From 9975bdb2d1b5d5cd9e3bcfcf5d0bd730ba273b55 Mon Sep 17 00:00:00 2001
From: Lucas CHOLLET <lucas.chollet@free.fr>
Date: Fri, 21 Jul 2023 23:00:59 -0400
Subject: [PATCH] LibGfx/JPEGXL: Align the stream to byte boundary before
 reading a frame

As this is stated in the spec, all frames are byte-aligned.
---
 Userland/Libraries/LibGfx/ImageFormats/JPEGXLLoader.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Userland/Libraries/LibGfx/ImageFormats/JPEGXLLoader.cpp b/Userland/Libraries/LibGfx/ImageFormats/JPEGXLLoader.cpp
index 990f202c06..a43fe5b940 100644
--- a/Userland/Libraries/LibGfx/ImageFormats/JPEGXLLoader.cpp
+++ b/Userland/Libraries/LibGfx/ImageFormats/JPEGXLLoader.cpp
@@ -1456,6 +1456,10 @@ static ErrorOr<Frame> read_frame(LittleEndianInputBitStream& stream,
     ImageMetadata const& metadata,
     Optional<EntropyDecoder>& entropy_decoder)
 {
+    // F.1 - General
+    // Each Frame is byte-aligned by invoking ZeroPadToByte() (B.2.7)
+    stream.align_to_byte_boundary();
+
     Frame frame;
 
     frame.frame_header = TRY(read_frame_header(stream, metadata));