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Drawing text hangs - FormattedText bug?

Posted By:      Posted Date: September 19, 2010    Points: 0   Category :.NET Framework

A customer has reported that our software hangs when he runs it on one of his computers. We narrowed down the problem to rendering text with FormattedText and put together a simple application for him to try, which just renders some text with different font parameters - this would hang too.

Here's the bit of code which does the actual text drawing:

Typeface typeface = new Typeface(m_Font, m_FontStyle, m_FontWeight, FontStretches.Normal);
FormattedText ftext = new FormattedText(m_Text, new CultureInfo("en-US"), FlowDirection.LeftToRight, typeface, m_FontSize, m_FontColor);

ftext.TextAlignment = CenterText ? TextAlignment.Center : TextAlignment.Left;

if (m_DrawOutline)
  Geometry geom = ftext.BuildGeometry(CenterText ? new Point(ftext.Width, 0) : new Point());
  dc.DrawGeometry(m_FontColor, DrawOutline ? new Pen(m_OutlineColor, m_OutlineWidth) : null, geom);
  dc.DrawText(ftext, CenterText ? new Point(ftext.Width, 0) :  

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