[−][src]Struct image::pnm::PNMHeader

pub struct PNMHeader { /* fields omitted */ }

Stores the complete header data of a file.

Internally, provides mechanisms for lossless reencoding. After reading a file with the decoder it is possible to recover the header and construct an encoder. Using the encoder on the just loaded image should result in a byte copy of the original file (for single image pnms without additional trailing data).

Methods

impl PNMHeader[src]

pub fn subtype(&self) -> PNMSubtype[src]

Retrieve the format subtype from which the header was created.

pub fn width(&self) -> u32[src]

The width of the image this header is for.

pub fn height(&self) -> u32[src]

The height of the image this header is for.

pub fn maximal_sample(&self) -> u32[src]

The biggest value a sample can have. In other words, the colour resolution.

pub fn as_bitmap(&self) -> Option<&BitmapHeader>[src]

Retrieve the underlying bitmap header if any

pub fn as_graymap(&self) -> Option<&GraymapHeader>[src]

Retrieve the underlying graymap header if any

pub fn as_pixmap(&self) -> Option<&PixmapHeader>[src]

Retrieve the underlying pixmap header if any

pub fn as_arbitrary(&self) -> Option<&ArbitraryHeader>[src]

Retrieve the underlying arbitrary header if any

pub fn write(&self, writer: &mut dyn Write) -> Result<()>[src]

Write the header back into a binary stream

Trait Implementations

impl From<BitmapHeader> for PNMHeader[src]

impl From<GraymapHeader> for PNMHeader[src]

impl From<PixmapHeader> for PNMHeader[src]

impl From<ArbitraryHeader> for PNMHeader[src]

Auto Trait Implementations

impl Send for PNMHeader

impl Sync for PNMHeader

Blanket Implementations

impl<T> From for T[src]

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

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

type Error = !

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

The type returned in the event of a conversion error.

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

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

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

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

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

The type returned in the event of a conversion error.

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

impl<T> SetParameter for T[src]

fn set<T>(&mut self, value: T) -> <T as Parameter<Self>>::Result where
    T: Parameter<Self>, [src]

Sets value as a parameter of self.