Alex Evans mmalex

## pngencode.cpp
// by alex evans, 2011.  released into the public domain.
// based on a first ever reading of the png spec, it occurs to me that a minimal png encoder should be quite simple.
// this is a first stab - may be buggy! the only external dependency is zlib and some basic typedefs (u32, u8)
//
// VERSION 0.02! now using zlib's crc rather than my own, and avoiding a memcpy and memory scribbler in the old one
// by passing the zero byte at the start of the scanline to zlib first, then the original scanline in place. WIN!
//
// more context at http://altdevblogaday.org/2011/04/06/a-smaller-jpg-encoder/.
//
// follow me on twitter @mmalex http://twitter.com/mmalex
	// by alex evans, 2011. released into the public domain.
	// based on a first ever reading of the png spec, it occurs to me that a minimal png encoder should be quite simple.
	// this is a first stab - may be buggy! the only external dependency is zlib and some basic typedefs (u32, u8)
	//
	// VERSION 0.02! now using zlib's crc rather than my own, and avoiding a memcpy and memory scribbler in the old one
	// by passing the zero byte at the start of the scanline to zlib first, then the original scanline in place. WIN!
	//
	// more context at http://altdevblogaday.org/2011/04/06/a-smaller-jpg-encoder/.
	//
	// follow me on twitter @mmalex http://twitter.com/mmalex