Gecko has internal support for a number of legacy Mac encodings that are not part of the Encoding Standard and that are *only* used for decoding the names of legacy TrueType fonts.
As part of rewriting our Web-facing decoder/encoder infrastructure per spec, some explicit action to deal with the font name code is needed (drop support for non-Encoding Standard font names or support them in a new non-Encoding Standard way). Have I understood correctly that the TrueType font name is not exposed by the Web Platform, is not used for identification by any Web Font mechanism and is, therefore, only relevant to identifying system fonts? Telemetry shows that the usage of these encodings isn't the same percentage across platforms, which suggests that fonts indeed aren't coming from the Web but are coming from the system font directory. Almost all OS X systems that run release-channel Firefox have a font with a MacHebrew name installed. MacHebrew is non-zero but tiny on Windows. MacArabic, MacCE, MacGreek and MacGujarati are almost exclusively seen on Windows! MacTurkish is more common on Windows than Mac. MacRomanian and MacGurmukhi are non-zero but tiny. MacIcelandic, MacDevanagari, MacFarsi and MacCroatian are at zero. MacRoman and MacCyrillic are part of the Encoding Standard and will continue to be supported in the form specified in the Encoding Standard. Legacy Mac encodings for CJK weren't Mac-specific and will continue to be supported in the form specified in the Encoding Standard. We don't support the rest of the legacy Mac encodings. Since TrueType fonts can have multiple name records, it's possible that the fonts that have legacy Mac name records also have Unicode or Windows name records, in which case us dropping support for (non-Roman, non-Cyrillic, non-CJK) legacy Mac font names wouldn't break stuff. How do we find out if we can remove support for (non-Roman, non-Cyrillic, non-CJK) legacy Mac font names? -- Henri Sivonen hsivo...@hsivonen.fi https://hsivonen.fi/ _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
