FontSourceHandle RpiPlatform::systemFont(const std::string& _name, const std::string& _weight,
const std::string& _face) const {
std::string fontFile = systemFontPath(m_fcConfig, _name, _weight, _face);
if (fontFile.empty()) { return {}; }
return FontSourceHandle(Url(fontFile));
}
FontID FontContext::addFont(const std::string& _family, const std::string& _weight,
const std::string& _style, bool _tryFallback) {
unsigned int dataSize = 0;
unsigned char* data = nullptr;
int font = FONS_INVALID;
std::string fontKey = _family + "_" + _weight + "_" + _style;
auto it = m_fonts.find(fontKey);
if (it != m_fonts.end()) {
if (it->second < 0) {
goto fallback;
}
return it->second;
}
{
// Assuming bundled ttf file follows this convention
auto bundledFontPath = "fonts/" + _family + "-" + _weight + _style + ".ttf";
if (!(data = bytesFromFile(bundledFontPath.c_str(), PathType::resource, &dataSize)) &&
!(data = bytesFromFile(bundledFontPath.c_str(), PathType::internal, &dataSize))) {
const std::string sysFontPath = systemFontPath(_family, _weight, _style);
if ( !(data = bytesFromFile(sysFontPath.c_str(), PathType::absolute, &dataSize)) ) {
LOGE("Could not load font file %s", fontKey.c_str());
m_fonts.emplace(std::move(fontKey), INVALID_FONT);
goto fallback;
}
}
}
font = fonsAddFont(m_fsContext, fontKey.c_str(), data, dataSize);
if (font == FONS_INVALID) {
LOGE("Could not load font %s", fontKey.c_str());
m_fonts.emplace(std::move(fontKey), INVALID_FONT);
goto fallback;
}
m_fonts.emplace(std::move(fontKey), font);
return font;
fallback:
if (_tryFallback && m_fonts.size() > 0) {
return 0;
}
return INVALID_FONT;
}