Struct DynamicOffsetMember

#[repr(C, align(256))]
pub struct DynamicOffsetMember<T>(pub T);

Pads a structure for use with dynamic offsets in graphics apis.

All dynamic offsets need to be aligned to 256 bytes. This automatically aligns your types to 256s.

Given a shader of:

uniform Uniforms {
    mat4 mvp;
    mat4 mv;
};

An array of rust structs can be made and used:

use shader_types::{Mat4, DynamicOffsetMember};

// Implementations don't matter
fn generate_mvp(_: usize) -> [f32; 16] {
    // ...
}
fn generate_mv(_: usize) -> [f32; 16] {
    // ...
}
fn set_uniform_buffer(_: &[DynamicOffsetMember<Uniforms>]) {
    // ...
}
fn bind_uniform_with_offset(_: usize) {
    // ...
}
fn render_object(_: usize) {
    // ...
}

#[repr(C)]
struct Uniforms {
    mvp: Mat4,
    mv: Mat4,
}

// Generate buffer
let mut vec: Vec<DynamicOffsetMember<Uniforms>> = Vec::new();
for obj_idx in 0..10 {
    vec.push(DynamicOffsetMember(Uniforms {
        mvp: Mat4::from(generate_mvp(obj_idx)),
        mv: Mat4::from(generate_mv(obj_idx)),
    }))
}

// Use Buffer
set_uniform_buffer(&vec);
for obj_idx in 0..10 {
    let offset = obj_idx * size_of::<DynamicOffsetMember<Uniforms>>();
    // Offset must be aligned by 256
    assert_eq!(offset % 256, 0);
    bind_uniform_with_offset(offset);
    render_object(obj_idx);
}

Tuple Fields

0: T

Trait Implementations

impl<T: Clone> Clone for DynamicOffsetMember<T>

fn clone(&self) -> DynamicOffsetMember<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for DynamicOffsetMember<T>

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

Formats the value using the given formatter.

impl<T: Default> Default for DynamicOffsetMember<T>

fn default() -> DynamicOffsetMember<T>

Returns the “default value” for a type.

impl<T: Hash> Hash for DynamicOffsetMember<T>

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<T: Ord> Ord for DynamicOffsetMember<T>

fn cmp(&self, other: &DynamicOffsetMember<T>) -> 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<T: PartialEq> PartialEq for DynamicOffsetMember<T>

fn eq(&self, other: &DynamicOffsetMember<T>) -> 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<T: PartialOrd> PartialOrd for DynamicOffsetMember<T>

fn partial_cmp(&self, other: &DynamicOffsetMember<T>) -> 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<T: Zeroable> Zeroable for DynamicOffsetMember<T>

fn zeroed() -> Self

Calls zeroed.

impl<T: Copy> Copy for DynamicOffsetMember<T>

impl<T: Eq> Eq for DynamicOffsetMember<T>

impl<T: Pod> Pod for DynamicOffsetMember<T>

impl<T> StructuralPartialEq for DynamicOffsetMember<T>