wglCreateContextAttribsARB INVALID_OPERATION

OpenGL OpenGL: Basic Coding
1

Finally I’ve called wglCreateContextAttribsARB, but glGetError returns me INVALID_OPERATION. Anyone knowns why?



int[] mContextAttrib = new int[] {
  Wgl.WGL_CONTEXT_MAJOR_VERSION_ARB,3,
  Wgl.WGL_CONTEXT_MINOR_VERSION_ARB,2,
  Wgl.WGL_CONTEXT_PROFILE_MASK_ARB, (int)(Wgl.WGL_CONTEXT_CORE_PROFILE_BIT_ARB),
  Wgl.WGL_CONTEXT_FLAGS_ARB, (int)(Wgl.WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB),
  0
};

// Store device context handle
mDeviceContext = devctx;

// Create rendering context
if ((mRenderContext = Wgl.CreateContextAttrib(mDeviceContext, IntPtr.Zero, mContextAttrib)) == IntPtr.Zero)
  throw new Exception("unable to create context");
Debug.Assert(RenderContext.CheckErrors() == true);

CheckErrors calls glGetError, which returns the error code. Every entry point is obtained using wglGetProcAddress…

I’ve the lastest NV driver, and OpenGL implementation version is 3.2.0…

2

glGetError returns INVALID OPERATION untill I make current the context.

Then it works perfectly.