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glyphrun-computeinkboundingbox-and-formattedtext-extent-return-different-values-beginning-in-dotnet-4-5.md

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GlyphRun.ComputeInkBoundingBox() and FormattedText.Extent return different values beginning in .NET Framework 4.5

Scope

Edge

Version Introduced

4.5

Source Analyzer Status

Available

Change Description

Improvements were made to xref:System.Windows.Media.GlyphRun.ComputeInkBoundingBox and xref:System.Windows.Media.FormattedText.Extent in the .NET Framework 4.5 to address issues where the boxes were too small for the contained glyphs in some cases in the .NET Framework 4.0. As a result of this, some bounding boxes will be larger beginning in the .NET Framework 4.5, resulting in subtle differences in UI layout.

  • Quirked
  • Build-time break

Recommended Action

Be aware that some glyph bounding box sizes have increased. These changes will usually improve presentation and hit box testing, but if the older (pre-.NET 4.5) behavior is desired, it can be opted into by adding the following entry to the app.config file:

<appsettings>
	<add key="IncludeAllInkInBoundingBox" value="false">
</appsettings>

Affected APIs

  • M:System.Windows.Media.GlyphRun.ComputeInkBoundingBox
  • P:System.Windows.Media.FormattedText.Extent

Category

Windows Presentation Foundation (WPF)

More information