5');
-      get_token(alpha_file, width_token);
-      sscanf (width_token, "%lu", &alpha_width);
-      if (alpha_width != width)
-        return FALSE;
-      get_token(alpha_file, height_token);
-      sscanf (height_token, "%lu", &alpha_height);
-      if (alpha_height != height)
-        return FALSE;
-      get_token(alpha_file, maxval_token);
-      sscanf (maxval_token, "%lu", &maxval);
-      if (maxval <= 1)
-        alpha_depth = 1;
-      else if (maxval <= 3)
-        alpha_depth = 2;
-      else if (maxval <= 15)
-        alpha_depth = 4;
-      else if (maxval <= 255)
-        alpha_depth = 8;
-      else /* if (maxval <= 65535) */
-        alpha_depth = 16;
-      if (alpha_depth != bit_depth)
-        return FALSE;
-    }
-    else
-    {
-      return FALSE;
-    }
-  } /* end if alpha */
-
-  /* calculate the number of channels and store alpha-presence */
-  if (color_type == PNG_COLOR_TYPE_GRAY)
-    channels = 1;
-  else if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
-    channels = 2;
-  else if (color_type == PNG_COLOR_TYPE_RGB)
-    channels = 3;
-  else if (color_type == PNG_COLOR_TYPE_RGB_ALPHA)
-    channels = 4;
-  else
-    channels = 0; /* should not happen */
-
-  alpha_present = (channels - 1) % 2;
-
-  /* row_bytes is the width x number of channels x (bit-depth / 8) */
-  row_bytes = width * channels * ((bit_depth <= 8) ? 1 : 2);
-
-  if ((png_pixels = (png_byte *) malloc (row_bytes * height * sizeof (png_byte))) == NULL)
-    return FALSE;
-
-  /* read data from PNM file */
-  pix_ptr = png_pixels;
-
-  for (row = 0; row < height; row++)
-  {
-    for (col = 0; col < width; col++)
-    {
-      for (i = 0; i < (channels - alpha_present); i++)
-      {
-        if (raw)
-          *pix_ptr++ = get_data (pnm_file, bit_depth);
-        else
-          if (bit_depth <= 8)
-            *pix_ptr++ = get_value (pnm_file, bit_depth);
-          else
-          {
-            tmp16 = get_value (pnm_file, bit_depth);
-            *pix_ptr = (png_byte) ((tmp16 >> 8) & 0xFF);
-            pix_ptr++;
-            *pix_ptr = (png_byte) (tmp16 & 0xFF);
-            pix_ptr++;
-          }
-      }
-
-      if (alpha) /* read alpha-channel from pgm file */
-      {
-        if (alpha_raw)
-          *pix_ptr++ = get_data (alpha_file, alpha_depth);
-        else
-          if (alpha_depth <= 8)
-            *pix_ptr++ = get_value (alpha_file, bit_depth);
-          else
-          {
-            tmp16 = get_value (alpha_file, bit_depth);
-            *pix_ptr++ = (png_byte) ((tmp16 >> 8) & 0xFF);
-            *pix_ptr++ = (png_byte) (tmp16 & 0xFF);
-          }
-      } /* if alpha */
-
-    } /* end for col */
-  } /* end for row */
-
-  /* prepare the standard PNG structures */
-  png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
-  if (!png_ptr)
-  {
-    return FALSE;
-  }
-  info_ptr = png_create_info_struct (png_ptr);
-  if (!info_ptr)
-  {
-    png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
-    return FALSE;
-  }
-
-  /* setjmp() must be called in every function that calls a PNG-reading libpng function */
-  if (setjmp (png_jmpbuf(png_ptr)))
-  {
-    png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
-    return FALSE;
-  }
-
-  /* initialize the png structure */
-  png_init_io (png_ptr, png_file);
-
-  /* we're going to write more or less the same PNG as the input file */
-  png_set_IHDR (png_ptr, info_ptr, width, height, bit_depth, color_type,
-    (!interlace) ? PNG_INTERLACE_NONE : PNG_INTERLACE_ADAM7,
-    PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
-
-  /* write the file header information */
-  png_write_info (png_ptr, info_ptr);
-
-  /* if needed we will allocate memory for an new array of row-pointers */
-  if (row_pointers == (unsigned char**) NULL)
-  {
-    if ((row_pointers = (png_byte **) malloc (height * sizeof (png_bytep))) == NULL)
-    {
-      png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
-      return FALSE;
-    }
-  }
-
-  /* set the individual row_pointers to point at the correct offsets */
-  for (i = 0; i < (height); i++)
-    row_pointers[i] = png_pixels + i * row_bytes;
-
