Struct WebPEncoder

pub struct WebPEncoder<W> {
    inner: WebPEncoder<W>,
}

WebP Encoder.

Limitations

Right now only lossless encoding is supported.

If you need lossy encoding, you’ll have to use libwebp. Example code for encoding a DynamicImage with libwebp via the webp crate can be found here.

Compression ratio

This encoder reaches compression ratios higher than PNG at a fraction of the encoding time. However, it does not reach the full potential of lossless WebP for reducing file size.

If you need an even higher compression ratio at the cost of much slower encoding, please encode the image with libwebp as outlined above.

Fields

inner: WebPEncoder<W>

Implementations

impl<W: Write> WebPEncoder<W>

pub fn new_lossless(w: W) -> Self

Create a new encoder that writes its output to w.

Uses “VP8L” lossless encoding.

pub fn encode( self, buf: &[u8], width: u32, height: u32, color_type: ExtendedColorType, ) -> ImageResult<()>

Encode image data with the indicated color type.

The encoder requires image data be Rgb8 or Rgba8.

Panics

Panics if width * height * color.bytes_per_pixel() != data.len().

Trait Implementations

impl<W: Write> ImageEncoder for WebPEncoder<W>

fn write_image( self, buf: &[u8], width: u32, height: u32, color_type: ExtendedColorType, ) -> ImageResult<()>

Writes all the bytes in an image to the encoder.

fn set_icc_profile( &mut self, icc_profile: Vec<u8>, ) -> Result<(), UnsupportedError>

Set the ICC profile to use for the image.