Imported from libpng-1.2.19beta16.tar

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.2.19beta15 - June 17, 2007
+Libpng 1.2.19beta16 - June 19, 2007
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -9,32 +9,32 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.2.19beta15.tar.gz
+   libpng-1.2.19beta16.tar.gz
-   libpng-1.2.19beta15.tar.bz2
+   libpng-1.2.19beta16.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.2.19beta15-no-config.tar.gz
+   libpng-1.2.19beta16-no-config.tar.gz
-   libpng-1.2.19beta15-no-config.tar.bz2
+   libpng-1.2.19beta16-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1219b15.zip
+   lp1219b16.zip
-   lp1219b15.tar.bz2
+   lp1219b16.tar.bz2
 
 Project files
 
-   libpng-1.2.19beta15-project-netware.zip
+   libpng-1.2.19beta16-project-netware.zip
-   libpng-1.2.19beta15-project-wince.zip
+   libpng-1.2.19beta16-project-wince.zip
 
 Other information:
 
-   libpng-1.2.19beta15-README.txt
+   libpng-1.2.19beta16-README.txt
-   libpng-1.2.19beta15-KNOWNBUGS.txt
+   libpng-1.2.19beta16-KNOWNBUGS.txt
-   libpng-1.2.19beta15-LICENSE.txt
+   libpng-1.2.19beta16-LICENSE.txt
-   libpng-1.2.19beta15-Y2K-compliance.txt
+   libpng-1.2.19beta16-Y2K-compliance.txt
 
 Changes since the last public release (1.2.18):
 
@@ -97,6 +97,12 @@ version 1.2.19beta14 [June 16, 2007]
 version 1.2.19beta15 [June 17, 2007]
   Revised pnggccrd.c.
 
+version 1.2.19beta16 [June 19, 2007]
+  Revised pnggccrd.c again.
+  Updated contrib/gregbook.
+  Changed '#include "$srcdir/pnggccrd.c"' 'include "$srcdir/pnggccrd.c"'
+    in configure.ac
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 
 (subscription required; visit 

CHANGES

@@ -1790,6 +1790,12 @@ version 1.2.19beta14 [June 16, 2007]
 version 1.2.19beta15 [June 17, 2007]
   Revised pnggccrd.c.
 
+version 1.2.19beta16 [June 19, 2007]
+  Revised pnggccrd.c again.
+  Updated contrib/gregbook.
+  Changed '#include "$srcdir/pnggccrd.c"' 'include "$srcdir/pnggccrd.c"'
+    in configure.ac
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement

INSTALL

@@ -1,5 +1,5 @@
 
-Installing libpng version 1.2.19beta15 - June 17, 2007
+Installing libpng version 1.2.19beta16 - June 19, 2007
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -44,7 +44,7 @@ to have access to the zlib.h and zconf.h include files that
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.2.19beta15" or "lpng109" and "zlib-1.2.1"
+might be called "libpng-1.2.19beta16" or "lpng109" and "zlib-1.2.1"
 or "zlib121") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
@@ -101,14 +101,14 @@ include
  CMakeLists.txt    =>  "cmake" script
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       gcc, creates libpng12.so.0.1.2.19beta15)
+                       gcc, creates libpng12.so.0.1.2.19beta16)
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng12.so.0.1.2.19beta15)
+                       (gcc, creates libpng12.so.0.1.2.19beta16)
  makefile.gcmmx    =>  Linux/ELF makefile
-                       (gcc, creates libpng12.so.0.1.2.19beta15,
+                       (gcc, creates libpng12.so.0.1.2.19beta16,
                        uses assembler code tuned for Intel MMX platform)
  makefile.nommx    =>  Linux/ELF makefile
-                       (gcc, creates libpng12.so.0.1.2.19beta15
+                       (gcc, creates libpng12.so.0.1.2.19beta16
                        does not use Intel MMX assembler code)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
@@ -131,14 +131,14 @@ include
  makefile.openbsd  =>  OpenBSD makefile
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng12.so.0.1.2.19beta15)
+                       creates libpng12.so.0.1.2.19beta16)
  makefile.sunos    =>  Sun makefile
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng12.so.0.1.2.19beta15)
+                       creates libpng12.so.0.1.2.19beta16)
  makefile.solaris-x86 =>  Solaris/intelMMX 2.X makefile (gcc,
-                       creates libpng12.so.0.1.2.19beta15)
+                       creates libpng12.so.0.1.2.19beta16)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng12.so.0.1.2.19beta15)
+                       creates libpng12.so.0.1.2.19beta16)
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
  makefile.64sunu   =>  Sun Ultra 64-bit makefile
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc

KNOWNBUG

@@ -1,5 +1,5 @@
 
-Known bugs in libpng version 1.2.19beta15
+Known bugs in libpng version 1.2.19beta16
 
 1. April 22, 2001: pnggccrd.c has been reported to crash on NetBSD when
    reading interlaced PNG files, when assembler code is enabled but running

LICENSE

@@ -8,7 +8,7 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.2.19beta15, June 17, 2007, are
+libpng versions 1.2.6, August 15, 2004, through 1.2.19beta16, June 19, 2007, are
 Copyright (c) 2004, 2006-2007 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -106,4 +106,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-June 17, 2007
+June 19, 2007

README

@@ -1,4 +1,4 @@
-README for libpng version 1.2.19beta15 - June 17, 2007 (shared library 12.0)
+README for libpng version 1.2.19beta16 - June 19, 2007 (shared library 12.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -190,11 +190,11 @@ Files in this distribution:
        descrip.mms      =>  VMS makefile for MMS or MMK
        makefile.std     =>  Generic UNIX makefile (cc, creates static libpng.a)
        makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            gcc, creates libpng12.so.0.1.2.19beta15)
+                            gcc, creates libpng12.so.0.1.2.19beta16)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.19beta15)
+                            (gcc, creates libpng12.so.0.1.2.19beta16)
        makefile.gcmmx   =>  Linux/ELF makefile
-                            (gcc, creates libpng12.so.0.1.2.19beta15,
+                            (gcc, creates libpng12.so.0.1.2.19beta16,
                             uses assembler code tuned for Intel MMX platform)
        makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
        makefile.knr     =>  Archaic UNIX Makefile that converts files with
@@ -216,12 +216,12 @@ Files in this distribution:
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng12.so.0.1.2.19beta15)
+                            (gcc, creates libpng12.so.0.1.2.19beta16)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng12.so.0.1.2.19beta15)
+                            (gcc, creates libpng12.so.0.1.2.19beta16)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng12.so.0.1.2.19beta15)
+                            (gcc, creates libpng12.so.0.1.2.19beta16)
        makefile.32sunu  =>  Sun Ultra 32-bit makefile
        makefile.64sunu  =>  Sun Ultra 64-bit makefile
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc

Y2KINFO

@@ -1,13 +1,13 @@
    Y2K compliance in libpng:
    =========================
 
-      June 17, 2007
+      June 19, 2007
 
       Since the PNG Development group is an ad-hoc body, we can't make
       an official declaration.
 
       This is your unofficial assurance that libpng from version 0.71 and
-      upward through 1.2.19beta15 are Y2K compliant.  It is my belief that earlier
+      upward through 1.2.19beta16 are Y2K compliant.  It is my belief that earlier
       versions were also Y2K compliant.
 
       Libpng only has three year fields.  One is a 2-byte unsigned integer

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.61 for libpng 1.2.19beta15.
+# Generated by GNU Autoconf 2.61 for libpng 1.2.19beta16.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -728,8 +728,8 @@ SHELL=${CONFIG_SHELL-/bin/sh}
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.2.19beta15'
+PACKAGE_VERSION='1.2.19beta16'
-PACKAGE_STRING='libpng 1.2.19beta15'
+PACKAGE_STRING='libpng 1.2.19beta16'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 
 ac_unique_file="pngget.c"
@@ -1405,7 +1405,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures libpng 1.2.19beta15 to adapt to many kinds of systems.
+\`configure' configures libpng 1.2.19beta16 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1475,7 +1475,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.2.19beta15:";;
+     short | recursive ) echo "Configuration of libpng 1.2.19beta16:";;
    esac
   cat <<\_ACEOF
 
@@ -1585,7 +1585,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.2.19beta15
+libpng configure 1.2.19beta16
 generated by GNU Autoconf 2.61
 
 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
@@ -1599,7 +1599,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by libpng $as_me 1.2.19beta15, which was
+It was created by libpng $as_me 1.2.19beta16, which was
 generated by GNU Autoconf 2.61.  Invocation command line was
 
   $ $0 $@
@@ -2269,7 +2269,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.2.19beta15'
+ VERSION='1.2.19beta16'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2440,7 +2440,7 @@ fi
 
 
 
-PNGLIB_VERSION=1.2.19beta15
+PNGLIB_VERSION=1.2.19beta16
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=2
 PNGLIB_RELEASE=19
@@ -20558,7 +20558,7 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
-#include "pnggccrd.c"
+#include "$srcdir/pnggccrd.c"
 int
 main ()
 {
@@ -21119,7 +21119,7 @@ exec 6>&1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by libpng $as_me 1.2.19beta15, which was
+This file was extended by libpng $as_me 1.2.19beta16, which was
 generated by GNU Autoconf 2.61.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -21172,7 +21172,7 @@ Report bugs to <bug-autoconf@gnu.org>."
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF
 ac_cs_version="\\
-libpng config.status 1.2.19beta15
+libpng config.status 1.2.19beta16
 configured by $0, generated by GNU Autoconf 2.61,
   with options \\"`echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 

configure.ac

@@ -18,12 +18,12 @@ AC_PREREQ(2.59)
 
 dnl Version number stuff here:
 
-AC_INIT([libpng], [1.2.19beta15], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.2.19beta16], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-PNGLIB_VERSION=1.2.19beta15
+PNGLIB_VERSION=1.2.19beta16
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=2
 PNGLIB_RELEASE=19
@@ -62,7 +62,7 @@ LIBPNG_DEFINES=-DPNG_CONFIGURE_LIBPNG
 AC_MSG_CHECKING(
   [if assembler code in pnggccrd.c can be compiled without PNG_NO_MMX_CODE])
 AC_TRY_COMPILE(
-  [#include "pnggccrd.c"],
+  [#include "$srcdir/pnggccrd.c"],
   [return 0;],
   AC_MSG_RESULT(yes)
   LIBPNG_NO_MMX="",

contrib/gregbook/COPYING

@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year  name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.

contrib/gregbook/LICENSE

@@ -1,12 +1,19 @@
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -23,4 +30,21 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------

contrib/gregbook/Makefile.mingw32

@@ -0,0 +1,130 @@
+# Sample makefile for rpng-win / rpng2-win / wpng using mingw32-gcc and make.
+# Greg Roelofs
+# Last modified:  2 June 2007
+#
+#	The programs built by this makefile are described in the book,
+#	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
+#	Associates, 1999).  Go buy a copy, eh?  Well, OK, it's not
+#	generally for sale anymore, but it's the thought that counts,
+#	right?  (Hint:  http://www.libpng.org/pub/png/book/ )
+#
+# Invoke this makefile from a DOS-prompt window via:
+#
+#	make -f Makefile.mingw32
+#
+# This makefile assumes libpng and zlib have already been built or downloaded
+# and are in subdirectories at the same level as the current subdirectory
+# (as indicated by the PNGDIR and ZDIR macros below).  It makes no assumptions
+# at all about the mingw32 installation tree (W32DIR).  Edit as appropriate.
+#
+# Note that the names of the dynamic and static libpng and zlib libraries
+# used below may change in later releases of the libraries.  This makefile
+# builds both statically and dynamically linked executables by default.
+# (You need only one set, but for testing it can be handy to have both.)
+
+
+# macros --------------------------------------------------------------------
+
+#PNGDIR = ../..#		for libpng-x.y.z/contrib/gregbook builds
+PNGDIR = ../libpng-win32
+PNGINC = -I$(PNGDIR)
+PNGLIBd = $(PNGDIR)/libpng.dll.a	# dynamically linked
+PNGLIBs = $(PNGDIR)/libpng.a		# statically linked, local libpng
+
+#ZDIR = ../../../zlib-win32#	for libpng-x.y.z/contrib/gregbook builds
+ZDIR = ../zlib-win32
+ZINC = -I$(ZDIR)
+ZLIBd = $(ZDIR)/libzdll.a
+ZLIBs = $(ZDIR)/libz.a
+
+# change this to be the path where mingw32 installs its stuff:
+W32DIR =
+#W32DIR = /usr/local/cross-tools/i386-mingw32msvc
+W32INC = -I$(W32DIR)/include
+W32LIB = $(W32DIR)/lib/libuser32.a $(W32DIR)/lib/libgdi32.a
+
+CC = gcc
+#CC = i386-mingw32msvc-gcc #	e.g., Linux -> Win32 cross-compilation
+LD = $(CC)
+RM = rm -f
+CFLAGS = -O -Wall $(INCS) $(MINGW_CCFLAGS)
+# [note that -Wall is a gcc-specific compilation flag ("most warnings on")]
+# [-ansi, -pedantic and -W can also be used]
+LDFLAGS = $(MINGW_LDFLAGS)
+O = .o
+E = .exe
+
+INCS = $(PNGINC) $(ZINC) $(W32INC)
+RLIBSd = $(PNGLIBd) $(ZLIBd) $(W32LIB) -lm
+RLIBSs = $(PNGLIBs) $(ZLIBs) $(W32LIB) -lm
+WLIBSd = $(PNGLIBd) $(ZLIBd)
+WLIBSs = $(PNGLIBs) $(ZLIBs)
+
+RPNG   = rpng-win
+RPNG2  = rpng2-win
+WPNG   = wpng
+
+ROBJSd  = $(RPNG)$(O) readpng.pic$(O)
+ROBJS2d = $(RPNG2)$(O) readpng2.pic$(O)
+WOBJSd  = $(WPNG)$(O) writepng.pic$(O)
+
+RPNGs  = $(RPNG)-static
+RPNG2s = $(RPNG2)-static
+WPNGs  = $(WPNG)-static
+
+ROBJSs  = $(RPNG)$(O) readpng$(O)
+ROBJS2s = $(RPNG2)$(O) readpng2$(O)
+WOBJSs  = $(WPNG)$(O) writepng$(O)
+
+STATIC_EXES  = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E)
+DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
+
+EXES = $(STATIC_EXES) $(DYNAMIC_EXES)
+
+
+# implicit make rules -------------------------------------------------------
+
+.c$(O):
+	$(CC) -c $(CFLAGS) $<
+
+%.pic$(O): %.c
+	$(CC) -c $(CFLAGS) -DPNG_BUILD_DLL -o $@ $<
+
+
+# dependencies --------------------------------------------------------------
+
+all:  $(EXES)
+
+$(RPNGs)$(E): $(ROBJSs)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJSs) $(RLIBSs)
+
+$(RPNG)$(E): $(ROBJSd)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJSd) $(RLIBSd)
+
+$(RPNG2s)$(E): $(ROBJS2s)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2s) $(RLIBSs)
+
+$(RPNG2)$(E): $(ROBJS2d)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2d) $(RLIBSd)
+
+$(WPNGs)$(E): $(WOBJSs)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJSs) $(WLIBSs)
+
+$(WPNG)$(E): $(WOBJSd)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJSd) $(WLIBSd)
+
+$(RPNG)$(O):	$(RPNG).c readpng.h
+$(RPNG2)$(O):	$(RPNG2).c readpng2.h
+$(WPNG)$(O):	$(WPNG).c writepng.h
+
+readpng$(O) readpng.pic$(O):	readpng.c readpng.h
+readpng2$(O) readpng2.pic$(O):	readpng2.c readpng2.h
+writepng$(O) writepng.pic$(O):	writepng.c writepng.h
+
+
+# maintenance ---------------------------------------------------------------
+
+clean:
+	$(RM) $(EXES)
+	$(RM) $(ROBJSs) $(ROBJS2s) $(WOBJSs)
+	$(RM) $(ROBJSd) $(ROBJS2d) $(WOBJSd)

contrib/gregbook/Makefile.unx

@@ -1,58 +1,70 @@
 # Sample makefile for rpng-x / rpng2-x / wpng using gcc and make.
 # Greg Roelofs
-# Last modified:  7 March 2002
+# Last modified:  2 June 2007
 #
 #	The programs built by this makefile are described in the book,
 #	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
-#	Associates, 1999).  Go buy a copy, eh?  Buy some for friends
+#	Associates, 1999).  Go buy a copy, eh?  Well, OK, it's not
-#	and family, too.  (Not that this is a blatant plug or anything.)
+#	generally for sale anymore, but it's the thought that counts,
+#	right?  (Hint:  http://www.libpng.org/pub/png/book/ )
 #
 # Invoke this makefile from a shell prompt in the usual way; for example:
 #
 #	make -f Makefile.unx
 #
 # This makefile assumes libpng and zlib have already been built or downloaded
-# and are both installed in /usr/local/{include,lib} (as indicated by the
+# and are installed in /usr/local/{include,lib} or as otherwise indicated by
-# PNG* and Z* macros below).  Edit as appropriate--choose only ONE each of
+# the PNG* and Z* macros below.  Edit as appropriate--choose only ONE each of
-# the PNGINC, PNGLIB, ZINC and ZLIB lines.
+# the PNGINC, PNGLIBd, PNGLIBs, ZINC, ZLIBd and ZLIBs lines.
 #
-# This makefile builds statically linked executables (against libpng and zlib,
+# This makefile builds both dynamically and statically linked executables
-# that is), but that can be changed by uncommenting the appropriate PNGLIB and
+# (against libpng and zlib, that is), but that can be changed by modifying
-# ZLIB lines.
+# the "EXES =" line.  (You need only one set, but for testing it can be handy
+# to have both.)
 
