private void deleteRenderBuffer(FrameBuffer fb, RenderBuffer rb) {
        intBuf1.put(0, rb.getId());
        glfbo.glDeleteRenderbuffersEXT(intBuf1);
    }
Copy the source buffer to the destination buffer, including both color
and depth.

@param src the source buffer (unaffected)
@param dst the destination buffer
jme3-core/src/main/java/com/jme3/renderer/opengl/GLRenderer.java