bufferedimage.html

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<A NAME="getAlphaRaster()"><!-- --></A><H3>
getAlphaRaster</H3>
<PRE>
public <A HREF="../../../java/awt/image/WritableRaster.html">WritableRaster</A> <B>getAlphaRaster</B>()</PRE>
<DL>
<DD>Returns a <code>WritableRaster</code> representing the alpha
 channel for <code>BufferedImage</code> objects
 with <code>ColorModel</code> objects that support a separate
 spatial alpha channel, such as <code>ComponentColorModel</code> and
 <code>DirectColorModel</code>.  Returns <code>null</code> if there
 is no alpha channel associated with the <code>ColorModel</code> in
 this image.  This method assumes that for all 
 <code>ColorModel</code> objects other than 
 <code>IndexColorModel</code>, if the <code>ColorModel</code> 
 supports alpha, there is a separate alpha channel
 which is stored as the last band of image data.
 If the image uses an <code>IndexColorModel</code> that
 has alpha in the lookup table, this method returns
 <code>null</code> since there is no spatially discrete alpha
 channel.  This method creates a new
 <code>WritableRaster</code>, but shares the data array.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a <code>WritableRaster</code> or <code>null</code> if this
          <code>BufferedImage</code> has no alpha channel associated
          with its <code>ColorModel</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="getRGB(int, int)"><!-- --></A><H3>
getRGB</H3>
<PRE>
public int <B>getRGB</B>(int&nbsp;x,
                  int&nbsp;y)</PRE>
<DL>
<DD>Returns an integer pixel in the default RGB color model
 (TYPE_INT_ARGB) and default sRGB colorspace.  Color
 conversion takes place if this default model does not match
 the image <code>ColorModel</code>.  There are only 8-bits of
 precision for each color component in the returned data when using
 this method.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x,&nbsp;y</CODE> - the coordinates of the pixel from which to get
          the pixel in the default RGB color model and sRGB
          color space<DT><B>Returns:</B><DD>an integer pixel in the default RGB color model and
          default sRGB colorspace.</DL>
</DD>
</DL>
<HR>

<A NAME="getRGB(int, int, int, int, int[], int, int)"><!-- --></A><H3>
getRGB</H3>
<PRE>
public int[] <B>getRGB</B>(int&nbsp;startX,
                    int&nbsp;startY,
                    int&nbsp;w,
                    int&nbsp;h,
                    int[]&nbsp;rgbArray,
                    int&nbsp;offset,
                    int&nbsp;scansize)</PRE>
<DL>
<DD>Returns an array of integer pixels in the default RGB color model
 (TYPE_INT_ARGB) and default sRGB color space,
 from a portion of the image data.  Color conversion takes
 place if the default model does not match the image 
 <code>ColorModel</code>.  There are only 8-bits of precision for
 each color component in the returned data when
 using this method.  With a specified coordinate (x,&nbsp;y) in the
 image, the ARGB pixel can be accessed in this way:
 <pre>
    pixel   = rgbArray[offset + (y-startY)*scansize + (x-startX)];
 </pre><DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>startX,&nbsp;</CODE> - startY the starting coordinates<DD><CODE>w</CODE> - width of region<DD><CODE>h</CODE> - height of region<DD><CODE>rgbArray</CODE> - if not <code>null</code>, the rgb pixels are 
          written here<DD><CODE>offset</CODE> - offset into the <code>rgbArray</code><DD><CODE>scansize</CODE> - scanline stride for the <code>rgbArray</code><DT><B>Returns:</B><DD>array of RGB pixels.<DT><B>Throws:</B><DD><CODE><code>IllegalArgumentException</code></CODE> - if an unknown
		datatype is specified</DL>
</DD>
</DL>
<HR>

