Metadata

Name
chunky_png
Version
1.2.5
Platform
ruby
Authors
Willem van Bergen
Bindir
bin
Date
2011-09-23 00:00:00 UTC
Dependencies
rake (>= 0, development)
rspec (~> 2.2, development)
Description
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 fast. It supports reading and writing all PNG variants that are defined in the specification, with one limitation: only 8-bit color depth is supported. It supports all transparency, 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 like alpha composition and cropping. Finally, it can import from and export to RMagick for interoperability. 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, which provides a massive speed boost to encoding and decoding.
Email
willem@railsdoctors.com
Extra rdoc files
README.rdoc
BENCHMARKS.rdoc
Files
.gitignore
.infinity_test
.travis.yml
.yardopts
BENCHMARKS.rdoc
Gemfile
LICENSE
README.rdoc
Rakefile
benchmarks/decoding_benchmark.rb
benchmarks/encoding_benchmark.rb
benchmarks/filesize_benchmark.rb
chunky_png.gemspec
lib/chunky_png.rb
lib/chunky_png/canvas.rb
lib/chunky_png/canvas/adam7_interlacing.rb
lib/chunky_png/canvas/data_url_exporting.rb
lib/chunky_png/canvas/data_url_importing.rb
lib/chunky_png/canvas/drawing.rb
lib/chunky_png/canvas/masking.rb
lib/chunky_png/canvas/operations.rb
lib/chunky_png/canvas/png_decoding.rb
lib/chunky_png/canvas/png_encoding.rb
lib/chunky_png/canvas/resampling.rb
lib/chunky_png/canvas/stream_exporting.rb
lib/chunky_png/canvas/stream_importing.rb
lib/chunky_png/chunk.rb
lib/chunky_png/color.rb
lib/chunky_png/compatibility.rb
lib/chunky_png/datastream.rb
lib/chunky_png/dimension.rb
lib/chunky_png/image.rb
lib/chunky_png/palette.rb
lib/chunky_png/point.rb
lib/chunky_png/rmagick.rb
lib/chunky_png/vector.rb
spec/chunky_png/canvas/adam7_interlacing_spec.rb
spec/chunky_png/canvas/data_url_exporting_spec.rb
spec/chunky_png/canvas/data_url_importing_spec.rb
spec/chunky_png/canvas/drawing_spec.rb
spec/chunky_png/canvas/masking_spec.rb
spec/chunky_png/canvas/operations_spec.rb
spec/chunky_png/canvas/png_decoding_spec.rb
spec/chunky_png/canvas/png_encoding_spec.rb
spec/chunky_png/canvas/resampling_spec.rb
spec/chunky_png/canvas/stream_exporting_spec.rb
spec/chunky_png/canvas/stream_importing_spec.rb
spec/chunky_png/canvas_spec.rb
spec/chunky_png/color_spec.rb
spec/chunky_png/datastream_spec.rb
spec/chunky_png/dimension_spec.rb
spec/chunky_png/image_spec.rb
spec/chunky_png/point_spec.rb
spec/chunky_png/rmagick_spec.rb
spec/chunky_png/vector_spec.rb
spec/chunky_png_spec.rb
spec/png_suite/background_chunks/bgai4a08.png
spec/png_suite/background_chunks/bgai4a16.png
spec/png_suite/background_chunks/bgan6a08.png
spec/png_suite/background_chunks/bgan6a16.png
spec/png_suite/background_chunks/bgbn4a08.png
spec/png_suite/background_chunks/bggn4a16.png
spec/png_suite/background_chunks/bgwn6a08.png
spec/png_suite/background_chunks/bgyn6a16.png
spec/png_suite/basic/basi0g01.png
spec/png_suite/basic/basi0g01.rgba
spec/png_suite/basic/basi0g02.png
spec/png_suite/basic/basi0g02.rgba
spec/png_suite/basic/basi0g04.png
spec/png_suite/basic/basi0g04.rgba
spec/png_suite/basic/basi0g08.png
spec/png_suite/basic/basi0g08.rgba
spec/png_suite/basic/basi0g16.png
spec/png_suite/basic/basi0g16.rgba
spec/png_suite/basic/basi2c08.png
spec/png_suite/basic/basi2c08.rgba
spec/png_suite/basic/basi2c16.png
