======
Header
======

ANKITEX1
width
height
depth
texture type  2D | cube | 3D | 2DArray
color_format  RGB8 | RGBA8
compression_formats  RAW & ETC2 & S3TC
normal
miplevels


===========
Data layout
===========

- Format A
	- Level 0
		- Depth 0 or face 0
		- Depth N or face N
	- Level N
- Format B


================
Helper functions
================

PtrSize getDataSectionSize()

Get The size of all the texture data. header+data_section_size == file_size


PtrSize getCompressedFormatSize(format)

Get the size of the a compressed format


UVec2 getLevelSize(width, height, level)


UVec2 getSurfaceSize(data_compression, level);

Given a data compression format and the level get the size that the data should 
be

=============
Sanity checks
=============

- Compressed format and no mipmap should issue a warning
- Get the total size of the file, sub the header, calculate the size and check 
  if they match