java.lang.Object
- uk.ac.starlink.ttools.plot.Shaders

```
public class Shaders
extends java.lang.Object
```
Provides some implementations of the Shader interface.
Many other lookup tables are available. See for instance http://www.ncl.ucar.edu/Document/Graphics/color_table_gallery.shtml. The utility class LutSteal is available to help turn these into lut files that can be used here.

Since:

5 Jun 2007

Author:

Mark Taylor

Field Summary

Fields
Modifier and Type	Field	Description
`static Shader`	`BLACK_WHITE`	Interpolates between black (0) and white (1).
`static Shader`	`BREWER_BRBG`	ColorBrewer diverging brown-blue-green shader.
`static Shader`	`BREWER_BUGN`	ColorBrewer sequential blue-green shader.
`static Shader`	`BREWER_BUPU`	ColorBrewer sequential blue-purple shader.
`static Shader`	`BREWER_ORRD`	ColorBrewer sequential orange-red shader.
`static Shader`	`BREWER_PIYG`	ColorBrewer diverging pink-green shader.
`static Shader`	`BREWER_PUBU`	ColorBrewer sequential purple-blue shader.
`static Shader`	`BREWER_PURD`	ColorBrewer sequential purple-red shader.
`static Shader`	`BREWER_RDBU`	ColorBrewer diverging red-blue shader.
`static Shader`	`CUBEHELIX`	Standard cubehelix shader.
`static Shader`	`CUBEHELIX2`	Enhanced hue cubehelix shader.
`static Shader`	`CUBEHELIX3`	Lurid cubehelix shader.
`static Shader`	`CYAN_MAGENTA`	Interpolates between cyan (0) and magenta (1).
`static Shader`	`DFLT_GRID_SHADER`	Shader used by default for the transverse axis of non-absolute ramps.
`static Shader`	`FADE_BLACK`	Shader which interpolates between the base colour and black.
`static Shader`	`FADE_WHITE`	Shader which interpolates between the base colour and white.
`static Shader`	`FIX_BLUE`	Fixes blue level at parameter value.
`static Shader`	`FIX_GREEN`	Fixes green level at parameter value.
`static Shader`	`FIX_HUE`	Shader which fixes hue.
`static Shader`	`FIX_INTENSITY`	Shader which sets intensity.
`static Shader`	`FIX_RED`	Fixes red level at parameter value.
`static Shader`	`FIX_U`	Fixes U in YUV colour space.
`static Shader`	`FIX_V`	Fixes V in YUV colour space.
`static Shader`	`FIX_Y`	Fixes Y in YUV colour space.
`static Shader`	`HCL_POLAR`	Hue-chroma-luminance cyclic shader.
`static Shader`	`HSV_H`	Fixes H in HSV colour space.
`static Shader`	`HSV_S`	Fixes S in HSV colour space.
`static Shader`	`HSV_V`	Fixes V in HSV colour space.
`static Shader`	`LUT_ACCENT`	Shader based on lookup table Accent.
`static Shader`	`LUT_AIPS0`	Shader based on lookup table Aips0.
`static Shader`	`LUT_BACKGR`	Shader based on lookup table Backgr.
`static Shader`	`LUT_BRG`	Shader copied from Matplotlib BRG lookup table.
`static Shader`	`LUT_CIVIDIS`	Cividis shader derived from DOI:10.1371/journal.pone.0199239.
`static Shader`	`LUT_COLD`	Shader based on lookup table Cold.
`static Shader`	`LUT_COLOR`	Shader based on lookup table Color.
`static Shader`	`LUT_GLNEMO2`	Shader copied from glNemo2 application.
`static Shader`	`LUT_GNUPLOT`	Shader copied from Matplotlib Gnuplot lookup table.
