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use crate::{
binding_model,
hub::Hub,
id::{BindGroupLayoutId, PipelineLayoutId},
resource::{
Buffer, BufferAccessError, BufferAccessResult, BufferMapOperation, Labeled,
ResourceErrorIdent,
},
snatch::SnatchGuard,
Label, DOWNLEVEL_ERROR_MESSAGE,
};
use arrayvec::ArrayVec;
use smallvec::SmallVec;
use std::os::raw::c_char;
use thiserror::Error;
use wgt::{BufferAddress, DeviceLostReason, TextureFormat};
use std::num::NonZeroU32;
pub(crate) mod bgl;
pub mod global;
mod life;
pub mod queue;
pub mod resource;
#[cfg(any(feature = "trace", feature = "replay"))]
pub mod trace;
pub use {life::WaitIdleError, resource::Device};
pub const SHADER_STAGE_COUNT: usize = hal::MAX_CONCURRENT_SHADER_STAGES;
// Should be large enough for the largest possible texture row. This
// value is enough for a 16k texture with float4 format.
pub(crate) const ZERO_BUFFER_SIZE: BufferAddress = 512 << 10;
// If a submission is not completed within this time, we go off into UB land.
const CLEANUP_WAIT_MS: u32 = 60000;
const ENTRYPOINT_FAILURE_ERROR: &str = "The given EntryPoint is Invalid";
pub type DeviceDescriptor<'a> = wgt::DeviceDescriptor<Label<'a>>;
#[repr(C)]
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub enum HostMap {
Read,
Write,
}
#[derive(Clone, Debug, Hash, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
pub(crate) struct AttachmentData<T> {
pub colors: ArrayVec<Option<T>, { hal::MAX_COLOR_ATTACHMENTS }>,
pub resolves: ArrayVec<T, { hal::MAX_COLOR_ATTACHMENTS }>,
pub depth_stencil: Option<T>,
}
impl<T: PartialEq> Eq for AttachmentData<T> {}
#[derive(Clone, Debug, Hash, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
pub(crate) struct RenderPassContext {
pub attachments: AttachmentData<TextureFormat>,
pub sample_count: u32,
pub multiview: Option<NonZeroU32>,
}
#[derive(Clone, Debug, Error)]
#[non_exhaustive]
pub enum RenderPassCompatibilityError {
#[error(
"Incompatible color attachments at indices {indices:?}: the RenderPass uses textures with formats {expected:?} but the {res} uses attachments with formats {actual:?}",
)]
IncompatibleColorAttachment {
indices: Vec<usize>,
expected: Vec<Option<TextureFormat>>,
actual: Vec<Option<TextureFormat>>,
res: ResourceErrorIdent,
},
#[error(
"Incompatible depth-stencil attachment format: the RenderPass uses a texture with format {expected:?} but the {res} uses an attachment with format {actual:?}",
)]
IncompatibleDepthStencilAttachment {
expected: Option<TextureFormat>,
actual: Option<TextureFormat>,
res: ResourceErrorIdent,
},
#[error(
"Incompatible sample count: the RenderPass uses textures with sample count {expected:?} but the {res} uses attachments with format {actual:?}",
)]
IncompatibleSampleCount {
expected: u32,
actual: u32,
res: ResourceErrorIdent,
},
#[error("Incompatible multiview setting: the RenderPass uses setting {expected:?} but the {res} uses setting {actual:?}")]
IncompatibleMultiview {
expected: Option<NonZeroU32>,
actual: Option<NonZeroU32>,
res: ResourceErrorIdent,
},
}
impl RenderPassContext {
// Assumes the renderpass only contains one subpass
pub(crate) fn check_compatible<T: Labeled>(
&self,
other: &Self,
res: &T,
) -> Result<(), RenderPassCompatibilityError> {
if self.attachments.colors != other.attachments.colors {
let indices = self
.attachments
.colors
.iter()
.zip(&other.attachments.colors)
.enumerate()
.filter_map(|(idx, (left, right))| (left != right).then_some(idx))
.collect();
return Err(RenderPassCompatibilityError::IncompatibleColorAttachment {
indices,
expected: self.attachments.colors.iter().cloned().collect(),
actual: other.attachments.colors.iter().cloned().collect(),
res: res.error_ident(),
});
}
if self.attachments.depth_stencil != other.attachments.depth_stencil {
return Err(
RenderPassCompatibilityError::IncompatibleDepthStencilAttachment {
expected: self.attachments.depth_stencil,
actual: other.attachments.depth_stencil,
res: res.error_ident(),
},
);
}
if self.sample_count != other.sample_count {
return Err(RenderPassCompatibilityError::IncompatibleSampleCount {
expected: self.sample_count,
actual: other.sample_count,
res: res.error_ident(),
});
}
if self.multiview != other.multiview {
return Err(RenderPassCompatibilityError::IncompatibleMultiview {
expected: self.multiview,
actual: other.multiview,
res: res.error_ident(),
});
}
Ok(())
}
}
pub type BufferMapPendingClosure = (BufferMapOperation, BufferAccessResult);
#[derive(Default)]
pub struct UserClosures {
pub mappings: Vec<BufferMapPendingClosure>,
pub submissions: SmallVec<[queue::SubmittedWorkDoneClosure; 1]>,
pub device_lost_invocations: SmallVec<[DeviceLostInvocation; 1]>,
}
impl UserClosures {
fn extend(&mut self, other: Self) {
self.mappings.extend(other.mappings);
self.submissions.extend(other.submissions);
self.device_lost_invocations
.extend(other.device_lost_invocations);
}
fn fire(self) {
// Note: this logic is specifically moved out of `handle_mapping()` in order to
// have nothing locked by the time we execute users callback code.
