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<p>The IDAT chunk. Image data may be encoded using any of the <code>5</code> filter types defined by filter method <code>0</code> (None, Sub, Up, Average, Paeth).</p> <p>The IEND chunk. This chunk must be found in order for the image to be considered valid.</p> <h4>Ancillary Chunks</h4> <p>PNG defines several 'ancillary' chunks that may be present in a PNG image but are not critical for image decoding.</p> <p>The tRNS chunk. All implementations must support the tRNS chunk. This chunk is used to implement transparency without providing alpha channel data for each pixel. For color types <code>0</code> and <code>2</code>, a particular gray or RGB value is defined to be a transparent pixel. In this case, the implementation must treat pixels with this value as fully transparent. Pixel value comparison must be based on the actual pixel values using the original sample depth; that is, this comparison must be performed before the pixel values are resampled to reflect the display capabilities of the device. For color type <code>3</code> (indexed color), <code>8</code>-bit alpha values are potentially provided for each entry in the color palette. In this case, the implementation must treat pixels with an alpha value of <code>0</code> as fully transparent, and it must treat pixels with an alpha value of <code>255</code> as fully opaque. If rendering with alpha blending is supported, any pixels with intermediate alpha values must be carried through to the resulting image. If alpha blending is not supported, any pixels with intermediate alpha values must be replaced with fully transparent pixels.</p> <p>The implementation <em>may</em> (but is not required to) support any of the other ancillary chunks. The implementation <em>must</em> silently ignore any unsupported ancillary chunks that it encounters. The currently defined optional ancillary chunks are:</p> <PRE> cHRM gAMA hIST iCCP iTXt pHYs sBIT sPLT sRGB tEXt tIME zTXt </PRE> <h3>Reference</h3> <p><em>PNG (Portable Network Graphics) Specification, Version 1.0.</em> W3C Recommendation, October 1, 1996. http://www.w3.org/TR/REC-png.html. Also available as RFC 2083, http://www.ietf.org/rfc/rfc2083.txt.</p>
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<DT><B>Since: </B><DD>MIDP 1.0</DD>
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<B>Method Summary</B></FONT></TD>
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<CODE>static <A HREF="../../../javax/microedition/lcdui/Image.html">Image</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#createImage(byte[], int, int)">createImage</A></B>(byte[] imageData, int imageOffset, int imageLength)</CODE>
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Creates an immutable image which is decoded from the data stored in the specified byte array at the specified offset and length.</TD>
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<CODE>static <A HREF="../../../javax/microedition/lcdui/Image.html">Image</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#createImage(javax.microedition.lcdui.Image)">createImage</A></B>(<A HREF="../../../javax/microedition/lcdui/Image.html">Image</A> source)</CODE>
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Creates an immutable image from a source image.</TD>
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<CODE>static <A HREF="../../../javax/microedition/lcdui/Image.html">Image</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#createImage(javax.microedition.lcdui.Image, int, int, int, int, int)">createImage</A></B>(<A HREF="../../../javax/microedition/lcdui/Image.html">Image</A> image, int x, int y, int width, int height, int transform)</CODE>
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Creates an immutable image using pixel data from the specified region of a source image, transformed as specified.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../javax/microedition/lcdui/Image.html">Image</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#createImage(java.io.InputStream)">createImage</A></B>(<A HREF="../../../java/io/InputStream.html">InputStream</A> stream)</CODE>
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Creates an immutable image from decoded image data obtained from an <code>InputStream</code>.</TD>
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<CODE>static <A HREF="../../../javax/microedition/lcdui/Image.html">Image</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#createImage(int, int)">createImage</A></B>(int width, int height)</CODE>
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Creates a new, mutable image for off-screen drawing.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../javax/microedition/lcdui/Image.html">Image</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#createImage(java.lang.String)">createImage</A></B>(<A HREF="../../../java/lang/String.html">String</A> name)</CODE>
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Creates an immutable image from decoded image data obtained from the named resource.</TD>
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<CODE>static <A HREF="../../../javax/microedition/lcdui/Image.html">Image</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#createRGBImage(int[], int, int, boolean)">createRGBImage</A></B>(int[] rgb, int width, int height, boolean processAlpha)</CODE>
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Creates an immutable image from a sequence of ARGB values, specified as <code>0xAARRGGBB</code>.</TD>
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<CODE> <A HREF="../../../javax/microedition/lcdui/Graphics.html">Graphics</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#getGraphics()">getGraphics</A></B>()</CODE>
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Creates a new <code>Graphics</code> object that renders to this image.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#getHeight()">getHeight</A></B>()</CODE>
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Gets the height of the image in pixels.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#getRGB(int[], int, int, int, int, int, int)">getRGB</A></B>(int[] rgbData, int offset, int scanlength, int x, int y, int width, int height)</CODE>
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Obtains ARGB pixel data from the specified region of this image and stores it in the provided array of integers.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#getWidth()">getWidth</A></B>()</CODE>
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Gets the width of the image in pixels.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Image.html#isMutable()">isMutable</A></B>()</CODE>
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Check if this image is mutable.</TD>
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<TD><B>Methods inherited from class java.lang.<A HREF="../../../java/lang/Object.html">Object</A></B></TD>
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<TD><CODE><A HREF="../../../java/lang/Object.html#equals(java.lang.Object)">equals</A>, <A HREF="../../../java/lang/Object.html#getClass()">getClass</A>, <A HREF="../../../java/lang/Object.html#hashCode()">hashCode</A>, <A HREF="../../../java/lang/Object.html#notify()">notify</A>, <A HREF="../../../java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="../../../java/lang/Object.html#toString()">toString</A>, <A HREF="../../../java/lang/Object.html#wait()">wait</A>, <A HREF="../../../java/lang/Object.html#wait(long)">wait</A>, <A HREF="../../../java/lang/Object.html#wait(long, int)">wait</A></CODE></TD>
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<B>Method Detail</B></FONT></TD>
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<A NAME="createImage(int, int)"><!-- --></A><H3>
createImage</H3>
<PRE>
public static <A HREF="../../../javax/microedition/lcdui/Image.html">Image</A> <B>createImage</B>(int width, int height)</PRE>
<DL>
<DD>Creates a new, mutable image for off-screen drawing. Every pixel within the newly created image is white. The width and height of the image must both be greater than zero.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>width</CODE> - the width of the new image, in pixels<DD><CODE>height</CODE> - the height of the new image, in pixels<DT><B>Returns:</B><DD>the created image<DT><B>Throws:</B><DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if either <code>width</code> or <code>height</code> is zero or less</DL>
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