Struct image::codecs::png::PngReader

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pub struct PngReader<R: Read> { /* private fields */ }

Expand description

Png Reader

This reader will try to read the png one row at a time, however for interlaced png files this is not possible and these are therefore read at once.

Trait Implementations

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impl<R: Read> Read for PngReader<R>

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fn read(&mut self, buf: &mut [u8 ]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more

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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>

Read all bytes until EOF in this source, placing them into buf. Read more

1.36.0 · source

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers. Read more

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fn is_read_vectored(&self) -> bool

🔬 This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation. Read more

1.0.0 · source

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf. Read more

1.6.0 · source

fn read_exact(&mut self, buf: &mut [u8 ]) -> Result<(), Error>

Read the exact number of bytes required to fill buf. Read more

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fn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>

🔬 This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer. Read more

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fn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>

🔬 This is a nightly-only experimental API. (read_buf)

Read the exact number of bytes required to fill buf. Read more

1.0.0 · source

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adaptor for this instance of Read. Read more

1.0.0 · source

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an Iterator over its bytes. Read more

1.0.0 · source

fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,

Creates an adapter which will chain this stream with another. Read more

1.0.0 · source

fn take(self, limit: u64) -> Take<Self>

Creates an adapter which will read at most limit bytes from it. Read more

Auto Trait Implementations

impl<R> RefUnwindSafe for PngReader<R> where
R: RefUnwindSafe,

impl<R> Send for PngReader<R> where
R: Send,

impl<R> Sync for PngReader<R> where
R: Sync,

impl<R> Unpin for PngReader<R> where
R: Unpin,

impl<R> UnwindSafe for PngReader<R> where
R: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

pub fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

pub fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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pub const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

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pub unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

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pub unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

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pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

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pub unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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impl<R> ReadBytesExt for R where
R: Read + ?Sized,

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fn read_u8(&mut self) -> Result<u8, Error>

Reads an unsigned 8 bit integer from the underlying reader. Read more

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fn read_i8(&mut self) -> Result<i8, Error>

Reads a signed 8 bit integer from the underlying reader. Read more

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fn read_u16<T>(&mut self) -> Result<u16, Error> where
T: ByteOrder,

Reads an unsigned 16 bit integer from the underlying reader. Read more

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fn read_i16<T>(&mut self) -> Result<i16, Error> where
T: ByteOrder,

Reads a signed 16 bit integer from the underlying reader. Read more

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fn read_u24<T>(&mut self) -> Result<u32, Error> where
T: ByteOrder,

Reads an unsigned 24 bit integer from the underlying reader. Read more

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fn read_i24<T>(&mut self) -> Result<i32, Error> where
T: ByteOrder,

Reads a signed 24 bit integer from the underlying reader. Read more

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fn read_u32<T>(&mut self) -> Result<u32, Error> where
T: ByteOrder,

Reads an unsigned 32 bit integer from the underlying reader. Read more

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fn read_i32<T>(&mut self) -> Result<i32, Error> where
T: ByteOrder,

Reads a signed 32 bit integer from the underlying reader. Read more

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fn read_u48<T>(&mut self) -> Result<u64, Error> where
T: ByteOrder,

Reads an unsigned 48 bit integer from the underlying reader. Read more

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fn read_i48<T>(&mut self) -> Result<i64, Error> where
T: ByteOrder,

Reads a signed 48 bit integer from the underlying reader. Read more

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fn read_u64<T>(&mut self) -> Result<u64, Error> where
T: ByteOrder,

Reads an unsigned 64 bit integer from the underlying reader. Read more

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fn read_i64<T>(&mut self) -> Result<i64, Error> where
T: ByteOrder,

Reads a signed 64 bit integer from the underlying reader. Read more

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fn read_u128<T>(&mut self) -> Result<u128, Error> where
T: ByteOrder,

Reads an unsigned 128 bit integer from the underlying reader. Read more

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fn read_i128<T>(&mut self) -> Result<i128, Error> where
T: ByteOrder,

Reads a signed 128 bit integer from the underlying reader. Read more

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fn read_uint<T>(&mut self, nbytes: usize) -> Result<u64, Error> where
T: ByteOrder,

Reads an unsigned n-bytes integer from the underlying reader. Read more

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fn read_int<T>(&mut self, nbytes: usize) -> Result<i64, Error> where
T: ByteOrder,

Reads a signed n-bytes integer from the underlying reader. Read more

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fn read_uint128<T>(&mut self, nbytes: usize) -> Result<u128, Error> where
T: ByteOrder,

Reads an unsigned n-bytes integer from the underlying reader.

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fn read_int128<T>(&mut self, nbytes: usize) -> Result<i128, Error> where
T: ByteOrder,

Reads a signed n-bytes integer from the underlying reader.

