tkpng: tkpng (PNG photo image support for Tcl/Tk) tkpng: tkpng: TkPNG is an open source binary package that adds PNG photo image support tkpng: to Tcl/Tk. Although other extensions such as Img also add support for tkpng: PNG images, this package was designed to be lightweight, not depending tkpng: on libpng nor implementing other image formats, and suitable for tkpng: inclusion in the Tk core. tkpng: tkpng: tkpng: tkpng: