set cut_paste_input [stack 0]
push $cut_paste_input
Group {
 name Tonemap_ToeLast
 addUserKnob {20 Tonemap}
 addUserKnob {35 presets l " " M {"presets/SDR - Dark" "knobs this \{Lp \{Lw\} Lw 100 Lg 11.5 c 1.4 ps 1 t0 0.01\}" "presets/SDR - Dim" "knobs this \{Lp \{Lw\} Lw 100 Lg 11.5 c 1.4 ps .95 t0 0.01\}" "presets/SDR - Average" "knobs this \{Lp \{Lw\} Lw 100 Lg 11.5 c 1.4 ps .9 t0 0.01\}" "presets/Rec.2100 PQ ST-2084 600 nit" "knobs this \{Lp 10000 Lw 600 Lg 14 c 1.2 ps 1 t0 0.001\}" "presets/Rec.2100 PQ ST-2084 1000 nit" "knobs this \{Lp 10000 Lw 1000 Lg 14 c 1.2 ps 1 t0 0.0001\}" "presets/Rec.2100 PQ ST-2084 2000 nit" "knobs this \{Lp 10000 Lw 2000 Lg 14 c 1.2 ps 1 t0 0.0001\}" "presets/Rec.2100 PQ ST-2084 4000 nit" "knobs this \{Lp 10000 Lw 4000 Lg 14 c 1.2 ps 1 t0 0.0001\}"}}
 addUserKnob {7 Lp t "Peak luminance in nits" R 48 10000}
 Lp {{Lw}}
 addUserKnob {7 Lw t "Normalized white luminance in nits" R 48 4000}
 Lw 100
 addUserKnob {7 Lg t "Grey luminance in nits." R 4 20}
 Lg 11.5
 addUserKnob {7 c l contrast R 0.8 2}
 c 1.4
 addUserKnob {7 ps l surround t "surround compensation: unconstrained power function" R 0.8 1.2}
 ps 0.9
 addUserKnob {7 t0 l toe R 0 0.1}
 t0 0.01
 addUserKnob {26 ""}
 addUserKnob {7 p t "power (combination of grey-constrained contrast and unconstrained surround compensation)" R 0.5 4}
 p {{c*ps}}
 addUserKnob {78 g l grey t "input -> output grey" n 2}
 g {0.18 {Lg/Lp}}
 addUserKnob {7 w t "input exposure" R 0 100}
 w {{-pow(g.1/s.1,1/c)/(g.0*(pow(g.1/s.1,1/c)-1))}}
 addUserKnob {7 h R 1 2}
 h {{0.048*Lw/1000+1.037}}
 addUserKnob {78 s l scale n 2}
 s {{w*max(1,pow(Lw/1000,0.1))} {Lw/Lp*h}}
 addUserKnob {4 direction M {forward inverse}}
 addUserKnob {26 ""}
 addUserKnob {26 plot_label l " " T "<style>a:link \{color:#ccc\}</style><a href=\"https://www.desmos.com/calculator/7qvuixbzht\">desmos plot</a>"}
}
 Input {
  inputs 0
  name Input
  xpos -40
  ypos -70
 }
 Dot {
  name Dot1
  note_font "Helvetica Bold"
  note_font_size 24
  note_font_color 0xff
  xpos -6
  ypos -6
 }
set N9a6649d0 [stack 0]
 Expression {
  expr0 r/s.1
  expr1 g/s.1
  expr2 b/s.1
  name InvOutputScale
  note_font Helvetica
  xpos 70
  ypos 21
 }
 Expression {
  temp_name0 rt
  temp_expr0 pow(0.5*(r+sqrt(r*(4*t0+r))),1/p)
  temp_name1 gt
  temp_expr1 pow(0.5*(g+sqrt(g*(4*t0+g))),1/p)
  temp_name2 bt
  temp_expr2 pow(0.5*(b+sqrt(b*(4*t0+b))),1/p)
  expr0 rt/(1-rt)
  expr1 gt/(1-gt)
  expr2 bt/(1-bt)
  name InvCompress
  note_font Helvetica
  xpos 70
  ypos 51
 }
 Expression {
  expr0 r/s.0
  expr1 g/s.0
  expr2 b/s.0
  name InputScale1
  note_font Helvetica
  xpos 70
  ypos 81
 }
push $N9a6649d0
 Expression {
  expr0 r*s.0
  expr1 g*s.0
  expr2 b*s.0
  name InputScale
  note_font Helvetica
  xpos -150
  ypos 21
 }
 Expression {
  temp_name0 rt
  temp_expr0 pow(r/(r+1),p)
  temp_name1 gt
  temp_expr1 pow(g/(g+1),p)
  temp_name2 bt
  temp_expr2 pow(b/(b+1),p)
  expr0 (rt*rt)/(rt+t0)
  expr1 (gt*gt)/(gt+t0)
  expr2 (bt*bt)/(bt+t0)
  name Compression
  note_font Helvetica
  xpos -150
  ypos 51
 }
 Expression {
  expr0 r*s.1
  expr1 g*s.1
  expr2 b*s.1
  name OutputScale
  note_font Helvetica
  selected true
  xpos -150
  ypos 81
 }
 Switch {
  inputs 2
  which {{parent.direction}}
  name SwitchDirection
  note_font Helvetica
  xpos -40
  ypos 141
 }
 Output {
  name Output
  xpos -40
  ypos 200
 }
end_group