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// 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.
#include "dawn_native/null/DeviceNull.h"
#include "dawn_native/BackendConnection.h"
#include "dawn_native/Commands.h"
#include "dawn_native/ErrorData.h"
#include "dawn_native/Instance.h"
#include "dawn_native/Surface.h"
#include <spirv_cross.hpp>
namespace dawn_native { namespace null {
// Implementation of pre-Device objects: the null adapter, null backend connection and Connect()
Adapter::Adapter(InstanceBase* instance) : AdapterBase(instance, wgpu::BackendType::Null) {
mPCIInfo.name = "Null backend";
mAdapterType = wgpu::AdapterType::CPU;
// Enable all extensions by default for the convenience of tests.
mSupportedExtensions.extensionsBitSet.flip();
}
Adapter::~Adapter() = default;
// Used for the tests that intend to use an adapter without all extensions enabled.
void Adapter::SetSupportedExtensions(const std::vector<const char*>& requiredExtensions) {
mSupportedExtensions = GetInstance()->ExtensionNamesToExtensionsSet(requiredExtensions);
}
ResultOrError<DeviceBase*> Adapter::CreateDeviceImpl(const DeviceDescriptor* descriptor) {
return Device::Create(this, descriptor);
}
class Backend : public BackendConnection {
public:
Backend(InstanceBase* instance) : BackendConnection(instance, wgpu::BackendType::Null) {
}
std::vector<std::unique_ptr<AdapterBase>> DiscoverDefaultAdapters() override {
// There is always a single Null adapter because it is purely CPU based and doesn't
// depend on the system.
std::vector<std::unique_ptr<AdapterBase>> adapters;
adapters.push_back(std::make_unique<Adapter>(GetInstance()));
return adapters;
}
};
BackendConnection* Connect(InstanceBase* instance) {
return new Backend(instance);
}
struct CopyFromStagingToBufferOperation : PendingOperation {
virtual void Execute() {
destination->CopyFromStaging(staging, sourceOffset, destinationOffset, size);
}
StagingBufferBase* staging;
Ref<Buffer> destination;
uint64_t sourceOffset;
uint64_t destinationOffset;
uint64_t size;
};
// Device
// static
ResultOrError<Device*> Device::Create(Adapter* adapter, const DeviceDescriptor* descriptor) {
Ref<Device> device = AcquireRef(new Device(adapter, descriptor));
DAWN_TRY(device->Initialize());
return device.Detach();
}
Device::~Device() {
ShutDownBase();
}
MaybeError Device::Initialize() {
return DeviceBase::Initialize(new Queue(this));
}
ResultOrError<Ref<BindGroupBase>> Device::CreateBindGroupImpl(
const BindGroupDescriptor* descriptor) {
return AcquireRef(new BindGroup(this, descriptor));
}
ResultOrError<Ref<BindGroupLayoutBase>> Device::CreateBindGroupLayoutImpl(
const BindGroupLayoutDescriptor* descriptor) {
return AcquireRef(new BindGroupLayout(this, descriptor));
}
ResultOrError<Ref<BufferBase>> Device::CreateBufferImpl(const BufferDescriptor* descriptor) {
DAWN_TRY(IncrementMemoryUsage(descriptor->size));
return AcquireRef(new Buffer(this, descriptor));
}
ResultOrError<Ref<CommandBufferBase>> Device::CreateCommandBuffer(
CommandEncoder* encoder,
const CommandBufferDescriptor* descriptor) {
return AcquireRef(new CommandBuffer(encoder, descriptor));
}
ResultOrError<Ref<ComputePipelineBase>> Device::CreateComputePipelineImpl(
const ComputePipelineDescriptor* descriptor) {
