Enum naga::ConservativeDepth

pub enum ConservativeDepth {
    GreaterEqual,
    LessEqual,
    Unchanged,
}

Enables adjusting depth without disabling early Z.

To use in a shader:

• GLSL: layout (depth_<greater/less/unchanged/any>) out float gl_FragDepth;
  • depth_any option behaves as if the layout qualifier was not present.
• HLSL: SV_DepthGreaterEqual/SV_DepthLessEqual/SV_Depth
• SPIR-V: ExecutionMode Depth<Greater/Less/Unchanged>
• WGSL: @early_depth_test(greater_equal/less_equal/unchanged)

For more, see:

• https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_conservative_depth.txt
• https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-semantics#system-value-semantics
• https://www.khronos.org/registry/SPIR-V/specs/unified1/SPIRV.html#Execution_Mode

Variants

GreaterEqual

Shader may rewrite depth only with a value greater than calculated.

LessEqual

Shader may rewrite depth smaller than one that would have been written without the modification.

Unchanged

Shader may not rewrite depth value.

Trait Implementations

impl<'arbitrary> Arbitrary<'arbitrary> for ConservativeDepth

fn arbitrary(u: &mut Unstructured<'arbitrary>) -> Result<Self>

Generate an arbitrary value of Self from the given unstructured data.

fn arbitrary_take_rest(u: Unstructured<'arbitrary>) -> Result<Self>

Generate an arbitrary value of Self from the entirety of the given unstructured data.

fn size_hint(depth: usize) -> (usize, Option<usize>)

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

fn try_size_hint( depth: usize ) -> Result<(usize, Option<usize>), MaxRecursionReached>

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

impl Clone for ConservativeDepth

fn clone(&self) -> ConservativeDepth

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ConservativeDepth

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ConservativeDepth

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ConservativeDepth

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 Ord for ConservativeDepth

fn cmp(&self, other: &ConservativeDepth) -> 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 + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for ConservativeDepth

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

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Serialize for ConservativeDepth

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ConservativeDepth

impl Eq for ConservativeDepth

impl StructuralEq for ConservativeDepth

impl StructuralPartialEq for ConservativeDepth