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

pub fn new() -> StreamingDecoder

Creates a new StreamingDecoder

Allocates the internal buffers.

pub fn new_with_options(decode_options: DecodeOptions) -> StreamingDecoder

pub fn reset(&mut self)

Resets the StreamingDecoder

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

Provides access to the inner info field

pub fn set_ignore_text_chunk(&mut self, ignore_text_chunk: bool)

pub fn set_ignore_iccp_chunk(&mut self, ignore_iccp_chunk: bool)

pub fn ignore_adler32(&self) -> bool

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

pub 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.

pub 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.

pub fn set_skip_ancillary_crc_failures( &mut self, skip_ancillary_crc_failures: bool, )

Ignore ancillary chunks if CRC fails

Defaults to true

pub fn update( &mut self, buf: &[u8], image_data: &mut Vec<u8>, ) -> 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.

Trait Implementations

impl Default for StreamingDecoder

fn default() -> Self

Returns the “default value” for a type.