void FTesselatedScreenRectangleIndexBuffer::InitRHI()
{
TResourceArray<uint16, INDEXBUFFER_ALIGNMENT> IndexBuffer;
uint32 NumIndices = NumPrimitives() * 3;
IndexBuffer.AddUninitialized(NumIndices);
uint16* Out = (uint16*)IndexBuffer.GetData();
for(uint32 y = 0; y < Height; ++y)
{
for(uint32 x = 0; x < Width; ++x)
{
// left top to bottom right in reading order
uint16 Index00 = x + y * (Width + 1);
uint16 Index10 = Index00 + 1;
uint16 Index01 = Index00 + (Width + 1);
uint16 Index11 = Index01 + 1;
// todo: diagonal can be flipped on parts of the screen
// triangle A
*Out++ = Index00; *Out++ = Index01; *Out++ = Index10;
// triangle B
*Out++ = Index11; *Out++ = Index10; *Out++ = Index01;
}
}
// Create index buffer. Fill buffer with initial data upon creation
FRHIResourceCreateInfo CreateInfo(&IndexBuffer);
IndexBufferRHI = RHICreateIndexBuffer(sizeof(uint16), IndexBuffer.GetResourceDataSize(), BUF_Static, CreateInfo);
}
/** Initialize the RHI for this rendering resource */
void InitRHI() override
{
TResourceArray<FFilterVertex, VERTEXBUFFER_ALIGNMENT> Vertices;
Vertices.SetNumUninitialized(6);
Vertices[0].Position = FVector4(1, 1, 0, 1);
Vertices[0].UV = FVector2D(1, 1);
Vertices[1].Position = FVector4(0, 1, 0, 1);
Vertices[1].UV = FVector2D(0, 1);
Vertices[2].Position = FVector4(1, 0, 0, 1);
Vertices[2].UV = FVector2D(1, 0);
Vertices[3].Position = FVector4(0, 0, 0, 1);
Vertices[3].UV = FVector2D(0, 0);
//The final two vertices are used for the triangle optimization (a single triangle spans the entire viewport )
Vertices[4].Position = FVector4(-1, 1, 0, 1);
Vertices[4].UV = FVector2D(-1, 1);
Vertices[5].Position = FVector4(1, -1, 0, 1);
Vertices[5].UV = FVector2D(1, -1);
// Create vertex buffer. Fill buffer with initial data upon creation
FRHIResourceCreateInfo CreateInfo(&Vertices);
VertexBufferRHI = RHICreateVertexBuffer(Vertices.GetResourceDataSize(), BUF_Static, CreateInfo);
}
/**
* Initialize the RHI for this rendering resource
*/
void InitRHI() override
{
const int32 NumVerts = 8;
TResourceArray<FVector4, VERTEXBUFFER_ALIGNMENT> Verts;
Verts.SetNumUninitialized(NumVerts);
for (uint32 Z = 0; Z < 2; Z++)
{
for (uint32 Y = 0; Y < 2; Y++)
{
for (uint32 X = 0; X < 2; X++)
{
const FVector4 Vertex = FVector4(
(X ? -1 : 1),
(Y ? -1 : 1),
(Z ? -1 : 1),
1.0f
);
Verts[GetCubeVertexIndex(X, Y, Z)] = Vertex;
}
}
}
uint32 Size = Verts.GetResourceDataSize();
// Create vertex buffer. Fill buffer with initial data upon creation
FRHIResourceCreateInfo CreateInfo(&Verts);
VertexBufferRHI = RHICreateVertexBuffer(Size, BUF_Static, CreateInfo);
}
/** Initialize the RHI for this rendering resource */
void InitRHI() override
{
// Indices 0 - 5 are used for rendering a quad. Indices 6 - 8 are used for triangle optimization.
