Struct image::jpeg::JPEGDecoder

pub struct JPEGDecoder<R> {
    // some fields omitted
}

[−] Expand description

JPEG decoder

Methods

impl<R: Read> JPEGDecoder<R>

fn new(r: R) -> JPEGDecoder<R>[−]

Create a new decoder that decodes from the stream r

Trait Implementations

impl<R: Read> ImageDecoder for JPEGDecoder<R>

fn dimensions(&mut self) -> ImageResult<(u32, u32)>[−]

Returns a tuple containing the width and height of the image

fn colortype(&mut self) -> ImageResult<ColorType>[−]

Returns the color type of the image e.g. RGB(8) (8bit RGB)

fn row_len(&mut self) -> ImageResult<usize>[−]

Returns the length in bytes of one decoded row of the image

fn read_scanline(&mut self, _buf: &mut [u8]) -> ImageResult<u32>[−]

Reads one row from the image into buf and returns the row index

fn read_image(&mut self) -> ImageResult<DecodingResult>[−]

Decodes the entire image and return it as a Vector

fn is_animated(&mut self) -> ImageResult<bool>[−]

Returns true if the image is animated

fn into_frames(self) -> ImageResult<Frames>[−]

Returns the frames of the image

fn load_rect(&mut self, x: u32, y: u32, length: u32, width: u32) -> ImageResult<Vec<u8>>[−]

Decodes a specific region of the image, represented by the rectangle starting from x and y and having length and width