PNGUtil

This project was built from stumpy_png and stumpy_core. Many thanks to @l3kn for all the work you did!

Usage

Install the png_util shard

1. shards init
2. Add the dependency to the shard.yml file

...
dependencies:
  png_util:
    github: matthewmcgarvey/png_util
...

3. shards install

Resize Image

require "png_util"

canvas = PNGUtil.read("foo.png")
canvas.resize(120, 120)
PNGUtil.write(canvas, "resized-foo.png")

Troubleshooting

If you run into errors like

/usr/bin/ld: cannot find -lz
collect2: error: ld returned 1 exit status

make sure zlib is installed (Installing zlib under ubuntu).