nioimagebuffer.html

JAVA多媒体开发类库说明

<B>Constructor Detail</B></FONT></TH>
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<A NAME="NioImageBuffer(int, int, javax.media.j3d.NioImageBuffer.ImageType)"><!-- --></A><H3>
NioImageBuffer</H3>
<PRE>
public <B>NioImageBuffer</B>(int&nbsp;width,
                      int&nbsp;height,
                      <A HREF="../../../javax/media/j3d/NioImageBuffer.ImageType.html" title="enum in javax.media.j3d">NioImageBuffer.ImageType</A>&nbsp;imageType)</PRE>
<DL>
<DD>Constructs an NIO image buffer of the specified size and type.
 A direct NIO buffer of the correct type (ByteBuffer or IntBuffer)
 and size to match the input parameters
 is allocated.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>width</CODE> - width of the image<DD><CODE>height</CODE> - height of the image<DD><CODE>imageType</CODE> - type of the image.
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if width < 1 or height < 1
<DD><CODE>java.lang.NullPointerException</CODE> - if imageType is null</DL>
</DL>
<HR>

<A NAME="NioImageBuffer(int, int, javax.media.j3d.NioImageBuffer.ImageType, java.nio.Buffer)"><!-- --></A><H3>
NioImageBuffer</H3>
<PRE>
public <B>NioImageBuffer</B>(int&nbsp;width,
                      int&nbsp;height,
                      <A HREF="../../../javax/media/j3d/NioImageBuffer.ImageType.html" title="enum in javax.media.j3d">NioImageBuffer.ImageType</A>&nbsp;imageType,
                      java.nio.Buffer&nbsp;dataBuffer)</PRE>
<DL>
<DD>Constructs an NIO image buffer of the specified size and type, using
 the specified dataBuffer.
 The the byte order of the specified dataBuffer must match the native
 byte order of the underlying platform.
 For best performance, the NIO buffer should be a direct buffer.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>width</CODE> - width of the image<DD><CODE>height</CODE> - height of the image<DD><CODE>imageType</CODE> - type of the image.<DD><CODE>dataBuffer</CODE> - an NIO buffer of the correct type (ByteBuffer or
 IntBuffer) to match the specified imageType.
 This constructor will create a new view of
 the buffer, and will call <code>rewind</code> on that view,
 such that elements 0 through <code>dataBuffer.limit()-1</code>
 will be available internally. The number of elements in
 the buffer must be exactly <code>width*height*numElementsPerPixel</code>,
 where <code>numElementsPerPixel</code> is
 3 for TYPE_3BYTE_BGR and TYPE_3BYTE_RGB,
 4 for TYPE_4BYTE_ABGR and TYPE_4BYTE_RGBA,
 and 1 for all other types.
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if width < 1 or height < 1
<DD><CODE>java.lang.NullPointerException</CODE> - if imageType or dataBuffer is null
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the type of the dataBuffer does
 not match the imageType
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if <code>dataBuffer.limit() !=
 width*height*numElementsPerPixel</code>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the byte order of the specified
 dataBuffer does not match the native byte order of the underlying
 platform.</DL>
</DL>

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<A NAME="getWidth()"><!-- --></A><H3>
getWidth</H3>
<PRE>
public int <B>getWidth</B>()</PRE>
<DL>
<DD>Gets the width of this data buffer.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the width of this data buffer.</DL>
</DD>
</DL>
<HR>

<A NAME="getHeight()"><!-- --></A><H3>
getHeight</H3>
<PRE>
public int <B>getHeight</B>()</PRE>
<DL>
<DD>Gets the height of this data buffer.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the width of this data buffer.</DL>
</DD>
</DL>
<HR>

<A NAME="getImageType()"><!-- --></A><H3>
getImageType</H3>
<PRE>
public <A HREF="../../../javax/media/j3d/NioImageBuffer.ImageType.html" title="enum in javax.media.j3d">NioImageBuffer.ImageType</A> <B>getImageType</B>()</PRE>
<DL>
<DD>Gets the image type of this data buffer.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the image type of this data buffer.</DL>
</DD>
</DL>
<HR>

<A NAME="setDataBuffer(java.nio.Buffer)"><!-- --></A><H3>
setDataBuffer</H3>
<PRE>
public void <B>setDataBuffer</B>(java.nio.Buffer&nbsp;dataBuffer)</PRE>
<DL>
<DD>Sets the data buffer to the specified input data buffer.
 The the byte order of the specified dataBuffer must match the native
 byte order of the underlying platform.
 For best performance, the NIO buffer should be a direct buffer.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>dataBuffer</CODE> - an NIO buffer of the correct type (ByteBuffer or
 IntBuffer) to match the imageType of this
 NioImageBuffer. This method will create a new view of
 the buffer, and will call <code>rewind</code> on that view,
 such that elements 0 through <code>dataBuffer.limit()-1</code>
 will be available internally. The number of elements in
 the buffer must be exactly <code>width*height*numElementsPerPixel</code>,
 where <code>numElementsPerPixel</code> is
 3 for TYPE_3BYTE_BGR and TYPE_3BYTE_RGB,
 4 for TYPE_4BYTE_ABGR and TYPE_4BYTE_RGBA,
 and 1 for all other types.
<DT><B>Throws:</B>
<DD><CODE>java.lang.NullPointerException</CODE> - if dataBuffer is null
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the type of the dataBuffer does
 not match the imageType
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if <code>dataBuffer.limit() !=
 width*height*numElementsPerPixel</code>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the byte order of the specified
 dataBuffer does not match the native byte order of the underlying
 platform.</DL>
</DD>
</DL>
<HR>

<A NAME="getDataBuffer()"><!-- --></A><H3>
getDataBuffer</H3>
<PRE>
public java.nio.Buffer <B>getDataBuffer</B>()</PRE>
<DL>
<DD>Gets the data buffer to the specified input data buffer.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>a view of the current data buffer for this NIO image buffer.
 This view will be rewound such that elements 0
 through <code>dataBuffer.limit()-1</code> are available.</DL>
</DD>
</DL>
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