yesterday I started working om making custom sized fonts to my game, in game, using FreeTypeFaceGenerator, and yesterday it worked fine, except an exception I was going to handle today. When I loaded it up today, and tried to run it, it keeps crashing in the part where I create the FTFGen object, I have no idea how to fix this. How do I fix this, where do I even begin? I changed to font file and it gives me the same error it did yesterday, but I don't want the other file (Vivaldi), I need the one I'm testing (Viner Hand ITC). How do I fix this? I'm using .TTF files, not making a bitmapfont file.

I don't want to provide my own source code, but I'll post the same way, just change a couple of things: (I followed a guide located here )
The method recieves three parameters, A FileHandle of the font file, a String of the font name, and a float array with all the sizes which will then turn to size of the font using
This is the code:

FreeTypeFontGenerator ftfGen = new FreeTypeFontGenerator(handle);
    for (float x : size) {
        PixmapPacker packer = new PixmapPacker(512, 512, Format.RGBA8888,
                2, false);
        FreeTypeBitmapFontData fontData = ftfGen.generateData(
                (int) (x * Gdx.graphics.getDensity()),
                FreeTypeFontGenerator.DEFAULT_CHARS, false, packer);
        Array<Page> pages = packer.getPages();
        TextureRegion[] textureRegions = new TextureRegion[pages.size];
        for (int i = 0; i < pages.size; i++) {
            Page p = pages.get(i);
            Texture texture = new Texture(new PixmapTextureData(
                    p.getPixmap(), p.getPixmap().getFormat(), false, false,
                    true)) {
                public void dispose() {
            textureRegions[i] = new TextureRegion(texture);
            BitmapFont font = new BitmapFont(fontData, textureRegions,
            FileHandle file = Gdx.files.local("Data\\VINERITC.TTF");
            FileHandle pixmapDir = Gdx.files.local("Data\\VINERITC");
            String[] pageRefs = BitmapFontWriter.writePixmaps(
                    packer.getPages(), pixmapDir, fontName);
            for (int j = 0; j < pageRefs.length; j++) {
                pageRefs[j] = fontName + "_" + pageRefs[j];
                    new FontInfo(fontName, (int) (x * Gdx.graphics
                            .getDensity())), 1, 1);


The error I am receiving is in this line of code:
FreeTypeFontGenerator ftfGen = new FreeTypeFontGenerator(handle);
Upon digging around in the code of LibGDX I found out that it is caused by this method, which uses a native method:

    public static Face newMemoryFace(Library library, byte[] data, int dataSize, int faceIndex) {
    ByteBuffer buffer = BufferUtils.newUnsafeByteBuffer(data.length);
    BufferUtils.copy(data, 0, buffer, data.length);
    long address = newMemoryFace(library.address, buffer, dataSize, faceIndex);
    if(address == 0) {
        throw new GdxRuntimeException("Couldn't load font");
    else {
        library.fontData.put(address, buffer);
        return new Face(address, library);

private static native long newMemoryFace(long library, ByteBuffer data, int dataSize, int faceIndex);

This part gives out the error:

long address = newMemoryFace(library.address, buffer, dataSize, faceIndex);
        if(address == 0) {
            throw new GdxRuntimeException("Couldn't load font");

The newMemoryFace is a native method.

I FOUND THE PROBLEM! This line is the problem:

FileHandle file = Gdx.files.local("Data\\VINERITC.TTF");

This line caused a creation of a new TTF file, and thus cause a problem with the loading system, make sure if you use this to write .fnt and not TTF.

  • \$\begingroup\$ If you're using version control, why not just roll back your change? \$\endgroup\$
    – ashes999
    Jun 16, 2014 at 20:01
  • \$\begingroup\$ I'm not using version control, but it's the exact same code from last night the only thing I change was full screen so I could bugfix the problem which when using a different font creates the exception I was going to fix. I changed it back but it's still the same Couldn't load font exception... \$\endgroup\$ Jun 16, 2014 at 20:06
  • 1
    \$\begingroup\$ Please begin by providing us current source code examples that we may look over as a starting point. \$\endgroup\$
    – Matt Sams
    Jun 16, 2014 at 20:59
  • \$\begingroup\$ Added source code. \$\endgroup\$ Jun 16, 2014 at 21:07
  • 2
    \$\begingroup\$ Please use version control. You'll save yourself hours of headaches. Git and Mercurial both work without a central server and allow local check-ins. \$\endgroup\$
    – ashes999
    Jun 16, 2014 at 21:21

1 Answer 1


To anyone who had run into this problem, it originates from the creation (at least for me) of another TTF file in the local directory (I.e. "myGDXGame-desktop"), and this causes a problem with the loading of the font. Make sure that this line, that is the save directory for the .fnt file, is not saving as .TTF
This was what's needed to be made:

FileHandle file = Gdx.files.local("Data\\VINERITC.TTF"); 

Changed to this:

FileHandle file = Gdx.files.local("Data\\VINERITC.fnt");

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