Struct ImageReadBuffer 

pub(crate) struct ImageReadBuffer {
    scanline_bytes: usize,
    buffer: Vec<u8>,
    consumed: usize,
    total_bytes: u64,
    offset: u64,
}

Fields

scanline_bytes: usize

buffer: Vec<u8>

consumed: usize

total_bytes: u64

offset: u64

Implementations

impl ImageReadBuffer

pub(crate) fn new(scanline_bytes: u64, total_bytes: u64) -> Self

Create a new ImageReadBuffer.

Panics if scanline_bytes doesn’t fit into a usize, because that would mean reading anything from the image would take more RAM than the entire virtual address space. In other words, actually using this struct would instantly OOM so just get it out of the way now.

pub(crate) fn read<F>( &mut self, buf: &mut [u8], read_scanline: F, ) -> Result<usize>

where F: FnMut(&mut [u8]) -> Result<usize>,