PremultiplyAlpha Property

Summary

Enables or disables automatic handling of premultiplied alpha channel values when using Silverlight WriteableBitmap.

Syntax

Java

Objective-C

WinRT C#

C++

public bool PremultiplyAlpha { get; set; }

Public Property PremultiplyAlpha As Boolean

public bool PremultiplyAlpha {get; set;}

@property (nonatomic, assign) BOOL premultiplyAlpha

public boolean getPremultiplyAlpha() 
public void setPremultiplyAlpha(boolean value)

 <br/>get_PremultiplyAlpha();<br/>set_PremultiplyAlpha(value);<br/>Object.defineProperty('PremultiplyAlpha');

public: 
property bool PremultiplyAlpha { 
   bool get(); 
   void set (    bool ); 
}

Property Value

true to allow LEADTOOLS to automatically handle premultiplied alpha channel values; false, otherwise.

Remarks

This property only applies to 32-bit images. This property only has an effect when using WriteableBitmap for memory storage of the image data.

When this property is set to True, LEADTOOLS will automatically do the required conversions to store premultipled alpha values into the WriteableBitmap. If you are dealing with 32-bit images that do not have meaningful alpha channel values, you should simply set this property to false.

Setting this property to True will slow down image processing functions. You should only use this if you know your images have meaningful alpha channel values.

Requirements

Target Platforms