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https://github.com/RGBCube/serenity
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bcc6439b5f
It's a bit unfortunate that fonts need to know about the renderer, but type 3 fonts contain PDF drawing operators, so it's necessary. On the bright side, it makes it possible to pass fewer parameters around and compute things locally as needed. (As we implement more fonts, we'll probably want to create some functions to do these computations in a central place, eventually.) No behavior change.
39 lines
1.4 KiB
C++
39 lines
1.4 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 <LibGfx/Point.h>
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#include <LibPDF/Fonts/PDFFont.h>
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namespace PDF {
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class SimpleFont : public PDFFont {
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public:
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PDFErrorOr<Gfx::FloatPoint> draw_string(Gfx::Painter&, Gfx::FloatPoint, DeprecatedString const&, Renderer const&) override;
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protected:
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PDFErrorOr<void> initialize(Document* document, NonnullRefPtr<DictObject> const& dict, float font_size) override;
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virtual Optional<float> get_glyph_width(u8 char_code) const = 0;
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virtual PDFErrorOr<void> draw_glyph(Gfx::Painter& painter, Gfx::FloatPoint point, float width, u8 char_code, Color color) = 0;
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RefPtr<Encoding>& encoding() { return m_encoding; }
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RefPtr<Encoding> const& encoding() const { return m_encoding; }
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Gfx::AffineTransform& font_matrix() { return m_font_matrix; }
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private:
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RefPtr<Encoding> m_encoding;
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RefPtr<StreamObject> m_to_unicode;
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HashMap<u8, u16> m_widths;
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u16 m_missing_width { 0 };
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// "For all font types except Type 3, the units of glyph space are one-thousandth of a unit of text space;
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// for a Type 3 font, the transformation from glyph space to text space is defined by a font matrix specified
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// in an explicit FontMatrix entry in the font."
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Gfx::AffineTransform m_font_matrix { 1.0f / 1000.0f, 0, 0, 1.0f / 1000.0f, 0, 0 };
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};
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}
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