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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Apr 27 23:32:12 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Interface Composite</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Composite.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../java/awt/Adjustable.html"><B>PREV CLASS</B></A> <A HREF="../../java/awt/CompositeContext.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="Composite.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">java.awt</FONT><BR>Interface Composite</H2><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../java/awt/AlphaComposite.html">AlphaComposite</A></DD></DL><HR><DL><DT>public interface <B>Composite</B></DL><P>The <code>Composite</code> interface, along with <A HREF="../../java/awt/CompositeContext.html"><CODE>CompositeContext</CODE></A>, defines the methods to compose a draw primitive with the underlying graphics area. After the <code>Composite</code> is set in the <A HREF="../../java/awt/Graphics2D.html"><CODE>Graphics2D</CODE></A> context, it combines a shape, text, or an image being rendered with the colors that have already been rendered according to pre-defined rules. The classes implementing this interface provide the rules and a method to create the context for a particular operation. <code>CompositeContext</code> is an environment used by the compositing operation, which is created by the <code>Graphics2D</code> prior to the start of the operation. <code>CompositeContext</code> contains private information and resources needed for a compositing operation. When the <code>CompositeContext</code> is no longer needed, the <code>Graphics2D</code> object disposes of it in order to reclaim resources allocated for the operation. <p> Instances of classes implementing <code>Composite</code> must be immutable because the <code>Graphics2D</code> does not clone these objects when they are set as an attribute with the <code>setComposite</code> method or when the <code>Graphics2D</code> object is cloned. This is to avoid undefined rendering behavior of <code>Graphics2D</code>, resulting from the modification of the <code>Composite</code> object after it has been set in the <code>Graphics2D</code> context. <p> Since this interface must expose the contents of pixels on the target device or image to potentially arbitrary code, the use of custom objects which implement this interface when rendering directly to a screen device is governed by the <code>readDisplayPixels</code> <A HREF="../../java/awt/AWTPermission.html"><CODE>AWTPermission</CODE></A>. The permission check will occur when such a custom object is passed to the <code>setComposite</code> method of a <code>Graphics2D</code> retrieved from a <A HREF="../../java/awt/Component.html"><CODE>Component</CODE></A>.<P><DL><DT><B>See Also: </B><DD><A HREF="../../java/awt/AlphaComposite.html"><CODE>AlphaComposite</CODE></A>, <A HREF="../../java/awt/CompositeContext.html"><CODE>CompositeContext</CODE></A>, <A HREF="../../java/awt/Graphics2D.html#setComposite(java.awt.Composite)"><CODE>Graphics2D.setComposite(java.awt.Composite)</CODE></A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/awt/CompositeContext.html">CompositeContext</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/Composite.html#createContext(java.awt.image.ColorModel, java.awt.image.ColorModel, java.awt.RenderingHints)">createContext</A></B>(<A HREF="../../java/awt/image/ColorModel.html">ColorModel</A> srcColorModel, <A HREF="../../java/awt/image/ColorModel.html">ColorModel</A> dstColorModel, <A HREF="../../java/awt/RenderingHints.html">RenderingHints</A> hints)</CODE><BR> Creates a context containing state that is used to perform the compositing operation.</TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="createContext(java.awt.image.ColorModel, java.awt.image.ColorModel, java.awt.RenderingHints)"><!-- --></A><H3>createContext</H3><PRE>public <A HREF="../../java/awt/CompositeContext.html">CompositeContext</A> <B>createContext</B>(<A HREF="../../java/awt/image/ColorModel.html">ColorModel</A> srcColorModel, <A HREF="../../java/awt/image/ColorModel.html">ColorModel</A> dstColorModel, <A HREF="../../java/awt/RenderingHints.html">RenderingHints</A> hints)</PRE><DL><DD>Creates a context containing state that is used to perform the compositing operation. In a multi-threaded environment, several contexts can exist simultaneously for a single <code>Composite</code> object.<DD><DL><DT><B>Parameters:</B><DD><CODE>srcColorModel</CODE> - the <A HREF="../../java/awt/image/ColorModel.html"><CODE>ColorModel</CODE></A> of the source<DD><CODE>dstColorModel</CODE> - the <code>ColorModel</code> of the destination<DD><CODE>hints</CODE> - the hint that the context object uses to choose between rendering alternatives<DT><B>Returns:</B><DD>the <code>CompositeContext</code> object used to perform the compositing operation.</DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_bottom"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Composite.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../java/awt/Adjustable.html"><B>PREV CLASS</B></A> <A HREF="../../java/awt/CompositeContext.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="Composite.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><font size="-1"><a href="http://java.sun.com/cgi-bin/bugreport.cgi">Submit a bug or feature</a><br>For further API reference and developer documentation, see <a href="http://java.sun.com/products/jdk/1.3/devdocs-vs-specs.html">Java 2 SDK SE Developer Documentation</a>. 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