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| 1 | /* | ||
| 2 | * Copyright (c) 2005, 2007, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.java2d.opengl; | ||
| 27 | |||
| 28 | import sun.java2d.pipe.RenderBuffer; | ||
| 29 | import sun.java2d.pipe.RenderQueue; | ||
| 30 | import static sun.java2d.pipe.BufferedOpCodes.*; | ||
| 31 | |||
| 32 | /** | ||
| 33 | * OGL-specific implementation of RenderQueue. This class provides a | ||
| 34 | * single (daemon) thread that is responsible for periodically flushing | ||
| 35 | * the queue, thus ensuring that only one thread communicates with the native | ||
| 36 | * OpenGL libraries for the entire process. | ||
| 37 | */ | ||
| 38 | public class OGLRenderQueue extends RenderQueue { | ||
| 39 | |||
| 40 | private static OGLRenderQueue theInstance; | ||
| 41 | private final QueueFlusher flusher; | ||
| 42 | |||
| 43 | private OGLRenderQueue() { | ||
| 44 | flusher = new QueueFlusher(); | ||
| 45 | } | ||
| 46 | |||
| 47 | /** | ||
| 48 | * Returns the single OGLRenderQueue instance. If it has not yet been | ||
| 49 | * initialized, this method will first construct the single instance | ||
| 50 | * before returning it. | ||
| 51 | */ | ||
| 52 | public static synchronized OGLRenderQueue getInstance() { | ||
| 53 | if (theInstance == null) { | ||
| 54 | theInstance = new OGLRenderQueue(); | ||
| 55 | } | ||
| 56 | return theInstance; | ||
| 57 | } | ||
| 58 | |||
| 59 | /** | ||
| 60 | * Flushes the single OGLRenderQueue instance synchronously. If an | ||
| 61 | * OGLRenderQueue has not yet been instantiated, this method is a no-op. | ||
| 62 | * This method is useful in the case of Toolkit.sync(), in which we want | ||
| 63 | * to flush the OGL pipeline, but only if the OGL pipeline is currently | ||
| 64 | * enabled. Since this class has few external dependencies, callers need | ||
| 65 | * not be concerned that calling this method will trigger initialization | ||
| 66 | * of the OGL pipeline and related classes. | ||
| 67 | */ | ||
| 68 | public static void sync() { | ||
| 69 | if (theInstance != null) { | ||
| 70 | theInstance.lock(); | ||
| 71 | try { | ||
| 72 | theInstance.ensureCapacity(4); | ||
| 73 | theInstance.getBuffer().putInt(SYNC); | ||
| 74 | theInstance.flushNow(); | ||
| 75 | } finally { | ||
| 76 | theInstance.unlock(); | ||
| 77 | } | ||
| 78 | } | ||
| 79 | } | ||
| 80 | |||
| 81 | /** | ||
| 82 | * Disposes the native memory associated with the given native | ||
| 83 | * graphics config info pointer on the single queue flushing thread. | ||
| 84 | */ | ||
| 85 | public static void disposeGraphicsConfig(long pConfigInfo) { | ||
| 86 | OGLRenderQueue rq = getInstance(); | ||
| 87 | rq.lock(); | ||
| 88 | try { | ||
| 89 | // make sure we make the context associated with the given | ||
| 90 | // GraphicsConfig current before disposing the native resources | ||
| 91 | OGLContext.setScratchSurface(pConfigInfo); | ||
| 92 | |||
| 93 | RenderBuffer buf = rq.getBuffer(); | ||
| 94 | rq.ensureCapacityAndAlignment(12, 4); | ||
| 95 | buf.putInt(DISPOSE_CONFIG); | ||
| 96 | buf.putLong(pConfigInfo); | ||
| 97 | |||
| 98 | // this call is expected to complete synchronously, so flush now | ||
| 99 | rq.flushNow(); | ||
