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// Copyright 2018 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 "dawn_native/Instance.h"
#include "common/Assert.h"
#include "common/Log.h"
#include "dawn_native/ErrorData.h"
#include "dawn_native/Surface.h"
#if defined(DAWN_USE_X11)
# include "dawn_native/XlibXcbFunctions.h"
#endif // defined(DAWN_USE_X11)
namespace dawn_native {
// Forward definitions of each backend's "Connect" function that creates new BackendConnection.
// Conditionally compiled declarations are used to avoid using static constructors instead.
#if defined(DAWN_ENABLE_BACKEND_D3D12)
namespace d3d12 {
BackendConnection* Connect(InstanceBase* instance);
}
#endif // defined(DAWN_ENABLE_BACKEND_D3D12)
#if defined(DAWN_ENABLE_BACKEND_METAL)
namespace metal {
BackendConnection* Connect(InstanceBase* instance);
}
#endif // defined(DAWN_ENABLE_BACKEND_METAL)
#if defined(DAWN_ENABLE_BACKEND_NULL)
namespace null {
BackendConnection* Connect(InstanceBase* instance);
}
#endif // defined(DAWN_ENABLE_BACKEND_NULL)
#if defined(DAWN_ENABLE_BACKEND_OPENGL)
namespace opengl {
BackendConnection* Connect(InstanceBase* instance, wgpu::BackendType backendType);
}
#endif // defined(DAWN_ENABLE_BACKEND_OPENGL)
#if defined(DAWN_ENABLE_BACKEND_VULKAN)
namespace vulkan {
BackendConnection* Connect(InstanceBase* instance, bool useSwiftshader);
}
#endif // defined(DAWN_ENABLE_BACKEND_VULKAN)
// InstanceBase
// static
InstanceBase* InstanceBase::Create(const InstanceDescriptor* descriptor) {
Ref<InstanceBase> instance = AcquireRef(new InstanceBase);
if (!instance->Initialize(descriptor)) {
return nullptr;
}
return instance.Detach();
}
bool InstanceBase::Initialize(const InstanceDescriptor*) {
return true;
}
void InstanceBase::DiscoverDefaultAdapters() {
EnsureBackendConnections();
if (mDiscoveredDefaultAdapters) {
return;
}
// Query and merge all default adapters for all backends
for (std::unique_ptr<BackendConnection>& backend : mBackends) {
std::vector<std::unique_ptr<AdapterBase>> backendAdapters =
backend->DiscoverDefaultAdapters();
for (std::unique_ptr<AdapterBase>& adapter : backendAdapters) {
ASSERT(adapter->GetBackendType() == backend->GetType());
ASSERT(adapter->GetInstance() == this);
mAdapters.push_back(std::move(adapter));
}
}
mDiscoveredDefaultAdapters = true;
}
// This is just a wrapper around the real logic that uses Error.h error handling.
bool InstanceBase::DiscoverAdapters(const AdapterDiscoveryOptionsBase* options) {
return !ConsumedError(DiscoverAdaptersInternal(options));
}
const ToggleInfo* InstanceBase::GetToggleInfo(const char* toggleName) {
return mTogglesInfo.GetToggleInfo(toggleName);
}
Toggle InstanceBase::ToggleNameToEnum(const char* toggleName) {
return mTogglesInfo.ToggleNameToEnum(toggleName);
}
const ExtensionInfo* InstanceBase::GetExtensionInfo(const char* extensionName) {
return mExtensionsInfo.GetExtensionInfo(extensionName);
}
Extension InstanceBase::ExtensionNameToEnum(const char* extensionName) {
return mExtensionsInfo.ExtensionNameToEnum(extensionName);
}
ExtensionsSet InstanceBase::ExtensionNamesToExtensionsSet(
const std::vector<const char*>& requiredExtensions) {
return mExtensionsInfo.ExtensionNamesToExtensionsSet(requiredExtensions);
}
const std::vector<std::unique_ptr<AdapterBase>>& InstanceBase::GetAdapters() const {
return mAdapters;
}
void InstanceBase::EnsureBackendConnections() {
if (mBackendsConnected) {
return;
}
auto Register = [this](BackendConnection* connection, wgpu::BackendType expectedType) {
if (connection != nullptr) {
ASSERT(connection->GetType() == expectedType);
ASSERT(connection->GetInstance() == this);
mBackends.push_back(std::unique_ptr<BackendConnection>(connection));
}
};
#if defined(DAWN_ENABLE_BACKEND_D3D12)
Register(d3d12::Connect(this), wgpu::BackendType::D3D12);
#endif // defined(DAWN_ENABLE_BACKEND_D3D12)
#if defined(DAWN_ENABLE_BACKEND_METAL)
Register(metal::Connect(this), wgpu::BackendType::Metal);
#endif // defined(DAWN_ENABLE_BACKEND_METAL)
#if defined(DAWN_ENABLE_BACKEND_VULKAN)
// TODO(https://github.com/KhronosGroup/Vulkan-Loader/issues/287):
// When we can load SwiftShader in parallel with the system driver, we should create the
// backend only once and expose SwiftShader as an additional adapter. For now, we create two
// VkInstances, one from SwiftShader, and one from the system. Note: If the Vulkan driver
// *is* SwiftShader, then this would load SwiftShader twice.
