Enum GainMapEncodingFormat 

#[non_exhaustive]
pub enum GainMapEncodingFormat {
    Xmp,
    Iso21496,
    Both,
}

Controls which metadata format(s) to embed in Ultra HDR output.

For maximum cross-platform compatibility, use Both (the default). XMP is universally supported; ISO 21496-1 binary is preferred by Android 15+ and iOS 18+ when present.

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.

Xmp

XMP only (hdrgm: namespace in APP1). Universally supported.

Iso21496

ISO 21496-1 binary only (APP2 with urn:iso:std:iso:ts:21496:-1). Newer apps prefer this when present. Some older tools may not read it.

Both

Both XMP and ISO 21496-1 binary. Maximum compatibility. XMP goes in the gain map JPEG’s APP1; ISO binary goes in APP2. Cost: ~60 bytes extra for the ISO binary block.

Trait Implementations

impl Clone for GainMapEncodingFormat

fn clone(&self) -> GainMapEncodingFormat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GainMapEncodingFormat

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

Formats the value using the given formatter.

impl Default for GainMapEncodingFormat

fn default() -> GainMapEncodingFormat

Returns the “default value” for a type.

impl PartialEq for GainMapEncodingFormat

fn eq(&self, other: &GainMapEncodingFormat) -> 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 GainMapEncodingFormat

impl Eq for GainMapEncodingFormat

impl StructuralPartialEq for GainMapEncodingFormat