KTX v1 texture storage format parsing.
Parses byte data according to https://www.khronos.org/registry/KTX/specs/1.0/ktxspec_v1.html.
```rust // Include & use static ktx data use ktx::{Ktx, include_ktx, KtxInfo};
let image: Ktx<_> = includektx!("../tests/babg-bc3.ktx"); asserteq!(image.pixel_width(), 260); ```
```rust // Read ktx data at runtime use ktx::KtxInfo;
let decoder = ktx::Decoder::new(bufreader)?; asserteq!(decoder.pixel_width(), 260); ```
This crate is maintained with latest stable rust.