const uint16 Indices[] = { 0, 1, 2, 2, 1, 3, 0, 4, 5 };
TResourceArray<uint16, INDEXBUFFER_ALIGNMENT> IndexBuffer;
uint32 InternalNumIndices = ARRAY_COUNT(Indices);
IndexBuffer.AddUninitialized(InternalNumIndices);
FMemory::Memcpy(IndexBuffer.GetData(), Indices, InternalNumIndices * sizeof(uint16));
// Create index buffer. Fill buffer with initial data upon creation
FRHIResourceCreateInfo CreateInfo(&IndexBuffer);
IndexBufferRHI = RHICreateIndexBuffer(sizeof(uint16), IndexBuffer.GetResourceDataSize(), BUF_Static, CreateInfo);
}
/**
* Initialize the RHI for this rendering resource
*/
void InitRHI() override
{
TResourceArray<uint16, INDEXBUFFER_ALIGNMENT> Indices;
NumIndices = ARRAY_COUNT(GCubeIndices);
Indices.AddUninitialized(NumIndices);
FMemory::Memcpy(Indices.GetData(), GCubeIndices, NumIndices * sizeof(uint16));
const uint32 Size = Indices.GetResourceDataSize();
const uint32 Stride = sizeof(uint16);
// Create index buffer. Fill buffer with initial data upon creation
FRHIResourceCreateInfo CreateInfo(&Indices);
IndexBufferRHI = RHICreateIndexBuffer(Stride, Size, BUF_Static, CreateInfo);
}
void FRawStaticIndexBuffer::Serialize(FArchive& Ar, bool bNeedsCPUAccess)
{
IndexStorage.SetAllowCPUAccess(bNeedsCPUAccess);
if (Ar.UE4Ver() < VER_UE4_SUPPORT_32BIT_STATIC_MESH_INDICES)
{
TResourceArray<uint16,INDEXBUFFER_ALIGNMENT> LegacyIndices;
b32Bit = false;
LegacyIndices.BulkSerialize(Ar);
int32 NumIndices = LegacyIndices.Num();
int32 IndexStride = sizeof(uint16);
IndexStorage.Empty(NumIndices * IndexStride);
IndexStorage.AddUninitialized(NumIndices * IndexStride);
FMemory::Memcpy(IndexStorage.GetData(),LegacyIndices.GetData(),IndexStorage.Num());
}
else
{
Ar << b32Bit;
IndexStorage.BulkSerialize(Ar);
}
}
void RendererGPUBenchmark(FRHICommandListImmediate& RHICmdList, FSynthBenchmarkResults& InOut, const FSceneView& View, float WorkScale, bool bDebugOut)
{
check(IsInRenderingThread());
FRenderQueryPool TimerQueryPool(RQT_AbsoluteTime);
bool bValidGPUTimer = (FGPUTiming::GetTimingFrequency() / (1000 * 1000)) != 0;
if(!bValidGPUTimer)
{
UE_LOG(LogSynthBenchmark, Warning, TEXT("RendererGPUBenchmark failed, look for \"GPU Timing Frequency\" in the log"));
return;
}
TResourceArray<FBenchmarkVertex> Vertices;
Vertices.Reserve(GBenchmarkVertices);
for (uint32 Index = 0; Index < GBenchmarkVertices; ++Index)
{
Vertices.Emplace(Index);
}
FRHIResourceCreateInfo CreateInfo(&Vertices);
FVertexBufferRHIRef VertexBuffer = RHICreateVertexBuffer(GBenchmarkVertices * sizeof(FBenchmarkVertex), BUF_Static, CreateInfo);
// two RT to ping pong so we force the GPU to flush it's pipeline
TRefCountPtr<IPooledRenderTarget> RTItems[3];
{
FPooledRenderTargetDesc Desc(FPooledRenderTargetDesc::Create2DDesc(FIntPoint(GBenchmarkResolution, GBenchmarkResolution), PF_B8G8R8A8, FClearValueBinding::None, TexCreate_None, TexCreate_RenderTargetable | TexCreate_ShaderResource, false));
Desc.AutoWritable = false;
GRenderTargetPool.FindFreeElement(RHICmdList, Desc, RTItems[0], TEXT("Benchmark0"));
GRenderTargetPool.FindFreeElement(RHICmdList, Desc, RTItems[1], TEXT("Benchmark1"));
Desc.Extent = FIntPoint(1, 1);
Desc.Flags = TexCreate_CPUReadback; // needs TexCreate_ResolveTargetable?
