Free graphics programs software for linux

fid-graphics project is a simple toolkit for the Frigand Imperial Desktop.
It is probably the easiest toolkit to write a display engine for, but it does not support any widgets.
Enhancements:
- src/Desktop/Fid/Window.lhs (displayWaitRedisplay): New function.
- (requestRedisplay): Tidy up.
- src/Desktop/Fid/Main.lhs (data WinCapLine): New type.
- (data WindowType): Use it.
- (&&*, ||*, isnt, haveEnvVar, haveOpt): Deleted.
- (lookupFeature, lookupProtocol, lookupKeywords): New functions.
- (windowTypes): Use WindowCapLine.
- (forkProcess): Unused; deleted.
- (data FidOpt): Unused; deleted.
- (fidMain): Dont consider forking.
- Only call getOpt to sort out verbose options.
- src/Desktop/Fid/Control.lhs (PrimKey): New type.
- (instance Eq PrimKey, instance Ord PrimKey)
- (instance Show PrimKey, instance Arbitrary PrimKey): Instances for t.
- (data Key): Use it.
- (charKey, control, keyToChar): Do the right thing with PrimKey.
- (symbolKey): New function.
- (instance Arbitrary Key): Use instance Arbitrary PrimKey.
- (instance Arbitrary Char): New Instance.

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

Apache XML Graphics Commons project is a library that consists of several reusable components used by Apache Batik and Apache FOP.
Many of these components can easily be used separately outside the domains of SVG and XSL-FO. You will find components such as a PDF library, an RTF library, Graphics2D implementations that let you generate PDF & PostScript files, and much more.
Apache XML Graphics Commons has only just begun. Its in the process of being populated with components coming from Apache Batik and Apache FOP. Stay tuned for exciting treasures made available.
In the Wiki, we have a plan for building Apache XML Graphics Commons. The plan provides an idea of what you can expect to find here when were finished migrating components.
Main features:
- Image codecs for PNG and TIFF
- Bitmap image writer abstraction with implementation for the above codecs and for the Image I/O API.
- Java2D helper classes
- Graphics2D implementation that produces PostScript and EPS
- Helper classes for PostScript code production
- XMP metadata framework
- Various I/O classes, encoders and decoders for various formats
Enhancements:
- The ImageWriter abstraction now supports the writing of multi-page formats like TIFF.
- This uses the Image I/O API. A default implementation was provided for AbstractGraphics2D.drawText(ACI, float, float) so that PSGraphics2D supports painting of text using the AttributedCharacterIterator.
- Various fixes and improvements were made in the ImageWriter abstraction.
- A problem where the generation of the PostScript setdash command was assuming that only integer values can be used was fixed.

Text::Graphics is a text graphics rendering toolkit.

This is a toolkit for rendering plain text via an API like that used for graphics rendering in GUI toolkits. This package might be used when you want to do sophisticated rendering of plain text, e.g., for graphing, creating of complex forms for email and fax, and so on.

SYNOPSIS

use Text::Graphics;
my $text = "A text graphics rendering toolkit.n";
my $page = Text::Graphics::Page->new( 20, 10);
my $panel0 = Text::Graphics::BorderedPanel->new( 20, 10);
my $panel1 =
Text::Graphics::FilledBorderedTextPanel->new($text x 3, 25, 12);
$panel0->setBackground("#");
$panel1->setBackground(" ");
$page->add($panel0);
$page->add($panel1, 5, 2);
$page->render();

+-------------------+
|###################|
|####+--------------+
|####|A text graphic|
|####|rendering tool|
|####|text graphics |
|####|toolkit. A tex|
|####|graphics rende|
|####|toolkit. |
|####| |
+----+--------------+

Ump is a program in which all sorts of calculations can be done, from the simplest to the more advanced. It handles complex numbers and matrices of those.

The complex numbers are built up by either floating point values or ratios of arbitrary sized integers. Ump also draws graphs, ordinary, polar, and parameter, which is done through an easy to use user interface.

Unnamed Math Program is also possible to write your own functions using the built in editor.

Graphics::ColorObject can convert between color spaces.

