/*
* @(#)ImageGraphicAttribute.java 1.18 06/02/14
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
/*
* (C) Copyright Taligent, Inc. 1996 - 1997, All Rights Reserved
* (C) Copyright IBM Corp. 1996 - 1998, All Rights Reserved
*
* The original version of this source code and documentation is
* copyrighted and owned by Taligent, Inc., a wholly-owned subsidiary
* of IBM. These materials are provided under terms of a License
* Agreement between Taligent and Sun. This technology is protected
* by multiple US and International patents.
*
* This notice and attribution to Taligent may not be removed.
* Taligent is a registered trademark of Taligent, Inc.
*
*/
package java.awt.font;
import java.awt.Image;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
/**
* The <code>ImageGraphicAttribute</code> class is an implementation of
* {@link GraphicAttribute} which draws images in
* a {@link TextLayout}.
* @see GraphicAttribute
*/
public final class ImageGraphicAttribute extends GraphicAttribute {
private Image fImage;
private float fImageWidth, fImageHeight;
private float fOriginX, fOriginY;
/**
* Constucts an <code>ImageGraphicAttribute</code> from the specified
* {@link Image}. The origin is at (0, 0).
* @param image the <code>Image</code> rendered by this
* <code>ImageGraphicAttribute</code>.
* This object keeps a reference to <code>image</code>.
* @param alignment one of the alignments from this
* <code>ImageGraphicAttribute</code>
*/
public ImageGraphicAttribute(Image image, int alignment) {
this(image, alignment, 0, 0);
}
/**
* Constructs an <code>ImageGraphicAttribute</code> from the specified
* <code>Image</code>. The point
* (<code>originX</code>, <code>originY</code>) in the
* <code>Image</code> appears at the origin of the
* <code>ImageGraphicAttribute</code> within the text.
* @param image the <code>Image</code> rendered by this
* <code>ImageGraphicAttribute</code>.
* This object keeps a reference to <code>image</code>.
* @param alignment one of the alignments from this
* <code>ImageGraphicAttribute</code>
* @param originX the X coordinate of the point within
* the <code>Image</code> that appears at the origin of the
* <code>ImageGraphicAttribute</code> in the text line.
* @param originY the Y coordinate of the point within
* the <code>Image</code> that appears at the origin of the
* <code>ImageGraphicAttribute</code> in the text line.
*/
public ImageGraphicAttribute(Image image,
int alignment,
float originX,
float originY) {
super(alignment);
// Can't clone image
// fImage = (Image) image.clone();
fImage = image;
fImageWidth = image.getWidth(null);
fImageHeight = image.getHeight(null);
// ensure origin is in Image?
fOriginX = originX;
fOriginY = originY;
}
/**
* Returns the ascent of this <code>ImageGraphicAttribute</code>. The
* ascent of an <code>ImageGraphicAttribute</code> is the distance
* from the top of the image to the origin.
* @return the ascent of this <code>ImageGraphicAttribute</code>.
*/
public float getAscent() {
return Math.max(0, fOriginY);
}
/**
* Returns the descent of this <code>ImageGraphicAttribute</code>.
* The descent of an <code>ImageGraphicAttribute</code> is the
* distance from the origin to the bottom of the image.
* @return the descent of this <code>ImageGraphicAttribute</code>.
*/
public float getDescent() {
return Math.max(0, fImageHeight-fOriginY);
}
/**
* Returns the advance of this <code>ImageGraphicAttribute</code>.
* The advance of an <code>ImageGraphicAttribute</code> is the
* distance from the origin to the right edge of the image.
* @return the advance of this <code>ImageGraphicAttribute</code>.
*/
public float getAdvance() {
return Math.max(0, fImageWidth-fOriginX);
}
/**
* Returns a {@link Rectangle2D} that encloses all of the
* bits rendered by this <code>ImageGraphicAttribute</code>, relative
* to the rendering position. A graphic can be rendered beyond its
* origin, ascent, descent, or advance; but if it is, this
* method's implementation must indicate where the graphic is rendered.
* @return a <code>Rectangle2D</code> that encloses all of the bits
* rendered by this <code>ImageGraphicAttribute</code>.
*/
public Rectangle2D getBounds() {
return new Rectangle2D.Float(
-fOriginX, -fOriginY, fImageWidth, fImageHeight);
}
/**
* {@inheritDoc}
*/
public void draw(Graphics2D graphics, float x, float y) {
graphics.drawImage(fImage, (int) (x-fOriginX), (int) (y-fOriginY), null);
}
/**
* Returns a hashcode for this <code>ImageGraphicAttribute</code>.
* @return a hash code value for this object.
*/
public int hashCode() {
return fImage.hashCode();
}
/**
* Compares this <code>ImageGraphicAttribute</code> to the specified
* {@link Object}.
* @param rhs the <code>Object</code> to compare for equality
* @return <code>true</code> if this
* <code>ImageGraphicAttribute</code> equals <code>rhs</code>;
* <code>false</code> otherwise.
*/
public boolean equals(Object rhs) {
try {
return equals((ImageGraphicAttribute) rhs);
}
catch(ClassCastException e) {
return false;
}
}
/**
* Compares this <code>ImageGraphicAttribute</code> to the specified
* <code>ImageGraphicAttribute</code>.
* @param rhs the <code>ImageGraphicAttribute</code> to compare for
* equality
* @return <code>true</code> if this
* <code>ImageGraphicAttribute</code> equals <code>rhs</code>;
* <code>false</code> otherwise.
*/
public boolean equals(ImageGraphicAttribute rhs) {
if (rhs == null) {
return false;
}
if (this == rhs) {
return true;
}
if (fOriginX != rhs.fOriginX || fOriginY != rhs.fOriginY) {
return false;
}
if (getAlignment() != rhs.getAlignment()) {
return false;
}
if (!fImage.equals(rhs.fImage)) {
return false;
}
return true;
}
}
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