public void SetParameter(int width, int height, int samples)
{
if (glFramebufferParameteri == null) { throw new Exception(string.Format("{0} is not supported on this device!", glFramebufferParameteri)); }
//if (glFramebufferParameteri != null)
{
glFramebufferParameteri(OpenGL.GL_DRAW_FRAMEBUFFER, OpenGL.GL_FRAMEBUFFER_DEFAULT_WIDTH, width);//512
glFramebufferParameteri(OpenGL.GL_DRAW_FRAMEBUFFER, OpenGL.GL_FRAMEBUFFER_DEFAULT_HEIGHT, height);//512
glFramebufferParameteri(OpenGL.GL_DRAW_FRAMEBUFFER, OpenGL.GL_FRAMEBUFFER_DEFAULT_SAMPLES, samples);//4
}
}