Struct ScanlineEncoder 

pub struct ScanlineEncoder { /* private fields */ }

Row-by-row JPEG encoder.

Implementations

impl ScanlineEncoder

pub fn new(width: usize, height: usize, pixel_format: PixelFormat) -> Self

Create a new scanline encoder.

pub fn set_quality(&mut self, quality: u8)

Set JPEG quality factor (1-100).

pub fn set_subsampling(&mut self, subsampling: Subsampling)

Set chroma subsampling mode.

pub fn next_scanline(&self) -> usize

Returns the index of the next scanline to be written.

pub fn write_scanline(&mut self, row: &[u8]) -> Result<()>

Write one row of pixel data.

pub fn finish(self) -> Result<Vec<u8>>

Compress all accumulated scanlines into a JPEG byte stream.