;------------------------------------------------------------------------------
; FocusBlur by choosing a range of z values and using that to select
; a blurred version of the original image.
; 
; Copyright (C) 2001 Microsoft Corporation
; All rights reserved.
;------------------------------------------------------------------------------
xps.1.1

def c0, 0.5f, 0.5f, 0.5f, 0.5f		; blur value

; source textures
tex t0				; z-buffer texture
texreg2ar t1, t0	; lookup-table texture to choose what range of depth to use
tex t2				; pre-blurred texture, first offset
tex t3				; pre-blurred texture, second offset

; blur pre-blurred texture even more
lrp r0, c0, t2, t3

; modulate by depth range
xfc r0_sat, 1-t1.a, zero, zero, zero, zero, 1-t1.a