The files in this directory are used to override the generated 'resource\_ids.auto.h' (etc.) so that we can use 'fixtures/font\_compression/system\_resources.pbpack'. 'fixtures/font\_compression/system\_resources.pbpack' was generated by adding the following stanza to resources/normal/base/resource\_map.json: { "type": "font", "name": "GOTHIC_18_COMPRESSED", "file": "normal/base/ttf/18Cond.ttf", "compatibility": "2.7", "extended": true, "compress": "RLE4" }, and then rebuilding system\_resources.pbpack. See tools/update\_test\_system\_pbpack.sh for which files need to be updated.