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104 lines
3.9 KiB
Java
104 lines
3.9 KiB
Java
/*
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* Copyright (c) 2002 Lightweight Java Game Library Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'Light Weight Java Game Library' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.input;
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import org.lwjgl.Sys;
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import java.nio.IntBuffer;
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/**
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* $Id$
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*
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* A class representing a native cursor. Instances of this
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* class can be used with Mouse.setCursor(), if available.
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*
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @version $Revision$
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*/
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public class Cursor {
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static {
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System.loadLibrary(Sys.getLibraryName());
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}
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/**
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* The native handle to the cursor
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*/
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private final int nativeHandle;
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/**
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* Constructs a new Cursor, with the given parameters. Mouse must have been created before you can create
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* Cursor objects. Cursor images are in ARGB format, but only one bit transparancy is guaranteed to be supported.
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* So to maximize portability, lwjgl applications should only create cursor images with 0x00 or 0xff as alpha values.
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* The constructor will copy the images and delays, so there's no need to keep them around.
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*
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* @param width cursor image width
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* @param height cursor image height
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* @param xHotspot the x coordinate of the cursor hotspot
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* @param yHotspot the y coordinate of the cursor hotspot
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* @param numImages number of cursor images specified. Must be 1 if animations are not supported.
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* @param images A buffer containing the images
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* @param delays An int buffer of animation frame delays, if numImages is greater than 1, else null
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* @throws Exception if the cursor could not be created for any reason
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*/
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public Cursor(int width, int height, int xHotspot, int yHotspot, int numImages, IntBuffer images, IntBuffer delays) throws Exception {
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assert Mouse.isCreated();
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nativeHandle = nCreateCursor(width, height, xHotspot, yHotspot, numImages, images, images.position(), delays, delays != null ? delays.position() : 0);
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}
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/**
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* Destroy the native cursor. Cursor must not be current.
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*/
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public void destroy() {
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nDestroyCursor(nativeHandle);
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}
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/**
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* Gets the native handle associated with the cursor object.
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*/
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public int getHandle() {
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return nativeHandle;
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}
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/**
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* Native method to create a native cursor
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*/
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private static native int nCreateCursor(int width, int height, int xHotspot, int yHotspot, int numImages, IntBuffer images, int images_offset, IntBuffer delays, int delays_offset);
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/**
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* Native method to destroy a native cursor
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*/
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private static native void nDestroyCursor(int handle);
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}
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