Struct image::jpeg::JPEGEncoder

pub struct JPEGEncoder<'a, W: 'a> { /* fields omitted */ }

The representation of a JPEG encoder

Methods

impl<'a, W: Write> JPEGEncoder<'a, W>

pub fn new(w: &mut W) -> JPEGEncoder<W>

Create a new encoder that writes its output to w

pub fn new_with_quality(w: &mut W, quality: u8) -> JPEGEncoder<W>

Create a new encoder that writes its output to w, and has the quality parameter quality with a value in the range 1-100 where 1 is the worst and 100 is the best.

pub fn set_pixel_density(&mut self, pixel_density: PixelDensity)

Set the pixel density of the images the encoder will encode. If this method is not called, then a default pixel aspect ratio of 1x1 will be applied, and no DPI information will be stored in the image.

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

Encodes the image image that has dimensions width and height and ColorType c

The Image in encoded with subsampling ratio 4:2:2

Trait Implementations

impl<'a, W: Write> ImageEncoder for JPEGEncoder<'a, 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.