bundles/org.eclipse.swt/Eclipse SWT/photon/org/eclipse/swt/graphics/Cursor.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2008 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.graphics;


 import org.eclipse.swt.internal.photon.*;
 import org.eclipse.swt.*;

 /**
  * Instances of this class manage operating system resources that
  * specify the appearance of the on-screen pointer. To create a
  * cursor you specify the device and either a simple cursor style
  * describing one of the standard operating system provided cursors
  * or the image and mask data for the desired appearance.
  * <p>
  * Application code must explicitly invoke the <code>Cursor.dispose()</code>
  * method to release the operating system resources managed by each instance
  * when those instances are no longer required.
  * </p>
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>
  *   CURSOR_ARROW, CURSOR_WAIT, CURSOR_CROSS, CURSOR_APPSTARTING, CURSOR_HELP,
  *   CURSOR_SIZEALL, CURSOR_SIZENESW, CURSOR_SIZENS, CURSOR_SIZENWSE, CURSOR_SIZEWE,
  *   CURSOR_SIZEN, CURSOR_SIZES, CURSOR_SIZEE, CURSOR_SIZEW, CURSOR_SIZENE, CURSOR_SIZESE,
  *   CURSOR_SIZESW, CURSOR_SIZENW, CURSOR_UPARROW, CURSOR_IBEAM, CURSOR_NO, CURSOR_HAND
  * </dd>
  * </dl>
  * <p>
  * Note: Only one of the above styles may be specified.
  * </p>
  *
  * @see <a href="http://www.eclipse.org/swt/snippets/#cursor">Cursor snippets</a>
  * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
  */
 public final class Cursor extends Resource {

 	/**
 	 * the type to the OS cursor resource
 	 * (Warning: This field is platform dependent)
 	 * <p>
 	 * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
 	 * public API. It is marked public only so that it can be shared
 	 * within the packages provided by SWT. It is not available on all
 	 * platforms and should never be accessed from application code.
 	 * </p>
 	 *
 	 * @noreference This field is not intended to be referenced by clients.
 	 */
 	public int type;

 	/**
 	 * the handle to the OS cursor resource
 	 * (Warning: This field is platform dependent)
 	 * <p>
 	 * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
 	 * public API. It is marked public only so that it can be shared
 	 * within the packages provided by SWT. It is not available on all
 	 * platforms and should never be accessed from application code.
 	 * </p>
 	 *
 	 * @noreference This field is not intended to be referenced by clients.
 	 */
 	public int bitmap;

