/usr/share/pyshared/aafigure/pil.py is in python-aafigure 0.5-4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 | """\
Bitmap renderer for the aafigure package, using the Python Imaging Library.
(C) 2006 Chris Liechti <cliechti@gmx.net>
This is open source software under the BSD license. See LICENSE.txt for more
details.
"""
import sys
from error import UnsupportedFormatError
PIL_OK = False
try:
import Image, ImageDraw
PIL_OK = True
except ImportError:
pass
if PIL_OK is False:
try:
from PIL import Image, ImageDraw
except ImportError:
raise UnsupportedFormatError('please install PIL to get bitmaps output support')
import PILhelper
class PILOutputVisitor:
"""Render a list of shapes as bitmap.
"""
def __init__(self, options):
self.options = options
self.scale = options['scale']*8
self.debug = options['debug']
self.line_width = options['line_width']
self.foreground = options['foreground']
self.background = options['background']
self.fillcolor = options['fill']
def _num(self, number):
return number * self.scale
def visit_image(self, aa_image):
"""Process the given ASCIIArtFigure and draw the shapes in
the bitmap file
"""
self.aa_image = aa_image # save for later XXX not optimal to do it here
self.width = (aa_image.width+1)*aa_image.nominal_size*aa_image.aspect_ratio
self.height = (aa_image.height+1)*aa_image.nominal_size
# if font is given explicit, use it instead of proportional flag
font_size = int(self._num(self.aa_image.nominal_size*1.1))
if 'font' in self.options:
self.font = PILhelper.font_by_name(self.options['font'], font_size)
else:
self.font = PILhelper.font_by_type(self.options['proportional'], font_size)
if self.font is None:
sys.stderr.write("WARNING: font not found, using PIL default font\n")
self.image = Image.new(
'RGB',
(int(self._num(self.width)), int(self._num(self.height))),
self.background
)
self.draw = ImageDraw.Draw(self.image)
#~ if self.debug:
#~ #draw a rectangle around entire image
#~ self._rectangle(
#~ 0,0,
#~ aa_image.width, aa_image.height,
#~ style = 'fill:none;',
#~ )
self.visit_shapes(aa_image.shapes)
del self.draw
file_type = self.options['format'].lower()
if file_type == 'jpg': file_type = 'jpeg' # alias
try:
if 'file_like' in self.options:
self.image.save(self.options['file_like'], file_type)
except KeyError:
raise UnsupportedFormatError("PIL doesn't support image format %r" %
file_type)
def visit_shapes(self, shapes):
for shape in shapes:
shape_name = shape.__class__.__name__.lower()
visitor_name = 'visit_%s' % shape_name
if hasattr(self, visitor_name):
getattr(self, visitor_name)(shape)
else:
sys.stderr.write("WARNING: don't know how to handle shape %r\n"
% shape)
def visit_group(self, group):
self.visit_shapes(group.shapes)
# - - - - - - drawing helpers - - - - - - -
def _line(self, x1, y1, x2, y2):
"""Draw a line, coordinates given as four decimal numbers"""
self.draw.line((self._num(x1), self._num(y1),
self._num(x2), self._num(y2)),
fill=self.foreground) #self.line_width
def _rectangle(self, x1, y1, x2, y2):
"""Draw a rectangle, coordinates given as four decimal numbers.
``style`` is inserted in the SVG. It could be e.g. "fill:yellow"
"""
self.draw.rectangle((self._num(x1), self._num(y1),
self._num(x2), self._num(y2)),
fill=self.fillcolor,
outline=self.foreground) #self.line_width
# - - - - - - visitor function for the different shape types - - - - - - -
def visit_point(self, point):
dotsize = 2
self.draw.ellipse(
(
self._num(point.x)-dotsize, self._num(point.y)-dotsize,
self._num(point.x)+dotsize, self._num(point.y)+dotsize
),
fill=self.foreground
)
def visit_line(self, line):
x1, x2 = line.start.x, line.end.x
y1, y2 = line.start.y, line.end.y
self._line(x1, y1, x2, y2)
def visit_rectangle(self, rectangle):
self._rectangle(
rectangle.p1.x, rectangle.p1.y,
rectangle.p2.x, rectangle.p2.y,
)
def visit_circle(self, circle):
self.draw.ellipse(
(
self._num(circle.center.x-circle.radius), self._num(circle.center.y-circle.radius),
self._num(circle.center.x+circle.radius), self._num(circle.center.y+circle.radius)
),
fill=self.fillcolor,
outline=self.foreground,
)
def visit_label(self, label):
# font-weight="bold"
self.draw.text(
(self._num(label.position.x), self._num(label.position.y-self.aa_image.nominal_size*1.1)),
label.text,
fill=self.foreground,
font=self.font
)
def _bezier(self, p1, c1, c2, p2, level=1):
# de Casteljau's algorithm
if self._num(p1.distance(p2)) <= 3:
self._line(p1.x, p1.y, p2.x, p2.y)
else:
cmid = c1.midpoint(c2)
lp1 = p1
lc1 = p1.midpoint(c1)
lc2 = lc1.midpoint(cmid)
rp2 = p2
rc2 = p2.midpoint(c2)
rc1 = rc2.midpoint(cmid)
lp2 = rc1.midpoint(lc2)
rp1 = lp2
self._bezier(lp1, lc1, lc2, lp2, level + 1)
self._bezier(rp1, rc1, rc2, rp2, level + 1)
def visit_arc(self, arc):
p1, p2 = arc.start, arc.end
c1 = arc.start_control_point()
c2 = arc.end_control_point()
self._bezier(p1, c1, c2, p2)
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