Struct RowDrain 

pub struct RowDrain<'a> {
    pub first_row: u32,
    pub rows: u32,
    pub width: u32,
    pub layout: PixelLayout,
    /* private fields */
}

A zero-copy borrow of contiguous finalized rows, yielded by a decoder’s drain_rows.

The bytes are packed in the decoder’s requested PixelLayout, width * 4 per row. Draining is a non-consuming early view: each row is yielded once (successive drain_rows calls return only newly finalized rows). The retained bytes are freed on the next push to bound memory for a pure-streaming consumer, but the decoder’s into_image still returns the complete image (re-decoding any freed rows from the buffer).

Fields

first_row: u32

0-based output-row index of the first row in this batch.

rows: u32

Number of rows in this batch.

width: u32

Image width in pixels (each row is width * 4 bytes).

layout: PixelLayout

The byte order of Self::as_bytes.

Implementations

impl<'a> RowDrain<'a>

pub const fn new( first_row: u32, rows: u32, width: u32, layout: PixelLayout, bytes: &'a [u8], ) -> Self

A view over bytes (rows * width * 4 packed bytes in layout), whose first row is output-row first_row.

impl RowDrain<'_>

pub const fn as_bytes(&self) -> &[u8]

All drained rows as one packed byte slice (rows * width * 4 bytes).

pub fn row(&self, i: u32) -> &[u8]

The i-th row of this batch as width * 4 packed bytes.

Panics

If i >= rows.

Trait Implementations

impl<'a> Clone for RowDrain<'a>

fn clone(&self) -> RowDrain<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Copy for RowDrain<'a>

impl<'a> Debug for RowDrain<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.