Struct laz::laszip::LasZipDecompressor

pub struct LasZipDecompressor<'a, R: Read + Seek + 'a> { /* private fields */ }

LasZip decompressor that decompresses points.

Supports both fixed-size and variable-size chunks.

Implementations

impl<'a, R: Read + Seek + Send + 'a> LasZipDecompressor<'a, R>

pub fn new(source: R, vlr: LazVlr) -> Result<Self>

Creates a new instance from a data source of compressed points and the LazVlr describing the compressed data.

The created decompressor will decompress all data

pub fn selective(
    source: R,
    vlr: LazVlr,
    selection: DecompressionSelection
) -> Result<Self>

Creates a new decompressor, that will only decompress fields that are selected by the selection.

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

Decompress the next point and write the uncompressed data to the out buffer.

• The buffer should have at least enough byte to store the decompressed data
• The data is written in the buffer exactly as it would have been in a LAS File in Little Endian order,

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

Decompress as many points as the out slice can hold

Note

If the out slice contains more space than there are points the function will still decompress and thus and error will occur

pub fn seek(&mut self, point_idx: u64) -> Result<()>

Seeks to the point designed by the index

Important

Seeking in compressed data has a higher cost than non compressed data because the stream has to be moved to the start of the chunk and then we have to decompress points in the chunk until we reach the one we want.

pub fn vlr(&self) -> &LazVlr

Returns the vlr used.

pub fn into_inner(self) -> R

Consumes the decompressor and returns the data source.

pub fn get_mut(&mut self) -> &mut R

pub fn get(&self) -> &R

Returns a reference to the data source.

Trait Implementations

impl<'a, R: Read + Seek + Send> LasPointReader for LasZipDecompressor<'a, R>

fn read_next_into(&mut self, buffer: &mut [u8]) -> Result<()>

impl<'a, R: Read + Seek + Send + 'a> LazDecompressor for LasZipDecompressor<'a, R>

fn decompress_many(&mut self, points: &mut [u8]) -> Result<()>

fn seek(&mut self, index: u64) -> Result<()>