Package rekall :: Package ui :: Module colors

Module colors

Various functions for handling colors. Used mainly for visualizing output of plugins with heatmaps (for now).

Most of the code below is made to match this color chart: http://en.wikipedia.org/wiki/File:Xterm_256color_chart.svg

The colorspace conversions are thin wrappers around colorsys, except for the code to handle XTerm colors, which is my own work.

Author: Adam Sindelar <adamsh@google.com>

Functions

ArbitraryStepFunction(value, steps)

source code

ChannelStepFunction(intensity)

source code

GreyscaleStepFunction(intensity)

source code

RGBToXTerm(red, green, blue)
Convert RGB values (0-255) to the closes XTerm color.

source code

XTermToRGB(xterm)
Convert the XTerm color (0-255) to an RGB equivalent.

source code

RGBToHSL(red, green, blue)

source code

RGBToYIQ(red, green, blue)

source code

HSLToRGB(hue, saturation, luminosity)

source code

YIQToRGB(y, i, q)

source code

YIQTextForBackground(y, i, q)
Compute the foreground color, given the background color.

source code

RGBTextForBackground(red, green, blue)
Compute the foreground color, given the background color.

source code

XTermTextForBackground(xterm)
Compute the foreground color, given the background color.

source code

BlendRGB(x, y, wx=1, wy=1)
Blend RGB colors x and y, optionally using assigned weights wx and wy.

source code

HeatToHSL(heat, greyscale=False)
Given heat (0-1.0), compute the color to represent it on a heatmap.

source code

HeatToRGB(heat, greyscale=False)

source code

HeatToXTerm(heat, greyscale=False)

source code

Variables
	XTERM16 = `((0, 0, 0), (128, 0, 0), (0, 128, 0), (128, 128, 0),...` XTerm has 16 special colors, as listed above.
	XTERM_CHANNEL_STEPS = `[0, 95, 135, 175, 215, 255]` XTerm color space is sparse at low luminosity.
	__package__ = `'rekall.ui'`

Function Details

Given heat (0-1.0), compute the color to represent it on a heatmap.

Arguments:
    Greyscale: If True, use luminosity instead of hue.

Variables Details

XTerm has 16 special colors, as listed above.

Value:

((0, 0, 0),
 (128, 0, 0),
 (0, 128, 0),
 (128, 128, 0),
 (0, 0, 128),
 (128, 0, 128),
 (0, 128, 128),
 (192, 192, 192),
...