Interoperability with RMagick

ChunkyPNG can import and export images to RMagick quickly, without creating files. You need to require the 'chunky_png/rmagick' file to enable the interoperability. This enables the ChunkyPNG::RMagick.export and ChunkyPNG::RMagick.import methods:

require 'rmagick'
require 'chunky_png/rmagick'

canvas = ChunkyPNG::Canvas.from_file('filename.png')
image = ChunkyPNG::RMagick.export(canvas)

# do something with the image using RMagick

updated_canvas = ChunkyPNG::RMagick.import(image)
updated_canvas.save('filename.png', :fast_rgba)