Struct Constants 

pub struct Constants { /* private fields */ }

Constant-buffer words of one layout, zero until set.

Implementations

impl Constants

pub fn new(layout: &Layout) -> Self

Constant buffers laid out as layout says, every word zero and unset.

pub fn set(&mut self, field: &str, values: &[f32]) -> Result<bool, Error>

Write a field’s leading words. Ok(false) when the layout has no such field; more values than the field has words is an error. Words past the rows the program reads (or in a buffer it does not read) are not stored: the program cannot read them.

pub fn set_words( &mut self, buffer: u32, word_offset: u32, words: &[u32], ) -> Result<(), Error>

Write raw words at a stated offset of a buffer the program reads (a source that states offsets, integer fields, or a caller’s own field rules). Words outside the buffer are an error.

pub fn buffers(&self) -> &[(u32, Vec<[u32; 4]>)]

Every buffer the program reads, by slot, as its rows of four words (zero where nothing was written).

pub fn unset_words(&self) -> u64

Words never written, padding included: what the caller leaves at zero.

Trait Implementations

impl Clone for Constants

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Constants

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

Formats the value using the given formatter.