📄 indexcolormodel.html
字号:
<!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 23:34:08 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Class IndexColorModel</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/IndexColorModel.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/image/ImageFilter.html"><B>PREV CLASS</B></A> <A HREF="../../../java/awt/image/Kernel.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="IndexColorModel.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#fields_inherited_from_class_java.awt.image.ColorModel">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">java.awt.image</FONT><BR>Class IndexColorModel</H2><PRE><A HREF="../../../java/lang/Object.html">java.lang.Object</A> | +--<A HREF="../../../java/awt/image/ColorModel.html">java.awt.image.ColorModel</A> | +--<B>java.awt.image.IndexColorModel</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../java/awt/Transparency.html">Transparency</A></DD></DL><HR><DL><DT>public class <B>IndexColorModel</B><DT>extends <A HREF="../../../java/awt/image/ColorModel.html">ColorModel</A></DL><P>The <code>IndexColorModel</code> class is a <code>ColorModel</code> class that works with pixel values consisting of a single sample which is an index into a fixed colormap in the default sRGB ColorSpace. The colormap specifies red, green, blue, and optional alpha components corresponding to each index. All components are represented in the colormap as 8-bit unsigned integral values. If alpha is not present, an opaque alpha component (alpha = 1.0) is assumed for each entry. An optional transparent pixel value can be supplied that indicates a completely transparent pixel, regardless of any alpha component recorded for that pixel value. Note that alpha values in <code>IndexColorModel</code> objects are never premultiplied. This color model is similar to an X11 PseudoColor visual. <p> The index represented by a pixel value is stored in the least significant n bits of the pixel representations passed to the methods of this class, where n is the pixel size specified to the constructor for a particular <code>IndexColorModel</code> object and n must be between 1 and 16. Higher order bits in pixel representations are assumed to be zero. For those methods that use a primitive array pixel representation of type <code>transferType</code>, the array length is always one. The transfer types supported are DataBuffer.TYPE_BYTE and DataBuffer.TYPE_USHORT. A single int pixel representation is valid for all objects of this class, since it is always possible to represent pixel values used with this class in a single int. Therefore, methods that use this representation do not throw an <code>IllegalArgumentException</code> due to an invalid pixel value. <p> Many of the methods in this class are final. The reason for this is that the underlying native graphics code makes assumptions about the layout and operation of this class and those assumptions are reflected in the implementations of the methods here that are marked final. You can subclass this class for other reaons, but you cannot override or modify the behaviour of those methods.<P><DL><DT><B>See Also: </B><DD><A HREF="../../../java/awt/image/ColorModel.html"><CODE>ColorModel</CODE></A>, <A HREF="../../../java/awt/color/ColorSpace.html"><CODE>ColorSpace</CODE></A>, <A HREF="../../../java/awt/image/DataBuffer.html"><CODE>DataBuffer</CODE></A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="fields_inherited_from_class_java.awt.image.ColorModel"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class java.awt.image.<A HREF="../../../java/awt/image/ColorModel.html">ColorModel</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../java/awt/image/ColorModel.html#pixel_bits">pixel_bits</A>, <A HREF="../../../java/awt/image/ColorModel.html#transferType">transferType</A></CODE></TD></TR></TABLE> <A NAME="fields_inherited_from_class_java.awt.Transparency"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from interface java.awt.<A HREF="../../../java/awt/Transparency.html">Transparency</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../java/awt/Transparency.html#BITMASK">BITMASK</A>, <A HREF="../../../java/awt/Transparency.html#OPAQUE">OPAQUE</A>, <A HREF="../../../java/awt/Transparency.html#TRANSLUCENT">TRANSLUCENT</A></CODE></TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/IndexColorModel.html#IndexColorModel(int, int, byte[], byte[], byte[])">IndexColorModel</A></B>(int bits, int size, byte[] r, byte[] g, byte[] b)</CODE><BR> Constructs an <code>IndexColorModel</code> from the specified arrays of red, green, and blue components.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/IndexColorModel.html#IndexColorModel(int, int, byte[], byte[], byte[], byte[])">IndexColorModel</A></B>(int bits, int size, byte[] r, byte[] g, byte[] b, byte[] a)</CODE><BR> Constructs an <code>IndexColorModel</code> from the given arrays of red, green, blue and alpha components.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/IndexColorModel.html#IndexColorModel(int, int, byte[], byte[], byte[], int)">IndexColorModel</A></B>(int bits, int size, byte[] r, byte[] g, byte[] b, int trans)</CODE><BR> Constructs an <code>IndexColorModel</code> from the given arrays of red, green, and blue components.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/IndexColorModel.html#IndexColorModel(int, int, byte[], int, boolean)">IndexColorModel</A></B>(int bits, int size, byte[] cmap, int start, boolean hasalpha)</CODE><BR> Constructs an <code>IndexColorModel</code> from a single array of interleaved red, green, blue and optional alpha components.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/IndexColorModel.html#IndexColorModel(int, int, byte[], int, boolean, int)">IndexColorModel</A></B>(int bits, int size, byte[] cmap, int start, boolean hasalpha, int trans)</CODE><BR> Constructs an <code>IndexColorModel</code> from a single array of interleaved red, green, blue and optional alpha components.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/IndexColorModel.html#IndexColorModel(int, int, int[], int, boolean, int, int)">IndexColorModel</A></B>(int bits, int size, int[] cmap, int start, boolean hasalpha, int trans, int transferType)</CODE><BR> Constructs an <code>IndexColorModel</code> from an array of ints where each int is comprised of red, green, blue, and optional alpha components in the default RGB color model format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/IndexColorModel.html#IndexColorModel(int, int, int[], int, int, java.math.BigInteger)">IndexColorModel</A></B>(int bits, int size, int[] cmap, int start, int transferType, <A HREF="../../../java/math/BigInteger.html">BigInteger</A> validBits)</CODE><BR> Constructs an <code>IndexColorModel</code> from an <code>int</code> array where each <code>int</code> is comprised of red, green, blue, and alpha components in the default RGB color model format.</TD></TR></TABLE> ⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -