src/dawn_native/null/DeviceNull.h - dawn - Git at Google

 // Copyright 2017 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 DAWNNATIVE_NULL_DEVICENULL_H_
 #define DAWNNATIVE_NULL_DEVICENULL_H_

 #include "dawn_native/Adapter.h"
 #include "dawn_native/BindGroup.h"
 #include "dawn_native/BindGroupLayout.h"
 #include "dawn_native/Buffer.h"
 #include "dawn_native/CommandBuffer.h"
 #include "dawn_native/CommandEncoder.h"
 #include "dawn_native/ComputePipeline.h"
 #include "dawn_native/Device.h"
 #include "dawn_native/PipelineLayout.h"
 #include "dawn_native/QuerySet.h"
 #include "dawn_native/Queue.h"
 #include "dawn_native/RenderPipeline.h"
 #include "dawn_native/RingBufferAllocator.h"
 #include "dawn_native/Sampler.h"
 #include "dawn_native/ShaderModule.h"
 #include "dawn_native/StagingBuffer.h"
 #include "dawn_native/SwapChain.h"
 #include "dawn_native/Texture.h"
 #include "dawn_native/ToBackend.h"
 #include "dawn_native/dawn_platform.h"

 namespace dawn_native { namespace null {

     class Adapter;
     class BindGroup;
     using BindGroupLayout = BindGroupLayoutBase;
     class Buffer;
     class CommandBuffer;
     using ComputePipeline = ComputePipelineBase;
     class Device;
     using PipelineLayout = PipelineLayoutBase;
     class QuerySet;
     class Queue;
     using RenderPipeline = RenderPipelineBase;
     using Sampler = SamplerBase;
     using ShaderModule = ShaderModuleBase;
     class SwapChain;
     using Texture = TextureBase;
     using TextureView = TextureViewBase;

     struct NullBackendTraits {
         using AdapterType = Adapter;
         using BindGroupType = BindGroup;
         using BindGroupLayoutType = BindGroupLayout;
         using BufferType = Buffer;
         using CommandBufferType = CommandBuffer;
         using ComputePipelineType = ComputePipeline;
         using DeviceType = Device;
         using PipelineLayoutType = PipelineLayout;
         using QuerySetType = QuerySet;
         using QueueType = Queue;
         using RenderPipelineType = RenderPipeline;
         using SamplerType = Sampler;
         using ShaderModuleType = ShaderModule;
         using SwapChainType = SwapChain;
         using TextureType = Texture;
         using TextureViewType = TextureView;
     };

     template <typename T>
     auto ToBackend(T&& common) -> decltype(ToBackendBase<NullBackendTraits>(common)) {
         return ToBackendBase<NullBackendTraits>(common);
     }

     struct PendingOperation {
         virtual ~PendingOperation() = default;
         virtual void Execute() = 0;
     };

     class Device : public DeviceBase {
       public:
         static ResultOrError<Device*> Create(Adapter* adapter, const DeviceDescriptor* descriptor);
         ~Device() override;

         MaybeError Initialize();

         CommandBufferBase* CreateCommandBuffer(CommandEncoder* encoder,
                                                const CommandBufferDescriptor* descriptor) override;

         MaybeError TickImpl() override;

         void AddPendingOperation(std::unique_ptr<PendingOperation> operation);
         void SubmitPendingOperations();

         ResultOrError<std::unique_ptr<StagingBufferBase>> CreateStagingBuffer(size_t size) override;
         MaybeError CopyFromStagingToBuffer(StagingBufferBase* source,
                                            uint64_t sourceOffset,
                                            BufferBase* destination,
                                            uint64_t destinationOffset,
                                            uint64_t size) override;

         MaybeError IncrementMemoryUsage(size_t bytes);
         void DecrementMemoryUsage(size_t bytes);

       private:
         using DeviceBase::DeviceBase;

