Struct `StreamingDecoder`

pub struct StreamingDecoder { /* private fields */ }

PNG StreamingDecoder (low-level interface)

By default, the decoder does not verify Adler-32 checksum computation. To enable checksum verification, set it with StreamingDecoder::set_ignore_adler32 before starting decompression.

Implementations

`impl StreamingDecoder`

fn new() -> StreamingDecoder

Creates a new StreamingDecoder

Allocates the internal buffers.

fn new_with_options(decode_options: DecodeOptions) -> StreamingDecoder

fn reset(&mut self)

Resets the StreamingDecoder

fn info(&self) -> Option<&Info<'static>>

Provides access to the inner info field

fn set_ignore_text_chunk(&mut self, ignore_text_chunk: bool)

fn set_ignore_iccp_chunk(&mut self, ignore_iccp_chunk: bool)

fn ignore_adler32(&self) -> bool

Return whether the decoder is set to ignore the Adler-32 checksum.

fn set_ignore_adler32(&mut self, ignore_adler32: bool) -> bool

Set whether to compute and verify the Adler-32 checksum during decompression. Return true if the flag was successfully set.

The decoder defaults to true.

This flag cannot be modified after decompression has started until the StreamingDecoder is reset.

fn set_ignore_crc(&mut self, ignore_crc: bool)

Set whether to compute and verify the Adler-32 checksum during decompression.

The decoder defaults to false.

fn set_skip_ancillary_crc_failures(&mut self, skip_ancillary_crc_failures: bool)

Ignore ancillary chunks if CRC fails

Defaults to true

fn update(&mut self, buf: &[u8], image_data: Option<&mut UnfilterBuf<'_>>) -> Result<(usize, Decoded), DecodingError>

Low level StreamingDecoder interface.

Allows to stream partial data to the encoder. Returns a tuple containing the bytes that have been consumed from the input buffer and the current decoding result. If the decoded chunk was an image data chunk, it also appends the read data to image_data.