Tonemap Filmic - Implementing John Hable's Filmic Tonemapping algorithm as a Nuke gizmo.

TonemapFilmic.nk

Group {
 name TonemapFilmic
 help "Implementing John Hable's Filmic Tonemapping algorithm as a Nuke gizmo.\n\nhttp://filmicgames.com/archives/75\nhttp://www.slideshare.net/ozlael/hable-john-uncharted2-hdr-lighting\n\n## Filmic Tonemapping\nA = Shoulder Strength\nB = Linear Strength\nC = Linear Angle\nD = Toe Strength\nE = Toe Numerator\nF = Toe Denominator\n\tNote: E/F = Toe Angle\nLinearWhite = Linear White Point Value\n\nF(x) = ((x*(A*x+C*B) + D*E) / (x*(A*x+B) + D*F)) - E/F\nFinalColor = F(LinearColor)/F(LinearWhite)\n\nA = 0.22\nB = 0.30\nC = 0.10\nD = 0.20\nE = 0.01\nF = 0.30\nLinearWhite = 11.2\nThese numbers are assuming linear source data."
 addUserKnob {20 Tonamap l Tonemap}
 addUserKnob {26 ""}
 addUserKnob {7 exposure t "Adjust the exposure before the tonemap in stops." R -4 4}
 addUserKnob {41 shStr l "Shoulder Strength" T Expression_Filmic_Tonemap.shStr}
 addUserKnob {41 linStr l "Linear Strength" T Expression_Filmic_Tonemap.linStr}
 addUserKnob {41 linAngle l "Linear Angle" T Expression_Filmic_Tonemap.linAngle}
 addUserKnob {41 toeStr l "Toe Strength" T Expression_Filmic_Tonemap.toeStr}
 addUserKnob {41 toeNum l "Toe Numerator" T Expression_Filmic_Tonemap.toeNum}
 addUserKnob {41 toeDenom l "Toe Denominator" T Expression_Filmic_Tonemap.toeDenom}
 addUserKnob {41 linWhite l "Linear White" T Expression_Filmic_Tonemap.linWhite}
 addUserKnob {26 ""}
 addUserKnob {41 use_mask_input l "mask input" T NodeWrapper.use_mask_input}
 addUserKnob {41 maskChannelMask l "" -STARTLINE T Expression_Filmic_Tonemap.maskChannelMask}
 addUserKnob {41 maskChannelInput l " input" -STARTLINE T Expression_Filmic_Tonemap.maskChannelInput}
 addUserKnob {41 inject T Expression_Filmic_Tonemap.inject}
 addUserKnob {41 invert_mask l invert -STARTLINE T Expression_Filmic_Tonemap.invert_mask}
 addUserKnob {41 fringe -STARTLINE T Expression_Filmic_Tonemap.fringe}
 addUserKnob {41 unpremult l "(un)premult by" T Expression_Filmic_Tonemap.unpremult}
 addUserKnob {41 invert_unpremult l invert -STARTLINE T Expression_Filmic_Tonemap.invert_unpremult}
 addUserKnob {41 which l mix T NodeWrapper.which}
}
 Input {
  inputs 0
  name Input
  xpos -370
  ypos -561
 }
 Dot {
  name Dot1
  note_font_size 42
  note_font_color 0x7f7f7f01
  xpos -336
  ypos -342
 }
set Nfc0aeac0 [stack 0]
 Multiply {
  channels rgba
  value {{"pow(2, parent.exposure)"}}
  maskChannelMask {{{parent.Expression_Filmic_Tonemap.maskChannelMask}}}
  inject {{parent.Expression_Filmic_Tonemap.inject}}
  invert_mask {{parent.Expression_Filmic_Tonemap.invert_mask}}
  fringe {{parent.Expression_Filmic_Tonemap.fringe}}
  unpremult {{{parent.Expression_Filmic_Tonemap.unpremult}}}
  invert_unpremult {{parent.Expression_Filmic_Tonemap.invert_unpremult}}
  mix {{parent.Expression_Filmic_Tonemap.mix}}
  name Exposure
  xpos -370
  ypos -177
 }
 Expression {
  expr0 "((r*(shStr*r+linAngle*linStr) + toeStr*toeNum) / (r*(shStr*r+linStr)+toeStr*toeDenom) - toeNum/toeDenom)/linWhiteMult"
  expr1 "((g*(shStr*g+linAngle*linStr) + toeStr*toeNum) / (g*(shStr*g+linStr)+toeStr*toeDenom) - toeNum/toeDenom)/linWhiteMult"
  expr2 "((b*(shStr*b+linAngle*linStr) + toeStr*toeNum) / (b*(shStr*b+linStr)+toeStr*toeDenom) - toeNum/toeDenom)/linWhiteMult"
  name Expression_Filmic_Tonemap
  selected true
  xpos -370
  ypos -133
  addUserKnob {20 User}
  addUserKnob {7 shStr l "Shoulder Strength"}
  shStr 0.305
  addUserKnob {7 linStr l "Linear Strength"}
  linStr 0.055
  addUserKnob {7 linAngle l "Linear Angle"}
  linAngle 0.49
  addUserKnob {7 toeStr l "Toe Strength"}
  toeStr 0.225
  addUserKnob {7 toeNum l "Toe Numerator"}
  toeNum 0.04
  addUserKnob {7 toeDenom l "Toe Denominator"}
  toeDenom 0.22
  addUserKnob {7 linWhite l "Linear White" R 0 50}
  linWhite 11.2
  addUserKnob {7 linWhiteMult R 0 12}
  linWhiteMult {{"((linWhite*(shStr*linWhite+linAngle*linStr) + toeStr*toeNum) / (linWhite*(shStr*linWhite+linStr)+toeStr*toeDenom) - toeNum/toeDenom)"}}
 }
 Dot {
  name Dot4
  note_font_size 42
  note_font_color 0x7f7f7f01
  xpos -336
  ypos -6
 }
push $Nfc0aeac0
 Dot {
  name Dot3
  note_font_size 42
  note_font_color 0x7f7f7f01
  xpos -116
  ypos -342
 }
 Dissolve {
  inputs 2
  channels rgba
  which 1
  fringe true
  name NodeWrapper
  knobChanged "n = nuke.thisNode()\nk = nuke.thisKnob()\n\nif k.name() == 'use_mask_input':\n    mask_input_name = 'InputMask'\n    pn = nuke.toNode('.'.join(n.fullName().split('.')\[:-1]))\n    pn.setInput(1, None)\n    mask_input = nuke.toNode(mask_input_name)\n    masknodes = \['Expression_Filmic_Tonemap', 'Exposure']\n    if not k.value():\n        nuke.delete(mask_input)\n    else:\n        mask_input = nuke.nodes.Input()\n        mask_input\['name'].setValue('InputMask')\n        mask_input.setXpos( 0 )\n        mask_input.setYpos( 0 )\n        for mn in masknodes:\n            nuke.toNode(mn).setInput(1, mask_input)\n"
  xpos -150
  ypos -9
  addUserKnob {20 User}
  addUserKnob {6 use_mask_input +STARTLINE}
 }
 Output {
  name Output1
  xpos -150
  ypos 120
 }
end_group