         ResultOrError<BindGroupBase*> CreateBindGroupImpl(
             const BindGroupDescriptor* descriptor) override;
         ResultOrError<BindGroupLayoutBase*> CreateBindGroupLayoutImpl(
             const BindGroupLayoutDescriptor* descriptor) override;
         ResultOrError<BufferBase*> CreateBufferImpl(const BufferDescriptor* descriptor) override;
         ResultOrError<ComputePipelineBase*> CreateComputePipelineImpl(
             const ComputePipelineDescriptor* descriptor) override;
         ResultOrError<PipelineLayoutBase*> CreatePipelineLayoutImpl(
             const PipelineLayoutDescriptor* descriptor) override;
         ResultOrError<QuerySetBase*> CreateQuerySetImpl(
             const QuerySetDescriptor* descriptor) override;
         ResultOrError<RenderPipelineBase*> CreateRenderPipelineImpl(
             const RenderPipelineDescriptor* descriptor) override;
         ResultOrError<SamplerBase*> CreateSamplerImpl(const SamplerDescriptor* descriptor) override;
         ResultOrError<ShaderModuleBase*> CreateShaderModuleImpl(
             const ShaderModuleDescriptor* descriptor) override;
         ResultOrError<SwapChainBase*> CreateSwapChainImpl(
             const SwapChainDescriptor* descriptor) override;
         ResultOrError<NewSwapChainBase*> CreateSwapChainImpl(
             Surface* surface,
             NewSwapChainBase* previousSwapChain,
             const SwapChainDescriptor* descriptor) override;
         ResultOrError<Ref<TextureBase>> CreateTextureImpl(
             const TextureDescriptor* descriptor) override;
         ResultOrError<TextureViewBase*> CreateTextureViewImpl(
             TextureBase* texture,
             const TextureViewDescriptor* descriptor) override;

         Serial CheckAndUpdateCompletedSerials() override;

         void ShutDownImpl() override;
         MaybeError WaitForIdleForDestruction() override;

         std::vector<std::unique_ptr<PendingOperation>> mPendingOperations;

         static constexpr size_t kMaxMemoryUsage = 256 * 1024 * 1024;
         size_t mMemoryUsage = 0;
     };

     class Adapter : public AdapterBase {
       public:
         Adapter(InstanceBase* instance);
         ~Adapter() override;

         // Used for the tests that intend to use an adapter without all extensions enabled.
         void SetSupportedExtensions(const std::vector<const char*>& requiredExtensions);

       private:
         ResultOrError<DeviceBase*> CreateDeviceImpl(const DeviceDescriptor* descriptor) override;
     };

     // Helper class so |BindGroup| can allocate memory for its binding data,
     // before calling the BindGroupBase base class constructor.
     class BindGroupDataHolder {
       protected:
         explicit BindGroupDataHolder(size_t size);
         ~BindGroupDataHolder();

         void* mBindingDataAllocation;
     };

     // We don't have the complexity of placement-allocation of bind group data in
     // the Null backend. This class, keeps the binding data in a separate allocation for simplicity.
     class BindGroup final : private BindGroupDataHolder, public BindGroupBase {
       public:
         BindGroup(DeviceBase* device, const BindGroupDescriptor* descriptor);

       private:
         ~BindGroup() override = default;
     };

     class Buffer final : public BufferBase {
       public:
         Buffer(Device* device, const BufferDescriptor* descriptor);

         void CopyFromStaging(StagingBufferBase* staging,
                              uint64_t sourceOffset,
                              uint64_t destinationOffset,
                              uint64_t size);

         void DoWriteBuffer(uint64_t bufferOffset, const void* data, size_t size);

       private:
         ~Buffer() override;

         // Dawn API
         MaybeError MapReadAsyncImpl(uint32_t serial) override;
         MaybeError MapWriteAsyncImpl(uint32_t serial) override;
         void UnmapImpl() override;
         void DestroyImpl() override;

         bool IsMapWritable() const override;
         MaybeError MapAtCreationImpl(uint8_t** mappedPointer) override;
         void MapAsyncImplCommon(uint32_t serial, bool isWrite);
         void* GetMappedPointerImpl() override;

         std::unique_ptr<uint8_t[]> mBackingData;
     };

     class CommandBuffer final : public CommandBufferBase {
       public:
         CommandBuffer(CommandEncoder* encoder, const CommandBufferDescriptor* descriptor);

       private:
         ~CommandBuffer() override;