`static Shader`	`LUT_GNUPLOT2`	Shader copied from Matplotlib Gnuplot2 lookup table.
`static Shader`	`LUT_HEAT`	Shader based on lookup table Heat.
`static Shader`	`LUT_HOTCOLD`	Diverging hot-cold shader provided by Daniel Michalik.
`static Shader`	`LUT_IDL2`	Shader based on lookup table IDL2.
`static Shader`	`LUT_IDL4`	Shader based on lookup table IDL4.
`static Shader`	`LUT_ISOPHOT`	Shader based on lookup table Isophot.
`static Shader`	`LUT_LIGHT`	Shader based on lookup table Light.
`static Shader`	`LUT_MANYCOL`	Shader based on lookup table Manycol.
`static Shader`	`LUT_MPL2INFERNO`	Shader copied from Matplotlib 2.0 Inferno lookup table.
`static Shader`	`LUT_MPL2MAGMA`	Shader copied from Matplotlib 2.0 Magma lookup table.
`static Shader`	`LUT_MPL2PLASMA`	Shader copied from Matplotlib 2.0 Plasma lookup table.
`static Shader`	`LUT_MPL2VIRIDIS`	Shader copied from Matplotlib 2.0 Viridis lookup table.
`static Shader`	`LUT_PAINBOW`	Painbow shader scraped from https://xkcd.com/2537/.
`static Shader`	`LUT_PAIRED`	Shader copied from Matplotlib Paired lookup table.
`static Shader`	`LUT_PASTEL`	Shader based on lookup table Pastel.
`static Shader`	`LUT_RAINBOW`	Shader based on lookup table Rainbow.
`static Shader`	`LUT_RAINBOW3`	Shader copied from Matplotlib gist_rainbow lookup table.
`static Shader`	`LUT_RAMP`	Shader based on lookup table Ramp.
`static Shader`	`LUT_RANDOM`	Shader based on lookup table Random.
`static Shader`	`LUT_REAL`	Shader based on lookup table Real.
`static Shader`	`LUT_SET1`	Shader copied from Matplotlib Set1 lookup table.
`static Shader[]`	`LUT_SHADERS`	Selection of lookup table-based shaders.
`static Shader`	`LUT_SMOOTH`	Shader based on lookup table Smooth.
`static Shader`	`LUT_SPECXB2Y`	Shader copied from SPECX blue2yellow lookup table.
`static Shader`	`LUT_STAIRCASE`	Shader based on lookup table Staircase.
`static Shader`	`LUT_STANDARD`	Shader based on lookup table Standard.
`static java.lang.String`	`LUTFILES_PROPERTY`	Property containing a File.pathSeparator-separated list of text files containing custom lookup tables.
`static Shader`	`NULL`	Shader which does nothing.
`static Shader`	`RED_BLUE`	Interpolates between red (0) and blue (1).
`static Shader`	`SCALE_BLUE`	Scales blue level by parameter value.
`static Shader`	`SCALE_GREEN`	Scales green level by parameter value.
`static Shader`	`SCALE_H`	Scales H in HSV colour space.
`static Shader`	`SCALE_INTENSITY`	Shader which scales intensity.
`static Shader`	`SCALE_RED`	Scales red level by parameter value.
`static Shader`	`SCALE_S`	Scales S in HSV colour space.
`static Shader`	`SCALE_V`	Scales V in HSV colour space.
`static Shader`	`SCALE_Y`	Scales Y in YUV colour space.
`static Shader`	`SRON_RAINBOW`	Rainbow shader copied from SRON technical note SRON/EPS/TN/09-002.
`static Shader`	`TRANSPARENCY`	Scales alpha channel by parameter value.
`static Shader`	`WHITE_BLACK`	Interpolates between white (0) and black (1).

