Provided by: libg20-perl_0.72-5_amd64 
NAME
G2 - A simple graphics library ported to Perl.
SYNOPSIS
use G2;
$dev1 = newX11 G2::Device(775, 575);
$dev2 = newGD G2::Device("test.png",600,200);
$dev1->rectangle(20,20,150,150);
$dev1->circle(100,150,60);
$dev2->circle(100,150,60);
$dev2->string(100,50,"A circle in a PNG file");
DESCRIPTION
g2 is a simple to use graphics library for 2D graphical applications. This library
provides a comprehensive set of functions for simultaneous generation of graphical output
on different types of devices. Presently, following devices are currently supported by
g2: X11, PNG, PostScript (xfig is in developement). One major feature of the g2_library
is the concept of virtual devices. An arbitrary number of physical devices (such as PNG,
or X11) can be grouped to create a so-called virtual device. Commands sent to such a
virtual devices will automatically issued to all attached physical devices. This allows
for example simultaneous output to a PNG file and a Postscript file. A virtual device in
turn can be attached to another virtual device, allowing to construct trees of devices.
Virtual devices can also be useful when using different user-coordinate systems. E.g. one
X11 window showing an overview of a graphical output, and a second window showing a zoom
of a more detailed area of the graphic. Drawing in both windows is performed by one
single command to the virtual device. Please see g2 documentation (C interface) for up to
date version.
Exported constants
G2LD
G2_H
G2_VERSION
Exported functions
Creating new devices
"newX11"
"G2::Device::newX11(width,height)" class method
opens an X11 window with width and height of X11 window given in pixels. returns : a
new X11 device.
"newPS"
"G2::Device::newPS(filename,paper,orientation)" class method
opens a new PostScript device. file_name: name of PostScript file paper: Paper size
(e.g. g2_A4, g2_Letter). See PostScript paper sizes for a full list of supported
sizes. orientation: paper orientation. Either g2_PS_land for landscape or g2_PS_port
for portrait returns : a new PostScript device.
"newGD"
"G2::Device::newGD(filename,width,height,type)" class method
open a new GD device width,height: width and height of the image in pixels filename:
name of the output file. type: file type, 0-jpeg, 1-png returns : a new GD device
"newVD"
"G2::Device::newVD()" class method
Create a new Virtual Device. An arbitrary number of physical devices (such as PNG,
or X11) can be grouped to create a so-called virtual device. Commands sent to such a
virtual devices will automatically issued to all attached physical devices. This
allows for example simultaneous output to a PNG file and a Postscript file. A virtual
device in turn can be attached to another virtual device, allowing to construct trees
of devices. Virtual devices can also be useful when using different user-coordinate
systems. E.g. one X11 window showing an overview of a graphical output, and a second
window showing a zoom of a more detailed area of the graphic. Drawing in both
windows is performed by one single command to the virtual device.
Device Functions
"" "G2::Device::attach(dev)" object method
"" "G2::Device::detach(dev)" object method
"" "G2::Device::close()" object method
"set_auto_flush"
"G2::Device::set_auto_flush(on_off)" object method
"flush"
"G2::Device::flush()" object method
"save"
"G2::Device::save()" object method
"set_coordinate_system"
"G2::Device::set_coordinate_system(x_origin, y_origin, x_mul, y_mul)" object method
"ld" "G2::Device::ld()" object method
"set_ld"
"G2::Device::set_ld( dev)" object method
"ink"
"G2::Device::ink( pd_dev, red, green, blue)" object method
"pen"
"G2::Device::pen(color)" object method
"set_dash"
"G2::Device::set_dash(N, *dashes)" object method
"set_font_size"
"G2::Device::set_font_size(size)" object method
"set_line_width"
G2::Device::set_line_width(w) object method
"clear_palette"
"G2::Device::clear_palette( dev)" object method
"reset_palette"
"G2::Device::reset_palette( dev)" object method
"allocate_basic_colors"
"G2::Device::allocate_basic_colors( dev)" object method
"clear"
"G2::Device::clear( dev)" object method
"set_background"
"G2::Device::set_background(color)" object method
Drawing Functions
"move"
"G2::Device::move(x, y)" object method
"move_r"
"G2::Device::move_r(dx, dy)" object method
"plot"
"G2::Device::plot(x, y)" object method
"plot_r"
"G2::Device::plot_r(dx, dy)" object method
"line"
"G2::Device::line(x1, y1, x2, y2)" object method
"line_r"
"G2::Device::line_r(dx, dy)" object method
"line_to"
"G2::Device::line_to(x, y)" object method
"poly_line"
"G2::Device::poly_line(N_pt, *pos)" object method
"triangle"
"G2::Device::triangle(x1, y1, x2, y2, x3, y3)" object method
"filled_triangle"
"G2::Device::filled_triangle(x1, y1, x2, y2, x3, y3)" object method
"rectangle"
"G2::Device::rectangle(x1, y1, x2, y2)" object method
"filled_rectangle"
"G2::Device::filled_rectangle(x1, y1, x2, y2)" object method
"polygon"
"G2::Device::polygon(N_pt, *pos)" object method
"filled_polygon"
"G2::Device::filled_polygon(N_pt, *pos)" object method
"circle"
"G2::Device::circle(x, y, r)" object method
"filled_circle"
"G2::Device::filled_circle(x, y, r)" object method
"ellipse"
"G2::Device::ellipse(x, y, r1, r2)" object method
Draw an ellipse on device dev
x,y: center point
r1,r2: x and y radius
"filled_ellipse"
"G2::Device::filled_ellipse(x, y, r1, r2)" object method
Draw a filled ellipse on device dev
x,y: center point
r1,r2: x and y radius
"arc"
"G2::Device::arc(x, y, r1, r2, a1, a2)" object method
Draw an arc with center point at (x,y), x and y radius given by r1,r2 and starting
and ending angle in radians a1,a2
"filled_arc"
"G2::Device::filled_arc(x, y, r1, r2, a1, a2)" object method
Draw a filled arc on device dev
x,y: center point
r1,r2: x and y radius
a1,a2: starting and ending angle in radians
"string"
"G2::Device::string(x, y, char *text)" object method
"" "G2::Device::set_QP(d, enum QPshape shape)" object method
"" "G2::Device::plot_QP(x, y)" object method
AUTHORS
Horst Wagner (wagner/users-sourceforge.net) and Ljubomir Milanovic
(ljubo/users-sourceforge-net)
COPYRIGHT
Copyright (C) 1998-2001 Ljubomir Milanovic & Horst Wagner This file is part of the g2
library
This library is free software; you can redistribute it and/or modify it under the terms of
the GNU Lesser General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this
library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA