wgpu_core/command/render_command.rs
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use alloc::sync::Arc;
use wgt::{BufferAddress, BufferSize, Color};
use super::{Rect, RenderBundle};
use crate::{
binding_model::BindGroup,
id,
pipeline::RenderPipeline,
resource::{Buffer, QuerySet},
};
#[doc(hidden)]
#[derive(Clone, Copy, Debug)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub enum RenderCommand {
SetBindGroup {
index: u32,
num_dynamic_offsets: usize,
bind_group_id: Option<id::BindGroupId>,
},
SetPipeline(id::RenderPipelineId),
SetIndexBuffer {
buffer_id: id::BufferId,
index_format: wgt::IndexFormat,
offset: BufferAddress,
size: Option<BufferSize>,
},
SetVertexBuffer {
slot: u32,
buffer_id: id::BufferId,
offset: BufferAddress,
size: Option<BufferSize>,
},
SetBlendConstant(Color),
SetStencilReference(u32),
SetViewport {
rect: Rect<f32>,
//TODO: use half-float to reduce the size?
depth_min: f32,
depth_max: f32,
},
SetScissor(Rect<u32>),
/// Set a range of push constants to values stored in [`BasePass::push_constant_data`].
///
/// See [`wgpu::RenderPass::set_push_constants`] for a detailed explanation
/// of the restrictions these commands must satisfy.
SetPushConstant {
/// Which stages we are setting push constant values for.
stages: wgt::ShaderStages,
/// The byte offset within the push constant storage to write to. This
/// must be a multiple of four.
offset: u32,
/// The number of bytes to write. This must be a multiple of four.
size_bytes: u32,
/// Index in [`BasePass::push_constant_data`] of the start of the data
/// to be written.
///
/// Note: this is not a byte offset like `offset`. Rather, it is the
/// index of the first `u32` element in `push_constant_data` to read.
///
/// `None` means zeros should be written to the destination range, and
/// there is no corresponding data in `push_constant_data`. This is used
/// by render bundles, which explicitly clear out any state that
/// post-bundle code might see.
values_offset: Option<u32>,
},
Draw {
vertex_count: u32,
instance_count: u32,
first_vertex: u32,
first_instance: u32,
},
DrawIndexed {
index_count: u32,
instance_count: u32,
first_index: u32,
base_vertex: i32,
first_instance: u32,
},
DrawIndirect {
buffer_id: id::BufferId,
offset: BufferAddress,
count: u32,
indexed: bool,
},
MultiDrawIndirectCount {
buffer_id: id::BufferId,
offset: BufferAddress,
count_buffer_id: id::BufferId,
count_buffer_offset: BufferAddress,
max_count: u32,
indexed: bool,
},
PushDebugGroup {
color: u32,
len: usize,
},
PopDebugGroup,
InsertDebugMarker {
color: u32,
len: usize,
},
WriteTimestamp {
query_set_id: id::QuerySetId,
query_index: u32,
},
BeginOcclusionQuery {
query_index: u32,
},
EndOcclusionQuery,
BeginPipelineStatisticsQuery {
query_set_id: id::QuerySetId,
query_index: u32,
},
EndPipelineStatisticsQuery,
ExecuteBundle(id::RenderBundleId),
}
impl RenderCommand {
/// Resolves all ids in a list of commands into the corresponding resource Arc.
