How to get bitmap data from ID3D11Texture2D?

Question

Subject

Answer 1

I just recently solved the same problem. Please see below. There might be other ways to do this but this is how I did it.

You can get a IDXGISurface2 from ID3D11Texture2D and then use CreateSharedBitmap to get a bitmap data.

------Code -----

ComPtr<ID3D11Texture2D> texture;

CD3D11_TEXTURE2D_DESCbbDesc;

bbDesc.Width =

static_cast<UINT>(m_renderTargetSize.Width);

bbDesc.Height =

static_cast<UINT>(m_renderTargetSize.Height);

bbDesc.Format =

DXGI_FORMAT_B8G8R8A8_UNORM;

bbDesc.Usage =

D3D11_USAGE_DEFAULT;

            bbDesc.CPUAccessFlags = 0;

            bbDesc.BindFlags =

D3D11_BIND_RENDER_TARGET| D3D11_BIND_SHADER_RESOURCE;

bbDesc.ArraySize = 1;

bbDesc.MipLevels = 1;

bbDesc.MiscFlags = 0;

bbDesc.SampleDesc.Count = 1;

bbDesc.SampleDesc.Quality = 0;

MEDIA::ThrowIfFailed(

m_spDX11Device->CreateTexture2D(

&bbDesc,

nullptr,

&texture

)

);

ComPtr<IDXGISurface2> surface;

    MEDIA::ThrowIfFailed(

texture.Get()->QueryInterface(

__uuidof(IDXGISurface2), &surface)

);

DXGI_SURFACE_DESCdesc;

D2D1_BITMAP_PROPERTIESbp;

surface->GetDesc(&desc);

bp.pixelFormat = PixelFormat(desc.Format,

D2D1_ALPHA_MODE_IGNORE);

bp.dpiX = bp.dpiY = 0.0f;

 

ComPtr<ID2D1Bitmap> bitmap;

m_d2dContext->CreateSharedBitmap(

__uuidof(IDXGISurface2),

surface.Get(),

&bp,

&bitmap

);

Answer 2

Thanks, I'll try it.