return AcquireRef(new ComputePipeline(this, descriptor));
}
ResultOrError<Ref<PipelineLayoutBase>> Device::CreatePipelineLayoutImpl(
const PipelineLayoutDescriptor* descriptor) {
return AcquireRef(new PipelineLayout(this, descriptor));
}
ResultOrError<Ref<QuerySetBase>> Device::CreateQuerySetImpl(
const QuerySetDescriptor* descriptor) {
return AcquireRef(new QuerySet(this, descriptor));
}
ResultOrError<Ref<RenderPipelineBase>> Device::CreateRenderPipelineImpl(
const RenderPipelineDescriptor* descriptor) {
return AcquireRef(new RenderPipeline(this, descriptor));
}
ResultOrError<Ref<SamplerBase>> Device::CreateSamplerImpl(const SamplerDescriptor* descriptor) {
return AcquireRef(new Sampler(this, descriptor));
}
ResultOrError<Ref<ShaderModuleBase>> Device::CreateShaderModuleImpl(
const ShaderModuleDescriptor* descriptor,
ShaderModuleParseResult* parseResult) {
Ref<ShaderModule> module = AcquireRef(new ShaderModule(this, descriptor));
DAWN_TRY(module->Initialize(parseResult));
return module;
}
ResultOrError<Ref<SwapChainBase>> Device::CreateSwapChainImpl(
const SwapChainDescriptor* descriptor) {
return AcquireRef(new OldSwapChain(this, descriptor));
}
ResultOrError<Ref<NewSwapChainBase>> Device::CreateSwapChainImpl(
Surface* surface,
NewSwapChainBase* previousSwapChain,
const SwapChainDescriptor* descriptor) {
return SwapChain::Create(this, surface, previousSwapChain, descriptor);
}
ResultOrError<Ref<TextureBase>> Device::CreateTextureImpl(const TextureDescriptor* descriptor) {
return AcquireRef(new Texture(this, descriptor, TextureBase::TextureState::OwnedInternal));
}
ResultOrError<Ref<TextureViewBase>> Device::CreateTextureViewImpl(
TextureBase* texture,
const TextureViewDescriptor* descriptor) {
return AcquireRef(new TextureView(texture, descriptor));
}
ResultOrError<std::unique_ptr<StagingBufferBase>> Device::CreateStagingBuffer(size_t size) {
std::unique_ptr<StagingBufferBase> stagingBuffer =
std::make_unique<StagingBuffer>(size, this);
DAWN_TRY(stagingBuffer->Initialize());
return std::move(stagingBuffer);
}
void Device::ShutDownImpl() {
ASSERT(GetState() == State::Disconnected);
// Clear pending operations before checking mMemoryUsage because some operations keep a
// reference to Buffers.
mPendingOperations.clear();
ASSERT(mMemoryUsage == 0);
}
MaybeError Device::WaitForIdleForDestruction() {
mPendingOperations.clear();
return {};
}
MaybeError Device::CopyFromStagingToBuffer(StagingBufferBase* source,
uint64_t sourceOffset,
BufferBase* destination,
uint64_t destinationOffset,
uint64_t size) {
if (IsToggleEnabled(Toggle::LazyClearResourceOnFirstUse)) {
destination->SetIsDataInitialized();
}
auto operation = std::make_unique<CopyFromStagingToBufferOperation>();
operation->staging = source;
operation->destination = ToBackend(destination);
operation->sourceOffset = sourceOffset;
operation->destinationOffset = destinationOffset;
operation->size = size;
AddPendingOperation(std::move(operation));
return {};
}
MaybeError Device::CopyFromStagingToTexture(const StagingBufferBase* source,
const TextureDataLayout& src,
TextureCopy* dst,
const Extent3D& copySizePixels) {
return {};
}
MaybeError Device::IncrementMemoryUsage(uint64_t bytes) {
static_assert(kMaxMemoryUsage <= std::numeric_limits<size_t>::max(), "");
