macula is a small command line tool that generates retina assets with different scales(3x,2x,1x) for iOS application development.
First, open your terminal and make sure the binary is executable:
$ chmod +x macula
Then, open(or create) .bash_profile or your preferred shell's configuration file in your home directory and add the following line:
export PATH="/folder/containing/macula/binary:$PATH"
That's all! Now you can start using macula after restarting your terminal session.
if you have root access you can copy the executable or make a symbolic link to your bin folder:
# cp /path/to/macula /usr/bin/. or # ln -s /path/to/macula /usr/bin/macula
Just provide the path of your source asset as an argument:
$ macula /path/to/my/[email protected]
macula will create [email protected] and xxx.png in the same directory as the original file. One important thing: your original asset must have @3x suffix, or it will be ignored. macula also accepts multiple files e.g:
$ macula /path/to/my/asset1.png /path/to/my/asset2.png ...
or even better:
$ macula '/my/assets/folder/*
will generate scaled versions for all the 3x images in the folder. leaving other files untouched.