source: downloads/Samples/Media/materials/scripts/DOF.material @ 5

fragment_program DOF_Blur_ps cg
{
        source DOF_ps.cg
        entry_point blur
        profiles ps_2_0 arbfp1
}

fragment_program DOF_Blend_ps cg
{
        source DOF_ps.cg
        entry_point blend
        profiles ps_2_0 arbfp1
}

//Effect: Depth of Field
material Ogre/Compositor/DOF_Blur0
{
        technique
        {
                //Rendering Pass: Blur0 (pass index: #1 )
                pass
                {
                        //State: D3DRS_CULLMODE, Value : D3DCULL_NONE
                        cull_hardware none
                        cull_software none
                        depth_check off

                        fragment_program_ref DOF_Blur_ps
                        {
                            param_named sampleDistance float 0.1
                        }
                        vertex_program_ref Ogre/Compositor/StdQuad_Tex2a_vp
                        {
                        }
                        texture_unit
                        {
                            // texture will get added at runtime
                tex_coord_set 0
                                tex_address_mode wrap
                                filtering trilinear
                        }
                }
        }
}

// cheat here by copying from DOF_Blur0
material Ogre/Compositor/DOF_Blur1 : Ogre/Compositor/DOF_Blur0
{
        technique
        {
                //Rendering Pass: Blur0 (pass index: #1 )
                pass
                {
                    // use the same pixel shader as DOF_Blur0
                        fragment_program_ref
                        {
                            // override value from copied DOF_Blur0 material
                            param_named sampleDistance float 0.1
                        }
                }
        }
}

material Ogre/Compositor/DOF_Blend
{
    technique
    {
        pass
        {
                        fragment_program_ref DOF_Blend_ps
                        {
                            param_named focus float 0.66
                            param_named range float 1.0
                        }
                        vertex_program_ref Ogre/Compositor/StdQuad_Tex2a_vp
                        {
                        }
            texture_unit Blur0
            {
                            // texture will get added at runtime
                tex_coord_set 0
                                tex_address_mode clamp
                                filtering trilinear
            }
            texture_unit Blur1
            {
                            // texture will get added at runtime
                tex_coord_set 0
                                tex_address_mode clamp
                                filtering trilinear
            }
        }
    }
}