Enum mtpng::ColorType

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#[repr(u8)]
pub enum ColorType {
    Greyscale = 0,
    Truecolor = 2,
    IndexedColor = 3,
    GreyscaleAlpha = 4,
    TruecolorAlpha = 6,
}
Expand description

PNG color types.

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Greyscale = 0

Single brightness channel.

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Truecolor = 2

Red, green, and blue channels.

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IndexedColor = 3

Single channel of palette indices.

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GreyscaleAlpha = 4

Brightness and alpha channels.

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TruecolorAlpha = 6

Red, green, blue, and alpha channels.

Implementations§

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impl ColorType

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pub fn is_depth_valid(self, depth: u8) -> bool

Check if the given bit depth is valid for this color type.

See the PNG standard for valid types.

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pub fn channels(self) -> usize

Calculate the number of channels per pixel.

Trait Implementations§

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impl Clone for ColorType

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fn clone(&self) -> ColorType

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 TryFrom<u8> for ColorType

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fn try_from(val: u8) -> Result<Self, Self::Error>

Validate and produce a ColorType from one of the PNG header constants.

Will return an error on invalid input.

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type Error = Error

The type returned in the event of a conversion error.
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impl Copy for ColorType

Auto Trait Implementations§

Blanket 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> 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> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

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