Struct png::Decoder

pub struct Decoder<R: Read> { /* fields omitted */ }

PNG Decoder

Methods

impl<R: Read> Decoder<R>

pub fn new(r: R) -> Decoder<R>

pub fn new_with_limits(r: R, l: Limits) -> Decoder<R>

pub fn set_limits(&mut self, limits: Limits)

Images that are considered too big

use std::fs::File;
use png::{Decoder, Limits};
// This image is 32x32 pixels, so it's more than four pixels in size.
let mut limits = Limits::default();
limits.pixels = 4;
let mut decoder = Decoder::new_with_limits(File::open("tests/pngsuite/basi0g01.png").unwrap(), limits);
assert!(decoder.read_info().is_err());
// This image is 32x32 pixels, so it's exactly 1024 pixels in size.
let mut limits = Limits::default();
limits.pixels = 1024;
let mut decoder = Decoder::new_with_limits(File::open("tests/pngsuite/basi0g01.png").unwrap(), limits);
assert!(decoder.read_info().is_ok());

pub fn read_info(self) -> Result<(OutputInfo, Reader<R>), DecodingError>

Reads all meta data until the first IDAT chunk

Trait Implementations

impl<R: Read> Parameter<Decoder<R>> for Transformations

fn set_param(self, this: &mut Decoder<R>)

impl<R: Read> HasParameters for Decoder<R>

fn set<T: Parameter<Self>>(&mut self, value: T) -> &mut Self