| // Copyright 2021 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <fuchsia/vulkan/loader/cpp/fidl.h> |
| #include <lib/async-loop/cpp/loop.h> |
| #include <lib/async-loop/default.h> |
| #include <lib/fdio/directory.h> |
| #include <lib/fdio/io.h> |
| #include <lib/fidl/cpp/binding_set.h> |
| #include <lib/sys/cpp/component_context.h> |
| #include <lib/syslog/cpp/macros.h> |
| |
| #include "src/lib/fxl/command_line.h" |
| #include "src/lib/fxl/log_settings_command_line.h" |
| |
| // This is a fake Vulkan loader service that implements just enough for the libvulkan.so to work. |
| class LoaderImpl final : public fuchsia::vulkan::loader::Loader { |
| public: |
| explicit LoaderImpl() = default; |
| ~LoaderImpl() final = default; |
| |
| // Adds a binding for fuchsia::vulkan::loader::Loader to |outgoing| |
| void Add(const std::shared_ptr<sys::OutgoingDirectory>& outgoing) { |
| outgoing->AddPublicService(fidl::InterfaceRequestHandler<fuchsia::vulkan::loader::Loader>( |
| [this](fidl::InterfaceRequest<fuchsia::vulkan::loader::Loader> request) { |
| bindings_.AddBinding(this, std::move(request), nullptr); |
| })); |
| } |
| |
| private: |
| // fuchsia::vulkan::loader::Loader impl |
| void Get(std::string name, GetCallback callback) override { |
| // libvulkan_fake.so is located inside this package. |
| std::string load_path = "/pkg/lib/" + name; |
| int fd; |
| zx_status_t status = |
| fdio_open_fd(load_path.c_str(), |
| static_cast<uint32_t>(fuchsia::io::OpenFlags::RIGHT_READABLE | |
| fuchsia::io::OpenFlags::RIGHT_EXECUTABLE), |
| &fd); |
| if (status != ZX_OK) { |
| FX_LOGS(ERROR) << "Could not open path " << load_path << ":" << status; |
| callback({}); |
| return; |
| } |
| zx::vmo vmo; |
| status = fdio_get_vmo_exec(fd, vmo.reset_and_get_address()); |
| close(fd); |
| if (status != ZX_OK) { |
| FX_LOGS(ERROR) << "Could not clone vmo exec: " << status; |
| } |
| callback(std::move(vmo)); |
| } |
| |
| void ConnectToDeviceFs(zx::channel channel) override { |
| // The fake libvulkan implementation expects to be able to read |
| // libvulkan_fake.json from the device fs. |
| fdio_open("/pkg/data/manifest", static_cast<uint32_t>(fuchsia::io::OpenFlags::RIGHT_READABLE), |
| channel.release()); |
| } |
| void GetSupportedFeatures(GetSupportedFeaturesCallback callback) override { |
| fuchsia::vulkan::loader::Features features = |
| fuchsia::vulkan::loader::Features::CONNECT_TO_DEVICE_FS | |
| fuchsia::vulkan::loader::Features::GET | |
| fuchsia::vulkan::loader::Features::CONNECT_TO_MANIFEST_FS; |
| |
| callback(features); |
| } |
| |
| void GetVmexResource(GetVmexResourceCallback callback) override { |
| // Can't pass the enum value directly to `WithErr()` because it expects a "non-const &&"" arg. |
| auto err = fuchsia::vulkan::loader::GetVmexResourceError::LAVAPIPE_ICD_NOT_ALLOWED; |
| callback(fuchsia::vulkan::loader::Loader_GetVmexResource_Result::WithErr(std::move(err))); |
| } |
| |
| void ConnectToManifestFs(fuchsia::vulkan::loader::ConnectToManifestOptions options, |
| zx::channel channel) override { |
| fdio_open("/pkg/data/manifest", static_cast<uint32_t>(fuchsia::io::OpenFlags::RIGHT_READABLE), |
| channel.release()); |
| } |
| |
| fidl::BindingSet<fuchsia::vulkan::loader::Loader> bindings_; |
| }; |
| |
| int main(int argc, const char* const* argv) { |
| async::Loop loop(&kAsyncLoopConfigAttachToCurrentThread); |
| auto command_line = fxl::CommandLineFromArgcArgv(argc, argv); |
| fxl::SetLogSettingsFromCommandLine(command_line); |
| auto context = sys::ComponentContext::CreateAndServeOutgoingDirectory(); |
| |
| LoaderImpl loader_impl; |
| loader_impl.Add(context->outgoing()); |
| loop.Run(); |
| return 0; |
| } |