Constructor Summary

Constructors
Constructor Description

Shaders()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Shader`	`applyShader(Shader shader, java.awt.Color baseColor, int nsample)`	Creates a shader by applying an existing shader to a given base colour.
`static javax.swing.Icon`	`create2dIcon(Shader xShader, Shader yShader, boolean xFirst, java.awt.Color baseColor, int width, int height, int xpad, int ypad)`	Constructs an icon which represents two shaders in two dimensions.
`static Shader`	`createFixedShader(java.lang.String name, java.awt.Color color)`	Creates a shader which always returns a fixed colour regardless of the supplied parameter.
`static Shader`	`createInterpolationShader(java.lang.String name, java.awt.Color[] colors)`	Constructs a shader which interpolates between a sequence of colours.
`static Shader`	`createInterpolationShader(java.lang.String name, java.awt.Color color0, java.awt.Color color1)`	Constructs a shader which interpolates smoothly between two colours.
`static Shader`	`createMaskShader(java.lang.String name, float minMask, float maxMask, boolean sense)`	Creates a shader which for each value either does nothing to a colour or turns it completely transparent.
`static javax.swing.Icon`	`createShaderIcon(Shader shader, boolean horizontal, int width, int height, int xpad, int ypad)`	Returns an icon which displays a shader in action, using a default grid shader if required.
`static javax.swing.Icon`	`createShaderIcon(Shader shader, Shader gridShader, boolean horizontal, int width, int height, int xpad, int ypad)`	Returns an icon which displays a shader in action, using an explicitly provided grid shader.
`static Shader`	`fade(Shader shader, float scaleAlpha)`	Returns a shader which scales the alpha value of all its colours by a given constant.
`static Shader[]`	`getCustomShaders()`	Returns an array of any custom shaders specified by the `LUTFILES_PROPERTY` property.
`static Shader`	`invert(Shader shader)`	Returns a shader which runs in the opposite direction to a given one.
`static boolean`	`isTransparent(Shader shader)`	Indicates whether the given shader object is capable of introducing transparency into a colour (modifying rgba[3] from 1 to a lower value).
`static Shader`	`quantise(Shader shader, double nlevel)`	Returns a shader which splits the colour map into a set of discrete levels.
`static Shader`	`rename(Shader shader, java.lang.String name)`	Returns a shader which delegates all behaviour to a supplied base instance, except it has a given name.
`static Shader`	`stretch(Shader shader, float frac0, float frac1)`	Returns a shader which corresponds to a sub-range of a given shader.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - LUTFILES_PROPERTY
```
public static final java.lang.String LUTFILES_PROPERTY
```
    Property containing a File.pathSeparator-separated list of text files containing custom lookup tables. Each line should contain three space-separated floating point values between zero and one giving the Red, Green and Blue components of a colour.
    
    See Also:
    
