pngimage.html

IText PDF开发工具说明文档,使用很方便。

<PRE>
<B>PngImage</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)</PRE>
<DL>
<DD>Creates a new instance of PngImage
<P>
</DL>

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<B>Method Detail</B></FONT></TH>
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<A NAME="getImage(java.net.URL)"><!-- --></A><H3>
getImage</H3>
<PRE>
public static <A HREF="../../../../../com/lowagie/text/Image.html" title="class in com.lowagie.text">Image</A> <B>getImage</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html?is-external=true" title="class or interface in java.net">URL</A>&nbsp;url)
                      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 a PNG from an url.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>url</CODE> - the url
<DT><B>Returns:</B><DD>the image
<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>
</DD>
</DL>
<HR>

<A NAME="getImage(java.io.InputStream)"><!-- --></A><H3>
getImage</H3>
<PRE>
public static <A HREF="../../../../../com/lowagie/text/Image.html" title="class in com.lowagie.text">Image</A> <B>getImage</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>Reads a PNG from a stream.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>is</CODE> - the stream
<DT><B>Returns:</B><DD>the image
<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>
</DD>
</DL>
<HR>

<A NAME="getImage(java.lang.String)"><!-- --></A><H3>
getImage</H3>
<PRE>
public static <A HREF="../../../../../com/lowagie/text/Image.html" title="class in com.lowagie.text">Image</A> <B>getImage</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;file)
                      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 a PNG from a file.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - the file
<DT><B>Returns:</B><DD>the image
<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>
</DD>
</DL>
<HR>

<A NAME="getImage(byte[])"><!-- --></A><H3>
getImage</H3>
<PRE>
public static <A HREF="../../../../../com/lowagie/text/Image.html" title="class in com.lowagie.text">Image</A> <B>getImage</B>(byte[]&nbsp;data)
                      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 a PNG from a byte array.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - the byte array
<DT><B>Returns:</B><DD>the image
<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>
</DD>
</DL>
<HR>

<A NAME="checkMarker(java.lang.String)"><!-- --></A><H3>
checkMarker</H3>
<PRE>
boolean <B>checkMarker</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;s)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="readPng()"><!-- --></A><H3>
readPng</H3>
<PRE>
void <B>readPng</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="getColorspace()"><!-- --></A><H3>
getColorspace</H3>
<PRE>
<A HREF="../../../../../com/lowagie/text/pdf/PdfObject.html" title="class in com.lowagie.text.pdf">PdfObject</A> <B>getColorspace</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getImage()"><!-- --></A><H3>
getImage</H3>
<PRE>
<A HREF="../../../../../com/lowagie/text/Image.html" title="class in com.lowagie.text">Image</A> <B>getImage</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="decodeIdat()"><!-- --></A><H3>
decodeIdat</H3>
<PRE>
void <B>decodeIdat</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="decodePass(int, int, int, int, int, int)"><!-- --></A><H3>
decodePass</H3>
<PRE>
void <B>decodePass</B>(int&nbsp;xOffset,
                int&nbsp;yOffset,
                int&nbsp;xStep,
                int&nbsp;yStep,
                int&nbsp;passWidth,
                int&nbsp;passHeight)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="processPixels(byte[], int, int, int, int)"><!-- --></A><H3>
processPixels</H3>
<PRE>
void <B>processPixels</B>(byte[]&nbsp;curr,
                   int&nbsp;xOffset,
                   int&nbsp;step,
                   int&nbsp;y,
                   int&nbsp;width)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getPixel(byte[], int, int, int, int)"><!-- --></A><H3>
getPixel</H3>
<PRE>
static int <B>getPixel</B>(byte[]&nbsp;image,
                    int&nbsp;x,
                    int&nbsp;y,
                    int&nbsp;bitDepth,
                    int&nbsp;bytesPerRow)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="setPixel(byte[], int[], int, int, int, int, int, int)"><!-- --></A><H3>
setPixel</H3>
<PRE>
static void <B>setPixel</B>(byte[]&nbsp;image,
                     int[]&nbsp;data,
                     int&nbsp;offset,
                     int&nbsp;size,
                     int&nbsp;x,
                     int&nbsp;y,
                     int&nbsp;bitDepth,
                     int&nbsp;bytesPerRow)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getPixel(byte[])"><!-- --></A><H3>
getPixel</H3>
<PRE>
int[] <B>getPixel</B>(byte[]&nbsp;curr)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="decodeSubFilter(byte[], int, int)"><!-- --></A><H3>
decodeSubFilter</H3>
<PRE>
private static void <B>decodeSubFilter</B>(byte[]&nbsp;curr,
                                    int&nbsp;count,
                                    int&nbsp;bpp)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="decodeUpFilter(byte[], byte[], int)"><!-- --></A><H3>
decodeUpFilter</H3>
<PRE>
private static void <B>decodeUpFilter</B>(byte[]&nbsp;curr,
                                   byte[]&nbsp;prev,
                                   int&nbsp;count)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="decodeAverageFilter(byte[], byte[], int, int)"><!-- --></A><H3>
decodeAverageFilter</H3>
<PRE>
private static void <B>decodeAverageFilter</B>(byte[]&nbsp;curr,
                                        byte[]&nbsp;prev,
                                        int&nbsp;count,
                                        int&nbsp;bpp)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="paethPredictor(int, int, int)"><!-- --></A><H3>
paethPredictor</H3>
<PRE>
private static int <B>paethPredictor</B>(int&nbsp;a,
                                  int&nbsp;b,
                                  int&nbsp;c)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="decodePaethFilter(byte[], byte[], int, int)"><!-- --></A><H3>
decodePaethFilter</H3>
<PRE>
private static void <B>decodePaethFilter</B>(byte[]&nbsp;curr,
                                      byte[]&nbsp;prev,
                                      int&nbsp;count,
                                      int&nbsp;bpp)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getInt(java.io.InputStream)"><!-- --></A><H3>
getInt</H3>
<PRE>
public static final int <B>getInt</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>Gets an <CODE>int</CODE> from an <CODE>InputStream</CODE>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>is</CODE> - an <CODE>InputStream</CODE>
<DT><B>Returns:</B><DD>the value of an <CODE>int</CODE>
<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="getWord(java.io.InputStream)"><!-- --></A><H3>
getWord</H3>
<PRE>
public static final int <B>getWord</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>Gets a <CODE>word</CODE> from an <CODE>InputStream</CODE>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>is</CODE> - an <CODE>InputStream</CODE>
<DT><B>Returns:</B><DD>the value of an <CODE>int</CODE>
<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="getString(java.io.InputStream)"><!-- --></A><H3>
getString</H3>
<PRE>
public static final <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>getString</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>Gets a <CODE>String</CODE> from an <CODE>InputStream</CODE>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>is</CODE> - an <CODE>InputStream</CODE>
<DT><B>Returns:</B><DD>the value of an <CODE>int</CODE>
<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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