Method DX11Texture3

GTE/Graphics/DX11/DX11Texture3.cpp:12–93

using namespace gte;

DX11Texture3::DX11Texture3(ID3D11Device* device, Texture3 const* texture)
    :
    DX11TextureSingle(texture)
{
    // Specify the texture description.
    D3D11_TEXTURE3D_DESC desc;
    desc.Width = texture->GetWidth();
    desc.Height = texture->GetHeight();
    desc.Depth = texture->GetThickness();
    desc.MipLevels = texture->GetNumLevels();
    desc.Format = static_cast<DXGI_FORMAT>(texture->GetFormat());
    desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
    desc.MiscFlags = D3D11_RESOURCE_MISC_NONE;
    uint32_t usage = texture->GetUsage();
    if (usage == Resource::Usage::IMMUTABLE)
    {
        desc.Usage = D3D11_USAGE_IMMUTABLE;
        desc.CPUAccessFlags = D3D11_CPU_ACCESS_NONE;
    }
    else if (usage == Resource::Usage::DYNAMIC_UPDATE)
    {
        desc.Usage = D3D11_USAGE_DYNAMIC;
        desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
    }
    else  // usage == Resource::Usage::SHADER_OUTPUT
    {
        desc.Usage = D3D11_USAGE_DEFAULT;
        desc.BindFlags |= D3D11_BIND_UNORDERED_ACCESS;
        desc.CPUAccessFlags = D3D11_CPU_ACCESS_NONE;
    }

    if (texture->WantAutogenerateMipmaps())
    {
        desc.Usage = D3D11_USAGE_DEFAULT;
        desc.BindFlags |= D3D11_BIND_RENDER_TARGET;
        desc.CPUAccessFlags = D3D11_CPU_ACCESS_NONE;
        desc.MiscFlags |= D3D11_RESOURCE_MISC_GENERATE_MIPS;
    }

    // Create the texture.
    ID3D11Texture3D* dxTexture = nullptr;
    if (texture->GetData())
    {
        uint32_t const numSubresources = texture->GetNumSubresources();
        std::vector<D3D11_SUBRESOURCE_DATA> data(numSubresources);
        for (uint32_t index = 0; index < numSubresources; ++index)
        {
            auto sr = texture->GetSubresource(index);
            data[index].pSysMem = sr.data;
            data[index].SysMemPitch = sr.rowPitch;
            data[index].SysMemSlicePitch = sr.slicePitch;
        }
        DX11Log(device->CreateTexture3D(&desc, &data[0], &dxTexture));
    }
    else
    {
        DX11Log(device->CreateTexture3D(&desc, nullptr, &dxTexture));
    }