libpng: libpng (Portable Network Graphics library)
libpng:
libpng: PNG (Portable Network Graphics) is an extensible file format for the
libpng: lossless, portable, well-compressed storage of raster images.  PNG
libpng: provides a patent-free replacement for GIF and can also replace many
libpng: common uses of TIFF.  Indexed-color, grayscale, and truecolor images
libpng: are supported, plus an optional alpha channel.  Sample depths range
libpng: from 1 to 16 bits.
libpng:
libpng:
libpng: