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LibGfx: Skip old-style emoji lookup for fonts that have color bitmaps

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Ultimately, we should find a way to route all emoji access through
the font code, but for now, this patch adds a special case for fonts
that are known to have embedded color bitmaps so we can test them.
This commit is contained in:
Andreas Kling 2023-03-04 20:54:25 +01:00
parent 924d23353e
commit 552895da60
Notes: sideshowbarker 2024-07-17 11:33:34 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/552895da60
2 changed files with 6 additions and 3 deletions
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6
Userland/Libraries/LibGfx/Font/ScaledFont.cpp
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@ -107,8 +107,10 @@ float ScaledFont::glyph_width(u32 code_point) const
template<typename CodePointIterator>
static float glyph_or_emoji_width_impl(ScaledFont const& font, CodePointIterator& it)
{
if (auto const* emoji = Emoji::emoji_for_code_point_iterator(it))
return font.pixel_size() * emoji->width() / emoji->height();
if (!font.has_color_bitmaps()) {
if (auto const* emoji = Emoji::emoji_for_code_point_iterator(it))
return font.pixel_size() * emoji->width() / emoji->height();
}
return font.glyph_width(*it);
}

3
Userland/Libraries/LibGfx/Painter.cpp
View File

@ -1421,8 +1421,9 @@ void Painter::draw_glyph_or_emoji(FloatPoint point, Utf8CodePointIterator& it, F
++it;
};
// NOTE: We don't check for emoji
auto font_contains_glyph = font.contains_glyph(code_point);
auto check_for_emoji = Unicode::could_be_start_of_emoji_sequence(it, font_contains_glyph ? Unicode::SequenceType::EmojiPresentation : Unicode::SequenceType::Any);
auto check_for_emoji = !font.has_color_bitmaps() && Unicode::could_be_start_of_emoji_sequence(it, font_contains_glyph ? Unicode::SequenceType::EmojiPresentation : Unicode::SequenceType::Any);
// If the font contains the glyph, and we know it's not the start of an emoji, draw a text glyph.
if (font_contains_glyph && !check_for_emoji) {