org.apache.batik.ext.awt

Class LinearGradientPaintContext

java.lang.Object

org.apache.batik.ext.awt.MultipleGradientPaintContext

org.apache.batik.ext.awt.LinearGradientPaintContext

All Implemented Interfaces:

java.awt.PaintContext

final class LinearGradientPaintContext
extends MultipleGradientPaintContext

Provides the actual implementation for the LinearGradientPaint This is where the pixel processing is done.

Version:

$Id: LinearGradientPaintContext.java 1733416 2016-03-03 07:07:13Z gadams $

See Also:

PaintContext, Paint, GradientPaint

Field Summary

Fields

Modifier and Type	Field and Description
private static int	ANTI_ALIAS_IMPL
private static int	DEFAULT_IMPL
private float	dgdX The following invariants are used to process the gradient value from a device space coordinate, (X, Y): g(X, Y) = dgdX*X + dgdY*Y + gc
private float	dgdY The following invariants are used to process the gradient value from a device space coordinate, (X, Y): g(X, Y) = dgdX*X + dgdY*Y + gc
private int	fillMethod
private float	gc The following invariants are used to process the gradient value from a device space coordinate, (X, Y): g(X, Y) = dgdX*X + dgdY*Y + gc
private float	pixSz The following invariants are used to process the gradient value from a device space coordinate, (X, Y): g(X, Y) = dgdX*X + dgdY*Y + gc

Fields inherited from class org.apache.batik.ext.awt.MultipleGradientPaintContext

a00, a01, a02, a10, a11, a12, cached, cachedModel, colorSpace, cycleMethod, dataModel, DEBUG, fastGradientArraySize, fractions, gradient, GRADIENT_SIZE, GRADIENT_SIZE_INDEX, gradientAverage, gradientOverflow, gradients, gradientsLength, gradientUnderflow, hasDiscontinuity, isSimpleLookup, model, normalizedIntervals, saved

Constructor Summary

Constructors

Constructor and Description

LinearGradientPaintContext(java.awt.image.ColorModel cm, java.awt.Rectangle deviceBounds, java.awt.geom.Rectangle2D userBounds, java.awt.geom.AffineTransform t, java.awt.RenderingHints hints, java.awt.geom.Point2D dStart, java.awt.geom.Point2D dEnd, float[] fractions, java.awt.Color[] colors, MultipleGradientPaint.CycleMethodEnum cycleMethod, MultipleGradientPaint.ColorSpaceEnum colorSpace) Constructor for LinearGradientPaintContext.

Method Summary

Modifier and Type	Method and Description
protected void	fillHardNoCycle(int[] pixels, int off, int adjust, int x, int y, int w, int h)
protected void	fillRaster(int[] pixels, int off, int adjust, int x, int y, int w, int h) Return a Raster containing the colors generated for the graphics operation.
protected void	fillSimpleNoCycle(int[] pixels, int off, int adjust, int x, int y, int w, int h)
protected void	fillSimpleReflect(int[] pixels, int off, int adjust, int x, int y, int w, int h)
protected void	fillSimpleRepeat(int[] pixels, int off, int adjust, int x, int y, int w, int h)

Methods inherited from class org.apache.batik.ext.awt.MultipleGradientPaintContext

calculateGradientFractions, dispose, getCachedRaster, getColorModel, getRaster, indexGradientAntiAlias, indexIntoGradientsArrays, putCachedRaster

Methods inherited from class java.lang.Object

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

Field Detail

dgdX

private float dgdX

The following invariants are used to process the gradient value from a device space coordinate, (X, Y): g(X, Y) = dgdX*X + dgdY*Y + gc

dgdY

private float dgdY

The following invariants are used to process the gradient value from a device space coordinate, (X, Y): g(X, Y) = dgdX*X + dgdY*Y + gc

gc

private float gc

The following invariants are used to process the gradient value from a device space coordinate, (X, Y): g(X, Y) = dgdX*X + dgdY*Y + gc

pixSz

private float pixSz

The following invariants are used to process the gradient value from a device space coordinate, (X, Y): g(X, Y) = dgdX*X + dgdY*Y + gc

DEFAULT_IMPL

private static final int DEFAULT_IMPL

See Also:

Constant Field Values

ANTI_ALIAS_IMPL

private static final int ANTI_ALIAS_IMPL

See Also:

Constant Field Values

fillMethod

private int fillMethod

Constructor Detail

LinearGradientPaintContext

public LinearGradientPaintContext(java.awt.image.ColorModel cm,
                                  java.awt.Rectangle deviceBounds,
                                  java.awt.geom.Rectangle2D userBounds,
                                  java.awt.geom.AffineTransform t,
                                  java.awt.RenderingHints hints,
                                  java.awt.geom.Point2D dStart,
                                  java.awt.geom.Point2D dEnd,
                                  float[] fractions,
                                  java.awt.Color[] colors,
                                  MultipleGradientPaint.CycleMethodEnum cycleMethod,
                                  MultipleGradientPaint.ColorSpaceEnum colorSpace)
                           throws java.awt.geom.NoninvertibleTransformException

Constructor for LinearGradientPaintContext.

Parameters:

cm - ColorModel that receives the Paint data. This is used only as a hint.

deviceBounds - the device space bounding box of the graphics primitive being rendered

userBounds - the user space bounding box of the graphics primitive being rendered

t - the AffineTransform from user space into device space (gradientTransform should be concatenated with this)

hints - the hints that the context object uses to choose between rendering alternatives

dStart - gradient start point, in user space

dEnd - gradient end point, in user space

fractions - the fractions specifying the gradient distribution

colors - the gradient colors

cycleMethod - either NO_CYCLE, REFLECT, or REPEAT

colorSpace - which colorspace to use for interpolation, either SRGB or LINEAR_RGB

Throws:

java.awt.geom.NoninvertibleTransformException

Method Detail

fillHardNoCycle

protected void fillHardNoCycle(int[] pixels,
                               int off,
                               int adjust,
                               int x,
                               int y,
                               int w,
                               int h)

fillSimpleNoCycle

protected void fillSimpleNoCycle(int[] pixels,
                                 int off,
                                 int adjust,
                                 int x,
                                 int y,
                                 int w,
                                 int h)

fillSimpleRepeat

protected void fillSimpleRepeat(int[] pixels,
                                int off,
                                int adjust,
                                int x,
                                int y,
                                int w,
                                int h)

fillSimpleReflect

protected void fillSimpleReflect(int[] pixels,
                                 int off,
                                 int adjust,
                                 int x,
                                 int y,
                                 int w,
                                 int h)

fillRaster

protected void fillRaster(int[] pixels,
                          int off,
                          int adjust,
                          int x,
                          int y,
                          int w,
                          int h)

Return a Raster containing the colors generated for the graphics operation. This is where the area is filled with colors distributed linearly.

Specified by:

fillRaster in class MultipleGradientPaintContext

Parameters:

x - The x coordinate of the area in device space for which colors are generated.

y - The y coordinate of the area in device space for which colors are generated.

w - The width of the area in device space for which colors are generated.

h - The height of the area in device space for which colors are generated.