 
 # macros --------------------------------------------------------------------
 
-PNGINC = -I/usr/local/include/libpng12
+#PNGDIR = /usr/local/lib
-#PNGLIB = -L/usr/local/lib -lpng12 # dynamically linked against libpng
+#PNGINC = -I/usr/local/include/libpng12
-PNGLIB = /usr/local/lib/libpng12.a # statically linked against libpng
+#PNGLIBd = -L$(PNGDIR) -lpng12 # dynamically linked, installed libpng
+#PNGLIBs = $(PNGDIR)/libpng12.a # statically linked, installed libpng
 # or:
-#PNGINC = -I../libpng
+PNGDIR = ../..#	this one is for libpng-x.y.z/contrib/gregbook builds
-#PNGLIB = -L../libpng -lpng
+#PNGDIR = ../libpng
-#PNGLIB = ../libpng/libpng.a
+PNGINC = -I$(PNGDIR)
+PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng12	# dynamically linked
+PNGLIBs = $(PNGDIR)/libpng.a		# statically linked, local libpng
 
+ZDIR = /usr/local/lib
+#ZDIR = /usr/lib64
 ZINC = -I/usr/local/include
-#ZLIB = -L/usr/local/lib -lz		# dynamically linked against zlib
+ZLIBd = -L$(ZDIR) -lz			# dynamically linked against zlib
-ZLIB = /usr/local/lib/libz.a		# statically linked against zlib
+ZLIBs = $(ZDIR)/libz.a			# statically linked against zlib
-#ZINC = -I../zlib
+# or:
-#ZLIB = -L../zlib -lz
+#ZDIR = ../zlib
-#ZLIB = ../zlib/libz.a
+#ZINC = -I$(ZDIR)
+#ZLIBd = -Wl,-rpath,$(ZDIR) -L$(ZDIR) -lz  # -rpath allows in-place testing
+#ZLIBs = $(ZDIR)/libz.a
 
 #XINC = -I/usr/include			# old-style, stock X distributions
-#XLIB = -L/usr/lib/X11 -lX11
+#XLIB = -L/usr/lib/X11 -lX11		#  (including SGI IRIX)
 #XINC = -I/usr/openwin/include		# Sun workstations (OpenWindows)
 #XLIB = -L/usr/openwin/lib -lX11
-XINC = -I/usr/X11R6/include		# new X distributions (XFree86, etc.)
+XINC = -I/usr/X11R6/include		# new X distributions (X.org, etc.)
 XLIB = -L/usr/X11R6/lib -lX11
+#XLIB = -L/usr/X11R6/lib64 -lX11	# e.g., Red Hat on AMD64
 
 INCS = $(PNGINC) $(ZINC) $(XINC)
-RLIBS = $(PNGLIB) $(ZLIB) $(XLIB) -lm
+RLIBSd = $(PNGLIBd) $(ZLIBd) $(XLIB) -lm
-WLIBS = $(PNGLIB) $(ZLIB)
+RLIBSs = $(PNGLIBs) $(ZLIBs) $(XLIB) -lm
+WLIBSd = $(PNGLIBd) $(ZLIBd) -lm
+WLIBSs = $(PNGLIBs) $(ZLIBs)
 
 CC = gcc
 LD = gcc
 RM = rm -f
-CFLAGS = -O -Wall $(INCS)
+CFLAGS = -O -Wall $(INCS) -DFEATURE_LOOP
 # [note that -Wall is a gcc-specific compilation flag ("most warnings on")]
 # [-ansi, -pedantic and -W can also be used]
 LDFLAGS =
@@ -63,11 +75,18 @@ RPNG  = rpng-x
 RPNG2  = rpng2-x
 WPNG   = wpng
 
+RPNGs  = $(RPNG)-static
+RPNG2s = $(RPNG2)-static
+WPNGs  = $(WPNG)-static
+
 ROBJS  = $(RPNG)$(O) readpng$(O)
 ROBJS2 = $(RPNG2)$(O) readpng2$(O)
 WOBJS  = $(WPNG)$(O) writepng$(O)
 
-EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
+STATIC_EXES  = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E)
+DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
+
+EXES = $(STATIC_EXES) $(DYNAMIC_EXES)
 
 
 # implicit make rules -------------------------------------------------------
@@ -80,14 +99,23 @@ EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
 
 all:  $(EXES)
 
+$(RPNGs)$(E): $(ROBJS)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSs)
+
 $(RPNG)$(E): $(ROBJS)
-	$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBS)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSd)
+
+$(RPNG2s)$(E): $(ROBJS2)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSs)
 
 $(RPNG2)$(E): $(ROBJS2)
-	$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBS)
+	$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSd)
+
+$(WPNGs)$(E): $(WOBJS)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSs)
 
 $(WPNG)$(E): $(WOBJS)
-	$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBS)
+	$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSd)
 
 $(RPNG)$(O):	$(RPNG).c readpng.h
 $(RPNG2)$(O):	$(RPNG2).c readpng2.h

contrib/gregbook/Makefile.w32

@@ -1,11 +1,12 @@
 # Sample makefile for rpng-win / rpng2-win / wpng using MSVC and NMAKE.
 # Greg Roelofs
-# Last modified:  16 February 1999
+# Last modified:  2 June 2007
 #
 #	The programs built by this makefile are described in the book,
 #	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
-#	Associates, 1999).  Go buy a copy, eh?  Buy some for friends
+#	Associates, 1999).  Go buy a copy, eh?  Well, OK, it's not
-#	and family, too.  (Not that this is a blatant plug or anything.)
+#	generally for sale anymore, but it's the thought that counts,
+#	right?  (Hint:  http://www.libpng.org/pub/png/book/ )
 #
 # Invoke this makefile from a DOS prompt window via:
 #
@@ -53,7 +54,7 @@ CC = cl
 LD = link
 RM = del
 CFLAGS = -nologo -O -W3 $(INCS) $(cvars)
-# [note that -Wall is an MSVC-specific compilation flag ("all warnings on")]
+# [note that -W3 is an MSVC-specific compilation flag ("all warnings on")]
 # [see %devstudio%\vc\include\win32.mak for cvars macro definition]
 O = .obj
 E = .exe

contrib/gregbook/README

@@ -22,7 +22,8 @@ below.
 Files:
 
    README             this file
-   LICENSE            terms of distribution and reuse (BSD-like)
+   LICENSE            terms of distribution and reuse (BSD-like or GNU GPL)
+   COPYING            GNU General Public License (GPL)
 
    Makefile.unx       Unix makefile
    Makefile.w32       Windows (MSVC) makefile
@@ -54,15 +55,15 @@ mation and links to the latest version of the source code, and Chapters
 13-15 of the book for detailed discussion of the three programs.
 
 Greg Roelofs
-newt@pobox.com
+http://pobox.com/~newt/greg_contact.html
-30 June 2001
+2 June 2007
 
 
 BUILD INSTRUCTIONS
 
  - Prerequisites (in order of compilation):
 
-      - zlib		http://www.gzip.org/zlib/
+      - zlib		http://zlib.net/
       - libpng		http://www.libpng.org/pub/png/libpng.html
       - pngbook		http://www.libpng.org/pub/png/book/sources.html
 
@@ -176,7 +177,7 @@ RUNNING THE PROGRAMS:  (VERY) BRIEF INTRO
      wpng is a purely command-line image converter from binary PBMPLUS/NetPBM
      format (.pgm or .ppm) to PNG; for example,
 
-	wpng -time < toucan.ppm > toucan.png
+	wpng -time < toucan-notrans.ppm > toucan-notrans.png
 
      would convert the specified PPM file (using redirection) to PNG, auto-
      matically setting the PNG modification-time chunk.

contrib/gregbook/readpng.c

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #include <stdio.h>

contrib/gregbook/readpng.h

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #ifndef TRUE

contrib/gregbook/readpng2.c

@@ -4,19 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-   Changelog:
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
-    - 1.01:  initial public release
-    - 1.02:  added code to skip unused chunks (GR-P)
-
-  ---------------------------------------------------------------------------
-
-      Copyright (c) 1998-2002 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -33,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 
@@ -56,7 +74,7 @@ static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg);
 void readpng2_version_info(void)
 {
 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && \
-    (defined(__i386__) || defined(_M_IX86)) && \
+    (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \
     defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
     /*
      * WARNING:  This preprocessor approach means that the following code
@@ -79,7 +97,12 @@ void readpng2_version_info(void)
               "with MMX support\n   (%s version).", PNG_LIBPNG_VER_STRING,
               png_libpng_ver, compilerID == 1? "MSVC++" :
               (compilerID == 2? "GNU C" : "unknown"));
-            fprintf(stderr, "  Processor %s MMX instructions.\n",
+            fprintf(stderr, "  Processor (x86%s) %s MMX instructions.\n",
+#if defined(__x86_64__)
+              "_64"
+#else
+              "",
+#endif
               mmxsupport? "supports" : "does not support");
             if (mmxsupport > 0) {
                 int num_optims = 0;
@@ -179,40 +202,38 @@ int readpng2_init(mainprog_info *mainprog_ptr)
         return 2;
     }
 
-    /* prepare the reader to ignore all recognized chunks whose data isn't
-     * going to be used, i.e., all chunks recognized by libpng except for
-     * IHDR, PLTE, IDAT, IEND, tRNS, bKGD, gAMA, and sRGB : */
 
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+    /* prepare the reader to ignore all recognized chunks whose data won't be
+     * used, i.e., all chunks recognized by libpng except for IHDR, PLTE, IDAT,
+     * IEND, tRNS, bKGD, gAMA, and sRGB (small performance improvement) */
     {
-#ifndef HANDLE_CHUNK_NEVER
+        /* These byte strings were copied from png.h.  If a future libpng
-/* prior to libpng-1.2.5, this macro was internal, so we define it here. */
+         * version recognizes more chunks, add them to this list.  If a
-# define HANDLE_CHUNK_NEVER 1
+         * future version of readpng2.c recognizes more chunks, delete them
-#endif
+         * from this list. */
-       /* these byte strings were copied from png.h.
+        static const png_byte chunks_to_ignore[] = {
-        * If a future libpng version recognizes more chunks, add them
+             99,  72,  82,  77, '\0',  /* cHRM */
-        * to this list.  If a future version of readpng2.c recognizes
-        * more chunks, delete them from this list. */
-       png_byte png_chunk_types_to_ignore[]=
-          { 99,  72,  82,  77, '\0', /* cHRM */
             104,  73,  83,  84, '\0',  /* hIST */
             105,  67,  67,  80, '\0',  /* iCCP */
             105,  84,  88, 116, '\0',  /* iTXt */
             111,  70,  70, 115, '\0',  /* oFFs */
             112,  67,  65,  76, '\0',  /* pCAL */
-           115,  67,  65,  76, '\0', /* sCAL */
             112,  72,  89, 115, '\0',  /* pHYs */
             115,  66,  73,  84, '\0',  /* sBIT */
+            115,  67,  65,  76, '\0',  /* sCAL */
             115,  80,  76,  84, '\0',  /* sPLT */
+            115,  84,  69,  82, '\0',  /* sTER */
             116,  69,  88, 116, '\0',  /* tEXt */
             116,  73,  77,  69, '\0',  /* tIME */
-           122,  84,  88, 116, '\0'}; /* zTXt */
+            122,  84,  88, 116, '\0'   /* zTXt */
-#define NUM_PNG_CHUNK_TYPES_TO_IGNORE 13
+        };
 
-    png_set_keep_unknown_chunks(png_ptr, HANDLE_CHUNK_NEVER,
+        png_set_keep_unknown_chunks(png_ptr, 1 /* PNG_HANDLE_CHUNK_NEVER */,
-        png_chunk_types_to_ignore, NUM_PNG_CHUNK_TYPES_TO_IGNORE);
+          chunks_to_ignore, sizeof(chunks_to_ignore)/5);
     }
-#endif
+#endif /* PNG_UNKNOWN_CHUNKS_SUPPORTED */
+
 
     /* instead of doing png_init_io() here, now we set up our callback
      * functions for progressive decoding */
@@ -237,7 +258,7 @@ int readpng2_init(mainprog_info *mainprog_ptr)
      *                  png_set_asm_flags (png_ptr, flags);
      */
 
