Struct `PnmHeader`

struct PnmHeader { ... }

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).

Implementations

`impl PnmHeader`

fn subtype(self: &Self) -> PnmSubtype: Retrieve the format subtype from which the header was created.
fn width(self: &Self) -> u32: The width of the image this header is for.
fn height(self: &Self) -> u32: The height of the image this header is for.
fn maximal_sample(self: &Self) -> u32: The biggest value a sample can have. In other words, the colour resolution.
fn as_bitmap(self: &Self) -> Option<&BitmapHeader>: Retrieve the underlying bitmap header if any
fn as_graymap(self: &Self) -> Option<&GraymapHeader>: Retrieve the underlying graymap header if any
fn as_pixmap(self: &Self) -> Option<&PixmapHeader>: Retrieve the underlying pixmap header if any
fn as_arbitrary(self: &Self) -> Option<&ArbitraryHeader>: Retrieve the underlying arbitrary header if any
fn write(self: &Self, writer: &mut dyn Write) -> Result<()>: Write the header back into a binary stream

`impl Freeze for PnmHeader`

`impl From for PnmHeader`

fn from(header: PixmapHeader) -> Self

`impl From for PnmHeader`

fn from(header: ArbitraryHeader) -> Self

`impl From for PnmHeader`

fn from(header: BitmapHeader) -> Self

`impl From for PnmHeader`

fn from(header: GraymapHeader) -> Self

`impl RefUnwindSafe for PnmHeader`

`impl Send for PnmHeader`

`impl Sync for PnmHeader`

`impl Unpin for PnmHeader`

`impl UnsafeUnpin for PnmHeader`

`impl UnwindSafe for PnmHeader`

`impl<T> Any for PnmHeader`

fn type_id(self: &Self) -> TypeId

`impl<T> Borrow for PnmHeader`

fn borrow(self: &Self) -> &T

`impl<T> BorrowMut for PnmHeader`

fn borrow_mut(self: &mut Self) -> &mut T

`impl<T> From for PnmHeader`

fn from(t: T) -> T: Returns the argument unchanged.

`impl<T> Pointable for PnmHeader`

unsafe fn init(init: <T as Pointable>::Init) -> usize
unsafe fn deref<'a>(ptr: usize) -> &'a T
unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T
unsafe fn drop(ptr: usize)

`impl<T, U> Into for PnmHeader`

fn into(self: Self) -> U

Calls U::from(self).

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

`impl<T, U> TryFrom for PnmHeader`

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

`impl<T, U> TryInto for PnmHeader`

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