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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use crate::dom::bindings::cell::DomRefCell;
use crate::dom::bindings::codegen::Bindings::GPUCommandEncoderBinding::{
GPUCommandBufferDescriptor, GPUCommandEncoderMethods, GPUComputePassDescriptor,
};
use crate::dom::bindings::reflector::DomObject;
use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
use crate::dom::bindings::root::DomRoot;
use crate::dom::bindings::str::DOMString;
use crate::dom::globalscope::GlobalScope;
use crate::dom::gpubuffer::GPUBuffer;
use crate::dom::gpucommandbuffer::GPUCommandBuffer;
use crate::dom::gpucomputepassencoder::GPUComputePassEncoder;
use dom_struct::dom_struct;
use ipc_channel::ipc;
use std::collections::HashSet;
use webgpu::{WebGPU, WebGPUCommandEncoder, WebGPURequest};
#[dom_struct]
pub struct GPUCommandEncoder {
reflector_: Reflector,
#[ignore_malloc_size_of = "defined in webgpu"]
channel: WebGPU,
label: DomRefCell<Option<DOMString>>,
encoder: WebGPUCommandEncoder,
buffers: DomRefCell<HashSet<DomRoot<GPUBuffer>>>,
}
impl GPUCommandEncoder {
pub fn new_inherited(channel: WebGPU, encoder: WebGPUCommandEncoder) -> GPUCommandEncoder {
GPUCommandEncoder {
channel,
reflector_: Reflector::new(),
label: DomRefCell::new(None),
encoder,
buffers: DomRefCell::new(HashSet::new()),
}
}
pub fn new(
global: &GlobalScope,
channel: WebGPU,
encoder: WebGPUCommandEncoder,
) -> DomRoot<GPUCommandEncoder> {
reflect_dom_object(
Box::new(GPUCommandEncoder::new_inherited(channel, encoder)),
global,
)
}
}
impl GPUCommandEncoderMethods for GPUCommandEncoder {
/// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
fn GetLabel(&self) -> Option<DOMString> {
self.label.borrow().clone()
}
/// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
fn SetLabel(&self, value: Option<DOMString>) {
*self.label.borrow_mut() = value;
}
/// https://gpuweb.github.io/gpuweb/#dom-gpucommandencoder-begincomputepass
fn BeginComputePass(
&self,
_descriptor: &GPUComputePassDescriptor,
) -> DomRoot<GPUComputePassEncoder> {
GPUComputePassEncoder::new(&self.global(), self.channel.clone(), self.encoder)
}
/// https://gpuweb.github.io/gpuweb/#dom-gpucommandencoder-copybuffertobuffer
fn CopyBufferToBuffer(
&self,
source: &GPUBuffer,
source_offset: u64,
destination: &GPUBuffer,
destination_offset: u64,
size: u64,
) {
self.buffers.borrow_mut().insert(DomRoot::from_ref(source));
self.buffers
.borrow_mut()
.insert(DomRoot::from_ref(destination));
self.channel
.0
.send(WebGPURequest::CopyBufferToBuffer {
command_encoder_id: self.encoder.0,
source_id: source.id().0,
source_offset,
destination_id: destination.id().0,
destination_offset,
size,
})
.expect("Failed to send CopyBufferToBuffer");
}
/// https://gpuweb.github.io/gpuweb/#dom-gpucommandencoder-finish
fn Finish(&self, _descriptor: &GPUCommandBufferDescriptor) -> DomRoot<GPUCommandBuffer> {
let (sender, receiver) = ipc::channel().unwrap();
self.channel
.0
.send(WebGPURequest::CommandEncoderFinish {
sender,
command_encoder_id: self.encoder.0,
// TODO(zakorgy): We should use `_descriptor` here after it's not empty
// and the underlying wgpu-core struct is serializable
})
.expect("Failed to send Finish");
let buffer = receiver.recv().unwrap();
GPUCommandBuffer::new(
&self.global(),
self.channel.clone(),
buffer,
self.buffers.borrow_mut().drain().collect(),
)
}
}
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