 Cursor(Device device) {
 	super(device);
 }

 /**
  * Constructs a new cursor given a device and a style
  * constant describing the desired cursor appearance.
  * <p>
  * You must dispose the cursor when it is no longer required.
  * </p>
  * NOTE:
  * It is recommended to use {@link org.eclipse.swt.widgets.Display#getSystemCursor(int)}
  * instead of using this constructor. This way you can avoid the
  * overhead of disposing the Cursor resource.
  *
  * @param device the device on which to allocate the cursor
  * @param style the style of cursor to allocate
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_INVALID_ARGUMENT - when an unknown style is specified</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
  * </ul>
  *
  * @see SWT#CURSOR_ARROW
  * @see SWT#CURSOR_WAIT
  * @see SWT#CURSOR_CROSS
  * @see SWT#CURSOR_APPSTARTING
  * @see SWT#CURSOR_HELP
  * @see SWT#CURSOR_SIZEALL
  * @see SWT#CURSOR_SIZENESW
  * @see SWT#CURSOR_SIZENS
  * @see SWT#CURSOR_SIZENWSE
  * @see SWT#CURSOR_SIZEWE
  * @see SWT#CURSOR_SIZEN
  * @see SWT#CURSOR_SIZES
  * @see SWT#CURSOR_SIZEE
  * @see SWT#CURSOR_SIZEW
  * @see SWT#CURSOR_SIZENE
  * @see SWT#CURSOR_SIZESE
  * @see SWT#CURSOR_SIZESW
  * @see SWT#CURSOR_SIZENW
  * @see SWT#CURSOR_UPARROW
  * @see SWT#CURSOR_IBEAM
  * @see SWT#CURSOR_NO
  * @see SWT#CURSOR_HAND
  */
 public Cursor(Device device, int style) {
 	super(device);
 	switch (style) {
 		case SWT.CURSOR_ARROW: 		type = OS.Ph_CURSOR_POINTER; break;
 		case SWT.CURSOR_WAIT: 		type = OS.Ph_CURSOR_CLOCK; break;
 		case SWT.CURSOR_HAND: 		type = OS.Ph_CURSOR_FINGER; break;
 		case SWT.CURSOR_CROSS: 		type = OS.Ph_CURSOR_CROSSHAIR; break;
 		case SWT.CURSOR_APPSTARTING:	type = OS.Ph_CURSOR_POINT_WAIT; break;
 		case SWT.CURSOR_HELP: 		type = OS.Ph_CURSOR_QUESTION_POINT; break;
 		case SWT.CURSOR_SIZEALL: 	type = OS.Ph_CURSOR_MOVE; break;
 		case SWT.CURSOR_SIZENESW: 	type = OS.Ph_CURSOR_MOVE; break;
 		case SWT.CURSOR_SIZENS: 	type = OS.Ph_CURSOR_DRAG_VERTICAL; break;
 		case SWT.CURSOR_SIZENWSE:	type = OS.Ph_CURSOR_MOVE; break;
 		case SWT.CURSOR_SIZEWE: 	type = OS.Ph_CURSOR_DRAG_HORIZONTAL; break;
 		case SWT.CURSOR_SIZEN: 		type = OS.Ph_CURSOR_DRAG_TOP; break;
 		case SWT.CURSOR_SIZES: 		type = OS.Ph_CURSOR_DRAG_BOTTOM; break;
 		case SWT.CURSOR_SIZEE: 		type = OS.Ph_CURSOR_DRAG_RIGHT; break;
 		case SWT.CURSOR_SIZEW: 		type = OS.Ph_CURSOR_DRAG_LEFT; break;
 		case SWT.CURSOR_SIZENE: 	type = OS.Ph_CURSOR_DRAG_TR; break;
 		case SWT.CURSOR_SIZESE: 	type = OS.Ph_CURSOR_DRAG_BR; break;
 		case SWT.CURSOR_SIZESW:		type = OS.Ph_CURSOR_DRAG_BL; break;
 		case SWT.CURSOR_SIZENW: 	type = OS.Ph_CURSOR_DRAG_TL; break;
 		case SWT.CURSOR_UPARROW: 	type = OS.Ph_CURSOR_FINGER; break;
 		case SWT.CURSOR_IBEAM: 		type = OS.Ph_CURSOR_INSERT; break;
 		case SWT.CURSOR_NO: 		type = OS.Ph_CURSOR_DONT; break;
 		default:
 			SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	if (type == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 	init();
 }

 /**
  * Constructs a new cursor given a device, image and mask
  * data describing the desired cursor appearance, and the x
  * and y coordinates of the <em>hotspot</em> (that is, the point
  * within the area covered by the cursor which is considered
  * to be where the on-screen pointer is "pointing").
  * <p>
  * The mask data is allowed to be null, but in this case the source
  * must be an ImageData representing an icon that specifies both
  * color data and mask data.
  * <p>
  * You must dispose the cursor when it is no longer required.
  * </p>
  *
  * @param device the device on which to allocate the cursor
  * @param source the color data for the cursor
  * @param mask the mask data for the cursor (or null)
  * @param hotspotX the x coordinate of the cursor's hotspot
  * @param hotspotY the y coordinate of the cursor's hotspot
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_NULL_ARGUMENT - if the source is null</li>
  *    <li>ERROR_NULL_ARGUMENT - if the mask is null and the source does not have a mask</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the source and the mask are not the same
  *          size, or if the hotspot is outside the bounds of the image</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
  * </ul>
  */
 public Cursor(Device device, ImageData source, ImageData mask, int hotspotX, int hotspotY) {
 	super(device);
 	if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	if (mask == null) {
 		if (source.getTransparencyType() != SWT.TRANSPARENCY_MASK) {
 			SWT.error(SWT.ERROR_NULL_ARGUMENT);
 		}
 		mask = source.getTransparencyMask();
 	}
 	/* Check the bounds. Mask must be the same size as source */
 	if (mask.width != source.width || mask.height != source.height) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	/* Check the hotspots */
 	if (hotspotX >= source.width || hotspotX < 0 ||
 		hotspotY >= source.height || hotspotY < 0) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	/* Convert to depth 1 */
 	mask = ImageData.convertMask(mask);
 	source = ImageData.convertMask(source);
 	type = OS.Ph_CURSOR_BITMAP;

