/usr/lib/ruby/vendor_ruby/Tioga/Using_Paths.rb is in ruby-tioga 1.14-1.
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 | # Using_Paths.rb
module Tioga
# These are the methods and attributes related to using previously created paths in PDF graphics operations. See also Tutorial::Tutorial::SimpleFigure.
class Using_Paths < Doc < FigureMaker
# :call-seq:
# stroke_color
# stroke_color = a_color
#
# Defines the color to use for painting by #stroke operations.
def stroke_color
end
# :call-seq:
# line_color
# line_color = a_color
#
# Alias for stroke_color.
def line_color
end
# :call-seq:
# fill_color
# fill_color = a_color
#
# Defines the color to use for painting by #fill and other non-stroke graphics operations.
def fill_color
end
# :call-seq:
# stroke
#
# Paints a line along the current path. The stroked line follows each
# straight or curved segment in the path, centered on the segment with sides parallel
# to it. Each of the path's subpaths is treated separately.
#
# The results of the stroke operator depend on the current settings of various parameters
# in the graphics state.
# * The width of the stroked line is determined by the current line_width attribute.
# * The color of the line is determined by the current stroke_color attribute.
# * The line can be painted either solid or with a dash pattern, as specified by the
# current line_type attribute.
# * If a subpath is open, the unconnected ends are treated according to the current
# line_cap attribute, which may be <tt>LINE_CAP_BUTT</tt>, <tt>LINE_CAP_ROUND</tt>, or <tt>LINE_CAP_SQUARE</tt>.
# * Wherever two consecutive segments are connected, the joint between them is
# treated according to the current line_join attribute, which may be <tt>LINE_JOIN_MITER</tt>,
# <tt>LINE_JOIN_ROUND</tt>, or <tt>LINE_JOIN_BEVEL</tt>. Mitered joins are also subject to the
# current miter_limit setting.
# <b>NOTE</b>: Points at which unconnected segments happen
# to meet or intersect receive no special treatment. In particular, connecting the
# ends of a subpath with an explicit add_point_to_path operator rather than with
# close_path may result in a messy corner, because line caps will be applied
# instead of a line join.
#
# If a subpath is degenerate (consists of a single-point closed path or of two or
# more points at the same coordinates), the stroke operator paints it only if round line
# caps have been specified, producing a filled circle centered at the single point. If
# butt or projecting square line caps have been specified, stroke produces no output,
# because the orientation of the caps would be indeterminate. A single-point open subpath
# (specified by a trailing move_to_point operator) produces no output.
def stroke
end
# :call-seq:
# close_and_stroke
#
# Close and #stroke the current path.
def close_and_stroke
end
# :call-seq:
# fill
#
# Fill the path, using the nonzero winding number rule to determine the region to fill.
# Any subpaths that are open are implicitly closed before being filled. The nonzero
# winding number rule determines whether a given point is inside a path by conceptually
# drawing a ray from that point to infinity in any direction and then examining the
# places where a segment of the path crosses the ray. Starting with a count of 0, the
# rule adds 1 each time a path segment crosses the ray from left to right and subtracts
# 1 each time a segment crosses from right to left. After counting all the crossings,
# if the result is 0 then the point is outside the path; otherwise it is inside.
#
# For simple convex paths, the nonzero winding number rule defines the inside and
# outside as one would intuitively expect. The more interesting cases are those
# involving complex or self-intersecting paths. For a path consisting of a five-pointed
# star, drawn with five connected straight line segments intersecting each other, the
# rule considers the inside to be the entire area enclosed by the star, including the
# pentagon in the center. For a path composed of nested squares, the area enclosed by
# both is considered to be inside, provided that both squares are drawn in the same direction.
# If the squares are drawn in opposite directions, only the area between them is inside,
# according to the nonzero winding number rule. See also #eofill.
#
# link:images/Fill_Rules.png
def fill
end
# :call-seq:
# eofill
#
# Fill the path, using the even-odd rule to determine the region to fill. The even-odd
# rule determines the insideness of a point by drawing a ray from that point in any
# direction and simply counting the number of path segments that cross the ray,
# regardless of direction. If this number is odd, the point is inside; if even,
# the point is outside. This yields the same results as the nonzero winding number
# rule for paths with simple shapes, but produces different results for more complex
# shapes. See also #fill.
def eofill
end
# :call-seq:
# fill_and_stroke
#
# Fill and then stroke the path, using the nonzero winding number rule to determine
# the region to fill (see #fill). This produces the same result as constructing two identical
# path objects, painting the first with #fill and the second with #stroke. Note, however, that
# the filling and stroking portions of the operation consult different values of
# several graphics state parameters, such as the current color.
def fill_and_stroke
end
# :call-seq:
# eofill_and_stroke
#
# Fill and then stroke the path, using the even-odd rule to determine the region to fill (see #eofill).
def eofill_and_stroke
end
# :call-seq:
# close_fill_and_stroke
#
# Close, fill, and then stroke the path, using the nonzero winding number rule to
# determine the region to fill (see #fill).
def close_fill_and_stroke
end
# :call-seq:
# close_eofill_and_stroke
#
# Close, fill, and then stroke the path, using the even-odd rule to determine the region to fill.
def close_eofill_and_stroke
end
# :call-seq:
# clip
#
# Sets clipping path using the winding number rule (see #fill for description).
def clip
end
# :call-seq:
# eoclip
#
# Sets clipping path using the even-odd rule (see #eofill for description).
def eoclip
end
end # class
end # module Tioga
|