Enum FilterMethod

pub enum FilterMethod {
    Scale,
    Mipmap,
    Bilinear,
    Trilinear,
    Anisotropic(u8),
}

How to filter the texture when sampling. They correspond to increasing levels of quality, but also cost. Mipmap, trilinear and anisotropic filtering require mipmapping, but the other filtering methods do not.

These names are somewhat poor, in that “bilinear” is really just doing linear filtering on each axis, and it is only bilinear in the case of 2D textures. Similarly for trilinear, it is really Quadralinear(?) for 3D textures. Alas, these names are simple, and match certain intuitions ingrained by many years of public use of inaccurate terminology.

Variants

Scale

The dumbest filtering possible, nearest-neighbor interpolation.

Mipmap

Add simple mipmapping.

Bilinear

Sample multiple texels within a single mipmap level to increase quality.

Trilinear

Sample multiple texels across two mipmap levels to increase quality.

Anisotropic(u8)

Anisotropic filtering with a given “max”, must be between 1 and 16, inclusive.

Trait Implementations

impl Clone for FilterMethod

fn clone(&self) -> FilterMethod

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FilterMethod

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

Formats the value using the given formatter.

impl Hash for FilterMethod

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

where __H: Hasher,

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 Ord for FilterMethod

fn cmp(&self, other: &FilterMethod) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for FilterMethod

fn eq(&self, other: &FilterMethod) -> 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 PartialOrd for FilterMethod

fn partial_cmp(&self, other: &FilterMethod) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for FilterMethod

impl Eq for FilterMethod

impl StructuralPartialEq for FilterMethod