#@gmic stack : _sciezka_plikow_wej,_liczba_cyfr,_poczatkowy_numer,_liczba_plikow, _dopuszczalna_roznica,_skalowanie_x=0,_skalowanie_przed_wyznaczeniem_roznicy=0
#@gmic : stackowanie obrazow z pominieciem obszarow ktorych niektore klatki nie obejmuja
#@gmic : przykladowe wywolanie: -stack ksiezyc-puste-avg.tif,outframes/LICZBA.png,8,8000,5000,1000000
stack:

darkname=$1
src_path=$2
src_digits=$3
src_first=$4
count=$5
maxdiff=$6
resizex=${7=0}
diffresizex=${8=0}

-i outframes/00012963.png -name[-1] target
-i $darkname -name[-1] dark
-if {$resizex>0} -resize2dx[target,dark] $resizex,3 -endif
-mul[dark] -1
-add[dark] {-@{dark,m}}
-add[target] [dark]
-i @{target,w},@{target,h},1,1,1 -name[-1] pixcount
--keep[target] -name[-1] accum

-repeat {$count}
  #-if {u>0.001} -continue -endif

  srcfile=@{-strreplace\ $src_path,"LICZBA",@{-padint\ {$src_first+$>},$src_digits}}

  -i $srcfile -name[-1] incoming
  -if {$resizex>0} -resize2dx[incoming] $resizex,3 -endif
  -add[incoming] [dark]

  --cross_correlation[target,incoming] -name[-1] corr
  maxinfo=@{corr,C}
  maxx=@{-arg\ 1,$maxinfo}
  maxy=@{-arg\ 2,$maxinfo}
  -if {$maxx>@{corr,w}/2} maxx={$maxx-@{corr,w}} -endif
  -if {$maxy>@{corr,h}/2} maxy={$maxy-@{corr,h}} -endif
  -remove[corr]
  --shift[incoming] {$maxx},{$maxy},0,0,2  -name[-1] cycshift  # shifted/cyclic for diff
  -shift[incoming] {$maxx},{$maxy}                             # shifted/crop for accumulation
  --sub[cycshift,target] -name[-1] diff
  -if {$diffresizex>0} -resize2dx[diff] $diffresizex,3 -endif
  -abs[diff] 
  diff=@{diff,+}
  -remove[cycshift,diff]
  -echo "maxx="$maxx" maxy="$maxy" diff="$diff
  -if {$diff<$maxdiff}
    -add[accum] [incoming]
    -i @{accum,w},@{accum,h},1,1,1 -name[-1] mask
    -shift[mask] {$maxx},{$maxy}
    -add[pixcount] [mask]
    -remove[mask]
  -endif
  -echo xxxx
  -remove[incoming]

-done

-div[accum] [pixcount]