264   D3D11_TEXTURE2D_DESC map_desc;  in CreateMappedTexture()  local
265   map_desc.Width = width == 0 ? src_desc.Width : width;  in CreateMappedTexture()
266   map_desc.Height = height == 0 ? src_desc.Height : height;  in CreateMappedTexture()
267   map_desc.MipLevels = src_desc.MipLevels;  in CreateMappedTexture()
268   map_desc.ArraySize = src_desc.ArraySize;  in CreateMappedTexture()
269   map_desc.Format = src_desc.Format;  in CreateMappedTexture()
270   map_desc.SampleDesc = src_desc.SampleDesc;  in CreateMappedTexture()
271   map_desc.Usage = D3D11_USAGE_STAGING;  in CreateMappedTexture()
272   map_desc.BindFlags = 0;  in CreateMappedTexture()
273   map_desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;  in CreateMappedTexture()
274   map_desc.MiscFlags = 0;  in CreateMappedTexture()
275   return d3d11_device_->CreateTexture2D(&map_desc, nullptr, mapped_texture_.put());  in CreateMappedTexture()