gifimage.html

IText PDF开发工具说明文档,使用很方便。

<DD>Reads gif images from a stream. The stream is not closed.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>is</CODE> - the stream
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE> - on error</DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

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<B>Method Detail</B></FONT></TH>
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<A NAME="getFrameCount()"><!-- --></A><H3>
getFrameCount</H3>
<PRE>
public int <B>getFrameCount</B>()</PRE>
<DL>
<DD>Gets the number of frames the gif has.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the number of frames the gif has</DL>
</DD>
</DL>
<HR>

<A NAME="getImage(int)"><!-- --></A><H3>
getImage</H3>
<PRE>
public <A HREF="../../../../../com/lowagie/text/Image.html" title="class in com.lowagie.text">Image</A> <B>getImage</B>(int&nbsp;frame)</PRE>
<DL>
<DD>Gets the image from a frame. The first frame is 1.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>frame</CODE> - the frame to get the image from
<DT><B>Returns:</B><DD>the image</DL>
</DD>
</DL>
<HR>

<A NAME="getFramePosition(int)"><!-- --></A><H3>
getFramePosition</H3>
<PRE>
public int[] <B>getFramePosition</B>(int&nbsp;frame)</PRE>
<DL>
<DD>Gets the [x,y] position of the frame in reference to the
 logical screen.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>frame</CODE> - the frame
<DT><B>Returns:</B><DD>the [x,y] position of the frame</DL>
</DD>
</DL>
<HR>

<A NAME="getLogicalScreen()"><!-- --></A><H3>
getLogicalScreen</H3>
<PRE>
public int[] <B>getLogicalScreen</B>()</PRE>
<DL>
<DD>Gets the logical screen. The images may be smaller and placed
 in some position in this screen to playback some animation.
 No image will be be bigger that this.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the logical screen dimensions as [x,y]</DL>
</DD>
</DL>
<HR>

<A NAME="process(java.io.InputStream)"><!-- --></A><H3>
process</H3>
<PRE>
void <B>process</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</A>&nbsp;is)
       throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="readHeader()"><!-- --></A><H3>
readHeader</H3>
<PRE>
protected void <B>readHeader</B>()
                   throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Reads GIF file header information.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="readLSD()"><!-- --></A><H3>
readLSD</H3>
<PRE>
protected void <B>readLSD</B>()
                throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Reads Logical Screen Descriptor
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="readShort()"><!-- --></A><H3>
readShort</H3>
<PRE>
protected int <B>readShort</B>()
                 throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Reads next 16-bit value, LSB first
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="readBlock()"><!-- --></A><H3>
readBlock</H3>
<PRE>
protected int <B>readBlock</B>()
                 throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Reads next variable length block from input.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>number of bytes stored in "buffer"
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="readColorTable(int)"><!-- --></A><H3>
readColorTable</H3>
<PRE>
protected byte[] <B>readColorTable</B>(int&nbsp;bpc)
                         throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="newBpc(int)"><!-- --></A><H3>
newBpc</H3>
<PRE>
protected static int <B>newBpc</B>(int&nbsp;bpc)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readContents()"><!-- --></A><H3>
readContents</H3>
<PRE>
protected void <B>readContents</B>()
                     throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="readImage()"><!-- --></A><H3>
readImage</H3>
<PRE>
protected void <B>readImage</B>()
                  throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Reads next frame image
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="decodeImageData()"><!-- --></A><H3>
decodeImageData</H3>
<PRE>
protected boolean <B>decodeImageData</B>()
                           throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="setPixel(int, int, int)"><!-- --></A><H3>
setPixel</H3>
<PRE>
protected void <B>setPixel</B>(int&nbsp;x,
                        int&nbsp;y,
                        int&nbsp;v)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="resetFrame()"><!-- --></A><H3>
resetFrame</H3>
<PRE>
protected void <B>resetFrame</B>()</PRE>
<DL>
<DD>Resets frame state for reading next image.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readGraphicControlExt()"><!-- --></A><H3>
readGraphicControlExt</H3>
<PRE>
protected void <B>readGraphicControlExt</B>()
                              throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Reads Graphics Control Extension values
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="skip()"><!-- --></A><H3>
skip</H3>
<PRE>
protected void <B>skip</B>()
             throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Skips variable length blocks up to and including
 next zero length block.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
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