Free graphics display software for linux

Gd is a graphics library. It allows your code to quickly draw images complete with lines, arcs, text, multiple colors, cut and paste from other images, and flood fills, and write out the result as a PNG or JPEG file. This is particularly useful in World Wide Web applications, where PNG and JPEG are two of the formats accepted for inline images by most browsers.

In gd 1.0, it stood for "gif draw." After the Unisys patent on the LZW compression used in GIF came to light and GIF support was dropped, it did not officially stand for anything, but lets just say "graphics draw" and leave it at that. (GIF support is back, thanks to the expiration of the patent, but gd can draw much more than GIFs.)

This is a quick install guide:

1. Type ./configure
2. Type make install

Relations::Display is a DBI/DBD::mysql Query Graphing Perl module.

SYNOPSIS

# DBI, Relations::Display Script that creates a
# matrix, table, and graph from a query.

use DBI;
use Relations;
use Relations::Query;
use Relations::Abstract;
use Relations::Display;

$dsn = "DBI:mysql:watcher";

$username = "root";
$password = ;

$dbh = DBI->connect($dsn,$username,$password,{PrintError => 1, RaiseError => 0});

$abstract = new Relations::Abstract($dbh);

$display = new Relations::Display(-abstract => $abstract,
-query => {-select => {total => "count(*)",
first => "Bird",
second => "Count",
third => "if(gender=Male,Boy,Girl)",
tao => "if(gender=Male,Yang,Yin)",
sex => "gender",
kind => "sp_name",
id => "species.sp_id",
fourth => "(species.sp_id+50)",
vert => "2",
horiz => "1.5"},
-from => [bird,species],
-where => [species.sp_id=bird.sp_id,
species.sp_id < 4],
-group_by => [sp_name,gender,first,second],
-order_by => [gender,sp_name]},
-x_axis => first,kind,id,fourth,
-legend => second,third,tao,sex,vert,horiz,
-y_axis => total,
-hide => fourth,third,vert,horiz,
-vertical => vert,
-horizontal => horiz);

$matrix = $display->get_matrix();

$table = $display->get_table();

$display->set(-chart => bars,
-width => 400,
-height => 400,
-settings => {y_min_value => 0,
y_max_value => 3,
y_tick_number => 3,
transparent => 0}
);

$gph = $display->get_graph();

$gd = $gph->gd();

open(IMG, >test.png) or die $!;
binmode IMG;
print IMG $gd->png;

$dbh->disconnect();

Apache::WeSQL::Display is a library of functions to create web-pages based on a Journalled SQL database.

SYNOPSIS

use Apache::WeSQL::Display qw( :all );

This module contains the functions necessary to deal with the jform.wsql, jdetails.wsql, and jlist.wsql web calls. These calls read their configuration from the form.cf, details.cf, and list.cf files. Also, they use certain (see LAYOUT.CF below to know which) entries from the layout.cf file for the layout. The structure of the .cf files is outlined below.

.CF FILES

STRUCTURE

The .cf files (except for layout.cf, see below) have the following syntax:
< view-name >
< key >:< value >
< value_line2 >
< key >:< value >
< value_line2 >
< value_line3 >
...

< view-name >
< key >:< value >
...
Multi-line values are allowed as long as the extra lines begin with whitespace. Of course they can not be all whitespace, or they would be seen as a view separator!

PDL::Graphics::X is a PDL OO access to X windows.

SYNOPSIS

# example 1

use PDL;
use PDL::Graphics::X;

my $x_size = 255; my $y_size = 255;
my $win1 = PDL::Graphics::X->new({SIZE_X => $x_size, SIZE_Y => $y_size});
my $a = xvals(zeroes(byte,$x_size,$y_size));
$win1->imag($a);

# example 2

use PDL;
use PDL::Graphics::X;

my $win1 = PDL::Graphics::X->new({WIN_TITLE => "PDL", SIZE_X => 210, SIZE_Y => 210});
my $x = pdl(10, 100, 100, 10);
my $y = pdl(10, 10, 100, 100);
$win1->line($x, $y, {COLOR => [1,0,0], LINEWIDTH => 5});

This module interfaces PDL directly to X windows in a OO fashion. Each X object has an associated X window and handles opening, closing and drawing in the associated window. Hopefully it is reasonably intuitive to use. The vision is that this will serve as a base upon which other fully native PDL graphics modules could be built.

Common options such as LINEWIDTH are remembered from function call to function call, i.e. if you call $win1->line($x, $y, {COLOR => [1,0,0], LINEWIDTH => 5}) then the rectangle drawn by $win1->rect(10, 10, 190, 190) will also have a red border of width equal to 5.

FUNCTIONS

new

Constructor for a new X window object.

