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VIEW_OBJECT_ALPHA_MODE enumeration

  • Article

Specifies how the alpha value for a bitmap or render target should be treated in the buffer.

Syntax

typedef enum _VIEW_OBJECT_ALPHA_MODE { 
  VIEW_OBJECT_ALPHA_MODE_IGNORE         = 0,
  VIEW_OBJECT_ALPHA_MODE_PREMULTIPLIED  = 1,
  VIEW_OBJECT_ALPHA_MODE_Max            = 2147483647L
} VIEW_OBJECT_ALPHA_MODE;

Constants

  • VIEW_OBJECT_ALPHA_MODE_IGNORE
    The alpha value is ignored.

  • VIEW_OBJECT_ALPHA_MODE_PREMULTIPLIED
    Each color channel is scaled by the alpha value. Typically, no color channel value is greater than the alpha channel value. If a color channel value in a pre-multiplied format is greater than the alpha channel, the standard source-over blending math creates an additive blend.

  • VIEW_OBJECT_ALPHA_MODE_Max
    Reserved

Requirements

Minimum supported client

Windows Vista with SP1, Windows 7

Minimum supported server

Windows Server 2008 R2

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