Bug 67998 – [chromium] line gap is added twice in SimpleFontData::platformInit

• Component: New Bugs
• Status: RESOLVED DUPLICATE

[Robin Cao]

Line gap can be added twice in certain code path, which causes layout issues for fonts with large line gap values.

Please see SimpleFontData::platformInit() in Source/WebCore/platform/graphics/chromium/SimpleFontDataLinux.cpp

[Robin Cao]

The patch will look like this:

--- a/Source/WebCore/platform/graphics/blackberry/skia/SimpleFontDataBlackBerry.cpp
+++ b/Source/WebCore/platform/graphics/blackberry/skia/SimpleFontDataBlackBerry.cpp
@@ -85,6 +85,10 @@ void SimpleFontData::platformInit()
         SkScalar height = -metrics.fAscent + metrics.fDescent + metrics.fLeading;
         m_fontMetrics.setAscent(SkScalarRound(-metrics.fAscent));
         m_fontMetrics.setDescent(SkScalarRound(height) - m_fontMetrics.ascent());
+        // leading has been added to ascent/descent, so need to reset it to zero.
+        // Otherwise, it will be added twice, which causes layout issues for fonts
+        // with large leading values.
+        metrics.fLeading = 0;
     }
 
     if (metrics.fXHeight)


If this is the right way to go, i'll upload a patch later.

[Robin Cao]

CC authors...

[Eli Fidler]

This issue is extremely complicated, but the proposed method is incorrect. See https://bugs.webkit.org/show_bug.cgi?id=83279

*** This bug has been marked as a duplicate of bug 83279 ***