 	short w = (short)source.width;
 	short h = (short)source.height;
 	ImageData mask1 = new ImageData(w, h, 1, source.palette);
 	ImageData mask2 = new ImageData(w, h, 1, mask.palette);
 	for (int y=0; y<h; y++) {
 		for (int x=0; x<w; x++) {
 			int mask1_pixel, src_pixel = source.getPixel(x, y);
 			int mask2_pixel, mask_pixel = mask.getPixel(x, y);
 			if (src_pixel == 0 && mask_pixel == 0) {
 				// BLACK
 				mask1_pixel = 0;
 				mask2_pixel = 1;
 			} else if (src_pixel == 0 && mask_pixel == 1) {
 				// WHITE - cursor color
 				mask1_pixel = 1;
 				mask2_pixel = 0;
 			} else if (src_pixel == 1 && mask_pixel == 0) {
 				// SCREEN
 				mask1_pixel = 0;
 				mask2_pixel = 0;
 			} else {
 				/*
 				* Feature in Photon. It is not possible to have
 				* the reverse screen case using the Photon support.
 				* Reverse screen will be the same as screen.
 				*/
 				// REVERSE SCREEN -> SCREEN
 				mask1_pixel = 0;
 				mask2_pixel = 0;
 			}
 			mask1.setPixel(x, y, mask1_pixel);
 			mask2.setPixel(x, y, mask2_pixel);
 		}
 	}

 	PhCursorDef_t cursor = new PhCursorDef_t();
 	cursor.size1_x = w;
 	cursor.size1_y = h;
 	cursor.offset1_x = (short)-hotspotX;
 	cursor.offset1_y = (short)-hotspotY;
 	cursor.bytesperline1 = (byte)mask1.bytesPerLine;
 	cursor.color1 = OS.Ph_CURSOR_DEFAULT_COLOR;
 	cursor.size2_x = w;
 	cursor.size2_y = h;
 	cursor.offset2_x = (short)-hotspotX;
 	cursor.offset2_y = (short)-hotspotY;
 	cursor.bytesperline2 = (byte)mask2.bytesPerLine;
 	cursor.color2 = 0x000000;
 	int mask1Size = cursor.bytesperline1 * cursor.size1_y;
 	int mask2Size = cursor.bytesperline2 * cursor.size2_y;
 	bitmap = OS.malloc(PhCursorDef_t.sizeof + mask1Size + mask2Size);
 	if (bitmap == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 	OS.memmove(bitmap, cursor, PhCursorDef_t.sizeof);
 	OS.memmove(bitmap + PhCursorDef_t.sizeof, mask1.data, mask1Size);
 	OS.memmove(bitmap + PhCursorDef_t.sizeof + mask1Size, mask2.data, mask2Size);
 	init();
 }

 /**
  * Constructs a new cursor given a device, image data describing
  * the desired cursor appearance, and the x and y coordinates of
  * the <em>hotspot</em> (that is, the point within the area
  * covered by the cursor which is considered to be where the
  * on-screen pointer is "pointing").
  * <p>
  * You must dispose the cursor when it is no longer required.
  * </p>
  *
  * @param device the device on which to allocate the cursor
  * @param source the image data for the cursor
  * @param hotspotX the x coordinate of the cursor's hotspot
  * @param hotspotY the y coordinate of the cursor's hotspot
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_NULL_ARGUMENT - if the image is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the hotspot is outside the bounds of the
  * 		 image</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
  * </ul>
  *
  * @since 3.0
  */
 public Cursor(Device device, ImageData source, int hotspotX, int hotspotY) {
 	super(device);
 	if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	if (hotspotX >= source.width || hotspotX < 0 ||
 		hotspotY >= source.height || hotspotY < 0) {
 		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	}
 	ImageData mask = source.getTransparencyMask();

 	/* Ensure depth is equal to 1 */
 	if (source.depth > 1) {
 		/* Create a destination image with no data */
 		ImageData newSource = new ImageData(
 			source.width, source.height, 1, ImageData.bwPalette(),
 			1, null, 0, null, null, -1, -1, 0, 0, 0, 0, 0);

 		byte[] newReds = new byte[]{0, (byte)255}, newGreens = newReds, newBlues = newReds;

 		/* Convert the source to a black and white image of depth 1 */
 		PaletteData palette = source.palette;
 		if (palette.isDirect) {
 			ImageData.blit(ImageData.BLIT_SRC,
 					source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, palette.redMask, palette.greenMask, palette.blueMask,
 					ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
 					newSource.data, newSource.depth, newSource.bytesPerLine, newSource.getByteOrder(), 0, 0, newSource.width, newSource.height, newReds, newGreens, newBlues,
 					false, false);
 		} else {
 			RGB[] rgbs = palette.getRGBs();
 			int length = rgbs.length;
 			byte[] srcReds = new byte[length];
 			byte[] srcGreens = new byte[length];
 			byte[] srcBlues = new byte[length];
 			for (int i = 0; i < rgbs.length; i++) {
 				RGB rgb = rgbs[i];
 				if (rgb == null) continue;
 				srcReds[i] = (byte)rgb.red;
 				srcGreens[i] = (byte)rgb.green;
 				srcBlues[i] = (byte)rgb.blue;
 			}
 			ImageData.blit(ImageData.BLIT_SRC,
 					source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, srcReds, srcGreens, srcBlues,
 					ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
 					newSource.data, newSource.depth, newSource.bytesPerLine, newSource.getByteOrder(), 0, 0, newSource.width, newSource.height, newReds, newGreens, newBlues,
 					false, false);
 		}
 		source = newSource;
 	}
 	type = OS.Ph_CURSOR_BITMAP;

