PngStitcher

An optimized way to stack an arbitrary number of PNGs with the same width.

Installation

Add this line to your application's Gemfile:

gem "png_stitcher"

And then execute:

$ bundle

Or install it yourself as:

$ gem install png_stitcher

Usage

require "png_stitcher"

a = File.binread("/path/to/a.png")
b = File.binread("/path/to/b.png")
c = PngStitcher.stitch([a, b])
File.open("/path/to/c.png", "wb") { |f| f.write(c) }

# c.png now contains a.png + b.png

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/cph/png_stitcher.

License

The gem is available as open source under the terms of the MIT License.