57103da08d
Previously, font selection ignored the Unicode emoji presentation of a code point. Emoji-capable code points were always resolved through pre-baked color emoji and symbol fonts. Text-default code points which lacked the `Emoji_Presentation` property, were therefore rendered as color emoji rather than text. We now classify each code point's default presentation from its `Emoji_Presentation` property and any trailing variation selector.
78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/FlyString.h>
|
|
#include <AK/Function.h>
|
|
#include <AK/HashFunctions.h>
|
|
#include <AK/OwnPtr.h>
|
|
#include <AK/RefPtr.h>
|
|
#include <LibGfx/Font/Typeface.h>
|
|
#include <LibGfx/Forward.h>
|
|
|
|
namespace Gfx {
|
|
|
|
struct CodePointFallbackKey {
|
|
u32 code_point { 0 };
|
|
u16 weight { 0 };
|
|
u16 width { 0 };
|
|
u8 slope { 0 };
|
|
bool prefer_color_emoji { false };
|
|
|
|
bool operator==(CodePointFallbackKey const&) const = default;
|
|
|
|
unsigned hash() const
|
|
{
|
|
return pair_int_hash(
|
|
pair_int_hash(code_point, weight),
|
|
pair_int_hash(pair_int_hash(width, slope), prefer_color_emoji));
|
|
}
|
|
};
|
|
|
|
class SystemFontProvider {
|
|
public:
|
|
virtual ~SystemFontProvider();
|
|
|
|
virtual StringView name() const = 0;
|
|
virtual RefPtr<Gfx::Font> get_font(FlyString const& family, float point_size, unsigned weight, unsigned width, unsigned slope, Optional<FontVariationSettings> const& font_variation_settings = {}, Optional<Gfx::ShapeFeatures> const& shape_features = {}) = 0;
|
|
virtual void for_each_typeface_with_family_name(FlyString const& family_name, Function<void(Typeface const&)>) = 0;
|
|
};
|
|
|
|
class FontDatabase {
|
|
public:
|
|
static FontDatabase& the();
|
|
SystemFontProvider& install_system_font_provider(NonnullOwnPtr<SystemFontProvider>);
|
|
|
|
RefPtr<Gfx::Font> get(FlyString const& family, float point_size, unsigned weight, unsigned width, unsigned slope, Optional<FontVariationSettings> const& font_variation_settings = {}, Optional<Gfx::ShapeFeatures> const& shape_features = {});
|
|
RefPtr<Gfx::Font> get_font_for_code_point(u32 code_point, float point_size, u16 weight, u16 width, u8 slope, bool prefer_color_emoji);
|
|
void for_each_typeface_with_family_name(FlyString const& family_name, Function<void(Typeface const&)>);
|
|
[[nodiscard]] StringView system_font_provider_name() const;
|
|
|
|
static ErrorOr<Vector<String>> font_directories();
|
|
|
|
private:
|
|
FontDatabase();
|
|
~FontDatabase() = default;
|
|
|
|
OwnPtr<SystemFontProvider> m_system_font_provider;
|
|
|
|
struct CodePointFallbackEntry {
|
|
FlyString family_name;
|
|
RefPtr<Typeface const> typeface;
|
|
};
|
|
HashMap<CodePointFallbackKey, CodePointFallbackEntry> m_code_point_fallback_cache;
|
|
};
|
|
|
|
}
|
|
|
|
template<>
|
|
struct AK::Traits<Gfx::CodePointFallbackKey> : public AK::DefaultTraits<Gfx::CodePointFallbackKey> {
|
|
static unsigned hash(Gfx::CodePointFallbackKey const& key)
|
|
{
|
|
return key.hash();
|
|
}
|
|
};
|