spritesheet-js/lib/sorter/sorter.js

Spritesheet generator

// based on: http://codeincomplete.com/posts/2011/5/7/bin_packing/example/

var Sorters = {
    w: function (a, b) {
        return b.w - a.w;
    },
    h: function (a, b) {
        return b.h - a.h;
    },
    a: function (a, b) {
        return b.area - a.area;
    },
    max: function (a, b) {
        return Math.max(b.w, b.h) - Math.max(a.w, a.h);
    },
    min: function (a, b) {
        return Math.min(b.w, b.h) - Math.min(a.w, a.h);
    }
};

var MultiSorters = {
    height: function (a, b) {
        return msort(a, b, ['h', 'w']);
    },
    width: function (a, b) {
        return msort(a, b, ['w', 'h']);
    },
    area: function (a, b) {
        return msort(a, b, ['a', 'h', 'w']);
    },
    maxside: function (a, b) {
        return msort(a, b, ['max', 'min', 'h', 'w']);
    }
};

exports.run = function (method, files) {
    if (method != 'none') {
        var filter = MultiSorters[method];
        if (filter) {
            files.sort(filter);
        }
    }
};

function msort(a, b, criteria) { /* sort by multiple criteria */

    var diff, n;

    for (n = 0; n < criteria.length; n++) {

        diff = Sorters[criteria[n]](a, b);

        if (diff !== 0) {
            return diff;
        }
    }

    return 0;
}