#******************************************
#ZONE SYSTEM
#******************************************

#@gimp Zone system: gimp_zonesystem, gimp_zonesystem_preview(1)
#@gimp : Shadows zone = int(1,1,5)
#@gimp : Highlights zone = int(10,6,10)
#@gimp : Gamma = float(1,0,5)
#@gimp : Contrast = float(1,0,4)
#@gimp : Black point = int(0,0,255)
#@gimp : White point = int(255,0,255)
#@gimp : sep = separator(), Preview type = choice("Full","Forward horizontal","Forward vertical","Backward horizontal","Backward vertical")
#@gimp : sep = separator(), note = note("<small>Author : <i>Tom Keil</i>.      Last update : <i>2011/02/13</i>.</small>")

 gimp_zonesystem :

 -repeat @# -l[$>] -to_rgb -rgb2lab -s c -n[0] {{$1-1}*10}%,{$2*10}%
 -a c -lab2rgb -gimp_channel_processing $3,$4,0,0,0,0,100,256,0,0,0,2,7,0
 -gimp_apply_curve 0,$5,0,$6,255,-1,128,-1,128,-1,128,255,1,7,0,0,0
 -endl -done

 gimp_zonesystem_preview :
  -gimp_split_preview "-gimp_zonesystem ${1--2}",$-1

#******************************************
#END OF FILTER
#******************************************