Struct compeg::ImageData

pub struct ImageData<'a> { /* private fields */ }

A parsed JPEG image, containing all data needed for on-GPU decoding.

Implementations

impl<'a> ImageData<'a>

pub fn new(jpeg: impl Into<Cow<'a, [u8]>>) -> Result<Self, Error>

Reads ImageData from an in-memory JPEG file.

If this returns an error, it either means that the JPEG file is malformed, or that it uses features this library does not support. In either case, the application should fall back to a more fully-featured software decoder.

pub fn width(&self) -> u32

Returns the width of the image in pixels.

pub fn height(&self) -> u32

Returns the height of the image in pixels.

pub fn parallelism(&self) -> u32

Returns the total parallelism this JPEG permits.

This number indicates how many parts of the image can be processed in parallel. It is crucial for performance that this number is as high as possible. If it is below 10000, it is likely faster to use a CPU-based decoder instead.