I couldn't find PNG decoder in Assembly. All of the PNG source are depend on ZLib+libpng. Isn't there PNG decoder in Assembly? Thank you for reading Have a nice day!
Good question, but there seems to be no good PNG source code on the web. Anybody who writes a DLL to do the basic things with *.png will probably get famous pretty quickly :). If it's any use, the specification is at www.w3.org/pub/WWW/TR/REC-png.html (PNG means Portable Network Graphics, a file format for the web).
I know that there's at least one PNG source package available, and most likely others, too. Just search for "libpng". This is C source, and (iirc) depends on zlib, but it should work. And I believe I've seen a .dll form somewhere or another.