SetAlpha Function    

Sets a constant alpha value (0-255) for this image.

 

    

Syntax		  

[C#]
void SetAlpha(double alpha)

[Visual Basic]
Sub SetAlpha(alpha As Double)

 

    

Params		  
Name Description
alpha A constant alpha value to assign to this image.

 

    

Notes		  

Assigns a constant alpha transparency to the PixMap.

The alpha value should range from 0 (fully transparent) to 255 (fully opaque). Any values outside this range will result in the alpha channel being removed.

 

    

Example		  

Here we add an image without transparency and then, at a position down and to the right, with 50% transparency.

 

using (Doc doc = new Doc()) {   doc.Rect.Pin = XRect.Corner.TopLeft;   doc.Rect.Magnify(0.5, 0.5);   string thePath = Server.MapPath("../mypics/mypic.jpg");   doc.AddImageFile(thePath, 1);   doc.Rect.Move(doc.Rect.Width, -doc.Rect.Height);   int i = doc.AddImageFile(thePath, 1);   ImageLayer im = (ImageLayer)doc.ObjectSoup[i];   im.PixMap.SetAlpha(128);   doc.Save(Server.MapPath("pixmapsetalpha.pdf")); }


pixmapsetalpha.pdf