Usage: my $win1 = PDL::Graphics::X->new(); # open the window with the defaults
Usage: my $win1 = PDL::Graphics::X->new({WIN_TITLE => "PDL", SIZE_X => 210, SIZE_Y => 210});

Creates a new X object & its associated X window.

Options recognized :

SIZE_X - window x size in pixels (default = 400)
SIZE_Y - window y size in pixels (default = 300)
WIN_TITLE - A title for the window, if desired (default = "X")
BACK_COLOR - [r, g, b] the windows background color (default = [1.0, 1.0, 1.0], i.e. white)
imag

Display a PDL as a bitmap.

Usage: $win1->imag($my_img); # display an image with default size and scaling
Usage: $win1->imag($my_img, {AUTO_SCALE => 1.0}); # display an auto-scaled image

Displays a PDL as a bitmap. The PDL can be of size either (m,n) or (m,n,3). PDLs of size (m,n) are converted to indexed color based on the current color table (see ctab). PDLs of size (m,n,3) are displayed as true-color images with the last dimension specifying the color (RGB). Unless a re-scaling is specified, the minimum value displayed is 0.0 and the maximum is 255.0. If the PDL is larger then the window then the window will be re-scaled to accomodate the PDL;

Options recognized :

DEST_X - position of the left side of the bitmap in pixels (default = 0)
DEST_Y - position of the bottom of the bitmap in pixels (default = 0)
DEST_W - width of the bitmap to be displayed (default = width of the PDL)
DEST_H - height of the bitmap to be displayed (default = height of the PDL)
AUTO_SCALE - if set equal to 1, the PDL will be rescaled such that its
minimum value is 1 and its max is 255 (default = 0)
MIN - the minimum value to be displayed (default = 0.0)
MAX - the maximum value to be displayed (default = 255.0)
ctab

Set the color table

Usage: $win1->ctab(cat(lut_data(idl5))); # set the color table to idl5

Makes a local copy of a user supplied color table. The color table must be a 256 x 4 pdl of the form (l,r,g,b), as would be generated by the command $ct = cat(lut_data("xyz")). The l value is ignored. The r, g and b values should be in the range 0.0 - 1.0.

line

Draws a vector as connected points.

Usage: $win1->line($x, $y, {COLOR => [0,0,0], LINEWIDTH => 5}); # draw black line of width 5

Draw a poly-line between a set of points given by two PDLs of size (n). The first PDL gives the x position & the second piddle gives the y position of the individual points, n is the total number of points.

Options recognized

LINEWIDTH - line width
LINESTYLE - line style (0 = normal, 1 = dashed)
COLOR - [r, g, b] color of the line
rect

Draws a rectangle.

Usage: $win1->rect($x1, $y1, $x2, $y2);

Draws a rectangle with corners at ($x1, $y1) and ($x2, $y2).

Options recognized

LINEWIDTH - line width
LINESTYLE - line style (0 = normal, 1 = dashed)
COLOR - [r, g, b] color of the line
circle

Draws a circle.

Usage: $win1->circle($x, $y, $r);

Draws a circle centered at ($x, $y) with radius $r.

Options recognized

LINEWIDTH - line width
LINESTYLE - line style (0 = normal, 1 = dashed)
COLOR - [r, g, b] color of the line
ellipse

Draws an oval.

Usage: $win1->ellipse($x, $y, $a, $b);

Draws a oval centered at ($x, $y) with x size $a and y size $b.

Options recognized

LINEWIDTH - line width
LINESTYLE - line style (0 = normal, 1 = dashed)
COLOR - [r, g, b] color of the line
erase

Erases the contents of the window.

Usage: $win1->erase();

Resets the contents of the window to the background color.

text

Draw text

Usage: $win1->text("hello", $x, $y, $angle);

Draws text starting at $x and $y with baseline angle given by $angle. If you know how to draw truly rotated text in X, please let me know. How fonts are currently dealt with is imperfect at best. So that the font size can easily be changed, a search is performed for a scalable font with specified font name. If such a font cannot be found then the text will be displayed with the default X font and no font scaling.

Options recognized

FONT_NAME - name of the font family (default = "courier")
CHARSIZE - desired font size in points
COLOR - [r, g, b] color of the font

cursor

Returns the location of next mouse click in the window

Usage : my($x,$y) = $win1->cursor();

Returns the x & y locations of the next mouse click in the window.

we_exist

Returns 0 if the window still exists, 1 if it does not

Usage : my $exists = $win1->we_exist();

Originally written to help debug some problems with associated with X windows being closed by the user with a mouse. Preserved on the off chance that it will be useful to a dependent module.

winsize

Returns the window size & maximum window size (in pixels) in x and y

Usage : my ($win_x, $win_y, $max_x, $max_y) = $win1->winsize();

Primarily intended for use by dependent modules that might want to know what the current and maximum window size is.

resize

resizes a window & returns the new size (which might not be what you requested)

Usage : my ($new_x, $new_y) = $win1->resize($size_x, $size_y);

Primarily intended for use by dependent modules that might want to resize a window without destroying it and creating another one.

