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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# |
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# img2txt image to text converter |
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# Copyright (c) 2010 Alex Foulon <alxf@lavabit.com> |
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# |
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# This file is a Python port of "src/img2txt.c" |
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# which is: |
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# Copyright (c) 2006 Sam Hocevar <sam@hocevar.net> |
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# 2007 Jean-Yves Lamoureux <jylam@lnxscene.org> |
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# All Rights Reserverd |
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# |
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# This library is free software. It comes without any warranty, to |
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# the extent permitted by applicable law. You can redistribute it |
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# and/or modify it under the terms of the Do What The Fuck You Want |
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# To Public License, Version 2, as published by Sam Hocevar. See |
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# http://sam.zoy.org/wtfpl/COPYING for more details. |
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# |
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import getopt |
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import os |
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import sys |
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import caca |
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from caca.canvas import Canvas, CanvasError |
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from caca.dither import Dither, DitherError |
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RMASK = 0x00ff0000 |
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GMASK = 0x0000ff00 |
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BMASK = 0x000000ff |
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AMASK = 0x00000000 |
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BPP = 32 |
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DEPTH = 4 |
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HELP_MSG = """\ |
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Usage: %s [OPTIONS]... <IMAGE> |
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Convert IMAGE to any text based available format. |
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Example: %s -w 80 -f ansi ./caca.png |
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Options: |
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-h, --help This help |
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-v, --version Version of the program |
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-W, --width=WIDTH Width of resulting image |
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-H, --height=HEIGHT Height of resulting image |
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-x, --font-width=WIDTH Width of output font |
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-y, --font-height=HEIGHT Height of output font |
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-b, --brightness=BRIGHTNESS Brightness of resulting image |
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-c, --contrast=CONTRAST Contrast of resulting image |
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-g, --gamma=GAMMA Gamma of resulting image |
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-d, --dither=DITHER Dithering algorithm to use |
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-f, --format=FORMAT Format of the resulting image |
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-C, --charset=CHARSET Charset of the resulting image |
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DITHER list: |
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- none: no dithering |
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- ordered2: 2x2 ordered dithering |
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- ordered4: 4x4 ordered dithering |
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- ordered8: 8x8 orederd dithering |
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- random: random dithering |
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- fstein: Floyd-Steinberg dithering |
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FORMAT list: |
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- caca: native libcaca format |
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- ansi: ANSI |
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- utf8: UTF-8 with ANSI escape codes |
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- utf8cr: UTF-8 with ANSI escape codes and MS-DOS \\r |
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- html: HTML |
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- html3: backwards-compatible HTML |
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- bbfr: BBCode (French) |
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- irc: IRC with mIRC colours |
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- ps: PostScript document |
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- svg: SVG vector image |
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- tga: TGA image |
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- troff: troff source |
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CHARSET list: |
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- ascii: use only ascii character |
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- shades: use unicode character |
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- blocks: use unicode quarter-cell combinations |
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""" % (os.path.basename(sys.argv[0]), os.path.basename(sys.argv[0])) |
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VERSION_MSG="""\ |
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img2txt Copyright 2006-2007 Sam Hocevar and Jean-Yves Lamoureux |
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Copyright 2010 Alex Foulon |
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Internet: <sam@hocevar.net> <jylam@lnxscene.org> |
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<alxf@lavabit.com> version: %s |
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img2txt, along with its documentation, may be freely copied and distributed. |
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The latest version of img2txt is available from the web site, |
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http://caca.zoy.org/wiki/libcaca in the libcaca package. |
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""" % caca.get_version() |
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def main(): |
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""" Main script function. |
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""" |
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#init options vars |
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width = None |
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height = None |
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font_width = 6 |
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font_height = 10 |
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brightness = None |
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contrast = None |
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gamma = None |
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ditalgo = None |
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exformat = "ansi" |
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charset = None |
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#define long and short options |
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shortopts = "hvW:H:x:y:b:c:g:d:f:C:" |
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longopts = [ |
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"help", |
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"version", |
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"width=", |
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"height=", |
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"font-width=", |
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"font-height=", |
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"brightness=", |
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"contrast=", |
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"gamma=", |
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"dither=", |
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"format=", |
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"charset=", |
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] |
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#parse command line |
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try: |
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opts, args = getopt.getopt(sys.argv[1:], shortopts, longopts) |
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except getopt.GetoptError, err: |
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sys.stderr.write("%s\n" % str(err)) |
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sys.exit(127) |
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for o, a in opts: |
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if o in ('-h', '--help'): |
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sys.stdout.write(HELP_MSG) |
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sys.exit(0) |
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elif o in ('-v', '--version'): |
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sys.stdout.write("%s\n" % VERSION_MSG) |
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sys.exit(0) |
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elif o in ('-W', '--width'): |
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width = int(a) |
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elif o in ('-H', '--height'): |
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height = int(a) |
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elif o in ('-x', '--font-width'): |
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font_width = int(a) |
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elif o in ('-y', '--font-height'): |
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font_height = int(a) |
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elif o in ('-b', '--brightness'): |
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brightness = float(a) |
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elif o in ('-c', '--contrast'): |
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contrast = float(a) |
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elif o in ('-g', '--gamma'): |
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gamma = float(a) |
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elif o in ('-d', '--dither'): |
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ditalgo = a |
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elif o in ('-f', '--format'): |
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exformat = a |
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elif o in ('-C', '--charset'): |
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charset = a |
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if not args: |
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sys.stderr.write("%s: Missing argument...\n" % os.path.basename(sys.argv[0])) |
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sys.exit(127) |
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else: |
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try: |
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img = Image.open(args[0]) |
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img.load() |
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except IOError, err: |
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sys.stderr.write("%s\n" % err) |
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sys.exit(127) |
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if not width and not height: |
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width = 60 |
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height = width * img.size[1] * font_width / img.size[0] / font_height |
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elif width and not height: |
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height = width * img.size[1] * font_width / img.size[0] / font_height |
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elif not width and height: |
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width = height * img.size[0] * font_height / img.size[1] / font_width |
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#init canvas |
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try: |
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cv = Canvas(width, height) |
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except CanvasError, err: |
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sys.stderr.write("%s\n" % err) |
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sys.exit(127) |
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cv.set_color_ansi(caca.COLOR_DEFAULT, caca.COLOR_TRANSPARENT) |
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#init dither |
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try: |
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dit = Dither(BPP, img.size[0], img.size[1], DEPTH * img.size[0], |
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RMASK, GMASK, BMASK, AMASK) |
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except DitherError, err: |
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sys.stderr.write("%s\n" % err) |
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sys.exit(127) |
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#set dither algorithm |
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if ditalgo: |
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dit.set_algorithm(ditalgo) |
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#set brightness |
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if brightness: |
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dit.set_brightness(brightness) |
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#set gamma |
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if gamma: |
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dit.set_gamma(gamma) |
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#set contrast |
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if contrast: |
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dit.set_contrast(contrast) |
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#set charset |
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if charset: |
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dit.set_charset(charset) |
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#create dither |
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dit.bitmap(cv, 0, 0, width, height, img.tostring()) |
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#print export to screen |
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sys.stdout.write("%s" % cv.export_to_memory(exformat)) |
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if __name__ == "__main__": |
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#Import PIL package |
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try: |
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from PIL import Image |
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except ImportError, err: |
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sys.stderr.write("You need to install PIL module !\n") |
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sys.exit(2) |
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main() |
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Alex Foulon
alxf
14 лет назад