Java tutorial
package org.jge.util; import java.awt.Color; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileOutputStream; import java.nio.IntBuffer; import org.jge.JGEngine; import org.jge.crash.CrashReport; import org.lwjgl.BufferUtils; import org.lwjgl.opengl.Display; import org.lwjgl.opengl.GL11; /** * The MIT License (MIT) * * Copyright (c) 2014 jglrxavpok * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * @author jglrxavpok */ public class LWJGLHandler { private static boolean loaded; /** * @throws Exception */ public static void load(File folder) throws Exception { if (!loaded) { if (!folder.exists()) folder.mkdirs(); if (folder.isDirectory()) { installNatives(folder); System.setProperty("org.lwjgl.librarypath", folder.getAbsolutePath()); } loaded = true; } } private static void installNatives(File folder) throws Exception { OperatingSystem os = SystemUtils.getOS(); Log.message("OS found : " + System.getProperty("os.name") + " " + System.getProperty("os.version")); Log.message("Installing natives..."); if (os == OperatingSystem.WINDOWS) { if (!new File(folder.getPath() + "/jinput-dx8_64.dll").exists()) { extractFromClasspath("/windows/jinput-dx8_64.dll", folder); extractFromClasspath("/windows/jinput-dx8.dll", folder); extractFromClasspath("/windows/jinput-raw_64.dll", folder); extractFromClasspath("/windows/jinput-raw.dll", folder); extractFromClasspath("/windows/lwjgl.dll", folder); extractFromClasspath("/windows/lwjgl64.dll", folder); extractFromClasspath("/windows/OpenAL32.dll", folder); extractFromClasspath("/windows/OpenAL64.dll", folder); } else { Log.message("Natives already exist."); } } else if (os == OperatingSystem.SOLARIS) { if (!new File(folder.getPath() + "/liblwjgl.so").exists()) { extractFromClasspath("/solaris/liblwjgl.so", folder); extractFromClasspath("/solaris/liblwjgl64.so", folder); extractFromClasspath("/solaris/libopenal.so", folder); extractFromClasspath("/solaris/libopenal64.so", folder); } else { Log.message("Natives already exist."); } } else if (os == OperatingSystem.LINUX) { if (!new File(folder.getPath() + "/liblwjgl.so").exists()) { extractFromClasspath("/linux/liblwjgl.so", folder); extractFromClasspath("/linux/liblwjgl64.so", folder); extractFromClasspath("/linux/libopenal.so", folder); extractFromClasspath("/linux/libopenal64.so", folder); } else { Log.message("Natives already exist."); } } else if (os == OperatingSystem.MACOSX) { if (!new File(folder.getPath() + "/openal.dylib").exists()) { extractFromClasspath("/macosx/liblwjgl.jnilib", folder); extractFromClasspath("/macosx/liblwjgl-osx.jnilib", folder); extractFromClasspath("/macosx/openal.dylib", folder); } else { Log.message("Natives already exist."); } } else { JGEngine.crash(new CrashReport("Unknown OS: " + System.getProperty("os.name"))); } System.setProperty("net.java.games.input.librarypath", folder.getAbsolutePath()); } private static void extractFromClasspath(String fileName, File folder) { String[] split = fileName.split("/"); String diskFileName = split[split.length - 1]; try (FileOutputStream in = new FileOutputStream(new File(folder, diskFileName))) { IO.copy(LWJGLHandler.class.getResourceAsStream(fileName), in); } catch (Exception e) { e.printStackTrace(); } } private static int[] screenshotBufferArray; private static IntBuffer screenshotBuffer; public static BufferedImage takeScreenshot() { int k = Display.getWidth() * Display.getHeight(); if (screenshotBuffer == null || screenshotBuffer.capacity() < k) { screenshotBuffer = BufferUtils.createIntBuffer(k); screenshotBufferArray = new int[k]; } GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1); GL11.glPixelStorei(GL11.GL_UNPACK_ALIGNMENT, 1); screenshotBuffer.clear(); GL11.glReadPixels(0, 0, Display.getWidth(), Display.getHeight(), GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, screenshotBuffer); screenshotBuffer.get(screenshotBufferArray); int[] aint1 = new int[Display.getWidth()]; int j = Display.getHeight() / 2; for (int l = 0; l < j; ++l) { System.arraycopy(screenshotBufferArray, l * Display.getWidth(), aint1, 0, Display.getWidth()); System.arraycopy(screenshotBufferArray, (Display.getHeight() - 1 - l) * Display.getWidth(), screenshotBufferArray, l * Display.getWidth(), Display.getWidth()); System.arraycopy(aint1, 0, screenshotBufferArray, (Display.getHeight() - 1 - l) * Display.getWidth(), Display.getWidth()); } BufferedImage bufferedimage = new BufferedImage(Display.getWidth(), Display.getHeight(), BufferedImage.TYPE_INT_RGB); for (int i = 0; i < screenshotBufferArray.length; i++) { Color c = ImageUtils.getColor(screenshotBufferArray[i]); screenshotBufferArray[i] = new Color(c.getBlue(), c.getGreen(), c.getRed()).getRGB(); } bufferedimage.setRGB(0, 0, Display.getWidth(), Display.getHeight(), screenshotBufferArray, 0, Display.getWidth()); return bufferedimage; } }