forked from mirrors/gecko-dev
112 lines
3.3 KiB
C++
112 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Instance.h"
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#include "Adapter.h"
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#include "nsIGlobalObject.h"
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#include "ipc/WebGPUChild.h"
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#include "ipc/WebGPUTypes.h"
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#include "mozilla/webgpu/ffi/wgpu.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/gfx/CanvasManagerChild.h"
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#include "mozilla/gfx/gfxVars.h"
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#include <optional>
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#include <string_view>
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namespace mozilla::webgpu {
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GPU_IMPL_CYCLE_COLLECTION(Instance, mOwner)
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static inline nsDependentCString ToCString(const std::string_view s) {
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return {s.data(), s.length()};
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}
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/*static*/
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already_AddRefed<Instance> Instance::Create(nsIGlobalObject* aOwner) {
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RefPtr<Instance> result = new Instance(aOwner);
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return result.forget();
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}
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Instance::Instance(nsIGlobalObject* aOwner) : mOwner(aOwner) {}
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Instance::~Instance() { Cleanup(); }
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void Instance::Cleanup() {}
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JSObject* Instance::WrapObject(JSContext* cx,
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JS::Handle<JSObject*> givenProto) {
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return dom::GPU_Binding::Wrap(cx, this, givenProto);
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}
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already_AddRefed<dom::Promise> Instance::RequestAdapter(
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const dom::GPURequestAdapterOptions& aOptions, ErrorResult& aRv) {
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RefPtr<dom::Promise> promise = dom::Promise::Create(mOwner, aRv);
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if (NS_WARN_IF(aRv.Failed())) {
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return nullptr;
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}
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// -
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// Check if we should allow the request.
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const auto errStr = [&]() -> std::optional<std::string_view> {
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#ifdef RELEASE_OR_BETA
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if (true) {
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return "WebGPU is not yet available in Release or Beta builds.";
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}
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#endif
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if (!gfx::gfxVars::AllowWebGPU()) {
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return "WebGPU is disabled by blocklist.";
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}
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if (!StaticPrefs::dom_webgpu_enabled()) {
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return "WebGPU is disabled by dom.webgpu.enabled:false.";
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}
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return {};
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}();
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if (errStr) {
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promise->MaybeRejectWithNotSupportedError(ToCString(*errStr));
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return promise.forget();
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}
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// -
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// Make the request.
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auto* const canvasManager = gfx::CanvasManagerChild::Get();
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if (!canvasManager) {
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promise->MaybeRejectWithInvalidStateError(
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"Failed to create CanavasManagerChild");
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return promise.forget();
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}
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RefPtr<WebGPUChild> bridge = canvasManager->GetWebGPUChild();
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if (!bridge) {
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promise->MaybeRejectWithInvalidStateError("Failed to create WebGPUChild");
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return promise.forget();
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}
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RefPtr<Instance> instance = this;
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bridge->InstanceRequestAdapter(aOptions)->Then(
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GetCurrentSerialEventTarget(), __func__,
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[promise, instance, bridge](ipc::ByteBuf aInfoBuf) {
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auto info = std::make_shared<ffi::WGPUAdapterInformation>();
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ffi::wgpu_client_adapter_extract_info(ToFFI(&aInfoBuf), info.get());
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MOZ_ASSERT(info->id != 0);
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RefPtr<Adapter> adapter = new Adapter(instance, bridge, info);
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promise->MaybeResolve(adapter);
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},
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[promise](const Maybe<ipc::ResponseRejectReason>& aResponseReason) {
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if (aResponseReason.isSome()) {
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promise->MaybeRejectWithAbortError("Internal communication error!");
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} else {
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promise->MaybeResolve(JS::NullHandleValue);
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}
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});
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return promise.forget();
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}
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} // namespace mozilla::webgpu
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