mirror of
https://github.com/denoland/deno.git
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229 lines
6.1 KiB
Rust
229 lines
6.1 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::type_error;
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use deno_core::error::AnyError;
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use deno_core::futures::channel::oneshot;
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use deno_core::OpState;
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use deno_core::Resource;
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use deno_core::ResourceId;
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use deno_core::ZeroCopyBuf;
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use serde::Deserialize;
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use std::borrow::Cow;
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use std::cell::RefCell;
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use std::rc::Rc;
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use std::time::Duration;
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use super::error::DomExceptionOperationError;
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use super::error::WebGpuResult;
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pub(crate) struct WebGpuBuffer(pub(crate) wgpu_core::id::BufferId);
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impl Resource for WebGpuBuffer {
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fn name(&self) -> Cow<str> {
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"webGPUBuffer".into()
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}
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}
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struct WebGpuBufferMapped(*mut u8, usize);
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impl Resource for WebGpuBufferMapped {
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fn name(&self) -> Cow<str> {
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"webGPUBufferMapped".into()
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}
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}
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#[derive(Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct CreateBufferArgs {
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device_rid: ResourceId,
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label: Option<String>,
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size: u64,
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usage: u32,
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mapped_at_creation: bool,
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}
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pub fn op_webgpu_create_buffer(
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state: &mut OpState,
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args: CreateBufferArgs,
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_: (),
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) -> Result<WebGpuResult, AnyError> {
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let instance = state.borrow::<super::Instance>();
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let device_resource = state
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.resource_table
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.get::<super::WebGpuDevice>(args.device_rid)?;
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let device = device_resource.0;
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let descriptor = wgpu_core::resource::BufferDescriptor {
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label: args.label.map(Cow::from),
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size: args.size,
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usage: wgpu_types::BufferUsages::from_bits(args.usage)
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.ok_or_else(|| type_error("usage is not valid"))?,
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mapped_at_creation: args.mapped_at_creation,
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};
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gfx_put!(device => instance.device_create_buffer(
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device,
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&descriptor,
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std::marker::PhantomData
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) => state, WebGpuBuffer)
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}
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#[derive(Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct BufferGetMapAsyncArgs {
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buffer_rid: ResourceId,
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device_rid: ResourceId,
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mode: u32,
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offset: u64,
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size: u64,
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}
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pub async fn op_webgpu_buffer_get_map_async(
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state: Rc<RefCell<OpState>>,
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args: BufferGetMapAsyncArgs,
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_: (),
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) -> Result<WebGpuResult, AnyError> {
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let (sender, receiver) = oneshot::channel::<Result<(), AnyError>>();
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let device;
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{
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let state_ = state.borrow();
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let instance = state_.borrow::<super::Instance>();
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let buffer_resource =
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state_.resource_table.get::<WebGpuBuffer>(args.buffer_rid)?;
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let buffer = buffer_resource.0;
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let device_resource = state_
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.resource_table
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.get::<super::WebGpuDevice>(args.device_rid)?;
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device = device_resource.0;
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let boxed_sender = Box::new(sender);
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let sender_ptr = Box::into_raw(boxed_sender) as *mut u8;
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extern "C" fn buffer_map_future_wrapper(
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status: wgpu_core::resource::BufferMapAsyncStatus,
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user_data: *mut u8,
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) {
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let sender_ptr = user_data as *mut oneshot::Sender<Result<(), AnyError>>;
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let boxed_sender = unsafe { Box::from_raw(sender_ptr) };
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boxed_sender
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.send(match status {
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wgpu_core::resource::BufferMapAsyncStatus::Success => Ok(()),
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_ => unreachable!(), // TODO
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})
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.unwrap();
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}
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// TODO(lucacasonato): error handling
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let maybe_err = gfx_select!(buffer => instance.buffer_map_async(
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buffer,
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args.offset..(args.offset + args.size),
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wgpu_core::resource::BufferMapOperation {
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host: match args.mode {
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1 => wgpu_core::device::HostMap::Read,
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2 => wgpu_core::device::HostMap::Write,
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_ => unreachable!(),
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},
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callback: buffer_map_future_wrapper,
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user_data: sender_ptr,
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}
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))
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.err();
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if maybe_err.is_some() {
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return Ok(WebGpuResult::maybe_err(maybe_err));
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}
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}
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let done = Rc::new(RefCell::new(false));
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let done_ = done.clone();
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let device_poll_fut = async move {
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while !*done.borrow() {
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{
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let state = state.borrow();
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let instance = state.borrow::<super::Instance>();
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gfx_select!(device => instance.device_poll(device, false)).unwrap()
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}
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tokio::time::sleep(Duration::from_millis(10)).await;
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}
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Ok::<(), AnyError>(())
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};
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let receiver_fut = async move {
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receiver.await??;
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let mut done = done_.borrow_mut();
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*done = true;
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Ok::<(), AnyError>(())
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};
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tokio::try_join!(device_poll_fut, receiver_fut)?;
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Ok(WebGpuResult::empty())
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}
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#[derive(Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct BufferGetMappedRangeArgs {
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buffer_rid: ResourceId,
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offset: u64,
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size: Option<u64>,
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}
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pub fn op_webgpu_buffer_get_mapped_range(
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state: &mut OpState,
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args: BufferGetMappedRangeArgs,
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mut zero_copy: ZeroCopyBuf,
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) -> Result<WebGpuResult, AnyError> {
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let instance = state.borrow::<super::Instance>();
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let buffer_resource =
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state.resource_table.get::<WebGpuBuffer>(args.buffer_rid)?;
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let buffer = buffer_resource.0;
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let (slice_pointer, range_size) =
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gfx_select!(buffer => instance.buffer_get_mapped_range(
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buffer,
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args.offset,
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args.size
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))
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.map_err(|e| DomExceptionOperationError::new(&e.to_string()))?;
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let slice = unsafe {
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std::slice::from_raw_parts_mut(slice_pointer, range_size as usize)
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};
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zero_copy.copy_from_slice(slice);
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let rid = state
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.resource_table
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.add(WebGpuBufferMapped(slice_pointer, range_size as usize));
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Ok(WebGpuResult::rid(rid))
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}
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#[derive(Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct BufferUnmapArgs {
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buffer_rid: ResourceId,
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mapped_rid: ResourceId,
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}
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pub fn op_webgpu_buffer_unmap(
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state: &mut OpState,
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args: BufferUnmapArgs,
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zero_copy: Option<ZeroCopyBuf>,
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) -> Result<WebGpuResult, AnyError> {
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let mapped_resource = state
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.resource_table
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.take::<WebGpuBufferMapped>(args.mapped_rid)?;
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let instance = state.borrow::<super::Instance>();
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let buffer_resource =
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state.resource_table.get::<WebGpuBuffer>(args.buffer_rid)?;
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let buffer = buffer_resource.0;
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let slice_pointer = mapped_resource.0;
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let size = mapped_resource.1;
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if let Some(buffer) = zero_copy {
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let slice = unsafe { std::slice::from_raw_parts_mut(slice_pointer, size) };
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slice.copy_from_slice(&buffer);
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}
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gfx_ok!(buffer => instance.buffer_unmap(buffer))
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}
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