PostScript::Simple::EPUser Contributed Perl DocumentPostScript::Simple::EPS(3)NAMEPostScript::Simple::EPS - EPS support for PostScript::Simple
SYNOPSIS
use PostScript::Simple;
# create a new PostScript object
$p = new PostScript::Simple(papersize => "A4",
colour => 1,
units => "in");
# create a new page
$p->newpage;
# add an eps file
$p->add_eps({xsize => 3}, "test.eps", 1,1);
$p->add_eps({yscale => 1.1, xscale => 1.8}, "test.eps", 4,8);
# create an eps object
$e = new PostScript::Simple::EPS(file => "test.eps");
$e->rotate(90);
$e->xscale(0.5);
$p->add_eps($e, 3, 3); # add eps object to postscript object
$e->xscale(2);
$p->add_eps($e, 2, 5); # add eps object to postscript object again
# write the output to a file
$p->output("file.ps");
DESCRIPTIONPostScript::Simple::EPS allows you to add EPS files into
PostScript::Simple objects. Included EPS files can be scaled and
rotated, and placed anywhere inside a PostScript::Simple page.
Remember when using translate/scale/rotate that you will normally need
to do the operations in the reverse order to that which you expect.
PREREQUISITES
This module requires "PostScript::Simple", "strict", "Carp" and
"Exporter".
EXPORT
None.
CONSTRUCTOR
"new(options)"
Create a new PostScript::Simple::EPS object. The options that can
be set are:
file
EPS file to be included. This or "source" must exist when the
"new" method is called.
source
PostScript code for the EPS document. Either this or "file"
must be set when "new" is called.
clip
Set to 0 to disable clipping to the EPS bounding box. Default
is to clip.
Example:
$ps = new PostScript::Simple(landscape => 1,
eps => 0,
xsize => 4,
ysize => 3,
units => "in");
$eps = new PostScript::Simple::EPS(file => "test.eps");
$eps->scale(0.5);
Scale the EPS file by x0.5 in both directions.
$ps->newpage();
$ps->importeps($eps, 1, 1);
Add the EPS file to the PostScript document at coords (1,1).
$ps->importepsfile("another.eps", 1, 2, 4, 4);
Easily add an EPS file to the PostScript document using bounding
box (1,2),(4,4).
The methods "importeps" and "importepsfile" are described in the
documentation of "PostScript::Simple".
OBJECT METHODS
All object methods return 1 for success or 0 in some error condition
(e.g. insufficient arguments). Error message text is also drawn on the
page.
"get_bbox"
Returns the EPS bounding box, as specified on the %%BoundingBox
line of the EPS file. Units are standard PostScript points.
Example:
($x1, $y1, $x2, $y2) = $eps->get_bbox();
"width"
Returns the EPS width.
Example:
print "EPS width is " . abs($eps->width()) . "\n";
"height"
Returns the EPS height.
Example:
To scale $eps to 72 points high, do:
$eps->scale(1, 72/$eps->height());
"scale(x, y)"
Scales the EPS file. To scale in one direction only, specify 1 as
the other scale. To scale the EPS file the same in both directions,
you may use the shortcut of just specifying the one value.
Example:
$eps->scale(1.2, 0.8); # make wider and shorter
$eps->scale(0.5); # shrink to half size
"rotate(deg)"
Rotates the EPS file by "deg" degrees anti-clockwise. The EPS file
is rotated about it's own origin (as defined by it's bounding box).
To rotate by a particular co-ordinate (again, relative to the EPS
file, not the main PostScript document), use translate, too.
Example:
$eps->rotate(180); # turn upside-down
To rotate 30 degrees about point (50,50):
$eps->translate(50, 50);
$eps->rotate(30);
$eps->translate(-50, -50);
"translate(x, y)"
Move the EPS file by "x","y" PostScript points.
Example:
$eps->translate(10, 10); # move 10 points in both directions
"reset"
Clear all translate, rotate and scale operations.
Example:
$eps->reset();
"load"
Reads the EPS file into memory, to save reading it from file each
time if inserted many times into a document. Can not be used with
"preload".
"preload(object)"
Experimental: defines the EPS at in the document prolog, and just
runs a command to insert it each time it is used. "object" is a
PostScript::Simple object. If the EPS file is included more than
once in the PostScript file then this will probably shrink the
filesize quite a lot.
Can not be used at the same time as "load", or when using EPS
objects defined from PostScript source.
Example:
$p = new PostScript::Simple();
$e = new PostScript::Simple::EPS(file => "test.eps");
$e->preload($p);
BUGS
This is software in development; some current functionality may not be
as expected, and/or may not work correctly.
AUTHOR
The PostScript::Simple::EPS module was written by Matthew Newton, after
prods for such a feature from several people around the world. A useful
importeps function that provides scaling and aspect ratio operations
was gratefully received from Glen Harris, and merged into this module.
Copyright (C) 2002-2003 Matthew C. Newton / Newton Computing
This program 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, version 2.
This program 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, available at
http://www.gnu.org/licenses/gpl.html.
SEE ALSO
PostScript::Simple
perl v5.18.1 2005-03-03 PostScript::Simple::EPS(3)
