Here you can find the source of transformToolIcon(BufferedImage source, int width, int height)
public static BufferedImage transformToolIcon(BufferedImage source, int width, int height)
//package com.java2s; /*// ww w . j a v a2s. c om * Collab desktop - Software for shared drawing via internet in real-time * Copyright (C) 2012 Martin Indra <aktive@seznam.cz> * * This file is part of Collab desktop. * * Collab desktop is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Collab desktop 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 for more details. * * You should have received a copy of the GNU General Public License * along with Collab desktop. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.image.BufferedImage; public class Main { public static BufferedImage transformToolIcon(BufferedImage source, int width, int height) { BufferedImage result = source; int rw = result.getWidth(); int rh = result.getHeight(); if (rw != width || rh != height) { float scale = Math.min((float) (width / rw), (float) (height / rh)); int nw = (int) (rw * scale); int nh = (int) (rh * scale); int x = 0, y = 0; if (nw < width) { x = (width - nw) / 2; } if (nh < height) { y = (height - nh) / 2; } result = new BufferedImage(width, height, source.getType()); Graphics2D g = (Graphics2D) result.getGraphics(); g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g.drawImage(source, x, y, nw, nh, null); g.dispose(); } return result; } }