Texture Cache

A LRU texture cache for caching many small textures in a single big texture, which is stored in GPU. This is used to cache textures that are rendered at runtime and change constantly, like glyph text rendering.

This is basically a generic implementation of glyph_brush_draw_cache, excluding the rendering part and letting you to hook your own rendering.

Usage

Create a LruTextureCache and add rects by passing mutable slice of RectEntry to the method cache_rects. A stored Rect can be queried from the cache by passing it key to the method get_rect. Rect and RectEntry can contain arbitrary data that could be useful for rendering from/to the texture cache.

After passing the slice to cache_rects, it will be reorder so that it start with every rect that was added to the cache.

use texture_cache::{LruTextureCache, RectEntry};

let mut rects = vec![RectEntry { width: 20, height: 20, key: "my_rect", value: (), entry_data: ()}];
let mut cache = LruTextureCache::new(256, 256);
let result = cache.cache_rects(&mut rects)?;

for rect in rects[0..result.len()] {
    let cached_rect = cache.get_rect(&rect.key);
    // Draw the rect to the texture cache...
}

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.