83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
// Copyright (c) 2012-2023 Wojciech Figat. All rights reserved.
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#if GRAPHICS_API_DIRECTX12
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#include "GPUTimerQueryDX12.h"
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#include "GPUContextDX12.h"
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GPUTimerQueryDX12::GPUTimerQueryDX12(GPUDeviceDX12* device)
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: GPUResourceDX12<GPUTimerQuery>(device, String::Empty)
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{
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}
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void GPUTimerQueryDX12::OnReleaseGPU()
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{
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_hasResult = false;
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_endCalled = false;
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_timeDelta = 0.0f;
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}
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void GPUTimerQueryDX12::Begin()
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{
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const auto context = _device->GetMainContextDX12();
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auto& heap = _device->TimestampQueryHeap;
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heap.EndQuery(context, _begin);
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_hasResult = false;
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_endCalled = false;
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}
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void GPUTimerQueryDX12::End()
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{
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if (_endCalled)
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return;
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const auto context = _device->GetMainContextDX12();
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auto& heap = _device->TimestampQueryHeap;
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heap.EndQuery(context, _end);
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const auto queue = _device->GetCommandQueue()->GetCommandQueue();
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VALIDATE_DIRECTX_CALL(queue->GetTimestampFrequency(&_gpuFrequency));
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_endCalled = true;
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}
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bool GPUTimerQueryDX12::HasResult()
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{
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if (!_endCalled)
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return false;
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if (_hasResult)
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return true;
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auto& heap = _device->TimestampQueryHeap;
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return heap.IsReady(_end) && heap.IsReady(_begin);
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}
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float GPUTimerQueryDX12::GetResult()
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{
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if (_hasResult)
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{
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return _timeDelta;
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}
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const uint64 timeBegin = *(uint64*)_device->TimestampQueryHeap.ResolveQuery(_begin);
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const uint64 timeEnd = *(uint64*)_device->TimestampQueryHeap.ResolveQuery(_end);
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// Calculate event duration in milliseconds
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if (timeEnd > timeBegin)
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{
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const uint64 delta = timeEnd - timeBegin;
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const double frequency = double(_gpuFrequency);
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_timeDelta = static_cast<float>((delta / frequency) * 1000.0);
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}
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else
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{
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_timeDelta = 0.0f;
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}
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_hasResult = true;
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return _timeDelta;
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}
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#endif
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