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LibPDF: Use Gfx::PathRasterizer for Adobe Type 1 font rendering

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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.
This commit is contained in:
Julian Offenhäuser 2022-11-17 23:18:00 +01:00 • committed by Andreas Kling
parent 0b6299849e
commit 7c4f5b58be
4 changed files with 69 additions and 11 deletions
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6
Userland/Libraries/LibPDF/Fonts/PS1FontProgram.h
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@ -20,9 +20,11 @@ class PS1FontProgram : public RefCounted<PS1FontProgram> {
public:
PDFErrorOr<void> parse(ReadonlyBytes const&, size_t cleartext_length, size_t encrypted_length);
Gfx::Path build_char(u32 code_point, Gfx::FloatPoint const& point, float width);
RefPtr<Gfx::Bitmap> rasterize_glyph(u32 code_point, float width);
Gfx::Path build_char(u32 code_point, float width);
RefPtr<Encoding> encoding() const { return m_encoding; }
Gfx::FloatPoint glyph_translation(u32 code_point, float width) const;
private:
struct Glyph {
@ -46,6 +48,8 @@ private:
Array<float, 24> postscript_stack;
};
Gfx::AffineTransform glyph_transform_to_device_space(Glyph const&, float width) const;
PDFErrorOr<Glyph> parse_glyph(ReadonlyBytes const&, GlyphParserState&);
PDFErrorOr<void> parse_encrypted_portion(ByteBuffer const&);
PDFErrorOr<Vector<ByteBuffer>> parse_subroutines(Reader&);