PNG file format endianness?

Question

Im not sure if endian is the right word but..

I have been parsing through a PNG file and I have noticed that all of the integer values are in big endian. Is this tru

Answer 1

Yes, according to the specification, integers must be in network byte order (big endian):

All integers that require more than one byte shall be in network byte order: the most significant byte comes first, then the less significant bytes in descending order of significance (MSB LSB for two-byte integers, MSB B2 B1 LSB for four-byte integers). The highest bit (value 128) of a byte is numbered bit 7; the lowest bit (value 1) is numbered bit 0. Values are unsigned unless otherwise noted. Values explicitly noted as signed are represented in two's complement notation.

http://www.w3.org/TR/2003/REC-PNG-20031110/#7Integers-and-byte-order