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c_image.py
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c_image.py
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# -*- coding: utf-8 -*-
from PIL import Image
from os.path import join, dirname, getmtime, exists, expanduser
from .config import *
from .py3patch import *
import ctypes
import sys
import os
def call_c():
"""
Call the C program for converting RGB to Ansi colors
"""
library = expanduser('~/.image.so')
sauce = join(dirname(__file__), 'image.c')
if not exists(library) or getmtime(sauce) > getmtime(library):
build = "cc -fPIC -shared -o %s %s" % (library, sauce)
os.system(build + " >/dev/null 2>&1")
image_c = ctypes.cdll.LoadLibrary(library)
image_c.init()
return image_c.rgb_to_ansi
rgb2short = call_c()
def pixel_print(pixel):
"""
Print a pixel with given Ansi color
"""
r, g, b = pixel[:3]
if c['24BIT'] is True:
sys.stdout.write('\033[48;2;%d;%d;%dm \033[0m'
% (r, g, b))
else:
ansicolor = rgb2short(r, g, b)
sys.stdout.write('\033[48;5;%sm \033[0m' % (ansicolor))
def block_print(higher, lower):
"""
Print two pixels arranged above each other with Ansi color.
Abuses Unicode to print two pixels in the space of one terminal block.
"""
r0, g0, b0 = lower[:3]
r1, g1, b1 = higher[:3]
if c['24BIT'] is True:
sys.stdout.write('\033[38;2;%d;%d;%dm\033[48;2;%d;%d;%dm▄\033[0m'
% (r1, g1, b1, r0, g0, b0))
else:
i0 = rgb2short(r0, g0, b0)
i1 = rgb2short(r1, g1, b1)
sys.stdout.write('\033[38;5;%sm\033[48;5;%sm▄\033[0m' % (i1, i0))
def image_to_display(path, start=None, length=None):
"""
Display an image
"""
rows, columns = os.popen('stty size', 'r').read().split()
if not start:
start = c['IMAGE_SHIFT']
if not length:
length = int(columns) - 2 * start
i = Image.open(path)
i = i.convert('RGBA')
w, h = i.size
i.load()
width = min(w, length)
height = int(float(h) * (float(width) / float(w)))
if c['IMAGE_RESIZE_TO_FIT'] is True:
# If it image won't fit in the terminal without scrolling shrink it
# Subtract 3 from rows so the tweet message fits in too.
h = 2 * (int(rows) - 3)
if height >= h:
width = int(float(width) * (float(h) / float(height)))
height = h
if (height <= 0) or (width <= 0):
raise ValueError("image has negative dimensions")
height = min(height, c['IMAGE_MAX_HEIGHT'])
# Sixel
if c['IMAGE_ON_TERM'] == 'sixel':
import fcntl, struct, termios
from io import BytesIO
from libsixel import sixel_dither_new, sixel_dither_initialize, sixel_encode, sixel_output_new, SIXEL_PIXELFORMAT_RGBA8888
from resizeimage import resizeimage
# FIXME: rows and columns are gotten a second time. Maybe use this at
# the begining of function instead of the call to stty size
farg = struct.pack("HHHH", 0, 0, 0, 0)
fd_stdout = sys.stdout.fileno()
fretint = fcntl.ioctl(fd_stdout, termios.TIOCGWINSZ, farg)
rows, columns, xpixels, ypixels = struct.unpack("HHHH", fretint)
max_width_pixels = width * (xpixels // columns)
max_height_pixels = height * (ypixels // rows)
# FIXME: This way is preferable to avoid an addition dependency, but it doesn't work correctly
# i = i.resize((max_width_pixels, max_height_pixels), Image.ANTIALIAS)
i = resizeimage.resize_thumbnail(i, [max_width_pixels, max_height_pixels])
sixel = BytesIO()
dither = sixel_dither_new(256)
sixel_dither_initialize(dither, i.tobytes(), i.width, i.height, SIXEL_PIXELFORMAT_RGBA8888)
sixel_encode(i.tobytes(), i.width, i.height, 1, dither,
sixel_output_new(lambda imgdata, sixel: sixel.write(imgdata), sixel))
sys.stdout.write('%s%s' % (' ' * start, sixel.getvalue().decode('ascii')))
# SGR
else:
i = i.resize((width, height), Image.ANTIALIAS)
for real_y in xrange(height // 2):
sys.stdout.write(' ' * start)
for x in xrange(width):
y = real_y * 2
p0 = i.getpixel((x, y))
p1 = i.getpixel((x, y + 1))
block_print(p1, p0)
sys.stdout.write('\n')
"""
For direct using purpose
"""
if __name__ == '__main__':
image_to_display(sys.argv[1])