// Mappings _must_ be fired before submissions, as the spec requires all mapping callbacks that are registered before
// a on_submitted_work_done callback to be fired before the on_submitted_work_done callback.
for (mut operation, status) in self.mappings {
if let Some(callback) = operation.callback.take() {
callback.call(status);
}
}
for closure in self.submissions {
closure.call();
}
for invocation in self.device_lost_invocations {
invocation
.closure
.call(invocation.reason, invocation.message);
}
}
}
#[cfg(send_sync)]
pub type DeviceLostCallback = Box<dyn Fn(DeviceLostReason, String) + Send + 'static>;
#[cfg(not(send_sync))]
pub type DeviceLostCallback = Box<dyn Fn(DeviceLostReason, String) + 'static>;
pub struct DeviceLostClosureRust {
pub callback: DeviceLostCallback,
consumed: bool,
}
impl Drop for DeviceLostClosureRust {
fn drop(&mut self) {
if !self.consumed {
panic!("DeviceLostClosureRust must be consumed before it is dropped.");
}
}
}
#[repr(C)]
pub struct DeviceLostClosureC {
pub callback: unsafe extern "C" fn(user_data: *mut u8, reason: u8, message: *const c_char),
pub user_data: *mut u8,
consumed: bool,
}
#[cfg(send_sync)]
unsafe impl Send for DeviceLostClosureC {}
impl Drop for DeviceLostClosureC {
fn drop(&mut self) {
if !self.consumed {
panic!("DeviceLostClosureC must be consumed before it is dropped.");
}
}
}
pub struct DeviceLostClosure {
// We wrap this so creating the enum in the C variant can be unsafe,
// allowing our call function to be safe.
inner: DeviceLostClosureInner,
}
pub struct DeviceLostInvocation {
closure: DeviceLostClosure,
reason: DeviceLostReason,
message: String,
}
enum DeviceLostClosureInner {
Rust { inner: DeviceLostClosureRust },
C { inner: DeviceLostClosureC },
}
impl DeviceLostClosure {
pub fn from_rust(callback: DeviceLostCallback) -> Self {
let inner = DeviceLostClosureRust {
callback,
consumed: false,
};
Self {
inner: DeviceLostClosureInner::Rust { inner },
}
}
/// # Safety
///
/// - The callback pointer must be valid to call with the provided `user_data`
/// pointer.
///
/// - Both pointers must point to `'static` data, as the callback may happen at
/// an unspecified time.
pub unsafe fn from_c(mut closure: DeviceLostClosureC) -> Self {
// Build an inner with the values from closure, ensuring that
// inner.consumed is false.
let inner = DeviceLostClosureC {
callback: closure.callback,
user_data: closure.user_data,
consumed: false,
};
// Mark the original closure as consumed, so we can safely drop it.
closure.consumed = true;
Self {
inner: DeviceLostClosureInner::C { inner },
}
}
pub(crate) fn call(self, reason: DeviceLostReason, message: String) {
match self.inner {
DeviceLostClosureInner::Rust { mut inner } => {
inner.consumed = true;
(inner.callback)(reason, message)
}
// SAFETY: the contract of the call to from_c says that this unsafe is sound.