 	short w = (short)source.width;
 	short h = (short)source.height;
 	ImageData mask1 = new ImageData(w, h, 1, source.palette);
 	ImageData mask2 = new ImageData(w, h, 1, mask.palette);
 	for (int y=0; y<h; y++) {
 		for (int x=0; x<w; x++) {
 			int mask1_pixel, src_pixel = source.getPixel(x, y);
 			int mask2_pixel, mask_pixel = mask.getPixel(x, y);
 			if (src_pixel == 0 && mask_pixel == 1) {
 				// BLACK
 				mask1_pixel = 0;
 				mask2_pixel = 1;
 			} else if (src_pixel == 1 && mask_pixel == 1) {
 				// WHITE - cursor color
 				mask1_pixel = 1;
 				mask2_pixel = 0;
 			} else if (src_pixel == 0 && mask_pixel == 0) {
 				// SCREEN
 				mask1_pixel = 0;
 				mask2_pixel = 0;
 			} else {
 				/*
 				* Feature in Photon. It is not possible to have
 				* the reverse screen case using the Photon support.
 				* Reverse screen will be the same as screen.
 				*/
 				// REVERSE SCREEN -> SCREEN
 				mask1_pixel = 0;
 				mask2_pixel = 0;
 			}
 			mask1.setPixel(x, y, mask1_pixel);
 			mask2.setPixel(x, y, mask2_pixel);
 		}
 	}

 	PhCursorDef_t cursor = new PhCursorDef_t();
 	cursor.size1_x = w;
 	cursor.size1_y = h;
 	cursor.offset1_x = (short)-hotspotX;
 	cursor.offset1_y = (short)-hotspotY;
 	cursor.bytesperline1 = (byte)mask1.bytesPerLine;
 	cursor.color1 = OS.Ph_CURSOR_DEFAULT_COLOR;
 	cursor.size2_x = w;
 	cursor.size2_y = h;
 	cursor.offset2_x = (short)-hotspotX;
 	cursor.offset2_y = (short)-hotspotY;
 	cursor.bytesperline2 = (byte)mask2.bytesPerLine;
 	cursor.color2 = 0x000000;
 	int mask1Size = cursor.bytesperline1 * cursor.size1_y;
 	int mask2Size = cursor.bytesperline2 * cursor.size2_y;
 	bitmap = OS.malloc(PhCursorDef_t.sizeof + mask1Size + mask2Size);
 	if (bitmap == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 	OS.memmove(bitmap, cursor, PhCursorDef_t.sizeof);
 	OS.memmove(bitmap + PhCursorDef_t.sizeof, mask1.data, mask1Size);
 	OS.memmove(bitmap + PhCursorDef_t.sizeof + mask1Size, mask2.data, mask2Size);
 	init();
 }

 void destroy() {
 	if (type == OS.Ph_CURSOR_BITMAP && bitmap != 0) {
 		OS.free(bitmap);
 	}
 	type = bitmap = 0;
 }

 /**
  * Compares the argument to the receiver, and returns true
  * if they represent the <em>same</em> object using a class
  * specific comparison.
  *
  * @param object the object to compare with this object
  * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
  *
  * @see #hashCode
  */
 public boolean equals (Object object) {
 	if (object == this) return true;
 	if (!(object instanceof Cursor)) return false;
 	Cursor cursor = (Cursor) object;
 	return device == cursor.device && type == cursor.type &&
 		bitmap == cursor.bitmap;
 }

 /**
  * Returns an integer hash code for the receiver. Any two
  * objects that return <code>true</code> when passed to
  * <code>equals</code> must return the same value for this
  * method.
  *
  * @return the receiver's hash
  *
  * @see #equals
  */
 public int hashCode () {
 	return bitmap ^ type;
 }

 /**
  * Returns <code>true</code> if the cursor has been disposed,
  * and <code>false</code> otherwise.
  * <p>
  * This method gets the dispose state for the cursor.
  * When a cursor has been disposed, it is an error to
  * invoke any other method (except {@link #dispose()}) using the cursor.
  *
  * @return <code>true</code> when the cursor is disposed and <code>false</code> otherwise
  */
 public boolean isDisposed() {
 	return type == 0;
 }

 public static Cursor photon_new(Device device, int type, int bitmap) {
 	Cursor cursor = new Cursor(device);
 	cursor.type = type;
 	cursor.bitmap = bitmap;
 	return cursor;
 }

