pure python and c implement

[rainbowstream.git] / rainbowstream / c_image.py

from PIL import Image,ImageFilter
from functools import partial
from os.path import join, dirname, getmtime, exists, expanduser

import ctypes, sys, os

def call_c():
    library = expanduser('~/.image.so')
    sauce = join(dirname(__file__), 'image.c')
    if not exists(library) or getmtime(sauce) > getmtime(library):
        build = "gcc -fPIC -shared -o %s %s" % (library, sauce)
        assert os.system(build + " >/dev/null 2>&1") == 0
    image_c= ctypes.cdll.LoadLibrary(library)
    image_c.init()
    return image_c.rgb_to_ansi

rgb2short = call_c()
 
def pixel_print(ansicolor):
    sys.stdout.write('\033[48;5;%sm \033[0m' % (ansicolor))
  
def image_to_display(path):
    i = Image.open(path) 
    i = i.convert('RGBA')
    w,h = i.size
    i.load()
    rows, columns = os.popen('stty size', 'r').read().split()
    width = min(w, int(columns)-2*6)
    height = int(float(h) * (float(width) / float(w)))
    height //= 2
    i = i.resize((width, height), Image.BICUBIC)
    height = min(height,30)

    for y in xrange(height):
        print ' '*6 ,
        for x in xrange(width):
            p = i.getpixel((x,y))
            r, g, b = p[:3]
            pixel_print(rgb2short(r,g,b))
        print ''

if __name__ == '__main__':
    image_to_display(sys.argv[1])