spec/png_suite/basic/basi2c16.rgba
spec/png_suite/basic/basi3p01.png
spec/png_suite/basic/basi3p01.rgba
spec/png_suite/basic/basi3p02.png
spec/png_suite/basic/basi3p02.rgba
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spec/png_suite/basic/basi3p04.rgba
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spec/png_suite/basic/basi3p08.rgba
spec/png_suite/basic/basi4a08.png
spec/png_suite/basic/basi4a08.rgba
spec/png_suite/basic/basi4a16.png
spec/png_suite/basic/basi4a16.rgba
spec/png_suite/basic/basi6a08.png
spec/png_suite/basic/basi6a08.rgba
spec/png_suite/basic/basi6a16.png
spec/png_suite/basic/basi6a16.rgba
spec/png_suite/basic/basn0g01.png
spec/png_suite/basic/basn0g01.rgba
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spec/png_suite/basic/basn0g02.rgba
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spec/png_suite/basic/basn0g04.rgba
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spec/png_suite/basic/basn0g08.rgba
spec/png_suite/basic/basn0g16.png
spec/png_suite/basic/basn0g16.rgba
spec/png_suite/basic/basn2c08.png
spec/png_suite/basic/basn2c08.rgba
spec/png_suite/basic/basn2c16.png
spec/png_suite/basic/basn2c16.rgba
spec/png_suite/basic/basn3p01.png
spec/png_suite/basic/basn3p01.rgba
spec/png_suite/basic/basn3p02.png
spec/png_suite/basic/basn3p02.rgba
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spec/png_suite/basic/basn3p04.rgba
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spec/png_suite/basic/basn3p08.rgba
spec/png_suite/basic/basn4a08.png
spec/png_suite/basic/basn4a08.rgba
spec/png_suite/basic/basn4a16.png
spec/png_suite/basic/basn4a16.rgba
spec/png_suite/basic/basn6a08.png
spec/png_suite/basic/basn6a08.rgba
spec/png_suite/basic/basn6a16.png
spec/png_suite/basic/basn6a16.rgba
spec/png_suite/broken/x00n0g01.png
spec/png_suite/broken/xcrn0g04.png
spec/png_suite/broken/xlfn0g04.png
spec/png_suite/chunk_ordering/oi1n0g16.png
spec/png_suite/chunk_ordering/oi1n2c16.png
spec/png_suite/chunk_ordering/oi2n0g16.png
spec/png_suite/chunk_ordering/oi2n2c16.png
spec/png_suite/chunk_ordering/oi4n0g16.png
spec/png_suite/chunk_ordering/oi4n2c16.png
spec/png_suite/chunk_ordering/oi9n0g16.png
spec/png_suite/chunk_ordering/oi9n2c16.png
spec/png_suite/compression_levels/z00n2c08.png
spec/png_suite/compression_levels/z03n2c08.png
spec/png_suite/compression_levels/z06n2c08.png
spec/png_suite/compression_levels/z09n2c08.png
spec/png_suite/filtering/f00n0g08.png
spec/png_suite/filtering/f00n0g08.rgba
spec/png_suite/filtering/f00n0g08_reference.png
spec/png_suite/filtering/f00n0g08_reference.rgba
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spec/png_suite/filtering/f00n2c08.rgba
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spec/png_suite/filtering/f00n2c08_reference.rgba
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spec/png_suite/filtering/f01n0g08.rgba
spec/png_suite/filtering/f01n0g08_reference.png
spec/png_suite/filtering/f01n0g08_reference.rgba
spec/png_suite/filtering/f01n2c08.png
spec/png_suite/filtering/f01n2c08.rgba
spec/png_suite/filtering/f01n2c08_reference.png
spec/png_suite/filtering/f01n2c08_reference.rgba
spec/png_suite/filtering/f02n0g08.png
spec/png_suite/filtering/f02n0g08.rgba
spec/png_suite/filtering/f02n0g08_reference.png
spec/png_suite/filtering/f02n0g08_reference.rgba
spec/png_suite/filtering/f02n2c08.png
spec/png_suite/filtering/f02n2c08.rgba
