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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.
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12 changed files with 86 additions and 22 deletions
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Userland/Libraries/LibGfx/ImageFormats/JBIG2Loader.h
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Userland/Libraries/LibGfx/ImageFormats/JBIG2Loader.h
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/*
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* Copyright (c) 2024, Nico Weber <thakis@chromium.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/MemoryStream.h>
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#include <AK/OwnPtr.h>
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#include <LibGfx/ImageFormats/ImageDecoder.h>
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namespace Gfx {
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struct JBIG2LoadingContext;
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class JBIG2ImageDecoderPlugin : public ImageDecoderPlugin {
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public:
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static bool sniff(ReadonlyBytes);
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static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
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virtual ~JBIG2ImageDecoderPlugin() override = default;
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};
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}
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