Struct image::codecs::bmp::BmpDecoder

pub struct BmpDecoder<R> { /* private fields */ }

A bmp decoder

Implementations

impl<R: Read + Seek> BmpDecoder<R>

pub fn new(reader: R) -> ImageResult<BmpDecoder<R>>

Create a new decoder that decodes from the stream r

Trait Implementations

impl<'a, R: 'a + Read + Seek> ImageDecoder<'a> for BmpDecoder<R>

type Reader = BmpReader<R>

The type of reader produced by into_reader.

fn dimensions(&self) -> (u32, u32)

Returns a tuple containing the width and height of the image

fn color_type(&self) -> ColorType

Returns the color type of the image data produced by this decoder

fn into_reader(self) -> ImageResult<Self::Reader>

Returns a reader that can be used to obtain the bytes of the image. For the best performance, always try to read at least scanline_bytes from the reader at a time. Reading fewer bytes will cause the reader to perform internal buffering.

fn read_image(self, buf: &mut [u8]) -> ImageResult<()>

Returns all the bytes in the image.

fn original_color_type(&self) -> ExtendedColorType

Retuns the color type of the image file before decoding

fn total_bytes(&self) -> u64

Returns the total number of bytes in the decoded image.

fn scanline_bytes(&self) -> u64

Returns the minimum number of bytes that can be efficiently read from this decoder. This may be as few as 1 or as many as total_bytes().

fn read_image_with_progress<F: Fn(Progress)>(
    self,
    buf: &mut [u8],
    progress_callback: F
) -> ImageResult<()>

Same as read_image but periodically calls the provided callback to give updates on loading progress.

impl<'a, R: 'a + Read + Seek> ImageDecoderExt<'a> for BmpDecoder<R>

fn read_rect_with_progress<F: Fn(Progress)>(
    &mut self,
    x: u32,
    y: u32,
    width: u32,
    height: u32,
    buf: &mut [u8],
    progress_callback: F
) -> ImageResult<()>

Decode a rectangular section of the image, periodically reporting progress.

fn read_rect(
    &mut self,
    x: u32,
    y: u32,
    width: u32,
    height: u32,
    buf: &mut [u8]
) -> ImageResult<()>

Decode a rectangular section of the image; see read_rect_with_progress().