#[repr(u8)]
pub enum Block {
Image,
Extension,
Trailer,
}
Expand description
Known GIF block labels.
Note that the block uniquely specifies the layout of bytes that follow and how they are
framed. For example, the header always has a fixed length but is followed by a variable amount
of additional data. An image descriptor may be followed by a local color table depending on
information read in it. Therefore, it doesn’t make sense to continue parsing after encountering
an unknown block as the semantics of following bytes are unclear.
The extension block provides a common framing for an arbitrary amount of application specific
data which may be ignored.
Converts u8
to Option<Self>
Performs copy-assignment from
source
.
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Formats the value using the given formatter.
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This method tests for self
and other
values to be equal, and is used
by ==
.
This method tests for !=
. The default implementation is almost always
sufficient, and should not be overridden without very good reason.
Immutably borrows from an owned value.
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Mutably borrows from an owned value.
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Returns the argument unchanged.
Calls U::from(self)
.
That is, this conversion is whatever the implementation of
From<T> for U
chooses to do.
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning.
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Uses borrowed data to replace owned data, usually by cloning.
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The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.