haikuwebkit/LayoutTests/fast/text/multi-code-unit-simple-path...

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Supplementary code points (U+10000 - U+10FFFF) are not shaped correctly in the fast text codepath https://bugs.webkit.org/show_bug.cgi?id=221356 <rdar://problem/72555297> Reviewed by Zalan Bujtas. Source/WebCore: Supplementary code points are represented in UTF-16 as two adjacent (surrogate) code units. When we map code points to glyphs, we were originally mapping these two code units to a single glyph. However, shaping routines require that the number of code units and glyphs be equal, by injecting a 0 glyph for the trailing surrogate. Luckily, we don't actually have to delete these extra 0 glyphs, because the shaping engine will do that for us. Test: fast/text/multi-code-unit-simple-path.html * platform/graphics/WidthIterator.cpp: (WebCore::WidthIterator::advanceInternal): LayoutTests: * fast/text/multi-code-unit-simple-path-expected-mismatch.html: Added. * fast/text/multi-code-unit-simple-path.html: Added. Canonical link: https://commits.webkit.org/233707@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@272379 268f45cc-cd09-0410-ab3c-d52691b4dbfc 2021-02-04 21:28:25 +00:00			`<!DOCTYPE html>`
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