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https://github.com/RGBCube/serenity
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fb0c3a9e18
When rendering text, a sequence of bytes corresponds to a glyph, but not necessarily to a character. This misunderstanding permeated through the Encoding through to the Font classes, which were all trying to calculate such values. Moreover, this was done only to identify "space" characters/glyphs, which were getting a special treatment (e.g., avoid rendering). Spaces are not special though -- there might be fonts that render something for them -- and thus should not be skipped
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
/*
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* Copyright (c) 2022, Matthew Olsson <mattco@serenityos.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/HashMap.h>
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#include <AK/Tuple.h>
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#include <LibGfx/Forward.h>
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#include <LibPDF/Document.h>
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#include <LibPDF/Encoding.h>
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namespace PDF {
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class PDFFont : public RefCounted<PDFFont> {
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public:
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enum class Type {
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Type0,
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Type1,
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TrueType
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};
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// This is used both by Type 1 and TrueType fonts.
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struct CommonData {
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DeprecatedFlyString base_font_name;
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RefPtr<Gfx::Font> font;
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RefPtr<StreamObject> to_unicode;
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RefPtr<Encoding> encoding;
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HashMap<u16, u16> widths;
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u16 missing_width;
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bool is_standard_font;
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PDFErrorOr<void> load_from_dict(Document*, NonnullRefPtr<DictObject>, float font_size);
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};
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static PDFErrorOr<NonnullRefPtr<PDFFont>> create(Document*, NonnullRefPtr<DictObject>, float font_size);
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virtual ~PDFFont() = default;
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virtual float get_char_width(u16 char_code) const = 0;
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virtual void draw_glyph(Gfx::Painter& painter, Gfx::FloatPoint point, float width, u32 char_code, Color color) = 0;
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virtual bool is_standard_font() const { return m_is_standard_font; }
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virtual Type type() const = 0;
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virtual DeprecatedFlyString base_font_name() const = 0;
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protected:
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static Tuple<DeprecatedString, DeprecatedString> replacement_for_standard_latin_font(StringView);
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bool m_is_standard_font { false };
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};
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}
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