-  /* write out the entire image data in one call */
-  png_write_image (png_ptr, row_pointers);
-
-  /* write the additional chuncks to the PNG file (not really needed) */
-  png_write_end (png_ptr, info_ptr);
-
-  /* clean up after the write, and free any memory allocated */
-  png_destroy_write_struct (&png_ptr, (png_infopp) NULL);
-
-  if (row_pointers != (unsigned char**) NULL)
-    free (row_pointers);
-  if (png_pixels != (unsigned char*) NULL)
-    free (png_pixels);
-
-  return TRUE;
-} /* end of pnm2png */
-
-/*
- * get_token() - gets the first string after whitespace
- */
-
-void get_token(FILE *pnm_file, char *token)
-{
-  int i = 0;
-
-  /* remove white-space */
-  do
-  {
-    token[i] = (unsigned char) fgetc (pnm_file);
-  }
-  while ((token[i] == '\n') || (token[i] == '\r') || (token[i] == ' '));
-
-  /* read string */
-  do
-  {
-    i++;
-    token[i] = (unsigned char) fgetc (pnm_file);
-  }
-  while ((token[i] != '\n') && (token[i] != '\r') && (token[i] != ' '));
-
-  token[i] = '\0';
-
-  return;
-}
-
-/*
- * get_data() - takes first byte and converts into next pixel value,
- *        taking as much bits as defined by bit-depth and
- *        using the bit-depth to fill up a byte (0Ah -> AAh)
- */
-
-png_uint_32 get_data (FILE *pnm_file, int depth)
-{
-  static int bits_left = 0;
-  static int old_value = 0;
-  static int mask = 0;
-  int i;
-  png_uint_32 ret_value;
-
-  if (mask == 0)
-    for (i = 0; i < depth; i++)
-      mask = (mask >> 1) | 0x80;
-
-  if (bits_left <= 0)
-  {
-    old_value = fgetc (pnm_file);
-    bits_left = 8;
-  }
-
-  ret_value = old_value & mask;
-  for (i = 1; i < (8 / depth); i++)
-    ret_value = ret_value || (ret_value >> depth);
-
-  old_value = (old_value << depth) & 0xFF;
-  bits_left -= depth;
-
-  return ret_value;
-}
-
-/*
- * get_value() - takes first (numeric) string and converts into number,
- *         using the bit-depth to fill up a byte (0Ah -> AAh)
- */
-
-png_uint_32 get_value (FILE *pnm_file, int depth)
-{
-  static png_uint_32 mask = 0;
-  png_byte token[16];
-  png_uint_32 ret_value;
-  int i = 0;
-
-  if (mask == 0)
-    for (i = 0; i < depth; i++)
-      mask = (mask << 1) | 0x01;
-
-  get_token (pnm_file, (char *) token);
-  sscanf ((const char *) token, "%lu", &ret_value);
-
-  ret_value &= mask;
-
-  if (depth < 8)
-    for (i = 0; i < (8 / depth); i++)
-      ret_value = (ret_value << depth) || ret_value;
-
-  return ret_value;
-}
-
-/* end of source */
-
diff --git a/libpng/contrib/pngminus/pnm2png.sh b/libpng/contrib/pngminus/pnm2png.sh
deleted file mode 100644
index d79df2f..0000000
--- a/libpng/contrib/pngminus/pnm2png.sh
+++ /dev/null
@@ -1,42 +0,0 @@
-#!/bin/sh
-# -- grayscale
-./pnm2png basn0g01.pgm basn0g01.png
-./pnm2png basn0g02.pgm basn0g02.png
-./pnm2png basn0g04.pgm basn0g04.png
-./pnm2png basn0g08.pgm basn0g08.png
-./pnm2png basn0g16.pgm basn0g16.png
-# -- full-color
-./pnm2png basn2c08.ppm basn2c08.png
-./pnm2png basn2c16.ppm basn2c16.png
-# -- palletted
-./pnm2png basn3p01.ppm basn3p01.png
-./pnm2png basn3p02.ppm basn3p02.png
-./pnm2png basn3p04.ppm basn3p04.png
-./pnm2png basn3p08.ppm basn3p08.png
-# -- gray with alpha-channel
-./pnm2png -alpha basn6a08.pgm basn4a08.pgm basn4a08.png
-./pnm2png -alpha basn6a16.pgm basn4a16.pgm basn4a16.png
-# -- color with alpha-channel
-./pnm2png -alpha basn6a08.pgm basn6a08.ppm basn6a08.png
-./pnm2png -alpha basn6a16.pgm basn6a16.ppm basn6a16.png
-# -- grayscale
-./pnm2png rawn0g01.pgm rawn0g01.png
-./pnm2png rawn0g02.pgm rawn0g02.png
-./pnm2png rawn0g04.pgm rawn0g04.png
-./pnm2png rawn0g08.pgm rawn0g08.png
-./pnm2png rawn0g16.pgm rawn0g16.png
-# -- full-color
-./pnm2png rawn2c08.ppm rawn2c08.png
-./pnm2png rawn2c16.ppm rawn2c16.png
-# -- palletted
-./pnm2png rawn3p01.ppm rawn3p01.png
-./pnm2png rawn3p02.ppm rawn3p02.png
-./pnm2png rawn3p04.ppm rawn3p04.png
-./pnm2png rawn3p08.ppm rawn3p08.png
-# -- gray with alpha-channel
-./pnm2png -alpha rawn6a08.pgm rawn4a08.pgm rawn4a08.png
-./pnm2png -alpha rawn6a16.pgm rawn4a16.pgm rawn4a16.png
-# -- color with alpha-channel
-./pnm2png -alpha rawn6a08.pgm rawn6a08.ppm rawn6a08.png
-./pnm2png -alpha rawn6a16.pgm rawn6a16.ppm rawn6a16.png
-