Desc.TargetableFlags = TexCreate_None;
GRenderTargetPool.FindFreeElement(RHICmdList, Desc, RTItems[2], TEXT("BenchmarkReadback"));
}
// set the state
RHICmdList.SetBlendState(TStaticBlendState<>::GetRHI());
RHICmdList.SetRasterizerState(TStaticRasterizerState<>::GetRHI());
RHICmdList.SetDepthStencilState(TStaticDepthStencilState<false,CF_Always>::GetRHI());
{
// larger number means more accuracy but slower, some slower GPUs might timeout with a number to large
const uint32 IterationCount = 70;
const uint32 MethodCount = ARRAY_COUNT(InOut.GPUStats);
enum class EMethodType
{
Vertex,
Pixel
};
struct FBenchmarkMethod
{
const TCHAR* Desc;
float IndexNormalizedTime;
const TCHAR* ValueType;
float Weight;
EMethodType Type;
};
const FBenchmarkMethod Methods[] =
{
// e.g. on NV670: Method3 (mostly fill rate )-> 26GP/s (seems realistic)
// reference: http://en.wikipedia.org/wiki/Comparison_of_Nvidia_graphics_processing_units theoretical: 29.3G/s
{ TEXT("ALUHeavyNoise"), 1.0f / 4.601f, TEXT("s/GigaPix"), 1.0f, EMethodType::Pixel },
{ TEXT("TexHeavy"), 1.0f / 7.447f, TEXT("s/GigaPix"), 0.1f, EMethodType::Pixel },
{ TEXT("DepTexHeavy"), 1.0f / 3.847f, TEXT("s/GigaPix"), 0.1f, EMethodType::Pixel },
{ TEXT("FillOnly"), 1.0f / 25.463f, TEXT("s/GigaPix"), 3.0f, EMethodType::Pixel },
{ TEXT("Bandwidth"), 1.0f / 1.072f, TEXT("s/GigaPix"), 1.0f, EMethodType::Pixel },
{ TEXT("VertThroughPut1"), 1.0f / 1.537f, TEXT("s/GigaVert"), 0.0f, EMethodType::Vertex }, // TODO: Set weights
{ TEXT("VertThroughPut2"), 1.0f / 1.767f, TEXT("s/GigaVert"), 0.0f, EMethodType::Vertex }, // TODO: Set weights
};
static_assert(ARRAY_COUNT(Methods) == ARRAY_COUNT(InOut.GPUStats), "Benchmark methods descriptor array lengths should match.");
// Initialize the GPU benchmark stats
for (int32 Index = 0; Index < ARRAY_COUNT(Methods); ++Index)
{
auto& Method = Methods[Index];
InOut.GPUStats[Index] = FSynthBenchmarkStat(Method.Desc, Method.IndexNormalizedTime, Method.ValueType, Method.Weight);
}
// 0 / 1
uint32 DestRTIndex = 0;
const uint32 TimerSampleCount = IterationCount * MethodCount + 1;
static FRenderQueryRHIRef TimerQueries[TimerSampleCount];
static float LocalWorkScale[IterationCount];
for(uint32 i = 0; i < TimerSampleCount; ++i)
{
TimerQueries[i] = TimerQueryPool.AllocateQuery();
}
const bool bSupportsTimerQueries = (TimerQueries[0] != NULL);
if(!bSupportsTimerQueries)
{
UE_LOG(LogSynthBenchmark, Warning, TEXT("GPU driver does not support timer queries."));
// Temporary workaround for GL_TIMESTAMP being unavailable and GL_TIME_ELAPSED workaround breaking drivers
#if PLATFORM_MAC
GLint RendererID = 0;
float PerfScale = 1.0f;
[[NSOpenGLContext currentContext] getValues:&RendererID forParameter:NSOpenGLCPCurrentRendererID];
{
switch((RendererID & kCGLRendererIDMatchingMask))
{
case kCGLRendererATIRadeonX4000ID: // AMD 7xx0 & Dx00 series - should be pretty beefy
PerfScale = 1.2f;
break;
case kCGLRendererATIRadeonX3000ID: // AMD 5xx0, 6xx0 series - mostly OK
case kCGLRendererGeForceID: // Nvidia 6x0 & 7x0 series - mostly OK
PerfScale = 2.0f;
break;
case kCGLRendererIntelHD5000ID: // Intel HD 5000, Iris, Iris Pro - not dreadful
PerfScale = 4.2f;
break;
case kCGLRendererIntelHD4000ID: // Intel HD 4000 - quite slow
PerfScale = 7.5f;
break;
case kCGLRendererATIRadeonX2000ID: // ATi 4xx0, 3xx0, 2xx0 - almost all very slow and drivers are now very buggy
case kCGLRendererGeForce8xxxID: // Nvidia 3x0, 2x0, 1x0, 9xx0, 8xx0 - almost all very slow
case kCGLRendererIntelHDID: // Intel HD 3000 - very, very slow and very buggy driver
default:
PerfScale = 10.0f;
break;
}
}
for (int32 Index = 0; Index < MethodCount; ++Index)
{
FSynthBenchmarkStat& Stat = InOut.GPUStats[Index];
Stat.SetMeasuredTime(FTimeSample(PerfScale, PerfScale * Methods[Index].IndexNormalizedTime));
}
#endif
return;
}
// TimingValues are in Seconds
FTimingSeries TimingSeries[MethodCount];
// in 1/1000000 Seconds
uint64 TotalTimes[MethodCount];
