D3D11 CreateTexture2D的D3D12等效项是什么?

问题描述

我是Direct3d编程的新手，我一直在构建一个简单的Windows应用程序，用d3d12依次显示4张图像.我了解D3D12架构的基本知识，到目前为止，我已经创建了四个命令分配器(backb缓冲区大小= 4)，一个命令列表，一个命令队列，描述符堆和围栏.我还使用WIC从文件中加载了我的图像.我知道我必须以某种方式将图像纹理数据作为资源.尽管该部分仍不清楚，但我想澄清一下如何在d3d12中从加载的图像中制作纹理.

I'm new to direct3d programming and I have been building a simple windows application to display 4 images one after other with d3d12.I know a basic understanding of the D3D12 architecture and so far I've created four command allocator (backb buffer size = 4) , a command list, a command queue, descriptor heap, and a fence. I also have loaded my images from file using WIC.I know somehow I have to make image texture data as a resource. While that part is still not clear, I'd like to clarify how I can make texture out of a loaded image in d3d12.

推荐答案

在D3D12HelloTexture示例中，演示了Direct3D 12纹理上传的基础. -Graphics-Samples"rel =" nofollow> DirectX-Graphics-Samples GitHub repro.

The basics of Direct3D 12 texture upload is demonstrated in the D3D12HelloTexture sample on the DirectX-Graphics-Samples GitHub repro.

ComPtr<ID3D12Resource> textureUploadHeap;

// Create the texture.
{
    // Describe and create a Texture2D.
    D3D12_RESOURCE_DESC textureDesc = {};
    textureDesc.MipLevels = 1;
    textureDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
    textureDesc.Width = TextureWidth;
    textureDesc.Height = TextureHeight;
    textureDesc.Flags = D3D12_RESOURCE_FLAG_NONE;
    textureDesc.DepthOrArraySize = 1;
    textureDesc.SampleDesc.Count = 1;
    textureDesc.SampleDesc.Quality = 0;
    textureDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;

    ThrowIfFailed(m_device->CreateCommittedResource(
        &CD3DX12_HEAP_PROPERTIES(D3D12_HEAP_TYPE_DEFAULT),
        D3D12_HEAP_FLAG_NONE,
        &textureDesc,
        D3D12_RESOURCE_STATE_COPY_DEST,
        nullptr,
        IID_PPV_ARGS(&m_texture)));

    const UINT64 uploadBufferSize = GetRequiredIntermediateSize(m_texture.Get(), 0, 1);

    // Create the GPU upload buffer.
    ThrowIfFailed(m_device->CreateCommittedResource(
        &CD3DX12_HEAP_PROPERTIES(D3D12_HEAP_TYPE_UPLOAD),
        D3D12_HEAP_FLAG_NONE,
        &CD3DX12_RESOURCE_DESC::Buffer(uploadBufferSize),
        D3D12_RESOURCE_STATE_GENERIC_READ,
        nullptr,
        IID_PPV_ARGS(&textureUploadHeap)));

    // Copy data to the intermediate upload heap and then schedule a copy
    // from the upload heap to the Texture2D.
    std::vector<UINT8> texture = GenerateTextureData();

    D3D12_SUBRESOURCE_DATA textureData = {};
    textureData.pData = &texture[0];
    textureData.RowPitch = TextureWidth * TexturePixelSize;
    textureData.SlicePitch = textureData.RowPitch * TextureHeight;

    UpdateSubresources(m_commandList.Get(), m_texture.Get(), textureUploadHeap.Get(), 0, 0, 1, &textureData);
    m_commandList->ResourceBarrier(1, &CD3DX12_RESOURCE_BARRIER::Transition(m_texture.Get(), D3D12_RESOURCE_STATE_COPY_DEST, D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE));

    // Describe and create a SRV for the texture.
    D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
    srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
    srvDesc.Format = textureDesc.Format;
    srvDesc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D;
    srvDesc.Texture2D.MipLevels = 1;
    m_device->CreateShaderResourceView(m_texture.Get(), &srvDesc, m_srvHeap->GetCPUDescriptorHandleForHeapStart());
}

它使用UpdateSubresources辅助函数 D3DX12.h C ++内联仅实用程序头文件.

It uses the UpdateSubresources helper function the D3DX12.h C++ inline only utility header.

更新: DirectX12的DirectX工具套件现已可用.看看 DDSTextureLoader 和 WICTextureLoader .

UPDATE: DirectX Tool Kit for DirectX12 is now available. Take a look at DDSTextureLoader and WICTextureLoader.

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