本文整理汇总了C++中device::CreateQueryHeap方法的典型用法代码示例。如果您正苦于以下问题：C++ device::CreateQueryHeap方法的具体用法？C++ device::CreateQueryHeap怎么用？C++ device::CreateQueryHeap使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类device的用法示例。
在下文中一共展示了device::CreateQueryHeap方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: sizeof
timestamp_query::timestamp_query(device const& dvc, dx12u::cmd_queue const& q, int gpu_ordinal, std::size_t max_num_query) : num_query(max_num_query)
{
if (!dvc.Get())
{
throw error{ "null device" };
}
std::uint32_t gpu_mask = gpu_ordinal < 0 ? 1 : (1u << static_cast<std::uint32_t>(gpu_ordinal));
// alloc query buffer
size_t buf_aligned_sz = (num_query * sizeof(std::uint64_t) + 4095) & ~4095; // page aligned
auto heap_read_back = CD3DX12_HEAP_PROPERTIES(D3D12_HEAP_TYPE_READBACK, gpu_mask, gpu_mask);
auto buffer_desc = CD3DX12_RESOURCE_DESC::Buffer(buf_aligned_sz);
auto r = dvc->CreateCommittedResource(&heap_read_back, D3D12_HEAP_FLAG_NONE,
&buffer_desc, D3D12_RESOURCE_STATE_COPY_DEST, nullptr, IID_PPV_ARGS(&buffer));
dx12u::throw_if_error(r, "timestamp resource creation failure");
// query heap
D3D12_QUERY_HEAP_DESC heap_desc{};
heap_desc.Type = D3D12_QUERY_HEAP_TYPE_TIMESTAMP;
heap_desc.Count = static_cast<std::uint32_t>(num_query);
heap_desc.NodeMask = gpu_mask;
r = dvc->CreateQueryHeap(&heap_desc, IID_PPV_ARGS(&qh));
dx12u::throw_if_error(r, "timestamp query heap creation failure");
// clock frequency
dvc->SetStablePowerState(true);
q.get_com_ptr()->GetTimestampFrequency(&clock_freq);
}