-#if (defined(__i386__) || defined(_M_IX86)) && \
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \
     defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
     /*
      * WARNING:  This preprocessor approach means that the following code

contrib/gregbook/readpng2.h

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #ifndef TRUE
@@ -66,7 +90,7 @@ typedef struct _mainprog_info {
     int rowbytes;
     int channels;
     int need_bgcolor;
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
     int nommxfilters;
     int nommxcombine;
     int nommxinterlace;

contrib/gregbook/readppm.c

@@ -0,0 +1,179 @@
+/*---------------------------------------------------------------------------
+
+   rpng - simple PNG display program                              readppm.c
+
+  ---------------------------------------------------------------------------
+
+   This is a special-purpose replacement for readpng.c that allows binary
+   PPM files to be used in place of PNG images.
+
+  ---------------------------------------------------------------------------
+
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
+
+      This software is provided "as is," without warranty of any kind,
+      express or implied.  In no event shall the author or contributors
+      be held liable for any damages arising in any way from the use of
+      this software.
+
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
+      Permission is granted to anyone to use this software for any purpose,
+      including commercial applications, and to alter it and redistribute
+      it freely, subject to the following restrictions:
+
+      1. Redistributions of source code must retain the above copyright
+         notice, disclaimer, and this list of conditions.
+      2. Redistributions in binary form must reproduce the above copyright
+         notice, disclaimer, and this list of conditions in the documenta-
+         tion and/or other materials provided with the distribution.
+      3. All advertising materials mentioning features or use of this
+         software must display the following acknowledgment:
+
+            This product includes software developed by Greg Roelofs
+            and contributors for the book, "PNG: The Definitive Guide,"
+            published by O'Reilly and Associates.
+
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+  ---------------------------------------------------------------------------*/
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "readpng.h"    /* typedefs, common macros, public prototypes */
+
+
+ulg  width, height;
+int  bit_depth, color_type, channels;
+uch  *image_data = NULL;
+FILE *saved_infile;
+
+
+void readpng_version_info()
+{
+    fprintf(stderr, "   Compiled without libpng, zlib or PBMPLUS/NetPBM.\n");
+}
+
+
+/* return value = 0 for success, 1 for bad sig, 2 for bad IHDR, 4 for no mem */
+
+int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight)
+{
+    static uch ppmline[256];
+    int maxval;
+
+
+    saved_infile = infile;
+
+    fgets(ppmline, 256, infile);
+    if (ppmline[0] != 'P' || ppmline[1] != '6') {
+        fprintf(stderr, "ERROR:  not a PPM file\n");
+        return 1;
+    }
+    /* possible color types:  P5 = grayscale (0), P6 = RGB (2), P8 = RGBA (6) */
+    if (ppmline[1] == '6') {
+        color_type = 2;
+        channels = 3;
+    } else if (ppmline[1] == '8') {
+        color_type = 6;
+        channels = 4;
+    } else /* if (ppmline[1] == '5') */ {
+        color_type = 0;
+        channels = 1;
+    }
+
+    do {
+        fgets(ppmline, 256, infile);
+    } while (ppmline[0] == '#');
+    sscanf(ppmline, "%lu %lu", &width, &height);
+
+    do {
+        fgets(ppmline, 256, infile);
+    } while (ppmline[0] == '#');
+    sscanf(ppmline, "%d", &maxval);
+    if (maxval != 255) {
+        fprintf(stderr, "ERROR:  maxval = %d\n", maxval);
+        return 2;
+    }
+    bit_depth = 8;
+
+    *pWidth = width;
+    *pHeight = height;
+
+    return 0;
+}
+
+
+
+
+/* returns 0 if succeeds, 1 if fails due to no bKGD chunk, 2 if libpng error;
+ * scales values to 8-bit if necessary */
+
+int readpng_get_bgcolor(uch *red, uch *green, uch *blue)
+{
+    return 1;
+}
+
+
+
+
+/* display_exponent == LUT_exponent * CRT_exponent */
+
+uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes)
+{
+    ulg  rowbytes;
+
+
+    /* expand palette images to RGB, low-bit-depth grayscale images to 8 bits,
+     * transparency chunks to full alpha channel; strip 16-bit-per-sample
+     * images to 8 bits per sample; and convert grayscale to RGB[A] */
+
+    /* GRR WARNING:  grayscale needs to be expanded and channels reset! */
+
+    *pRowbytes = rowbytes = channels*width;
+    *pChannels = channels;
+
+    if ((image_data = (uch *)malloc(rowbytes*height)) == NULL) {
+        return NULL;
+    }
+
+    Trace((stderr, "readpng_get_image:  rowbytes = %ld, height = %ld\n", rowbytes, height));
+
+
+    /* now we can go ahead and just read the whole image */
+
+    fread(image_data, 1L, rowbytes*height, saved_infile);
+
+
+    return image_data;
+}
+
+
+void readpng_cleanup(int free_image_data)
+{
+    if (free_image_data && image_data) {
+        free(image_data);
+        image_data = NULL;
+    }
+}

contrib/gregbook/rpng-win.c

@@ -22,16 +22,24 @@
     - 1.02:  added extra set of parentheses to png_jmpbuf() macro; fixed
               command-line parsing bug
     - 1.10:  enabled "message window"/console (thanks to David Geldreich)
+    - 2.00:  dual-licensed (added GNU GPL)
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -48,11 +56,28 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "rpng-win"
 #define LONGNAME  "Simple PNG Viewer for Windows"
-#define VERSION   "1.20 of 28 May 2001"
+#define VERSION   "2.00 of 2 June 2007"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -85,10 +110,9 @@ static void       rpng_win_cleanup(void);
 LRESULT CALLBACK  rpng_win_wndproc(HWND, UINT, WPARAM, LPARAM);
 
 
-static char titlebar[1024], *window_name = titlebar;
+static char titlebar[1024];
 static char *progname = PROGNAME;
 static char *appname = LONGNAME;
-static char *icon_name = PROGNAME;     /* GRR:  not (yet) used */
 static char *filename;
 static FILE *infile;
 
@@ -325,9 +349,14 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
      * check for one in the PNG file--if not, the initialized values of 0
      * (black) will be used */
 
-    if (have_bg)
+    if (have_bg) {
-        sscanf(bgstr+1, "%2x%2x%2x", &bg_red, &bg_green, &bg_blue);
+        unsigned r, g, b;   /* this approach quiets compiler warnings */
-    else if (readpng_get_bgcolor(&bg_red, &bg_green, &bg_blue) > 1) {
+
+        sscanf(bgstr+1, "%2x%2x%2x", &r, &g, &b);
+        bg_red   = (uch)r;
+        bg_green = (uch)g;
+        bg_blue  = (uch)b;
+    } else if (readpng_get_bgcolor(&bg_red, &bg_green, &bg_blue) > 1) {
         readpng_cleanup(TRUE);
         fprintf(stderr, PROGNAME
           ":  libpng error while checking for background color\n");

contrib/gregbook/rpng-x.c

@@ -9,7 +9,7 @@
    by Martin Zinser under OpenVMS; may work under OS/2 with some tweaking).
 
    to do:
-    - 8-bit support
+    - 8-bit (colormapped) X support
     - use %.1023s to simplify truncation of title-bar string?
 
   ---------------------------------------------------------------------------
@@ -21,18 +21,27 @@
     - 1.10:  added support for non-default visuals; fixed X pixel-conversion
     - 1.11:  added extra set of parentheses to png_jmpbuf() macro; fixed
               command-line parsing bug
-    - 1.12:  fixed small X memory leak (thanks to Francois Petitjean)
+    - 1.12:  fixed some small X memory leaks (thanks to François Petitjean)
-    - 1.13:  fixed XFreeGC() crash bug
+    - 1.13:  fixed XFreeGC() crash bug (thanks to Patrick Welche)
+    - 1.14:  added support for X resources (thanks to Gerhard Niklasch)
+    - 2.00:  dual-licensed (added GNU GPL)
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -49,11 +58,30 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "rpng-x"
 #define LONGNAME  "Simple PNG Viewer for X"
-#define VERSION   "1.13 of 16 August 2001"
+#define VERSION   "2.00 of 2 June 2007"
+#define RESNAME   "rpng"	/* our X resource application name */
+#define RESCLASS  "Rpng"	/* our X resource class name */
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -91,6 +119,8 @@ static int  rpng_x_msb(ulg u32val);
 static char titlebar[1024], *window_name = titlebar;
 static char *appname = LONGNAME;
 static char *icon_name = PROGNAME;
+static char *res_name = RESNAME;
+static char *res_class = RESCLASS;
 static char *filename;
 static FILE *infile;
 
@@ -399,11 +429,12 @@ static int rpng_x_create_window(void)
     XEvent e;
     XGCValues gcvalues;
     XSetWindowAttributes attr;
-    XSizeHints *size_hints;
     XTextProperty windowName, *pWindowName = &windowName;
     XTextProperty iconName, *pIconName = &iconName;
     XVisualInfo visual_info;
+    XSizeHints *size_hints;
     XWMHints *wm_hints;
+    XClassHint *class_hints;
 
 
     screen = DefaultScreen(display);
@@ -526,7 +557,7 @@ static int rpng_x_create_window(void)
     if (!XStringListToTextProperty(&icon_name, 1, pIconName))
         pIconName = NULL;
 
-    /* OK if either hints allocation fails; XSetWMProperties() allows NULLs */
+    /* OK if any hints allocation fails; XSetWMProperties() allows NULLs */
 
     if ((size_hints = XAllocSizeHints()) != NULL) {
         /* window will not be resizable */
@@ -542,8 +573,13 @@ static int rpng_x_create_window(void)
         wm_hints->flags = StateHint | InputHint  /* | IconPixmapHint */ ;
     }
 
+    if ((class_hints = XAllocClassHint()) != NULL) {
+        class_hints->res_name = res_name;
+        class_hints->res_class = res_class;
+    }
+
     XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0,
-      size_hints, wm_hints, NULL);
+      size_hints, wm_hints, class_hints);
 
     /* various properties and hints no longer needed; free memory */
     if (pWindowName)
@@ -554,6 +590,8 @@ static int rpng_x_create_window(void)
         XFree(size_hints);
     if (wm_hints)
        XFree(wm_hints);
+    if (class_hints)
+       XFree(class_hints);
 
     XMapWindow(display, window);
 

contrib/gregbook/rpng2-win.c

@@ -27,16 +27,25 @@
     - 1.10:  enabled "message window"/console (thanks to David Geldreich)
     - 1.20:  added runtime MMX-enabling/disabling and new -mmx* options
     - 1.21:  made minor tweak to usage screen to fit within 25-line console
+    - 1.22:  added AMD64/EM64T support (__x86_64__)
+    - 2.00:  dual-licensed (added GNU GPL)
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -53,11 +62,28 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "rpng2-win"
 #define LONGNAME  "Progressive PNG Viewer for Windows"
-#define VERSION   "1.21 of 29 June 2001"
+#define VERSION   "2.00 of 2 June 2007"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -119,10 +145,9 @@ static void       rpng2_win_cleanup(void);
 LRESULT CALLBACK  rpng2_win_wndproc(HWND, UINT, WPARAM, LPARAM);
 
 
-static char titlebar[1024], *window_name = titlebar;
+static char titlebar[1024];
 static char *progname = PROGNAME;
 static char *appname = LONGNAME;
-static char *icon_name = PROGNAME;    /* GRR:  not (yet) used */
 static char *filename;
 static FILE *infile;
 
@@ -367,7 +392,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
             }
         } else if (!strncmp(*argv, "-timing", 2)) {
             timing = TRUE;
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
         } else if (!strncmp(*argv, "-nommxfilters", 7)) {
             rpng2_info.nommxfilters = TRUE;
         } else if (!strncmp(*argv, "-nommxcombine", 7)) {
@@ -432,7 +457,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
         readpng2_version_info();
         fprintf(stderr, "\n"
           "Usage:  %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n"
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
           "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
 #endif
           "        %*s file.png\n\n"
@@ -447,17 +472,17 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
           "\t\t  transparent images; overrides -bgcolor option\n"
           "    -timing\tenables delay for every block read, to simulate modem\n"
           "\t\t  download of image (~36 Kbps)\n"
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
           "    -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
           "\t\t  combining rows, and expanding interlacing, respectively\n"
 #endif
           "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
           "Press Q or Esc to quit this usage screen. ",
           PROGNAME,
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
-          strlen(PROGNAME), " ",
+          (int)strlen(PROGNAME), " ",
 #endif
-          strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
+          (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
         fflush(stderr);
         do
             ch = _getch();

contrib/gregbook/rpng2-x.c

@@ -13,7 +13,8 @@
    and "radial waves" patterns, respectively.
 
    to do:
-    - 8-bit support
+    - fix expose/redraw code:  don't draw entire row if only part exposed
+    - 8-bit (colormapped) X support
     - finish resizable checkerboard-gradient (sizes 4-128?)
     - use %.1023s to simplify truncation of title-bar string?
 
@@ -26,18 +27,32 @@
     - 1.11:  added -usleep option for demos; fixed command-line parsing bug
     - 1.12:  added -pause option for demos and testing
     - 1.20:  added runtime MMX-enabling/disabling and new -mmx* options
-    - 1.21:  fixed small X memory leak (thanks to Francois Petitjean)
+    - 1.21:  fixed some small X memory leaks (thanks to François Petitjean)
-    - 1.22:  fixed XFreeGC() crash bug
+    - 1.22:  fixed XFreeGC() crash bug (thanks to Patrick Welche)
+    - 1.23:  added -bgpat 0 mode (std white/gray checkerboard, 8x8 squares)
+    - 1.30:  added -loop option for -bgpat (ifdef FEATURE_LOOP); fixed bpp =
+              24; added support for X resources (thanks to Gerhard Niklasch)
+    - 1.31:  added code to skip unused chunks (thanks to Glenn Randers-Pehrson)
+    - 1.32:  added AMD64/EM64T support (__x86_64__); added basic expose/redraw
+              handling
+    - 2.00:  dual-licensed (added GNU GPL)
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2001 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -54,14 +69,34 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "rpng2-x"
 #define LONGNAME  "Progressive PNG Viewer for X"
-#define VERSION   "1.22 of 16 August 2001"
+#define VERSION   "2.00 of 2 June 2007"
+#define RESNAME   "rpng2"	/* our X resource application name */
+#define RESCLASS  "Rpng"	/* our X resource class name */
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <ctype.h>
 #include <string.h>
 #include <setjmp.h>       /* for jmpbuf declaration in readpng2.h */
 #include <time.h>
@@ -88,6 +123,12 @@
 #define CLIP8P(c)        MAX(0,(MIN((c),255)))   /* 8-bit pos. integer (uch) */
 #define ROUNDF(f)        ((int)(f + 0.5))
 
+#define QUIT(e,k) ((e.type == ButtonPress && e.xbutton.button == Button1) ||  \
+                  (e.type == KeyPress &&   /*  v--- or 1 for shifted keys */  \
+                  ((k = XLookupKeysym(&e.xkey, 0)) == XK_q || k == XK_Escape)))
+
+#define NO_24BIT_MASKS	/* undef case not fully written--only for redisplay() */
+
 #define rgb1_max   bg_freq
 #define rgb1_min   bg_gray
 #define rgb2_max   bg_bsat
@@ -122,6 +163,12 @@ static int  rpng2_x_create_window(void);
 static int  rpng2_x_load_bg_image (void);
 static void rpng2_x_display_row (ulg row);
 static void rpng2_x_finish_display (void);
+static void rpng2_x_redisplay_image (ulg startcol, ulg startrow,
+                                     ulg width, ulg height);
+#ifdef FEATURE_LOOP
+static void rpng2_x_reload_bg_image (void);
+static int  is_number (char *p);
+#endif
 static void rpng2_x_cleanup (void);
 static int  rpng2_x_msb (ulg u32val);
 
@@ -129,6 +176,8 @@ static int  rpng2_x_msb(ulg u32val);
 static char titlebar[1024], *window_name = titlebar;
 static char *appname = LONGNAME;
 static char *icon_name = PROGNAME;
+static char *res_name = RESNAME;
+static char *res_class = RESCLASS;
 static char *filename;
 static FILE *infile;
 
@@ -139,7 +188,7 @@ static int incount;
 
 static int pat = 6;        /* must be less than num_bgpat */
 static int bg_image = 0;
-static int bgscale = 16;
+static int bgscale, bgscale_default = 16;
 static ulg bg_rowbytes;
 static uch *bg_data;
 