         CommandIterator mCommands;
     };

     class QuerySet final : public QuerySetBase {
       public:
         QuerySet(Device* device, const QuerySetDescriptor* descriptor);

       private:
         ~QuerySet() override;

         void DestroyImpl() override;
     };

     class Queue final : public QueueBase {
       public:
         Queue(Device* device);

       private:
         ~Queue() override;
         MaybeError SubmitImpl(uint32_t commandCount, CommandBufferBase* const* commands) override;
         MaybeError WriteBufferImpl(BufferBase* buffer,
                                    uint64_t bufferOffset,
                                    const void* data,
                                    size_t size) override;
     };

     class SwapChain final : public NewSwapChainBase {
       public:
         SwapChain(Device* device,
                   Surface* surface,
                   NewSwapChainBase* previousSwapChain,
                   const SwapChainDescriptor* descriptor);

       private:
         ~SwapChain() override;

         Ref<Texture> mTexture;

         MaybeError PresentImpl() override;
         ResultOrError<TextureViewBase*> GetCurrentTextureViewImpl() override;
         void DetachFromSurfaceImpl() override;
     };

     class OldSwapChain final : public OldSwapChainBase {
       public:
         OldSwapChain(Device* device, const SwapChainDescriptor* descriptor);

       protected:
         ~OldSwapChain() override;
         TextureBase* GetNextTextureImpl(const TextureDescriptor* descriptor) override;
         MaybeError OnBeforePresent(TextureViewBase*) override;
     };

     class NativeSwapChainImpl {
       public:
         using WSIContext = struct {};
         void Init(WSIContext* context);
         DawnSwapChainError Configure(WGPUTextureFormat format,
                                      WGPUTextureUsage,
                                      uint32_t width,
                                      uint32_t height);
         DawnSwapChainError GetNextTexture(DawnSwapChainNextTexture* nextTexture);
         DawnSwapChainError Present();
         wgpu::TextureFormat GetPreferredFormat() const;
     };

     class StagingBuffer : public StagingBufferBase {
       public:
         StagingBuffer(size_t size, Device* device);
         ~StagingBuffer() override;
         MaybeError Initialize() override;

       private:
         Device* mDevice;
         std::unique_ptr<uint8_t[]> mBuffer;
     };

 }}  // namespace dawn_native::null

 #endif  // DAWNNATIVE_NULL_DEVICENULL_H_
	// Copyright 2017 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 DAWNNATIVE_NULL_DEVICENULL_H_
	#define DAWNNATIVE_NULL_DEVICENULL_H_

	#include "dawn_native/Adapter.h"
	#include "dawn_native/BindGroup.h"
	#include "dawn_native/BindGroupLayout.h"
	#include "dawn_native/Buffer.h"
	#include "dawn_native/CommandBuffer.h"
	#include "dawn_native/CommandEncoder.h"
	#include "dawn_native/ComputePipeline.h"
	#include "dawn_native/Device.h"
	#include "dawn_native/PipelineLayout.h"
	#include "dawn_native/QuerySet.h"
	#include "dawn_native/Queue.h"
	#include "dawn_native/RenderPipeline.h"
	#include "dawn_native/RingBufferAllocator.h"
	#include "dawn_native/Sampler.h"
	#include "dawn_native/ShaderModule.h"
	#include "dawn_native/StagingBuffer.h"
	#include "dawn_native/SwapChain.h"
	#include "dawn_native/Texture.h"
	#include "dawn_native/ToBackend.h"
	#include "dawn_native/dawn_platform.h"

	namespace dawn_native { namespace null {

	class Adapter;
	class BindGroup;
	using BindGroupLayout = BindGroupLayoutBase;
	class Buffer;
	class CommandBuffer;
	using ComputePipeline = ComputePipelineBase;
	class Device;
	using PipelineLayout = PipelineLayoutBase;
	class QuerySet;
	class Queue;
	using RenderPipeline = RenderPipelineBase;
	using Sampler = SamplerBase;
	using ShaderModule = ShaderModuleBase;
	class SwapChain;
	using Texture = TextureBase;
	using TextureView = TextureViewBase;

