; DoF pixel shader
ps.1.1

/*
 c0.a		focus depth
 c1.a		focus width
 c3.a		bloom
*/
def c2, 0.5, 0.5, 0.5, 0.5
def c3, 0.0, 0.0, 0.0, 0.1

tex t0							// blurred texture
tex t2							// in-focus texture
tex t3							// depth map

add_x2 r0, -t3, c0		// r0 = depth of field
mad r0, r0, r0, c1	// r0 = depth of field^2 + bias


dp3_d2 r1, t0, t0	// compute blurred 2*brightness
sub_d2 r1.a, r1.a, c3.a

add_d2 r1.rgb, t0, t0		// average blurred samples
lrp r0.rgb, r0, r1, t2		// lerp between blurred & sharp texture

mad r0, r1_sat.a, r1.rgb, r0		// add bloom