Struct RGBE8 

#[repr(C, align(4))]
pub struct RGBE8 {
    pub r: u8,
    pub g: u8,
    pub b: u8,
    pub e: u8,
}

Aligned representation of Radiance RGBE8 pixel. r, g, and b are subnormal mantissas and e (taking the place of the alpha channel) is a common exponent. This is commonly loaded from Radiance pictures (.hdr).

As it uses 4 u8 components, this format can also be used with PNG compression, with the exponent taking the place of the alpha channel. This will preserve chroma but distort luminance if loaded as a normal PNG, making thumbnailers somewhat useful for image identification.

Fields

r: u8

g: u8

b: u8

e: u8

Implementations

impl RGBE8

pub fn pack(rgb: [f32; 3]) -> Self

Pack a triple of RGB float values into an RGBE8. This is not as optimized as RGB9E5::pack since it is designed for use in tooling instead of asset loading.

pub fn unpack(self) -> [f32; 3]

Convert a packed color to individual floats

pub fn repack_rgb9e5(self) -> RGB9E5

Repack RGBE8 into RGB9E5 for use on the GPU. This can cause saturation or loss of precision if the exponent is outside the range of RGB9E5.

Trait Implementations

impl Clone for RGBE8

fn clone(&self) -> RGBE8

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RGBE8

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

Formats the value using the given formatter.

impl From<RGBE8> for [f32; 3]

fn from(color: RGBE8) -> Self

Converts to this type from the input type.

impl PartialEq for RGBE8

fn eq(&self, other: &RGBE8) -> 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 Zeroable for RGBE8

fn zeroed() -> Self

Calls zeroed.

impl Copy for RGBE8

impl Eq for RGBE8

impl Pod for RGBE8

impl StructuralPartialEq for RGBE8