File	Doc	Category	Size	Date	Package
ImageData.java	API Doc	phoneME MR2 API (J2ME)	6682	Wed May 02 18:00:08 BST 2007	javax.microedition.lcdui

ImageData

• java.lang.Object

Fields Summary
private int	width The width, height of this Image
private int	height
private boolean	isMutable If this Image is mutable.
private byte[]	pixelData Image pixel data byte array. If this is null, use nativePixelData and nativeAlphaData instead.
private byte[]	alphaData Image alpha data byte array. If pixelData is null, use nativePixelData instead.
private int	nativePixelData Image native romized pixel data. Set in native by loadRomizedImage(). Must remain 0 unless pixelData is null.
private int	nativeAlphaData Image native romized alpha data. Set in native by loadRomizedImage(). Must remain 0 unless pixelData is null.

Constructors Summary
ImageData() Constructs empty ImageData .
ImageData(int width, int height, boolean isMutable, boolean clearPixelData, boolean allocateAlpha) Constructs ImageData using passed in width and height. Alpha array is allocated if allocateAlpha is true. param width The width of the ImageData to be created. param height The height of the ImageData to be created. param isMutable true to create mutable ImageData, false to create immutable ImageData param clearPixelData if true pixel data whould be set to 0xff for each pixel param allocateAlpha true if alpha data should be allocated, false - if not. initImageData(width, height, isMutable, allocateAlpha); if (clearPixelData) { for (int i = 0; i < pixelData.length; i++) { pixelData[i] = (byte)0xFF; } }
ImageData(int width, int height, boolean isMutable, byte[] pixelData) Constructs mutable or immutable ImageData using passed in width, height and pixel data. param width The width of the ImageData to be created. param height The height of the ImageData to be created. param isMutable true to create mutable ImageData, false to create immutable ImageData param pixelData byte array that contains pixel data for the ImageData. this.width = width; this.height = height; this.isMutable = isMutable; int length = width * height * 2; byte[] newPixelData = new byte[length]; System.arraycopy(pixelData, 0, newPixelData, 0, length); this.pixelData = newPixelData;

Methods Summary
public int	getHeight() Gets the height of the image in pixels. The value returned must reflect the actual height of the image when rendered. return height of the image return height;
byte[]	getPixelData() Gets pixel data associated with this ImageData instance. return byte arra that represents pixel data associated with this ImageData instance. return pixelData;
public int	getWidth() Gets the width of the image in pixels. The value returned must reflect the actual width of the image when rendered. return width of the image return width;
public boolean	hasAlpha() Returns true if ImageData contains alpha data. return true if ImageData contains alpha data. return (alphaData != null || nativeAlphaData != 0);
void	initImageData(int width, int height, boolean isMutable, boolean allocateAlpha) Initializes mutable or immutable ImageData using passed in width, height. Alpha array is allocated if allocateAlpha is true. param width The width of the ImageData to be created. param height The height of the ImageData to be created. param isMutable true to create mutable ImageData, false to create immutable ImageData param allocateAlpha true if alpha data should be allocated, false - if not. this.width = width; this.height = height; this.isMutable = isMutable; pixelData = new byte[width * height * 2]; if (allocateAlpha) { alphaData = new byte[width * height]; } else { alphaData = null; }
public boolean	isMutable() Check if this image is mutable. Mutable images can be modified by rendering to them through a Graphics object obtained from the getGraphics() method of this object. return true if the image is mutable, false otherwise return isMutable;
public void	removeAlpha() Removes alpha data information alphaData = null;