spec/png_suite/filtering/f02n2c08_reference.png
spec/png_suite/filtering/f02n2c08_reference.rgba
spec/png_suite/filtering/f03n0g08.png
spec/png_suite/filtering/f03n0g08.rgba
spec/png_suite/filtering/f03n0g08_reference.png
spec/png_suite/filtering/f03n0g08_reference.rgba
spec/png_suite/filtering/f03n2c08.png
spec/png_suite/filtering/f03n2c08.rgba
spec/png_suite/filtering/f03n2c08_reference.png
spec/png_suite/filtering/f03n2c08_reference.rgba
spec/png_suite/filtering/f04n0g08.png
spec/png_suite/filtering/f04n0g08.rgba
spec/png_suite/filtering/f04n0g08_reference.png
spec/png_suite/filtering/f04n0g08_reference.rgba
spec/png_suite/filtering/f04n2c08.png
spec/png_suite/filtering/f04n2c08.rgba
spec/png_suite/filtering/f04n2c08_reference.png
spec/png_suite/filtering/f04n2c08_reference.rgba
spec/png_suite/gamma/g03n0g16.png
spec/png_suite/gamma/g03n2c08.png
spec/png_suite/gamma/g03n3p04.png
spec/png_suite/gamma/g04n0g16.png
spec/png_suite/gamma/g04n2c08.png
spec/png_suite/gamma/g04n3p04.png
spec/png_suite/gamma/g05n0g16.png
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spec/png_suite/gamma/g05n3p04.png
spec/png_suite/gamma/g07n0g16.png
spec/png_suite/gamma/g07n2c08.png
spec/png_suite/gamma/g07n3p04.png
spec/png_suite/gamma/g10n0g16.png
spec/png_suite/gamma/g10n2c08.png
spec/png_suite/gamma/g10n3p04.png
spec/png_suite/gamma/g25n0g16.png
spec/png_suite/gamma/g25n2c08.png
spec/png_suite/gamma/g25n3p04.png
spec/png_suite/metadata/cm0n0g04.png
spec/png_suite/metadata/cm7n0g04.png
spec/png_suite/metadata/cm9n0g04.png
spec/png_suite/other/ccwn2c08.png
spec/png_suite/other/ccwn3p08.png
spec/png_suite/other/cdfn2c08.png
spec/png_suite/other/cdhn2c08.png
spec/png_suite/other/cdsn2c08.png
spec/png_suite/other/cdun2c08.png
spec/png_suite/other/ch1n3p04.png
spec/png_suite/other/ch2n3p08.png
spec/png_suite/other/cs3n2c16.png
spec/png_suite/other/cs3n3p08.png
spec/png_suite/other/cs5n2c08.png
spec/png_suite/other/cs5n3p08.png
spec/png_suite/other/cs8n2c08.png
spec/png_suite/other/cs8n3p08.png
spec/png_suite/other/ct0n0g04.png
spec/png_suite/other/ct1n0g04.png
spec/png_suite/other/ctzn0g04.png
spec/png_suite/other/pp0n2c16.png
spec/png_suite/other/pp0n6a08.png
spec/png_suite/other/ps1n0g08.png
spec/png_suite/other/ps1n2c16.png
spec/png_suite/other/ps2n0g08.png
spec/png_suite/other/ps2n2c16.png
spec/png_suite/sizes/s01i3p01.png
spec/png_suite/sizes/s01n3p01.png
spec/png_suite/sizes/s02i3p01.png
spec/png_suite/sizes/s02n3p01.png
spec/png_suite/sizes/s03i3p01.png
spec/png_suite/sizes/s03n3p01.png
spec/png_suite/sizes/s04i3p01.png
spec/png_suite/sizes/s04n3p01.png
spec/png_suite/sizes/s05i3p02.png
spec/png_suite/sizes/s05n3p02.png
spec/png_suite/sizes/s06i3p02.png
spec/png_suite/sizes/s06n3p02.png
spec/png_suite/sizes/s07i3p02.png
spec/png_suite/sizes/s07n3p02.png
spec/png_suite/sizes/s08i3p02.png
spec/png_suite/sizes/s08n3p02.png
spec/png_suite/sizes/s09i3p02.png
spec/png_suite/sizes/s09n3p02.png
spec/png_suite/sizes/s32i3p04.png
spec/png_suite/sizes/s32n3p04.png
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spec/png_suite/sizes/s35n3p04.png
spec/png_suite/sizes/s36i3p04.png
spec/png_suite/sizes/s36n3p04.png
spec/png_suite/sizes/s37i3p04.png
spec/png_suite/sizes/s37n3p04.png
spec/png_suite/sizes/s38i3p04.png
spec/png_suite/sizes/s38n3p04.png
spec/png_suite/sizes/s39i3p04.png
