Hello, I'm trying to design a glyph fallback system for Haiku. This would allow rendering glyphs using a font different from the one asked by the user, if the glyphs are nt available. For example, Haiku could render Japanese fonts out of the box even if VL Gothic is not the default system font. Currently selecting Japanese in the locale preflet makes Haiku display only squares instead of the glyphs. However, I'm not very familiar with the internals of the app_server. I've found that the actual text rendering occurs in GlyphLayoutEngine::LayoutGlyphs, itself calling FontCacheEntry->Glyph() to get the glyph for each character it needs to draw. I'm not sure this is the right place to handle things. Currently, a missing glyph is replaced with a square, this is'nt done by any of these functions, so I guess at this point of the drawing it's already too late and the square glyph was already inserted. I have no idea where this happens and how to check for it. a) Where is this replacement with a square done ? b) I will remove the replacement with a square, should I replace it with loading another font for finding the glyph, or would that better be done elsewhere (knowing that the method that returned the square would now error out, I could do it in FontCacheEntry::Glyph, for example). If so, where should this fallback be done ? Thanks, -- Adrien.