Latest changes:
 ~~~~~~~~~~~~~~
Reintroducing support for the WarpPNG.datatype v45.15+ again.
This is aimed at the PPC card owners for faster PNG decoding.
If you want to use the WarpPNG.datatype with a PPC then please
uninstall the png.datatype and the PNG file from Gunther Nikl.
All other users shouldn't do this, because the png.datatype is
still faster than WarpPNG on 68k CPUs and thus it's preferred.

The color reduction of truecolor icons into the 255 colors and
the transparency mask of the OS 3.5 format has been improved a
little more by adding a simple colorscan over the whole image.

The default Workbench preferences have been changed for OS 3.1
systems. The icons have no frame anymore and the frame size is
set to just one pixel (for less space used by icon alignment).
The type of allocated icon memory can be any public (Fast)Mem.
Of course, these settings are overridden by IPrefs on OS 3.5+.

 Description:
 ~~~~~~~~~~~
This is a patch for the icon.library written in optimized ASM
code with IconBeFast 2 already built in. Although this version
of the icon.library has not been completely rewritten yet and
has only a few new features it works much faster now and it's
also a lot smaller than the original library of Amiga OS 3.9.

This library can now display the 32 bit ARGB icons of OS4 on
any AGA screen with the normal 8 bit color mapping of OS 3.5+.
This new feature needs zlib-library 3.2 from Aminet to work.
WB:icon->info will convert these icons into the OS 3.5 format!
The old style planar images of the OS4 icons are replaced now
by the smaller internal default images since many were broken.

Added support for displaying Dual-PNG icons on any AGA screen.
This new feature needs png.datatype v44.6 or WarpPNG.datatype
v45.15+ (for PPCs) installed. An automatical configuration for
the PNG datatype lets it run through two passes with different
background colors to make the alpha channel information usable
for transparency. The new datatype descriptor "infoPNG" will
be copied into the DEVS:datatypes directory for the PNG icons.

The pngalpha.library will now be used optional by the IconLib
for a few icons with a predefined internal background color if
it is installed and as long as it was not disabled by the key-
word "NoAlpha" in the new config file ENVARC:IconLib46.prefs.

When you're fixing the position of PNG-icons with snapshot you
will see a requester asking if you would like to convert the
icons into the OS 3.5 format. This format has the advantage of
getting small files and a much faster icon loading as for PNG.
There's hardly any quality loss visible in truecolor modes.
The viewmodes for PNG drawer icons are now always set to their
defaults: displaying only real icons and NO text-mode listings.

The library has a color reduction routine for PNG and OS4 ARGB
icons which is based on 15 bits for the first 100 colors now.
The comparison is done with less bits step by step when more
colors are required. The resulting quality is close to HiColor.

The new generated icon.library 46.4 will automatically detect
if the PowerIcons patch has been installed on your system. You
should make use of it when your Workbench is in truecolor mode.
The new PowerIcons patch will display all your icons perfectly.
I made a simple patch for the PowerIcons program disabling its
PNG icon detection in order to pass on the PNG decoding to the
icon.library. The PowerIcons program is still very usefull for
drawing the images then directly in high quality to the screen.
With this little trick it's even possible to display Dual-PNG.
However, the PNG decoding by using datatypes is very slow now.
But you can always convert truecolor icons into OS 3.5 icons
for a much faster loading. Internal PNG decoding may come next? 

This icon.library can also be used without conflicts on AfA_OS
since release 4.7 (but not with the PowerIcons patch together).
Please, remember that AfA has its own Icon_Lib.exe and will do
most of the icon drawing itself if loaded from AfA_OS_LIBS:.

The library sources are supplied, except for PutIconTagList().
Only the PutIconTagList() function still has to be rewritten.
The incomplete sources can even be compiled and will work with
just one limitation: Trying to create icons shows an alert ;-)

Thanks to all users who've sent bugreports or made suggestions.

 Downloads:
 ~~~~~~~~~
 http://aminet.net/package/util/libs/IconLib_46.4 for max speed
 http://aminet.net/package/util/dtype/PNGdt44     for 68k users
 http://aminet.net/package/util/dtype/WarpPNGdt   for PPC cards
 http://aminet.net/package/util/libs/pngalpha_lib for few icons
 http://aminet.net/package/util/libs/zlib-library for OS4 icons
 http://aminet.net/package/util/wb/PowerIcons     for truecolor

 Installation:
 ~~~~~~~~~~~~
Always have a look into the supplied readme or guide files of
all additional packages and read the installation instructions.

Please, copy only the png.datatype into the Classes/Datatypes
drawer if you prefer to use another datatype for PNG pictures.
If you don't have a FPU then use the 68000 version of PNGdt 44.
The datatype for your pictures depends on the descriptor file
in DEVS:Datatypes. Use only one file of akPNG, PNG or WarpPNG!

The PowerIcons program is for gfx-card users only and should
not be used together with DOpus MagellanII. That will not work.
PowerIcons has to be run from the startup-sequence but it can
also be stopped and re-started again from a Workbench icon. It
seems that PowerIcons has a problem with some HiColor screens.

