Struct png::ScaledFloat

pub struct ScaledFloat(u32);

An unsigned integer scaled version of a floating point value, equivalent to an integer quotient with fixed denominator (100_000)).

Tuple Fields

0: u32

Implementations

impl ScaledFloat

const SCALING: f32 = 1.0E+5f32

pub fn in_range(value: f32) -> bool

Gets whether the value is within the clamped range of this type.

pub fn exact(value: f32) -> bool

Gets whether the value can be exactly converted in round-trip.

fn forward(value: f32) -> u32

fn reverse(encoded: u32) -> f32

pub fn new(value: f32) -> Self

Slightly inaccurate scaling and quantization. Clamps the value into the representable range if it is negative or too large.

pub fn from_scaled(val: u32) -> Self

Fully accurate construction from a value scaled as per specification.

pub fn into_scaled(self) -> u32

Get the accurate encoded value.

pub fn into_value(self) -> f32

Get the unscaled value as a floating point.

pub(crate) fn encode_gama<W: Write>( self, w: &mut W, ) -> Result<(), EncodingError>

Trait Implementations

impl Clone for ScaledFloat

fn clone(&self) -> ScaledFloat

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ScaledFloat

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

Formats the value using the given formatter.

impl PartialEq for ScaledFloat

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ScaledFloat

impl Eq for ScaledFloat

impl StructuralPartialEq for ScaledFloat