# pylint: disable=too-many-locals,too-many-arguments,too-many-function-args """ Usage ----- >>> import qtidenticon >>> qtidenticon.render_identicon(code, size) Return a PIL Image class instance which have generated identicon image. ``size`` specifies `patch size`. Generated image size is 3 * ``size``. """ from PyQt4 import QtGui from PyQt4.QtCore import QSize, QPointF, Qt from PyQt4.QtGui import QPixmap, QPainter, QPolygonF class IdenticonRendererBase(object): """Encapsulate methods around rendering identicons""" PATH_SET = [] def __init__(self, code): """ :param code: code for icon """ if not isinstance(code, int): code = int(code) self.code = code def render(self, size, twoColor, opacity, penwidth): """ render identicon to QPicture :param size: identicon patchsize. (image size is 3 * [size]) :returns: :class:`QPicture` """ # decode the code middle, corner, side, foreColor, secondColor, swap_cross = self.decode(self.code, twoColor) # make image image = QPixmap(QSize(size * 3 + penwidth, size * 3 + penwidth)) # fill background backColor = QtGui.QColor(255, 255, 255, opacity) image.fill(backColor) kwds = { 'image': image, 'size': size, 'foreColor': foreColor if swap_cross else secondColor, 'penwidth': penwidth, 'backColor': backColor} # middle patch image = self.drawPatchQt((1, 1), middle[2], middle[1], middle[0], **kwds) # side patch kwds['foreColor'] = foreColor kwds['patch_type'] = side[0] for i in xrange(4): pos = [(1, 0), (2, 1), (1, 2), (0, 1)][i] image = self.drawPatchQt(pos, side[2] + 1 + i, side[1], **kwds) # corner patch kwds['foreColor'] = secondColor kwds['patch_type'] = corner[0] for i in xrange(4): pos = [(0, 0), (2, 0), (2, 2), (0, 2)][i] image = self.drawPatchQt(pos, corner[2] + 1 + i, corner[1], **kwds) return image def drawPatchQt(self, pos, turn, invert, patch_type, image, size, foreColor, backColor, penwidth): # pylint: disable=unused-argument """ :param size: patch size """ path = self.PATH_SET[patch_type] if not path: # blank patch invert = not invert path = [(0., 0.), (1., 0.), (1., 1.), (0., 1.), (0., 0.)] polygon = QPolygonF([QPointF(x * size, y * size) for x, y in path]) rot = turn % 4 rect = [QPointF(0., 0.), QPointF(size, 0.), QPointF(size, size), QPointF(0., size)] rotation = [0, 90, 180, 270] nopen = QtGui.QPen(foreColor, Qt.NoPen) foreBrush = QtGui.QBrush(foreColor, Qt.SolidPattern) if penwidth > 0: pen_color = QtGui.QColor(255, 255, 255) pen = QtGui.QPen(pen_color, Qt.SolidPattern) pen.setWidth(penwidth) painter = QPainter() painter.begin(image) painter.setPen(nopen) painter.translate(pos[0] * size + penwidth / 2, pos[1] * size + penwidth / 2) painter.translate(rect[rot]) painter.rotate(rotation[rot]) if invert: # subtract the actual polygon from a rectangle to invert it poly_rect = QPolygonF(rect) polygon = poly_rect.subtracted(polygon) painter.setBrush(foreBrush) if penwidth > 0: # draw the borders painter.setPen(pen) painter.drawPolygon(polygon, Qt.WindingFill) # draw the fill painter.setPen(nopen) painter.drawPolygon(polygon, Qt.WindingFill) painter.end() return image def decode(self, code, twoColor): """virtual functions""" raise NotImplementedError class DonRenderer(IdenticonRendererBase): """ Don Park's implementation of identicon see: http://www.docuverse.com/blog/donpark/2007/01/19/identicon-updated-and-source-released """ PATH_SET = [ # [0] full square: [(0, 0), (4, 0), (4, 4), (0, 4)], # [1] right-angled triangle pointing top-left: [(0, 0), (4, 0), (0, 4)], # [2] upwardy triangle: [(2, 0), (4, 4), (0, 4)], # [3] left half of square, standing rectangle: [(0, 0), (2, 0), (2, 4), (0, 4)], # [4] square standing on diagonale: [(2, 0), (4, 2), (2, 4), (0, 2)], # [5] kite pointing topleft: [(0, 0), (4, 2), (4, 4), (2, 4)], # [6] Sierpinski triangle, fractal triangles: [(2, 0), (4, 4), (2, 4), (3, 2), (1, 2), (2, 4), (0, 4)], # [7] sharp angled lefttop pointing triangle: [(0, 0), (4, 2), (2, 4)], # [8] small centered square: [(1, 1), (3, 1), (3, 3), (1, 3)], # [9] two small triangles: [(2, 0), (4, 0), (0, 4), (0, 2), (2, 2)], # [10] small topleft square: [(0, 0), (2, 0), (2, 2), (0, 2)], # [11] downpointing right-angled triangle on bottom: [(0, 2), (4, 2), (2, 4)], # [12] uppointing right-angled triangle on bottom: [(2, 2), (4, 4), (0, 4)], # [13] small rightbottom pointing right-angled triangle on topleft: [(2, 0), (2, 2), (0, 2)], # [14] small lefttop pointing right-angled triangle on topleft: [(0, 0), (2, 0), (0, 2)], # [15] empty: []] # get the [0] full square, [4] square standing on diagonale, [8] small centered square, or [15] empty tile: MIDDLE_PATCH_SET = [0, 4, 8, 15] # modify path set for idx in xrange(len(PATH_SET)): if PATH_SET[idx]: p = [(vec[0] / 4.0, vec[1] / 4.0) for vec in PATH_SET[idx]] PATH_SET[idx] = p + p[:1] def decode(self, code, twoColor): """decode the code""" shift = 0 middleType = (code >> shift) & 0x03 shift += 2 middleInvert = (code >> shift) & 0x01 shift += 1 cornerType = (code >> shift) & 0x0F shift += 4 cornerInvert = (code >> shift) & 0x01 shift += 1 cornerTurn = (code >> shift) & 0x03 shift += 2 sideType = (code >> shift) & 0x0F shift += 4 sideInvert = (code >> shift) & 0x01 shift += 1 sideTurn = (code >> shift) & 0x03 shift += 2 blue = (code >> shift) & 0x1F shift += 5 green = (code >> shift) & 0x1F shift += 5 red = (code >> shift) & 0x1F shift += 5 second_blue = (code >> shift) & 0x1F shift += 5 second_green = (code >> shift) & 0x1F shift += 5 second_red = (code >> shift) & 0x1F shift += 1 swap_cross = (code >> shift) & 0x01 middleType = self.MIDDLE_PATCH_SET[middleType] foreColor = (red << 3, green << 3, blue << 3) foreColor = QtGui.QColor(*foreColor) if twoColor: secondColor = (second_blue << 3, second_green << 3, second_red << 3) secondColor = QtGui.QColor(*secondColor) else: secondColor = foreColor return (middleType, middleInvert, 0),\ (cornerType, cornerInvert, cornerTurn),\ (sideType, sideInvert, sideTurn),\ foreColor, secondColor, swap_cross def render_identicon(code, size, twoColor=False, opacity=255, penwidth=0, renderer=None): """Render an image""" if not renderer: renderer = DonRenderer return renderer(code).render(size, twoColor, opacity, penwidth)