Struct png::ContentLightLevelInfo

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pub struct ContentLightLevelInfo {
    pub max_content_light_level: u32,
    pub max_frame_average_light_level: u32,
}
Expand description

Content light level information of HDR content.

See https://www.w3.org/TR/png-3/#cLLI-chunk for more details.

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§max_content_light_level: u32

Maximum Content Light Level indicates the maximum light level of any single pixel (in cd/m^2, also known as nits) of the entire playback sequence.

The value is expressed in units of 0.0001 cd/m^2 - for example if this field is set to 10000000 then it indicates 1000 cd/m^2.

A value of zero means that the value is unknown or not currently calculable.

§max_frame_average_light_level: u32

Maximum Frame Average Light Level indicates the maximum value of the frame average light level (in cd/m^2, also known as nits) of the entire playback sequence. It is calculated by first averaging the decoded luminance values of all the pixels in each frame, and then using the value for the frame with the highest value.

The value is expressed in units of 0.0001 cd/m^2 - for example if this field is set to 10000000 then it indicates 1000 cd/m^2.

A value of zero means that the value is unknown or not currently calculable.

Trait Implementations§

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impl Clone for ContentLightLevelInfo

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fn clone(&self) -> ContentLightLevelInfo

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 ContentLightLevelInfo

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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 ContentLightLevelInfo

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fn eq(&self, other: &ContentLightLevelInfo) -> 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 ContentLightLevelInfo

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impl Eq for ContentLightLevelInfo

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impl StructuralPartialEq for ContentLightLevelInfo

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.