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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.
#ifndef SRC_DAWN_NATIVE_INSTANCE_H_
#define SRC_DAWN_NATIVE_INSTANCE_H_
#include <array>
#include <memory>
#include <mutex>
#include <set>
#include <string>
#include <unordered_map>
#include <vector>
#include "dawn/common/RefCounted.h"
#include "dawn/common/ityp_bitset.h"
#include "dawn/native/Adapter.h"
#include "dawn/native/BackendConnection.h"
#include "dawn/native/BlobCache.h"
#include "dawn/native/Features.h"
#include "dawn/native/RefCountedWithExternalCount.h"
#include "dawn/native/Toggles.h"
#include "dawn/native/dawn_platform.h"
namespace dawn::platform {
class Platform;
} // namespace dawn::platform
namespace dawn::native {
class CallbackTaskManager;
class DeviceBase;
class Surface;
class XlibXcbFunctions;
using BackendsBitset = ityp::bitset<wgpu::BackendType, kEnumCount<wgpu::BackendType>>;
InstanceBase* APICreateInstance(const InstanceDescriptor* descriptor);
// This is called InstanceBase for consistency across the frontend, even if the backends don't
// specialize this class.
class InstanceBase final : public RefCountedWithExternalCount {
public:
static Ref<InstanceBase> Create(const InstanceDescriptor* descriptor = nullptr);
void APIRequestAdapter(const RequestAdapterOptions* options,
WGPURequestAdapterCallback callback,
void* userdata);
void DiscoverDefaultAdapters();
bool DiscoverAdapters(const AdapterDiscoveryOptionsBase* options);
const std::vector<Ref<AdapterBase>>& GetAdapters() const;
// Used to handle error that happen up to device creation.
bool ConsumedError(MaybeError maybeError);
template <typename T>
bool ConsumedError(ResultOrError<T> resultOrError, T* result) {
if (resultOrError.IsError()) {
ConsumeError(resultOrError.AcquireError());
return true;
}
*result = resultOrError.AcquireSuccess();
return false;
}
const TogglesState& GetTogglesState() const;
// Used to query the details of a toggle. Return nullptr if toggleName is not a valid name
// of a toggle supported in Dawn.
const ToggleInfo* GetToggleInfo(const char* toggleName);
Toggle ToggleNameToEnum(const char* toggleName);
// Used to query the details of an feature. Return nullptr if featureName is not a valid
// name of an feature supported in Dawn.
const FeatureInfo* GetFeatureInfo(wgpu::FeatureName feature);
bool IsBackendValidationEnabled() const;
void SetBackendValidationLevel(BackendValidationLevel level);
BackendValidationLevel GetBackendValidationLevel() const;
void EnableBeginCaptureOnStartup(bool beginCaptureOnStartup);
bool IsBeginCaptureOnStartupEnabled() const;
// TODO(crbug.com/dawn/1495): Move this to a Toggle, perhaps on RequestAdapterOptions
// after Toggle refactor is complete.
void EnableAdapterBlocklist(bool enable);
bool IsAdapterBlocklistEnabled() const;
// TODO(dawn:1374): SetPlatform should become a private helper, and SetPlatformForTesting
// will become the NOT thread-safe testing version exposed for special testing cases.
void SetPlatform(dawn::platform::Platform* platform);
void SetPlatformForTesting(dawn::platform::Platform* platform);
dawn::platform::Platform* GetPlatform();
BlobCache* GetBlobCache(bool enabled = true);
uint64_t GetDeviceCountForTesting() const;
void AddDevice(DeviceBase* device);
void RemoveDevice(DeviceBase* device);
const std::vector<std::string>& GetRuntimeSearchPaths() const;
const Ref<CallbackTaskManager>& GetCallbackTaskManager() const;
// Get backend-independent libraries that need to be loaded dynamically.
const XlibXcbFunctions* GetOrCreateXlibXcbFunctions();
// Dawn API
Surface* APICreateSurface(const SurfaceDescriptor* descriptor);
bool APIProcessEvents();
private:
explicit InstanceBase(const TogglesState& instanceToggles);
~InstanceBase() override;
void WillDropLastExternalRef() override;
InstanceBase(const InstanceBase& other) = delete;
InstanceBase& operator=(const InstanceBase& other) = delete;
MaybeError Initialize(const InstanceDescriptor* descriptor);
// Lazily creates connections to all backends that have been compiled.
void EnsureBackendConnection(wgpu::BackendType backendType);
MaybeError DiscoverAdaptersInternal(const AdapterDiscoveryOptionsBase* options);
ResultOrError<Ref<AdapterBase>> RequestAdapterInternal(const RequestAdapterOptions* options);
void ConsumeError(std::unique_ptr<ErrorData> error);
std::vector<std::string> mRuntimeSearchPaths;
BackendsBitset mBackendsConnected;
bool mDiscoveredDefaultAdapters = false;
bool mBeginCaptureOnStartup = false;
bool mEnableAdapterBlocklist = false;
BackendValidationLevel mBackendValidationLevel = BackendValidationLevel::Disabled;
dawn::platform::Platform* mPlatform = nullptr;
std::unique_ptr<dawn::platform::Platform> mDefaultPlatform;
std::unique_ptr<BlobCache> mBlobCache;
BlobCache mPassthroughBlobCache;
std::vector<std::unique_ptr<BackendConnection>> mBackends;
std::vector<Ref<AdapterBase>> mAdapters;
TogglesState mToggles;
FeaturesInfo mFeaturesInfo;
TogglesInfo mTogglesInfo;
#if defined(DAWN_USE_X11)
std::unique_ptr<XlibXcbFunctions> mXlibXcbFunctions;
#endif // defined(DAWN_USE_X11)
Ref<CallbackTaskManager> mCallbackTaskManager;
std::set<DeviceBase*> mDevicesList;
mutable std::mutex mDevicesListMutex;
};
} // namespace dawn::native
#endif // SRC_DAWN_NATIVE_INSTANCE_H_