TextMesh Pro 1.4.1 Can't create font using Editor script that has kerning information

There doesn't seem to be a way to save kerning information when creating a font from script. The TMP_FontAsset.TryAddCharacters overloads doesn't include kerning.

In TMPro.FontAssetCreatorWindow.cs, I see that you use GetKerningTable()
to get the kerning information when saving a font. However, I can't seem to access FontEngine.GetGlyphPairAdjustmentTable() from my own editor script.

The only way to save kerning information when creating a font from script seems to be to create an object in the scene, add a canvas and a textMeshPro component to it, assign the created font to the textmeshpro component and assign a string with all the characters that I want to render then force a mesh update:

Code (CSharp):

1. GameObject obj = new GameObject();
2. obj.AddComponent<Canvas>().renderMode = RenderMode.ScreenSpaceOverlay;
3. TextMeshProUGUI tmPro = obj.AddComponent<TextMeshProUGUI>();
4.  
5. TMP_FontAsset fontAsset =
6. MP_FontAsset.CreateFontAsset(font, m_fontGenerationSettings.fontSize, m_fontGenerationSettings.characterPadding, m_fontGenerationSettings.fontRenderMode, m_fontGenerationSettings.atlasWidth, m_fontGenerationSettings.atlasHeight, AtlasPopulationMode.Dynamic);
7. FontAssetCreationSettings settings = fontAsset.creationSettings;
8. settings.includeFontFeatures = true;
9. fontAsset.creationSettings = settings;
10.  
11. tmPro.font = fontAsset;
12. tmPro.text = charactersToRender;
13. EditorUtility.SetDirty(tmPro);
14. tmPro.ForceMeshUpdate();

However, doing it this way has some problems. The font creation was very slow when using certain fonts due to line 1626 in TMP_FontAsset.cs where it is doing FontEngine.GetGlyphPairAdjustmentTable(s_GlyphIndexArray);

 

I'll take a look when I have an opportunity.

Most likely I will add an optional overload to the TMP_FontAsset.TryAddCharacters function to determine if the Font Features for the glyphs that were successfully added to the font asset should also be included.