    getCustomShaders(), Constant Field Values
  - FIX_RED
```
public static final Shader FIX_RED
```
    Fixes red level at parameter value.
  - FIX_GREEN
```
public static final Shader FIX_GREEN
```
    Fixes green level at parameter value.
  - FIX_BLUE
```
public static final Shader FIX_BLUE
```
    Fixes blue level at parameter value.
  - SCALE_RED
```
public static final Shader SCALE_RED
```
    Scales red level by parameter value.
  - SCALE_GREEN
```
public static final Shader SCALE_GREEN
```
    Scales green level by parameter value.
  - SCALE_BLUE
```
public static final Shader SCALE_BLUE
```
    Scales blue level by parameter value.
  - FIX_Y
```
public static final Shader FIX_Y
```
    Fixes Y in YUV colour space.
  - FIX_U
```
public static final Shader FIX_U
```
    Fixes U in YUV colour space.
  - FIX_V
```
public static final Shader FIX_V
```
    Fixes V in YUV colour space.
  - SCALE_Y
```
public static final Shader SCALE_Y
```
    Scales Y in YUV colour space.
  - HSV_H
```
public static final Shader HSV_H
```
    Fixes H in HSV colour space.
  - HSV_S
```
public static final Shader HSV_S
```
    Fixes S in HSV colour space.
  - HSV_V
```
public static final Shader HSV_V
```
    Fixes V in HSV colour space.
  - SCALE_H
```
public static final Shader SCALE_H
```
    Scales H in HSV colour space.
  - SCALE_S
```
public static final Shader SCALE_S
```
    Scales S in HSV colour space.
  - SCALE_V
```
public static final Shader SCALE_V
```
    Scales V in HSV colour space.
  - RED_BLUE
```
public static final Shader RED_BLUE
```
    Interpolates between red (0) and blue (1).
  - CYAN_MAGENTA
```
public static final Shader CYAN_MAGENTA
```
    Interpolates between cyan (0) and magenta (1).
  - WHITE_BLACK
```
public static final Shader WHITE_BLACK
```
    Interpolates between white (0) and black (1).
  - BLACK_WHITE
```
public static final Shader BLACK_WHITE
```
    Interpolates between black (0) and white (1).
  - SRON_RAINBOW
```
public static final Shader SRON_RAINBOW
```
    Rainbow shader copied from SRON technical note SRON/EPS/TN/09-002.
  - CUBEHELIX
```
public static final Shader CUBEHELIX
```
    Standard cubehelix shader.
  - CUBEHELIX2
```
public static final Shader CUBEHELIX2
```
    Enhanced hue cubehelix shader.
  - CUBEHELIX3
```
public static final Shader CUBEHELIX3
```
    Lurid cubehelix shader.
  - LUT_AIPS0
```
public static final Shader LUT_AIPS0
```
    Shader based on lookup table Aips0.
  - LUT_BACKGR
```
public static final Shader LUT_BACKGR
```
    Shader based on lookup table Backgr.
  - LUT_COLOR
```
public static final Shader LUT_COLOR
```
    Shader based on lookup table Color.
  - LUT_HEAT
```
public static final Shader LUT_HEAT
```
    Shader based on lookup table Heat.
  - LUT_IDL2
```
public static final Shader LUT_IDL2
```
    Shader based on lookup table IDL2.
  - LUT_IDL4
```
public static final Shader LUT_IDL4
```
    Shader based on lookup table IDL4.
  - LUT_ISOPHOT
```
public static final Shader LUT_ISOPHOT
```
    Shader based on lookup table Isophot.
  - LUT_LIGHT
```
public static final Shader LUT_LIGHT
```
    Shader based on lookup table Light.
  - LUT_MANYCOL
```
public static final Shader LUT_MANYCOL
```
    Shader based on lookup table Manycol.
  - LUT_PASTEL
```
public static final Shader LUT_PASTEL
```
    Shader based on lookup table Pastel.
  - LUT_RAINBOW
```
public static final Shader LUT_RAINBOW
```
    Shader based on lookup table Rainbow.
  - LUT_RAMP
```
public static final Shader LUT_RAMP
```
    Shader based on lookup table Ramp.
  - LUT_RANDOM
```
public static final Shader LUT_RANDOM
```
    Shader based on lookup table Random.
  - LUT_REAL
```
public static final Shader LUT_REAL
```
    Shader based on lookup table Real.
  - LUT_SMOOTH
```
public static final Shader LUT_SMOOTH
```
    Shader based on lookup table Smooth.
  - LUT_STAIRCASE
```
public static final Shader LUT_STAIRCASE
```
    Shader based on lookup table Staircase.
  - LUT_STANDARD
```
public static final Shader LUT_STANDARD
```
    Shader based on lookup table Standard.
  - LUT_ACCENT
```
public static final Shader LUT_ACCENT
```
    Shader based on lookup table Accent.
  - LUT_COLD
```
public static final Shader LUT_COLD
```
    Shader based on lookup table Cold.