 /**
  * Returns a string containing a concise, human-readable
  * description of the receiver.
  *
  * @return a string representation of the receiver
  */
 public String toString () {
 	if (isDisposed()) return "Cursor {*DISPOSED*}";
 	return "Cursor {" + type + "," + bitmap + "}";
 }

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2008 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.graphics;


	import org.eclipse.swt.internal.photon.*;
	import org.eclipse.swt.*;

	/**
	* Instances of this class manage operating system resources that
	* specify the appearance of the on-screen pointer. To create a
	* cursor you specify the device and either a simple cursor style
	* describing one of the standard operating system provided cursors
	* or the image and mask data for the desired appearance.
	* <p>
	* Application code must explicitly invoke the <code>Cursor.dispose()</code>
	* method to release the operating system resources managed by each instance
	* when those instances are no longer required.
	* </p>
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>
	* CURSOR_ARROW, CURSOR_WAIT, CURSOR_CROSS, CURSOR_APPSTARTING, CURSOR_HELP,
	* CURSOR_SIZEALL, CURSOR_SIZENESW, CURSOR_SIZENS, CURSOR_SIZENWSE, CURSOR_SIZEWE,
	* CURSOR_SIZEN, CURSOR_SIZES, CURSOR_SIZEE, CURSOR_SIZEW, CURSOR_SIZENE, CURSOR_SIZESE,
	* CURSOR_SIZESW, CURSOR_SIZENW, CURSOR_UPARROW, CURSOR_IBEAM, CURSOR_NO, CURSOR_HAND
	* </dd>
	* </dl>
	* <p>
	* Note: Only one of the above styles may be specified.
	* </p>
	*
	* @see <a href="http://www.eclipse.org/swt/snippets/#cursor">Cursor snippets</a>
	* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
	*/
	public final class Cursor extends Resource {

	/**
	* the type to the OS cursor resource
	* (Warning: This field is platform dependent)
	* <p>
	* <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
	* public API. It is marked public only so that it can be shared
	* within the packages provided by SWT. It is not available on all
	* platforms and should never be accessed from application code.
	* </p>
	*
	* @noreference This field is not intended to be referenced by clients.
	*/
	public int type;

	/**
	* the handle to the OS cursor resource
	* (Warning: This field is platform dependent)
	* <p>
	* <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
	* public API. It is marked public only so that it can be shared
	* within the packages provided by SWT. It is not available on all
	* platforms and should never be accessed from application code.
	* </p>
	*
	* @noreference This field is not intended to be referenced by clients.
	*/
	public int bitmap;

	Cursor(Device device) {
	super(device);
	}

	/**
	* Constructs a new cursor given a device and a style
	* constant describing the desired cursor appearance.
	* <p>
	* You must dispose the cursor when it is no longer required.
	* </p>
	* NOTE:
	* It is recommended to use {@link org.eclipse.swt.widgets.Display#getSystemCursor(int)}
	* instead of using this constructor. This way you can avoid the
	* overhead of disposing the Cursor resource.
	*
	* @param device the device on which to allocate the cursor
	* @param style the style of cursor to allocate
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_INVALID_ARGUMENT - when an unknown style is specified</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
	* </ul>
	*
	* @see SWT#CURSOR_ARROW
	* @see SWT#CURSOR_WAIT
	* @see SWT#CURSOR_CROSS
	* @see SWT#CURSOR_APPSTARTING
	* @see SWT#CURSOR_HELP
	* @see SWT#CURSOR_SIZEALL
	* @see SWT#CURSOR_SIZENESW
	* @see SWT#CURSOR_SIZENS
	* @see SWT#CURSOR_SIZENWSE
	* @see SWT#CURSOR_SIZEWE
	* @see SWT#CURSOR_SIZEN
	* @see SWT#CURSOR_SIZES
	* @see SWT#CURSOR_SIZEE
	* @see SWT#CURSOR_SIZEW
	* @see SWT#CURSOR_SIZENE
	* @see SWT#CURSOR_SIZESE
	* @see SWT#CURSOR_SIZESW
	* @see SWT#CURSOR_SIZENW
	* @see SWT#CURSOR_UPARROW
	* @see SWT#CURSOR_IBEAM
	* @see SWT#CURSOR_NO
	* @see SWT#CURSOR_HAND
	*/
	public Cursor(Device device, int style) {
	super(device);
	switch (style) {
	case SWT.CURSOR_ARROW: type = OS.Ph_CURSOR_POINTER; break;
	case SWT.CURSOR_WAIT: type = OS.Ph_CURSOR_CLOCK; break;
	case SWT.CURSOR_HAND: type = OS.Ph_CURSOR_FINGER; break;
	case SWT.CURSOR_CROSS: type = OS.Ph_CURSOR_CROSSHAIR; break;
	case SWT.CURSOR_APPSTARTING: type = OS.Ph_CURSOR_POINT_WAIT; break;
	case SWT.CURSOR_HELP: type = OS.Ph_CURSOR_QUESTION_POINT; break;
	case SWT.CURSOR_SIZEALL: type = OS.Ph_CURSOR_MOVE; break;
	case SWT.CURSOR_SIZENESW: type = OS.Ph_CURSOR_MOVE; break;
	case SWT.CURSOR_SIZENS: type = OS.Ph_CURSOR_DRAG_VERTICAL; break;
	case SWT.CURSOR_SIZENWSE: type = OS.Ph_CURSOR_MOVE; break;
	case SWT.CURSOR_SIZEWE: type = OS.Ph_CURSOR_DRAG_HORIZONTAL; break;
	case SWT.CURSOR_SIZEN: type = OS.Ph_CURSOR_DRAG_TOP; break;
	case SWT.CURSOR_SIZES: type = OS.Ph_CURSOR_DRAG_BOTTOM; break;
	case SWT.CURSOR_SIZEE: type = OS.Ph_CURSOR_DRAG_RIGHT; break;
	case SWT.CURSOR_SIZEW: type = OS.Ph_CURSOR_DRAG_LEFT; break;
	case SWT.CURSOR_SIZENE: type = OS.Ph_CURSOR_DRAG_TR; break;
	case SWT.CURSOR_SIZESE: type = OS.Ph_CURSOR_DRAG_BR; break;
	case SWT.CURSOR_SIZESW: type = OS.Ph_CURSOR_DRAG_BL; break;
	case SWT.CURSOR_SIZENW: type = OS.Ph_CURSOR_DRAG_TL; break;
	case SWT.CURSOR_UPARROW: type = OS.Ph_CURSOR_FINGER; break;
	case SWT.CURSOR_IBEAM: type = OS.Ph_CURSOR_INSERT; break;
	case SWT.CURSOR_NO: type = OS.Ph_CURSOR_DONT; break;
	default:
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	if (type == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	init();
	}