#[cfg(any(feature = "serde", feature = "replay"))]
pub fn resolve_render_command_ids(
hub: &crate::hub::Hub,
commands: &[RenderCommand],
) -> Result<alloc::vec::Vec<ArcRenderCommand>, super::RenderPassError> {
use super::{DrawKind, PassErrorScope, RenderPassError};
use alloc::vec::Vec;
let buffers_guard = hub.buffers.read();
let bind_group_guard = hub.bind_groups.read();
let query_set_guard = hub.query_sets.read();
let pipelines_guard = hub.render_pipelines.read();
let render_bundles_guard = hub.render_bundles.read();
let resolved_commands: Vec<ArcRenderCommand> =
commands
.iter()
.map(|c| -> Result<ArcRenderCommand, RenderPassError> {
Ok(match *c {
RenderCommand::SetBindGroup {
index,
num_dynamic_offsets,
bind_group_id,
} => {
if bind_group_id.is_none() {
return Ok(ArcRenderCommand::SetBindGroup {
index,
num_dynamic_offsets,
bind_group: None,
});
}
let bind_group_id = bind_group_id.unwrap();
let bg = bind_group_guard.get(bind_group_id).get().map_err(|e| {
RenderPassError {
scope: PassErrorScope::SetBindGroup,
inner: e.into(),
}
})?;
ArcRenderCommand::SetBindGroup {
index,
num_dynamic_offsets,
bind_group: Some(bg),
}
}
RenderCommand::SetPipeline(pipeline_id) => ArcRenderCommand::SetPipeline(
pipelines_guard.get(pipeline_id).get().map_err(|e| {
RenderPassError {
scope: PassErrorScope::SetPipelineRender,
inner: e.into(),
}
})?,
),
RenderCommand::SetPushConstant {
offset,
size_bytes,
values_offset,
stages,
} => ArcRenderCommand::SetPushConstant {
offset,
size_bytes,
values_offset,
stages,
},
RenderCommand::PushDebugGroup { color, len } => {
ArcRenderCommand::PushDebugGroup { color, len }
}
RenderCommand::PopDebugGroup => ArcRenderCommand::PopDebugGroup,
RenderCommand::InsertDebugMarker { color, len } => {
ArcRenderCommand::InsertDebugMarker { color, len }
}
RenderCommand::WriteTimestamp {
query_set_id,
query_index,
} => ArcRenderCommand::WriteTimestamp {
query_set: query_set_guard.get(query_set_id).get().map_err(|e| {
RenderPassError {
scope: PassErrorScope::WriteTimestamp,
inner: e.into(),
}
})?,
query_index,
},
RenderCommand::BeginPipelineStatisticsQuery {
query_set_id,
query_index,
} => ArcRenderCommand::BeginPipelineStatisticsQuery {
query_set: query_set_guard.get(query_set_id).get().map_err(|e| {
RenderPassError {
scope: PassErrorScope::BeginPipelineStatisticsQuery,
inner: e.into(),
}
})?,
query_index,
},
RenderCommand::EndPipelineStatisticsQuery => {
ArcRenderCommand::EndPipelineStatisticsQuery
}
RenderCommand::SetIndexBuffer {
buffer_id,
index_format,
offset,
size,
} => ArcRenderCommand::SetIndexBuffer {
buffer: buffers_guard.get(buffer_id).get().map_err(|e| {
RenderPassError {
scope: PassErrorScope::SetIndexBuffer,
inner: e.into(),
}
})?,
index_format,
offset,
size,
},
RenderCommand::SetVertexBuffer {
slot,
buffer_id,
offset,
size,
} => ArcRenderCommand::SetVertexBuffer {
slot,
buffer: buffers_guard.get(buffer_id).get().map_err(|e| {
RenderPassError {
scope: PassErrorScope::SetVertexBuffer,
inner: e.into(),
}
})?,
offset,
size,
},
RenderCommand::SetBlendConstant(color) => {
ArcRenderCommand::SetBlendConstant(color)
}
RenderCommand::SetStencilReference(reference) => {
ArcRenderCommand::SetStencilReference(reference)
}
RenderCommand::SetViewport {
rect,
depth_min,
depth_max,
} => ArcRenderCommand::SetViewport {
rect,
depth_min,
depth_max,
},
RenderCommand::SetScissor(scissor) => ArcRenderCommand::SetScissor(scissor),
RenderCommand::Draw {
vertex_count,
instance_count,
first_vertex,
first_instance,
} => ArcRenderCommand::Draw {
vertex_count,
instance_count,
first_vertex,
first_instance,
},
RenderCommand::DrawIndexed {
index_count,
instance_count,
first_index,
base_vertex,
first_instance,
} => ArcRenderCommand::DrawIndexed {
index_count,
instance_count,
first_index,
base_vertex,
first_instance,
},
RenderCommand::DrawIndirect {
buffer_id,
offset,
count,
indexed,
} => ArcRenderCommand::DrawIndirect {
buffer: buffers_guard.get(buffer_id).get().map_err(|e| {
RenderPassError {
scope: PassErrorScope::Draw {
kind: if count != 1 {
DrawKind::MultiDrawIndirect
} else {
DrawKind::DrawIndirect
},
indexed,
},
inner: e.into(),
}
})?,
offset,
count,
indexed,
vertex_or_index_limit: 0,
instance_limit: 0,
},
RenderCommand::MultiDrawIndirectCount {
buffer_id,
offset,
count_buffer_id,
count_buffer_offset,
max_count,
indexed,
} => {
let scope = PassErrorScope::Draw {
kind: DrawKind::MultiDrawIndirectCount,
indexed,
};
ArcRenderCommand::MultiDrawIndirectCount {
buffer: buffers_guard.get(buffer_id).get().map_err(|e| {
RenderPassError {
scope,
inner: e.into(),
}
})?,
offset,
count_buffer: buffers_guard.get(count_buffer_id).get().map_err(
|e| RenderPassError {
scope,
inner: e.into(),
},
)?,
count_buffer_offset,
max_count,
indexed,
}
}
RenderCommand::BeginOcclusionQuery { query_index } => {
ArcRenderCommand::BeginOcclusionQuery { query_index }
}
RenderCommand::EndOcclusionQuery => ArcRenderCommand::EndOcclusionQuery,
RenderCommand::ExecuteBundle(bundle) => ArcRenderCommand::ExecuteBundle(
render_bundles_guard.get(bundle).get().map_err(|e| {
RenderPassError {
scope: PassErrorScope::ExecuteBundle,
inner: e.into(),
}
})?,
),
})
})
.collect::<Result<Vec<_>, RenderPassError>>()?;
Ok(resolved_commands)
}
}
/// Equivalent to `RenderCommand` with the Ids resolved into resource Arcs.