  - LUT_GLNEMO2
```
public static final Shader LUT_GLNEMO2
```
    Shader copied from glNemo2 application.
  - LUT_GNUPLOT
```
public static final Shader LUT_GNUPLOT
```
    Shader copied from Matplotlib Gnuplot lookup table.
  - LUT_GNUPLOT2
```
public static final Shader LUT_GNUPLOT2
```
    Shader copied from Matplotlib Gnuplot2 lookup table.
  - LUT_SPECXB2Y
```
public static final Shader LUT_SPECXB2Y
```
    Shader copied from SPECX blue2yellow lookup table.
  - LUT_BRG
```
public static final Shader LUT_BRG
```
    Shader copied from Matplotlib BRG lookup table.
  - LUT_PAIRED
```
public static final Shader LUT_PAIRED
```
    Shader copied from Matplotlib Paired lookup table.
  - LUT_RAINBOW3
```
public static final Shader LUT_RAINBOW3
```
    Shader copied from Matplotlib gist_rainbow lookup table.
  - LUT_SET1
```
public static final Shader LUT_SET1
```
    Shader copied from Matplotlib Set1 lookup table.
  - LUT_MPL2MAGMA
```
public static final Shader LUT_MPL2MAGMA
```
    Shader copied from Matplotlib 2.0 Magma lookup table.
  - LUT_MPL2INFERNO
```
public static final Shader LUT_MPL2INFERNO
```
    Shader copied from Matplotlib 2.0 Inferno lookup table.
  - LUT_MPL2PLASMA
```
public static final Shader LUT_MPL2PLASMA
```
    Shader copied from Matplotlib 2.0 Plasma lookup table.
  - LUT_MPL2VIRIDIS
```
public static final Shader LUT_MPL2VIRIDIS
```
    Shader copied from Matplotlib 2.0 Viridis lookup table.
  - LUT_HOTCOLD
```
public static final Shader LUT_HOTCOLD
```
    Diverging hot-cold shader provided by Daniel Michalik.
  - LUT_CIVIDIS
```
public static final Shader LUT_CIVIDIS
```
    Cividis shader derived from DOI:10.1371/journal.pone.0199239.
  - LUT_PAINBOW
```
public static final Shader LUT_PAINBOW
```
    Painbow shader scraped from https://xkcd.com/2537/. Thanks Randall.
  - LUT_SHADERS
```
public static final Shader[] LUT_SHADERS
```
    Selection of lookup table-based shaders.
  - BREWER_BUGN
```
public static final Shader BREWER_BUGN
```
    ColorBrewer sequential blue-green shader.
  - BREWER_BUPU
```
public static final Shader BREWER_BUPU
```
    ColorBrewer sequential blue-purple shader.
  - BREWER_ORRD
```
public static final Shader BREWER_ORRD
```
    ColorBrewer sequential orange-red shader.
  - BREWER_PUBU
```
public static final Shader BREWER_PUBU
```
    ColorBrewer sequential purple-blue shader.
  - BREWER_PURD
```
public static final Shader BREWER_PURD
```
    ColorBrewer sequential purple-red shader.
  - BREWER_RDBU
```
public static final Shader BREWER_RDBU
```
    ColorBrewer diverging red-blue shader.
  - BREWER_PIYG
```
public static final Shader BREWER_PIYG
```
    ColorBrewer diverging pink-green shader.
  - BREWER_BRBG
```
public static final Shader BREWER_BRBG
```
    ColorBrewer diverging brown-blue-green shader.
  - HCL_POLAR
```
public static final Shader HCL_POLAR
```
    Hue-chroma-luminance cyclic shader. Got from hclwizard.org with parameters: qualitative, H1=0 H2=351, N=40, C1=90, L1=60
  - DFLT_GRID_SHADER
```
public static final Shader DFLT_GRID_SHADER
```
    Shader used by default for the transverse axis of non-absolute ramps.
  - NULL
```
public static final Shader NULL
```
    Shader which does nothing.
  - TRANSPARENCY
```
public static final Shader TRANSPARENCY
```
    Scales alpha channel by parameter value.
  - FIX_INTENSITY
```
public static final Shader FIX_INTENSITY
```
    Shader which sets intensity.
  - SCALE_INTENSITY
```
public static final Shader SCALE_INTENSITY
```
    Shader which scales intensity.
  - FADE_BLACK
```
public static final Shader FADE_BLACK
```
    Shader which interpolates between the base colour and black.
  - FADE_WHITE
```
public static final Shader FADE_WHITE
```
    Shader which interpolates between the base colour and white.
  - FIX_HUE
```
public static final Shader FIX_HUE
```
    Shader which fixes hue.
- Constructor Detail
  - Shaders
```
public Shaders()
```
- Method Detail
  - createInterpolationShader
```
public static Shader createInterpolationShader(java.lang.String name,
                                               java.awt.Color color0,
                                               java.awt.Color color1)
```
    Constructs a shader which interpolates smoothly between two colours.
    
