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Properly expose [Adapter::get_presentation_timestamp] (#3321)

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Connor Fitzgerald 2022-12-21 01:27:16 -05:00 committed by GitHub
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1 changed files with 34 additions and 8 deletions
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42
wgpu/src/lib.rs
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@ -36,14 +36,15 @@ pub use wgt::{
DepthStencilState, DeviceType, DownlevelCapabilities, DownlevelFlags, DynamicOffset, Extent3d,
Face, Features, FilterMode, FrontFace, ImageDataLayout, ImageSubresourceRange, IndexFormat,
Limits, MultisampleState, Origin3d, PipelineStatisticsTypes, PolygonMode, PowerPreference,
PresentMode, PrimitiveState, PrimitiveTopology, PushConstantRange, QueryType,
RenderBundleDepthStencil, SamplerBindingType, SamplerBorderColor, ShaderLocation, ShaderModel,
ShaderStages, StencilFaceState, StencilOperation, StencilState, StorageTextureAccess,
SurfaceCapabilities, SurfaceConfiguration, SurfaceStatus, TextureAspect, TextureDimension,
TextureFormat, TextureFormatFeatureFlags, TextureFormatFeatures, TextureSampleType,
TextureUsages, TextureViewDimension, VertexAttribute, VertexFormat, VertexStepMode,
COPY_BUFFER_ALIGNMENT, COPY_BYTES_PER_ROW_ALIGNMENT, MAP_ALIGNMENT, PUSH_CONSTANT_ALIGNMENT,
QUERY_RESOLVE_BUFFER_ALIGNMENT, QUERY_SET_MAX_QUERIES, QUERY_SIZE, VERTEX_STRIDE_ALIGNMENT,
PresentMode, PresentationTimestamp, PrimitiveState, PrimitiveTopology, PushConstantRange,
QueryType, RenderBundleDepthStencil, SamplerBindingType, SamplerBorderColor, ShaderLocation,
ShaderModel, ShaderStages, StencilFaceState, StencilOperation, StencilState,
StorageTextureAccess, SurfaceCapabilities, SurfaceConfiguration, SurfaceStatus, TextureAspect,
TextureDimension, TextureFormat, TextureFormatFeatureFlags, TextureFormatFeatures,
TextureSampleType, TextureUsages, TextureViewDimension, VertexAttribute, VertexFormat,
VertexStepMode, COPY_BUFFER_ALIGNMENT, COPY_BYTES_PER_ROW_ALIGNMENT, MAP_ALIGNMENT,
PUSH_CONSTANT_ALIGNMENT, QUERY_RESOLVE_BUFFER_ALIGNMENT, QUERY_SET_MAX_QUERIES, QUERY_SIZE,
VERTEX_STRIDE_ALIGNMENT,
};
/// Filter for error scopes.
@ -1770,6 +1771,31 @@ impl Adapter {
format,
)
}
/// Generates a timestamp using the clock used by the presentation engine.
///
/// When comparing completely opaque timestamp systems, we need a way of generating timestamps that signal
/// the exact same time. You can do this by calling your own timestamp function immediately after a call to
/// this function. This should result in timestamps that are 0.5 to 5 microseconds apart. There are locks
/// that must be taken during the call, so don't call your function before.
///
/// ```no_run
/// # let adapter: wgpu::Adapter = panic!();
/// # let some_code = || wgpu::PresentationTimestamp::INVALID_TIMESTAMP;
/// use std::time::{Duration, Instant};
/// let presentation = adapter.get_presentation_timestamp();
/// let instant = Instant::now();
///
/// // We can now turn a new presentation timestamp into an Instant.
/// let some_pres_timestamp = some_code();
/// let duration = Duration::from_nanos((some_pres_timestamp.0 - presentation.0) as u64);
/// let new_instant: Instant = instant + duration;
/// ```
//
/// [Instant]: std::time::Instant
pub fn get_presentation_timestamp(&self) -> PresentationTimestamp {
DynContext::adapter_get_presentation_timestamp(&*self.context, &self.id, self.data.as_ref())
}
}
impl Device {