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LibGfx: Add the start of a JBIG2 loader

JBIG2 is infamous for two things:

1. It's used in xerox scanners were it falsifies scanned numbers:

https://www.dkriesel.com/en/blog/2013/0802_xerox-workcentres_are_switching_written_numbers_when_scanning

2. It was allegedly used in an iOS zero day, in a very cool way:

https://googleprojectzero.blogspot.com/2021/12/a-deep-dive-into-nso-zero-click.html

Needless to say, we need support for it in Serenity. (...because it's
used in PDF files.)

This adds all the scaffolding, but no actual implementation yet.

It's enough for `file` to print the mime type of .jb2 files, but `image`
can't do anything with the files yet.
This commit is contained in:
Nico Weber 2024-03-03 09:21:30 -05:00 committed by Andreas Kling
parent d7ad134ae5
commit 58838db445
12 changed files with 86 additions and 22 deletions

View file

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/*
* Copyright (c) 2024, Nico Weber <thakis@chromium.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/MemoryStream.h>
#include <AK/OwnPtr.h>
#include <LibGfx/ImageFormats/ImageDecoder.h>
namespace Gfx {
struct JBIG2LoadingContext;
class JBIG2ImageDecoderPlugin : public ImageDecoderPlugin {
public:
static bool sniff(ReadonlyBytes);
static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
virtual ~JBIG2ImageDecoderPlugin() override = default;
};
}