    Parameters:
    
    name - name
    
    color0 - colour corresponding to parameter value 0
    
    color1 - colour corresponding to parameter value 1
    
    Returns:
    
    shader
  - createInterpolationShader
```
public static Shader createInterpolationShader(java.lang.String name,
                                               java.awt.Color[] colors)
```
    Constructs a shader which interpolates between a sequence of colours. The shading is defined by a sequence of linear segments.
    
    Parameters:
    
    name - name
    
    colors - sequence of colours; value 0 corresponds to the first colour and value 1 corresponds to the last
    
    Returns:
    
    shader
  - createFixedShader
```
public static Shader createFixedShader(java.lang.String name,
                                       java.awt.Color color)
```
    Creates a shader which always returns a fixed colour regardless of the supplied parameter.
    
    Parameters:
    
    name - shader name
    
    color - fixed output colour
    
    Returns:
    
    fixed colour shader
  - createMaskShader
```
public static Shader createMaskShader(java.lang.String name,
                                      float minMask,
                                      float maxMask,
                                      boolean sense)
```
    Creates a shader which for each value either does nothing to a colour or turns it completely transparent. The pass range is specified by a minimum and maximum value and a sense.
    
    Parameters:
    
    name - shader name
    
    minMask - minimum value (exclusive) for range
    
    maxMask - maximum value (exclusive) for range
    
    sense - if true, values outside the range are transparent, if false, values within the range are transparent
  - getCustomShaders
```
public static Shader[] getCustomShaders()
```
    Returns an array of any custom shaders specified by the LUTFILES_PROPERTY property.
    
    Returns:
    
    array of zero or more custom shaders
  - invert
```
public static Shader invert(Shader shader)
```
    Returns a shader which runs in the opposite direction to a given one.
    
    Parameters:
    
    shader - base shader
    
    Returns:
    
    inverted version
  - fade
```
public static Shader fade(Shader shader,
                          float scaleAlpha)
```
    Returns a shader which scales the alpha value of all its colours by a given constant.
    
    Parameters:
    
    shader - input shader
    
    scaleAlpha - alpha scaling factor, in range 0..1
    
    Returns:
    
    fading shader; same as input if scaleAlpha==1
  - rename
```
public static Shader rename(Shader shader,
                            java.lang.String name)
```
    Returns a shader which delegates all behaviour to a supplied base instance, except it has a given name.
    
    Parameters:
    
    shader - base shader
    
    name - new name
    
    Returns:
    
    new shader
  - stretch
```
public static Shader stretch(Shader shader,
                             float frac0,
                             float frac1)
```
    Returns a shader which corresponds to a sub-range of a given shader.
    
    Parameters:
    
    shader - base shader
    
    frac0 - parameter value in base shader corresponding to value 0 in this one (must be in range 0-1)
    
    frac1 - parameter value in base shader corresponding to value 1 in this one (must be in range 0-1)
    
    Returns:
    
    new shader
  - quantise
```
public static Shader quantise(Shader shader,
                              double nlevel)
```
    Returns a shader which splits the colour map into a set of discrete levels.
    
    Parameters:
    
    shader - base shader
    
    nlevel - number of discrete colour levels required
    
    Returns:
    
    new shader
  - applyShader
```
public static Shader applyShader(Shader shader,
                                 java.awt.Color baseColor,
                                 int nsample)
```
    Creates a shader by applying an existing shader to a given base colour. This only does useful work if the existing shader is non-absolute.
    
    Parameters:
    
    shader - shader to apply (presumably non-absolute)
    
    baseColor - colour to which the shader will be applied
    
    nsample - number of samples in the lookup table
    
    Returns:
    
    new absolute shader
  - create2dIcon
```
public static javax.swing.Icon create2dIcon(Shader xShader,
                                            Shader yShader,
                                            boolean xFirst,
                                            java.awt.Color baseColor,
                                            int width,
                                            int height,
                                            int xpad,
                                            int ypad)
```
    Constructs an icon which represents two shaders in two dimensions.
    
