Package qupath.lib.color

Class ColorToolsAwt

java.lang.Object

qupath.lib.color.ColorToolsAwt

public class ColorToolsAwt
extends Object

Helper class for converting between packed RGB colors and Java's AWT representation, as well as creating some ColorModels for BufferedImages.

Author:

Pete Bankhead

Field Summary

Fields

Modifier and Type	Field	Description
static final Color	TRANSLUCENT_BLACK	Black, with 50% opacity.
static final Color	TRANSLUCENT_WHITE	White, with 50% opacity.

Constructor Summary

Constructors

Constructor	Description
ColorToolsAwt()

Method Summary

Modifier and Type	Method	Description
static IndexColorModel	createIndexColorModel(int red, int green, int blue, boolean whiteBackground)	Get an IndexColorModel representing a linear LUT based on a RGB color.
static Color	darkenColor(Color color)	Get a (slightly) darker version of the specified color.
static Color	getCachedColor(int r, int g, int b)	Get a Color object, possibly from a shared map (used to avoid creating too many objects unnecessarily).
static Color	getCachedColor(int r, int g, int b, int a)	Get a Color object, possibly from a shared map (used to avoid creating too many objects unnecessarily).
static Color	getCachedColor(Integer rgb)	Get cached color.
static Color	getCachedColor(Integer rgb, boolean hasAlpha)	Get cached color, explicitly stating whether alpha should be included or not.
static Color	getColorWithOpacity(Color color, double opacity)	Get a color with a specified opacity, setting the alpha channel accordingly.
static Color	getColorWithOpacity(Integer rgb, double opacity)	Get a color with a specified opacity, based on the packed RGB values in an Integer.
static IndexColorModel	getIndexColorModel(StainVector stain)	Create an IndexColorModel, ranging from white (low values) to a stain vector color (high values).
static IndexColorModel	getIndexColorModel(StainVector stain, boolean whiteBackground)	Get an IndexColorModel representing a color deconvolution stain.
static Color	getMoreTranslucentColor(Color color)	Get a (slightly more) translucent version of the specified color.
static Color	getTranslucentColor(Color color)	Get a (slightly) translucent version of the specified color.
static Color	scaleColor(Color color, double factor)	Get a scaled version of the specified color, where the RGB values are independently scaled by a specified factor.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

TRANSLUCENT_WHITE

public static final Color TRANSLUCENT_WHITE

White, with 50% opacity.

TRANSLUCENT_BLACK

public static final Color TRANSLUCENT_BLACK

Black, with 50% opacity.

Constructor Details

ColorToolsAwt

public ColorToolsAwt()

Method Details

getCachedColor

public static Color getCachedColor(int r,
 int g,
 int b,
 int a)

Get a Color object, possibly from a shared map (used to avoid creating too many objects unnecessarily).

Parameters:

r -

g -

b -

a -

Returns:

getCachedColor

public static Color getCachedColor(int r,
 int g,
 int b)

Get a Color object, possibly from a shared map (used to avoid creating too many objects unnecessarily).

Parameters:

r -

g -

b -

Returns:

getCachedColor

public static Color getCachedColor(Integer rgb)

Get cached color. Assumed not to have alpha set, unless the relevant bits are non-zero.

Parameters:

rgb -

Returns:

getCachedColor

public static Color getCachedColor(Integer rgb,
 boolean hasAlpha)

Get cached color, explicitly stating whether alpha should be included or not.

Parameters:

rgb -

hasAlpha -

Returns:

getIndexColorModel

public static IndexColorModel getIndexColorModel(StainVector stain,
 boolean whiteBackground)

Get an IndexColorModel representing a color deconvolution stain. The color is just an approximation for visualization purposes, it does not perfectly match the stain itself.

Parameters:

stain - the stain to use

whiteBackground - if true, the color model will have a white background; if false, it will have a black background

Returns:

createIndexColorModel

public static IndexColorModel createIndexColorModel(int red,
 int green,
 int blue,
 boolean whiteBackground)

Get an IndexColorModel representing a linear LUT based on a RGB color.

Parameters:

red - the red value of the color for the maximum value

green - the green value of the color for the maximum value

blue - the blue value of the color for the maximum value

whiteBackground - if true, the color model will have a white background; if false, it will have a black background

Returns:

getIndexColorModel

public static IndexColorModel getIndexColorModel(StainVector stain)

Create an IndexColorModel, ranging from white (low values) to a stain vector color (high values).

Parameters:

stain -

Returns:

getMoreTranslucentColor

public static Color getMoreTranslucentColor(Color color)

Get a (slightly more) translucent version of the specified color.

If possible, a cached version will be used.

Parameters:

color -

Returns:

See Also:

• getTranslucentColor(java.awt.Color)

darkenColor

public static Color darkenColor(Color color)

Get a (slightly) darker version of the specified color.

If possible, a cached version will be used.

Parameters:

color -

Returns:

getTranslucentColor

public static Color getTranslucentColor(Color color)

Get a (slightly) translucent version of the specified color.

If possible, a cached version will be used.

Parameters:

color -

Returns:

scaleColor

public static Color scaleColor(Color color,
 double factor)

Get a scaled version of the specified color, where the RGB values are independently scaled by a specified factor.

The alpha value is preserved unchanged.

Parameters:

color -

factor -

Returns:

getColorWithOpacity

public static Color getColorWithOpacity(Integer rgb,
 double opacity)

Get a color with a specified opacity, based on the packed RGB values in an Integer.

Parameters:

rgb -

opacity -

Returns:

getColorWithOpacity

public static Color getColorWithOpacity(Color color,
 double opacity)

Get a color with a specified opacity, setting the alpha channel accordingly.

Parameters:

color -

opacity -

Returns: