icnsutil and Xcode's automatic iconset -> icns conversion recompress their
input files, even if they were already in the correct format. This would be
fine, except for that they do an extremely poor job of compressing to png and
produce files twice as large as can be achieved with better compressors. This
tool simply packs a .iconset into a .icns with no recompression (and not much
in the way of validation, so make sure the end result works).
Compile with make icnspack. Run with icnspack input.iconset output.icns.
Copyright (c) 2014, Thomas Goyne tgoyne@gmail.com
Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.