    Parameters:
    
    xShader - shader for X direction
    
    yShader - shader for Y direction
    
    xFirst - true if X shader is to be applied first
    
    baseColor - base colour for the shaders to work on
    
    width - total width of the icon
    
    height - total height of the icon
    
    xpad - internal padding in the X direction
    
    ypad - internal padding in the Y direction
    
    Returns:
    
    icon
  - createShaderIcon
```
public static javax.swing.Icon createShaderIcon(Shader shader,
                                                Shader gridShader,
                                                boolean horizontal,
                                                int width,
                                                int height,
                                                int xpad,
                                                int ypad)
```
    Returns an icon which displays a shader in action, using an explicitly provided grid shader.
    
    Parameters:
    
    shader - shader to illustrate
    
    gridShader - defines the pixels along the transverse direction of the shader; ignored (may be null) for absolute shaders
    
    horizontal - true for shading running horizontally, false for vertically
    
    width - total icon width in pixels
    
    height - total icon height in pixels
    
    xpad - internal padding in the X direction
    
    ypad - internal padding in the Y direction
    
    Returns:
    
    icon
  - createShaderIcon
```
public static javax.swing.Icon createShaderIcon(Shader shader,
                                                boolean horizontal,
                                                int width,
                                                int height,
                                                int xpad,
                                                int ypad)
```
    Returns an icon which displays a shader in action, using a default grid shader if required.
    
    Parameters:
    
    shader - shader to illustrate
    
    horizontal - true for shading running horizontally, false for vertically
    
    width - total icon width in pixels
    
    height - total icon height in pixels
    
    xpad - internal padding in the X direction
    
    ypad - internal padding in the Y direction
    
    Returns:
    
    icon
  - isTransparent
```
public static boolean isTransparent(Shader shader)
```
    Indicates whether the given shader object is capable of introducing transparency into a colour (modifying rgba[3] from 1 to a lower value).
    
    Parameters:
    
    shader - shader to test
    
    Returns:
    
    true if shader adjusts transparency or is null

Class Shaders

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

LUTFILES_PROPERTY

FIX_RED

FIX_GREEN

FIX_BLUE

SCALE_RED

SCALE_GREEN

SCALE_BLUE

FIX_Y

FIX_U

FIX_V

SCALE_Y

HSV_H

HSV_S

HSV_V

SCALE_H

SCALE_S

SCALE_V

RED_BLUE

CYAN_MAGENTA

WHITE_BLACK

BLACK_WHITE

SRON_RAINBOW

CUBEHELIX

CUBEHELIX2

CUBEHELIX3

LUT_AIPS0

LUT_BACKGR

LUT_COLOR

LUT_HEAT

LUT_IDL2

LUT_IDL4

LUT_ISOPHOT

LUT_LIGHT

LUT_MANYCOL

LUT_PASTEL

LUT_RAINBOW

LUT_RAMP

LUT_RANDOM

LUT_REAL

LUT_SMOOTH

LUT_STAIRCASE

LUT_STANDARD

LUT_ACCENT

LUT_COLD

LUT_GLNEMO2

LUT_GNUPLOT

LUT_GNUPLOT2

LUT_SPECXB2Y

LUT_BRG

LUT_PAIRED

LUT_RAINBOW3

LUT_SET1

LUT_MPL2MAGMA

LUT_MPL2INFERNO

LUT_MPL2PLASMA

LUT_MPL2VIRIDIS

LUT_HOTCOLD

LUT_CIVIDIS

LUT_PAINBOW

LUT_SHADERS

BREWER_BUGN

BREWER_BUPU

BREWER_ORRD

BREWER_PUBU

BREWER_PURD

BREWER_RDBU

BREWER_PIYG

BREWER_BRBG

HCL_POLAR

DFLT_GRID_SHADER

NULL

TRANSPARENCY

FIX_INTENSITY

SCALE_INTENSITY