winapi.rs texture issues

texture_issues.rs

// Texture creation
let mut texture: *mut ID3D11Texture2D = null_mut();
let mut texture_desc: D3D11_TEXTURE2D_DESC = std::mem::zeroed();
texture_desc.Width = width; // usually 1280
texture_desc.Height = height; // usually 720
texture_desc.MipLevels = 1;
texture_desc.ArraySize = 1;
texture_desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
texture_desc.SampleDesc.Count = 1;
texture_desc.Usage = D3D11_USAGE_DYNAMIC;
texture_desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
texture_desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;

// device is ID3D11Device
device.CreateTexture2D(&texture_desc, null_mut(), &mut texture);

// Texture update
let mut texture_mapped_res: D3D11_MAPPED_SUBRESOURCE  = std::mem::zeroed();
let res = device_context.Map(self.texture as *mut _, 0, D3D11_MAP_WRITE, 0, &mut texture_mapped_res);

if texture_mapped_res.pData.is_null() {
    error!("Mapping unsuccesfful pData is null");
}

// copy src -> pData

device_context.Unmap(self.texture as *mut _, 0);