@@ -165,7 +214,8 @@ static struct rgb_color {
     {255, 127,   0},    /* 12:  orange */
     {192,  96,   0},    /* 13:  darker orange */
     { 24,  60,   0},    /* 14:  dark green-yellow */
-    { 85, 125, 200}     /* 15:  ice blue */
+    { 85, 125, 200},    /* 15:  ice blue */
+    {192, 192, 192}     /* 16:  Netscape/Mosaic gray */
 };
 /* not used for now, but should be for error-checking:
 static int num_rgb = sizeof(rgb) / sizeof(struct rgb_color);
@@ -193,6 +243,7 @@ static struct background_pattern {
     int rgb1_max, rgb1_min;     /* or bg_freq, bg_gray */
     int rgb2_max, rgb2_min;     /* or bg_bsat, bg_brot (both scaled by 10)*/
 } bg[] = {
+    {0,     1,1, 16,16},        /* checkered:  white vs. light gray (basic) */
     {0+8,   2,0,  1,15},        /* checkered:  tan/black vs. white/ice blue */
     {0+24,  2,0,  1,0},         /* checkered:  tan/black vs. white/black */
     {0+8,   4,5,  0,2},         /* checkered:  gold/yellow vs. black/tan */
@@ -244,6 +295,10 @@ int main(int argc, char **argv)
     int error = 0;
     int timing = FALSE;
     int have_bg = FALSE;
+#ifdef FEATURE_LOOP
+    int loop = FALSE;
+    long loop_interval = -1;		/* seconds (100,000 max) */
+#endif
     double LUT_exponent;                /* just the lookup table */
     double CRT_exponent = 2.2;          /* just the monitor */
     double default_display_exponent;    /* whole display system */
@@ -344,13 +399,12 @@ int main(int argc, char **argv)
             if (!*++argv)
                 ++error;
             else {
-                pat = atoi(*argv) - 1;
+                pat = atoi(*argv);
-                if (pat < 0 || pat >= num_bgpat)
+                if (pat >= 0 && pat < num_bgpat) {
-                    ++error;
-                else {
                     bg_image = TRUE;
                     have_bg = FALSE;
-                }
+                } else
+                    ++error;
             }
         } else if (!strncmp(*argv, "-usleep", 2)) {
             if (!*++argv)
@@ -363,7 +417,21 @@ int main(int argc, char **argv)
             pause_after_pass = TRUE;
         } else if (!strncmp(*argv, "-timing", 2)) {
             timing = TRUE;
-#if (defined(__i386__) || defined(_M_IX86))
+#ifdef FEATURE_LOOP
+        } else if (!strncmp(*argv, "-loop", 2)) {
+            loop = TRUE;
+            if (!argv[1] || !is_number(argv[1]))
+                loop_interval = 2;
+            else {
+                ++argv;
+                loop_interval = atol(*argv);
+                if (loop_interval < 0)
+                    loop_interval = 2;
+                else if (loop_interval > 100000)   /* bit more than one day */
+                    loop_interval = 100000;
+            }
+#endif
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
         } else if (!strncmp(*argv, "-nommxfilters", 7)) {
             rpng2_info.nommxfilters = TRUE;
         } else if (!strncmp(*argv, "-nommxcombine", 7)) {
@@ -434,10 +502,14 @@ int main(int argc, char **argv)
         readpng2_version_info();
         fprintf(stderr, "\n"
           "Usage:  %s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n"
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
           "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
 #endif
+#ifdef FEATURE_LOOP
+          "        %*s [-usleep dur | -timing] [-pause] [-loop [sec]] file.png\n\n"
+#else
           "        %*s [-usleep dur | -timing] [-pause] file.png\n\n"
+#endif
           "    xdpy\tname of the target X display (e.g., ``hostname:0'')\n"
           "    exp \ttransfer-function exponent (``gamma'') of the display\n"
           "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
@@ -446,9 +518,14 @@ int main(int argc, char **argv)
           "    bg  \tdesired background color in 7-character hex RGB format\n"
           "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
           "\t\t  used with transparent images; overrides -bgpat\n"
-          "    pat \tdesired background pattern number (1-%d); used with\n"
+          "    pat \tdesired background pattern number (0-%d); used with\n"
           "\t\t  transparent images; overrides -bgcolor\n"
-#if (defined(__i386__) || defined(_M_IX86))
+#ifdef FEATURE_LOOP
+          "    -loop\tloops through background images after initial display\n"
+          "\t\t  is complete (depends on -bgpat)\n"
+          "    sec \tseconds to display each background image (default = 2)\n"
+#endif
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
           "    -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
           "\t\t  combining rows, and expanding interlacing, respectively\n"
 #endif
@@ -460,10 +537,10 @@ int main(int argc, char **argv)
           "\nPress Q, Esc or mouse button 1 (within image window, after image\n"
           "is displayed) to quit.\n"
           "\n", PROGNAME,
-#if (defined(__i386__) || defined(_M_IX86))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
-          strlen(PROGNAME), " ",
+          (int)strlen(PROGNAME), " ",
 #endif
-          strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
+          (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat-1);
         exit(1);
     }
 
@@ -530,13 +607,111 @@ int main(int argc, char **argv)
     }
 
 
+#ifdef FEATURE_LOOP
+
+    if (loop && bg_image) {
+        for (;;) {
+            int i, use_sleep;
+            struct timeval now, then;
+
+            /* get current time and add loop_interval to get target time */
+            if (gettimeofday(&then, NULL) == 0) {
+                then.tv_sec += loop_interval;
+                use_sleep = FALSE;
+            } else
+                use_sleep = TRUE;
+
+            /* do quick check for a quit event but don't wait for it */
+            /* GRR BUG:  should also check for Expose events and redraw... */
+            if (XCheckMaskEvent(display, KeyPressMask | ButtonPressMask, &e))
+                if (QUIT(e,k))
+                    break;
+
+            /* generate next background image */
+            if (++pat >= num_bgpat)
+                pat = 0;
+            rpng2_x_reload_bg_image();
+
+            /* wait for timeout, using whatever means are available */
+            if (use_sleep || gettimeofday(&now, NULL) != 0) {
+                for (i = loop_interval;  i > 0;  --i) {
+                    sleep(1);
+                    /* GRR BUG:  also need to check for Expose (and redraw!) */
+                    if (XCheckMaskEvent(display, KeyPressMask | ButtonPressMask,
+                        &e) && QUIT(e,k))
+                        break;
+                }
+            } else {
+                /* Y2038 BUG! */
+                if (now.tv_sec < then.tv_sec ||
+                    (now.tv_sec == then.tv_sec && now.tv_usec < then.tv_usec))
+                {
+                    int quit = FALSE;
+                    long seconds_to_go = then.tv_sec - now.tv_sec;
+                    long usleep_usec;
+
+                    /* basically chew up most of remaining loop-interval with
+                     *  calls to sleep(1) interleaved with checks for quit
+                     *  events, but also recalc time-to-go periodically; when
+                     *  done, clean up any remaining time with usleep() call
+                     *  (could also use SIGALRM, but signals are a pain...) */
+                    while (seconds_to_go-- > 1) {
+                        int seconds_done = 0;
+
+                        for (i = seconds_to_go;  i > 0 && !quit;  --i) {
+                            sleep(1);
+                            /* GRR BUG:  need to check for Expose and redraw */
+                            if (XCheckMaskEvent(display, KeyPressMask |
+                                ButtonPressMask, &e) && QUIT(e,k))
+                                quit = TRUE;
+                            if (++seconds_done > 1000)
+                                break;   /* time to redo seconds_to_go meas. */
+                        }
+                        if (quit)
+                            break;
+
+                        /* OK, more than 1000 seconds since last check:
+                         *  correct the time-to-go measurement for drift */
+                        if (gettimeofday(&now, NULL) == 0) {
+                            if (now.tv_sec >= then.tv_sec)
+                                break;
+                            seconds_to_go = then.tv_sec - now.tv_sec;
+                        } else
+                            ++seconds_to_go;  /* restore what we subtracted */
+                    }
+                    if (quit)
+                        break;   /* breaks outer do-loop, skips redisplay */
+
+                    /* since difference between "now" and "then" is already
+                     *  eaten up to within a couple of seconds, don't need to
+                     *  worry about overflow--but might have overshot (neg.) */
+                    if (gettimeofday(&now, NULL) == 0) {
+                        usleep_usec = 1000000L*(then.tv_sec - now.tv_sec) +
+                          then.tv_usec - now.tv_usec;
+                        if (usleep_usec > 0)
+                            usleep((ulg)usleep_usec);
+                    }
+                }
+            }
+
+            /* composite image against new background and display (note that
+             *  we do not take into account the time spent doing this...) */
+            rpng2_x_redisplay_image (0, 0, rpng2_info.width, rpng2_info.height);
+        }
+
+    } else /* FALL THROUGH and do the normal thing */
+
+#endif /* FEATURE_LOOP */
+
     /* wait for the user to tell us when to quit */
 
-    do
+    do {
         XNextEvent(display, &e);
-    while (!(e.type == ButtonPress && e.xbutton.button == Button1) &&
+        if (e.type == Expose) {
-           !(e.type == KeyPress &&    /*  v--- or 1 for shifted keys */
+            XExposeEvent *ex = (XExposeEvent *)&e;
-             ((k = XLookupKeysym(&e.xkey, 0)) == XK_q || k == XK_Escape) ));
+            rpng2_x_redisplay_image (ex->x, ex->y, ex->width, ex->height);
+        }
+    } while (!QUIT(e,k));
 
 
     /* we're done:  clean up all image and X resources and go away */
@@ -594,7 +769,6 @@ static void rpng2_x_init(void)
          * If we/it segfault instead, seems like a libpng bug... */
 
         /* we're here via libpng callback, so if window fails, clean and bail */
-printf("readpng2_cleanup.\n");
         readpng2_cleanup(&rpng2_info);
         rpng2_x_cleanup();
         exit(2);
@@ -619,11 +793,12 @@ static int rpng2_x_create_window(void)
     XEvent e;
     XGCValues gcvalues;
     XSetWindowAttributes attr;
-    XSizeHints *size_hints;
     XTextProperty windowName, *pWindowName = &windowName;
     XTextProperty iconName, *pIconName = &iconName;
     XVisualInfo visual_info;
+    XSizeHints *size_hints;
     XWMHints *wm_hints;
+    XClassHint *class_hints;
 
 
     Trace((stderr, "beginning rpng2_x_create_window()\n"))
@@ -746,8 +921,13 @@ static int rpng2_x_create_window(void)
         wm_hints->flags = StateHint | InputHint  /* | IconPixmapHint */ ;
     }
 
+    if ((class_hints = XAllocClassHint()) != NULL) {
+        class_hints->res_name = res_name;
+        class_hints->res_class = res_class;
+    }
+
     XSetWMProperties(display, window, pWindowName, pIconName, NULL, 0,
-      size_hints, wm_hints, NULL);
+      size_hints, wm_hints, class_hints);
 
     /* various properties and hints no longer needed; free memory */
     if (pWindowName)
@@ -758,6 +938,8 @@ static int rpng2_x_create_window(void)
         XFree(size_hints);
     if (wm_hints)
        XFree(wm_hints);
+    if (class_hints)
+       XFree(class_hints);
 
     XMapWindow(display, window);
 
@@ -855,7 +1037,7 @@ static int rpng2_x_load_bg_image(void)
     uch r1, r2, g1, g2, b1, b2;
     uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv;
     int k, hmax, max;
-    int xidx, yidx, yidx_max = (bgscale-1);
+    int xidx, yidx, yidx_max;
     int even_odd_vert, even_odd_horiz, even_odd;
     int invert_gradient2 = (bg[pat].type & 0x08);
     int invert_column;
@@ -877,6 +1059,9 @@ static int rpng2_x_load_bg_image(void)
         return 1;
     }
 
+    bgscale = (pat == 0)? 8 : bgscale_default;
+    yidx_max = bgscale - 1;
+
 /*---------------------------------------------------------------------------
     Vertical gradients (ramps) in NxN squares, alternating direction and
     colors (N == bgscale).
@@ -1068,10 +1253,12 @@ static int rpng2_x_load_bg_image(void)
 
     if (depth == 24 || depth == 32) {
         ulg red, green, blue;
+        int bpp = ximage->bits_per_pixel;
 
         for (row = 0;  row < rpng2_info.height;  ++row) {
             src = bg_data + row*bg_rowbytes;
             dest = ximage->data + row*ximage_rowbytes;
+            if (bpp == 32) {	/* slightly optimized version */
                 for (i = rpng2_info.width;  i > 0;  --i) {
                     red   = *src++;
                     green = *src++;
@@ -1080,12 +1267,27 @@ static int rpng2_x_load_bg_image(void)
                             (green << GShift) |
                             (blue  << BShift);
                     /* recall that we set ximage->byte_order = MSBFirst above */
-                /* GRR BUG:  this assumes bpp == 32, but may be 24: */
                     *dest++ = (char)((pixel >> 24) & 0xff);
                     *dest++ = (char)((pixel >> 16) & 0xff);
                     *dest++ = (char)((pixel >>  8) & 0xff);
                     *dest++ = (char)( pixel        & 0xff);
                 }
+            } else {
+                for (i = rpng2_info.width;  i > 0;  --i) {
+                    red   = *src++;
+                    green = *src++;
+                    blue  = *src++;
+                    pixel = (red   << RShift) |
+                            (green << GShift) |
+                            (blue  << BShift);
+                    /* recall that we set ximage->byte_order = MSBFirst above */
+                    /* GRR BUG?  this assumes bpp == 24 & bits are packed low */
+                    /*           (probably need to use RShift, RMask, etc.) */
+                    *dest++ = (char)((pixel >> 16) & 0xff);
+                    *dest++ = (char)((pixel >>  8) & 0xff);
+                    *dest++ = (char)( pixel        & 0xff);
+                }
+            }
         }
 
     } else if (depth == 16) {
@@ -1155,10 +1357,7 @@ static void rpng2_x_display_row(ulg row)
               PROGNAME, prevpass + 1);
             do
                 XNextEvent(display, &e);
-            while (!(e.type == ButtonPress && e.xbutton.button == Button1)
+            while (!QUIT(e,k));
-                   && !(e.type == KeyPress &&
-                   ((k = XLookupKeysym(&e.xkey, 0)) == XK_q
-                    || k == XK_Escape) )) ;
         }
         fprintf(stderr, "%s:  pass %d of 7\r", PROGNAME, rpng2_info.pass + 1);
         fflush(stderr);
@@ -1179,6 +1378,7 @@ static void rpng2_x_display_row(ulg row)
 
     if (depth == 24 || depth == 32) {
         ulg red, green, blue;
+        int bpp = ximage->bits_per_pixel;
 
         src = rpng2_info.image_data + row*rpng2_info.rowbytes;
         if (bg_image)
@@ -1193,11 +1393,18 @@ static void rpng2_x_display_row(ulg row)
                         (green << GShift) |
                         (blue  << BShift);
                 /* recall that we set ximage->byte_order = MSBFirst above */
-                /* GRR BUG:  this assumes bpp == 32, but may be 24: */
+                if (bpp == 32) {
                     *dest++ = (char)((pixel >> 24) & 0xff);
                     *dest++ = (char)((pixel >> 16) & 0xff);
                     *dest++ = (char)((pixel >>  8) & 0xff);
                     *dest++ = (char)( pixel        & 0xff);
+                } else {
+                    /* GRR BUG?  this assumes bpp == 24 & bits are packed low */
+                    /*           (probably need to use RShift, RMask, etc.) */
+                    *dest++ = (char)((pixel >> 16) & 0xff);
+                    *dest++ = (char)((pixel >>  8) & 0xff);
+                    *dest++ = (char)( pixel        & 0xff);
+                }
             }
         } else /* if (rpng2_info.channels == 4) */ {
             for (i = rpng2_info.width;  i > 0;  --i) {
@@ -1230,11 +1437,18 @@ static void rpng2_x_display_row(ulg row)
                         (green << GShift) |
                         (blue  << BShift);
                 /* recall that we set ximage->byte_order = MSBFirst above */
-                /* GRR BUG:  this assumes bpp == 32, but may be 24: */
+                if (bpp == 32) {
                     *dest++ = (char)((pixel >> 24) & 0xff);
                     *dest++ = (char)((pixel >> 16) & 0xff);
                     *dest++ = (char)((pixel >>  8) & 0xff);
                     *dest++ = (char)( pixel        & 0xff);
+                } else {
+                    /* GRR BUG?  this assumes bpp == 24 & bits are packed low */
+                    /*           (probably need to use RShift, RMask, etc.) */
+                    *dest++ = (char)((pixel >> 16) & 0xff);
+                    *dest++ = (char)((pixel >>  8) & 0xff);
+                    *dest++ = (char)( pixel        & 0xff);
+                }
             }
         }
 
