TrEd is able to render trees to PostScript, Encapsulated PostScript (EPS), and Portable Document Format (PDF). Should the trees contain non-latin (iso-8859-1, iso-8859-2, windows-1250, etc.) characters, such as Arabic, the PDF might be the only option, because of its support for TrueType fonts.
If ImageMagick toolkit is installed, TrEd can also automatically convert the result into one of many bitmap image formats supported by this toolkit.
While PostScript is the default printing format on most Unix/Linux systems (and can be printed using the standard lpr command), Windows users may use for example Adobe Acrobat Reader to preview and print trees rendered into PDF. There are also some free PostScript interpreters for Windows (see GhostView).
Encapsulated PostScript files (EPS) are especially useful for
preparation of other printed materials e.g. PDF of LaTeX documents. Compared to
bitmapped images, EPS images have the advantage of being
scalable. Most office suits (such as Microsoft Office and
OpenOffice.org) have at least limited support for EPS. Similar
results can be obtained by using PDF
with BBox media size.
Note
TrEd's ability to render PostScript
and EPS is limitted to Eastern European character sets.
For other charsets and unicode (especially when TrEd
runs on a unicode aware versions of
Perl and Tk,
i.e. at least Perl 5.8 and
Tk804), PDF print format is recommended.
Printing into PDF requires a TrueType font containing at
least the glyphs used in the tree. For most languages,
the usual fonts such as Arial
(arial.ttf), Times New Roman
(times.ttf) or Bitstream Vera
(vera.ttf) are sufficient while other
languages, such as Arabic, require a fully featured
Unicode font such as Arial Unicode MS.
The TrueType font can be specified either directly
from the Print dialog or by setting TTFont
configuration option. If TTFont
is not given, it defaults to Arial.
TrEd searches for TrueType fonts in directories listed in
TTFontPath
configuration option. If this option is not explicitly
specified, TrEd uses directories listed in
fontconfig library configuration file
/etc/fonts/fonts.conf on Unix
and Windows system font directory on Windows.
If no usable font is found, PDF printing is disabled.
For PostScript printing, TrEd
uses a Type1 font. The file containing the font may be
specified using the PsFontFile
(and optionally PsFontAFMFile)
configuration option.
In the Print dialog you can specify a printing command to be used or (if Print to file is checked) a filename of the destination file.
You can also specify a media-type (paper format) in the Media roll-out menu, page width and height (in case of
Usermedia-type), and horizontal and vertical margins. If the printed tree exceeds specified page boundaries, it is automatically shrunk and (unless Disable landscape rotation of wide trees is selected) rotated to fit on the page. SeePSMediaconfiguration option for a list of supported media formats.The output format is specified by selecting one of Create PostScript, Create EPS, Create PDF and Convert according to ImageMagick buttons.
If ImageMagick utilities are installed on the system, then automatic conversion to one of many image formats is supported. To use it, first check the Convert according to file extension button, then select a desired pixel resolution for conversion to bitmap, and finally edit the output filename extension to that of the desired output file-format such as
.pngor.jpg. When converting to a bitmap, Resolution may be specified to adjust the mapping between PostScript coordinate system units (given in 1/72 inch) to raster pixels.If you also want the “sentence” of the tree (i.e. the usual context of the text window above the tree) to be printed under the tree, check the Print sentence button.
It is possible to print more than one tree (each tree then appears on a separate page). To do so, a comma-separated list of tree numbers or ranges of tree numbers that correspond to the desired trees in the active file, must be entered into the Page range field. The
button is be used to automatically insert a page range
corresponding to sentences selected via ->. A different selection based on
“sentences” can be made by pressing the button
.
If entered manually, the page range must be specified according to the following rules: Trees in the file are numbered starting from 1. Ranges are pairs of numbers of the form “
3-20” (which in this case covers all trees starting from the tree no. 3 to no. 20). If the first number in the range is omitted, 1 is assumed. If the second number in the range is ommited, the number of the last tree in the active file is assumed. The order of the tree numbers given in the list is strictly reflected in the output file, which also means that ceratin tree can be printed more than once.Example:
To print trees from 1 to 5, then trees no. 7, 11, 12 and 5 again, use e.g. one of the following lists:
1-5,7,11,12,51-5,7,11-12,5-5,7,11-12,5
Note
Printing trees can also be automated by writing a suitable
macro. For this purpose, TrEd API offers the function
Print (see Section 14.8, “Public API: pre-defined macros”). This function however requires
TrEd GUI, i.e. it cannot be run in btred.
Example 1. Printing trees from a user-defined macro
# bind key p to CreateImages menu Create bitmap images of all trees
sub CreateImages {
GotoTree(1);
my $tree_no = 1;
my $name = FileName();
$name =~ s/\..*//; # strip filename suffix
do {{
TredMacro::Print(
-toFile => 1,
-format => 'ImageMagick',
-imageMagickResolution => 90,
-colors => 1,
-sentenceInfo => 1,
-filename => "${name}_${tree_no}.png"
);
$tree_no++;
}} while NextTree();
}