263 lines
7.5 KiB
Python
263 lines
7.5 KiB
Python
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#!/usr/bin/env python
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# -*- coding:utf-8 -*-
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"""
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identicon.py
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identicon python implementation.
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by Shin Adachi <shn@glucose.jp>
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= usage =
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== commandline ==
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>>> python identicon.py [code]
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== python ==
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>>> import identicon
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>>> identicon.render_identicon(code, size)
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Return a PIL Image class instance which have generated identicon image.
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```size``` specifies `patch size`. Generated image size is 3 * ```size```.
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"""
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# g
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# PIL Modules
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import Image
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import ImageDraw
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import ImagePath
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import ImageColor
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__all__ = ['render_identicon', 'IdenticonRendererBase']
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class Matrix2D(list):
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"""Matrix for Patch rotation"""
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def __init__(self, initial=[0.] * 9):
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assert isinstance(initial, list) and len(initial) == 9
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list.__init__(self, initial)
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def clear(self):
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for i in xrange(9):
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self[i] = 0.
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def set_identity(self):
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self.clear()
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for i in xrange(3):
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self[i] = 1.
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def __str__(self):
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return '[%s]' % ', '.join('%3.2f' % v for v in self)
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def __mul__(self, other):
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r = []
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if isinstance(other, Matrix2D):
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for y in xrange(3):
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for x in xrange(3):
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v = 0.0
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for i in xrange(3):
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v += (self[i * 3 + x] * other[y * 3 + i])
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r.append(v)
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else:
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raise NotImplementedError
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return Matrix2D(r)
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def for_PIL(self):
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return self[0:6]
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@classmethod
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def translate(kls, x, y):
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return kls([1.0, 0.0, float(x),
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0.0, 1.0, float(y),
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0.0, 0.0, 1.0])
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@classmethod
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def scale(kls, x, y):
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return kls([float(x), 0.0, 0.0,
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0.0, float(y), 0.0,
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0.0, 0.0, 1.0])
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"""
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# need `import math`
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@classmethod
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def rotate(kls, theta, pivot=None):
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c = math.cos(theta)
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s = math.sin(theta)
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matR = kls([c, -s, 0., s, c, 0., 0., 0., 1.])
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if not pivot:
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return matR
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return kls.translate(-pivot[0], -pivot[1]) * matR *
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kls.translate(*pivot)
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"""
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@classmethod
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def rotateSquare(kls, theta, pivot=None):
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theta = theta % 4
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c = [1., 0., -1., 0.][theta]
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s = [0., 1., 0., -1.][theta]
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matR = kls([c, -s, 0., s, c, 0., 0., 0., 1.])
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if not pivot:
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return matR
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return kls.translate(-pivot[0], -pivot[1]) * matR * \
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kls.translate(*pivot)
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class IdenticonRendererBase(object):
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PATH_SET = []
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def __init__(self, code):
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"""
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@param code code for icon
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"""
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if not isinstance(code, int):
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code = int(code)
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self.code = code
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def render(self, size):
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"""
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render identicon to PIL.Image
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@param size identicon patchsize. (image size is 3 * [size])
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@return PIL.Image
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"""
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# decode the code
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middle, corner, side, foreColor, backColor = self.decode(self.code)
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# make image
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image = Image.new("RGB", (size * 3, size * 3))
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draw = ImageDraw.Draw(image)
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# fill background
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draw.rectangle((0, 0, image.size[0], image.size[1]), fill=0)
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kwds = {
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'draw': draw,
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'size': size,
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'foreColor': foreColor,
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'backColor': backColor}
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# middle patch
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self.drawPatch((1, 1), middle[2], middle[1], middle[0], **kwds)
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# side patch
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kwds['type'] = side[0]
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for i in xrange(4):
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pos = [(1, 0), (2, 1), (1, 2), (0, 1)][i]
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self.drawPatch(pos, side[2] + 1 + i, side[1], **kwds)
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# corner patch
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kwds['type'] = corner[0]
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for i in xrange(4):
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pos = [(0, 0), (2, 0), (2, 2), (0, 2)][i]
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self.drawPatch(pos, corner[2] + 1 + i, corner[1], **kwds)
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return image
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def drawPatch(self, pos, turn, invert, type, draw, size, foreColor,
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backColor):
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"""
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@param size patch size
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"""
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path = self.PATH_SET[type]
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if not path:
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# blank patch
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invert = not invert
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path = [(0., 0.), (1., 0.), (1., 1.), (0., 1.), (0., 0.)]
