Enum ColorTransfer 

#[non_exhaustive]
pub enum ColorTransfer {
    Bt709,
    Srgb,
    Pq,
    Hlg,
    Linear,
}

Transfer function (color_transfer in the EdgeFirst schema).

Limitation: this axis is stored, propagated, and round-tripped, but it is not applied by any conversion backend. All YUV↔RGB paths operate only on the matrix (ColorEncoding) and range (ColorRange); the transfer function (gamma / TRC) is assumed to be the platform-native curve and is left unchanged. HDR transfer curves (Self::Pq / Self::Hlg) are therefore not tone-mapped — consumers needing linear-light or HDR handling must apply the curve themselves.

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.

Bt709

Srgb

Pq

Hlg

Hybrid Log-Gamma. Present for EdgeFirst-schema / libcamera parity; the V4L2 UAPI defines no V4L2_XFER_FUNC_HLG, so from_v4l2 never yields this variant.

Linear

Implementations

impl ColorTransfer

pub fn as_str(self) -> &'static str

Short string label matching the EdgeFirst schema.

pub fn from_v4l2(v: u32) -> Option<Self>

Map a raw V4L2 xfer_func field to a ColorTransfer.

Returns None for V4L2_XFER_FUNC_DEFAULT (0) and any unrecognised value.

Note: OPRGB (3), SMPTE240M (4), and DCI_P3 (6) have no HAL equivalent and map to None. ColorTransfer::Hlg is never produced because the V4L2 UAPI defines no V4L2_XFER_FUNC_HLG value.

Trait Implementations

impl Clone for ColorTransfer

fn clone(&self) -> ColorTransfer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ColorTransfer

impl Debug for ColorTransfer

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ColorTransfer

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ColorTransfer

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

Formats the value using the given formatter.

impl Eq for ColorTransfer

impl Hash for ColorTransfer

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ColorTransfer

fn eq(&self, other: &ColorTransfer) -> 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 Serialize for ColorTransfer

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 ColorTransfer