Register(vulkan::Connect(this, false), wgpu::BackendType::Vulkan);
# if defined(DAWN_ENABLE_SWIFTSHADER)
Register(vulkan::Connect(this, true), wgpu::BackendType::Vulkan);
# endif // defined(DAWN_ENABLE_SWIFTSHADER)
#endif // defined(DAWN_ENABLE_BACKEND_VULKAN)
#if defined(DAWN_ENABLE_BACKEND_OPENGL)
Register(opengl::Connect(this, wgpu::BackendType::OpenGL), wgpu::BackendType::OpenGL);
Register(opengl::Connect(this, wgpu::BackendType::OpenGLES), wgpu::BackendType::OpenGLES);
#endif // defined(DAWN_ENABLE_BACKEND_OPENGL)
#if defined(DAWN_ENABLE_BACKEND_NULL)
Register(null::Connect(this), wgpu::BackendType::Null);
#endif // defined(DAWN_ENABLE_BACKEND_NULL)
mBackendsConnected = true;
}
MaybeError InstanceBase::DiscoverAdaptersInternal(const AdapterDiscoveryOptionsBase* options) {
EnsureBackendConnections();
bool foundBackend = false;
for (std::unique_ptr<BackendConnection>& backend : mBackends) {
if (backend->GetType() != static_cast<wgpu::BackendType>(options->backendType)) {
continue;
}
foundBackend = true;
std::vector<std::unique_ptr<AdapterBase>> newAdapters;
DAWN_TRY_ASSIGN(newAdapters, backend->DiscoverAdapters(options));
for (std::unique_ptr<AdapterBase>& adapter : newAdapters) {
ASSERT(adapter->GetBackendType() == backend->GetType());
ASSERT(adapter->GetInstance() == this);
mAdapters.push_back(std::move(adapter));
}
}
if (!foundBackend) {
return DAWN_VALIDATION_ERROR("Backend isn't present.");
}
return {};
}
bool InstanceBase::ConsumedError(MaybeError maybeError) {
if (maybeError.IsError()) {
std::unique_ptr<ErrorData> error = maybeError.AcquireError();
ASSERT(error != nullptr);
dawn::InfoLog() << error->GetMessage();
return true;
}
return false;
}
bool InstanceBase::IsBackendValidationEnabled() const {
return mBackendValidationLevel != BackendValidationLevel::Disabled;
}
void InstanceBase::SetBackendValidationLevel(BackendValidationLevel level) {
mBackendValidationLevel = level;
}
BackendValidationLevel InstanceBase::GetBackendValidationLevel() const {
return mBackendValidationLevel;
}
void InstanceBase::EnableBeginCaptureOnStartup(bool beginCaptureOnStartup) {
mBeginCaptureOnStartup = beginCaptureOnStartup;
}
bool InstanceBase::IsBeginCaptureOnStartupEnabled() const {
return mBeginCaptureOnStartup;
}
void InstanceBase::SetPlatform(dawn_platform::Platform* platform) {
mPlatform = platform;
}
dawn_platform::Platform* InstanceBase::GetPlatform() const {
return mPlatform;
}
const XlibXcbFunctions* InstanceBase::GetOrCreateXlibXcbFunctions() {
#if defined(DAWN_USE_X11)
if (mXlibXcbFunctions == nullptr) {
mXlibXcbFunctions = std::make_unique<XlibXcbFunctions>();
}
return mXlibXcbFunctions.get();
#else
UNREACHABLE();
#endif // defined(DAWN_USE_X11)
}
Surface* InstanceBase::APICreateSurface(const SurfaceDescriptor* descriptor) {
if (ConsumedError(ValidateSurfaceDescriptor(this, descriptor))) {
return nullptr;
}
return new Surface(this, descriptor);
}
} // namespace dawn_native