demos/py_simple/dither.py

   1 #!/usr/bin/env python
   2 import sys
   3
   4 import gfxprim.core as core
   5 import gfxprim.loaders as loaders
   6 import gfxprim.filters as filters
   7
   8 def main():
   9     if len(sys.argv) != 2:
  10         print("usage: dither.py image")
  11         sys.exit(1)
  12
  13     # Load Image
  14     img = loaders.LoadImage(sys.argv[1], None)
  15     # Use Floyd-Steinberg dithering
  16     res = filters.FilterFloydSteinberg_RGB888_Alloc(img, core.C.PIXEL_G1, None)
  17     # Save result into grayscale png
  18     loaders.SavePNG(res, "out.png", None)
  19
  20 if __name__ == '__main__':
  21     main()