for(uint32 MethodIterator = 0; MethodIterator < MethodCount; ++MethodIterator)
{
TotalTimes[MethodIterator] = 0;
TimingSeries[MethodIterator].Init(IterationCount);
}
RHICmdList.EndRenderQuery(TimerQueries[0]);
// multiple iterations to see how trust able the values are
for(uint32 Iteration = 0; Iteration < IterationCount; ++Iteration)
{
for(uint32 MethodIterator = 0; MethodIterator < MethodCount; ++MethodIterator)
{
// alternate between forward and backward (should give the same number)
// uint32 MethodId = (Iteration % 2) ? MethodIterator : (MethodCount - 1 - MethodIterator);
uint32 MethodId = MethodIterator;
uint32 QueryIndex = 1 + Iteration * MethodCount + MethodId;
// 0 / 1
const uint32 SrcRTIndex = 1 - DestRTIndex;
GRenderTargetPool.VisualizeTexture.SetCheckPoint(RHICmdList, RTItems[DestRTIndex]);
SetRenderTarget(RHICmdList, RTItems[DestRTIndex]->GetRenderTargetItem().TargetableTexture, FTextureRHIRef(), true);
// decide how much work we do in this pass
LocalWorkScale[Iteration] = (Iteration / 10.f + 1.f) * WorkScale;
RunBenchmarkShader(RHICmdList, VertexBuffer, View, MethodId, RTItems[SrcRTIndex], LocalWorkScale[Iteration]);
RHICmdList.CopyToResolveTarget(RTItems[DestRTIndex]->GetRenderTargetItem().TargetableTexture, RTItems[DestRTIndex]->GetRenderTargetItem().ShaderResourceTexture, false, FResolveParams());
/*if(bGPUCPUSync)
{
// more consistent timing but strangely much faster to the level that is unrealistic
FResolveParams Param;
Param.Rect = FResolveRect(0, 0, 1, 1);
RHICmdList.CopyToResolveTarget(
RTItems[DestRTIndex]->GetRenderTargetItem().TargetableTexture,
RTItems[2]->GetRenderTargetItem().ShaderResourceTexture,
false,
Param);
void* Data = 0;
int Width = 0;
int Height = 0;
RHIMapStagingSurface(RTItems[2]->GetRenderTargetItem().ShaderResourceTexture, Data, Width, Height);
RHIUnmapStagingSurface(RTItems[2]->GetRenderTargetItem().ShaderResourceTexture);
}*/
RHICmdList.EndRenderQuery(TimerQueries[QueryIndex]);
// ping pong
DestRTIndex = 1 - DestRTIndex;
}
}
{
uint64 OldAbsTime = 0;
// flushes the RHI thread to make sure all RHICmdList.EndRenderQuery() commands got executed.
RHICmdList.ImmediateFlush(EImmediateFlushType::FlushRHIThread);
RHICmdList.GetRenderQueryResult(TimerQueries[0], OldAbsTime, true);
TimerQueryPool.ReleaseQuery(TimerQueries[0]);
for(uint32 Iteration = 0; Iteration < IterationCount; ++Iteration)
{
uint32 Results[MethodCount];
for(uint32 MethodId = 0; MethodId < MethodCount; ++MethodId)
{
uint32 QueryIndex = 1 + Iteration * MethodCount + MethodId;
uint64 AbsTime;
RHICmdList.GetRenderQueryResult(TimerQueries[QueryIndex], AbsTime, true);
TimerQueryPool.ReleaseQuery(TimerQueries[QueryIndex]);
uint64 RelTime = FMath::Max(AbsTime - OldAbsTime, 1ull);
TotalTimes[MethodId] += RelTime;
Results[MethodId] = RelTime;
OldAbsTime = AbsTime;
}
for(uint32 MethodId = 0; MethodId < MethodCount; ++MethodId)
{
float TimeInSec = Results[MethodId] / 1000000.0f;
if (Methods[MethodId].Type == EMethodType::Vertex)
{
// to normalize from seconds to seconds per GVert
float SamplesInGVert = LocalWorkScale[Iteration] * GBenchmarkVertices / 1000000000.0f;
TimingSeries[MethodId].SetEntry(Iteration, TimeInSec / SamplesInGVert);
}
else
{
check(Methods[MethodId].Type == EMethodType::Pixel);
// to normalize from seconds to seconds per GPixel
float SamplesInGPix = LocalWorkScale[Iteration] * GBenchmarkResolution * GBenchmarkResolution / 1000000000.0f;
// TimingValue in Seconds per GPixel
TimingSeries[MethodId].SetEntry(Iteration, TimeInSec / SamplesInGPix);
}
}
}
if(bSupportsTimerQueries)
{
for(uint32 MethodId = 0; MethodId < MethodCount; ++MethodId)
{
float Confidence = 0.0f;
// in seconds per GPixel
float NormalizedTime = TimingSeries[MethodId].ComputeValue(Confidence);
if(Confidence > 0)
{
FTimeSample TimeSample(TotalTimes[MethodId] / 1000000.0f, NormalizedTime);
InOut.GPUStats[MethodId].SetMeasuredTime(TimeSample, Confidence);
}
}
}
}
}