Class RasterGradient

java.lang.Object

com.codename1.backend.image.RasterGradient

All Implemented Interfaces:

RasterPaint

public final class RasterGradient
extends Object
implements RasterPaint

A linear or radial color gradient for RasterGraphics.setPaint(RasterPaint).

Colors are interpolated per channel, not premultiplied, between stops at increasing fractions from 0 to 1. Before the first stop and after the last one the end colors extend ("pad").

Method Summary

Modifier and Type	Method	Description
int	getColor(double x, double y)	Returns the gradient's color at a point.
static RasterGradient	linear(double x1, double y1, double x2, double y2, float[] fractions, int[] colors)	Creates a gradient along the line from (x1, y1) (fraction 0) to (x2, y2) (fraction 1).
static RasterGradient	radial(double cx, double cy, double radius, float[] fractions, int[] colors)	Creates a circular gradient from the center (fraction 0) to the circle of radius (fraction 1).

Methods inherited from class Object

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

Method Details

linear

public static RasterGradient linear(double x1,
 double y1,
 double x2,
 double y2,
 float[] fractions,
 int[] colors)

Creates a gradient along the line from (x1, y1) (fraction 0) to (x2, y2) (fraction 1).

Parameters

• x1: start x
• y1: start y
• x2: end x
• y2: end y
• fractions: stop positions, 0 to 1, not decreasing
• colors: ARGB color of each stop

Returns

the gradient

radial

public static RasterGradient radial(double cx,
 double cy,
 double radius,
 float[] fractions,
 int[] colors)

Creates a circular gradient from the center (fraction 0) to the circle of radius (fraction 1).

Parameters

• cx: center x
• cy: center y
• radius: radius, above zero
• fractions: stop positions, 0 to 1, not decreasing
• colors: ARGB color of each stop

Returns

the gradient

getColor

public int getColor(double x,
 double y)

Returns the gradient's color at a point.

Parameters

• x: user-space x
• y: user-space y

Returns

the ARGB color

Specified by:

getColor in interface RasterPaint