	/**
	* Constructs a new cursor given a device, image and mask
	* data describing the desired cursor appearance, and the x
	* and y coordinates of the <em>hotspot</em> (that is, the point
	* within the area covered by the cursor which is considered
	* to be where the on-screen pointer is "pointing").
	* <p>
	* The mask data is allowed to be null, but in this case the source
	* must be an ImageData representing an icon that specifies both
	* color data and mask data.
	* <p>
	* You must dispose the cursor when it is no longer required.
	* </p>
	*
	* @param device the device on which to allocate the cursor
	* @param source the color data for the cursor
	* @param mask the mask data for the cursor (or null)
	* @param hotspotX the x coordinate of the cursor's hotspot
	* @param hotspotY the y coordinate of the cursor's hotspot
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_NULL_ARGUMENT - if the source is null</li>
	* <li>ERROR_NULL_ARGUMENT - if the mask is null and the source does not have a mask</li>
	* <li>ERROR_INVALID_ARGUMENT - if the source and the mask are not the same
	* size, or if the hotspot is outside the bounds of the image</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
	* </ul>
	*/
	public Cursor(Device device, ImageData source, ImageData mask, int hotspotX, int hotspotY) {
	super(device);
	if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (mask == null) {
	if (source.getTransparencyType() != SWT.TRANSPARENCY_MASK) {
	SWT.error(SWT.ERROR_NULL_ARGUMENT);
	}
	mask = source.getTransparencyMask();
	}
	/* Check the bounds. Mask must be the same size as source */
	if (mask.width != source.width \|\| mask.height != source.height) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	/* Check the hotspots */
	if (hotspotX >= source.width \|\| hotspotX < 0 \|\|
	hotspotY >= source.height \|\| hotspotY < 0) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	/* Convert to depth 1 */
	mask = ImageData.convertMask(mask);
	source = ImageData.convertMask(source);
	type = OS.Ph_CURSOR_BITMAP;

	short w = (short)source.width;
	short h = (short)source.height;
	ImageData mask1 = new ImageData(w, h, 1, source.palette);
	ImageData mask2 = new ImageData(w, h, 1, mask.palette);
	for (int y=0; y<h; y++) {
	for (int x=0; x<w; x++) {
	int mask1_pixel, src_pixel = source.getPixel(x, y);
	int mask2_pixel, mask_pixel = mask.getPixel(x, y);
	if (src_pixel == 0 && mask_pixel == 0) {
	// BLACK
	mask1_pixel = 0;
	mask2_pixel = 1;
	} else if (src_pixel == 0 && mask_pixel == 1) {
	// WHITE - cursor color
	mask1_pixel = 1;
	mask2_pixel = 0;
	} else if (src_pixel == 1 && mask_pixel == 0) {
	// SCREEN
	mask1_pixel = 0;
	mask2_pixel = 0;
	} else {
	/*
	* Feature in Photon. It is not possible to have
	* the reverse screen case using the Photon support.
	* Reverse screen will be the same as screen.
	*/
	// REVERSE SCREEN -> SCREEN
	mask1_pixel = 0;
	mask2_pixel = 0;
	}
	mask1.setPixel(x, y, mask1_pixel);
	mask2.setPixel(x, y, mask2_pixel);
	}
	}

