Enum gif::Extension

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#[repr(u8)]
pub enum Extension { Text, Control, Comment, Application, }
Expand description

Known GIF extension labels.

These are extensions which may be interpreted by the library and to which a specification with the internal data layout is known.

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Text

Plain Text extension.

This instructs the decoder to render a text as characters in a grid of cells, in a mono-spaced font of its choosing. This is seldom actually implemented and ignored by ImageMagick. The color is always taken from the global table which further complicates any use. No real information on the frame sequencing of this block is available in the standard.

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Control

Control extension.

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Comment

Comment extension.

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Application

Application extension.

See ImageMagick for an idea of commonly recognized extensions.

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impl Extension

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pub fn from_u8(n: u8) -> Option<Extension>

Converts u8 to a Extension if it is known.

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impl Clone for Extension

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fn clone(&self) -> Extension

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 Extension

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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<Extension> for AnyExtension

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fn from(ext: Extension) -> Self

Converts to this type from the input type.
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impl PartialEq<Extension> for Extension

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

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impl Eq for Extension

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impl StructuralEq for Extension

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impl StructuralPartialEq for Extension

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Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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.