1PDF::Builder::Util(3) User Contributed Perl DocumentationPDF::Builder::Util(3)
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6 PDF::Builder::Util - utility package for often-used methods across the
7 package.
8 PREDEFINED COLORS
10 See the source of PDF::Builder::Resource::Colors for a complete list.
11 Please Note: This is an amalgamation of the X11, SGML and (X)HTML
13 specification sets.
14 There are many color model conversion and input conversion routines
16 defined here.
17 STREAM FILTERS
19 There are a number of functions here to handle stream filtering.
20 PREDEFINED GLYPH-NAMES
22 See the file "uniglyph.txt" for a complete list.
23 Please Note: You may notice that apart from the 'AGL/WGL4', names from
25 the XML, (X)HTML and SGML specification sets have been included to
26 enable interoperability towards PDF.
27 There are a number of functions here to handle various aspects of glyph
29 identification.
30 PREDEFINED PAPER SIZES
32 Dimensions are in points.
33 @box_corners = paper_size($x1,$y1, $x2,$y2);
35 Returns an array ($x1,$y1, $x2,$y2) (full bounding box).
36 @box_corners = paper_size($x1,$y1);
38 Returns an array (0,0, $x1,$y1) (half bounding box).
39 @box_corners = paper_size($media_name);
41 Returns an array (0,0, paper_width,paper_height) for the named
42 media.
43 @box_corners = paper_size($x1);
45 Returns an array (0,0, $x1,$x1) (single quadratic).
46 Otherwise, array (0,0, 612,792) (US Letter dimensions) is returned.
48 %sizes = getPaperSizes();
50 Returns a hash containing the available paper size aliases as keys
51 and their dimensions as a two-element array reference.
52 See the source of PDF::Builder::Resource::PaperSizes for the
54 complete list.
55 STRING TO DIMENSION
57 Convert a string "number [unit]" to the value in desired units. Units
58 are case-insensitive (the input is first folded to lower case).
59 Supported units: mm, cm, in (inch), pt (Big point, 72/inch), ppt
61 (printer's point, 72.27/inch), pc (pica, 6/inch), dd (Didot point,
62 67.5532/inch), and cc (Ciceros, 5.62943/inch). More can be added
63 easily. Invalid units are a fatal error.
64 $value = str2dim($string, $type, $default_units);
66 $string contains a number and optionally, a unit. Space(s) between
67 the number and the unit are optional. E.g., '200', '35.2 mm', and
68 '1.5in' are all allowable input strings.
69 $type is for validation of the input $string's numeric value. The
71 first character is i for an integer is required (no decimal point),
72 or f for other (floating point) numbers. Next is an optional c to
73 indicate that an out-of-range input value is to be silently clamped
74 to be within the given range (the default is to raise a fatal
75 error). Finally, an optional range expression: {lower limit,upper
76 limit}. The limits are either numbers or * (to indicate +/-
77 infinity (no limit) on that end of the range). { is [ to say that
78 the lower limit is included in the range, while ( says that the
79 lower limit is excluded from the range. Likewise, } is ] for
80 included upper limit, and ) for excluded. The limits (and silent
81 clamping, or fatal error if the input is out of range) are against
82 the input value, before conversion to the output units.
83 Example types:
85 'f(*,*)' no limits (the default) -- all values OK
87 'i(0,*)' integer greater than 0
88 'fc[-3.2,7.86]' a number between -3.2 and 7.86, with value clamped
89 to be within that range (including the endpoints)
90 $default_units is a required string, giving the units that the
92 input is converted to. For example, if the default units are 'pt',
93 and the input string '2 in', the output value would be '144'. If
94 the input string has no explicit units, it is assumed to be in the
95 default units (no conversion is done).
96perl v5.34.0 2021-07-22 PDF::Builder::Util(3)