set cut_paste_input [stack 0]
push $cut_paste_input
Group {
 name Tonemap_Lottes
 addUserKnob {20 Tonemap_Lottes_tab l Tonemap_Lottes}
 addUserKnob {7 hdrmax R 1 50}
 hdrmax 16
 addUserKnob {7 midin}
 midin 0.18
 addUserKnob {7 midout}
 midout 0.1
 addUserKnob {7 ca l toe t "Sets toe of curve" R 0.5 2.5}
 ca 1.6
 addUserKnob {7 cd l shoulder t "Adjusts compression speed in the shoulder region of the curve" R 0.8 1}
 cd 1
 addUserKnob {7 cb t "Sets clipping point \nSets peak of input dynamic range"}
 cb {{(-pow(midin,ca)+pow(hdrmax,ca)*midout)/((pow(hdrmax,ca*cd)-pow(midin,ca*cd))*midout)}}
 addUserKnob {7 cc t "Speed of compression"}
 cc {{(pow(hdrmax,ca*cd)*pow(midin,ca)-pow(hdrmax,ca)*pow(midin,ca*cd)*midout)/((pow(hdrmax,ca*cd)-pow(midin,ca*cd))*midout)}}
 addUserKnob {26 ""}
 addUserKnob {6 enable_crosstalk l "enable path to white above dispay maximum" t "Enable gamut volume compression above display luminance threshold" +STARTLINE}
 enable_crosstalk true
 addUserKnob {18 crosstalk t "Controls amount of channel crosstalk in path to white" R 0 8}
 crosstalk {16 16 16}
 addUserKnob {6 crosstalk_panelDropped l "panel dropped state" -STARTLINE +HIDDEN}
 addUserKnob {18 saturation t "Full tonal range saturation control" R 1 2}
 saturation {1 1 1}
 addUserKnob {6 saturation_panelDropped l "panel dropped state" -STARTLINE +HIDDEN}
 addUserKnob {18 satpower R 1 16}
 satpower {16 16 16}
 addUserKnob {6 satpower_panelDropped l "panel dropped state" -STARTLINE +HIDDEN}
 addUserKnob {18 white +INVISIBLE}
 white {1 1 1}
 addUserKnob {6 white_panelDropped l "panel dropped state" -STARTLINE +HIDDEN}
}
 Input {
  inputs 0
  name Input
  xpos -40
  ypos 254
 }
 Dot {
  name Dot2
  xpos -6
  ypos 306
 }
set N966b53d0 [stack 0]
 Expression {
  channel0 rgb
  expr0 max(r,g,b)
  channel1 none
  channel2 none
  channel3 none
  name Norm_MaxRGB
  note_font Helvetica
  xpos -40
  ypos 351
 }
set N8a0217e0 [stack 0]
 Expression {
  expr0 pow(r,ca)/(pow(r,ca*cd)*cb+cc)
  expr1 pow(g,ca)/(pow(g,ca*cd)*cb+cc)
  expr2 pow(b,ca)/(pow(b,ca*cd)*cb+cc)
  name Tonemap
  note_font Helvetica
  xpos -40
  ypos 399
 }
 Dot {
  name Dot1
  xpos -6
  ypos 450
 }
set N913919e0 [stack 0]
 Expression {
  channel0 {rgba.red -rgba.green -rgba.blue none}
  expr0 pow(r,crosstalk.r)
  expr1 pow(g,crosstalk.g)
  expr2 pow(b,crosstalk.b)
  name Factor
  note_font Helvetica
  xpos -139
  ypos 447
 }
push $N8a0217e0
push $N966b53d0
 Dot {
  name Dot3
  xpos -226
  ypos 306
 }
 MergeExpression {
  inputs 2
  expr0 Ar==0?0:Br/Ar
  expr1 Ag==0?0:Bg/Ag
  expr2 Ab==0?0:Bb/Ab
  name Ratio
  xpos -260
  ypos 350
 }
set N92069130 [stack 0]
 Expression {
  expr0 pow(fabs(r),saturation.r/(saturation.r*satpower.r))
  expr1 pow(fabs(g),saturation.g/(saturation.g*satpower.g))
  expr2 pow(fabs(b),saturation.b/(saturation.b*satpower.b))
  name Power
  note_font Helvetica
  xpos -260
  ypos 422
 }
 MergeExpression {
  inputs 2
  expr0 Br*(1-Ar)+white*Ar
  expr1 Bg*(1-Ag)+white*Ag
  expr2 Bb*(1-Ab)+white*Ab
  name Lerp
  xpos -260
  ypos 446
 }
 Clamp {
  channels rgba
  name Clamp1
  label "clamp 0-1"
  note_font Helvetica
  xpos -260
  ypos 478
 }
 Expression {
  expr0 pow(fabs(r),saturation.r*satpower.r)
  expr1 pow(fabs(g),saturation.g*satpower.g)
  expr2 pow(fabs(b),saturation.b*satpower.b)
  name InvPower
  note_font Helvetica
  xpos -260
  ypos 519
 }
push $N92069130
 Switch {
  inputs 2
  which {{enable_crosstalk}}
  name SwitchEnableCrosstalk
  note_font Helvetica
  xpos -150
  ypos 519
 }
push $N913919e0
 Merge2 {
  inputs 2
  operation multiply
  bbox B
  output rgb
  name Merge1
  note_font Helvetica
  xpos -40
  ypos 519
 }
 Output {
  name Output
  xpos -40
  ypos 590
 }
 StickyNote {
  inputs 0
  name StickyNote1
  tile_color 0x272727ff
  label "<left>\nTimothy Lottes 2016 Tonemap Operator\nhttp://32ipi028l5q82yhj72224m8j.wpengine.netdna-cdn.com/wp-content/uploads/2016/03/GdcVdrLottes.pdf\nhttps://github.com/KhronosGroup/glTF-Compressonator/blob/master/Compressonator/Applications/_Plugins/C3DModel_viewers/glTF_DX12_EX/DX12Util/shaders/Tonemapping.hlsl\n\nOutput is display-linear and needs an inverse EOTF applied"
  note_font Helvetica
  note_font_size 14
  note_font_color 0xa8a8a8ff
  xpos 243
  ypos 364
 }
end_group