Interface used to read a set of pixels in a KTX file
A KTX file loader KTX file format is an image container defined by the Kronos group See specs here https://www.khronos.org/opengles/sdk/tools/KTX/file_format_spec/ This loader doesn't support compressed files yet.
This class allows one to write a KTX file.
reads the pixels of an image whose origin is the top left corner
reads the pixels of an image whose origin is the bottom left corner