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LibWeb: Layout/Shape font-variant-* css properties

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This commit is contained in:
Johan Dahlin 2024-12-05 01:21:45 +01:00 • committed by Jelle Raaijmakers
commit 083f4f3d08
Notes: github-actions[bot] 2024-12-17 18:08:20 +00:00
8 changed files with 310 additions and 14 deletions
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25
Libraries/LibGfx/TextLayout.cpp
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@ -12,7 +12,7 @@
namespace Gfx {
RefPtr<GlyphRun> shape_text(FloatPoint baseline_start, float letter_spacing, Utf8View string, Gfx::Font const& font, GlyphRun::TextType text_type)
RefPtr<GlyphRun> shape_text(FloatPoint baseline_start, float letter_spacing, Utf8View string, Gfx::Font const& font, GlyphRun::TextType text_type, ShapeFeatures const& features)
{
hb_buffer_t* buffer = hb_buffer_create();
ScopeGuard destroy_buffer = [&]() { hb_buffer_destroy(buffer); };
@ -24,7 +24,22 @@ RefPtr<GlyphRun> shape_text(FloatPoint baseline_start, float letter_spacing, Utf
Vector<hb_glyph_info_t> const input_glyph_info({ glyph_info, glyph_count });
auto* hb_font = font.harfbuzz_font();
hb_shape(hb_font, buffer, nullptr, 0);
hb_feature_t const* hb_features_data = nullptr;
Vector<hb_feature_t> hb_features;
if (!features.is_empty()) {
hb_features.ensure_capacity(features.size());
for (auto const& feature : features) {
hb_features.append({
.tag = HB_TAG(feature.tag[0], feature.tag[1], feature.tag[2], feature.tag[3]),
.value = feature.value,
.start = 0,
.end = HB_FEATURE_GLOBAL_END,
});
}
hb_features_data = hb_features.data();
}
hb_shape(hb_font, buffer, hb_features_data, features.size());
glyph_info = hb_buffer_get_glyph_infos(buffer, &glyph_count);
auto* positions = hb_buffer_get_glyph_positions(buffer, &glyph_count);
@ -45,12 +60,14 @@ RefPtr<GlyphRun> shape_text(FloatPoint baseline_start, float letter_spacing, Utf
point.translate_by(letter_spacing, 0);
}
hb_buffer_reset(buffer);
return adopt_ref(*new Gfx::GlyphRun(move(glyph_run), font, text_type, point.x()));
}
float measure_text_width(Utf8View const& string, Gfx::Font const& font)
float measure_text_width(Utf8View const& string, Gfx::Font const& font, ShapeFeatures const& features)
{
auto glyph_run = shape_text({}, 0, string, font, GlyphRun::TextType::Common);
auto glyph_run = shape_text({}, 0, string, font, GlyphRun::TextType::Common, features);
return glyph_run->width();
}