Extracted from Pike v7.6 release 112 at 2008-06-24.
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Image.PNG

Method Image.PNG.decode_alpha()


Method decode_alpha

Image.Image Image.PNG.decode_alpha(string data, void|mapping(string:mixed) options)

Description

Decodes the alpha channel in a PNG file. The options mapping is the same as for _decode .

Throws

Throws upon error in data.