Enum image::ExtendedColorType

pub enum ExtendedColorType {
    L1,
    La1,
    Rgb1,
    Rgba1,
    L2,
    La2,
    Rgb2,
    Rgba2,
    L4,
    La4,
    Rgb4,
    Rgba4,
    L8,
    La8,
    Rgb8,
    Rgba8,
    L16,
    La16,
    Rgb16,
    Rgba16,
    Bgr8,
    Bgra8,
    Unknown(u8),
    // some variants omitted
}

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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

L1

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Pixel is 1-bit luminance

La1

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Pixel is 1-bit luminance with an alpha channel

Rgb1

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Pixel contains 1-bit R, G and B channels

Rgba1

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Pixel is 1-bit RGB with an alpha channel

L2

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Pixel is 2-bit luminance

La2

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Pixel is 2-bit luminance with an alpha channel

Rgb2

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Pixel contains 2-bit R, G and B channels

Rgba2

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Pixel is 2-bit RGB with an alpha channel

L4

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Pixel is 4-bit luminance

La4

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Pixel is 4-bit luminance with an alpha channel

Rgb4

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Pixel contains 4-bit R, G and B channels

Rgba4

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Pixel is 4-bit RGB with an alpha channel

L8

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Pixel is 8-bit luminance

La8

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Pixel is 8-bit luminance with an alpha channel

Rgb8

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Pixel contains 8-bit R, G and B channels

Rgba8

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Pixel is 8-bit RGB with an alpha channel

L16

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Pixel is 16-bit luminance

La16

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Pixel is 16-bit luminance with an alpha channel

Rgb16

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Pixel contains 16-bit R, G and B channels

Rgba16

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Pixel is 16-bit RGB with an alpha channel

Bgr8

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Pixel contains 8-bit B, G and R channels

Bgra8

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Pixel is 8-bit BGR with an alpha channel

Unknown(u8)

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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

impl ExtendedColorType

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.

Trait Implementations

impl Clone for ExtendedColorType

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fn clone(&self) -> ExtendedColorType[−]

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Debug for ExtendedColorType

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

Formats the value using the given formatter.

impl From<ColorType> for ExtendedColorType

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fn from(c: ColorType) -> Self[−]

Performs the conversion.

impl Hash for ExtendedColorType

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

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, [−]

Feeds a slice of this type into the given Hasher.

impl PartialEq<ExtendedColorType> 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 ==.

fn ne(&self, other: &ExtendedColorType) -> bool[−]

This method tests for !=.

impl Copy for ExtendedColorType

impl Eq for ExtendedColorType

impl StructuralEq for ExtendedColorType

impl StructuralPartialEq for ExtendedColorType