Struct Transcoder 

pub struct Transcoder { /* private fields */ }

Available on crate feature multimedia only.

Transcodes images of any wide-spread types to JPEG thumbnails. Default settings generate previews similar to SimpleX-Chat previews

Implementations

impl Transcoder

pub const fn disabled() -> Self

Disable transcoding entirely. Useful for pre-made and pictures thumbnails.

pub const fn jpeg() -> Self

Only convert the image to JPEG(the best quality) without applying any other transformations. Use builder methods to add transformations on top

pub const fn thumbnail() -> Self

The default transcoder for thumbnails. Modify defaults with builder methods.

pub const fn is_enabled(&self) -> bool

pub const fn with_size(self, x: u8, y: u8) -> Self

Bound between 32x32 and 255x255

pub const fn with_quality(self, quality: u8) -> Self

Quality is bound between 1..=100 where 1 is the worst

pub const fn with_blur(self, sigma: f32) -> Self

sigma < 1.0 - no blur. sigma = 100.0 - max blur

pub fn transcode_to_jpg(self, bytes: Vec<u8>) -> Result<Vec<u8>, PreviewError>

WARNING: this is a relatively expensive blocking operation, ensure that you call this method outside the tokio executor with tokio::spawn_blocking or on a dedicated thread.

Trait Implementations

impl Clone for Transcoder

fn clone(&self) -> Transcoder

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Transcoder

impl Debug for Transcoder

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

Formats the value using the given formatter.

impl Default for Transcoder

fn default() -> Self

Returns the “default value” for a type.