Andrew Willmott acd99728b7 ATC and ASTC support (#1410) ...

* ATC & ASTC support

- Add update format enum for bimg additions
- renderer_gl ATC and ATSC support
- renderer_mtl ASTC support
- renderer_vk ASTC support
- updates to other backends for new enums
- Support emulated ATC

* cleanup

* Add texture_compression test files for ATC/ASTC formats

* Update 'update' example for ATC formats

- Generalise tile code a little
- Add ATC variants
- Ignoring ASTC for now as not emulated -- should we add empty
  checkerboard emulate though?

2018-06-11 09:23:41 -07:00

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