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# Étagère
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A dynamic texture atlas allocator using the shelf packing algorithm.
## Motivation
The ability to dynamically batch textures together is important for some graphics rendering scenarios (for example [WebRender](https://github.com/servo/webrender)).
The shelf packing algorithm works very well when there is a high number of items with similar sizes, for example for dynamic glyph atlases.
See also [guillotière](https://github.com/nical/guillotiere), another dynamic atlas allocator based on a different algorithm, with different packing and performance characteristics.
## Example
```rust
use etagere::*;
let mut atlas = AtlasAllocator::new(size2(1000, 1000));
let a = atlas.allocate(size2(100, 1000)).unwrap();
let b = atlas.allocate(size2(900, 200)).unwrap();
atlas.deallocate(a.id);
let c = atlas.allocate(size2(300, 200)).unwrap();
assert_eq!(c.rectangle, atlas.get(c.id));
atlas.deallocate(c.id);
atlas.deallocate(b.id);
```
## License
Licensed under either of
* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or https://www.apache.org/licenses/LICENSE-2.0)
at your option.