From 4a20751ff62efeb788a8a4fb06313e4485fc2808 Mon Sep 17 00:00:00 2001
From: Rodrigo Tobar <rtobarc@gmail.com>
Date: Thu, 2 Mar 2023 00:05:25 +0800
Subject: [PATCH] LibPDF: Detect CFF encodings with supplements

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.
---
 Userland/Libraries/LibPDF/Fonts/CFF.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibPDF/Fonts/CFF.cpp b/Userland/Libraries/LibPDF/Fonts/CFF.cpp
index 5307c594e9..6abbba5994 100644
--- a/Userland/Libraries/LibPDF/Fonts/CFF.cpp
+++ b/Userland/Libraries/LibPDF/Fonts/CFF.cpp
@@ -412,7 +412,9 @@ PDFErrorOr<Vector<CFF::Glyph>> CFF::parse_charstrings(Reader&& reader, Vector<By
 PDFErrorOr<Vector<u8>> CFF::parse_encoding(Reader&& reader)
 {
     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) {
         auto n_codes = TRY(reader.try_read<Card8>());
         for (u8 i = 0; i < n_codes; i++) {