font-generation-libgdx

generate.java

private static void generateFonts() {
    // if fonts are already generated, just load from file
    Preferences fontPrefs = Gdx.app.getPreferences("org.jrenner.superior.font");
    int displayWidth = fontPrefs.getInteger("display-width", 0);
    int displayHeight = fontPrefs.getInteger("display-height", 0);
    boolean loaded = false;
    if (displayWidth != Gdx.graphics.getWidth() || displayHeight != Gdx.graphics.getHeight()) {
        Tools.log.debug("Screen size change detected, regenerating fonts");
    } else {
        try {
            // try to load from file
            Tools.log.debug("Loading generated fonts from file cache");
            smallGeneratedFont = new BitmapFont(getFontFile("exo-small.fnt"));
            normalGeneratedFont = new BitmapFont(getFontFile("exo-normal.fnt"));
            largeGeneratedFont = new BitmapFont(getFontFile("exo-large.fnt"));
            monoGeneratedFont = new BitmapFont(getFontFile("lib-mono.fnt"));
            loaded = true;
        } catch (GdxRuntimeException e) {
            Tools.log.debug("Couldn't load pre-generated fonts. Will generate fonts.");
        }
    }
    if (!loaded || forceGeneration) {
        forceGeneration = false;
        float width = Gdx.graphics.getWidth();
        float ratio = width / 1280f; // use 1920x1280 as baseline, arbitrary
        float baseSize = 28f; // for 28 sized fonts at baseline width above
        // define other sizes
        int size = (int) (baseSize * ratio);
        int smallSize = (int) (size * 0.75f);
        int largeSize = (int) (size * 1.5f);

        // store screen width for detecting screen size change
        // on later startups, which will require font regeneration
        fontPrefs.putInteger("display-width", Gdx.graphics.getWidth());
        fontPrefs.putInteger("display-height", Gdx.graphics.getHeight());
        fontPrefs.flush();

        FileHandle exoFile = Gdx.files.internal("fonts/Exo-Regular.otf");
        int pageSize = 512; // size of atlas pages for font pngs
        smallGeneratedFont = generateFontWriteFiles("exo-small", exoFile, smallSize, pageSize, pageSize);
        normalGeneratedFont = generateFontWriteFiles("exo-normal", exoFile, size, pageSize, pageSize);
        largeGeneratedFont = generateFontWriteFiles("exo-large", exoFile, largeSize, pageSize, pageSize);

       	FileHandle libMonoFile = Gdx.files.internal("fonts/LiberationMono-Regular.ttf");
        monoGeneratedFont = generateFontWriteFiles("lib-mono", libMonoFile, smallSize, pageSize, pageSize);
    }
}