Help with SDF Rendering

[Stephan B . via FreeType users]

   Hi!
   I would like to get more information on how to set the spread for SDF
   Rendering. Can you provide a simple example of that?
   Next, I am also trying to render SDF from glyph outline.
   Using
   FT_Load_Glyph(m_Face, glyphIndex, FT_LOAD_DEFAULT);


   And then
   FT_Render_Glyph(glyphSlot, FT_RENDER_MODE_SDF)
   appears to be rendering using BSDF. How do I instead generate the SDF
   from glyph outline?



   Regards,