Name		Name	Last commit message	Last commit date
.gitignore		.gitignore
ChangeLog.html		ChangeLog.html
LICENSE		LICENSE
Makefile		Makefile
Makefile-nolib		Makefile-nolib
README.md		README.md
adler32.c		adler32.c
arm_init.c		arm_init.c
cexcept.h		cexcept.h
compress.c		compress.c
crc32.c		crc32.c
crc32.h		crc32.h
deflate.c		deflate.c
deflate.h		deflate.h
filter_msa_intrinsics.c		filter_msa_intrinsics.c
filter_neon_intrinsics.c		filter_neon_intrinsics.c
filter_sse2_intrinsics.c		filter_sse2_intrinsics.c
filter_vsx_intrinsics.c		filter_vsx_intrinsics.c
infback.c		infback.c
inffast.c		inffast.c
inffast.h		inffast.h
inffixed.h		inffixed.h
inflate.c		inflate.c
inflate.h		inflate.h
inftrees.c		inftrees.c
inftrees.h		inftrees.h
intel_init.c		intel_init.c
mips_init.c		mips_init.c
png.c		png.c
png.h		png.h
pngconf.h		pngconf.h
pngcrush.c		pngcrush.c
pngcrush.h		pngcrush.h
pngdebug.h		pngdebug.h
pngerror.c		pngerror.c
pngget.c		pngget.c
pnginfo.h		pnginfo.h
pngmem.c		pngmem.c
pngpread.c		pngpread.c
pngpriv.h		pngpriv.h
pngread.c		pngread.c
pngrio.c		pngrio.c
pngrtran.c		pngrtran.c
pngrutil.c		pngrutil.c
pngset.c		pngset.c
pngstruct.h		pngstruct.h
pngtrans.c		pngtrans.c
pngwio.c		pngwio.c
pngwrite.c		pngwrite.c
pngwtran.c		pngwtran.c
pngwutil.c		pngwutil.c
powerpc_init.c		powerpc_init.c
trees.c		trees.c
trees.h		trees.h
uncompr.c		uncompr.c
zconf.h		zconf.h
zlib.h		zlib.h
zutil.c		zutil.c
zutil.h		zutil.h

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pngcrush

Pngcrush is a command-line optimizer for PNG (Portable Network Graphics) files.

Its main purpose is to reduce the size of the PNG IDAT datastream by trying various compression levels and PNG filter methods.

It can also be used to remove unwanted ancillary chunks, or to add certain chunks including gAMA, tRNS, iCCP, and textual chunks.

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The historical PNG crusher

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