mirror of
https://github.com/RGBCube/serenity
synced 2025-05-31 14:38:11 +00:00
1eaaa8c3e9
Several ramifications: * /JBIG2Globals is an indirect reference, which means we now need a Document for unfiltering. (Technically, other decode parameters can also be indirect objects and we should use the Document to resolve() those too, but in practice it only seems to be needed for /JBIG2Globals.) * Since /JBIG2Globals are so rare, we just parse once for each image that use them, and decode_embedded() now receives a Vector<ReadonlyBytes> with all sections of sequences of segments. * Internally, decode_segment_headers() is now called several times for embedded JBIG2s with multiple such sections (e.g. PDFs with /JBIG2Globals). * That means `data` is now no longer part of JBIG2LoadingContext and things get slightly reshuffled due to this. This completes the LibPDF part of JBIG2 support. Once LibGfx implements actual decoding of JBIG2s, things should start to Just Work in PDFs.
36 lines
819 B
C++
36 lines
819 B
C++
/*
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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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virtual IntSize size() override;
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virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) override;
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static ErrorOr<ByteBuffer> decode_embedded(Vector<ReadonlyBytes>);
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private:
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JBIG2ImageDecoderPlugin();
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OwnPtr<JBIG2LoadingContext> m_context;
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};
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}
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