Struct Layout 

pub struct Layout {
    pub container: String,
    pub total_len: u64,
    pub orientation: u16,
    pub segments: Vec<Segment>,
}

Fields

container: String

total_len: u64

orientation: u16

TIFF/Exif orientation (tag 274). 1 means “already upright”.

Stored pixels are frequently not upright: cameras record the sensor readout as captured and note the rotation separately. Anything that displays the pixels without consulting this — a thumbnailer, say — shows the photo on its side.

segments: Vec<Segment>

Implementations

impl Layout

pub fn validate(&self) -> Result<()>

Verify the invariant the whole design rests on: segments must tile the file exactly — sorted, contiguous, starting at 0, ending at total_len.

Called on every archive and every restore. A layout that fails this can never reproduce the original, so we refuse it rather than write an archive we cannot honour.

pub fn image_segments( &self, ) -> impl Iterator<Item = (usize, &Segment, &ImageSpec)>

pub fn payload_len(&self) -> u64

Total bytes held in image segments — the part a codec can act on.

pub fn skeleton_len(&self) -> u64

Total bytes stored verbatim — the skeleton.

Trait Implementations

impl Clone for Layout

fn clone(&self) -> Layout

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Layout

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Layout

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Layout

impl PartialEq for Layout

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Layout

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Layout