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LibGfx: Move other font-related files to LibGfx/Font/
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131 changed files with 177 additions and 176 deletions
166
Userland/Libraries/LibGfx/Font/Font.h
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166
Userland/Libraries/LibGfx/Font/Font.h
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/*
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* Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@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/Bitmap.h>
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#include <AK/ByteReader.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <LibCore/MappedFile.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Size.h>
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namespace Gfx {
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// FIXME: Make a MutableGlyphBitmap buddy class for FontEditor instead?
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class GlyphBitmap {
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public:
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GlyphBitmap() = default;
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GlyphBitmap(u8 const* rows, size_t start_index, IntSize size)
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: m_rows(rows)
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, m_start_index(start_index)
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, m_size(size)
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{
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}
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unsigned row(unsigned index) const { return ByteReader::load32(bitmap(index).data()); }
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bool bit_at(int x, int y) const { return bitmap(y).get(x); }
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void set_bit_at(int x, int y, bool b) { bitmap(y).set(x, b); }
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IntSize size() const { return m_size; }
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int width() const { return m_size.width(); }
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int height() const { return m_size.height(); }
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static constexpr size_t bytes_per_row() { return sizeof(u32); }
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static constexpr int max_width() { return bytes_per_row() * 8; }
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static constexpr int max_height() { return max_width() + bytes_per_row(); }
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private:
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AK::Bitmap bitmap(size_t y) const
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{
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return { const_cast<u8*>(m_rows) + bytes_per_row() * (m_start_index + y), bytes_per_row() * 8 };
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}
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u8 const* m_rows { nullptr };
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size_t m_start_index { 0 };
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IntSize m_size { 0, 0 };
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};
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class Glyph {
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public:
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Glyph(GlyphBitmap const& glyph_bitmap, int left_bearing, int advance, int ascent)
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: m_glyph_bitmap(glyph_bitmap)
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, m_left_bearing(left_bearing)
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, m_advance(advance)
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, m_ascent(ascent)
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{
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}
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Glyph(RefPtr<Bitmap> bitmap, int left_bearing, int advance, int ascent)
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: m_bitmap(bitmap)
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, m_left_bearing(left_bearing)
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, m_advance(advance)
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, m_ascent(ascent)
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{
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}
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bool is_glyph_bitmap() const { return !m_bitmap; }
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GlyphBitmap glyph_bitmap() const { return m_glyph_bitmap; }
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RefPtr<Bitmap> bitmap() const { return m_bitmap; }
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int left_bearing() const { return m_left_bearing; }
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int advance() const { return m_advance; }
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int ascent() const { return m_ascent; }
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private:
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GlyphBitmap m_glyph_bitmap;
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RefPtr<Bitmap> m_bitmap;
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int m_left_bearing;
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int m_advance;
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int m_ascent;
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};
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struct FontPixelMetrics {
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float size { 0 };
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float x_height { 0 };
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float advance_of_ascii_zero { 0 };
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float glyph_spacing { 0 };
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// Number of pixels the font extends above the baseline.
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float ascent { 0 };
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// Number of pixels the font descends below the baseline.
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float descent { 0 };
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// Line gap specified by font.
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float line_gap { 0 };
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float line_spacing() const { return roundf(ascent) + roundf(descent) + roundf(line_gap); }
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};
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class Font : public RefCounted<Font> {
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public:
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enum class AllowInexactSizeMatch {
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No,
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Yes,
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};
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virtual NonnullRefPtr<Font> clone() const = 0;
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virtual ~Font() {};
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virtual FontPixelMetrics pixel_metrics() const = 0;
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virtual u8 presentation_size() const = 0;
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virtual int pixel_size() const = 0;
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virtual float point_size() const = 0;
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virtual u8 slope() const = 0;
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virtual u16 weight() const = 0;
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virtual Glyph glyph(u32 code_point) const = 0;
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virtual bool contains_glyph(u32 code_point) const = 0;
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virtual u8 glyph_width(u32 code_point) const = 0;
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virtual int glyph_or_emoji_width(u32 code_point) const = 0;
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virtual float glyphs_horizontal_kerning(u32 left_code_point, u32 right_code_point) const = 0;
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virtual u8 glyph_height() const = 0;
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virtual int x_height() const = 0;
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virtual int preferred_line_height() const = 0;
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virtual u8 min_glyph_width() const = 0;
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virtual u8 max_glyph_width() const = 0;
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virtual u8 glyph_fixed_width() const = 0;
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virtual u8 baseline() const = 0;
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virtual u8 mean_line() const = 0;
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virtual int width(StringView) const = 0;
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virtual int width(Utf8View const&) const = 0;
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virtual int width(Utf32View const&) const = 0;
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virtual String name() const = 0;
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virtual bool is_fixed_width() const = 0;
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virtual u8 glyph_spacing() const = 0;
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virtual size_t glyph_count() const = 0;
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virtual String family() const = 0;
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virtual String variant() const = 0;
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virtual String qualified_name() const = 0;
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virtual String human_readable_name() const = 0;
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Font const& bold_variant() const;
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private:
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mutable RefPtr<Gfx::Font> m_bold_variant;
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};
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}
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