Free true colors software for linux

Alegre colors 1.0 is yet another excellent addition for Gnome users. It is actually a specific theme for ubuntu desktop.

Imager::Color is a Perl module with color handling for Imager.

SYNOPSIS

$color = Imager::Color->new($red, $green, $blue);
$color = Imager::Color->new($red, $green, $blue, $alpha);
$color = Imager::Color->new("#C0C0FF"); # html color specification

$color->set($red, $green, $blue);
$color->set($red, $green, $blue, $alpha);
$color->set("#C0C0FF"); # html color specification

($red, $green, $blue, $alpha) = $color->rgba();
@hsv = $color->hsv(); # not implemented but proposed

$color->info();

if ($color->equals(other=>$other_color)) {
...
}

This module handles creating color objects used by imager. The idea is that in the future this module will be able to handle colorspace calculations as well.

new

This creates a color object to pass to functions that need a color argument.

set

This changes an already defined color. Note that this does not affect any places where the color has been used previously.

rgba

This returns the rgba code of the color the object contains.

info

Calling info merely dumps the relevant colorcode to the log.

equals(other=>$other_color)
equals(other=>$other_color, ignore_alpha=>1)

Compares $self and color $other_color returning true if the color components are the same.

Compares all four channels unless ignore_alpha is set. If ignore_alpha is set only the first three channels are compared.

You can specify colors in several different ways, you can just supply simple values:
simple numeric parameters - if you supply 3 or 4 numeric arguments, you get a color made up of those RGB (and possibly A) components.

a six hex digit web color, either RRGGBB or #RRGGBB
an eight hex digit web color, either RRGGBBAA or #RRGGBBAA.
a 3 hex digit web color, #RGB - a value of F becomes 255.
a color name, from whichever of the gimp Named_Colors file or X rgb.txt is found first. The same as using the name keyword.

You can supply named parameters:

red, green and blue, optionally shortened to r, g and b. The color components in the range 0 to 255.

# all of the following are equivalent
my $c1 = Imager::Color->new(red=>100, blue=>255, green=>0);
my $c2 = Imager::Color->new(r=>100, b=>255, g=>0);
my $c3 = Imager::Color->new(r=>100, blue=>255, g=>0);
hue, saturation and value, optionally shortened to h, s and v, to specify a HSV color. 0 new(hue=>120, value=>1, saturation=>0.5);
web, which can specify a 6 or 3 hex digit web color, in any of the forms #RRGGBB, #RGB, RRGGBB or RGB.
my $c1 = Imager::Color->new(web=>#FFC0C0); # pale red
gray or grey which specifies a single channel, from 0 to 255.
# exactly the same
my $c1 = Imager::Color->new(gray=>128);
my $c1 = Imager::Color->new(grey=>128);
rgb which takes a 3 member arrayref, containing each of the red, green and blue values.
# the same
my $c1 = Imager::Color->new(rgb=>[255, 100, 0]);
my $c1 = Imager::Color->new(r=>255, g=>100, b=>0);
hsv which takes a 3 member arrayref, containting each of hue, saturation and value.
# the same
my $c1 = Imager::Color->new(hsv=>[120, 0.5, 1]);
my $c1 = Imager::Color->new(hue=>120, v=>1, s=>0.5);

gimp which specifies a color from a GIMP palette file. You can specify the filename of the palette file with the palette parameter, or let Imager::Color look in various places, typically "$HOME/gimp-1.x/palettes/Named_Colors" with and without the version number, and in /usr/share/gimp/palettes/. The palette file must have color names.

my $c1 = Imager::Color->new(gimp=>snow);
my $c1 = Imager::Color->new(gimp=>snow, palette=>testimg/test_gimp_pal);

xname which specifies a color from an X11 rgb.txt file. You can specify the filename of the rgb.txt file with the palette parameter, or let Imager::Color look in various places, typically /usr/lib/X11/rgb.txt.

my $c1 = Imager::Color->new(xname=>blue) # usually RGB(0, 0, 255)

builtin which specifies a color from the built-in color table in Imager::Color::Table. The colors in this module are the same as the default X11 rgb.txt file.

my $c1 = Imager::Color->new(builtin=>black) # always RGB(0, 0, 0)

name which specifies a name from either a GIMP palette, an X rgb.txt file or the built-in color table, whichever is found first.

channel0, channel1, etc, each of which specifies a single channel. These can be abbreviated to c0, c1 etc.

channels which takes an arrayref of the channel values.

Optionally you can add an alpha channel to a color with the alpha or a parameter.

These color specifications can be used for both constructing new colors with the new() method and modifying existing colors with the set() method.

Color::Fade provides a Perl extension for fading text colors.

Color::Fade uses mathematical formulas to take an input string of virtually any length, and virtually any number of colors, and assign an individual color to each character to fade between each of the input colors.

