/lib/LWJGL-2.6/java/org/lwjgl/LWJGLUtil.java
Java | 578 lines | 389 code | 40 blank | 149 comment | 34 complexity | 8b1dfea8fe465abf10c39ddc61d90223 MD5 | raw file
- /*
- * Copyright (c) 2002-2008 LWJGL Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * * Neither the name of 'LWJGL' nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- package org.lwjgl;
- import java.io.File;
- import java.lang.reflect.Field;
- import java.lang.reflect.Method;
- import java.lang.reflect.Modifier;
- import java.nio.ByteBuffer;
- import java.security.AccessController;
- import java.security.PrivilegedAction;
- import java.security.PrivilegedActionException;
- import java.security.PrivilegedExceptionAction;
- import java.util.*;
- /**
- * <p>
- * Internal library methods
- * </p>
- *
- * @author Brian Matzon <brian@matzon.dk>
- * @version $Revision: 3419 $
- * $Id: LWJGLUtil.java 3419 2010-09-30 17:21:50Z spasi $
- */
- public class LWJGLUtil {
- public static final int PLATFORM_LINUX = 1;
- public static final int PLATFORM_MACOSX = 2;
- public static final int PLATFORM_WINDOWS = 3;
- public static final String PLATFORM_LINUX_NAME = "linux";
- public static final String PLATFORM_MACOSX_NAME = "macosx";
- public static final String PLATFORM_WINDOWS_NAME = "windows";
- /** LWJGL Logo - 16 by 16 pixels */
- public static final ByteBuffer LWJGLIcon16x16 = BufferUtils.createByteBuffer(16 * 16 * 4).put(new byte[] {
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- 58, 125, -75, -1, 72, -122, -70, -1, -38, -25, -15, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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- 0, -1, 12, 12, 12, -1, -10, -10, -10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -30, -20, -12,
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- -1, -1, -2, -2, -2, -1, -68, -68, -68, -1, 79, 79, 79, -1, 3, 3, 3, -1, 74, 74, 74, -1, -1, -1, -1, -1, -1,
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- -1, -1, -33, -33, -33, -1, -26, -26, -26, -1, -1, -1, -1, -1
- });
- /** LWJGL Logo - 32 by 32 pixels */
- public static final ByteBuffer LWJGLIcon32x32 = BufferUtils.createByteBuffer(32 * 32 * 4).put(new byte[] {
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- 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1,
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- -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75,
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- 95, -1, 0, 0, 0, -1, 0, 0, 0, -1, 11, 11, 11, -1, 55, 55, 55, -1, 118, 118, 118, -1, -73, -73, -73, -1,
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- -1, -1, -1, -1, 86, 86, 86, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0,
- -1, 15, 15, 15, -1, -7, -7, -7, -1, -47, -47, -47, -1, 3, 3, 3, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1,
- 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, -114, -114, -114, -1, -1, -1, -1, -1, -7,
- -7, -7, -1, -124, -124, -124, -1, 112, 112, 112, -1, -80, -80, -80, -1, -22, -22, -22, -1, -1, -1, -1, -1,
- -7, -5, -4, -1, -36, -24, -14, -1, -10, -7, -4, -1, -1, -1, -1, -1, -1, -1, -1, -1, 21, 21, 21, -1, 0, 0,
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- 0, -1, 0, 0, 0, -1, 4, 4, 4, -1, 47, 47, 47, -1, 112, 112, 112, -1, -80, -80, -80, -1, -26, -26, -26, -1,
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- -1, 0, 0, 0, -1, 9, 9, 9, -1, 50, 50, 50, -1, -79, -79, -79, -1, -10, -10, -10, -1, -95, -95, -95, -1, 53,
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- -1, -1, -1, -1, -1, -1, -1, -4, -4, -4, -1, -66, -66, -66, -1, 80, 80, 80, -1, 5, 5, 5, -1, 37, 37, 37, -1,
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- 1, 1, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0,
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- -113, -75, -43, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75,
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- 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 58, 125, -75, -1, 77, -119, -68, -1, -65, -44, -25,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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- -1, -9, -6, -4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1
- });
- /** Debug flag. */
- public static final boolean DEBUG = getPrivilegedBoolean("org.lwjgl.util.Debug");
- public static final boolean CHECKS = !getPrivilegedBoolean("org.lwjgl.util.NoChecks");
- private static final int PLATFORM;
- static {
- LWJGLIcon16x16.flip();
- LWJGLIcon32x32.flip();
- final String osName = getPrivilegedProperty("os.name");
- if ( osName.startsWith("Windows") )
- PLATFORM = PLATFORM_WINDOWS;
- else if ( osName.startsWith("Linux") || osName.startsWith("FreeBSD") || osName.startsWith("SunOS") )
- PLATFORM = PLATFORM_LINUX;
- else if ( osName.startsWith("Mac OS X") )
- PLATFORM = PLATFORM_MACOSX;
- else
- throw new LinkageError("Unknown platform: " + osName);
- }
- /**
- * @see #PLATFORM_WINDOWS
- * @see #PLATFORM_LINUX
- * @see #PLATFORM_MACOSX
- * @return the current platform type
- */
- public static int getPlatform() {
- return PLATFORM;
- }
- /**
- * @see #PLATFORM_WINDOWS_NAME
- * @see #PLATFORM_LINUX_NAME
- * @see #PLATFORM_MACOSX_NAME
- * @return current platform name
- */
- public static String getPlatformName() {
- switch (LWJGLUtil.getPlatform()) {
- case LWJGLUtil.PLATFORM_LINUX:
- return PLATFORM_LINUX_NAME;
- case LWJGLUtil.PLATFORM_MACOSX:
- return PLATFORM_MACOSX_NAME;
- case LWJGLUtil.PLATFORM_WINDOWS:
- return PLATFORM_WINDOWS_NAME;
- default:
- return "unknown";
- }
- }
- /**
- * Locates the paths required by a library.