if (bytes > kMaxMemoryUsage || mMemoryUsage + bytes > kMaxMemoryUsage) {
return DAWN_OUT_OF_MEMORY_ERROR("Out of memory.");
}
mMemoryUsage += bytes;
return {};
}
void Device::DecrementMemoryUsage(uint64_t bytes) {
ASSERT(mMemoryUsage >= bytes);
mMemoryUsage -= bytes;
}
MaybeError Device::TickImpl() {
return SubmitPendingOperations();
}
ResultOrError<ExecutionSerial> Device::CheckAndUpdateCompletedSerials() {
return GetLastSubmittedCommandSerial();
}
void Device::AddPendingOperation(std::unique_ptr<PendingOperation> operation) {
mPendingOperations.emplace_back(std::move(operation));
}
MaybeError Device::SubmitPendingOperations() {
for (auto& operation : mPendingOperations) {
operation->Execute();
}
mPendingOperations.clear();
DAWN_TRY(CheckPassedSerials());
IncrementLastSubmittedCommandSerial();
return {};
}
// BindGroupDataHolder
BindGroupDataHolder::BindGroupDataHolder(size_t size)
: mBindingDataAllocation(malloc(size)) // malloc is guaranteed to return a
// pointer aligned enough for the allocation
{
}
BindGroupDataHolder::~BindGroupDataHolder() {
free(mBindingDataAllocation);
}
// BindGroup
BindGroup::BindGroup(DeviceBase* device, const BindGroupDescriptor* descriptor)
: BindGroupDataHolder(descriptor->layout->GetBindingDataSize()),
BindGroupBase(device, descriptor, mBindingDataAllocation) {
}
// Buffer
Buffer::Buffer(Device* device, const BufferDescriptor* descriptor)
: BufferBase(device, descriptor) {
mBackingData = std::unique_ptr<uint8_t[]>(new uint8_t[GetSize()]);
}
Buffer::~Buffer() {
DestroyInternal();
ToBackend(GetDevice())->DecrementMemoryUsage(GetSize());
}
bool Buffer::IsCPUWritableAtCreation() const {
// Only return true for mappable buffers so we can test cases that need / don't need a
// staging buffer.
return (GetUsage() & (wgpu::BufferUsage::MapRead | wgpu::BufferUsage::MapWrite)) != 0;
}
MaybeError Buffer::MapAtCreationImpl() {
return {};
}
void Buffer::CopyFromStaging(StagingBufferBase* staging,
uint64_t sourceOffset,
uint64_t destinationOffset,
uint64_t size) {
uint8_t* ptr = reinterpret_cast<uint8_t*>(staging->GetMappedPointer());
memcpy(mBackingData.get() + destinationOffset, ptr + sourceOffset, size);
}
void Buffer::DoWriteBuffer(uint64_t bufferOffset, const void* data, size_t size) {
ASSERT(bufferOffset + size <= GetSize());
ASSERT(mBackingData);
memcpy(mBackingData.get() + bufferOffset, data, size);
}
MaybeError Buffer::MapAsyncImpl(wgpu::MapMode mode, size_t offset, size_t size) {
return {};
}
void* Buffer::GetMappedPointerImpl() {
return mBackingData.get();
}
void Buffer::UnmapImpl() {
}
void Buffer::DestroyImpl() {
}
// CommandBuffer
CommandBuffer::CommandBuffer(CommandEncoder* encoder, const CommandBufferDescriptor* descriptor)
: CommandBufferBase(encoder, descriptor) {
}
// QuerySet
QuerySet::QuerySet(Device* device, const QuerySetDescriptor* descriptor)
: QuerySetBase(device, descriptor) {
}
QuerySet::~QuerySet() {
DestroyInternal();
}
void QuerySet::DestroyImpl() {
}
// Queue
Queue::Queue(Device* device) : QueueBase(device) {
}
Queue::~Queue() {
}
MaybeError Queue::SubmitImpl(uint32_t, CommandBufferBase* const*) {
Device* device = ToBackend(GetDevice());
// The Vulkan, D3D12 and Metal implementation all tick the device here,
// for testing purposes we should also tick in the null implementation.
