Hello!
What am I trying to do is blur mask. Say I would like to have everything blurred EXCEPT circle in the middle(you can observe such in shooter games, while aiming).
In my vision, to support masked blurring, I have to have such mask as a 2d texture with alpha channel values indicating whether we blur pixel or not.
The problem here, I can't upload alpha texture(only alpha channel exists(DXGI_FORMAT_A8_UNORM)) to shader. For every pixel I checked alpha in shader, I got 0.
I attached code of creation and using shader resource.
Here is how I use this texture in shader:
Texture2D gMask : register(t1);
if (gMask[int2(0,0)].a > 0)
{
// simple check that there is no 0 at 0,0
}
Code where I create descriptors:
const int textureDescriptorCount = 1;
const int blurDescriptorCount = 4;
THROW_IF_NOK(m_cmdAllocator->Reset());
THROW_IF_NOK(m_cmdList->Reset(m_cmdAllocator.Get(), nullptr));
m_srvHeap = CreateDescHeap(EDescHeapType::DHT_SRV, textureDescriptorCount + blurDescriptorCount + 1/*blurmask*/);
m_cbvSrvUavDescriptorSize = m_device->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV);
CD3DX12_CPU_DESCRIPTOR_HANDLE hDescriptor(m_srvHeap->GetCPUDescriptorHandleForHeapStart());
DirectX::CreateDDSTextureFromFile12(m_device.Get(), m_cmdList.Get(), L"../Bin/Debug/Arissa_DIFF_diffuse_PNG_BC7_1.DDS", m_textureRes, m_texUplHeap);
D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
srvDesc.Format = m_textureRes->GetDesc().Format;
srvDesc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D;
srvDesc.Texture2D.MostDetailedMip = 0;
srvDesc.Texture2D.MipLevels = m_textureRes->GetDesc().MipLevels;
srvDesc.Texture2D.ResourceMinLODClamp = 0.0f;
m_device->CreateShaderResourceView(m_textureRes.Get(), &srvDesc, hDescriptor);
// Blur
m_blurFilter->BuildDescriptors(
CD3DX12_CPU_DESCRIPTOR_HANDLE(m_srvHeap->GetCPUDescriptorHandleForHeapStart(), 1, m_cbvSrvUavDescriptorSize),
CD3DX12_GPU_DESCRIPTOR_HANDLE(m_srvHeap->GetGPUDescriptorHandleForHeapStart(), 1, m_cbvSrvUavDescriptorSize),
m_cbvSrvUavDescriptorSize);
//
Root Signature:
void RenderEngine::CreateRootDescriptionForBlur()
{
CD3DX12_DESCRIPTOR_RANGE srvTable;
srvTable.Init(D3D12_DESCRIPTOR_RANGE_TYPE_SRV, 1, 0);
CD3DX12_DESCRIPTOR_RANGE uavTable;
uavTable.Init(D3D12_DESCRIPTOR_RANGE_TYPE_UAV, 1, 0);
CD3DX12_DESCRIPTOR_RANGE srvTable2;
srvTable2.Init(D3D12_DESCRIPTOR_RANGE_TYPE_SRV, 1, 1);
CD3DX12_ROOT_PARAMETER slotRootParameter[4];
slotRootParameter[0].InitAsConstants(14, 0);
slotRootParameter[1].InitAsDescriptorTable(1, &srvTable);
slotRootParameter[2].InitAsDescriptorTable(1, &uavTable);
slotRootParameter[3].InitAsDescriptorTable(1, &srvTable2);
CD3DX12_ROOT_SIGNATURE_DESC rootSigDesc(4, slotRootParameter,
0, nullptr,
D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT);
ComPtr<ID3DBlob> serializedRootSig = nullptr;
ComPtr<ID3DBlob> errorBlob = nullptr;
HRESULT hr = D3D12SerializeRootSignature(&rootSigDesc, D3D_ROOT_SIGNATURE_VERSION_1,
serializedRootSig.GetAddressOf(), errorBlob.GetAddressOf());
if (errorBlob != nullptr)
{
::OutputDebugStringA((char*)errorBlob->GetBufferPointer());
}
THROW_IF_NOK(hr);
THROW_IF_NOK(m_device->CreateRootSignature(
0,
serializedRootSig->GetBufferPointer(),
serializedRootSig->GetBufferSize(),
IID_PPV_ARGS(m_rootSignatures["blur"].GetAddressOf())));
}
And lastly part of code in Render() method related to Blur:
// Blur here
auto blurMsk = renderScene->GetBlurMask();
m_blurFilter->SetBlurMask(blurMsk.c_str(), m_cmdList.Get());
m_blurFilter->Execute(m_cmdList.Get(), m_rootSignatures["blur"].Get(),
m_PSOs["horzBlur"].Get(), m_PSOs["vertBlur"].Get(), backBuffer.Get(), 4, blurMsk);
// Prepare to copy blurred output to the back buffer.
m_cmdList->ResourceBarrier(1, &CD3DX12_RESOURCE_BARRIER::Transition(backBuffer.Get(),
D3D12_RESOURCE_STATE_COPY_SOURCE, D3D12_RESOURCE_STATE_COPY_DEST));
m_cmdList->CopyResource(backBuffer.Get(), m_blurFilter->Output());
m_blurFilter->ResetResources(m_cmdList.Get());
//
/// present
TransitionResource(m_cmdList, backBuffer, D3D12_RESOURCE_STATE_COPY_DEST, D3D12_RESOURCE_STATE_PRESENT);
I assume I failed somewhere in code of creation\uploading texture. That code I took partially from here - https://github.com/microsoft/DirectXTex/blob/master/DDSTextureLoader/DDSTextureLoader12.cpp
I can't sleep and hardly eat, because of this issue, will appreciate any help.
Thanks