- *
- * @param libname Local Library Name to search the classloader with ("openal").
- * @param platform_lib_name The native library name ("libopenal.so")
- * @param classloader The classloader to ask for library paths
- * @return Paths to located libraries, if any
- */
- public static String[] getLibraryPaths(String libname, String platform_lib_name, ClassLoader classloader) {
- return getLibraryPaths(libname, new String[]{platform_lib_name}, classloader);
- }
- /**
- * Locates the paths required by a library.
- *
- * @param libname Local Library Name to search the classloader with ("openal").
- * @param platform_lib_names The list of possible library names ("libopenal.so")
- * @param classloader The classloader to ask for library paths
- * @return Paths to located libraries, if any
- */
- public static String[] getLibraryPaths(String libname, String[] platform_lib_names, ClassLoader classloader) {
- // need to pass path of possible locations of library to native side
- List<String> possible_paths = new ArrayList<String>();
- String classloader_path = getPathFromClassLoader(libname, classloader);
- if (classloader_path != null) {
- log("getPathFromClassLoader: Path found: " + classloader_path);
- possible_paths.add(classloader_path);
- }
- for ( String platform_lib_name : platform_lib_names ) {
- String lwjgl_classloader_path = getPathFromClassLoader("lwjgl", classloader);
- if ( lwjgl_classloader_path != null ) {
- log("getPathFromClassLoader: Path found: " + lwjgl_classloader_path);
- possible_paths.add(lwjgl_classloader_path.substring(0, lwjgl_classloader_path.lastIndexOf(File.separator))
- + File.separator + platform_lib_name);
- }
- // add Installer path
- String alternative_path = getPrivilegedProperty("org.lwjgl.librarypath");
- if ( alternative_path != null ) {
- possible_paths.add(alternative_path + File.separator + platform_lib_name);
- }
- // Add all possible paths from java.library.path
- String java_library_path = getPrivilegedProperty("java.library.path");
- StringTokenizer st = new StringTokenizer(java_library_path, File.pathSeparator);
- while ( st.hasMoreTokens() ) {
- String path = st.nextToken();
- possible_paths.add(path + File.separator + platform_lib_name);
- }
- //add current path
- String current_dir = getPrivilegedProperty("user.dir");
- possible_paths.add(current_dir + File.separator + platform_lib_name);
- //add pure library (no path, let OS search)
- possible_paths.add(platform_lib_name);
- }
- //create needed string array
- return possible_paths.toArray(new String[possible_paths.size()]);
- }
- static void execPrivileged(final String[] cmd_array) throws Exception {
- try {
- Process process = AccessController.doPrivileged(new PrivilegedExceptionAction<Process>() {
- public Process run() throws Exception {
- return Runtime.getRuntime().exec(cmd_array);
- }
- });
- // Close unused streams to make sure the child process won't hang
- process.getInputStream().close();
- process.getOutputStream().close();
- process.getErrorStream().close();
- } catch (PrivilegedActionException e) {
- throw (Exception)e.getCause();
- }
- }
- private static String getPrivilegedProperty(final String property_name) {
- return AccessController.doPrivileged(new PrivilegedAction<String>() {
- public String run() {
- return System.getProperty(property_name);
- }
- });
- }
- /**
- * Tries to locate named library from the current ClassLoader
- * This method exists because native libraries are loaded from native code, and as such
- * is exempt from ClassLoader library loading rutines. It therefore always fails.
- * We therefore invoke the protected method of the ClassLoader to see if it can
- * locate it.
