fix image IOError
[rainbowstream.git] / 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 xrange(height):
44 print ' ' * start,
45 for x in xrange(width):
46 p = i.getpixel((x, y))
47 r, g, b = p[:3]
48 pixel_print(rgb2short(r, g, b))
49 print ''
50
51 if __name__ == '__main__':
52 image_to_display(sys.argv[1])