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DWRITE_TEXT_ANTIALIAS_MODE enumeration (dwrite_1.h)

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The DWRITE_TEXT_ANTIALIAS_MODE enumeration contains values that specify the type of antialiasing to use for text when the rendering mode calls for antialiasing.

Syntax

typedef enum DWRITE_TEXT_ANTIALIAS_MODE {
  DWRITE_TEXT_ANTIALIAS_MODE_CLEARTYPE,
  DWRITE_TEXT_ANTIALIAS_MODE_GRAYSCALE
} ;

Constants

 
DWRITE_TEXT_ANTIALIAS_MODE_CLEARTYPE
ClearType antialiasing computes coverage independently for the red, green, and blue color elements of each pixel. This allows for more detail than conventional antialiasing. However, because there is no one alpha value for each pixel, ClearType is not suitable for rendering text onto a transparent intermediate bitmap.
DWRITE_TEXT_ANTIALIAS_MODE_GRAYSCALE
Grayscale antialiasing computes one coverage value for each pixel. Because the alpha value of each pixel is well-defined, text can be rendered onto a transparent bitmap, which can then be composited with other content.

Note  Grayscale rendering with IDWriteBitmapRenderTarget1 uses premultiplied alpha.

 

Requirements

Requirement Value
Minimum supported client Windows 8 and Platform Update for Windows 7 [desktop apps only]
Minimum supported server Windows Server 2012 and Platform Update for Windows Server 2008 R2 [desktop apps only]
Header dwrite_1.h

See also

IDWriteBitmapRenderTarget1::GetTextAntialiasMode

IDWriteBitmapRenderTarget1::SetTextAntialiasMode