pub struct CommandEncoder { /* private fields */ }
Expand description

Encodes a series of GPU operations.

A command encoder can record [RenderPass]es, ComputePasses, and transfer operations between driver-managed resources like [Buffer]s and [Texture]s.

When finished recording, call CommandEncoder::finish to obtain a [CommandBuffer] which may be submitted for execution.

Corresponds to WebGPU GPUCommandEncoder.

Implementations§

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impl CommandEncoder

pub fn finish(self) -> CommandBuffer

Finishes recording and returns a [CommandBuffer] that can be submitted for execution.

pub fn begin_render_pass<'pass>( &'pass mut self, desc: &RenderPassDescriptor<'pass, '_> ) -> RenderPass<'pass>

Begins recording of a render pass.

This function returns a [RenderPass] object which records a single render pass.

pub fn begin_compute_pass( &mut self, desc: &ComputePassDescriptor<'_> ) -> ComputePass<'_>

Begins recording of a compute pass.

This function returns a ComputePass object which records a single compute pass.

pub fn copy_buffer_to_buffer( &mut self, source: &Buffer, source_offset: u64, destination: &Buffer, destination_offset: u64, copy_size: u64 )

Copy data from one buffer to another.

Panics
  • Buffer offsets or copy size not a multiple of [COPY_BUFFER_ALIGNMENT].
  • Copy would overrun buffer.
  • Copy within the same buffer.

pub fn copy_buffer_to_texture( &mut self, source: ImageCopyBuffer<&Buffer>, destination: ImageCopyTexture<&Texture>, copy_size: Extent3d )

Copy data from a buffer to a texture.

pub fn copy_texture_to_buffer( &mut self, source: ImageCopyTexture<&Texture>, destination: ImageCopyBuffer<&Buffer>, copy_size: Extent3d )

Copy data from a texture to a buffer.

pub fn copy_texture_to_texture( &mut self, source: ImageCopyTexture<&Texture>, destination: ImageCopyTexture<&Texture>, copy_size: Extent3d )

Copy data from one texture to another.

Panics
  • Textures are not the same type
  • If a depth texture, or a multisampled texture, the entire texture must be copied
  • Copy would overrun either texture

pub fn clear_texture( &mut self, texture: &Texture, subresource_range: &ImageSubresourceRange )

Clears texture to zero.

Note that unlike with clear_buffer, COPY_DST usage is not required.

Implementation notes
  • implemented either via buffer copies and render/depth target clear, path depends on texture usages
  • behaves like texture zero init, but is performed immediately (clearing is not delayed via marking it as uninitialized)
Panics
  • CLEAR_TEXTURE extension not enabled
  • Range is out of bounds

pub fn clear_buffer( &mut self, buffer: &Buffer, offset: u64, size: Option<NonZeroU64> )

Clears buffer to zero.

Panics
  • Buffer does not have COPY_DST usage.
  • Range it out of bounds

pub fn insert_debug_marker(&mut self, label: &str)

Inserts debug marker.

pub fn push_debug_group(&mut self, label: &str)

Start record commands and group it into debug marker group.

pub fn pop_debug_group(&mut self)

Stops command recording and creates debug group.

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impl CommandEncoder

Features::TIMESTAMP_QUERY must be enabled on the device in order to call these functions.

pub fn write_timestamp(&mut self, query_set: &QuerySet, query_index: u32)

Issue a timestamp command at this point in the queue. The timestamp will be written to the specified query set, at the specified index.

Must be multiplied by [Queue::get_timestamp_period] to get the value in nanoseconds. Absolute values have no meaning, but timestamps can be subtracted to get the time it takes for a string of operations to complete.

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impl CommandEncoder

Features::TIMESTAMP_QUERY or Features::PIPELINE_STATISTICS_QUERY must be enabled on the device in order to call these functions.

pub fn resolve_query_set( &mut self, query_set: &QuerySet, query_range: Range<u32>, destination: &Buffer, destination_offset: u64 )

Resolve a query set, writing the results into the supplied destination buffer.

Queries may be between 8 and 40 bytes each. See [PipelineStatisticsTypes] for more information.

Trait Implementations§

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impl Debug for CommandEncoder

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

Formats the value using the given formatter. Read more
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impl Drop for CommandEncoder

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fn drop(&mut self)

Executes the destructor for this type. Read more

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Return the T ShaderType for self. When used in AsBindGroup derives, it is safe to assume that all images in self exist.
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