Struct exr::image::read::specific_channels::ReadOptionalChannel

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pub struct ReadOptionalChannel<ReadChannels, Sample> {
    previous_channels: ReadChannels,
    channel_name: Text,
    default_sample: Sample,
}
Expand description

Used to read another specific channel from an image. Contains the previous ReadChannels objects.

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§previous_channels: ReadChannels§channel_name: Text§default_sample: Sample

Trait Implementations§

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impl<Inner: CheckDuplicates, Sample> CheckDuplicates for ReadOptionalChannel<Inner, Sample>

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fn already_contains(&self, name: &Text) -> bool

Check for duplicate channel names.
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impl<ReadChannels: Clone, Sample: Clone> Clone for ReadOptionalChannel<ReadChannels, Sample>

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fn clone(&self) -> ReadOptionalChannel<ReadChannels, Sample>

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<ReadChannels: Debug, Sample: Debug> Debug for ReadOptionalChannel<ReadChannels, Sample>

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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<DefaultSample, ReadChannels> ReadSpecificChannel for ReadOptionalChannel<ReadChannels, DefaultSample>
where ReadChannels: ReadSpecificChannel, DefaultSample: FromNativeSample + 'static,

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type RecursivePixelReader = Recursive<<ReadChannels as ReadSpecificChannel>::RecursivePixelReader, OptionalSampleReader<DefaultSample>>

A separate internal reader for the pixels. Will be of type Recursive<_, SampleReader<_>>, depending on the pixels of the specific channel combination.
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fn create_recursive_reader( &self, channels: &ChannelList, ) -> Result<Self::RecursivePixelReader>

Create a separate internal reader for the pixels of the specific channel combination.
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fn required<Sample>( self, channel_name: impl Into<Text>, ) -> ReadRequiredChannel<Self, Sample>

Plan to read an additional channel from the image, with the specified name. If the channel cannot be found in the image when the image is read, the image will not be loaded. The generic parameter can usually be inferred from the closure in collect_pixels.
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fn optional<Sample>( self, channel_name: impl Into<Text>, default_sample: Sample, ) -> ReadOptionalChannel<Self, Sample>

Plan to read an additional channel from the image, with the specified name. If the file does not contain this channel, the specified default sample will be returned instead. You can check whether the channel has been loaded by checking the presence of the optional channel description before instantiating your own image. The generic parameter can usually be inferred from the closure in collect_pixels.

Auto Trait Implementations§

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impl<ReadChannels, Sample> Freeze for ReadOptionalChannel<ReadChannels, Sample>
where ReadChannels: Freeze, Sample: Freeze,

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impl<ReadChannels, Sample> RefUnwindSafe for ReadOptionalChannel<ReadChannels, Sample>
where ReadChannels: RefUnwindSafe, Sample: RefUnwindSafe,

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impl<ReadChannels, Sample> Send for ReadOptionalChannel<ReadChannels, Sample>
where ReadChannels: Send, Sample: Send,

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impl<ReadChannels, Sample> Sync for ReadOptionalChannel<ReadChannels, Sample>
where ReadChannels: Sync, Sample: Sync,

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impl<ReadChannels, Sample> Unpin for ReadOptionalChannel<ReadChannels, Sample>
where ReadChannels: Unpin, Sample: Unpin,

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impl<ReadChannels, Sample> UnwindSafe for ReadOptionalChannel<ReadChannels, Sample>
where ReadChannels: UnwindSafe, Sample: UnwindSafe,

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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> 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.