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https://github.com/RGBCube/serenity
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c4507bb56e
The first iteration has enough SIDs to display simple documents, but when trying more and more documents we started to need more of these SIDs to be properly defined. This is a copy/paste exercise from the CFF document, which is tedious, so it will continue in small drops. This commit fills all the gaps until SID 228, which covers all the ISOAdobe space, and should be enough for most use cases. Since this is a continuous space starting at 0, we now use an Array instead of a Map to store these names, which should be more performant. Also to simplify things I've moved the Array out of the CFF class, making it a simpler static variable, which allows us to use template type deduction.
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
/*
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* Copyright (c) 2023, Rodrigo Tobar <rtobarc@gmail.com>.
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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/Tuple.h>
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#include <AK/Types.h>
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#include <LibPDF/Error.h>
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#include <LibPDF/Fonts/Type1FontProgram.h>
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namespace PDF {
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class Reader;
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class CFF : public Type1FontProgram {
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private:
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// Table 9: Top DICT Operator Entries
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enum class TopDictOperator {
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Version = 0,
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Notice,
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FullName,
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FamilyName,
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Weight,
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FontBBox,
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// UniqueID = 13,
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// XUID,
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Charset = 15,
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Encoding,
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CharStrings,
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Private,
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// IsFixedPitch = (12 << 8 | 1),
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// ItalicAngle,
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// UnderlinePosition,
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// UnderlineThickness,
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// PaintType,
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};
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enum class PrivDictOperator {
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Subrs = 19,
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DefaultWidthX,
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NominalWidthX,
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};
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public:
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static PDFErrorOr<NonnullRefPtr<CFF>> create(ReadonlyBytes const&, RefPtr<Encoding> encoding);
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// to private
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using Card8 = u8;
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using Card16 = u16;
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using Offset = i32;
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using OffSize = u8;
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using SID = u16;
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using DictOperand = Variant<int, float>;
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static int load_int_dict_operand(u8 b0, Reader&);
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static float load_float_dict_operand(Reader&);
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static PDFErrorOr<DictOperand> load_dict_operand(u8, Reader&);
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using IndexDataHandler = Function<PDFErrorOr<void>(ReadonlyBytes const&)>;
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static PDFErrorOr<void> parse_index(Reader& reader, IndexDataHandler&&);
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template<typename OffsetType>
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static PDFErrorOr<void> parse_index_data(Card16 count, Reader& reader, IndexDataHandler&);
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template<typename OperatorT>
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using DictEntryHandler = Function<PDFErrorOr<void>(OperatorT, Vector<DictOperand> const&)>;
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template<typename OperatorT>
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static PDFErrorOr<void> parse_dict(Reader& reader, DictEntryHandler<OperatorT>&& handler);
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template<typename OperatorT>
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static PDFErrorOr<OperatorT> parse_dict_operator(u8, Reader&);
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static PDFErrorOr<Vector<CFF::Glyph>> parse_charstrings(Reader&&, Vector<ByteBuffer> const& subroutines);
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static PDFErrorOr<Vector<DeprecatedFlyString>> parse_charset(Reader&&, size_t);
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static PDFErrorOr<Vector<u8>> parse_encoding(Reader&&);
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};
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}
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