Struct JpegTileEncoder 

pub struct JpegTileEncoder {}

JPEG tile encoder for decoding and re-encoding tiles.

This encoder takes raw JPEG data from slide tiles, decodes it to pixels, and re-encodes it at the requested quality level.

Example

use wsi_streamer::tile::JpegTileEncoder;
use bytes::Bytes;

let encoder = JpegTileEncoder::new();

// Source JPEG data from slide
let source_jpeg: Bytes = /* ... */;

// Re-encode at quality 85
let output = encoder.encode(&source_jpeg, 85)?;

Implementations

impl JpegTileEncoder

pub fn new() -> Self

Create a new JPEG tile encoder.

pub fn encode(&self, source: &[u8], quality: u8) -> Result<Bytes, TileError>

Decode source tile and re-encode at the specified quality.

This method auto-detects the source format (JPEG or JPEG 2000) and decodes accordingly. Output is always JPEG.

Arguments

• source - Raw tile data (JPEG or JPEG 2000)
• quality - Output JPEG quality (1-100)

Returns

Encoded JPEG data at the requested quality.

Errors

Returns an error if:

• The source data format is not recognized
• Decoding fails
• Encoding fails

pub fn encode_default(&self, source: &[u8]) -> Result<Bytes, TileError>

Decode source JPEG and re-encode at the default quality.

This is a convenience method equivalent to encode(source, DEFAULT_JPEG_QUALITY).

pub fn dimensions(&self, source: &[u8]) -> Result<(u32, u32), TileError>

Get image dimensions without fully decoding (when possible).

This is useful for validation or metadata queries.

Note: For JPEG 2000, this currently requires a full decode.

Returns

(width, height) in pixels.

Trait Implementations

impl Clone for JpegTileEncoder

fn clone(&self) -> JpegTileEncoder

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JpegTileEncoder

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

Formats the value using the given formatter.

impl Default for JpegTileEncoder

fn default() -> JpegTileEncoder

Returns the “default value” for a type.