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LibGfx: Cache vector fonts by family name

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Instead of just keeping them in an unsorted Vector, which led to
increasingly noticeable O(n) lookups, we now cache a list of Typefaces
per family name.
This commit is contained in:
Andreas Kling 2022-09-15 12:03:41 +02:00
parent a192095594
commit 4910cc1879
Notes: sideshowbarker 2024-07-17 23:07:41 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/4910cc1879
1 changed files with 22 additions and 11 deletions
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33
Userland/Libraries/LibGfx/Font/FontDatabase.cpp
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@ -119,7 +119,7 @@ Font& FontDatabase::default_fixed_width_font()
struct FontDatabase::Private {
HashMap<String, NonnullRefPtr<Gfx::Font>> full_name_to_font_map;
Vector<RefPtr<Typeface>> typefaces;
HashMap<FlyString, Vector<NonnullRefPtr<Typeface>>> typefaces;
};
void FontDatabase::load_all_fonts_from_path(String const& root)
@ -217,8 +217,11 @@ RefPtr<Gfx::Font> FontDatabase::get_by_name(StringView name)
RefPtr<Gfx::Font> FontDatabase::get(FlyString const& family, float point_size, unsigned weight, unsigned slope, Font::AllowInexactSizeMatch allow_inexact_size_match)
{
for (auto typeface : m_private->typefaces) {
if (typeface->family() == family && typeface->weight() == weight && typeface->slope() == slope)
auto it = m_private->typefaces.find(family);
if (it == m_private->typefaces.end())
return nullptr;
for (auto const& typeface : it->value) {
if (typeface->weight() == weight && typeface->slope() == slope)
return typeface->get_font(point_size, allow_inexact_size_match);
}
return nullptr;
@ -226,8 +229,11 @@ RefPtr<Gfx::Font> FontDatabase::get(FlyString const& family, float point_size, u
RefPtr<Gfx::Font> FontDatabase::get(FlyString const& family, FlyString const& variant, float point_size, Font::AllowInexactSizeMatch allow_inexact_size_match)
{
for (auto typeface : m_private->typefaces) {
if (typeface->family() == family && typeface->variant() == variant)
auto it = m_private->typefaces.find(family);
if (it == m_private->typefaces.end())
return nullptr;
for (auto const& typeface : it->value) {
if (typeface->variant() == variant)
return typeface->get_font(point_size, allow_inexact_size_match);
}
return nullptr;
@ -235,19 +241,24 @@ RefPtr<Gfx::Font> FontDatabase::get(FlyString const& family, FlyString const& va
RefPtr<Typeface> FontDatabase::get_or_create_typeface(String const& family, String const& variant)
{
for (auto typeface : m_private->typefaces) {
if (typeface->family() == family && typeface->variant() == variant)
return typeface;
auto it = m_private->typefaces.find(family);
if (it != m_private->typefaces.end()) {
for (auto const& typeface : it->value) {
if (typeface->variant() == variant)
return typeface;
}
}
auto typeface = adopt_ref(*new Typeface(family, variant));
m_private->typefaces.append(typeface);
m_private->typefaces.ensure(family).append(typeface);
return typeface;
}
void FontDatabase::for_each_typeface(Function<void(Typeface const&)> callback)
{
for (auto typeface : m_private->typefaces) {
callback(*typeface);
for (auto const& it : m_private->typefaces) {
for (auto const& jt : it.value) {
callback(*jt);
}
}
}