DAWN_TRY(device->Tick());
return device->SubmitPendingOperations();
}
MaybeError Queue::WriteBufferImpl(BufferBase* buffer,
uint64_t bufferOffset,
const void* data,
size_t size) {
ToBackend(buffer)->DoWriteBuffer(bufferOffset, data, size);
return {};
}
// SwapChain
// static
ResultOrError<Ref<SwapChain>> SwapChain::Create(Device* device,
Surface* surface,
NewSwapChainBase* previousSwapChain,
const SwapChainDescriptor* descriptor) {
Ref<SwapChain> swapchain = AcquireRef(new SwapChain(device, surface, descriptor));
DAWN_TRY(swapchain->Initialize(previousSwapChain));
return swapchain;
}
MaybeError SwapChain::Initialize(NewSwapChainBase* previousSwapChain) {
if (previousSwapChain != nullptr) {
// TODO(crbug.com/dawn/269): figure out what should happen when surfaces are used by
// multiple backends one after the other. It probably needs to block until the backend
// and GPU are completely finished with the previous swapchain.
if (previousSwapChain->GetBackendType() != wgpu::BackendType::Null) {
return DAWN_VALIDATION_ERROR("null::SwapChain cannot switch between APIs");
}
}
return {};
}
SwapChain::~SwapChain() = default;
MaybeError SwapChain::PresentImpl() {
mTexture->APIDestroy();
mTexture = nullptr;
return {};
}
ResultOrError<TextureViewBase*> SwapChain::GetCurrentTextureViewImpl() {
TextureDescriptor textureDesc = GetSwapChainBaseTextureDescriptor(this);
// TODO(dawn:723): change to not use AcquireRef for reentrant object creation.
mTexture = AcquireRef(
new Texture(GetDevice(), &textureDesc, TextureBase::TextureState::OwnedInternal));
// TODO(dawn:723): change to not use AcquireRef for reentrant object creation.
return mTexture->APICreateView();
}
void SwapChain::DetachFromSurfaceImpl() {
if (mTexture != nullptr) {
mTexture->APIDestroy();
mTexture = nullptr;
}
}
// ShaderModule
MaybeError ShaderModule::Initialize(ShaderModuleParseResult* parseResult) {
return InitializeBase(parseResult);
}
// OldSwapChain
OldSwapChain::OldSwapChain(Device* device, const SwapChainDescriptor* descriptor)
: OldSwapChainBase(device, descriptor) {
const auto& im = GetImplementation();
im.Init(im.userData, nullptr);
}
OldSwapChain::~OldSwapChain() {
}
TextureBase* OldSwapChain::GetNextTextureImpl(const TextureDescriptor* descriptor) {
return GetDevice()->APICreateTexture(descriptor);
}
MaybeError OldSwapChain::OnBeforePresent(TextureViewBase*) {
return {};
}
// NativeSwapChainImpl
void NativeSwapChainImpl::Init(WSIContext* context) {
}
DawnSwapChainError NativeSwapChainImpl::Configure(WGPUTextureFormat format,
WGPUTextureUsage,
uint32_t width,
uint32_t height) {
return DAWN_SWAP_CHAIN_NO_ERROR;
}
DawnSwapChainError NativeSwapChainImpl::GetNextTexture(DawnSwapChainNextTexture* nextTexture) {
return DAWN_SWAP_CHAIN_NO_ERROR;
}
DawnSwapChainError NativeSwapChainImpl::Present() {
return DAWN_SWAP_CHAIN_NO_ERROR;
}
wgpu::TextureFormat NativeSwapChainImpl::GetPreferredFormat() const {
return wgpu::TextureFormat::RGBA8Unorm;
}
// StagingBuffer
StagingBuffer::StagingBuffer(size_t size, Device* device)
: StagingBufferBase(size), mDevice(device) {
}
StagingBuffer::~StagingBuffer() {
if (mBuffer) {
mDevice->DecrementMemoryUsage(GetSize());
}
}
MaybeError StagingBuffer::Initialize() {
DAWN_TRY(mDevice->IncrementMemoryUsage(GetSize()));
mBuffer = std::make_unique<uint8_t[]>(GetSize());
mMappedPointer = mBuffer.get();
return {};
}
uint32_t Device::GetOptimalBytesPerRowAlignment() const {
return 1;
}
uint64_t Device::GetOptimalBufferToTextureCopyOffsetAlignment() const {
return 1;
}
float Device::GetTimestampPeriodInNS() const {
return 1.0f;
}
}} // namespace dawn_native::null