DirectX11. How to convert texture from one pixel format to another (RGBA -> BGRA)?

Question

DirectX

Good afternoon!
I'm new to DirectX, so I don't know a lot of things.
I have an RGBA (DXGI_FORMAT_R8G8B8A8_UNORM) texture in my graphics card memory. This is a captured game buffer.
Before copying its contents to the computer's memory, I need to convert this texture
to BGRA format (DXGI_FORMAT_B8G8R8A8_UNORM). How to convert a texture from one pixel format to another using a video card?

// DXGI_FORMAT_R8G8B8A8_UNORM
ID3D11Texture2D *pTexture1;

// DXGI_FORMAT_B8G8R8A8_UNORM
ID3D11Texture2D *pTexture2;

// 
// Копирование содержимого одной текстуры в другую с преобразованием пиксельного формата.
//
void pixelConvert(ID3D11Texture2D *pTexture1, ID3D11Texture2D *pTexture2)
{
  // 
  // Код реализации. Как сделать?
  //
}