- *
- * @param libname Name of library to search for
- * @param classloader Classloader to use
- * @return Absolute path to library if found, otherwise null
- */
- private static String getPathFromClassLoader(final String libname, final ClassLoader classloader) {
- try {
- log("getPathFromClassLoader: searching for: " + libname);
- Class<?> c = classloader.getClass();
- while (c != null) {
- final Class<?> clazz = c;
- try {
- return AccessController.doPrivileged(new PrivilegedExceptionAction<String>() {
- public String run() throws Exception {
- Method findLibrary = clazz.getDeclaredMethod("findLibrary", String.class);
- findLibrary.setAccessible(true);
- String path = (String)findLibrary.invoke(classloader, libname);
- return path;
- }
- });
- } catch (PrivilegedActionException e) {
- log("Failed to locate findLibrary method: " + e.getCause());
- c = c.getSuperclass();
- }
- }
- } catch (Exception e) {
- log("Failure locating " + e + " using classloader:" + e);
- }
- return null;
- }
- /**
- * Gets a boolean property as a privileged action.
- */
- private static boolean getPrivilegedBoolean(final String property_name) {
- Boolean value = AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
- public Boolean run() {
- return Boolean.getBoolean(property_name);
- }
- });
- return value;
- }
- /**
- * Prints the given message to System.err if DEBUG is true.
- *
- * @param msg Message to print
- */
- public static void log(String msg) {
- if (DEBUG) {
- System.err.println(msg);
- }
- }
- /**
- * Method to determine if the current system is running a version of
- * Mac OS X better than the given version. This is only useful for Mac OS X
- * specific code and will not work for any other platform.
- */
- public static boolean isMacOSXEqualsOrBetterThan(int major_required, int minor_required) {
- String os_version = getPrivilegedProperty("os.version");
- StringTokenizer version_tokenizer = new StringTokenizer(os_version, ".");
- int major;
- int minor;
- try {
- String major_str = version_tokenizer.nextToken();
- String minor_str = version_tokenizer.nextToken();
- major = Integer.parseInt(major_str);
- minor = Integer.parseInt(minor_str);
- } catch (Exception e) {
- LWJGLUtil.log("Exception occurred while trying to determine OS version: " + e);
- // Best guess, no
- return false;
- }
- return major > major_required || (major == major_required && minor >= minor_required);
- }
- /**
- * Returns a map of public static final integer fields in the specified classes, to their String representations.
- * An optional filter can be specified to only include specific fields. The target map may be null, in which
- * case a new map is allocated and returned.
- * <p>
- * This method is useful when debugging to quickly identify values returned from the AL/GL/CL APIs.
- *
- * @param filter the filter to use (optional)
- * @param target the target map (optional)
- * @param tokenClasses an array of classes to get tokens from
- *
- * @return the token map
- */
- public static Map<Integer, String> getClassTokens(final TokenFilter filter, final Map<Integer, String> target, final Class ... tokenClasses) {
- return getClassTokens(filter, target, Arrays.asList(tokenClasses));
- }
- /**
- * Returns a map of public static final integer fields in the specified classes, to their String representations.
- * An optional filter can be specified to only include specific fields. The target map may be null, in which
- * case a new map is allocated and returned.
- * <p>
- * This method is useful when debugging to quickly identify values returned from the AL/GL/CL APIs.
- *
- * @param filter the filter to use (optional)
- * @param target the target map (optional)
- * @param tokenClasses the classes to get tokens from
- *
- * @return the token map
- */
- public static Map<Integer, String> getClassTokens(final TokenFilter filter, Map<Integer, String> target, final Iterable<Class> tokenClasses) {
- if ( target == null )
- target = new HashMap<Integer, String>();
- final int TOKEN_MODIFIERS = Modifier.PUBLIC | Modifier.STATIC | Modifier.FINAL;
- for ( final Class tokenClass : tokenClasses ) {
- for ( final Field field : tokenClass.getDeclaredFields() ) {
- // Get only <public static final int> fields.
- if ( (field.getModifiers() & TOKEN_MODIFIERS) == TOKEN_MODIFIERS && field.getType() == int.class ) {
- try {
- final int value = field.getInt(null);
- if ( filter != null && !filter.accept(field, value) )
- continue;
- if ( target.containsKey(value) ) // Print colliding tokens in their hex representation.
- target.put(value, toHexString(value));
- else
- target.put(value, field.getName());
- } catch (IllegalAccessException e) {
- // Ignore
- }
- }
- }
- }
- return target;
- }
- /**
- * Returns a string representation of the integer argument as an
- * unsigned integer in base 16. The string will be uppercase
- * and will have a leading '0x'.
- *
- * @param value the integer value
- *
- * @return the hex string representation
- */
- public static String toHexString(final int value) {
- return "0x" + Integer.toHexString(value).toUpperCase();
- }
- /** Simple interface for Field filtering. */
- public interface TokenFilter {
- /**
- * Should return true if the specified Field passes the filter.
- *
- * @param field the Field to test
- * @param value the integer value of the field
- *
- * @result true if the Field is accepted
- */
- boolean accept(Field field, int value);
- }
- }