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Add new GPU Query API that is lightweight and supports occlusion queries

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This commit is contained in:
Wojtek Figat
2026-01-16 10:40:30 +01:00
parent d2d7a871ce
commit 9ac231c403
31 changed files with 829 additions and 254 deletions
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37
Source/Engine/GraphicsDevice/DirectX/DX12/GPUTimerQueryDX12.cpp
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@@ -20,9 +20,7 @@ void GPUTimerQueryDX12::OnReleaseGPU()
void GPUTimerQueryDX12::Begin()
{
const auto context = _device->GetMainContextDX12();
auto& heap = _device->TimestampQueryHeap;
heap.EndQuery(context, _begin);
_query = context->BeginQuery(GPUQueryType::Timer);
_hasResult = false;
_endCalled = false;
}
@@ -31,14 +29,8 @@ void GPUTimerQueryDX12::End()
{
if (_endCalled)
return;
const auto context = _device->GetMainContextDX12();
auto& heap = _device->TimestampQueryHeap;
heap.EndQuery(context, _end);
const auto queue = _device->GetCommandQueue()->GetCommandQueue();
VALIDATE_DIRECTX_CALL(queue->GetTimestampFrequency(&_gpuFrequency));
context->EndQuery(_query);
_endCalled = true;
}
@@ -48,33 +40,16 @@ bool GPUTimerQueryDX12::HasResult()
return false;
if (_hasResult)
return true;
auto& heap = _device->TimestampQueryHeap;
return heap.IsReady(_end) && heap.IsReady(_begin);
uint64 result;
return _device->GetQueryResult(_query, result, false);
}
float GPUTimerQueryDX12::GetResult()
{
if (_hasResult)
{
return _timeDelta;
}
const uint64 timeBegin = *(uint64*)_device->TimestampQueryHeap.ResolveQuery(_begin);
const uint64 timeEnd = *(uint64*)_device->TimestampQueryHeap.ResolveQuery(_end);
// Calculate event duration in milliseconds
if (timeEnd > timeBegin)
{
const uint64 delta = timeEnd - timeBegin;
const double frequency = double(_gpuFrequency);
_timeDelta = static_cast<float>((delta / frequency) * 1000.0);
}
else
{
_timeDelta = 0.0f;
}
uint64 result;
_timeDelta = _device->GetQueryResult(_query, result, true) ? (float)((double)result / 1000.0) : 0.0f;
_hasResult = true;
return _timeDelta;
}