Please, just click on the supplied script to generate the new
icon.library. You will be asked to copy one of the following
icon.libraries into the LIBS: directory if the script couldn't
find it. Supported versions are 40.1, 44.543, 45.1 and 45.4.6.
Btw, the script will only work if you unpack all subdirs, too.
For a minimal system with GlowIcon support you will need only
the AmigaOS 3.1 plus SetPatch V44+ and workbench.library V44+.

 Distribution:
 ~~~~~~~~~~~~
This patch is freeware. I don't give any warranties. You are
using this patch on your own risk and you are responsible for
any damage it could cause to your system. It's not allowed to
distribute the new generated icon.library instead of the patch.


 Copyright 2007-2012:
 ~~~~~~~~~~~~~~~~~~~
   Peter Keunecke

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[unknown]                 6610   11361  58.2% -lh5- 948d Feb  3 20:00 IconLib_46.4.info
[unknown]                  134     160  83.8% -lh5- 8167 Feb  3 20:00 IconLib_46.4/DEVS/Datatypes/infoPNG
[unknown]                    8       8 100.0% -lh0- 29b7 Feb  3 20:00 IconLib_46.4/ENVARC/IconLib46.prefs
[unknown]                  365     740  49.3% -lh5- a874 Feb  3 20:00 IconLib_46.4/HowtoAddGlowing.txt
[unknown]                 3666    5009  73.2% -lh5- 6764 Feb  3 20:00 IconLib_46.4/HowtoAddGlowing.txt.info
[unknown]                 2936    6577  44.6% -lh5- c4b8 Feb  3 20:00 IconLib_46.4/IconLib_46.4.readme
[unknown]                 3666    5009  73.2% -lh5- 9455 Feb  3 20:00 IconLib_46.4/IconLib_46.4.readme.info
[unknown]                64700  446491  14.5% -lh5- 0509 Feb  3 20:00 IconLib_46.4/IconLib_46.4.source
[unknown]                 3666    5009  73.2% -lh5- 5223 Feb  3 20:00 IconLib_46.4/IconLib_46.4.source.info
[unknown]                 1024    2630  38.9% -lh5- 5806 Feb  3 20:00 IconLib_46.4/MakeLibrary.script
[unknown]                 5024    6265  80.2% -lh5- fb0c Feb  3 20:00 IconLib_46.4/MakeLibrary.script.info
[unknown]                10201   16224  62.9% -lh5- 5536 Feb  3 20:00 IconLib_46.4/md5sum
[unknown]                   52      52 100.0% -lh0- 1f7c Feb  3 20:00 IconLib_46.4/md5sums/40.1.md5
[unknown]                   52      52 100.0% -lh0- 4e72 Feb  3 20:00 IconLib_46.4/md5sums/44.543.md5
[unknown]                   52      52 100.0% -lh0- 3caa Feb  3 20:00 IconLib_46.4/md5sums/45.1.md5
[unknown]                   52      52 100.0% -lh0- 4bc3 Feb  3 20:00 IconLib_46.4/md5sums/45.4.6.md5
[unknown]                   52      52 100.0% -lh0- 8b9b Feb  3 20:00 IconLib_46.4/md5sums/46.4.220.md5
[unknown]                   52      52 100.0% -lh0- a270 Feb  3 20:00 IconLib_46.4/md5sums/46.4.225.md5
[unknown]                   47      47 100.0% -lh0- 505b Feb  3 20:00 IconLib_46.4/md5sums/PowerIcons007.md5
[unknown]                   47      47 100.0% -lh0- 26c7 Feb  3 20:00 IconLib_46.4/md5sums/PowerIcons008.md5
[unknown]                   47      47 100.0% -lh0- feb8 Feb  3 20:00 IconLib_46.4/md5sums/PowerIcons106.md5
[unknown]                  341     384  88.8% -lh5- 118d Feb  3 20:00 IconLib_46.4/MinStack
[unknown]                17205   26372  65.2% -lh5- 2c99 Feb  3 20:00 IconLib_46.4/patches/40.1-46.4.225
[unknown]                17111   26372  64.9% -lh5- 216c Feb  3 20:00 IconLib_46.4/patches/44.543-46.4.225
[unknown]                17107   26368  64.9% -lh5- f7dd Feb  3 20:00 IconLib_46.4/patches/45.1-46.4.225
[unknown]                17088   26356  64.8% -lh5- e78a Feb  3 20:00 IconLib_46.4/patches/45.4.6-46.4.225
[unknown]                 1758    2112  83.2% -lh5- c901 Feb  3 20:00 IconLib_46.4/patches/46.4.220-46.4.225
[unknown]                32416   53080  61.1% -lh5- 2fea Feb  3 20:00 IconLib_46.4/patches/PowerIcons_0.07-0.08
[unknown]                32419   53088  61.1% -lh5- dd1c Feb  3 20:00 IconLib_46.4/patches/PowerIcons_1.06-0.08
[unknown]                  449    1226  36.6% -lh5- cd30 Feb  3 20:00 IconLib_46.4/PatchingPowerIcons
[unknown]                 5023    6265  80.2% -lh5- 7d8d Feb  3 20:00 IconLib_46.4/PatchingPowerIcons.info
[unknown]                 9271   14636  63.3% -lh5- 32c7 Feb  3 20:00 IconLib_46.4/spatch
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        32 files  252641  742195  34.0%            Feb  3 19:01