Pure ruby library for read/write, chunk-level access to PNG files


This pure Ruby library can read and write PNG images without depending on
an external
image library, like RMagick. It tries to be memory efficient and reasonably
It supports reading and writing all PNG variants that are defined in the
with one limitation: only 8-bit color depth is supported. It supports all
interlacing and filtering options the PNG specifications allows. It can also
read and
write textual metadata from PNG files. Low-level read/write access to PNG
chunks is
also possible.
This library supports simple drawing on the image canvas and simple operations
alpha composition and cropping. Finally, it can import from and export to
RMagick for
Also, have a look at OilyPNG at http://github.com/wvanbergen/oily_png. OilyPNG
is a
drop in mixin module that implements some of the ChunkyPNG algorithms in C,
provides a massive speed boost to encoding and decoding.

Source Files
Filename Size Changed Actions
chunky_png-1.3.11.gem 0000352768 345 KB 10 months
gem2rpm.yml 0000001644 1.61 KB almost 4 years
rubygem-chunky_png.changes 0000000568 568 Bytes 7 months
rubygem-chunky_png.spec 0000002691 2.63 KB 7 months
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