Enum Decoded 

#[non_exhaustive]
pub enum Decoded {
    Nothing,
    GlobalPalette(Box<[u8]>),
    BackgroundColor(u8),
    HeaderEnd,
    BlockStart(Block),
    SubBlock {
        ext: AnyExtension,
        is_last: bool,
    },
    FrameMetadata(FrameDataType),
    BytesDecoded(NonZeroUsize),
    LzwDataCopied(usize),
    DataEnd,
}

Indicates whether a certain object has been decoded

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Nothing

Decoded nothing.

GlobalPalette(Box<[u8]>)

Global palette.

BackgroundColor(u8)

Index of the background color in the global palette.

HeaderEnd

Palette and optional Application extension have been parsed, reached frame data.

BlockStart(Block)

The start of a block. BlockStart(Block::Trailer) is the very last decode event

SubBlock

Decoded a sub-block.

Call last_ext_sub_block() to get the sub-block data. It won’t be available after this event.

Fields

ext: AnyExtension

An ext label of 0 is used when the sub block does not belong to an extension.

is_last: bool

if true, then no more sub-blocks are available in this block.

FrameMetadata(FrameDataType)

Decoded all information of the next frame, except the image data.

The returned frame does not contain any owned image data.

Call current_frame_mut() to access the frame info.

BytesDecoded(NonZeroUsize)

Decoded some data of the current frame. Size is in bytes, always > 0

LzwDataCopied(usize)

Copied (or consumed and discarded) compressed data of the current frame. In bytes.

DataEnd

No more data available the current frame.

Trait Implementations

impl Debug for Decoded

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

Formats the value using the given formatter.