FREE is an open source format for vector graphic files designed to be compact, human-readable, back-compatible, and optimized for multithreaded parsin

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2024-09-08 15:00:05

FREE is an open source format for vector graphic files designed to be compact, human-readable, back-compatible, and optimized for multithreaded parsing.

Lunacy has the support for the Sketch format from the very beginning. Including both opening and saving such files. It's actually a great format with lots of advantages (JSON, everything bundled in a ZIP archive, extensions via UserInfo, a time-proved data structure, and many others) but over time, we've accumulated a long list of drawbacks that have been limiting Lunacy’s growth.

Cumbersome MacOS-tied naming style for parameters: MSImmutableFreeformGroupLayout, MSJSONFileReference, MSAttributedStringColorAttribute, NSCTFontSymbolicTrait.

Some of the parameter names are overly verbose: allowsDefaultTighteningForTruncation, textStyleVerticalAlignmentKey, automaticallyDrawOnUnderlyingPath, includeBackgroundColorInInstance, MSAttributedStringColorDictionaryAttribute.

Lots of fields have to be explicitly specified even for default values, i.e. they do not affect anything. But if you try to optimize a file, Sketch won’t open it. Take the fields from the above example and multiply it by millions of points in an average document.