<A NAME="setRGB(int, int, int)"><!-- --></A><H3>
setRGB</H3>
<PRE>
public void <B>setRGB</B>(int&nbsp;x,
                   int&nbsp;y,
                   int&nbsp;rgb)</PRE>
<DL>
<DD>Sets a pixel in this <code>BufferedImage</code> to the specified   
 RGB value. The pixel is assumed to be in the default RGB color
 model, TYPE_INT_ARGB, and default sRGB color space.  For images
 with an <code>IndexColorModel</code>, the index with the nearest
 color is chosen.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x,&nbsp;y</CODE> - the coordinates of the pixel to set<DD><CODE>rgb</CODE> - the RGB value</DL>
</DD>
</DL>
<HR>

<A NAME="setRGB(int, int, int, int, int[], int, int)"><!-- --></A><H3>
setRGB</H3>
<PRE>
public void <B>setRGB</B>(int&nbsp;startX,
                   int&nbsp;startY,
                   int&nbsp;w,
                   int&nbsp;h,
                   int[]&nbsp;rgbArray,
                   int&nbsp;offset,
                   int&nbsp;scansize)</PRE>
<DL>
<DD>Sets an array of integer pixels in the default RGB color model
 (TYPE_INT_ARGB) and default sRGB color space,
 into a portion of the image data.  Color conversion takes place
 if the default model does not match the image 
 <code>ColorModel</code>.  There are only 8-bits of precision for
 each color component in the returned data when
 using this method.  With a specified coordinate (x,&nbsp;y) in the   
 this image, the ARGB pixel can be accessed in this way:
 <pre>
    pixel   = rgbArray[offset + (y-startY)*scansize + (x-startX)];
 </pre>
 WARNING: No dithering takes place.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>startX,&nbsp;startY</CODE> - the starting coordinates<DD><CODE>w</CODE> - width of the region<DD><CODE>h</CODE> - height of the region<DD><CODE>rgbArray</CODE> - the rgb pixels<DD><CODE>offset</CODE> - offset into the <code>rgbArray</code><DD><CODE>scansize</CODE> - scanline stride for the <code>rgbArray</code></DL>
</DD>
</DL>
<HR>

