237 lines
7.9 KiB
Java
237 lines
7.9 KiB
Java
/*
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* Copyright (c) 2002-2004 LWJGL 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 'LWJGL' 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.util;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Comparator;
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import org.lwjgl.LWJGLUtil;
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import org.lwjgl.LWJGLException;
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import org.lwjgl.opengl.DisplayMode;
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/**
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* $Id$
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* Display initialization utility, that can be used to find display modes and pick
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* one for you based on your criteria.
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* @author $Author$
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* @version $Revision$
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*/
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public final class Display {
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private static final boolean DEBUG = false;
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/**
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* Determine the available display modes that match the specified minimum and maximum criteria.
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* If any given criterium is specified as -1 then it is ignored.
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*
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* @param minWidth the minimum display resolution in pixels
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* @param minHeight the minimum display resolution in pixels
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* @param maxWidth the maximum display resolution in pixels
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* @param maxHeight the maximum display resolution in pixels
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* @param minBPP the minimum bit depth per pixel
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* @param maxBPP the maximum bit depth per pixel
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* @param minFreq the minimum display frequency in Hz
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* @param maxFreq the maximum display frequency in Hz
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* @return an array of matching display modes
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*/
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public static DisplayMode[] getAvailableDisplayModes(int minWidth, int minHeight, int maxWidth, int maxHeight, int minBPP, int maxBPP,
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int minFreq, int maxFreq) throws LWJGLException
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{
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// First get the available display modes
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DisplayMode[] modes = org.lwjgl.opengl.Display.getAvailableDisplayModes();
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if (LWJGLUtil.DEBUG || DEBUG) {
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System.out.println("Available screen modes:");
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for (int i = 0; i < modes.length; i ++) {
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System.out.println(modes[i]);
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}
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}
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ArrayList matches = new ArrayList(modes.length);
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for (int i = 0; i < modes.length; i ++) {
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assert modes[i] != null : ""+i+" "+modes.length;
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if (minWidth != -1 && modes[i].getWidth() < minWidth)
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continue;
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if (maxWidth != -1 && modes[i].getWidth() > maxWidth)
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continue;
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if (minHeight != -1 && modes[i].getHeight() < minHeight)
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continue;
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if (maxHeight != -1 && modes[i].getHeight() > maxHeight)
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continue;
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if (minBPP != -1 && modes[i].getBitsPerPixel() < minBPP)
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continue;
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if (maxBPP != -1 && modes[i].getBitsPerPixel() > maxBPP)
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continue;
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//if (modes[i].bpp == 24)
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// continue;
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if (modes[i].getFrequency() != 0) {
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if (minFreq != -1 && modes[i].getFrequency() < minFreq)
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continue;
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if (maxFreq != -1 && modes[i].getFrequency() > maxFreq)
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continue;
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}
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matches.add(modes[i]);
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}
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DisplayMode[] ret = new DisplayMode[matches.size()];
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matches.toArray(ret);
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if (LWJGLUtil.DEBUG && DEBUG) {
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System.out.println("Filtered screen modes:");
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for (int i = 0; i < ret.length; i ++) {
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System.out.println(ret[i]);
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}
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}
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return ret;
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}
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/**
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* Create the display by choosing from a list of display modes based on an order of preference.
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* You must supply a list of allowable display modes, probably by calling getAvailableDisplayModes(),
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* and an array with the order in which you would like them sorted in descending order.
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* This method attempts to create the topmost display mode; if that fails, it will try the next one,
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* and so on, until there are no modes left. If no mode is set at the end, an exception is thrown.
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* @param dm a list of display modes to choose from
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* @param param the names of the DisplayMode fields in the order in which you would like them sorted.
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* @return the chosen display mode
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* @throws NoSuchFieldException if one of the params is not a field in DisplayMode
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* @throws Exception if no display mode could be set
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* @see org.lwjgl.DisplayMode
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*/
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public static DisplayMode setDisplayMode(DisplayMode[] dm, final String[] param) throws Exception {
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class Sorter implements Comparator {
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final Field[] field;
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final int[] order;
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final boolean[] usePreferred;
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final int[] preferred;
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Sorter() throws NoSuchFieldException {
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field = new Field[param.length];
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order = new int[param.length];
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preferred = new int[param.length];
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usePreferred = new boolean[param.length];
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for (int i = 0; i < field.length; i ++) {
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int idx = param[i].indexOf('=');
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if (idx > 0) {
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preferred[i] = Integer.parseInt(param[i].substring(idx + 1, param[i].length()));
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usePreferred[i] = true;
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param[i] = param[i].substring(0, idx);
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field[i] = DisplayMode.class.getDeclaredField(param[i]);
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} else if (param[i].charAt(0) == '-') {
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field[i] = DisplayMode.class.getDeclaredField(param[i].substring(1));
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order[i] = -1;
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} else {
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field[i] = DisplayMode.class.getDeclaredField(param[i]);
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order[i] = 1;
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}
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field[i].setAccessible(true);
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}
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}
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/**
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* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
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*/
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public int compare(Object o1, Object o2) {
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DisplayMode dm1 = (DisplayMode) o1;
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DisplayMode dm2 = (DisplayMode) o2;
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for (int i = 0; i < field.length; i ++) {
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try {
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int f1 = field[i].getInt(dm1);
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int f2 = field[i].getInt(dm2);
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if (usePreferred[i] && f1 != f2) {
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if (f1 == preferred[i])
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return -1;
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else if (f2 == preferred[i])
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return 1;
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else {
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// Score according to the difference between the values
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int absf1 = Math.abs(f1 - preferred[i]);
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int absf2 = Math.abs(f2 - preferred[i]);
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if (absf1 < absf2)
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return -1;
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else if (absf1 > absf2)
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return 1;
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else
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continue;
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}
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} else if (f1 < f2)
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return order[i];
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else if (f1 == f2)
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continue;
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else
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return -order[i];
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} catch (IllegalAccessException e) {
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throw new RuntimeException(e);
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}
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}
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return 0;
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}
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}
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// Sort the display modes
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Arrays.sort(dm, new Sorter());
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// Try them out in the appropriate order
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if (LWJGLUtil.DEBUG || DEBUG) {
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System.out.println("Sorted display modes:");
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for (int i = 0; i < dm.length; i ++) {
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System.out.println(dm[i]);
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}
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}
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for (int i = 0; i < dm.length; i ++) {
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try {
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if (LWJGLUtil.DEBUG || DEBUG)
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System.out.println("Attempting to set displaymode: "+dm[i]);
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org.lwjgl.opengl.Display.setDisplayMode(dm[i]);
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return dm[i];
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} catch (Exception e) {
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if (LWJGLUtil.DEBUG || DEBUG) {
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System.out.println("Failed to set display mode to "+dm[i]);
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e.printStackTrace();
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}
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}
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}
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throw new Exception("Failed to set display mode.");
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}
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}
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