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Pincrush is an open PNG optimizer implementing Apple's proprietary CgBI format.
http://howett.net/pincrush
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pincrush/
Latest commit 4efdcb0 @DHowett Update the Makefile to automatically fetch theos (git submodules!) if… … 
… it's missing. Update the README to contain compilation instructions and remove the erroneous mention of a local Theos.
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framework @ 381546a Replace framework with a git submodule pointing to the official theos…
layout/DEBIAN Whoops, this is REALLY 0.9.2.
libpng Convert libpng and zlib to statically-linked subprojects of pincrush …
zlib Convert libpng and zlib to statically-linked subprojects of pincrush …
.gitignore Remove and ignore generated binaries.
.gitmodules Replace framework with a git submodule pointing to the official theos…
Makefile Update the Makefile to automatically fetch theos (git submodules!) if…
README.md Update the Makefile to automatically fetch theos (git submodules!) if…
pincrush.c Use linux/limits.h instead of fam.h (wtf?) on Linux.
rgb.png Argh.

README.md

An attempt to replicate Apple's PNG Mangler.

Apple's PNG files are nowhere near valid (extra critical chunk with an unknown format, zlib headers discarded, premultiplied alpha). "Think different" and all that.

Prerequisites

  • a compiler
    • (for iPhone compilation) Apple's Xcode or the open toolchain

Compiling

  • iPhone (default target)

    make

  • Native (linux, OS X)

    make target=native
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