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patch = ImagePath.Path(path)
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if invert:
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foreColor, backColor = backColor, foreColor
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mat = Matrix2D.rotateSquare(turn, pivot=(0.5, 0.5)) *\
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Matrix2D.translate(*pos) *\
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Matrix2D.scale(size, size)
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patch.transform(mat.for_PIL())
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draw.rectangle((pos[0] * size, pos[1] * size, (pos[0] + 1) * size,
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(pos[1] + 1) * size), fill=backColor)
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draw.polygon(patch, fill=foreColor, outline=foreColor)
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### virtual functions
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def decode(self, code):
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raise NotImplementedError
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class DonRenderer(IdenticonRendererBase):
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"""
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Don Park's implementation of identicon
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see : http://www.docuverse.com/blog/donpark/2007/01/19/identicon-updated-and-source-released
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"""
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PATH_SET = [
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[(0, 0), (4, 0), (4, 4), (0, 4)], # 0
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[(0, 0), (4, 0), (0, 4)],
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[(2, 0), (4, 4), (0, 4)],
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[(0, 0), (2, 0), (2, 4), (0, 4)],
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[(2, 0), (4, 2), (2, 4), (0, 2)], # 4
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[(0, 0), (4, 2), (4, 4), (2, 4)],
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[(2, 0), (4, 4), (2, 4), (3, 2), (1, 2), (2, 4), (0, 4)],
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[(0, 0), (4, 2), (2, 4)],
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[(1, 1), (3, 1), (3, 3), (1, 3)], # 8
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[(2, 0), (4, 0), (0, 4), (0, 2), (2, 2)],
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[(0, 0), (2, 0), (2, 2), (0, 2)],
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[(0, 2), (4, 2), (2, 4)],
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[(2, 2), (4, 4), (0, 4)],
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[(2, 0), (2, 2), (0, 2)],
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[(0, 0), (2, 0), (0, 2)],
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[]] # 15
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MIDDLE_PATCH_SET = [0, 4, 8, 15]
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# modify path set
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for idx in xrange(len(PATH_SET)):
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if PATH_SET[idx]:
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p = map(lambda vec: (vec[0] / 4.0, vec[1] / 4.0), PATH_SET[idx])
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PATH_SET[idx] = p + p[:1]
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def decode(self, code):
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# decode the code
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middleType = self.MIDDLE_PATCH_SET[code & 0x03]
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middleInvert= (code >> 2) & 0x01
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cornerType = (code >> 3) & 0x0F
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cornerInvert= (code >> 7) & 0x01
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cornerTurn = (code >> 8) & 0x03
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sideType = (code >> 10) & 0x0F
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sideInvert = (code >> 14) & 0x01
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sideTurn = (code >> 15) & 0x03
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# bug reported by Masato Hagiwara
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# http://lilyx.net/iconlang-en/
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# blue = (code >> 16) & 0x1F
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# green = (code >> 21) & 0x1F
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blue = (code >> 17) & 0x1F
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green = (code >> 22) & 0x1F
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red = (code >> 27) & 0x1F
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foreColor = (red << 3, green << 3, blue << 3)
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return (middleType, middleInvert, 0),\
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(cornerType, cornerInvert, cornerTurn),\
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(sideType, sideInvert, sideTurn),\
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foreColor, ImageColor.getrgb('white')
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def render_identicon(code, size, renderer=None):
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if not renderer:
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renderer = DonRenderer
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return renderer(code).render(size)
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if __name__ == '__main__':
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import sys
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if len(sys.argv) < 2:
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print 'usage: python identicon.py [CODE]....'
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raise SystemExit
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for code in sys.argv[1:]:
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if code.startswith('0x') or code.startswith('0X'):
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code = int(code[2:], 16)
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elif code.startswith('0'):
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code = int(code[1:], 8)
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else:
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code = int(code)
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icon = render_identicon(code, 24)
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icon.save('%08x.png' % code, 'PNG')
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