/*
* Copyright (c) 1997, 2018, 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;
import sun.awt.CustomCursor;
import java.awt.*;
import java.awt.image.*;
import sun.awt.image.ImageRepresentation;
A class to encapsulate a custom image-based cursor.
Author: Thomas Ball See Also: - setCursor.setCursor
/**
* A class to encapsulate a custom image-based cursor.
*
* @see Component#setCursor
* @author Thomas Ball
*/
@SuppressWarnings("serial") // JDK-implementation class
public abstract class X11CustomCursor extends CustomCursor {
public X11CustomCursor(Image cursor, Point hotSpot, String name)
throws IndexOutOfBoundsException {
super(cursor, hotSpot, name);
}
protected void createNativeCursor(Image im, int[] pixels, int width, int height,
int xHotSpot, int yHotSpot) {
class CCount implements Comparable<CCount> {
int color;
int count;
public CCount(int cl, int ct) {
color = cl;
count = ct;
}
public int compareTo(CCount cc) {
return cc.count - count;
}
}
int[] tmp = new int[pixels.length];
for (int i=0; i<pixels.length; i++) {
if ((pixels[i] & 0xff000000) == 0) {
tmp[i] = -1;
} else {
tmp[i] = pixels[i] & 0x00ffffff;
}
}
java.util.Arrays.sort(tmp);
int fc = 0x000000;
int bc = 0xffffff;
CCount[] cols = new CCount[pixels.length];
int is = 0;
int numColors = 0;
while ( is < pixels.length ) {
if (tmp[is] != -1) {
cols[numColors++] = new CCount(tmp[is], 1);
break;
}
is ++;
}
for (int i = is+1; i < pixels.length; i++) {
if (tmp[i] != cols[numColors-1].color) {
cols[numColors++] = new CCount(tmp[i], 1);
} else {
cols[numColors-1].count ++;
}
}
java.util.Arrays.sort(cols, 0, numColors);
if (numColors > 0) fc = cols[0].color;
int fcr = (fc >> 16) & 0x000000ff;
int fcg = (fc >> 8) & 0x000000ff;
int fcb = (fc >> 0) & 0x000000ff;
int rdis = 0;
int gdis = 0;
int bdis = 0;
for (int j = 1; j < numColors; j++) {
int rr = (cols[j].color >> 16) & 0x000000ff;
int gg = (cols[j].color >> 8) & 0x000000ff;
int bb = (cols[j].color >> 0) & 0x000000ff;
rdis = rdis + cols[j].count * rr;
gdis = gdis + cols[j].count * gg;
bdis = bdis + cols[j].count * bb;
}
int rest = pixels.length - ((numColors > 0) ? cols[0].count : 0);
// 4653170 Avoid divide / zero exception
if (rest > 0) {
rdis = rdis / rest - fcr;
gdis = gdis / rest - fcg;
bdis = bdis / rest - fcb;
}
rdis = (rdis*rdis + gdis*gdis + bdis*bdis) / 2;
// System.out.println(" rdis is "+ rdis);
for (int j = 1; j < numColors; j++) {
int rr = (cols[j].color >> 16) & 0x000000ff;
int gg = (cols[j].color >> 8) & 0x000000ff;
int bb = (cols[j].color >> 0) & 0x000000ff;
if ( (rr-fcr)*(rr-fcr) + (gg-fcg)*(gg-fcg) + (bb-fcb)*(bb-fcb)
>= rdis ) {
bc = cols[j].color;
break;
}
}
int bcr = (bc >> 16) & 0x000000ff;
int bcg = (bc >> 8) & 0x000000ff;
int bcb = (bc >> 0) & 0x000000ff;
// On Solaris 2.5.x, the above code for cursor of any size runs fine
// but on Solaris 2.6, the width of a cursor has to be 8 divisible,
// otherwise, the cursor could be displayed as garbaged.
// To work around the 2.6 problem, the following code pads any cursor
// with a transparent area to make a new cursor of width 8 multiples.
// --- Bug 4148455
int wNByte = (width + 7)/8;
int tNByte = wNByte * height;
byte[] xorMask = new byte[tNByte];
byte[] andMask = new byte[tNByte];
for (int i = 0; i < width; i++) {
int omask = 1 << (i % 8);
for (int j = 0; j < height; j++) {
int ip = j*width + i;
int ibyte = j*wNByte + i/8;
if ((pixels[ip] & 0xff000000) != 0) {
andMask[ibyte] |= omask;
}
int pr = (pixels[ip] >> 16) & 0x000000ff;
int pg = (pixels[ip] >> 8) & 0x000000ff;
int pb = (pixels[ip] >> 0) & 0x000000ff;
if ( (pr-fcr)*(pr-fcr) + (pg-fcg)*(pg-fcg) + (pb-fcb)*(pb-fcb)
<= (pr-bcr)*(pr-bcr) + (pg-bcg)*(pg-bcg) + (pb-bcb)*(pb-bcb) ) {
// show foreground color
xorMask[ibyte] |= omask;
}
}
}
createCursor(xorMask, andMask, 8*wNByte, height, fc, bc, xHotSpot, yHotSpot);
}
protected abstract void createCursor(byte[] xorMask, byte[] andMask,
int width, int height,
int fcolor, int bcolor,
int xHotSpot, int yHotSpot);
}