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# image-webp
[](https://crates.io/crates/image-webp)
[](https://docs.rs/image-webp)
[](https://github.com/image-rs/image-webp/actions)
This crate is an independent implementation of the WebP image format, written so
that the `image` crate can have a pure-Rust WebP backend for both encoding and
decoding.
## Current Status
* **Decoder:** Supports all WebP format features including both lossless and
lossy compression, alpha channel, and animation. Both the "simple" and
"extended" formats are handled, and it exposes methods to extract ICC, EXIF,
and XMP chunks. Decoding speed is generally in the range of **70-100%** of the
speed of libwebp.
* **Encoder:** This crate only supports lossless encoding. The encoder
implementation is relatively basic which makes it very fast, but it doesn't
get as good compression ratios as libwebp can. Nonetheless, it often produces
smaller files than PNG, even when compared against the slowest/highest
compression options of PNG encoders.
## Future possibilities
* We continue to be interested in **optimizations** and **bug fixes** and hope
the bring the decoder closer to parity with libwebp.
* Another potential area is **animation encoding**. Much of the groundwork is in
place for this, but it will require some additional work to implement.
* We would like to add **lossy encoding** support, but this is a non-trivial
task and would require a lot of work. If you are interested in helping with
this, please get in touch!
## Unsafe code
Both this crate and all of its dependencies currently contain no unsafe code.
NOTE: This isn't a guarantee that unsafe code will never be added. It may prove
necessary in the future to improve performance, but we will always strive to
minimize the use of unsafe code and ensure that it is well-tested and
documented.
```
$ cargo geiger
Metric output format: x/y
x = unsafe code used by the build
y = total unsafe code found in the crate
Symbols:
🔒 = No `unsafe` usage found, declares #![forbid(unsafe_code)]
❓ = No `unsafe` usage found, missing #![forbid(unsafe_code)]
☢️ = `unsafe` usage found
Functions Expressions Impls Traits Methods Dependency
0/0 0/0 0/0 0/0 0/0 🔒 image-webp 0.2.3
0/0 0/0 0/0 0/0 0/0 🔒 ├── byteorder-lite 0.1.0
0/0 0/0 0/0 0/0 0/0 ❓ └── quick-error 2.0.1
0/0 0/0 0/0 0/0 0/0
```
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