This file is indexed.

/usr/lib/python3/dist-packages/pyx/mesh.py is in python3-pyx 0.14.1-1build1.

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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
# -*- encoding: utf-8 -*-
#
#
# Copyright (C) 2006-2011 André Wobst <wobsta@users.sourceforge.net>
#
# This file is part of PyX (http://pyx.sourceforge.net/).
#
# PyX is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PyX is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with PyX; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA


# Just a quick'n'dirty ascii art (I'll do a nice PyX plot later on):
#
#
#      node1 *
#            | \
#            |   \  neighbor2
#            |     \
#            |       \
#  neighbor3 |element * node3
#            |       /
#            |     /
#            |   /  neighbor1
#            | /
#      node2 *


import struct, binascii, zlib, os, tempfile
from . import bbox, baseclasses, color, pdfwriter, unit


class node_pt:

    def __init__(self, coords_pt, value):
        self.coords_pt = coords_pt
        self.value = value


class node(node_pt):

    def __init__(self, coords, value):
        node_pt.__init__(self, [unit.topt(coord) for coord in coords], value)


class element:

    def __init__(self, nodes, neighbors=None):
        self.nodes = nodes
        self.neighbors = neighbors


def coords24bit_pt(coords_pt, min_pt, max_pt):
    return struct.pack(">I", int((coords_pt-min_pt)*16777215.0/(max_pt-min_pt)))[1:]


class PDFGenericResource(pdfwriter.PDFobject):

    def __init__(self, type, name, content):
        pdfwriter.PDFobject.__init__(self, type, name)
        self.content = content

    def write(self, file, writer, registry):
        file.write_bytes(self.content)


class mesh(baseclasses.canvasitem):

    def __init__(self, elements, check=1):
        self.elements = elements
        if check:
            colorspacestring = ""
            for element in elements:
                if len(element.nodes) != 3:
                    raise ValueError("triangular mesh expected")
                try:
                    for node in element.nodes:
                        if not colorspacestring:
                            colorspacestring = node.value.colorspacestring()
                        elif node.value.colorspacestring() != colorspacestring:
                            raise ValueError("color space mismatch")
                except AttributeError:
                    raise ValueError("gray, rgb or cmyk color values expected")
                for node in element.nodes:
                    if len(node.coords_pt) != 2:
                        raise ValueError("two dimensional coordinates expected")

    def bbox(self):
        return bbox.bbox_pt(min([node.coords_pt[0] for element in self.elements for node in element.nodes]),
                            min([node.coords_pt[1] for element in self.elements for node in element.nodes]),
                            max([node.coords_pt[0] for element in self.elements for node in element.nodes]),
                            max([node.coords_pt[1] for element in self.elements for node in element.nodes]))

    def data(self, bbox):
        return b"".join([b"\000" + coords24bit_pt(node.coords_pt[0], bbox.llx_pt, bbox.urx_pt) +
                                   coords24bit_pt(node.coords_pt[1], bbox.lly_pt, bbox.ury_pt) +
                                   node.value.to8bitbytes()
                         for element in self.elements for node in element.nodes])

    def processPS(self, file, writer, context, registry, bbox):
        if writer.mesh_as_bitmap:
            from pyx import bitmap, canvas
            from PIL import Image
            c = canvas.canvas()
            c.insert(self)
            i = Image.open(c.pipeGS("pngalpha", resolution=writer.mesh_as_bitmap_resolution))
            i.load()
            b = bitmap.bitmap_pt(self.bbox().llx_pt, self.bbox().lly_pt, i)
            # we slightly shift the bitmap to re-center it, as the bitmap might contain some additional border
            # unfortunately we need to construct another bitmap instance for that ...
            b = bitmap.bitmap_pt(self.bbox().llx_pt + 0.5*(self.bbox().width_pt()-b.bbox().width_pt()),
                                 self.bbox().lly_pt + 0.5*(self.bbox().height_pt()-b.bbox().height_pt()), i)
            b.processPS(file, writer, context, registry, bbox)
        else:
            thisbbox = self.bbox()
            bbox += thisbbox
            file.write("""<< /ShadingType 4
/ColorSpace %s
/BitsPerCoordinate 24
/BitsPerComponent 8
/BitsPerFlag 8
/Decode [%f %f %f %f %s]
/DataSource currentfile /ASCIIHexDecode filter /FlateDecode filter
>> shfill\n""" % (self.elements[0].nodes[0].value.colorspacestring(),
                  thisbbox.llx_pt, thisbbox.urx_pt, thisbbox.lly_pt, thisbbox.ury_pt,
                  " ".join(["0 1" for value in self.elements[0].nodes[0].value.to8bitbytes()])))
            file.write_bytes(binascii.b2a_hex(zlib.compress(self.data(thisbbox))))
            file.write(">\n")

    def processPDF(self, file, writer, context, registry, bbox):
        if writer.mesh_as_bitmap:
            from pyx import bitmap, canvas
            from PIL import Image
            c = canvas.canvas()
            c.insert(self)
            i = Image.open(c.pipeGS("pngalpha", resolution=writer.mesh_as_bitmap_resolution))
            i.load()
            b = bitmap.bitmap_pt(self.bbox().llx_pt, self.bbox().lly_pt, i)
            # we slightly shift the bitmap to re-center it, as the bitmap might contain some additional border
            # unfortunately we need to construct another bitmap instance for that ...
            b = bitmap.bitmap_pt(self.bbox().llx_pt + 0.5*(self.bbox().width_pt()-b.bbox().width_pt()),
                                 self.bbox().lly_pt + 0.5*(self.bbox().height_pt()-b.bbox().height_pt()), i)
            b.processPDF(file, writer, context, registry, bbox)
        else:
            thisbbox = self.bbox()
            bbox += thisbbox
            d = self.data(thisbbox)
            if writer.compress:
                filter = "/Filter /FlateDecode\n"
                d = zlib.compress(d)
            else:
                filter = ""
            name = "shading-%s" % id(self)
            shading = PDFGenericResource("shading", name, ("""<<
/ShadingType 4
/ColorSpace %s
/BitsPerCoordinate 24
/BitsPerComponent 8
/BitsPerFlag 8
/Decode [%f %f %f %f %s]
/Length %i
%s>>
stream
""" %            (self.elements[0].nodes[0].value.colorspacestring(),
                  thisbbox.llx_pt, thisbbox.urx_pt, thisbbox.lly_pt, thisbbox.ury_pt,
                  " ".join(["0 1" for value in self.elements[0].nodes[0].value.to8bitbytes()]),
                  len(d), filter)).encode('ascii') + d + b"\nendstream\n")
            registry.add(shading)
            registry.addresource("Shading", name, shading)
            file.write("/%s sh\n" % name)

    def processSVG(self, xml, writer, context, registry, bbox):
        from pyx import bitmap, canvas
        from PIL import Image
        c = canvas.canvas()
        c.insert(self)
        i = Image.open(c.pipeGS("pngalpha", resolution=writer.mesh_as_bitmap_resolution))
        i.load()
        b = bitmap.bitmap_pt(self.bbox().llx_pt, self.bbox().lly_pt, i)
        # we slightly shift the bitmap to re-center it, as the bitmap might contain some additional border
        # unfortunately we need to construct another bitmap instance for that ...
        b = bitmap.bitmap_pt(self.bbox().llx_pt + 0.5*(self.bbox().width_pt()-b.bbox().width_pt()),
                             self.bbox().lly_pt + 0.5*(self.bbox().height_pt()-b.bbox().height_pt()), i)
        b.processSVG(xml, writer, context, registry, bbox)