Struct image::pnm::PNMDecoder

pub struct PNMDecoder<R> { /* fields omitted */ }

PNM decoder

Methods

impl<R: Read> PNMDecoder<R>

pub fn new(read: R) -> ImageResult<PNMDecoder<R>>

Create a new decoder that decodes from the stream r

impl<R: Read> PNMDecoder<R>

pub fn subtype(&self) -> PNMSubtype

Get the pnm subtype, depending on the magic constant contained in the header

pub fn encoding(&self) -> SampleEncoding

Whether samples are stored as binary or as decimal ascii

Trait Implementations

impl<R: Read> ImageDecoder for PNMDecoder<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