The IDAT chunk is the primary source of image data in a png. Each line is filtered using
various filter types, optionally interlaced via Adam7 interlacing and then compressed using the
deflate algorithm. Note that a single image may contain multiple IDAT chunks, if they do they
must appear consecutively.
IDATImage DataSpec: https://www.w3.org/TR/PNG/#11IDAT
The
IDATchunk is the primary source of image data in a png. Each line is filtered using various filter types, optionally interlaced via Adam7 interlacing and then compressed using the deflate algorithm. Note that a single image may contain multiple IDAT chunks, if they do they must appear consecutively.