#[doc(hidden)]
#[derive(Clone, Debug)]
pub enum ArcRenderCommand {
SetBindGroup {
index: u32,
num_dynamic_offsets: usize,
bind_group: Option<Arc<BindGroup>>,
},
SetPipeline(Arc<RenderPipeline>),
SetIndexBuffer {
buffer: Arc<Buffer>,
index_format: wgt::IndexFormat,
offset: BufferAddress,
size: Option<BufferSize>,
},
SetVertexBuffer {
slot: u32,
buffer: Arc<Buffer>,
offset: BufferAddress,
size: Option<BufferSize>,
},
SetBlendConstant(Color),
SetStencilReference(u32),
SetViewport {
rect: Rect<f32>,
depth_min: f32,
depth_max: f32,
},
SetScissor(Rect<u32>),
/// Set a range of push constants to values stored in [`BasePass::push_constant_data`].
///
/// See [`wgpu::RenderPass::set_push_constants`] for a detailed explanation
/// of the restrictions these commands must satisfy.
SetPushConstant {
/// Which stages we are setting push constant values for.
stages: wgt::ShaderStages,
/// The byte offset within the push constant storage to write to. This
/// must be a multiple of four.
offset: u32,
/// The number of bytes to write. This must be a multiple of four.
size_bytes: u32,
/// Index in [`BasePass::push_constant_data`] of the start of the data
/// to be written.
///
/// Note: this is not a byte offset like `offset`. Rather, it is the
/// index of the first `u32` element in `push_constant_data` to read.
///
/// `None` means zeros should be written to the destination range, and
/// there is no corresponding data in `push_constant_data`. This is used
/// by render bundles, which explicitly clear out any state that
/// post-bundle code might see.
values_offset: Option<u32>,
},
Draw {
vertex_count: u32,
instance_count: u32,
first_vertex: u32,
first_instance: u32,
},
DrawIndexed {
index_count: u32,
instance_count: u32,
first_index: u32,
base_vertex: i32,
first_instance: u32,
},
DrawIndirect {
buffer: Arc<Buffer>,
offset: BufferAddress,
count: u32,
indexed: bool,
/// This limit is only populated for commands in a [`RenderBundle`].
vertex_or_index_limit: u64,
/// This limit is only populated for commands in a [`RenderBundle`].
instance_limit: u64,
},
MultiDrawIndirectCount {
buffer: Arc<Buffer>,
offset: BufferAddress,
count_buffer: Arc<Buffer>,
count_buffer_offset: BufferAddress,
max_count: u32,
indexed: bool,
},
PushDebugGroup {
#[cfg_attr(not(any(feature = "serde", feature = "replay")), allow(dead_code))]
color: u32,
len: usize,
},
PopDebugGroup,
InsertDebugMarker {
#[cfg_attr(not(any(feature = "serde", feature = "replay")), allow(dead_code))]
color: u32,
len: usize,
},
WriteTimestamp {
query_set: Arc<QuerySet>,
query_index: u32,
},
BeginOcclusionQuery {
query_index: u32,
},
EndOcclusionQuery,
BeginPipelineStatisticsQuery {
query_set: Arc<QuerySet>,
query_index: u32,
},
EndPipelineStatisticsQuery,
ExecuteBundle(Arc<RenderBundle>),
}