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LibWeb: Disable font kerning if text-rendering is set to optimizeSpeed

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If `font-kerning` is set to `normal` and `text-rendering` is
set to `optimizeSpeed` then kerning is now disabled.
This commit is contained in:
Tim Ledbetter 2025-06-27 08:00:27 +01:00 • committed by Sam Atkins
commit b4097623e5
Notes: github-actions[bot] 2025-06-27 15:53:02 +00:00
1 changed files with 3 additions and 1 deletions
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4
Libraries/LibWeb/Layout/InlineLevelIterator.cpp
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@ -425,7 +425,9 @@ HashMap<StringView, u8> InlineLevelIterator::shape_features_map() const
// FIXME: vkrn should be enabled for vertical text.
switch (computed_values.font_kerning()) {
case CSS::FontKerning::Auto:
// FIXME: Use a heuristic to determine whether to enable kerning.
// AD-HOC: Disable kerning if font-kerning is set to normal and text rendering is set to optimize speed.
features.set("kern"sv, computed_values.text_rendering() != CSS::TextRendering::Optimizespeed ? 1 : 0);
break;
case CSS::FontKerning::Normal:
features.set("kern"sv, 1);
break;