PDF::Builder::Util(3)

NAME
PDF::Builder::Util - utility package for often-used methods across the package.

  PREDEFINED COLORS
See the source of PDF::Builder::Resource::Colors for a complete list.

Please Note: This is an amalgamation of the X11, SGML and (X)HTML specification sets.

There are many color model conversion and input conversion routines defined here.

  STREAM FILTERS
There are a number of functions here to handle stream filtering.

  PREDEFINED GLYPH-NAMES
See the file "uniglyph.txt" for a complete list.

Please Note: You may notice that apart from the 'AGL/WGL4', names from the XML, (X)HTML and SGML specification sets have been included to enable interoperability towards PDF.

There are a number of functions here to handle various aspects of glyph identification.

  PREDEFINED PAPER SIZES
Dimensions are in points.

@box_corners = paper_size($x1,$y1, $x2,$y2);
    Returns an array ($x1,$y1, $x2,$y2) (full bounding box).

@box_corners = paper_size($x1,$y1);
    Returns an array (0,0, $x1,$y1) (half bounding box).

@box_corners = paper_size($media_name);
    Returns an array (0,0, paper_width,paper_height) for the named media.

@box_corners = paper_size($x1);
    Returns an array (0,0, $x1,$x1) (single quadratic).

    Otherwise, array (0,0, 612,792) (US Letter dimensions) is returned.

%sizes = getPaperSizes();
    Returns a hash containing the available paper size aliases as keys and their dimensions as a two-element array reference.

    See the source of PDF::Builder::Resource::PaperSizes for the complete list.

  STRING TO DIMENSION
Convert a string "number [unit]" to the value in desired units. Units are case-insensitive (the input is first folded to lower case).

Supported units: mm, cm, in (inch), pt (Big point, 72/inch), ppt (printer's point, 72.27/inch), pc (pica, 6/inch), dd (Didot point, 67.5532/inch), and cc (Ciceros, 5.62943/inch). More can be added easily. Invalid units are a fatal error.

$value = str2dim($string, $type, $default_units);
    $string contains a number and optionally, a unit. Space(s) between the number and the unit are optional. E.g., '200', '35.2 mm', and '1.5in' are all allowable input strings.

    $type is for validation of the input $string's numeric value. The first character is i for an integer is required (no decimal point), or f for other (floating point) numbers. Next is an optional c to indicate that an out-of-range input value is to be silently clamped to be within the given range (the default is to raise a fatal error). Finally, an optional range expression: {lower limit,upper limit}. The limits are either numbers or * (to indicate +/- infinity (no limit) on that end of the range). { is [ to say that the lower limit is included in the range, while ( says that the lower limit is excluded from the range. Likewise, } is ] for included upper limit, and ) for excluded. The limits (and silent clamping, or fatal error if the input is out of range) are against the input value, before conversion to the output units.

    Example types:

    'f(*,*)'  no limits (the default) -- all values OK
    'i(0,*)'  integer greater than 0
    'fc[-3.2,7.86]'  a number between -3.2 and 7.86, with value clamped to be within that range (including the endpoints)

    $default_units is a required string, giving the units that the input is converted to. For example, if the default units are 'pt', and the input string '2 in', the output value would be '144'. If the input string has no explicit units, it is assumed to be in the default units (no conversion is done).