| SetAlpha Function | ||
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Sets a constant alpha value (0-255) for this image.
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Syntax
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[C#]
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Params
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Notes
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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.
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Example
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Here we add an image without transparency and then, at a position down and to the right, with 50% transparency.
using var doc = new Doc();
doc.Rect.Pin = XRect.Corner.TopLeft;
doc.Rect.Magnify(0.5, 0.5);
string path = Server.MapPath("../mypics/mypic.jpg");
doc.AddImageFile(path, 1);
doc.Rect.Move(doc.Rect.Width, -doc.Rect.Height);
int i = doc.AddImageFile(path, 1);
var im = (ImageLayer)doc.ObjectSoup[i];
im.PixMap.SetAlpha(128);
doc.Save(Server.MapPath("pixmapsetalpha.pdf"));
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