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LibPDF: Detect CFF encodings with supplements

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These are not yet actually parsed, but detecting them means we at least
don't fail to understand the *actual* format value, which was causing
some CFF fonts to fail to load.
This commit is contained in:
Rodrigo Tobar 2023-03-02 00:05:25 +08:00 • committed by Andreas Kling
parent 9bca62c5fa
commit 4a20751ff6
1 changed files with 3 additions and 1 deletions
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4
Userland/Libraries/LibPDF/Fonts/CFF.cpp
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@ -412,7 +412,9 @@ PDFErrorOr<Vector<CFF::Glyph>> CFF::parse_charstrings(Reader&& reader, Vector<By
PDFErrorOr<Vector<u8>> CFF::parse_encoding(Reader&& reader) PDFErrorOr<Vector<u8>> CFF::parse_encoding(Reader&& reader)
{ {
Vector<u8> encoding_codes; Vector<u8> encoding_codes;
auto format = TRY(reader.try_read<Card8>()); auto format_raw = TRY(reader.try_read<Card8>());
// TODO: support encoding supplements when highest bit is set
auto format = format_raw & 0x7f;
if (format == 0) { if (format == 0) {
auto n_codes = TRY(reader.try_read<Card8>()); auto n_codes = TRY(reader.try_read<Card8>());
for (u8 i = 0; i < n_codes; i++) { for (u8 i = 0; i < n_codes; i++) {