Extracted from Pike v7.8 release 866 at 2016-11-06.
pike.ida.liu.se
[Top]
Image
Image.PNG

Methods
 __decode()
 _chunk()
 _decode()
 decode()
 decode_alpha()
 decode_header()
 encode()
previousImage.PNG.decode()
Image.PNG.decode_header()next

Method Image.PNG.decode_alpha()

Method decode_alpha

Image.Image 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.