| // Copyright 2021 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <filesystem> |
| #include <string> |
| #include <tuple> |
| #include <utility> |
| #include <vector> |
| |
| #include "dawn/dawn_proc.h" |
| #include "src/dawn/node/binding/Flags.h" |
| #include "src/dawn/node/binding/GPU.h" |
| #include "tint/tint.h" |
| |
| #ifdef DAWN_EMIT_COVERAGE |
| extern "C" { |
| void __llvm_profile_reset_counters(void); |
| void __llvm_profile_set_filename(const char*); |
| int __llvm_profile_write_file(void); |
| } |
| #endif // DAWN_EMIT_COVERAGE |
| |
| namespace { |
| Napi::Value CreateGPU(const Napi::CallbackInfo& info) { |
| const auto& env = info.Env(); |
| |
| std::tuple<std::vector<std::string>> args; |
| auto res = wgpu::interop::FromJS(info, args); |
| if (res != wgpu::interop::Success) { |
| Napi::Error::New(env, res.error).ThrowAsJavaScriptException(); |
| return env.Undefined(); |
| } |
| |
| wgpu::binding::Flags flags; |
| |
| // Parse out the key=value flags out of the input args array |
| for (const auto& arg : std::get<0>(args)) { |
| const size_t sep_index = arg.find("="); |
| if (sep_index == std::string::npos) { |
| Napi::Error::New(env, "Flags expected argument format is <key>=<value>") |
| .ThrowAsJavaScriptException(); |
| return env.Undefined(); |
| } |
| flags.Set(arg.substr(0, sep_index), arg.substr(sep_index + 1)); |
| } |
| |
| // Construct a wgpu::interop::GPU interface, implemented by wgpu::bindings::GPU. |
| return wgpu::interop::GPU::Create<wgpu::binding::GPU>(env, std::move(flags)); |
| } |
| |
| #ifdef DAWN_EMIT_COVERAGE |
| struct Coverage { |
| Coverage() : output_path_{GetOutputPath()} { |
| __llvm_profile_set_filename(output_path_.string().c_str()); |
| } |
| ~Coverage() { std::filesystem::remove(output_path_); } |
| |
| static void Begin(const Napi::CallbackInfo& info) { |
| auto* coverage = static_cast<Coverage*>(info.Data()); |
| std::filesystem::remove(coverage->output_path_); |
| __llvm_profile_reset_counters(); |
| } |
| |
| static Napi::Value End(const Napi::CallbackInfo& info) { |
| __llvm_profile_write_file(); |
| auto* coverage = static_cast<Coverage*>(info.Data()); |
| return Napi::String::New(info.Env(), coverage->output_path_.string().c_str()); |
| } |
| |
| private: |
| static std::filesystem::path GetOutputPath() { return std::tmpnam(nullptr); } |
| |
| std::filesystem::path output_path_; |
| }; |
| #endif // DAWN_EMIT_COVERAGE |
| |
| } // namespace |
| |
| // Initialize() initializes the Dawn node module, registering all the WebGPU |
| // types into the global object, and adding the 'create' function on the exported |
| // object. |
| Napi::Object Initialize(Napi::Env env, Napi::Object exports) { |
| // Initialize Tint |
| tint::Initialize(); |
| |
| // Set all the Dawn procedure function pointers. |
| dawnProcSetProcs(&dawn::native::GetProcs()); |
| |
| // Register all the interop types |
| wgpu::interop::Initialize(env); |
| |
| // Export function that creates and returns the wgpu::interop::GPU interface |
| exports.Set(Napi::String::New(env, "create"), Napi::Function::New<CreateGPU>(env)); |
| |
| #ifdef DAWN_EMIT_COVERAGE |
| Coverage* coverage = new Coverage(); |
| auto coverage_provider = Napi::Object::New(env); |
| coverage_provider.Set("begin", Napi::Function::New(env, &Coverage::Begin, nullptr, coverage)); |
| coverage_provider.Set("end", Napi::Function::New(env, &Coverage::End, nullptr, coverage)); |
| coverage_provider.AddFinalizer([](const Napi::Env&, Coverage* c) { delete c; }, coverage); |
| exports.Set(Napi::String::New(env, "coverage"), coverage_provider); |
| #endif // DAWN_EMIT_COVERAGE |
| |
| return exports; |
| } |
| |
| NODE_API_MODULE(addon, Initialize) |