[Webkit-unassigned] [Bug 161493] [FreeType] Incorrect application of glyph positioning in the Y direction

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=161493

--- Comment #13 from Myles C. Maxfield <mmaxfield at apple.com> ---
Comment on attachment 287860
  --> https://bugs.webkit.org/attachment.cgi?id=287860
Proof of concept patch

View in context: https://bugs.webkit.org/attachment.cgi?id=287860&action=review

> Source/WebCore/platform/graphics/harfbuzz/HarfBuzzShaper.cpp:580
> +                glyphBuffer->add(glyphs[i], currentRun->fontData(), createGlyphBufferAdvance(glyphAdvanceX, glyphAdvanceY), currentCharacterIndex, &offset);

It appears that FontCascade::drawGlyphBuffer() doesn't actually move any glyphs according to the offsets. How does this work?

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