<A NAME="getWidth()"><!-- --></A><H3>
getWidth</H3>
<PRE>
public int <B>getWidth</B>()</PRE>
<DL>
<DD>Returns the width of the <code>BufferedImage</code>.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../../java/awt/image/RenderedImage.html#getWidth()">getWidth</A></CODE> in interface <CODE><A HREF="../../../java/awt/image/RenderedImage.html">RenderedImage</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the width of this <code>BufferedImage</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="getHeight()"><!-- --></A><H3>
getHeight</H3>
<PRE>
public int <B>getHeight</B>()</PRE>
<DL>
<DD>Returns the height of the <code>BufferedImage</code>.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../../java/awt/image/RenderedImage.html#getHeight()">getHeight</A></CODE> in interface <CODE><A HREF="../../../java/awt/image/RenderedImage.html">RenderedImage</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the height of this <code>BufferedImage</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="getWidth(java.awt.image.ImageObserver)"><!-- --></A><H3>
getWidth</H3>
<PRE>
public int <B>getWidth</B>(<A HREF="../../../java/awt/image/ImageObserver.html">ImageObserver</A>&nbsp;observer)</PRE>
<DL>
<DD>Returns the actual width of the image.  If the width is not known
 yet then the <A HREF="../../../java/awt/image/ImageObserver.html"><CODE>ImageObserver</CODE></A> is notified later and 
 <code>-1</code> is returned.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../java/awt/Image.html#getWidth(java.awt.image.ImageObserver)">getWidth</A></CODE> in class <CODE><A HREF="../../../java/awt/Image.html">Image</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>observer</CODE> - the <code>ImageObserver</code> that receives
          information about the image<DT><B>Returns:</B><DD>the width of the image or <code>-1</code> if the width
          is not yet known.<DT><B>See Also: </B><DD><A HREF="../../../java/awt/Image.html#getHeight(java.awt.image.ImageObserver)"><CODE>Image.getHeight(ImageObserver)</CODE></A>, 
<A HREF="../../../java/awt/image/ImageObserver.html"><CODE>ImageObserver</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getHeight(java.awt.image.ImageObserver)"><!-- --></A><H3>
getHeight</H3>
<PRE>
public int <B>getHeight</B>(<A HREF="../../../java/awt/image/ImageObserver.html">ImageObserver</A>&nbsp;observer)</PRE>
<DL>
<DD>Returns the actual height of the image.  If the height is not known
 yet then the <code>ImageObserver</code> is notified later and
 <code>-1</code> is returned.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../java/awt/Image.html#getHeight(java.awt.image.ImageObserver)">getHeight</A></CODE> in class <CODE><A HREF="../../../java/awt/Image.html">Image</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>observer</CODE> - the <code>ImageObserver</code> that receives
          information about the image<DT><B>Returns:</B><DD>the height of the image or <code>-1</code> if the height
          is not yet known.<DT><B>See Also: </B><DD><A HREF="../../../java/awt/Image.html#getWidth(java.awt.image.ImageObserver)"><CODE>Image.getWidth(ImageObserver)</CODE></A>, 
<A HREF="../../../java/awt/image/ImageObserver.html"><CODE>ImageObserver</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getSource()"><!-- --></A><H3>
getSource</H3>
<PRE>
public <A HREF="../../../java/awt/image/ImageProducer.html">ImageProducer</A> <B>getSource</B>()</PRE>
<DL>
<DD>Returns the object that produces the pixels for the image.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../java/awt/Image.html#getSource()">getSource</A></CODE> in class <CODE><A HREF="../../../java/awt/Image.html">Image</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the <A HREF="../../../java/awt/image/ImageProducer.html"><CODE>ImageProducer</CODE></A> that is used to produce the
 pixels for this image.<DT><B>See Also: </B><DD><A HREF="../../../java/awt/image/ImageProducer.html"><CODE>ImageProducer</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getProperty(java.lang.String, java.awt.image.ImageObserver)"><!-- --></A><H3>
getProperty</H3>
<PRE>
public <A HREF="../../../java/lang/Object.html">Object</A> <B>getProperty</B>(<A HREF="../../../java/lang/String.html">String</A>&nbsp;name,
                          <A HREF="../../../java/awt/image/ImageObserver.html">ImageObserver</A>&nbsp;observer)</PRE>
<DL>
<DD>Returns a property of the image by name.  Individual property names
 are defined by the various image formats.  If a property is not
 defined for a particular image, this method returns the
 <code>UndefinedProperty</code> field.  If the properties
 for this image are not yet known, then this method returns
 <code>null</code> and the <code>ImageObserver</code> object is
 notified later.  The property name "comment" should be used to
 store an optional comment that can be presented to the user as a
 description of the image, its source, or its author.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../java/awt/Image.html#getProperty(java.lang.String, java.awt.image.ImageObserver)">getProperty</A></CODE> in class <CODE><A HREF="../../../java/awt/Image.html">Image</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the property name<DD><CODE>observer</CODE> - the <code>ImageObserver</code> that receives
  notification regarding image information<DT><B>Returns:</B><DD>an <A HREF="../../../java/lang/Object.html"><CODE>Object</CODE></A> that is the property referred to by the
          specified <code>name</code> or <code>null</code> if the   
          properties of this image are not yet known.<DT><B>See Also: </B><DD><A HREF="../../../java/awt/image/ImageObserver.html"><CODE>ImageObserver</CODE></A>, 
<A HREF="../../../java/awt/Image.html#UndefinedProperty"><CODE>Image.UndefinedProperty</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getProperty(java.lang.String)"><!-- --></A><H3>
getProperty</H3>
<PRE>
public <A HREF="../../../java/lang/Object.html">Object</A> <B>getProperty</B>(<A HREF="../../../java/lang/String.html">String</A>&nbsp;name)</PRE>
<DL>
<DD>Returns a property of the image by name.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../../java/awt/image/RenderedImage.html#getProperty(java.lang.String)">getProperty</A></CODE> in interface <CODE><A HREF="../../../java/awt/image/RenderedImage.html">RenderedImage</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the property name<DT><B>Returns:</B><DD>an <code>Object</code> that is the property referred to by
          the specified <code>name</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="