bindgen'd FFI bindings to libwebp.
libwebp is built with the cc crate. It needs a C compiler, but cmake is not used.
Set TARGET_CPU env var to native or your desired CPU architecture to optimize the C code for it.
Add the following to the Cargo.toml in your project:
toml
[dependencies]
libwebp-sys = "0.7"
or to require newer CPUs with SIMD support:
toml
[dependencies]
libwebp-sys = { version = "0.7", features = ["avx2", "sse41", "neon"] }
rust
pub fn encode_webp(input_image: &[u8], width: u32, height: u32, quality: i32) -> Result<Vec<u8>> {
unsafe {
let mut out_buf = std::ptr::null_mut();
let stride = width as i32 * 4;
let len = WebPEncodeRGBA(input_image.as_ptr(), width as i32, height as i32, stride, quality as f32, &mut out_buf);
Ok(std::slice::from_raw_parts(out_buf, len as usize).into())
}
}
rust
pub fn decode_webp(buf: &[u8]) -> Result<Vec<u8>> {
let mut width = 0;
let mut height = 0;
let len = buf.len();
unsafe {
WebPGetInfo(buf.as_ptr(), len, &mut width, &mut height);
let out_buf = WebPDecodeRGBA(buf.as_ptr(), len, &mut width, &mut height);
}
Ok(std::slice::::from_raw_parts(out_buf, width * height * 4).into())
}