'''ReduceAll.py

Reduce all .JPG images in the specified folder by a factor of SCALE.
Normally SCALE = 0.25

'''

SCALE = 0.25
SFACTOR = 1.0/SCALE

def list_JPGs(folder):
  import os
  files = os.listdir(folder)
  return filter(lambda f: f[-4:]==".JPG", files)

image_files = list_JPGs("Still-Life")

def reduce_image(folder, filename):
  print "Preparing to reduce the image: "+folder+"/"+filename
  pmOpenImage(1, folder+"/"+filename)
  width = pmGetImageWidth(1)
  height = pmGetImageHeight(1)
  w1 = int(SCALE*width)
  h1 = int(SCALE*height)
  pmSetSource1(1)
  newWin = pmNewImage(2, "Reduced version of "+filename, w1, h1, 255, 0, 0)
  pmSetDestination(newWin)
  pmSetFormula("S1("+str(SFACTOR)+"*x,"+str(SFACTOR)+"*y)")
  pmCompute()
  pmSaveImageAs(newWin, folder+"/Reduced-"+filename)

for fn in image_files:
  reduce_image("Still-Life", fn)