void VolumetricLighting::InitRenderTarget(SetupContext& context) {
if (!m_outputTexturesInited) {
m_outputTexturesInited = true;
using gxapi::eFormat;
auto formatSDFCullData = eFormat::R32_UINT;
auto formatDst = eFormat::R16G16B16A16_FLOAT;
gxapi::UavTexture2DArray uavDesc;
uavDesc.activeArraySize = 1;
uavDesc.firstArrayElement = 0;
uavDesc.mipLevel = 0;
uavDesc.planeIndex = 0;
gxapi::SrvTexture2DArray srvDesc;
srvDesc.activeArraySize = 1;
srvDesc.firstArrayElement = 0;
srvDesc.numMipLevels = -1;
srvDesc.mipLevelClamping = 0;
srvDesc.mostDetailedMip = 0;
srvDesc.planeIndex = 0;
uint32_t dispatchW, dispatchH;
SetWorkgroupSize((unsigned)m_depthTexSrv.GetResource().GetWidth(), (unsigned)m_depthTexSrv.GetResource().GetHeight(), 16, 16, dispatchW, dispatchH);
//TODO 1D tex
Texture2DDesc desc;
desc.width = dispatchW * dispatchH;
desc.height = 1024;
desc.format = formatSDFCullData;
TextureUsage uavusage{ true, true, false, true };
Texture2D sdfCullDataTex = context.CreateTexture2D(desc, uavusage);
sdfCullDataTex.SetName("SDF culling sdf cull data tex");
m_sdfCullDataUAV = context.CreateUav(sdfCullDataTex, formatSDFCullData, uavDesc);
m_sdfCullDataSRV = context.CreateSrv(sdfCullDataTex, formatSDFCullData, srvDesc);
for (int c = 0; c < 2; ++c) {
desc.width = m_depthTexSrv.GetResource().GetWidth();
desc.height = m_depthTexSrv.GetResource().GetHeight();
desc.format = formatDst;
Texture2D dstTex = context.CreateTexture2D(desc, uavusage);
sdfCullDataTex.SetName("SDF culling dst tex");
m_volDstTexUAV[c] = context.CreateUav(dstTex, formatDst, uavDesc);
m_volDstTexUAV[c].GetResource().SetName((std::string("SDF culling vol dst UAV") + std::to_string(c)).c_str());
}
desc.width = m_depthTexSrv.GetResource().GetWidth();
desc.height = m_depthTexSrv.GetResource().GetHeight();
desc.format = formatDst;
Texture2D dstTex = context.CreateTexture2D(desc, uavusage);
sdfCullDataTex.SetName("SDF culling dst tex");
m_dstTexUAV = context.CreateUav(dstTex, formatDst, uavDesc);
}
}
void DepthReduction::InitRenderTarget(SetupContext& context) {
using gxapi::eFormat;
auto formatDepthReductionResult = eFormat::R32G32_FLOAT;
gxapi::UavTexture2DArray uavDesc;
uavDesc.activeArraySize = 1;
uavDesc.firstArrayElement = 0;
uavDesc.mipLevel = 0;
uavDesc.planeIndex = 0;
gxapi::SrvTexture2DArray srvDesc;
srvDesc.activeArraySize = 1;
srvDesc.firstArrayElement = 0;
srvDesc.numMipLevels = -1;
srvDesc.mipLevelClamping = 0;
srvDesc.mostDetailedMip = 0;
srvDesc.planeIndex = 0;
unsigned dispatchW, dispatchH;
SetWorkgroupSize((unsigned)std::ceil(m_width * 0.5f), m_height, 16, 16, dispatchW, dispatchH);
Texture2D tex = context.CreateTexture2D({ dispatchW, dispatchH, formatDepthReductionResult }, { true, true, false, true });
tex.SetName("Depth reduction intermediate texture");
m_uav = context.CreateUav(tex, formatDepthReductionResult, uavDesc);
m_srv = context.CreateSrv(tex, formatDepthReductionResult, srvDesc);
}