Struct image::codecs::png::ApngDecoder

pub struct ApngDecoder<R: Read> {
    inner: PngDecoder<R>,
    current: Option<RgbaImage>,
    previous: Option<RgbaImage>,
    dispose: DisposeOp,
    remaining: u32,
    has_thumbnail: bool,
}

An AnimationDecoder adapter of PngDecoder.

See PngDecoder::apng for more information.

Fields

inner: PngDecoder<R>

current: Option<RgbaImage>

The current output buffer.

previous: Option<RgbaImage>

The previous output buffer, used for dispose op previous.

dispose: DisposeOp

The dispose op of the current frame.

remaining: u32

The number of image still expected to be able to load.

has_thumbnail: bool

The next (first) image is the thumbnail.

Implementations

impl<R: Read> ApngDecoder<R>

fn new(inner: PngDecoder<R>) -> Self

fn mix_next_frame(&mut self) -> Result<Option<&RgbaImage>, ImageError>

Decode one subframe and overlay it on the canvas.

fn animatable_color_type(&self) -> Result<(), ImageError>

Trait Implementations

impl<'a, R: Read + 'a> AnimationDecoder<'a> for ApngDecoder<R>

fn into_frames(self) -> Frames<'a>

Consume the decoder producing a series of frames.