SYNOPSIS

use Graphics::ColorObject;

# rgb to hsv
$color = Graphics::ColorObject->new_RGB([$r, $g, $b]);
($h, $s, $v) = @{ $color->as_HSV() };

# one rgb space to another (NTSC to PAL)
$color = Graphics::ColorObject->new_RGB([$r, $g, $b], space=>NTSC);
($r, $g, $b) = @{ $color->as_RGB(space=>PAL) };

ABSTRACT

Use this module to convert between all the common color spaces. As a pure Perl module, it is not very fast, and so it you want to convert entire images quickly, this is probably not what you want. The emphasis is on completeness and accurate conversion.
Supported color spaces are: RGB (including sRGB, Apple, Adobe, CIE Rec 601, CIE Rec 709, CIE ITU, and about a dozen other RGB spaces), CMY, CMYK, HSL, HSV, XYZ, xyY, Lab, LCHab, Luv, LCHuv, YPbPr, YCbCr, YUV, YIQ, PhotoYCC.
Conversion between different RGB working spaces, and between different white-points, is fully supported.

For any supported color space XXX, there is one constructor new_XXX that creates a color using data in that color space, and one method as_XXX that returns the current color as expressed in that color space. For example, for RGB there is new_RGB and as_RGB. The color data is always passed as an array reference to a three-element array (four-element in the case of CMYK). Thus, to convert from RGB to HSL, you can use:

$color = Graphics::ColorObject->new_RGB([$r, $g, $b]);
($h, $s, $l) = @{ $color->as_HSL() };

The constructor can always take a hash of optional arguments in addition to the color value, namely the working RGB space and the white point. For example:

$color = Graphics::ColorObject->new_RGB([$r, $g, $b], space=>Adobe, white_point=>D65);

For a list of all supported color spaces, call Graphics::ColorObject->list_colorspaces(). For a list of all RGB working spaces and of all white points that this module supports, call Graphics::ColorObject->list_rgb_spaces() and Graphics::ColorObject->list_white_points().
If not specified, the working RGB space will be sRGB. Many non-RGB conversions also rely on an implicit RGB space, and passing an RGB space as an option (either to the constructor or later) will have an effect on the values.

PDL::Graphics::LUT is a Perl module that provides access to a number of look-up tables.

SYNOPSIS

use PDL::Graphics::PGPLOT;
use PDL::Graphics::LUT;

# what tables are available
my @tables = lut_names();

# get the reversed colour table smooth,
# with the gamma intensity ramp
my ( $l, $r, $g, $b ) = lut_data( smooth, 1, gamma );

# use the table idl5 in ctab
ctab( lut_data(idl5) );

PDL::Graphics::LUT contains a number of colour look-up tables (in rgb format) and intensity ramps, and provides routines to access this data. The format of the data is suitable for use by "ctab" in PDL::Graphics::PGPLOT.

Unlike the initial release of the package, the data tables are now stored within the PDL distribution (see $tabledir and $rampdir) rather than in the module itself. Changes to these directories will be picked up on the next call to one of the package functions.

PDL::Graphics::TriD is a PDL 3D interface.

SYNOPSIS

use PDL::Graphics::TriD;

# After each graph, let the user rotate is and # wait for him to press q, then make new graph line3d($coords); # $coords = (3,n,...) line3d($coords,$colors); # $colors = (3,n,...) line3d([$x,$y,$z]); imagrgb([$r,$g,$b]); lattice3d([$x,$y,$z]); # 2-d piddles points3d([$x,$y,$z]);
hold3d(); # the following graphs are on top of each other and the previous line3d([$x,$y,$z]); line3d([$x,$y,$z+1]); $pic = grabpic3d(); # Returns the picture in a (3,$x,$y) float piddle (0..1).
release3d(); # the next graph will again wipe out things.

WARNING

These modules are still in a somewhat unfocused state: dont use them yet if you dont know how to make them work if they happen to do something strange.

This module implements a generic 3D plotting interface for PDL. Points, lines and surfaces (among other objects) are supported.

With OpenGL, it is easy to manipulate the resulting 3D objects with the mouse in real time - this helps data visualization a lot.