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fn read_f32<T>(&mut self) -> Result<f32, Error> where
T: ByteOrder,

Reads a IEEE754 single-precision (4 bytes) floating point number from the underlying reader. Read more

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fn read_f64<T>(&mut self) -> Result<f64, Error> where
T: ByteOrder,

Reads a IEEE754 double-precision (8 bytes) floating point number from the underlying reader. Read more

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fn read_u16_into<T>(&mut self, dst: &mut [u16 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of unsigned 16 bit integers from the underlying reader. Read more

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fn read_u32_into<T>(&mut self, dst: &mut [u32 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of unsigned 32 bit integers from the underlying reader. Read more

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fn read_u64_into<T>(&mut self, dst: &mut [u64 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of unsigned 64 bit integers from the underlying reader. Read more

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fn read_u128_into<T>(&mut self, dst: &mut [u128 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of unsigned 128 bit integers from the underlying reader. Read more

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fn read_i8_into(&mut self, dst: &mut [i8 ]) -> Result<(), Error>

Reads a sequence of signed 8 bit integers from the underlying reader. Read more

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fn read_i16_into<T>(&mut self, dst: &mut [i16 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of signed 16 bit integers from the underlying reader. Read more

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fn read_i32_into<T>(&mut self, dst: &mut [i32 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of signed 32 bit integers from the underlying reader. Read more

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fn read_i64_into<T>(&mut self, dst: &mut [i64 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of signed 64 bit integers from the underlying reader. Read more

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fn read_i128_into<T>(&mut self, dst: &mut [i128 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of signed 128 bit integers from the underlying reader. Read more

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fn read_f32_into<T>(&mut self, dst: &mut [f32 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of IEEE754 single-precision (4 bytes) floating point numbers from the underlying reader. Read more

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fn read_f32_into_unchecked<T>(&mut self, dst: &mut [f32 ]) -> Result<(), Error> where
T: ByteOrder,

👎 Deprecated since 1.2.0:

please use read_f32_into instead

DEPRECATED. Read more

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fn read_f64_into<T>(&mut self, dst: &mut [f64 ]) -> Result<(), Error> where
T: ByteOrder,

Reads a sequence of IEEE754 double-precision (8 bytes) floating point numbers from the underlying reader. Read more

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fn read_f64_into_unchecked<T>(&mut self, dst: &mut [f64 ]) -> Result<(), Error> where
T: ByteOrder,

👎 Deprecated since 1.2.0:

please use read_f64_into instead

DEPRECATED. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct image::codecs::png::PngReader

Trait Implementations

impl<R: Read> Read for PngReader<R>

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

fn is_read_vectored(&self) -> bool

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

fn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>

fn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>

fn by_ref(&mut self) -> &mut Self

fn bytes(self) -> Bytes<Self>

fn chain<R>(self, next: R) -> Chain<Self, R> where R: Read,

fn take(self, limit: u64) -> Take<Self>

Auto Trait Implementations

impl<R> RefUnwindSafe for PngReader<R> where R: RefUnwindSafe,

impl<R> Send for PngReader<R> where R: Send,

impl<R> Sync for PngReader<R> where R: Sync,

impl<R> Unpin for PngReader<R> where R: Unpin,

impl<R> UnwindSafe for PngReader<R> where R: UnwindSafe,

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

pub fn into(self) -> U

impl<T> Pointable for T

pub const ALIGN: usize

type Init = T

pub unsafe fn init(init: <T as Pointable>::Init) -> usize

pub unsafe fn deref<'a>(ptr: usize) -> &'a T

pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

pub unsafe fn drop(ptr: usize)

impl<R> ReadBytesExt for R where R: Read + ?Sized,

fn read_u8(&mut self) -> Result<u8, Error>

fn read_i8(&mut self) -> Result<i8, Error>

fn read_u16<T>(&mut self) -> Result<u16, Error> where T: ByteOrder,

fn read_i16<T>(&mut self) -> Result<i16, Error> where T: ByteOrder,

fn read_u24<T>(&mut self) -> Result<u32, Error> where T: ByteOrder,

fn read_i24<T>(&mut self) -> Result<i32, Error> where T: ByteOrder,

fn read_u32<T>(&mut self) -> Result<u32, Error> where T: ByteOrder,

fn read_i32<T>(&mut self) -> Result<i32, Error> where T: ByteOrder,

fn read_u48<T>(&mut self) -> Result<u64, Error> where T: ByteOrder,

fn read_i48<T>(&mut self) -> Result<i64, Error> where T: ByteOrder,

fn read_u64<T>(&mut self) -> Result<u64, Error> where T: ByteOrder,

fn read_i64<T>(&mut self) -> Result<i64, Error> where T: ByteOrder,

fn read_u128<T>(&mut self) -> Result<u128, Error> where T: ByteOrder,

fn read_i128<T>(&mut self) -> Result<i128, Error> where T: ByteOrder,

fn read_uint<T>(&mut self, nbytes: usize) -> Result<u64, Error> where T: ByteOrder,

fn read_int<T>(&mut self, nbytes: usize) -> Result<i64, Error> where T: ByteOrder,

fn read_uint128<T>(&mut self, nbytes: usize) -> Result<u128, Error> where T: ByteOrder,

fn read_int128<T>(&mut self, nbytes: usize) -> Result<i128, Error> where T: ByteOrder,