	PhCursorDef_t cursor = new PhCursorDef_t();
	cursor.size1_x = w;
	cursor.size1_y = h;
	cursor.offset1_x = (short)-hotspotX;
	cursor.offset1_y = (short)-hotspotY;
	cursor.bytesperline1 = (byte)mask1.bytesPerLine;
	cursor.color1 = OS.Ph_CURSOR_DEFAULT_COLOR;
	cursor.size2_x = w;
	cursor.size2_y = h;
	cursor.offset2_x = (short)-hotspotX;
	cursor.offset2_y = (short)-hotspotY;
	cursor.bytesperline2 = (byte)mask2.bytesPerLine;
	cursor.color2 = 0x000000;
	int mask1Size = cursor.bytesperline1 * cursor.size1_y;
	int mask2Size = cursor.bytesperline2 * cursor.size2_y;
	bitmap = OS.malloc(PhCursorDef_t.sizeof + mask1Size + mask2Size);
	if (bitmap == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	OS.memmove(bitmap, cursor, PhCursorDef_t.sizeof);
	OS.memmove(bitmap + PhCursorDef_t.sizeof, mask1.data, mask1Size);
	OS.memmove(bitmap + PhCursorDef_t.sizeof + mask1Size, mask2.data, mask2Size);
	init();
	}

	/**
	* Constructs a new cursor given a device, image data describing
	* the desired cursor appearance, and the x and y coordinates of
	* the <em>hotspot</em> (that is, the point within the area
	* covered by the cursor which is considered to be where the
	* on-screen pointer is "pointing").
	* <p>
	* You must dispose the cursor when it is no longer required.
	* </p>
	*
	* @param device the device on which to allocate the cursor
	* @param source the image data for the cursor
	* @param hotspotX the x coordinate of the cursor's hotspot
	* @param hotspotY the y coordinate of the cursor's hotspot
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_NULL_ARGUMENT - if the image is null</li>
	* <li>ERROR_INVALID_ARGUMENT - if the hotspot is outside the bounds of the
	* image</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a handle could not be obtained for cursor creation</li>
	* </ul>
	*
	* @since 3.0
	*/
	public Cursor(Device device, ImageData source, int hotspotX, int hotspotY) {
	super(device);
	if (source == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (hotspotX >= source.width \|\| hotspotX < 0 \|\|
	hotspotY >= source.height \|\| hotspotY < 0) {
	SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	ImageData mask = source.getTransparencyMask();

	/* Ensure depth is equal to 1 */
	if (source.depth > 1) {
	/* Create a destination image with no data */
	ImageData newSource = new ImageData(
	source.width, source.height, 1, ImageData.bwPalette(),
	1, null, 0, null, null, -1, -1, 0, 0, 0, 0, 0);

	byte[] newReds = new byte[]{0, (byte)255}, newGreens = newReds, newBlues = newReds;

	/* Convert the source to a black and white image of depth 1 */
	PaletteData palette = source.palette;
	if (palette.isDirect) {
	ImageData.blit(ImageData.BLIT_SRC,
	source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, palette.redMask, palette.greenMask, palette.blueMask,
	ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
	newSource.data, newSource.depth, newSource.bytesPerLine, newSource.getByteOrder(), 0, 0, newSource.width, newSource.height, newReds, newGreens, newBlues,
	false, false);
	} else {
	RGB[] rgbs = palette.getRGBs();
	int length = rgbs.length;
	byte[] srcReds = new byte[length];
	byte[] srcGreens = new byte[length];
	byte[] srcBlues = new byte[length];
	for (int i = 0; i < rgbs.length; i++) {
	RGB rgb = rgbs[i];
	if (rgb == null) continue;
	srcReds[i] = (byte)rgb.red;
	srcGreens[i] = (byte)rgb.green;
	srcBlues[i] = (byte)rgb.blue;
	}
	ImageData.blit(ImageData.BLIT_SRC,
	source.data, source.depth, source.bytesPerLine, source.getByteOrder(), 0, 0, source.width, source.height, srcReds, srcGreens, srcBlues,
	ImageData.ALPHA_OPAQUE, null, 0, 0, 0,
	newSource.data, newSource.depth, newSource.bytesPerLine, newSource.getByteOrder(), 0, 0, newSource.width, newSource.height, newReds, newGreens, newBlues,
	false, false);
	}
	source = newSource;
	}
	type = OS.Ph_CURSOR_BITMAP;

