Struct QueryResultBuffer 

pub struct QueryResultBuffer { /* private fields */ }

Buffer for storing and reading query results.

Implementations

impl QueryResultBuffer

pub fn new(device: &Device, label: Option<&str>, count: u32) -> Self

Create a new query result buffer.

Arguments

• device - The wgpu device
• label - Optional debug label
• count - Number of query results to store

pub fn resolve_buffer(&self) -> &Buffer

Get the resolve buffer (used for query resolution).

pub fn read_buffer(&self) -> &Buffer

Get the read buffer (used for CPU readback).

pub fn count(&self) -> u32

Get the number of results this buffer can hold.

pub fn resolve( &self, encoder: &mut CommandEncoder, query_set: &QuerySet, query_range: Range<u32>, destination_offset: u32, )

Resolve queries from a query set into this buffer.

pub fn copy_to_readable(&self, encoder: &mut CommandEncoder)

Copy resolved results to the readable buffer.

pub fn map_async(&self) -> impl Future<Output = Result<(), BufferAsyncError>>

Map the read buffer for CPU access.

Returns a future that completes when the buffer is mapped.

pub fn read_results(&self) -> Vec<u64>

Read the query results (must be mapped first).

Returns the raw u64 timestamps/occlusion counts.