public void bindFramebuffer(int target, WebGLFramebuffer framebuffer)
        {
            var bufferId = (int)(framebuffer != null ? framebuffer.Value : 0);

#if _DEBUG
            Log.Info(string.Format("bindFramebuffer {0} {1}", target, bufferId));
#endif

#if GLEW_STATIC
            Gl.glBindFramebuffer(target, bufferId);
#else
            Gl.__glewBindFramebuffer(target, bufferId);
#endif
            this.ErrorTest();
        }