API java : Paint

java.awt
Interface Paint

All Superinterfaces:

Transparency

All Known Implementing Classes:

Color, ColorUIResource, GradientPaint, SystemColor, TexturePaint

public interface Paint
extends Transparency

This Paint interface defines how color patterns can be generated for Graphics2D operations. A class implementing the Paint interface is added to the Graphics2D context in order to define the color pattern used by the draw and fill methods.

Instances of classes implementing Paint must be read-only because the Graphics2D does not clone these objects when they are set as an attribute with the setPaint method or when the Graphics2D object is itself cloned.

See Also:

PaintContext, Color, GradientPaint, TexturePaint, Graphics2D.setPaint(java.awt.Paint)

Field Summary

 

Fields inherited from interface java.awt.Transparency
BITMASK, OPAQUE, TRANSLUCENT

 

Method Summary
PaintContext	createContext(ColorModel cm, Rectangle deviceBounds, Rectangle2D userBounds, AffineTransform xform, RenderingHints hints)           Creates and returns a PaintContext used to generate the color pattern.

 

Methods inherited from interface java.awt.Transparency
getTransparency

 

Method Detail

createContext

PaintContext createContext(ColorModel cm,
                           Rectangle deviceBounds,
                           Rectangle2D userBounds,
                           AffineTransform xform,
                           RenderingHints hints)

Creates and returns a PaintContext used to generate the color pattern. Since the ColorModel argument to createContext is only a hint, implementations of Paint should accept a null argument for ColorModel. Note that if the application does not prefer a specific ColorModel, the null ColorModel argument will give the Paint implementation full leeway in using the most efficient ColorModel it prefers for its raster processing.

Since the API documentation was not specific about this in releases before 1.4, there may be implementations of Paint that do not accept a null ColorModel argument. If a developer is writing code which passes a null ColorModel argument to the createContext method of Paint objects from arbitrary sources it would be wise to code defensively by manufacturing a non-null ColorModel for those objects which throw a NullPointerException.

Parameters:

cm - the 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

xform - the AffineTransform from user space into device space

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

Returns:

the PaintContext for generating color patterns

See Also:

PaintContext