@@ -1352,6 +1566,472 @@ static void rpng2_x_finish_display(void)
 
 
 
+static void rpng2_x_redisplay_image(ulg startcol, ulg startrow,
+                                    ulg width, ulg height)
+{
+    uch bg_red   = rpng2_info.bg_red;
+    uch bg_green = rpng2_info.bg_green;
+    uch bg_blue  = rpng2_info.bg_blue;
+    uch *src, *src2=NULL;
+    char *dest;
+    uch r, g, b, a;
+    ulg i, row, lastrow = 0;
+    ulg pixel;
+    int ximage_rowbytes = ximage->bytes_per_line;
+
+
+    Trace((stderr, "beginning display loop (image_channels == %d)\n",
+      image_channels))
+    Trace((stderr, "   (width = %ld, rowbytes = %ld, ximage_rowbytes = %d)\n",
+      rpng2_info.width, image_rowbytes, ximage_rowbytes))
+    Trace((stderr, "   (bpp = %d)\n", ximage->bits_per_pixel))
+    Trace((stderr, "   (byte_order = %s)\n", ximage->byte_order == MSBFirst?
+      "MSBFirst" : (ximage->byte_order == LSBFirst? "LSBFirst" : "unknown")))
+
+/*---------------------------------------------------------------------------
+    Aside from the use of the rpng2_info struct and of src2 (for background
+    image), this routine is identical to rpng_x_display_image() in the non-
+    progressive version of the program--for the simple reason that redisplay
+    of the image against a new background happens after the image is fully
+    decoded and therefore is, by definition, non-progressive.
+  ---------------------------------------------------------------------------*/
+
+    if (depth == 24 || depth == 32) {
+        ulg red, green, blue;
+        int bpp = ximage->bits_per_pixel;
+
+        for (lastrow = row = startrow;  row < startrow+height;  ++row) {
+            src = rpng2_info.image_data + row*rpng2_info.rowbytes;
+            if (bg_image)
+                src2 = bg_data + row*bg_rowbytes;
+            dest = ximage->data + row*ximage_rowbytes;
+            if (rpng2_info.channels == 3) {
+                for (i = rpng2_info.width;  i > 0;  --i) {
+                    red   = *src++;
+                    green = *src++;
+                    blue  = *src++;
+#ifdef NO_24BIT_MASKS
+                    pixel = (red   << RShift) |
+                            (green << GShift) |
+                            (blue  << BShift);
+                    /* recall that we set ximage->byte_order = MSBFirst above */
+                    if (bpp == 32) {
+                        *dest++ = (char)((pixel >> 24) & 0xff);
+                        *dest++ = (char)((pixel >> 16) & 0xff);
+                        *dest++ = (char)((pixel >>  8) & 0xff);
+                        *dest++ = (char)( pixel        & 0xff);
+                    } else {
+                        /* this assumes bpp == 24 & bits are packed low */
+                        /* (probably need to use RShift, RMask, etc.) */
+                        *dest++ = (char)((pixel >> 16) & 0xff);
+                        *dest++ = (char)((pixel >>  8) & 0xff);
+                        *dest++ = (char)( pixel        & 0xff);
+                    }
+#else
+                    red   = (RShift < 0)? red   << (-RShift) : red   >> RShift;
+                    green = (GShift < 0)? green << (-GShift) : green >> GShift;
+                    blue  = (BShift < 0)? blue  << (-BShift) : blue  >> BShift;
+                    pixel = (red & RMask) | (green & GMask) | (blue & BMask);
+                    /* recall that we set ximage->byte_order = MSBFirst above */
+                    if (bpp == 32) {
+                        *dest++ = (char)((pixel >> 24) & 0xff);
+                        *dest++ = (char)((pixel >> 16) & 0xff);
+                        *dest++ = (char)((pixel >>  8) & 0xff);
+                        *dest++ = (char)( pixel        & 0xff);
+                    } else {
+                        /* GRR BUG */
+                        /* this assumes bpp == 24 & bits are packed low */
+                        /* (probably need to use RShift/RMask/etc. here, too) */
+                        *dest++ = (char)((pixel >> 16) & 0xff);
+                        *dest++ = (char)((pixel >>  8) & 0xff);
+                        *dest++ = (char)( pixel        & 0xff);
+                    }
+#endif
+                }
+
+            } else /* if (rpng2_info.channels == 4) */ {
+                for (i = rpng2_info.width;  i > 0;  --i) {
+                    r = *src++;
+                    g = *src++;
+                    b = *src++;
+                    a = *src++;
+                    if (bg_image) {
+                        bg_red   = *src2++;
+                        bg_green = *src2++;
+                        bg_blue  = *src2++;
+                    }
+                    if (a == 255) {
+                        red   = r;
+                        green = g;
+                        blue  = b;
+                    } else if (a == 0) {
+                        red   = bg_red;
+                        green = bg_green;
+                        blue  = bg_blue;
+                    } else {
+                        /* this macro (from png.h) composites the foreground
+                         * and background values and puts the result into the
+                         * first argument */
+                        alpha_composite(red,   r, a, bg_red);
+                        alpha_composite(green, g, a, bg_green);
+                        alpha_composite(blue,  b, a, bg_blue);
+                    }
+#ifdef NO_24BIT_MASKS
+                    pixel = (red   << RShift) |
+                            (green << GShift) |
+                            (blue  << BShift);
+                    /* recall that we set ximage->byte_order = MSBFirst above */
+                    if (bpp == 32) {
+                        *dest++ = (char)((pixel >> 24) & 0xff);
+                        *dest++ = (char)((pixel >> 16) & 0xff);
+                        *dest++ = (char)((pixel >>  8) & 0xff);
+                        *dest++ = (char)( pixel        & 0xff);
+                    } else {
+                        /* this assumes bpp == 24 & bits are packed low */
+                        /* (probably need to use RShift, RMask, etc.) */
+                        *dest++ = (char)((pixel >> 16) & 0xff);
+                        *dest++ = (char)((pixel >>  8) & 0xff);
+                        *dest++ = (char)( pixel        & 0xff);
+                    }
+#else
+                    red   = (RShift < 0)? red   << (-RShift) : red   >> RShift;
+                    green = (GShift < 0)? green << (-GShift) : green >> GShift;
+                    blue  = (BShift < 0)? blue  << (-BShift) : blue  >> BShift;
+                    pixel = (red & RMask) | (green & GMask) | (blue & BMask);
+                    /* recall that we set ximage->byte_order = MSBFirst above */
+                    if (bpp == 32) {
+                        *dest++ = (char)((pixel >> 24) & 0xff);
+                        *dest++ = (char)((pixel >> 16) & 0xff);
+                        *dest++ = (char)((pixel >>  8) & 0xff);
+                        *dest++ = (char)( pixel        & 0xff);
+                    } else {
+                        /* GRR BUG */
+                        /* this assumes bpp == 24 & bits are packed low */
+                        /* (probably need to use RShift/RMask/etc. here, too) */
+                        *dest++ = (char)((pixel >> 16) & 0xff);
+                        *dest++ = (char)((pixel >>  8) & 0xff);
+                        *dest++ = (char)( pixel        & 0xff);
+                    }
+#endif
+                }
+            }
+            /* display after every 16 lines */
+            if (((row+1) & 0xf) == 0) {
+                XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0,
+                  (int)lastrow, rpng2_info.width, 16);
+                XFlush(display);
+                lastrow = row + 1;
+            }
+        }
+
+    } else if (depth == 16) {
+        ush red, green, blue;
+
+        for (lastrow = row = startrow;  row < startrow+height;  ++row) {
+            src = rpng2_info.row_pointers[row];
+            if (bg_image)
+                src2 = bg_data + row*bg_rowbytes;
+            dest = ximage->data + row*ximage_rowbytes;
+            if (rpng2_info.channels == 3) {
+                for (i = rpng2_info.width;  i > 0;  --i) {
+                    red   = ((ush)(*src) << 8);
+                    ++src;
+                    green = ((ush)(*src) << 8);
+                    ++src;
+                    blue  = ((ush)(*src) << 8);
+                    ++src;
+                    pixel = ((red   >> RShift) & RMask) |
+                            ((green >> GShift) & GMask) |
+                            ((blue  >> BShift) & BMask);
+                    /* recall that we set ximage->byte_order = MSBFirst above */
+                    *dest++ = (char)((pixel >>  8) & 0xff);
+                    *dest++ = (char)( pixel        & 0xff);
+                }
+            } else /* if (rpng2_info.channels == 4) */ {
+                for (i = rpng2_info.width;  i > 0;  --i) {
+                    r = *src++;
+                    g = *src++;
+                    b = *src++;
+                    a = *src++;
+                    if (bg_image) {
+                        bg_red   = *src2++;
+                        bg_green = *src2++;
+                        bg_blue  = *src2++;
+                    }
+                    if (a == 255) {
+                        red   = ((ush)r << 8);
+                        green = ((ush)g << 8);
+                        blue  = ((ush)b << 8);
+                    } else if (a == 0) {
+                        red   = ((ush)bg_red   << 8);
+                        green = ((ush)bg_green << 8);
+                        blue  = ((ush)bg_blue  << 8);
+                    } else {
+                        /* this macro (from png.h) composites the foreground
+                         * and background values and puts the result back into
+                         * the first argument (== fg byte here:  safe) */
+                        alpha_composite(r, r, a, bg_red);
+                        alpha_composite(g, g, a, bg_green);
+                        alpha_composite(b, b, a, bg_blue);
+                        red   = ((ush)r << 8);
+                        green = ((ush)g << 8);
+                        blue  = ((ush)b << 8);
+                    }
+                    pixel = ((red   >> RShift) & RMask) |
+                            ((green >> GShift) & GMask) |
+                            ((blue  >> BShift) & BMask);
+                    /* recall that we set ximage->byte_order = MSBFirst above */
+                    *dest++ = (char)((pixel >>  8) & 0xff);
+                    *dest++ = (char)( pixel        & 0xff);
+                }
+            }
+            /* display after every 16 lines */
+            if (((row+1) & 0xf) == 0) {
+                XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0,
+                  (int)lastrow, rpng2_info.width, 16);
+                XFlush(display);
+                lastrow = row + 1;
+            }
+        }
+
+    } else /* depth == 8 */ {
+
+        /* GRR:  add 8-bit support */
+
+    }
+
+    Trace((stderr, "calling final XPutImage()\n"))
+    if (lastrow < startrow+height) {
+        XPutImage(display, window, gc, ximage, 0, (int)lastrow, 0,
+          (int)lastrow, rpng2_info.width, rpng2_info.height-lastrow);
+        XFlush(display);
+    }
+
+} /* end function rpng2_x_redisplay_image() */
+
+
+
+
+
+#ifdef FEATURE_LOOP
+
+static void rpng2_x_reload_bg_image(void)
+{
+    char *dest;
+    uch r1, r2, g1, g2, b1, b2;
+    uch r1_inv, r2_inv, g1_inv, g2_inv, b1_inv, b2_inv;
+    int k, hmax, max;
+    int xidx, yidx, yidx_max;
+    int even_odd_vert, even_odd_horiz, even_odd;
+    int invert_gradient2 = (bg[pat].type & 0x08);
+    int invert_column;
+    ulg i, row;
+
+
+    bgscale = (pat == 0)? 8 : bgscale_default;
+    yidx_max = bgscale - 1;
+
+/*---------------------------------------------------------------------------
+    Vertical gradients (ramps) in NxN squares, alternating direction and
+    colors (N == bgscale).
+  ---------------------------------------------------------------------------*/
+
+    if ((bg[pat].type & 0x07) == 0) {
+        uch r1_min  = rgb[bg[pat].rgb1_min].r;
+        uch g1_min  = rgb[bg[pat].rgb1_min].g;
+        uch b1_min  = rgb[bg[pat].rgb1_min].b;
+        uch r2_min  = rgb[bg[pat].rgb2_min].r;
+        uch g2_min  = rgb[bg[pat].rgb2_min].g;
+        uch b2_min  = rgb[bg[pat].rgb2_min].b;
+        int r1_diff = rgb[bg[pat].rgb1_max].r - r1_min;
+        int g1_diff = rgb[bg[pat].rgb1_max].g - g1_min;
+        int b1_diff = rgb[bg[pat].rgb1_max].b - b1_min;
+        int r2_diff = rgb[bg[pat].rgb2_max].r - r2_min;
+        int g2_diff = rgb[bg[pat].rgb2_max].g - g2_min;
+        int b2_diff = rgb[bg[pat].rgb2_max].b - b2_min;
+
+        for (row = 0;  row < rpng2_info.height;  ++row) {
+            yidx = (int)(row % bgscale);
+            even_odd_vert = (int)((row / bgscale) & 1);
+
+            r1 = r1_min + (r1_diff * yidx) / yidx_max;
+            g1 = g1_min + (g1_diff * yidx) / yidx_max;
+            b1 = b1_min + (b1_diff * yidx) / yidx_max;
+            r1_inv = r1_min + (r1_diff * (yidx_max-yidx)) / yidx_max;
+            g1_inv = g1_min + (g1_diff * (yidx_max-yidx)) / yidx_max;
+            b1_inv = b1_min + (b1_diff * (yidx_max-yidx)) / yidx_max;
+
+            r2 = r2_min + (r2_diff * yidx) / yidx_max;
+            g2 = g2_min + (g2_diff * yidx) / yidx_max;
+            b2 = b2_min + (b2_diff * yidx) / yidx_max;
+            r2_inv = r2_min + (r2_diff * (yidx_max-yidx)) / yidx_max;
+            g2_inv = g2_min + (g2_diff * (yidx_max-yidx)) / yidx_max;
+            b2_inv = b2_min + (b2_diff * (yidx_max-yidx)) / yidx_max;
+
+            dest = (char *)bg_data + row*bg_rowbytes;
+            for (i = 0;  i < rpng2_info.width;  ++i) {
+                even_odd_horiz = (int)((i / bgscale) & 1);
+                even_odd = even_odd_vert ^ even_odd_horiz;
+                invert_column =
+                  (even_odd_horiz && (bg[pat].type & 0x10));
+                if (even_odd == 0) {        /* gradient #1 */
+                    if (invert_column) {
+                        *dest++ = r1_inv;
+                        *dest++ = g1_inv;
+                        *dest++ = b1_inv;
+                    } else {
+                        *dest++ = r1;
+                        *dest++ = g1;
+                        *dest++ = b1;
+                    }
+                } else {                    /* gradient #2 */
+                    if ((invert_column && invert_gradient2) ||
+                        (!invert_column && !invert_gradient2))
+                    {
+                        *dest++ = r2;       /* not inverted or */
+                        *dest++ = g2;       /*  doubly inverted */
+                        *dest++ = b2;
+                    } else {
+                        *dest++ = r2_inv;
+                        *dest++ = g2_inv;   /* singly inverted */
+                        *dest++ = b2_inv;
+                    }
+                }
+            }
+        }
+
+/*---------------------------------------------------------------------------
+    Soft gradient-diamonds with scale = bgscale.  Code contributed by Adam
+    M. Costello.
+  ---------------------------------------------------------------------------*/
+
+    } else if ((bg[pat].type & 0x07) == 1) {
+
+        hmax = (bgscale-1)/2;   /* half the max weight of a color */
+        max = 2*hmax;           /* the max weight of a color */
+
+        r1 = rgb[bg[pat].rgb1_max].r;
+        g1 = rgb[bg[pat].rgb1_max].g;
+        b1 = rgb[bg[pat].rgb1_max].b;
+        r2 = rgb[bg[pat].rgb2_max].r;
+        g2 = rgb[bg[pat].rgb2_max].g;
+        b2 = rgb[bg[pat].rgb2_max].b;
+
+        for (row = 0;  row < rpng2_info.height;  ++row) {
+            yidx = (int)(row % bgscale);
+            if (yidx > hmax)
+                yidx = bgscale-1 - yidx;
+            dest = (char *)bg_data + row*bg_rowbytes;
+            for (i = 0;  i < rpng2_info.width;  ++i) {
+                xidx = (int)(i % bgscale);
+                if (xidx > hmax)
+                    xidx = bgscale-1 - xidx;
+                k = xidx + yidx;
+                *dest++ = (k*r1 + (max-k)*r2) / max;
+                *dest++ = (k*g1 + (max-k)*g2) / max;
+                *dest++ = (k*b1 + (max-k)*b2) / max;
+            }
+        }
+
+/*---------------------------------------------------------------------------
+    Radial "starburst" with azimuthal sinusoids; [eventually number of sinu-
+    soids will equal bgscale?].  This one is slow but very cool.  Code con-
+    tributed by Pieter S. van der Meulen (originally in Smalltalk).
+  ---------------------------------------------------------------------------*/
+
+    } else if ((bg[pat].type & 0x07) == 2) {
+        uch ch;
+        int ii, x, y, hw, hh, grayspot;
+        double freq, rotate, saturate, gray, intensity;
+        double angle=0.0, aoffset=0.0, maxDist, dist;
+        double red=0.0, green=0.0, blue=0.0, hue, s, v, f, p, q, t;
+
+        hh = (int)(rpng2_info.height / 2);
+        hw = (int)(rpng2_info.width / 2);
+
+        /* variables for radial waves:
+         *   aoffset:  number of degrees to rotate hue [CURRENTLY NOT USED]
+         *   freq:  number of color beams originating from the center
+         *   grayspot:  size of the graying center area (anti-alias)
+         *   rotate:  rotation of the beams as a function of radius
+         *   saturate:  saturation of beams' shape azimuthally
+         */
+        angle = CLIP(angle, 0.0, 360.0);
+        grayspot = CLIP(bg[pat].bg_gray, 1, (hh + hw));
+        freq = MAX((double)bg[pat].bg_freq, 0.0);
+        saturate = (double)bg[pat].bg_bsat * 0.1;
+        rotate = (double)bg[pat].bg_brot * 0.1;
+        gray = 0.0;
+        intensity = 0.0;
+        maxDist = (double)((hw*hw) + (hh*hh));
+
+        for (row = 0;  row < rpng2_info.height;  ++row) {
+            y = (int)(row - hh);
+            dest = (char *)bg_data + row*bg_rowbytes;
+            for (i = 0;  i < rpng2_info.width;  ++i) {
+                x = (int)(i - hw);
+                angle = (x == 0)? PI_2 : atan((double)y / (double)x);
+                gray = (double)MAX(ABS(y), ABS(x)) / grayspot;
+                gray = MIN(1.0, gray);
+                dist = (double)((x*x) + (y*y)) / maxDist;
+                intensity = cos((angle+(rotate*dist*PI)) * freq) *
+                  gray * saturate;
+                intensity = (MAX(MIN(intensity,1.0),-1.0) + 1.0) * 0.5;
+                hue = (angle + PI) * INV_PI_360 + aoffset;
+                s = gray * ((double)(ABS(x)+ABS(y)) / (double)(hw + hh));
+                s = MIN(MAX(s,0.0), 1.0);
+                v = MIN(MAX(intensity,0.0), 1.0);
+
+                if (s == 0.0) {
+                    ch = (uch)(v * 255.0);
+                    *dest++ = ch;
+                    *dest++ = ch;
+                    *dest++ = ch;
+                } else {
+                    if ((hue < 0.0) || (hue >= 360.0))
+                        hue -= (((int)(hue / 360.0)) * 360.0);
+                    hue /= 60.0;
+                    ii = (int)hue;
+                    f = hue - (double)ii;
+                    p = (1.0 - s) * v;
+                    q = (1.0 - (s * f)) * v;
+                    t = (1.0 - (s * (1.0 - f))) * v;
+                    if      (ii == 0) { red = v; green = t; blue = p; }
+                    else if (ii == 1) { red = q; green = v; blue = p; }
+                    else if (ii == 2) { red = p; green = v; blue = t; }
+                    else if (ii == 3) { red = p; green = q; blue = v; }
+                    else if (ii == 4) { red = t; green = p; blue = v; }
+                    else if (ii == 5) { red = v; green = p; blue = q; }
+                    *dest++ = (uch)(red * 255.0);
+                    *dest++ = (uch)(green * 255.0);
+                    *dest++ = (uch)(blue * 255.0);
+                }
+            }
+        }
+    }
+
+} /* end function rpng2_x_reload_bg_image() */
+
+
+
+
+
+static int is_number(char *p)
+{
+    while (*p) {
+        if (!isdigit(*p))
+            return FALSE;
+        ++p;
+    }
+    return TRUE;
+}
+
+#endif /* FEATURE_LOOP */
+
+
+
+
+
 static void rpng2_x_cleanup(void)
 {
     if (bg_image && bg_data) {

