org.qtunes.core.util
Class ImageScaler

java.lang.Object
  org.qtunes.core.util.ImageScaler

public class ImageScaler
extends java.lang.Object

Utility class to scale an image to no larger than a specified size. Will cache images based on the checksum of their bytes, so that identical requests don't process the image more than once.

Method Summary

static ImageScaler	getInstance()
java.nio.ByteBuffer	getScaledImage(java.nio.ByteBuffer in, int maxwidth, int maxheight, java.lang.String format) Return a ByteBuffer containing rendered image.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static ImageScaler getInstance()

getScaledImage

public java.nio.ByteBuffer getScaledImage(java.nio.ByteBuffer in,
                                          int maxwidth,
                                          int maxheight,
                                          java.lang.String format)
                                   throws java.io.IOException

Return a ByteBuffer containing rendered image. The image will have a maximum dimension of maxwidth x maxheight - if the image supplied in "in" has to be scaled to meet that, the returned image will be in the requested format, otherwise the original image is returned. If the image can't be parsed or is null, this method returns null

Parameters:

in - a ByteBuffer containing a rendered Image, or null

maxwidth - the maximum width in pixels

maxheight - the maximum width in pixels

format - if the image has to be scaled, what format to create the saved image as

Returns:

a ByteBuffer containing a bitmap image no larger than the requestest size, or null

Throws:

java.io.IOException