DeviceLostClosureInner::C { mut inner } => unsafe {
inner.consumed = true;
// Ensure message is structured as a null-terminated C string. It only
// needs to live as long as the callback invocation.
let message = std::ffi::CString::new(message).unwrap();
(inner.callback)(inner.user_data, reason as u8, message.as_ptr())
},
}
}
}
fn map_buffer(
raw: &dyn hal::DynDevice,
buffer: &Buffer,
offset: BufferAddress,
size: BufferAddress,
kind: HostMap,
snatch_guard: &SnatchGuard,
) -> Result<hal::BufferMapping, BufferAccessError> {
let raw_buffer = buffer.try_raw(snatch_guard)?;
let mapping = unsafe {
raw.map_buffer(raw_buffer, offset..offset + size)
.map_err(|e| buffer.device.handle_hal_error(e))?
};
if !mapping.is_coherent && kind == HostMap::Read {
#[allow(clippy::single_range_in_vec_init)]
unsafe {
raw.invalidate_mapped_ranges(raw_buffer, &[offset..offset + size]);
}
}
assert_eq!(offset % wgt::COPY_BUFFER_ALIGNMENT, 0);
assert_eq!(size % wgt::COPY_BUFFER_ALIGNMENT, 0);
// Zero out uninitialized parts of the mapping. (Spec dictates all resources
// behave as if they were initialized with zero)
//
// If this is a read mapping, ideally we would use a `clear_buffer` command
// before reading the data from GPU (i.e. `invalidate_range`). However, this
// would require us to kick off and wait for a command buffer or piggy back
// on an existing one (the later is likely the only worthwhile option). As
// reading uninitialized memory isn't a particular important path to
// support, we instead just initialize the memory here and make sure it is
// GPU visible, so this happens at max only once for every buffer region.
//
// If this is a write mapping zeroing out the memory here is the only
// reasonable way as all data is pushed to GPU anyways.
let mapped = unsafe { std::slice::from_raw_parts_mut(mapping.ptr.as_ptr(), size as usize) };
// We can't call flush_mapped_ranges in this case, so we can't drain the uninitialized ranges either
if !mapping.is_coherent
&& kind == HostMap::Read
&& !buffer.usage.contains(wgt::BufferUsages::MAP_WRITE)
{
for uninitialized in buffer
.initialization_status
.write()
.uninitialized(offset..(size + offset))
{
// The mapping's pointer is already offset, however we track the
// uninitialized range relative to the buffer's start.
let fill_range =
(uninitialized.start - offset) as usize..(uninitialized.end - offset) as usize;
mapped[fill_range].fill(0);
}
} else {
for uninitialized in buffer
.initialization_status
.write()
.drain(offset..(size + offset))
{
// The mapping's pointer is already offset, however we track the
// uninitialized range relative to the buffer's start.
let fill_range =
(uninitialized.start - offset) as usize..(uninitialized.end - offset) as usize;
mapped[fill_range].fill(0);
// NOTE: This is only possible when MAPPABLE_PRIMARY_BUFFERS is enabled.
if !mapping.is_coherent
&& kind == HostMap::Read
&& buffer.usage.contains(wgt::BufferUsages::MAP_WRITE)
{
unsafe { raw.flush_mapped_ranges(raw_buffer, &[uninitialized]) };
}
}
}
Ok(mapping)
}
#[derive(Clone, Debug)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct DeviceMismatch {
pub(super) res: ResourceErrorIdent,
pub(super) res_device: ResourceErrorIdent,
pub(super) target: Option<ResourceErrorIdent>,
pub(super) target_device: ResourceErrorIdent,
}
impl std::fmt::Display for DeviceMismatch {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
write!(
f,
"{} of {} doesn't match {}",
self.res_device, self.res, self.target_device
)?;
if let Some(target) = self.target.as_ref() {
write!(f, " of {target}")?;
}
Ok(())
}
}
impl std::error::Error for DeviceMismatch {}
#[derive(Clone, Debug, Error)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[non_exhaustive]
pub enum DeviceError {
#[error("{0} is invalid.")]
Invalid(ResourceErrorIdent),
#[error("Parent device is lost")]
Lost,
#[error("Not enough memory left.")]
OutOfMemory,
#[error("Creation of a resource failed for a reason other than running out of memory.")]
ResourceCreationFailed,
#[error(transparent)]
DeviceMismatch(#[from] Box<DeviceMismatch>),
}
impl DeviceError {
/// Only use this function in contexts where there is no `Device`.
