mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 09:49:15 +03:00
2cb0039a13
According to the CSS font matching algorithm specification, it is supposed to be executed for each glyph instead of each text run, as is currently done. This change partially implements this by having the font matching algorithm produce a list of fonts against which each glyph will be tested to find its suitable font. Now, it becomes possible to have per-glyph fallback fonts: if the needed glyph is not present in a font, we can check the subsequent fonts in the list.
55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
/*
|
|
* Copyright (c) 2023, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibGfx/FontCascadeList.h>
|
|
|
|
namespace Gfx {
|
|
|
|
void FontCascadeList::add(NonnullRefPtr<Font> font)
|
|
{
|
|
m_fonts.append({ move(font), {} });
|
|
}
|
|
|
|
void FontCascadeList::add(NonnullRefPtr<Font> font, Vector<UnicodeRange> unicode_ranges)
|
|
{
|
|
m_fonts.append({ move(font), move(unicode_ranges) });
|
|
}
|
|
|
|
void FontCascadeList::extend(FontCascadeList const& other)
|
|
{
|
|
for (auto const& font : other.m_fonts) {
|
|
m_fonts.append({ font.font->clone(), font.unicode_ranges });
|
|
}
|
|
}
|
|
|
|
Gfx::Font const& FontCascadeList::font_for_code_point(u32 code_point) const
|
|
{
|
|
for (auto const& entry : m_fonts) {
|
|
if (!entry.unicode_ranges.has_value())
|
|
return entry.font;
|
|
if (!entry.font->contains_glyph(code_point))
|
|
continue;
|
|
for (auto const& range : *entry.unicode_ranges) {
|
|
if (range.contains(code_point))
|
|
return entry.font;
|
|
}
|
|
}
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
bool FontCascadeList::equals(FontCascadeList const& other) const
|
|
{
|
|
if (m_fonts.size() != other.m_fonts.size())
|
|
return false;
|
|
for (size_t i = 0; i < m_fonts.size(); ++i) {
|
|
if (m_fonts[i].font != other.m_fonts[i].font)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
}
|