| /* |
| * Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package sun.awt.image; |
| |
| import java.awt.image.DataBuffer; |
| import sun.java2d.SurfaceData; |
| import java.awt.Rectangle; |
| |
| /** |
| * This class extends {@code DataBuffer} and allows access to |
| * native data via the DataBuffer methods. Note that, unlike other |
| * DataBuffer classes, the data is not stored in this class but |
| * has been created and stored elsewhere and this class is used |
| * merely to access that data. Note also that this class subclasses |
| * from DataBuffer and not from any of the standard subclasses |
| * (e.g., DataBufferInt); those subclasses allow the user to |
| * get a pointer to the data and manipulate it directly. That |
| * operation may not be possible or wise with native data. |
| * One important use of this DataBuffer class is in accessing the |
| * data stored in an offscreen vram surface, such as that created |
| * by the createVolatileImage() method. |
| */ |
| |
| public class DataBufferNative extends DataBuffer |
| { |
| protected SurfaceData surfaceData; |
| protected int width; |
| |
| /** |
| * Constructor. The constructor of this object requires a |
| * SurfaceData object; that surfaceData object will be used |
| * to access the actual pixel data in native code. |
| */ |
| public DataBufferNative(SurfaceData sData, int type, int width, int height) { |
| super(type, width*height); |
| this.width = width; |
| this.surfaceData = sData; |
| } |
| |
| protected native int getElem(int x, int y, SurfaceData sData); |
| |
| /** |
| * getElem returns the pixel value for a given index into the |
| * dataBuffer array. The bank value is currently ignored (the |
| * type of data accessed through this class is not stored in |
| * separate banks). The x and y coordinates of a pixel are calculated |
| * from the index value and the native getElem() method is |
| * called with the internal surfaceData object. |
| */ |
| public int getElem(int bank, int i) { |
| return getElem(i % width, i / width, surfaceData); |
| } |
| |
| protected native void setElem(int x, int y, int val, SurfaceData sData); |
| |
| /** |
| * setElem sets the pixel value of a given index into the |
| * dataBuffer array. The bank value is currently ignored (the |
| * type of data accessed through this class is not stored in |
| * separate banks). The x and y coordinates of a pixel are calculated |
| * from the index value and the native setElem() method is |
| * called with the internal surfaceData object. |
| */ |
| public void setElem(int bank, int i, int val) { |
| setElem(i % width, i / width, val, surfaceData); |
| } |
| |
| } |