mirror of
https://github.com/RGBCube/serenity
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7c4f5b58be
This gives much better visual results than painting the path directly. It also has the nice side effect that Type 1 fonts will now look much more similar to TrueType fonts, which use the same class :^) In addition, we can now cache glyph bitmaps for repeated use.
84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
/*
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* Copyright (c) 2022, Julian Offenhäuser <offenhaeuser@protonmail.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/Forward.h>
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#include <LibGfx/AffineTransform.h>
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#include <LibGfx/Path.h>
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#include <LibPDF/Error.h>
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namespace PDF {
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class Reader;
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class Encoding;
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class PS1FontProgram : public RefCounted<PS1FontProgram> {
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public:
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PDFErrorOr<void> parse(ReadonlyBytes const&, size_t cleartext_length, size_t encrypted_length);
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RefPtr<Gfx::Bitmap> rasterize_glyph(u32 code_point, float width);
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Gfx::Path build_char(u32 code_point, float width);
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RefPtr<Encoding> encoding() const { return m_encoding; }
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Gfx::FloatPoint glyph_translation(u32 code_point, float width) const;
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private:
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struct Glyph {
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Gfx::Path path;
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float width;
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};
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struct GlyphParserState {
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Glyph glyph;
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Gfx::FloatPoint point;
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bool flex_feature { false };
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size_t flex_index;
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Array<float, 14> flex_sequence;
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size_t sp { 0 };
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Array<float, 24> stack;
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size_t postscript_sp { 0 };
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Array<float, 24> postscript_stack;
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};
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Gfx::AffineTransform glyph_transform_to_device_space(Glyph const&, float width) const;
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PDFErrorOr<Glyph> parse_glyph(ReadonlyBytes const&, GlyphParserState&);
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PDFErrorOr<void> parse_encrypted_portion(ByteBuffer const&);
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PDFErrorOr<Vector<ByteBuffer>> parse_subroutines(Reader&);
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PDFErrorOr<Vector<float>> parse_number_array(Reader&, size_t length);
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PDFErrorOr<String> parse_word(Reader&);
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PDFErrorOr<float> parse_float(Reader&);
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PDFErrorOr<int> parse_int(Reader&);
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PDFErrorOr<ByteBuffer> decrypt(ReadonlyBytes const&, u16 key, size_t skip);
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bool seek_name(Reader&, String const&);
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static Error error(
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String const& message
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#ifdef PDF_DEBUG
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,
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SourceLocation loc = SourceLocation::current()
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#endif
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);
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Vector<ByteBuffer> m_subroutines;
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Vector<ByteBuffer> m_character_names;
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HashMap<u16, Glyph> m_glyph_map;
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Gfx::AffineTransform m_font_matrix;
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RefPtr<Encoding> m_encoding;
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u16 m_encryption_key { 4330 };
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int m_lenIV { 4 };
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};
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}
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