Struct compeg::Decoder

pub struct Decoder { /* private fields */ }

A GPU JPEG decode context.

Holds all on-GPU buffers and textures needed for JPEG decoding.

Implementations

impl Decoder

pub fn new(gpu: Arc<Gpu>) -> Self

Creates a new JPEG decoding context on the given Gpu.

pub fn with_texture_usages(gpu: Arc<Gpu>, usage: TextureUsages) -> Self

pub fn texture(&self) -> &Texture

pub fn into_texture(self) -> Texture

Consumes this Decoder and returns its output Texture.

The Texture will only contain data if a decode operation has been previously started on this Decoder. Depending on what data has been decoded previously, the Texture might have larger dimensions than necessary to fit the last frame.

pub fn enqueue( &mut self, data: &ImageData<'_>, enc: &mut CommandEncoder ) -> bool

pub fn start_decode(&mut self, data: &ImageData<'_>) -> DecodeOp<'_>

Preprocesses and uploads a JPEG image, and dispatches the decoding operation on the GPU.

Returns a DecodeOp with information about the decode operation.

pub fn decode_blocking(&mut self, data: &ImageData<'_>) -> DecodeOp<'_>

Performs a blocking decode operation.

This method works identically to Decoder::start_decode, but will wait until the operation on the GPU is finished.

Note that it is not typically necessary to use this method, since wgpu will automatically insert barriers before the target texture is accessed.