91 lines
3.2 KiB
Python
91 lines
3.2 KiB
Python
#!/usr/bin/env python2
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'''Qubes Image Generation
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Toolkit for generating icons and images for Qubes OS.'''
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2013-2015 Wojtek Porczyk <woju@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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from __future__ import absolute_import
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__all__ = ['make_padlock']
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import math
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import cairo
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import qubesimgconverter
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def polar(r, a):
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return r * math.cos(a), r * math.sin(a)
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def make_padlock(dst, colour, size=qubesimgconverter.ICON_MAXSIZE, disp=False):
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cs = cairo.ImageSurface(cairo.FORMAT_ARGB32, size, size)
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cr = cairo.Context(cs)
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cr.set_source_rgb(*[c / 256.0
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for c in qubesimgconverter.hex_to_int(colour)])
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cr.set_line_width(.125 * size)
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cr.rectangle(.125 * size, .5 * size, .75 * size, .4375 * size)
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cr.fill()
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cr.move_to(.25 * size, .5 * size)
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cr.line_to(.25 * size, .375 * size)
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cr.arc(.5 * size, .375 * size, .25 * size, math.pi, 2 * math.pi)
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cr.move_to(.75 * size, .375 * size) # this is unneccessary, but helps readability
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cr.line_to(.75 * size, .5 * size)
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cr.stroke()
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if disp:
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# Careful with those. I have run into severe
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# floating point errors when adjusting.
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arrows = 2
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gap = 45 * math.pi / 180
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offset = 0
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radius = .1875 * size
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width = 0.05 * size
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cx = .5 * size
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# cy = .6875 * size
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cy = .625 * size
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arrow = 2 * math.pi / arrows
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for i in range(arrows):
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cr.move_to(cx, cy)
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cr.rel_move_to(*polar( radius - width, offset + i * arrow))
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cr.arc(cx, cy, radius - width, offset + i * arrow, offset + (i + 1) * arrow - gap)
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cr.rel_line_to(*polar( width, offset + (i + 1) * arrow - gap + math.pi))
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cr.rel_line_to(*polar( width * math.sqrt(8), offset + (i + 1) * arrow - gap + math.pi / 4))
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cr.rel_line_to(*polar( width * math.sqrt(8), offset + (i + 1) * arrow - gap - math.pi / 4))
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cr.rel_line_to(*polar( width, offset + (i + 1) * arrow - gap + math.pi))
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cr.arc_negative(cx, cy, radius + width, offset + (i + 1) * arrow - gap, offset + i * arrow)
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cr.close_path()
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cr.set_source_rgb(0xcc / 256.0, 0, 0) # tango's red
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cr.set_line_width(.0500 * size)
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cr.set_line_join(cairo.LINE_JOIN_ROUND)
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cr.stroke_preserve()
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cr.set_source_rgb(1.0, 1.0, 1.0)
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cr.fill()
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cs.write_to_png(dst)
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# vim: ft=python sw=4 ts=4 et
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