	struct NullBackendTraits {
	using AdapterType = Adapter;
	using BindGroupType = BindGroup;
	using BindGroupLayoutType = BindGroupLayout;
	using BufferType = Buffer;
	using CommandBufferType = CommandBuffer;
	using ComputePipelineType = ComputePipeline;
	using DeviceType = Device;
	using PipelineLayoutType = PipelineLayout;
	using QuerySetType = QuerySet;
	using QueueType = Queue;
	using RenderPipelineType = RenderPipeline;
	using SamplerType = Sampler;
	using ShaderModuleType = ShaderModule;
	using SwapChainType = SwapChain;
	using TextureType = Texture;
	using TextureViewType = TextureView;
	};

	template <typename T>
	auto ToBackend(T&& common) -> decltype(ToBackendBase<NullBackendTraits>(common)) {
	return ToBackendBase<NullBackendTraits>(common);
	}

	struct PendingOperation {
	virtual ~PendingOperation() = default;
	virtual void Execute() = 0;
	};

	class Device : public DeviceBase {
	public:
	static ResultOrError<Device> Create(Adapter adapter, const DeviceDescriptor* descriptor);
	~Device() override;

	MaybeError Initialize();

	CommandBufferBase* CreateCommandBuffer(CommandEncoder* encoder,
	const CommandBufferDescriptor* descriptor) override;

	MaybeError TickImpl() override;

	void AddPendingOperation(std::unique_ptr<PendingOperation> operation);
	void SubmitPendingOperations();

	ResultOrError<std::unique_ptr<StagingBufferBase>> CreateStagingBuffer(size_t size) override;
	MaybeError CopyFromStagingToBuffer(StagingBufferBase* source,
	uint64_t sourceOffset,
	BufferBase* destination,
	uint64_t destinationOffset,
	uint64_t size) override;

	MaybeError IncrementMemoryUsage(size_t bytes);
	void DecrementMemoryUsage(size_t bytes);

	private:
	using DeviceBase::DeviceBase;

	ResultOrError<BindGroupBase*> CreateBindGroupImpl(
	const BindGroupDescriptor* descriptor) override;
	ResultOrError<BindGroupLayoutBase*> CreateBindGroupLayoutImpl(
	const BindGroupLayoutDescriptor* descriptor) override;
	ResultOrError<BufferBase> CreateBufferImpl(const BufferDescriptor descriptor) override;
	ResultOrError<ComputePipelineBase*> CreateComputePipelineImpl(
	const ComputePipelineDescriptor* descriptor) override;
	ResultOrError<PipelineLayoutBase*> CreatePipelineLayoutImpl(
	const PipelineLayoutDescriptor* descriptor) override;
	ResultOrError<QuerySetBase*> CreateQuerySetImpl(
	const QuerySetDescriptor* descriptor) override;
	ResultOrError<RenderPipelineBase*> CreateRenderPipelineImpl(
	const RenderPipelineDescriptor* descriptor) override;
	ResultOrError<SamplerBase> CreateSamplerImpl(const SamplerDescriptor descriptor) override;
	ResultOrError<ShaderModuleBase*> CreateShaderModuleImpl(
	const ShaderModuleDescriptor* descriptor) override;
	ResultOrError<SwapChainBase*> CreateSwapChainImpl(
	const SwapChainDescriptor* descriptor) override;
	ResultOrError<NewSwapChainBase*> CreateSwapChainImpl(
	Surface* surface,
	NewSwapChainBase* previousSwapChain,
	const SwapChainDescriptor* descriptor) override;
	ResultOrError<Ref<TextureBase>> CreateTextureImpl(
	const TextureDescriptor* descriptor) override;
	ResultOrError<TextureViewBase*> CreateTextureViewImpl(
	TextureBase* texture,
	const TextureViewDescriptor* descriptor) override;

	Serial CheckAndUpdateCompletedSerials() override;

	void ShutDownImpl() override;
	MaybeError WaitForIdleForDestruction() override;

	std::vector<std::unique_ptr<PendingOperation>> mPendingOperations;

	static constexpr size_t kMaxMemoryUsage = 256 * 1024 * 1024;
	size_t mMemoryUsage = 0;
	};

	class Adapter : public AdapterBase {
	public:
	Adapter(InstanceBase* instance);
	~Adapter() override;

	// Used for the tests that intend to use an adapter without all extensions enabled.
	void SetSupportedExtensions(const std::vector<const char*>& requiredExtensions);

	private:
	ResultOrError<DeviceBase> CreateDeviceImpl(const DeviceDescriptor descriptor) override;
	};

