Library for packing sprite sheets.¶ ↑

Zwoptex is a ruby library to pack images into sprite sheets. It requires ChunkyPNG and Plist gems.

Usage¶ ↑

images = {
  'fiskemel.png' => ChunkyPNG::Image.from_file('images/fiskemel.png'),
  'kridt.png' => ChunkyPNG::Image.from_file('images/kridt.png'),
  'skalle.png' => ChunkyPNG::Image.from_file('images/skalle.png')
}

# creating an atlas
atlas = Zwoptex::Atlas.new(1024, 1024, images)

# arrange images using tree algorithm
atlas.pack_using_tree! :spacing => 2

# save coords data
plist_content = atlas.format_cocos2d_plist(:texture_filename => 'atlas.png')
File.write 'atlas.plist', plist_content

# save image
image = atlas.render_image
image.save 'atlas.png', :compression => Zlib::BEST_COMPRESSION