spec/png_suite/sizes/s39n3p04.png
spec/png_suite/sizes/s40i3p04.png
spec/png_suite/sizes/s40n3p04.png
spec/png_suite/transparency/tbbn1g04.png
spec/png_suite/transparency/tbbn2c16.png
spec/png_suite/transparency/tbbn3p08.png
spec/png_suite/transparency/tbgn2c16.png
spec/png_suite/transparency/tbgn3p08.png
spec/png_suite/transparency/tbrn2c08.png
spec/png_suite/transparency/tbwn1g16.png
spec/png_suite/transparency/tbwn3p08.png
spec/png_suite/transparency/tbyn3p08.png
spec/png_suite/transparency/tp0n1g08.png
spec/png_suite/transparency/tp0n2c08.png
spec/png_suite/transparency/tp0n3p08.png
spec/png_suite/transparency/tp1n3p08.png
spec/png_suite_spec.rb
spec/resources/adam7.png
spec/resources/bezier_five_point.png
spec/resources/bezier_four_point.png
spec/resources/bezier_four_point_flipped.png
spec/resources/bezier_four_point_s.png
spec/resources/bezier_six_point.png
spec/resources/bezier_three_point.png
spec/resources/bezier_three_point_flipped.png
spec/resources/circles.png
spec/resources/clock.png
spec/resources/clock_base.png
spec/resources/clock_bl_xdown_ydown.png
spec/resources/clock_bl_xdown_yup.png
spec/resources/clock_bl_xup_yup.png
spec/resources/clock_mask.png
spec/resources/clock_mask_updated.png
spec/resources/clock_nn_xdown_ydown.png
spec/resources/clock_nn_xdown_yup.png
spec/resources/clock_nn_xup_yup.png
spec/resources/clock_updated.png
spec/resources/composited.png
spec/resources/cropped.png
spec/resources/damaged_chunk.png
spec/resources/damaged_signature.png
spec/resources/lines.png
spec/resources/operations.png
spec/resources/operations_grayscale.png
spec/resources/partial_circles.png
spec/resources/pixelstream.rgb
spec/resources/pixelstream.rgba
spec/resources/pixelstream_best_compression.png
spec/resources/pixelstream_fast_rgba.png
spec/resources/pixelstream_reference.png
spec/resources/polygon_filled_horizontal.png
spec/resources/polygon_filled_vertical.png
spec/resources/polygon_triangle_filled.png
spec/resources/polygon_unfilled.png
spec/resources/rect.png
spec/resources/replaced.png
spec/resources/text_chunk.png
spec/resources/ztxt_chunk.png
spec/spec_helper.rb
tasks/benchmarks.rake
tasks/github-gem.rake
Has rdoc
true
Homepage
http://wiki.github.com/wvanbergen/chunky_png
Rdoc options
--title
chunky_png
--main
README.rdoc
--line-numbers
--inline-source
Require paths
lib
Required ruby version
>= 0
Required rubygems version
>= 0
Rubygems version
1.6.2
Specification version
3
Summary
Pure ruby library for read/write, chunk-level access to PNG files
Test files
spec/chunky_png/canvas/adam7_interlacing_spec.rb
spec/chunky_png/canvas/data_url_exporting_spec.rb
spec/chunky_png/canvas/data_url_importing_spec.rb
spec/chunky_png/canvas/drawing_spec.rb
spec/chunky_png/canvas/masking_spec.rb
spec/chunky_png/canvas/operations_spec.rb
spec/chunky_png/canvas/png_decoding_spec.rb
spec/chunky_png/canvas/png_encoding_spec.rb
spec/chunky_png/canvas/resampling_spec.rb
spec/chunky_png/canvas/stream_exporting_spec.rb
spec/chunky_png/canvas/stream_importing_spec.rb
spec/chunky_png/canvas_spec.rb
spec/chunky_png/color_spec.rb
spec/chunky_png/datastream_spec.rb
spec/chunky_png/dimension_spec.rb
spec/chunky_png/image_spec.rb
spec/chunky_png/point_spec.rb
spec/chunky_png/rmagick_spec.rb
spec/chunky_png/vector_spec.rb
spec/chunky_png_spec.rb
spec/png_suite_spec.rb
Original platform
ruby
New platform
ruby