contrib/gregbook/wpng.c

@@ -5,8 +5,10 @@
    This program converts certain NetPBM binary files (grayscale and RGB,
    maxval = 255) to PNG.  Non-interlaced PNGs are written progressively;
    interlaced PNGs are read and written in one memory-intensive blast.
+
    Thanks to Jean-loup Gailly for providing the necessary trick to read
-   interactive text from the keyboard while stdin is redirected.
+   interactive text from the keyboard while stdin is redirected.  Thanks
+   to Cosmin Truta for Cygwin fixes.
 
    NOTE:  includes provisional support for PNM type "8" (portable alphamap)
           images, presumed to be a 32-bit interleaved RGBA format; no pro-
@@ -24,16 +26,32 @@
     - 1.02:  modified to allow abbreviated options
     - 1.03:  removed extraneous character from usage screen; fixed bug in
               command-line parsing
+    - 1.04:  fixed DOS/OS2/Win32 detection, including partial Cygwin fix
+              (see http://home.att.net/~perlspinr/diffs/GregBook_cygwin.diff)
+    - 2.00:  dual-licensed (added GNU GPL)
+
+        [REPORTED BUG (win32 only):  "contrib/gregbook/wpng.c - cmd line
+         dose not work!  In order to do something useful I needed to redirect
+         both input and output, with cygwin and with bcc32 as well.  Under
+         Linux, the same wpng appears to work fine.  I don't know what is
+         the problem."]
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -50,17 +68,36 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #define PROGNAME  "wpng"
-#define VERSION   "1.03 of 19 March 2000"
+#define VERSION   "2.00 of 2 June 2007"
 #define APPNAME   "Simple PGM/PPM/PAM to PNG Converter"
 
 #if defined(__MSDOS__) || defined(__OS2__)
 #  define DOS_OS2_W32
-#elif defined(_WIN32) || defined(__WIN32__)
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
+#  ifndef __GNUC__   /* treat Win32 native ports of gcc as Unix environments */
 #    define DOS_OS2_W32
 #  endif
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>

contrib/gregbook/writepng.c

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 

contrib/gregbook/writepng.h

@@ -4,13 +4,20 @@
 
   ---------------------------------------------------------------------------
 
-      Copyright (c) 1998-2000 Greg Roelofs.  All rights reserved.
+      Copyright (c) 1998-2007 Greg Roelofs.  All rights reserved.
 
       This software is provided "as is," without warranty of any kind,
       express or implied.  In no event shall the author or contributors
       be held liable for any damages arising in any way from the use of
       this software.
 
+      The contents of this file are DUAL-LICENSED.  You may modify and/or
+      redistribute this software according to the terms of one of the
+      following two licenses (at your option):
+
+
+      LICENSE 1 ("BSD-like with advertising clause"):
+
       Permission is granted to anyone to use this software for any purpose,
       including commercial applications, and to alter it and redistribute
       it freely, subject to the following restrictions:
@@ -27,6 +34,23 @@
             and contributors for the book, "PNG: The Definitive Guide,"
             published by O'Reilly and Associates.
 
+
+      LICENSE 2 (GNU GPL v2 or later):
+
+      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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
   ---------------------------------------------------------------------------*/
 
 #ifndef TRUE

libpng-1.2.19beta16.txt

@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.19beta15 - June 17, 2007
+ libpng version 1.2.19beta16 - June 19, 2007
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2007 Glenn Randers-Pehrson
@@ -2921,13 +2921,13 @@ application:
 
 IX. Y2K Compliance in libpng
 
-June 17, 2007
+June 19, 2007
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.2.19beta15 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.19beta16 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that

libpng.3

@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "June 17, 2007"
+.TH LIBPNG 3 "June 19, 2007"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.19beta15
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.19beta16
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -410,7 +410,7 @@ Following is a copy of the libpng.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.2.19beta15 - June 17, 2007
+ libpng version 1.2.19beta16 - June 19, 2007
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2007 Glenn Randers-Pehrson
@@ -3331,13 +3331,13 @@ application:
 
 .SH IX. Y2K Compliance in libpng
 
-June 17, 2007
+June 19, 2007
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.2.19beta15 are Y2K compliant.  It is my belief that earlier
+upward through 1.2.19beta16 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
@@ -3526,7 +3526,7 @@ the first widely used release:
  1.2.17              13    10217  12.so.0.17[.0]
  1.0.26              10    10026  10.so.0.26[.0]
  1.2.18              13    10218  12.so.0.18[.0]
- 1.2.19beta1-15      13    10219  12.so.0.19[.0]
+ 1.2.19beta1-16      13    10219  12.so.0.19[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -3582,7 +3582,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.2.19beta15 - June 17, 2007:
+Libpng version 1.2.19beta16 - June 19, 2007:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -3603,7 +3603,7 @@ included in the libpng distribution, the latter shall prevail.)
 If you modify libpng you may insert additional notices immediately following
 this sentence.
 
-libpng versions 1.2.6, August 15, 2004, through 1.2.19beta15, June 17, 2007, are
+libpng versions 1.2.6, August 15, 2004, through 1.2.19beta16, June 19, 2007, are
 Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -3702,7 +3702,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-June 17, 2007
+June 19, 2007
 
 .\" end of man page
 

libpngpf.3

@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "June 17, 2007"
+.TH LIBPNGPF 3 "June 19, 2007"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.2.19beta15
+libpng \- Portable Network Graphics (PNG) Reference Library 1.2.19beta16
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>\fP

png.5

@@ -1,4 +1,4 @@
-.TH PNG 5 "June 17, 2007"
+.TH PNG 5 "June 19, 2007"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION

png.c

@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -13,7 +13,7 @@
 #include "png.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_19beta15 Your_png_h_is_not_version_1_2_19beta15;
+typedef version_1_2_19beta16 Your_png_h_is_not_version_1_2_19beta16;
 
 /* Version information for C files.  This had better match the version
  * string defined in png.h.  */
@@ -706,7 +706,7 @@ png_charp PNGAPI
 png_get_copyright(png_structp png_ptr)
 {
    png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
-   return ((png_charp) "\n libpng version 1.2.19beta15 - June 17, 2007\n\
+   return ((png_charp) "\n libpng version 1.2.19beta16 - June 19, 2007\n\
    Copyright (c) 1998-2007 Glenn Randers-Pehrson\n\
    Copyright (c) 1996-1997 Andreas Dilger\n\
    Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");

png.h

@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.2.19beta15 - June 17, 2007
+ * libpng version 1.2.19beta16 - June 19, 2007
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -9,7 +9,7 @@
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.2.19beta15 - June 17, 2007: Glenn
+ *  libpng versions 0.97, January 1998, through 1.2.19beta16 - June 19, 2007: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -150,7 +150,7 @@
  *    1.2.17                  13    10217  12.so.0.17[.0]
  *    1.0.26                  10    10026  10.so.0.26[.0]
  *    1.2.18                  13    10218  12.so.0.18[.0]
- *    1.2.19beta1-15          13    10219  12.so.0.19[.0]
+ *    1.2.19beta1-16          13    10219  12.so.0.19[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -180,7 +180,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.2.19beta15, June 17, 2007, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.2.19beta16, June 19, 2007, are
  * Copyright (c) 2004, 2006-2007 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
@@ -292,13 +292,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    June 17, 2007
+ *    June 19, 2007
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.2.19beta15 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.2.19beta16 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -354,9 +354,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.19beta15"
+#define PNG_LIBPNG_VER_STRING "1.2.19beta16"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.2.19beta15 - June 17, 2007 (header)\n"
+   " libpng version 1.2.19beta16 - June 19, 2007 (header)\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  13
@@ -368,7 +368,7 @@
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  15
+#define PNG_LIBPNG_VER_BUILD  16
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -1407,7 +1407,7 @@ struct png_struct_def
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_2_19beta15;
+typedef png_structp version_1_2_19beta16;
 
 typedef png_struct FAR * FAR * png_structpp;
 

pngconf.h

@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.2.19beta15 - June 17, 2007
+ * libpng version 1.2.19beta16 - June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

pngerror.c

@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

pnggccrd.c

@@ -3,7 +3,7 @@
  *
  * For Intel x86 CPU (Pentium-MMX or later) and GNU C compiler.
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998 Intel Corporation
  * Copyright (c) 1999-2002,2007 Greg Roelofs
@@ -327,11 +327,14 @@
  * 20070616:
  *  - finished replacing direct _FullLength accesses with register constraints
  *     (*ugly* conditional clobber-separator macros for avg and paeth, sigh)
+ *    Changed all "ifdef *" to "if defined(*)"
  *
  *
- * [TODO:  reevaluate PNG_THREAD_UNSAFE_OK blocks for non-const global-var use]
- *
  * STILL TO DO:
+ *  - fix final thread-unsafe code using stack vars and pointer? (paeth top,
+ *     default, bottom only; default, bottom already 5 reg constraints; could
+ *     replace bpp with pointer and group bpp/patemp/pbtemp/pctemp in array)
+ *  - fix ebp/no-reg-constraint inefficiency (avg/paeth/sub top)
  *  - test png_do_read_interlace() 64-bit case (pixel_bytes == 8)
  *  - write MMX code for 48-bit case (pixel_bytes == 6)
  *  - figure out what's up with 24-bit case (pixel_bytes == 3):
@@ -354,14 +357,14 @@
 
 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGGCCRD)
 
-#if defined(__x86_64__) && defined(__PIC__)
+#if defined(__x86_64__) && defined(__PIC__)  // optionally comment out __PIC__:
-#  define PNG_x86_64_USE_GOTPCREL
+#  define PNG_x86_64_USE_GOTPCREL            // GOTPCREL => full thread-safety
 #  define PNG_CLOBBER_x86_64_REGS_SUPPORTED  // works as of gcc 3.4.3 ...
 #endif
 
 int PNGAPI png_mmx_support(void);
 