	// Helper class so \|BindGroup\| can allocate memory for its binding data,
	// before calling the BindGroupBase base class constructor.
	class BindGroupDataHolder {
	protected:
	explicit BindGroupDataHolder(size_t size);
	~BindGroupDataHolder();

	void* mBindingDataAllocation;
	};

	// We don't have the complexity of placement-allocation of bind group data in
	// the Null backend. This class, keeps the binding data in a separate allocation for simplicity.
	class BindGroup final : private BindGroupDataHolder, public BindGroupBase {
	public:
	BindGroup(DeviceBase* device, const BindGroupDescriptor* descriptor);

	private:
	~BindGroup() override = default;
	};

	class Buffer final : public BufferBase {
	public:
	Buffer(Device* device, const BufferDescriptor* descriptor);

	void CopyFromStaging(StagingBufferBase* staging,
	uint64_t sourceOffset,
	uint64_t destinationOffset,
	uint64_t size);

	void DoWriteBuffer(uint64_t bufferOffset, const void* data, size_t size);

	private:
	~Buffer() override;

	// Dawn API
	MaybeError MapReadAsyncImpl(uint32_t serial) override;
	MaybeError MapWriteAsyncImpl(uint32_t serial) override;
	void UnmapImpl() override;
	void DestroyImpl() override;

	bool IsMapWritable() const override;
	MaybeError MapAtCreationImpl(uint8_t** mappedPointer) override;
	void MapAsyncImplCommon(uint32_t serial, bool isWrite);
	void* GetMappedPointerImpl() override;

	std::unique_ptr<uint8_t[]> mBackingData;
	};

	class CommandBuffer final : public CommandBufferBase {
	public:
	CommandBuffer(CommandEncoder* encoder, const CommandBufferDescriptor* descriptor);

	private:
	~CommandBuffer() override;

	CommandIterator mCommands;
	};

	class QuerySet final : public QuerySetBase {
	public:
	QuerySet(Device* device, const QuerySetDescriptor* descriptor);

	private:
	~QuerySet() override;

	void DestroyImpl() override;
	};

	class Queue final : public QueueBase {
	public:
	Queue(Device* device);

	private:
	~Queue() override;
	MaybeError SubmitImpl(uint32_t commandCount, CommandBufferBase* const* commands) override;
	MaybeError WriteBufferImpl(BufferBase* buffer,
	uint64_t bufferOffset,
	const void* data,
	size_t size) override;
	};

	class SwapChain final : public NewSwapChainBase {
	public:
	SwapChain(Device* device,
	Surface* surface,
	NewSwapChainBase* previousSwapChain,
	const SwapChainDescriptor* descriptor);

	private:
	~SwapChain() override;

	Ref<Texture> mTexture;

	MaybeError PresentImpl() override;
	ResultOrError<TextureViewBase*> GetCurrentTextureViewImpl() override;
	void DetachFromSurfaceImpl() override;
	};

	class OldSwapChain final : public OldSwapChainBase {
	public:
	OldSwapChain(Device* device, const SwapChainDescriptor* descriptor);

	protected:
	~OldSwapChain() override;
	TextureBase* GetNextTextureImpl(const TextureDescriptor* descriptor) override;
	MaybeError OnBeforePresent(TextureViewBase*) override;
	};

	class NativeSwapChainImpl {
	public:
	using WSIContext = struct {};
	void Init(WSIContext* context);
	DawnSwapChainError Configure(WGPUTextureFormat format,
	WGPUTextureUsage,
	uint32_t width,
	uint32_t height);
	DawnSwapChainError GetNextTexture(DawnSwapChainNextTexture* nextTexture);
	DawnSwapChainError Present();
	wgpu::TextureFormat GetPreferredFormat() const;
	};

	class StagingBuffer : public StagingBufferBase {
	public:
	StagingBuffer(size_t size, Device* device);
	~StagingBuffer() override;
	MaybeError Initialize() override;

	private:
	Device* mDevice;
	std::unique_ptr<uint8_t[]> mBuffer;
	};

	}} // namespace dawn_native::null

	#endif // DAWNNATIVE_NULL_DEVICENULL_H_