get_or_rasterize() [2/2]

const GlyphMetrics * MayaFlux::Portal::Text::GlyphAtlas::get_or_rasterize

(

FT_ULong

codepoint

)

Convenience: look up by Unicode codepoint.

Tries the primary face first, then each fallback face in registration order, returning the first hit. Prefer the glyph_index overload when integrating with HarfBuzz output (primary face only, no fallback).

Parameters

codepoint

Unicode codepoint (e.g. U+0041 for 'A').

Returns

Pointer to cached GlyphMetrics, or nullptr if no face (primary or fallback) has this codepoint.

Definition at line 23 of file GlyphAtlas.cpp.

{
    if (!m_face.is_loaded()) {
        MF_ERROR(Journal::Component::Portal, Journal::Context::API,
            "GlyphAtlas::get_or_rasterize: FontFace not loaded");
        return nullptr;
    }
 
    if (const FT_UInt idx = FT_Get_Char_Index(m_face.get_face(), codepoint); idx != 0) {
        return get_or_rasterize_from(m_face, idx);
    }
 
    for (FontFace* fallback : m_fallbacks) {
        if (!fallback || !fallback->is_loaded()) {
            continue;
        }
        if (const FT_UInt idx = FT_Get_Char_Index(fallback->get_face(), codepoint); idx != 0) {
            return get_or_rasterize_from(*fallback, idx);
        }
    }
 
    MF_WARN(Journal::Component::Portal, Journal::Context::API,
        "GlyphAtlas: no glyph for codepoint U+{:04X} in primary or {} fallback face(s)",
        static_cast<uint32_t>(codepoint), m_fallbacks.size());
    return nullptr;
}

References MayaFlux::Journal::API, MayaFlux::Portal::Text::FontFace::get_face(), get_or_rasterize_from(), MayaFlux::Portal::Text::FontFace::is_loaded(), m_face, m_fallbacks, MF_ERROR, MF_WARN, and MayaFlux::Journal::Portal.

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