Struct png::adam7::Adam7Info

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pub struct Adam7Info {
    pub(crate) pass: u8,
    pub(crate) line: u32,
    pub(crate) width: u32,
}
Expand description

Describes which stage of the Adam7 algorithm applies to a decoded row.

See also Reader.next_interlaced_row.

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§pass: u8§line: u32§width: u32

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impl Adam7Info

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pub fn new(pass: u8, line: u32, width: u32) -> Self

Creates a new Adam7Info. May panic if the arguments are out of range (e.g. if pass is 0 or greater than 8).

  • pass corresponds to a pass of the the Adam7 algorithm
  • line is the number of a line within a pass (starting with 0). For example, in an image of height 8, line can be beteween 0..4 in the 7th pass (those 4 interlaced rows correspond to 2nd, 4th, 6th, and 8th row of the full image).
  • width describes how many pixels are in an interlaced row. For example, in the 7th pass, the width is be the same as full image width, but in in the 1st pass, the width is be 1/8th of the image width (rounded up as necessary).

Note that in typical usage, Adam7Infos are returned by [Reader.next_interlaced_row] and there is no need to create them by calling Adam7Info::new. Adam7Info::new is nevertheless exposed as a public API, because it helps to provide self-contained example usage of expand_interlaced_row.

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impl Clone for Adam7Info

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fn clone(&self) -> Adam7Info

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Adam7Info

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for Adam7Info

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fn eq(&self, other: &Adam7Info) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for Adam7Info

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impl Eq for Adam7Info

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impl StructuralPartialEq for Adam7Info

Auto Trait Implementations§

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

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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,

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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,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.