Method CreateBindSet

src/DX12/DX12EngineInterfaceImpl.cpp:549–610

}

std::unique_ptr<EI_BindSet> EI_Device::CreateBindSet(EI_BindLayout* layout, EI_BindSetDescription& bindSet)
{
    EI_BindSet* result = new EI_BindSet;
    assert(layout->layoutBindings.size() == bindSet.resources.size());

    UINT numTotalSlotsNeededInDeScriptorTable = 0;
    int numBindings = (int)layout->layoutBindings.size();

    // On DX12, we can't mix samplers with other resource types, so validate that all resources in the bind set are all samplers, or all other
    bool IsSamplerBindSet = (bindSet.resources[0]->m_ResourceType == EI_ResourceType::Sampler);

    for (int i = 0; i < numBindings; i++)
    {
        UINT numSlotsNeededInDeScriptorTable = layout->layoutBindings[i].BaseShaderRegister + layout->layoutBindings[i].NumDescriptors;
        if (numSlotsNeededInDeScriptorTable > numTotalSlotsNeededInDeScriptorTable)
            numTotalSlotsNeededInDeScriptorTable = numSlotsNeededInDeScriptorTable;
        assert(!IsSamplerBindSet || (IsSamplerBindSet && bindSet.resources[i]->m_ResourceType == EI_ResourceType::Sampler) && "Samplers cannot be mixed with other resource types. Please re-organize your layout/bindset");
    }

    if (!IsSamplerBindSet)
        m_resourceViewHeaps.AllocCBV_SRV_UAVDescriptor(numTotalSlotsNeededInDeScriptorTable, static_cast<CAULDRON_DX12::CBV_SRV_UAV*>(&result->descriptorTable));
    else
        m_resourceViewHeaps.AllocSamplerDescriptor(numTotalSlotsNeededInDeScriptorTable, static_cast<CAULDRON_DX12::SAMPLER*>(&result->descriptorTable));

    for (int i = 0; i < numBindings; i++)
    {
        assert(layout->layoutBindings[i].NumDescriptors == 1);
        UINT descriptorIdx = i;
        switch (layout->description.resources[i].type)
        {
        case EI_RESOURCETYPE_BUFFER_RW:
            bindSet.resources[i]->m_pBuffer->CreateUAV(descriptorIdx, static_cast<CAULDRON_DX12::CBV_SRV_UAV*>(&result->descriptorTable));
            break;
        case EI_RESOURCETYPE_BUFFER_RO:
            bindSet.resources[i]->m_pBuffer->CreateSRV(descriptorIdx, static_cast<CAULDRON_DX12::CBV_SRV_UAV*>(&result->descriptorTable));
            break;
        case EI_RESOURCETYPE_IMAGE_RW:
            if (bindSet.resources[i]->m_ResourceType == EI_ResourceType::Buffer)
                bindSet.resources[i]->m_pBuffer->CreateUAV(descriptorIdx, &result->descriptorTable);  // Override the descriptor pointers used with our own which are properly allocated for clearing/writing
            else
                bindSet.resources[i]->m_pTexture->CreateUAV(descriptorIdx, static_cast<CAULDRON_DX12::CBV_SRV_UAV*>(&result->descriptorTable));
            break;
        case EI_RESOURCETYPE_IMAGE_RO:
            if (bindSet.resources[i]->m_ResourceType == EI_ResourceType::Buffer)
                bindSet.resources[i]->m_pBuffer->CreateSRV(descriptorIdx, &result->descriptorTable);  // Override the descriptor pointers used with our own which are properly allocated for clearing/writing
            else
                bindSet.resources[i]->m_pTexture->CreateSRV(descriptorIdx, static_cast<CAULDRON_DX12::CBV_SRV_UAV*>(&result->descriptorTable), 0);
            break;
        case EI_RESOURCETYPE_UNIFORM:
            bindSet.resources[i]->m_pBuffer->CreateCBV(descriptorIdx, static_cast<CAULDRON_DX12::CBV_SRV_UAV*>(&result->descriptorTable));
            break;
        case EI_RESOURCETYPE_SAMPLER:
            m_device.GetDevice()->CreateSampler(&bindSet.resources[i]->samplerDesc, static_cast<CAULDRON_DX12::SAMPLER*>(&result->descriptorTable)->GetCPU());
            break;
        default:
            assert(0);
            break;
        }