[−][src]Struct png::Reader

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

PNG reader (mostly high-level interface)

Provides a high level that iterates over lines or whole images.

Methods

impl<R: Read> Reader<R>[src]

pub fn info(&self) -> &Info[src]

pub fn next_frame(&mut self, buf: &mut [u8]) -> Result<(), DecodingError>[src]

Decodes the next frame into buf

pub fn next_row(&mut self) -> Result<Option<&[u8]>, DecodingError>[src]

Returns the next processed row of the image

pub fn next_interlaced_row(
    &mut self
) -> Result<Option<(&[u8], Option<(u8, u32, u32)>)>, DecodingError>[src]

Returns the next processed row of the image

pub fn output_color_type(&mut self) -> (ColorType, BitDepth)[src]

Returns the color type and the number of bits per sample of the data returned by Reader::next_row and Reader::frames`.

pub fn output_buffer_size(&self) -> usize[src]

Returns the number of bytes required to hold a deinterlaced image frame that is decoded using the given input transformations.

pub fn output_line_size(&self, width: u32) -> usize[src]

Returns the number of bytes required to hold a deinterlaced row.

Auto Trait Implementations

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

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

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

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

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

Blanket Implementations

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, [src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

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

The type returned in the event of a conversion error.

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

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