Struct WebPDecoder 

pub struct WebPDecoder { /* private fields */ }

Decodes a WebP stream.

Implementations

impl WebPDecoder

pub fn new<S: Source>(source: S, limits: Limits) -> Result<Self>

Read the container and decode the image.

This decodes eagerly: chunks may come in any order the container allows, and neither bitstream yields finished rows from a prefix of the file without the decoder holding its whole working state.

Errors

Returns PixelsError::Malformed for a stream the wrapped decoder rejects, PixelsError::Unsupported for a WebP feature it does not implement, or PixelsError::LimitExceeded if the image exceeds limits.

Trait Implementations

impl Debug for WebPDecoder

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

Formats the value using the given formatter.

impl Decoder for WebPDecoder

fn descriptor(&self) -> ImageDescriptor

The shape of the image, known after the header is parsed.

fn orientation(&self) -> Orientation

How the stored image must be turned to display upright, as its metadata declares.

fn icc_profile(&self) -> Option<&[u8]>

The embedded ICC colour profile, if the file carries one.

fn animation(&self) -> Option<Animation>

The source’s animation, if it has more than one frame.

fn capability(&self) -> DecodeCapability

What this decoder can produce without a full decode.

fn read_row(&mut self, out: &mut [u8]) -> Result<()>

Decode the next row, top to bottom, into out.

fn read_region( &mut self, region: Region, out: &mut TileMut<'_>, ) -> Result<(), PixelsError>

Decode an arbitrary region into out.

fn reduced_descriptor(&self, target: (u32, u32)) -> Option<ImageDescriptor>

What this decoder would produce if asked for target or larger, when the format lets it reach that size more cheaply than a full decode.

fn reduce_to(&mut self, descriptor: ImageDescriptor) -> Result<(), PixelsError>

Commit to producing descriptor, which Decoder::reduced_descriptor must have returned.