Stopped images having their height halved when using blocky printing
[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 from .py3patch import *
5
6 import ctypes
7 import sys
8 import os
9
10
11 def call_c():
12 """
13 Call the C program for converting RGB to Ansi colors
14 """
15 library = expanduser('~/.image.so')
16 sauce = join(dirname(__file__), 'image.c')
17 if not exists(library) or getmtime(sauce) > getmtime(library):
18 build = "cc -fPIC -shared -o %s %s" % (library, sauce)
19 os.system(build + " >/dev/null 2>&1")
20 image_c = ctypes.cdll.LoadLibrary(library)
21 image_c.init()
22 return image_c.rgb_to_ansi
23
24 rgb2short = call_c()
25
26
27 def pixel_print(ansicolor):
28 """
29 Print a pixel with given Ansi color
30 """
31 sys.stdout.write('\033[48;5;%sm \033[0m' % (ansicolor))
32
33
34 def block_print(lower, higher):
35 """
36 Print two pixels arranged above each other with Ansi color.
37 Abuses Unicode to print two pixels in the space of one terminal block.
38 """
39 sys.stdout.write('\033[38;5;%sm\033[48;5;%smâ–„\033[0m' % (higher, lower))
40
41
42 def image_to_display(path, start=None, length=None):
43 """
44 Display an image
45 """
46 rows, columns = os.popen('stty size', 'r').read().split()
47 if not start:
48 start = c['IMAGE_SHIFT']
49 if not length:
50 length = int(columns) - 2 * start
51 i = Image.open(path)
52 i = i.convert('RGBA')
53 w, h = i.size
54 i.load()
55 width = min(w, length)
56 height = int(float(h) * (float(width) / float(w)))
57 i = i.resize((width, height), Image.ANTIALIAS)
58 height = min(height, c['IMAGE_MAX_HEIGHT'])
59
60 for real_y in xrange(height // 2):
61 sys.stdout.write(' ' * start)
62 for x in xrange(width):
63 y = real_y * 2
64 p0 = i.getpixel((x, y))
65 p1 = i.getpixel((x, y+1))
66 r0, g0, b0 = p0[:3]
67 r1, g1, b1 = p1[:3]
68 block_print(rgb2short(r0, g0, b0), rgb2short(r1, g1, b1))
69 sys.stdout.write('\n')
70
71
72 """
73 For direct using purpose
74 """
75 if __name__ == '__main__':
76 image_to_display(sys.argv[1])