-#ifdef PNG_USE_LOCAL_ARRAYS
+#if defined(PNG_USE_LOCAL_ARRAYS)
 static PNG_CONST int FARDATA png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
 static PNG_CONST int FARDATA png_pass_inc[7]   = {8, 8, 4, 4, 2, 2, 1};
 static PNG_CONST int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
@@ -400,7 +403,7 @@ static PNG_CONST int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
 #  define _amask0_2_6     amask0_2_6
 #  define _amask2_3_3     amask2_3_3
 #  define _amask4_2_2     amask4_2_2
-#  ifdef PNG_THREAD_UNSAFE_OK
+#  if defined(PNG_THREAD_UNSAFE_OK)
 #    define _patemp       patemp
 #    define _pbtemp       pbtemp
 #    define _pctemp       pctemp
@@ -412,7 +415,7 @@ static PNG_CONST int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
 
 typedef unsigned long long  ull;
 
-#ifdef PNG_x86_64_USE_GOTPCREL
+#if defined(PNG_x86_64_USE_GOTPCREL)
 static PNG_CONST struct {
     //ull _mask_array[26];
 
@@ -579,13 +582,13 @@ static PNG_CONST ull _amask4_2_2  __attribute__((used, aligned(8))) = 0x00000000
 
 
 #if defined(PNG_HAVE_MMX_READ_FILTER_ROW)
-#ifdef PNG_THREAD_UNSAFE_OK  // used only within thread-unsafe functions (at least for now)
 
-#ifdef PNG_x86_64_USE_GOTPCREL
+// this block is specific to png_read_filter_row_mmx_paeth()
+#if defined(PNG_x86_64_USE_GOTPCREL)
 #  define pa_TEMP                "%%r11d"
 #  define pb_TEMP                "%%r12d"
 #  define pc_TEMP                "%%r13d"
-#  ifdef PNG_CLOBBER_x86_64_REGS_SUPPORTED  // works as of gcc 3.4.3 ...
+#  if defined(PNG_CLOBBER_x86_64_REGS_SUPPORTED)  // works as of gcc 3.4.3 ...
 #    define SAVE_r11_r12_r13
 #    define RESTORE_r11_r12_r13
 #    define _CLOBBER_r11_r12_r13 ,"%r11", "%r12", "%r13"
@@ -604,6 +607,7 @@ static PNG_CONST ull _amask4_2_2  __attribute__((used, aligned(8))) = 0x00000000
                                  "movq  _c64@GOTPCREL(%%rip), %%rbp  \n\t"
 #  define RESTORE_rbp            "popq  %%rbp                        \n\t"
 #else // 32-bit and/or non-PIC
+#  if defined(PNG_THREAD_UNSAFE_OK)
      // These variables are used in png_read_filter_row_mmx_paeth() and would be
      //   local variables if not for gcc-inline-assembly addressing limitations
      //   (some apparently related to ELF format, others to CPU type).
@@ -619,18 +623,19 @@ static PNG_CONST ull _amask4_2_2  __attribute__((used, aligned(8))) = 0x00000000
 #    define RESTORE_r11_r12_r13
 #    define _CLOBBER_r11_r12_r13   // not using regs => not clobbering
 #    define CLOBBER_r11_r12_r13
+#  endif // PNG_THREAD_UNSAFE_OK
 #    define LOAD_GOT_rbp
 #    define RESTORE_rbp
 #endif
 
-#ifdef __x86_64__
+#if defined(__x86_64__)
 #  define SAVE_ebp
 #  define RESTORE_ebp
 #  define _CLOBBER_ebp         ,"%ebp"
 #  define CLOBBER_ebp          "%ebp"
 #  define SAVE_FullLength      "movl %%eax, %%r15d  \n\t"
 #  define RESTORE_FullLength   "movl %%r15d, "     // may go into eax or ecx
-#  ifdef PNG_CLOBBER_x86_64_REGS_SUPPORTED  // works as of gcc 3.4.3 ...
+#  if defined(PNG_CLOBBER_x86_64_REGS_SUPPORTED)  // works as of gcc 3.4.3 ...
 #    define SAVE_r15
 #    define RESTORE_r15
 #    define _CLOBBER_r15       ,"%r15"
@@ -690,11 +695,10 @@ static PNG_CONST ull _amask4_2_2  __attribute__((used, aligned(8))) = 0x00000000
 #  define CLOB_COLON_ebx_ebp_r1X    : // clobbering ebp OR ebx OR r11_r12_r13
 #endif
 
-#endif // PNG_THREAD_UNSAFE_OK
 #endif // PNG_HAVE_MMX_READ_FILTER_ROW
 
-#ifdef __PIC__  // macros to save, restore index to Global Offset Table
+#if defined(__PIC__)  // macros to save, restore index to Global Offset Table
-#  ifdef __x86_64__
+#  if defined(__x86_64__)
 #    define SAVE_GOT_ebx     "pushq %%rbx \n\t"
 #    define RESTORE_GOT_ebx  "popq  %%rbx \n\t"
 #  else
@@ -747,7 +751,7 @@ png_mmx_support(void)
 #if defined(PNG_MMX_CODE_SUPPORTED)
     int result;
     __asm__ __volatile__ (
-#ifdef __x86_64__
+#if defined(__x86_64__)
         "pushq %%rbx          \n\t"  // rbx gets clobbered by CPUID instruction
         "pushq %%rcx          \n\t"  // so does rcx...
         "pushq %%rdx          \n\t"  // ...and rdx (but rcx & rdx safe on Linux)
@@ -799,7 +803,7 @@ png_mmx_support(void)
     "0:                       \n\t"  // .NOT_SUPPORTED: target label for jump instructions
         "movl $0, %%eax       \n\t"  // set return value to 0
     "1:                       \n\t"  // .RETURN: target label for jump instructions
-#ifdef __x86_64__
+#if defined(__x86_64__)
         "popq %%rdx           \n\t"  // restore rdx
         "popq %%rcx           \n\t"  // restore rcx
         "popq %%rbx           \n\t"  // restore rbx
@@ -889,7 +893,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
             png_bytep srcptr;
             png_bytep dstptr;
 
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
             if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
                 /* && _mmx_supported */ )
@@ -1017,7 +1021,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                     "2" (len),         // ecx
                     "1" (mask)         // edx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                   : "%mm0", "%mm1", "%mm2", "%mm3"  // clobber list
                   , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -1234,7 +1238,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
             png_bytep srcptr;
             png_bytep dstptr;
 
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
             if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
                 /* && _mmx_supported */ )
@@ -1326,7 +1330,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                     "2" (len),         // ecx
                     "1" (mask)         // edx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                   : "%mm0", "%mm4", "%mm6", "%mm7"  // clobber list
 #endif
                );
@@ -1377,7 +1381,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
             png_bytep srcptr;
             png_bytep dstptr;
 
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
             if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
                 /* && _mmx_supported */ )
@@ -1483,7 +1487,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                     "3" (srcptr),      // esi
                     "4" (dstptr)       // edi
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                   : "%mm0", "%mm1", "%mm4"          // clobber list
                   , "%mm5", "%mm6", "%mm7"
 #endif
@@ -1534,7 +1538,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
             png_bytep srcptr;
             png_bytep dstptr;
 
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
             if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
                 /* && _mmx_supported */ )
@@ -1655,7 +1659,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                     "2" (len),         // ecx
                     "1" (mask)         // edx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                   : "%mm0", "%mm1", "%mm2"          // clobber list
                   , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -1706,7 +1710,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
             png_bytep srcptr;
             png_bytep dstptr;
 
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
             if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
                 /* && _mmx_supported */ )
@@ -1851,7 +1855,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
                     "2" (len),         // ecx
                     "1" (mask)         // edx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                   : "%mm0", "%mm1", "%mm2", "%mm3"  // clobber list
                   , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -2241,13 +2245,13 @@ png_do_read_interlace(png_structp png_ptr)
                         : "1" (sptr),          // esi      // input regs
                           "2" (dp),            // edi
                           "0" (width),         // ecx
-#ifdef PNG_x86_64_USE_GOTPCREL                 // formerly _const4:
+#if defined(PNG_x86_64_USE_GOTPCREL)                // formerly _const4:
                           "3" (&_c64._amask5_3_0)  // (0x0000000000FFFFFFLL)
 #else
                           "3" (&_amask5_3_0)       // (0x0000000000FFFFFFLL)
 #endif
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                         : "%mm0", "%mm1", "%mm2"       // clobber list
                         , "%mm3", "%mm4"
 #endif
@@ -2291,13 +2295,13 @@ png_do_read_interlace(png_structp png_ptr)
                         : "1" (sptr),          // esi      // input regs
                           "2" (dp),            // edi
                           "0" (width),         // ecx
-#ifdef PNG_x86_64_USE_GOTPCREL                 // formerly _const4:
+#if defined(PNG_x86_64_USE_GOTPCREL)                // formerly _const4:
                           "3" (&_c64._amask5_3_0)  // (0x0000000000FFFFFFLL)
 #else
                           "3" (&_amask5_3_0)       // (0x0000000000FFFFFFLL)
 #endif
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
                         : "%mm0", "%mm1", "%mm2"       // clobber list
 #endif
                      );
@@ -2354,7 +2358,7 @@ png_do_read_interlace(png_structp png_ptr)
                            : "1" (sptr),          // esi      // input regs
                              "2" (dp),            // edi
                              "0" (width_mmx),     // ecx
-#ifdef PNG_x86_64_USE_GOTPCREL                 // formerly _const4 and _const6:
+#if defined(PNG_x86_64_USE_GOTPCREL)                // formerly _const4 and _const6:
                              "3" (&_c64._amask5_3_0), // (0x0000000000FFFFFFLL)
                              "4" (&_c64._amask7_1_0)  // (0x00000000000000FFLL)
 #else
@@ -2362,7 +2366,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "4" (&_amask7_1_0)       // (0x00000000000000FFLL)
 #endif
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1"               // clobber list
                            , "%mm2", "%mm3"
 #endif
@@ -2435,7 +2439,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1", "%mm2"       // clobber list
                            , "%mm3", "%mm4"
 #endif
@@ -2509,7 +2513,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1"               // clobber list
 #endif
                         );
@@ -2563,7 +2567,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1"               // clobber list
 #endif
                         );
@@ -2625,7 +2629,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1"               // clobber list
 #endif
                         );
@@ -2682,7 +2686,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1"               // clobber list
 #endif
                         );
@@ -2735,7 +2739,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0"                       // clobber list
 #endif
                         );
@@ -2802,7 +2806,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1"               // clobber list
 #endif
                         );
@@ -2860,7 +2864,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1"               // clobber list
 #endif
                         );
@@ -2916,7 +2920,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width_mmx)  // ecx
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0", "%mm1"               // clobber list
 #endif
                         );
@@ -2979,7 +2983,7 @@ png_do_read_interlace(png_structp png_ptr)
                           "2" (dp),        // edi
                           "0" (width)      // ecx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                         : "%mm0"                       // clobber list
 #endif
                      );
@@ -3018,7 +3022,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width)      // ecx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0"                       // clobber list
 #endif
                         );
@@ -3054,7 +3058,7 @@ png_do_read_interlace(png_structp png_ptr)
                              "2" (dp),        // edi
                              "0" (width)      // ecx
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
                            : "%mm0"                       // clobber list
 #endif
                         );
@@ -3156,7 +3160,7 @@ png_do_read_interlace(png_structp png_ptr)
                      png_memcpy(v, sptr, 4);
                      for (j = 0; j < png_pass_inc[pass]; j++)
                      {
-#ifdef PNG_DEBUG
+#if defined(PNG_DEBUG)
                         if (dp < row || dp+3 > row+png_ptr->row_buf_size)
                         {
                            printf("dp out of bounds: row=%d, dp=%d, rp=%d\n",
@@ -3236,7 +3240,6 @@ png_do_read_interlace(png_structp png_ptr)
 #if defined(PNG_HAVE_MMX_READ_FILTER_ROW)
 #if defined(PNG_MMX_CODE_SUPPORTED)
 
-#ifdef PNG_THREAD_UNSAFE_OK
 //===========================================================================//
 //                                                                           //
 //           P N G _ R E A D _ F I L T E R _ R O W _ M M X _ A V G           //
@@ -3261,7 +3264,6 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
    bpp = (row_info->pixel_depth + 7) >> 3;  // calc number of bytes per pixel
    FullLength = row_info->rowbytes;         // number of bytes to filter
 
-//printf("GRR DEBUG: avgtop start\n"); fflush(stdout);
    __asm__ __volatile__ (
       SAVE_GOT_ebx
       SAVE_r15
@@ -3322,7 +3324,7 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
       "subl %%eax, %%ecx           \n\t" // drop over bytes from original length
 //out "movl %%ecx, MMXLength       \n\t"
       "movl %%ebp, %%edi           \n\t" // ebp = diff, but no reg constraint(?)
-      RESTORE_ebp
+      RESTORE_ebp                        //  (could swap ebp and ecx functions)
       RESTORE_r15
       RESTORE_GOT_ebx
 
@@ -3341,14 +3343,12 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
         _CLOBBER_ebp
         _CLOBBER_GOT_ebx
    );
-//printf("GRR DEBUG: avgtop end\n"); fflush(stdout);
 
    // now do the math for the rest of the row
    switch (bpp)
    {
       case 3:
       {
-//printf("GRR DEBUG: avg3 start\n"); fflush(stdout);
 //       _ShiftBpp = 24;    // == 3 * 8
 //       _ShiftRem = 40;    // == 64 - 24
 
@@ -3454,12 +3454,11 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2", "%mm3"   // clobber list
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
          );
-//printf("GRR DEBUG: avg3 end\n"); fflush(stdout);
       }
       break;  // end 3 bpp
 
@@ -3552,7 +3551,7 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2", "%mm3"   // clobber list
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -3648,7 +3647,7 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2", "%mm3"   // clobber list
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -3787,7 +3786,7 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2", "%mm3"   // clobber list
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -3903,7 +3902,7 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2"           // clobber list
             , "%mm3", "%mm4", "%mm5"
 #endif
@@ -3913,7 +3912,7 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
 
       default:                // bpp != 1,2,3,4,6,8:  doesn't exist
       {
-#ifdef PNG_DEBUG
+#if defined(PNG_DEBUG)
          // ERROR:  SHOULD NEVER BE REACHED
          png_debug(1,
           "Internal libpng logic error (GCC png_read_filter_row_mmx_avg())\n");
@@ -3923,7 +3922,6 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
 
    } // end switch (bpp)
 
-//printf("GRR DEBUG: avgbot start\n"); fflush(stdout);
    __asm__ __volatile__ (
       // MMX acceleration complete; now do clean-up
       // check if any remaining bytes left to decode
@@ -3980,14 +3978,13 @@ png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
         CLOB_COMMA_ebx_ebp
         CLOBBER_ebp
    );
-//printf("GRR DEBUG: avgbot end\n"); fflush(stdout);
 
 } /* end png_read_filter_row_mmx_avg() */
-#endif // PNG_THREAD_UNSAFE_OK
 
 
 
-#ifdef PNG_THREAD_UNSAFE_OK
+#if defined(PNG_x86_64_USE_GOTPCREL) || defined(PNG_THREAD_UNSAFE_OK)
+
 //===========================================================================//
 //                                                                           //
 //         P N G _ R E A D _ F I L T E R _ R O W _ M M X _ P A E T H         //
@@ -4012,7 +4009,6 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
    bpp = (row_info->pixel_depth + 7) >> 3;  // calc number of bytes per pixel
    FullLength = row_info->rowbytes;         // number of bytes to filter
 
-//printf("GRR DEBUG: paethtop start\n"); fflush(stdout);
    __asm__ __volatile__ (
       SAVE_GOT_ebx
       SAVE_r15
@@ -4131,7 +4127,7 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
       "subl %%eax, %%ecx           \n\t" // drop over bytes from original length
 //out "movl %%ecx, MMXLength       \n\t"
       "movl %%ebp, %%edi           \n\t" // ebp = diff, but no reg constraint(?)
-      RESTORE_ebp
+      RESTORE_ebp                        //  (could swap ebp and ecx functions)
       RESTORE_r15
       RESTORE_GOT_ebx
 
@@ -4151,14 +4147,12 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
         _CLOBBER_ebp
         _CLOBBER_GOT_ebx
    );
-//printf("GRR DEBUG: paethtop end\n"); fflush(stdout);
 
    // now do the math for the rest of the row
    switch (bpp)
    {
       case 3:
       {
-//printf("GRR DEBUG: paeth3 start\n"); fflush(stdout);
 //       _ShiftBpp = 24;    // == bpp * 8
 //       _ShiftRem = 40;    // == 64 - _ShiftBpp
 
@@ -4373,12 +4367,11 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2", "%mm3"   // clobber list
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
          );
-//printf("GRR DEBUG: paeth3 end\n"); fflush(stdout);
       }
       break;  // end 3 bpp
 
@@ -4538,7 +4531,7 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2", "%mm3"   // clobber list
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -4687,7 +4680,7 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2", "%mm3"   // clobber list
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -4836,7 +4829,7 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
               "2" (diff),      // ecx
               "3" (MMXLength)  // eax
 
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             : "%mm0", "%mm1", "%mm2", "%mm3"   // clobber list
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -4966,7 +4959,6 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
 
    } // end switch (bpp)
 
-//printf("GRR DEBUG: paethend start\n"); fflush(stdout);
    __asm__ __volatile__ (
       // MMX acceleration complete; now do clean-up
       // check if any remaining bytes left to decode
@@ -5085,15 +5077,14 @@ png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
         CLOB_COMMA_ebX_r1X
         CLOBBER_r11_r12_r13
    );
-//printf("GRR DEBUG: paethend end\n"); fflush(stdout);
 
 } /* end png_read_filter_row_mmx_paeth() */
-#endif // PNG_THREAD_UNSAFE_OK
+
+#endif // PNG_x86_64_USE_GOTPCREL || PNG_THREAD_UNSAFE_OK
 
 
 
 
-#ifdef PNG_THREAD_UNSAFE_OK
 //===========================================================================//
 //                                                                           //
 //           P N G _ R E A D _ F I L T E R _ R O W _ M M X _ S U B           //
@@ -5117,7 +5108,6 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
    FullLength = row_info->rowbytes - bpp;   // number of bytes to filter
      // (why do we subtract off bpp?  not so in avg or paeth...)
 