Bio::Graphics::Glyph::cds module contains the "cds" glyph.

SYNOPSIS

See L< Bio::Graphics::Panel > and L< Bio::Graphics::Glyph >.

This glyph draws features that are associated with a protein coding region. At high magnifications, draws a series of boxes that are color-coded to indicate the frame in which the translation occurs. At low magnifications, draws the amino acid sequence of the resulting protein. Amino acids that are created by a splice are optionally shown in a distinctive color.

OPTIONS

The following options are standard among all Glyphs. See Bio::Graphics::Glyph for a full explanation.

Option Description Default
------ ----------- -------

-fgcolor Foreground color black

-outlinecolor Synonym for -fgcolor

-bgcolor Background color turquoise

-fillcolor Synonym for -bgcolor

-linewidth Line width 1

-height Height of glyph 10

-font Glyph font gdSmallFont

-connector Connector type 0 (false)

-connector_color
Connector color black

-label Whether to draw a label 0 (false)

-description Whether to draw a description 0 (false)

-strand_arrow Whether to indicate 0 (false)
strandedness

-hilite Highlight color undef (no color)
In addition, the alignment glyph recognizes the following glyph-specific options:
Option Description Default
------ ----------- -------

-frame0f Color for first (+) frame background color

-frame1f Color for second (+) frame background color

-frame2f Color for third (+) frame background color

-frame0r Color for first (-) frame background color

-frame1r Color for second (-) frame background color

-frame2r Color for third (-) frame background color

-gridcolor Color for the "staff" lightslategray

-sixframe Draw a six-frame staff 0 (false; usually draws 3 frame)

-require_subparts
Dont draw the reading frame 0 (false)
unless it is a feature
subpart.

-codontable Codon table to use 1 (see Bio::Tools::CodonTable)

The -require_subparts option is suggested when rendering spliced transcripts which contain multiple CDS subparts. Otherwise, the glyph will hickup when zoomed way down onto an intron between two CDSs (a phantom reading frame will appear). For unspliced sequences, do *not* use -require_subparts.

Graphics::ColorUtils Perl module is an easy-to-use color space conversions and more.

SYNOPSIS

use Graphics::ColorUtils;

( $y, $i, $q ) = rgb2yiq( $r, $g, $b );
( $r, $g, $b ) = yiq2rgb( $y, $i, $q );
$hex_string = yiq2rgb( $y, $i, $q );

( $c, $m, $y ) = rgb2cmy( $r, $g, $b );
( $r, $g, $b ) = cmy2rgb( $c, $m, $y );
$hex_string = cmy2rgb( $c, $m, $y );

( $h, $l, $s ) = rgb2hls( $r, $g, $b );
( $r, $g, $b ) = hls2rgb( $h, $l, $s );
$hex_string = hls2rgb( $h, $l, $s );

( $h, $s, $v ) = rgb2hsv( $r, $g, $b );
( $r, $g, $b ) = hsv2rgb( $h, $s, $v );
$hex_string = hsv2rgb( $h, $s, $v );

# -----

use Graphics::ColorUtils qw( :gradients );

( $r, $g, $b ) = grad2rgb( $name, $f ); # where 0.0 colorAllocate( hsv2rgb( 270, 0.5, 0.3 ) );.)

Features:

Color Space Conversions
Color space conversions, in particular between the "intuitive" color spaces HSV (Hue/Saturation/Value) and HLS (Hue/Lightness/Saturation) to and from RGB (Red/Green/Blue).
Color Lookup
Color lookup by name for three standard sets of colors: WWW/CSS, SVG, and X11.
Color Gradients
Management of color gradients, which can be indexed by a floating point number in the range 0..1. (Mostly intended for false-color data visualization.)

Linux graphical bootsplash allows you to use custom graphics during early system startup. It makes it possible to place a nice graphic behind or above the kernel boot messages.
Linux graphical bootsplash hooks into the fbcon layer and, if activated, searches the initial ramdisk for a JPEG picture to show.
On any output operations to the console, it takes care of painting a margin around your text and a background picture behind the text with a set of special cfb functions.
Main features:
- Nice graphics (JPEG)
- Antialiased text rendering (TrueType)
- Animations (MNG)
- Progress Bar
- Display of boot messages above or below a graphic. ("verbose" and "silent" modes)
- Fully themeable
Enhancements:
- The bootsplash patch was updated to apply cleanly against Linux kernel 2.6.21.