Enum gif::common::Block

#[repr(u8)]
pub enum Block {
    Image = 44,
    Extension = 33,
    Trailer = 59,
}

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.

Variants

Image = 44

Image block.

Extension = 33

Extension block.

Trailer = 59

Image trailer.

Implementations

impl Block

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

Converts u8 to Option<Self>

Trait Implementations

impl Clone for Block

fn clone(&self) -> Block

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Block

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

Formats the value using the given formatter.

impl PartialEq for Block

fn eq(&self, other: &Block) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Block

impl Eq for Block

impl StructuralPartialEq for Block