rainbowstream/c_image.py

   1 from PIL import Image
   2 from os.path import join, dirname, getmtime, exists, expanduser
   3 from .config import *
   4
   5 import ctypes
   6 import sys
   7 import os
   8
   9
  10 def call_c():
  11     library = expanduser('~/.image.so')
  12     sauce = join(dirname(__file__), 'image.c')
  13     if not exists(library) or getmtime(sauce) > getmtime(library):
  14         build = "gcc -fPIC -shared -o %s %s" % (library, sauce)
  15         assert os.system(build + " >/dev/null 2>&1") == 0
  16     image_c = ctypes.cdll.LoadLibrary(library)
  17     image_c.init()
  18     return image_c.rgb_to_ansi
  19
  20 rgb2short = call_c()
  21
  22
  23 def pixel_print(ansicolor):
  24     sys.stdout.write('\033[48;5;%sm \033[0m' % (ansicolor))
  25
  26
  27 def image_to_display(path, start=None, length=None):
  28     rows, columns = os.popen('stty size', 'r').read().split()
  29     if not start:
  30         start = c['IMAGE_SHIFT']
  31     if not length:
  32         length = int(columns) - 2 * start
  33     i = Image.open(path)
  34     i = i.convert('RGBA')
  35     w, h = i.size
  36     i.load()
  37     width = min(w, length)
  38     height = int(float(h) * (float(width) / float(w)))
  39     height //= 2
  40     i = i.resize((width, height), Image.ANTIALIAS)
  41     height = min(height, c['IMAGE_MAX_HEIGHT'])
  42
  43     for y in range(height):
  44         sys.stdout.write(' ' * start)
  45         for x in range(width):
  46             p = i.getpixel((x, y))
  47             r, g, b = p[:3]
  48             pixel_print(rgb2short(r, g, b))
  49         sys.stdout.write('\n')
  50
  51 if __name__ == '__main__':
  52     image_to_display(sys.argv[1])