fn read_f32<T>(&mut self) -> Result<f32, Error> where T: ByteOrder,

fn read_f64<T>(&mut self) -> Result<f64, Error> where T: ByteOrder,

fn read_u16_into<T>(&mut self, dst: &mut [u16]) -> Result<(), Error> where T: ByteOrder,

fn read_u32_into<T>(&mut self, dst: &mut [u32]) -> Result<(), Error> where T: ByteOrder,

fn read_u64_into<T>(&mut self, dst: &mut [u64]) -> Result<(), Error> where T: ByteOrder,

fn read_u128_into<T>(&mut self, dst: &mut [u128]) -> Result<(), Error> where T: ByteOrder,

fn read_i8_into(&mut self, dst: &mut [i8]) -> Result<(), Error>

fn read_i16_into<T>(&mut self, dst: &mut [i16]) -> Result<(), Error> where T: ByteOrder,

fn read_i32_into<T>(&mut self, dst: &mut [i32]) -> Result<(), Error> where T: ByteOrder,

fn read_i64_into<T>(&mut self, dst: &mut [i64]) -> Result<(), Error> where T: ByteOrder,

fn read_i128_into<T>(&mut self, dst: &mut [i128]) -> Result<(), Error> where T: ByteOrder,

fn read_f32_into<T>(&mut self, dst: &mut [f32]) -> Result<(), Error> where T: ByteOrder,

fn read_f32_into_unchecked<T>(&mut self, dst: &mut [f32]) -> Result<(), Error> where T: ByteOrder,

fn read_f64_into<T>(&mut self, dst: &mut [f64]) -> Result<(), Error> where T: ByteOrder,

fn read_f64_into_unchecked<T>(&mut self, dst: &mut [f64]) -> Result<(), Error> where T: ByteOrder,

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

fn read(&mut self, buf: &mut [u8 ]) -> Result<usize>

fn read_exact(&mut self, buf: &mut [u8 ]) -> Result<(), Error>

fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,

impl<R> RefUnwindSafe for PngReader<R> where
R: RefUnwindSafe,

impl<R> Send for PngReader<R> where
R: Send,

impl<R> Sync for PngReader<R> where
R: Sync,

impl<R> Unpin for PngReader<R> where
R: Unpin,

impl<R> UnwindSafe for PngReader<R> where
R: UnwindSafe,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<R> ReadBytesExt for R where
R: Read + ?Sized,

fn read_u16<T>(&mut self) -> Result<u16, Error> where
T: ByteOrder,

fn read_i16<T>(&mut self) -> Result<i16, Error> where
T: ByteOrder,

fn read_u24<T>(&mut self) -> Result<u32, Error> where
T: ByteOrder,

fn read_i24<T>(&mut self) -> Result<i32, Error> where
T: ByteOrder,

fn read_u32<T>(&mut self) -> Result<u32, Error> where
T: ByteOrder,

fn read_i32<T>(&mut self) -> Result<i32, Error> where
T: ByteOrder,

fn read_u48<T>(&mut self) -> Result<u64, Error> where
T: ByteOrder,

fn read_i48<T>(&mut self) -> Result<i64, Error> where
T: ByteOrder,

fn read_u64<T>(&mut self) -> Result<u64, Error> where
T: ByteOrder,

fn read_i64<T>(&mut self) -> Result<i64, Error> where
T: ByteOrder,

fn read_u128<T>(&mut self) -> Result<u128, Error> where
T: ByteOrder,

fn read_i128<T>(&mut self) -> Result<i128, Error> where
T: ByteOrder,

fn read_uint<T>(&mut self, nbytes: usize) -> Result<u64, Error> where
T: ByteOrder,

fn read_int<T>(&mut self, nbytes: usize) -> Result<i64, Error> where
T: ByteOrder,

fn read_uint128<T>(&mut self, nbytes: usize) -> Result<u128, Error> where
T: ByteOrder,

fn read_int128<T>(&mut self, nbytes: usize) -> Result<i128, Error> where
T: ByteOrder,

fn read_f32<T>(&mut self) -> Result<f32, Error> where
T: ByteOrder,

fn read_f64<T>(&mut self) -> Result<f64, Error> where
T: ByteOrder,

fn read_u16_into<T>(&mut self, dst: &mut [u16 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_u32_into<T>(&mut self, dst: &mut [u32 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_u64_into<T>(&mut self, dst: &mut [u64 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_u128_into<T>(&mut self, dst: &mut [u128 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_i8_into(&mut self, dst: &mut [i8 ]) -> Result<(), Error>

fn read_i16_into<T>(&mut self, dst: &mut [i16 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_i32_into<T>(&mut self, dst: &mut [i32 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_i64_into<T>(&mut self, dst: &mut [i64 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_i128_into<T>(&mut self, dst: &mut [i128 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_f32_into<T>(&mut self, dst: &mut [f32 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_f32_into_unchecked<T>(&mut self, dst: &mut [f32 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_f64_into<T>(&mut self, dst: &mut [f64 ]) -> Result<(), Error> where
T: ByteOrder,

fn read_f64_into_unchecked<T>(&mut self, dst: &mut [f64 ]) -> Result<(), Error> where
T: ByteOrder,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,