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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 "dawn_native/ErrorData.h"
#include <iostream>
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);
}
#endif // defined(DAWN_ENABLE_BACKEND_OPENGL)
#if defined(DAWN_ENABLE_BACKEND_VULKAN)
namespace vulkan {
BackendConnection* Connect(InstanceBase* instance);
}
#endif // defined(DAWN_ENABLE_BACKEND_VULKAN)
// InstanceBase
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 std::vector<std::unique_ptr<AdapterBase>>& InstanceBase::GetAdapters() const {
return mAdapters;
}
void InstanceBase::EnsureBackendConnections() {
if (mBackendsConnected) {
return;
}
auto Register = [this](BackendConnection* connection, 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), BackendType::D3D12);
#endif // defined(DAWN_ENABLE_BACKEND_D3D12)
#if defined(DAWN_ENABLE_BACKEND_METAL)
Register(metal::Connect(this), BackendType::Metal);
#endif // defined(DAWN_ENABLE_BACKEND_METAL)
#if defined(DAWN_ENABLE_BACKEND_VULKAN)
Register(vulkan::Connect(this), BackendType::Vulkan);
#endif // defined(DAWN_ENABLE_BACKEND_VULKAN)
#if defined(DAWN_ENABLE_BACKEND_OPENGL)
Register(opengl::Connect(this), BackendType::OpenGL);
#endif // defined(DAWN_ENABLE_BACKEND_OPENGL)
#if defined(DAWN_ENABLE_BACKEND_NULL)
Register(null::Connect(this), BackendType::Null);
#endif // defined(DAWN_ENABLE_BACKEND_NULL)
mBackendsConnected = true;
}
ResultOrError<BackendConnection*> InstanceBase::FindBackend(BackendType type) {
for (std::unique_ptr<BackendConnection>& backend : mBackends) {
if (backend->GetType() == type) {
return backend.get();
}
}
return DAWN_VALIDATION_ERROR("Backend isn't present.");
}
MaybeError InstanceBase::DiscoverAdaptersInternal(const AdapterDiscoveryOptionsBase* options) {
EnsureBackendConnections();
BackendConnection* backend;
DAWN_TRY_ASSIGN(backend, FindBackend(options->backendType));
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));
}
return {};
}
bool InstanceBase::ConsumedError(MaybeError maybeError) {
if (maybeError.IsError()) {
ErrorData* error = maybeError.AcquireError();
ASSERT(error != nullptr);
std::cout << error->GetMessage() << std::endl;
delete error;
return true;
}
return false;
}
} // namespace dawn_native