Struct image::codecs::webp::encoder::WebPEncoder

pub struct WebPEncoder<W> {
    writer: W,
    quality: WebPQuality,
    chunk_buffer: Vec<u8>,
    buffer: u64,
    nbits: u8,
}

WebP Encoder.

Fields

writer: W

quality: WebPQuality

chunk_buffer: Vec<u8>

buffer: u64

nbits: u8

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.

fn write_bits(&mut self, bits: u64, nbits: u8) -> Result<()>

fn flush(&mut self) -> Result<()>

fn write_single_entry_huffman_tree(&mut self, symbol: u8) -> Result<()>

fn build_huffman_tree( &mut self, frequencies: &[u32], lengths: &mut [u8], codes: &mut [u16], length_limit: u8 ) -> bool

fn write_huffman_tree( &mut self, frequencies: &[u32], lengths: &mut [u8], codes: &mut [u16] ) -> Result<()>

fn length_to_symbol(len: u16) -> (u16, u8)

fn count_run( pixel: &[u8], it: &mut Peekable<ChunksExact<'_, u8>>, frequencies1: &mut [u32; 280] )

fn write_run( &mut self, pixel: &[u8], it: &mut Peekable<ChunksExact<'_, u8>>, codes1: &[u16; 280], lengths1: &[u8; 280] ) -> Result<()>

fn encode_lossless( self, data: &[u8], width: u32, height: u32, color: ColorType ) -> ImageResult<()>

pub fn encode( self, data: &[u8], width: u32, height: u32, color: ColorType ) -> 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: ColorType ) -> ImageResult<()>

Writes all the bytes in an image to the encoder.