Enum image::ExtendedColorType

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#[non_exhaustive]
pub enum ExtendedColorType {
Show 27 variants A8, L1, La1, Rgb1, Rgba1, L2, La2, Rgb2, Rgba2, L4, La4, Rgb4, Rgba4, L8, La8, Rgb8, Rgba8, L16, La16, Rgb16, Rgba16, Bgr8, Bgra8, Rgb32F, Rgba32F, Cmyk8, Unknown(u8),
}
Expand description

An enumeration of color types encountered in image formats.

This is not exhaustive over all existing image formats but should be granular enough to allow round tripping of decoding and encoding as much as possible. The variants will be extended as necessary to enable this.

Another purpose is to advise users of a rough estimate of the accuracy and effort of the decoding from and encoding to such an image format.

Variants (Non-exhaustive)§

This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
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A8

Pixel is 8-bit alpha

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L1

Pixel is 1-bit luminance

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La1

Pixel is 1-bit luminance with an alpha channel

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Rgb1

Pixel contains 1-bit R, G and B channels

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Rgba1

Pixel is 1-bit RGB with an alpha channel

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L2

Pixel is 2-bit luminance

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La2

Pixel is 2-bit luminance with an alpha channel

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Rgb2

Pixel contains 2-bit R, G and B channels

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Rgba2

Pixel is 2-bit RGB with an alpha channel

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L4

Pixel is 4-bit luminance

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La4

Pixel is 4-bit luminance with an alpha channel

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Rgb4

Pixel contains 4-bit R, G and B channels

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Rgba4

Pixel is 4-bit RGB with an alpha channel

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L8

Pixel is 8-bit luminance

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La8

Pixel is 8-bit luminance with an alpha channel

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Rgb8

Pixel contains 8-bit R, G and B channels

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Rgba8

Pixel is 8-bit RGB with an alpha channel

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L16

Pixel is 16-bit luminance

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La16

Pixel is 16-bit luminance with an alpha channel

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Rgb16

Pixel contains 16-bit R, G and B channels

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Rgba16

Pixel is 16-bit RGB with an alpha channel

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Bgr8

Pixel contains 8-bit B, G and R channels

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Bgra8

Pixel is 8-bit BGR with an alpha channel

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Rgb32F

Pixel is 32-bit float RGB

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Rgba32F

Pixel is 32-bit float RGBA

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Cmyk8

Pixel is 8-bit CMYK

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Unknown(u8)

Pixel is of unknown color type with the specified bits per pixel. This can apply to pixels which are associated with an external palette. In that case, the pixel value is an index into the palette.

Implementations§

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impl ExtendedColorType

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pub fn channel_count(self) -> u8

Get the number of channels for colors of this type.

Note that the Unknown variant returns a value of 1 since pixels can only be treated as an opaque datum by the library.

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pub fn bits_per_pixel(&self) -> u16

Returns the number of bits per pixel for this color type.

Trait Implementations§

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impl Clone for ExtendedColorType

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fn clone(&self) -> ExtendedColorType

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 ExtendedColorType

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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 From<ColorType> for ExtendedColorType

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fn from(c: ColorType) -> Self

Converts to this type from the input type.
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impl Hash for ExtendedColorType

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for ExtendedColorType

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

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

This method 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 ExtendedColorType

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impl Eq for ExtendedColorType

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impl StructuralPartialEq for ExtendedColorType

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> 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.