Method Image.PNG.__decode()

Method __decode

array __decode(string data)
array __decode(string data, int dontcheckcrc)

Description

Splits a PNG file into chunks.

Returns

Result is an array of arrays, or 0 if data isn't a PNG file. Each element in the array is constructed as follows.

Array
string 0	The type of the chunk, e.g. "IHDR" or "IDAT".
string 1	The actual chunk data.
bool 2	Set to 1 if the checksum is ok and dontcheckcrc isn't set.

Note

Please read about the PNG file format. Support for decoding cHRM, gAMA, sBIT, hIST, pHYs, tIME, tEXt and zTXt chunks are missing.