///
/// Use [`Device::handle_hal_error`] otherwise.
pub fn from_hal(error: hal::DeviceError) -> Self {
match error {
hal::DeviceError::Lost => Self::Lost,
hal::DeviceError::OutOfMemory => Self::OutOfMemory,
hal::DeviceError::ResourceCreationFailed => Self::ResourceCreationFailed,
hal::DeviceError::Unexpected => Self::Lost,
}
}
}
#[derive(Clone, Debug, Error)]
#[error("Features {0:?} are required but not enabled on the device")]
pub struct MissingFeatures(pub wgt::Features);
#[derive(Clone, Debug, Error)]
#[error(
"Downlevel flags {0:?} are required but not supported on the device.\n{}",
DOWNLEVEL_ERROR_MESSAGE
)]
pub struct MissingDownlevelFlags(pub wgt::DownlevelFlags);
#[derive(Clone, Debug)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct ImplicitPipelineContext {
pub root_id: PipelineLayoutId,
pub group_ids: ArrayVec<BindGroupLayoutId, { hal::MAX_BIND_GROUPS }>,
}
pub struct ImplicitPipelineIds<'a> {
pub root_id: PipelineLayoutId,
pub group_ids: &'a [BindGroupLayoutId],
}
impl ImplicitPipelineIds<'_> {
fn prepare(self, hub: &Hub) -> ImplicitPipelineContext {
ImplicitPipelineContext {
root_id: hub.pipeline_layouts.prepare(Some(self.root_id)).id(),
group_ids: self
.group_ids
.iter()
.map(|id_in| hub.bind_group_layouts.prepare(Some(*id_in)).id())
.collect(),
}
}
}
/// Create a validator with the given validation flags.
pub fn create_validator(
features: wgt::Features,
downlevel: wgt::DownlevelFlags,
flags: naga::valid::ValidationFlags,
) -> naga::valid::Validator {
use naga::valid::Capabilities as Caps;
let mut caps = Caps::empty();
caps.set(
Caps::PUSH_CONSTANT,
features.contains(wgt::Features::PUSH_CONSTANTS),
);
caps.set(Caps::FLOAT64, features.contains(wgt::Features::SHADER_F64));
caps.set(
Caps::PRIMITIVE_INDEX,
features.contains(wgt::Features::SHADER_PRIMITIVE_INDEX),
);
caps.set(
Caps::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING,
features
.contains(wgt::Features::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING),
);
caps.set(
Caps::UNIFORM_BUFFER_AND_STORAGE_TEXTURE_ARRAY_NON_UNIFORM_INDEXING,
features
.contains(wgt::Features::UNIFORM_BUFFER_AND_STORAGE_TEXTURE_ARRAY_NON_UNIFORM_INDEXING),
);
// TODO: This needs a proper wgpu feature
caps.set(
Caps::SAMPLER_NON_UNIFORM_INDEXING,
features
.contains(wgt::Features::SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING),
);
caps.set(
Caps::STORAGE_TEXTURE_16BIT_NORM_FORMATS,
features.contains(wgt::Features::TEXTURE_FORMAT_16BIT_NORM),
);
caps.set(Caps::MULTIVIEW, features.contains(wgt::Features::MULTIVIEW));
caps.set(
Caps::EARLY_DEPTH_TEST,
features.contains(wgt::Features::SHADER_EARLY_DEPTH_TEST),
);
caps.set(
Caps::SHADER_INT64,
features.contains(wgt::Features::SHADER_INT64),
);
caps.set(
Caps::SHADER_INT64_ATOMIC_MIN_MAX,
features.intersects(
wgt::Features::SHADER_INT64_ATOMIC_MIN_MAX | wgt::Features::SHADER_INT64_ATOMIC_ALL_OPS,
),
);
caps.set(
Caps::SHADER_INT64_ATOMIC_ALL_OPS,
features.contains(wgt::Features::SHADER_INT64_ATOMIC_ALL_OPS),
);
caps.set(
Caps::MULTISAMPLED_SHADING,
downlevel.contains(wgt::DownlevelFlags::MULTISAMPLED_SHADING),
);
caps.set(
Caps::DUAL_SOURCE_BLENDING,
features.contains(wgt::Features::DUAL_SOURCE_BLENDING),
);
caps.set(
Caps::CUBE_ARRAY_TEXTURES,
downlevel.contains(wgt::DownlevelFlags::CUBE_ARRAY_TEXTURES),
);
caps.set(
Caps::SUBGROUP,
features.intersects(wgt::Features::SUBGROUP | wgt::Features::SUBGROUP_VERTEX),
);
caps.set(
Caps::SUBGROUP_BARRIER,
features.intersects(wgt::Features::SUBGROUP_BARRIER),
);
caps.set(
Caps::SUBGROUP_VERTEX_STAGE,
features.contains(wgt::Features::SUBGROUP_VERTEX),
);
naga::valid::Validator::new(flags, caps)
}