-//printf("GRR DEBUG: subtop start\n"); fflush(stdout);
    __asm__ __volatile__ (
       SAVE_r15
       SAVE_ebp
@@ -5166,14 +5156,12 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
         _CLOBBER_r15
         _CLOBBER_ebp
    );
-//printf("GRR DEBUG: subtop end\n"); fflush(stdout);
 
    // now do the math for the rest of the row
    switch (bpp)
    {
       case 3:
       {
-//printf("GRR DEBUG: sub3 start\n"); fflush(stdout);
 //       _ShiftBpp = 24;       // == 3 * 8
 //       _ShiftRem  = 40;      // == 64 - 24
 
@@ -5230,11 +5218,10 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
               "3" (MMXLength)         // eax
 
             : "%esi"                            // clobber list
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             , "%mm0", "%mm1", "%mm6", "%mm7"
 #endif
          );
-//printf("GRR DEBUG: sub3 end\n"); fflush(stdout);
       }
       break;  // end 3 bpp
 
@@ -5282,7 +5269,7 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
               "3" (MMXLength)         // eax
 
             : "%esi"                            // clobber list
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             , "%mm0", "%mm1"
 #endif
          );
@@ -5332,7 +5319,7 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
               "3" (MMXLength)         // eax
 
             : "%esi"                            // clobber list
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             , "%mm0", "%mm1"
 #endif
          );
@@ -5441,7 +5428,7 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
               "3" (MMXLength)         // eax
 
             : "%esi"                            // clobber list
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             , "%mm0", "%mm1", "%mm5", "%mm6", "%mm7"
 #endif
          );
@@ -5526,7 +5513,7 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
 
             : "%esi"                            // clobber list
               _CLOBBER_ebp
-#ifdef CLOBBER_MMX_REGS_SUPPORTED
+#if defined(CLOBBER_MMX_REGS_SUPPORTED)
             , "%mm0", "%mm1", "%mm2", "%mm3"
             , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -5536,7 +5523,7 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
 
       default:                // bpp != 1,2,3,4,6,8:  doesn't exist
       {
-#ifdef PNG_DEBUG
+#if defined(PNG_DEBUG)
          // ERROR:  SHOULD NEVER BE REACHED
          png_debug(1,
           "Internal libpng logic error (GCC png_read_filter_row_mmx_sub())\n");
@@ -5546,7 +5533,6 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
 
    } // end switch (bpp)
 
-//printf("GRR DEBUG: subend start\n"); fflush(stdout);
    __asm__ __volatile__ (
 //pre "movl MMXLength, %%eax        \n\t"
 //pre "movl row, %%edi              \n\t"
@@ -5581,10 +5567,8 @@ png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
 
       : "%esi"                            // clobber list
    );
-//printf("GRR DEBUG: subend end\n"); fflush(stdout);
 
 } // end of png_read_filter_row_mmx_sub()
-#endif // PNG_THREAD_UNSAFE_OK
 
 
 
@@ -5724,7 +5708,7 @@ png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row,
       : "%eax", "%ecx"            // clobber list (no input regs!)
         _CLOBBER_GOT_ebx
 
-#ifdef PNG_CLOBBER_MMX_REGS_SUPPORTED
+#if defined(PNG_CLOBBER_MMX_REGS_SUPPORTED)
       , "%mm0", "%mm1", "%mm2", "%mm3"
       , "%mm4", "%mm5", "%mm6", "%mm7"
 #endif
@@ -5750,17 +5734,11 @@ void /* PRIVATE */
 png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
    row, png_bytep prev_row, int filter)
 {
-#ifdef PNG_DEBUG
+#if defined(PNG_DEBUG)
    char filnm[10];
 #endif
 
 #if defined(PNG_MMX_CODE_SUPPORTED)
-/* GRR:  these are superseded by png_ptr->asm_flags: */
-#define UseMMX_sub    1   // GRR:  converted 20000730
-#define UseMMX_up     1   // GRR:  converted 20000729
-#define UseMMX_avg    1   // GRR:  converted 20000828 (+ 16-bit bugfix 20000916)
-#define UseMMX_paeth  1   // GRR:  converted 20000828
-
    if (_mmx_supported == 2) {
 #if !defined(PNG_1_0_X)
        /* this should have happened in png_init_mmx_flags() already */
@@ -5770,48 +5748,79 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
    }
 #endif /* PNG_MMX_CODE_SUPPORTED */
 
-#ifdef PNG_DEBUG
+#if defined(PNG_DEBUG)
    png_debug(1, "in png_read_filter_row (pnggccrd.c)\n");
    switch (filter)
    {
-      case 0: png_snprintf(filnm, 10, "none");
+      case 0:
+         png_snprintf(filnm, 10, "none");
          break;
-      case 1: png_snprintf(filnm, 10, "sub-%s",
+
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+      case 1:
+         png_snprintf(filnm, 10, "sub-%s",
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
-        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" :
+           ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) &&
+            (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
+            (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
+#else
+           _mmx_supported
 #endif
+           ? "MMX" :
 #endif
              "x86");
          break;
-      case 2: png_snprintf(filnm, 10, "up-%s",
+
-#ifdef PNG_MMX_CODE_SUPPORTED
+      case 2:
+         png_snprintf(filnm, 10, "up-%s",
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
-        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" :
+           ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) &&
+            (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
+            (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
+#else
+           _mmx_supported
 #endif
+           ? "MMX" :
 #endif
              "x86");
          break;
-      case 3: png_snprintf(filnm, 10, "avg-%s",
+
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+      case 3:
+         png_snprintf(filnm, 10, "avg-%s",
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
-        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" :
+           ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) &&
+            (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
+            (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
+#else
+           _mmx_supported
 #endif
+           ? "MMX" :
 #endif
              "x86");
          break;
-      case 4: png_snprintf(filnm, 10, "Paeth-%s",
+
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+      case 4:
+         png_snprintf(filnm, 10, "Paeth-%s",
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
-        (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":
+           ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) &&
+            (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
+            (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
+#else
+           _mmx_supported
 #endif
+           ? "MMX" :
 #endif
              "x86");
          break;
-      default: png_snprintf(filnm, 10, "unknw");
+
+      default:
+         png_snprintf(filnm, 10, "unknown");
          break;
    }
-   png_debug2(0, "row_number=%5ld, %5s, ", png_ptr->row_number, filnm);
+   png_debug2(0, "row_number=%5ld, %10s, ", png_ptr->row_number, filnm);
    png_debug1(0, "row=0x%08lx, ", (unsigned long)row);
    png_debug2(0, "pixdepth=%2d, bytes=%d, ", (int)row_info->pixel_depth,
       (int)((row_info->pixel_depth + 7) >> 3));
@@ -5824,7 +5833,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
          break;
 
       case PNG_FILTER_VALUE_SUB:
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
          if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) &&
              (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
@@ -5881,7 +5890,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
          break;
 
       case PNG_FILTER_VALUE_AVG:
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+#if defined(PNG_MMX_CODE_SUPPORTED)
 #if !defined(PNG_1_0_X)
          if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) &&
              (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
@@ -5919,7 +5928,8 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
          break;
 
       case PNG_FILTER_VALUE_PAETH:
-#if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
+#if defined(PNG_MMX_CODE_SUPPORTED)
+#if defined(PNG_x86_64_USE_GOTPCREL) || defined(PNG_THREAD_UNSAFE_OK)
 #if !defined(PNG_1_0_X)
          if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) &&
              (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
@@ -5931,6 +5941,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
             png_read_filter_row_mmx_paeth(row_info, row, prev_row);
          }
          else
+#endif /* PNG_x86_64_USE_GOTPCREL || PNG_THREAD_UNSAFE_OK */
 #endif /* PNG_MMX_CODE_SUPPORTED */
          {
             png_uint_32 i;
@@ -5958,7 +5969,7 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
                p = b - c;
                pc = a - c;
 
-#ifdef PNG_USE_ABS
+#if defined(PNG_USE_ABS)
                pa = abs(p);
                pb = abs(pc);
                pc = abs(p + pc);
@@ -5995,4 +6006,4 @@ png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
 #endif /* PNG_HAVE_MMX_READ_FILTER_ROW */
 
 
-#endif /* PNG_USE_PNGGCCRD */
+#endif /* PNG_ASSEMBLER_CODE_SUPPORTED && PNG_USE_PNGGCCRD */

pngpread.c

@@ -1,7 +1,7 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

pngread.c

@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

pngrtran.c

@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

pngrutil.c

@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

pngtest.c

@@ -1553,4 +1553,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_19beta15 your_png_h_is_not_version_1_2_19beta15;
+typedef version_1_2_19beta16 your_png_h_is_not_version_1_2_19beta16;

pngvcrd.c

@@ -3,7 +3,7 @@
  *
  * For Intel x86 CPU and Microsoft Visual C++ compiler
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * Copyright (c) 1998, Intel Corporation

pngwutil.c

@@ -1,7 +1,7 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.2.19 June 17, 2007
+ * Last changed in libpng 1.2.19 June 19, 2007
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2007 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

scripts/CMakeLists.txt

@@ -179,7 +179,7 @@ configure_file(${PNG_SOURCE_DIR}/scripts/libpng-config.in
 
 # SET UP LINKS
 set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#    VERSION 0.${PNGLIB_RELEASE}.1.2.19beta15
+#    VERSION 0.${PNGLIB_RELEASE}.1.2.19beta16
      VERSION 0.${PNGLIB_RELEASE}.0
      SOVERSION 0
      CLEAN_DIRECT_OUTPUT 1)

scripts/libpng-config-head.in

@@ -8,7 +8,7 @@
 
 # Modeled after libxml-config.
 
-version=1.2.19beta15
+version=1.2.19beta16
 prefix=""
 libdir=""
 libs=""

scripts/libpng.pc-configure.in

@@ -5,6 +5,6 @@ includedir=@includedir@/libpng12
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.2.19beta15
+Version: 1.2.19beta16
 Libs: -L${libdir} -lpng12
 Cflags: -I${includedir} @LIBPNG_NO_MMX@

scripts/libpng.pc.in

@@ -5,6 +5,6 @@ includedir=@includedir@/libpng12
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.2.19beta15
+Version: 1.2.19beta16
 Libs: -L${libdir} -lpng12
 Cflags: -I${includedir}

scripts/makefile.32sunu

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.64sunu

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.aix

@@ -20,7 +20,7 @@ LN_SF = ln -f -s
 
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 prefix=/usr/local

scripts/makefile.beos

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.cygwin

@@ -80,7 +80,7 @@ CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
 LIBNAME = libpng12
 PNGMAJ = 0
 CYGDLL = 12
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=cygpng$(CYGDLL).dll

scripts/makefile.darwin

@@ -19,7 +19,7 @@ ZLIBINC=../zlib
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.dec

@@ -5,7 +5,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng12
 

scripts/makefile.elf

@@ -12,7 +12,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.gcmmx

@@ -16,7 +16,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.hp64

@@ -18,7 +18,7 @@ ZLIBINC=/opt/zlib/include
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.hpgcc

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.hpux

@@ -18,7 +18,7 @@ ZLIBINC=/opt/zlib/include
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.linux

@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.mingw

@@ -81,7 +81,7 @@ CFLAGS= $(strip $(MINGW_CCFLAGS) $(addprefix -I,$(ZLIBINC)) \
 LIBNAME = libpng12
 PNGMAJ = 0
 MINGDLL = 12
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 SHAREDLIB=libpng$(MINGDLL).dll

scripts/makefile.ne12bsd

@@ -14,7 +14,7 @@ INCSDIR=${LOCALBASE}/include/libpng12
 
 LIB=	png12
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.2.19beta15
+SHLIB_MINOR=	1.2.19beta16
 SRCS=	pnggccrd.c png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 		pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 		pngwtran.c pngmem.c pngerror.c pngpread.c

scripts/makefile.netbsd

@@ -14,7 +14,7 @@ INCSDIR=${LOCALBASE}/include/libpng
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.2.19beta15
+SHLIB_MINOR=	1.2.19beta16
 SRCS=	pnggccrd.c png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 		pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 		pngwtran.c pngmem.c pngerror.c pngpread.c

scripts/makefile.nommx

@@ -7,7 +7,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.openbsd

@@ -8,7 +8,7 @@ LIBDIR=	${PREFIX}/lib
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.2.19beta15
+SHLIB_MINOR=	1.2.19beta16
 
 LIB=	png
 SRCS=	png.c pngerror.c pnggccrd.c pngget.c pngmem.c pngpread.c \

scripts/makefile.sco

@@ -9,7 +9,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.sggcc

@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.sgi

@@ -6,7 +6,7 @@
 # Library name:
 LIBNAME=libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.so9

@@ -8,7 +8,7 @@
 
 # Library name:
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 LIBNAME = libpng12
 

scripts/makefile.solaris

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/makefile.solaris-x86

@@ -8,7 +8,7 @@
 # Library name:
 LIBNAME = libpng12
 PNGMAJ = 0
-PNGMIN = 1.2.19beta15
+PNGMIN = 1.2.19beta16
 PNGVER = $(PNGMAJ).$(PNGMIN)
 
 # Shared library names:

scripts/pngos2.def

@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.2.19beta15
+; Version 1.2.19beta16
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"

scripts/pngw32.def

@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.2.19beta15
+;Version 1.2.19beta16
   png_build_grayscale_palette  @1
   png_check_sig        @2
   png_chunk_error      @3