In other words, it makes your sentences look really pretty.

Methods

Fade $string among the colors in @colors, where $string is a string of length greater than zero, and @colors is an array of colors in six byte hexadecimal format, with or without the leading octothorpe. @colors must have at least two elements.

When called in array context, the method returns an array in which each element is of the format:

y

For each character, where xxxxxx is a hexadecimal color code and y is one character from the original string.

When called in scalar context, this array is joined before being returned.

Brick::Composers Perl module defines composing functions in the Brick::Constraints package. Each function takes a list of code refs and returns a single code ref that wraps all of them. The single code ref returns true or false (but defined), as with other constraints.

If a composer cannot create the single code ref (for instance, due to bad input) it returns undef of the empty list, indicating a failure in programming rather than a failure of the data to validate.

__and( LIST OF CODEREFS )
__compose_satisfy_all( LIST OF CODEREFS )

This is AND with NO short-circuiting.

( A && B && C )

This function creates a new constraint that returns true if all of its constraints return true. All constraints are checked so there is no short-circuiting. This allows you to get back all of the errors at once.

__or( LIST OF CODEREFS )
__compose_satisfy_any( LIST OF CODEREFS )

This is OR but with NO short-circuiting.

( A || B || C )

This function creates a new constraint that returns true if all of its constraints return true. All constraints are checked so there is no short-circuiting.

__none( LIST OF CODEREFS )
__compose_satisfy_none( LIST OF CODEREFS )

( NOT A && NOT B && NOT C )

NOT ( A || B || C )

This function creates a new constraint that returns true if all of its constraints return false. All constraints are checked so there is no short-circuiting.

__compose_satisfy_N( SCALAR, LIST OF CODEREFS )

This function creates a new constraint that returns true if exactly N of its constraints return true. All constraints are checked so there is no short-circuiting.

__compose_satisfy_N_to_M( LIST OF CODEREFS )

This function creates a new constraint that returns true if between N and M (inclusive) of its constraints return true. All constraints are checked so there is no short-circuiting.

__not( CODEREF )
__compose_not( CODEREF )

This composers negates the sense of the code ref. If the code ref returns true, this composer makes it false, and vice versa.

__compose_until_pass
__compose_pass_or_skip

Go through the list of closures, trying each one until one suceeds. If a closure doesnt die, but doesnt return true, this doesnt fail but just moves on. Return true for the first one that passes, short-circuited the rest. If none of the closures pass, die with an error noting that nothing passed.

If one of the subs dies, this composer still dies.
This can still die for programming (not logic) errors.

__compose_until_fail
__compose_pass_or_stop

Keep going as long as the closures return true.

The closure that returns undef is a selector.

If a closure doesnt die and doesnt dont fail, just move on. Return true for the first one that passes, short-circuited the rest. If none of the closures pass, die with an error noting that nothing passed.

This can still die for programming (not logic) errors.

$result $@ what action
------------------------------------------------------------
1 undef passed go on to next brick

undef undef selector stop, return undef, no die
failed

undef string program stop, die with string
error

undef ref validator stop, die with ref
failed

Resistor Color Code Calculator project calculates the value of a resistor (an electronic component).

The colors on the resistor are input into the program, and the result displays the resistance value of the resistor.

This is much easier than memorizing rhymes to remember colors.

Tom the Tomato is a clone of Rainbow inslands.
Tom must jump higher and higher to survive. Graphic is simple - hand draw.
Enhancements:
- Higher RESOLUTION (320x240 Pixel instead of 256x192!)
- More COLORS (Full 8-bit mode, 262144 color palette instead of 256 colors!)
- More NOISE (New 8-bit square-wave generator! [replaced with a sample in 2.01])
- True programmers` art GRAPHICS (...!)
- True programmers` art MUSIC (turn off speakers!)
- Bounding box COLLISION (with big bounding boxes!)
- 4-way SCROLLING (and simulated 8-way scrolling!)
- 10 LEVELS (hard to beat!)
- unique TILES in every level (with transparent background!)
- 4 unique ENEMIES (animated!)
- 1 PARTICLE effect (rain drops!)
- 1 SPECIAL EFFECT (tainted sprites in water!)
- 1 SOUND effect (might interfere with music though [not anymore in 2.01]!)
- RECORD/PLAYBACK possibilities (9 demo recordings included!)
- Unlimited RESTARTS (instead of load/save cheating!)
- CHEAT CODE (skip levels by pressing IDLEV times during ready screen!)
- Full C++ SOURCE CODE provided (somewhat obfuscated, and protected by GPL!)
- Uses the ALLEGRO library (therefore running on lots of platforms!)
- Uses DUMB for music playback (as of version 2.01!)