	short w = (short)source.width;
	short h = (short)source.height;
	ImageData mask1 = new ImageData(w, h, 1, source.palette);
	ImageData mask2 = new ImageData(w, h, 1, mask.palette);
	for (int y=0; y<h; y++) {
	for (int x=0; x<w; x++) {
	int mask1_pixel, src_pixel = source.getPixel(x, y);
	int mask2_pixel, mask_pixel = mask.getPixel(x, y);
	if (src_pixel == 0 && mask_pixel == 1) {
	// BLACK
	mask1_pixel = 0;
	mask2_pixel = 1;
	} else if (src_pixel == 1 && mask_pixel == 1) {
	// WHITE - cursor color
	mask1_pixel = 1;
	mask2_pixel = 0;
	} else if (src_pixel == 0 && mask_pixel == 0) {
	// SCREEN
	mask1_pixel = 0;
	mask2_pixel = 0;
	} else {
	/*
	* Feature in Photon. It is not possible to have
	* the reverse screen case using the Photon support.
	* Reverse screen will be the same as screen.
	*/
	// REVERSE SCREEN -> SCREEN
	mask1_pixel = 0;
	mask2_pixel = 0;
	}
	mask1.setPixel(x, y, mask1_pixel);
	mask2.setPixel(x, y, mask2_pixel);
	}
	}

	PhCursorDef_t cursor = new PhCursorDef_t();
	cursor.size1_x = w;
	cursor.size1_y = h;
	cursor.offset1_x = (short)-hotspotX;
	cursor.offset1_y = (short)-hotspotY;
	cursor.bytesperline1 = (byte)mask1.bytesPerLine;
	cursor.color1 = OS.Ph_CURSOR_DEFAULT_COLOR;
	cursor.size2_x = w;
	cursor.size2_y = h;
	cursor.offset2_x = (short)-hotspotX;
	cursor.offset2_y = (short)-hotspotY;
	cursor.bytesperline2 = (byte)mask2.bytesPerLine;
	cursor.color2 = 0x000000;
	int mask1Size = cursor.bytesperline1 * cursor.size1_y;
	int mask2Size = cursor.bytesperline2 * cursor.size2_y;
	bitmap = OS.malloc(PhCursorDef_t.sizeof + mask1Size + mask2Size);
	if (bitmap == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	OS.memmove(bitmap, cursor, PhCursorDef_t.sizeof);
	OS.memmove(bitmap + PhCursorDef_t.sizeof, mask1.data, mask1Size);
	OS.memmove(bitmap + PhCursorDef_t.sizeof + mask1Size, mask2.data, mask2Size);
	init();
	}

	void destroy() {
	if (type == OS.Ph_CURSOR_BITMAP && bitmap != 0) {
	OS.free(bitmap);
	}
	type = bitmap = 0;
	}

	/**
	* Compares the argument to the receiver, and returns true
	* if they represent the <em>same</em> object using a class
	* specific comparison.
	*
	* @param object the object to compare with this object
	* @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
	*
	* @see #hashCode
	*/
	public boolean equals (Object object) {
	if (object == this) return true;
	if (!(object instanceof Cursor)) return false;
	Cursor cursor = (Cursor) object;
	return device == cursor.device && type == cursor.type &&
	bitmap == cursor.bitmap;
	}

	/**
	* Returns an integer hash code for the receiver. Any two
	* objects that return <code>true</code> when passed to
	* <code>equals</code> must return the same value for this
	* method.
	*
	* @return the receiver's hash
	*
	* @see #equals
	*/
	public int hashCode () {
	return bitmap ^ type;
	}

	/**
	* Returns <code>true</code> if the cursor has been disposed,
	* and <code>false</code> otherwise.
	* <p>
	* This method gets the dispose state for the cursor.
	* When a cursor has been disposed, it is an error to
	* invoke any other method (except {@link #dispose()}) using the cursor.
	*
	* @return <code>true</code> when the cursor is disposed and <code>false</code> otherwise
	*/
	public boolean isDisposed() {
	return type == 0;
	}

	public static Cursor photon_new(Device device, int type, int bitmap) {
	Cursor cursor = new Cursor(device);
	cursor.type = type;
	cursor.bitmap = bitmap;
	return cursor;
	}

	/**
	* Returns a string containing a concise, human-readable
	* description of the receiver.
	*
	* @return a string representation of the receiver
	*/
	public String toString () {
	if (isDisposed()) return "Cursor {DISPOSED}";
	return "Cursor {" + type + "," + bitmap + "}";
	}

	}