| 100 | } finally { | ||
| 101 | rq.unlock(); | ||
| 102 | } | ||
| 103 | } | ||
| 104 | |||
| 105 | /** | ||
| 106 | * Returns true if the current thread is the OGL QueueFlusher thread. | ||
| 107 | */ | ||
| 108 | public static boolean isQueueFlusherThread() { | ||
| 109 | return (Thread.currentThread() == getInstance().flusher); | ||
| 110 | } | ||
| 111 | |||
| 112 | public void flushNow() { | ||
| 113 | // assert lock.isHeldByCurrentThread(); | ||
| 114 | try { | ||
| 115 | flusher.flushNow(); | ||
| 116 | } catch (Exception e) { | ||
| 117 | System.err.println("exception in flushNow:"); | ||
| 118 | e.printStackTrace(); | ||
| 119 | } | ||
| 120 | } | ||
| 121 | |||
| 122 | public void flushAndInvokeNow(Runnable r) { | ||
| 123 | // assert lock.isHeldByCurrentThread(); | ||
| 124 | try { | ||
| 125 | flusher.flushAndInvokeNow(r); | ||
| 126 | } catch (Exception e) { | ||
| 127 | System.err.println("exception in flushAndInvokeNow:"); | ||
| 128 | e.printStackTrace(); | ||
| 129 | } | ||
| 130 | } | ||
| 131 | |||
| 132 | private native void flushBuffer(long buf, int limit); | ||
| 133 | |||
| 134 | private void flushBuffer() { | ||
| 135 | // assert lock.isHeldByCurrentThread(); | ||
| 136 | int limit = buf.position(); | ||
| 137 | if (limit > 0) { | ||
| 138 | // process the queue | ||
| 139 | flushBuffer(buf.getAddress(), limit); | ||
| 140 | } | ||
| 141 | // reset the buffer position | ||
| 142 | buf.clear(); | ||
| 143 | // clear the set of references, since we no longer need them | ||
| 144 | refSet.clear(); | ||
| 145 | } | ||
| 146 | |||
| 147 | private class QueueFlusher extends Thread { | ||
| 148 | private boolean needsFlush; | ||
| 149 | private Runnable task; | ||
| 150 | private Error error; | ||
| 151 | |||
| 152 | public QueueFlusher() { | ||
| 153 | super("Java2D Queue Flusher"); | ||
| 154 | setDaemon(true); | ||
| 155 | setPriority(Thread.MAX_PRIORITY); | ||
| 156 | start(); | ||
| 157 | } | ||
| 158 | |||
| 159 | public synchronized void flushNow() { | ||
| 160 | // wake up the flusher | ||
| 161 | needsFlush = true; | ||
| 162 | notify(); | ||
| 163 | |||
| 164 | // wait for flush to complete | ||
| 165 | while (needsFlush) { | ||
| 166 | try { | ||
| 167 | wait(); | ||
| 168 | } catch (InterruptedException e) { | ||
| 169 | } | ||
| 170 | } | ||
| 171 | |||
| 172 | // re-throw any error that may have occurred during the flush | ||
| 173 | if (error != null) { | ||
| 174 | throw error; | ||
| 175 | } | ||
| 176 | } | ||
| 177 | |||
| 178 | public synchronized void flushAndInvokeNow(Runnable task) { | ||
| 179 | this.task = task; | ||
| 180 | flushNow(); | ||
| 181 | } | ||
| 182 | |||
| 183 | public synchronized void run() { | ||
| 184 | boolean timedOut = false; | ||
| 185 | while (true) { | ||
| 186 | while (!needsFlush) { | ||
| 187 | try { | ||
| 188 | timedOut = false; | ||
| 189 | /* | ||
| 190 | * Wait until we're woken up with a flushNow() call, | ||
| 191 | * or the timeout period elapses (so that we can | ||
| 192 | * flush the queue periodically). | ||
| 193 | */ | ||
| 194 | wait(100); | ||
| 195 | /* | ||
| 196 | * We will automatically flush the queue if the | ||
| 197 | * following conditions apply: | ||
| 198 | * - the wait() timed out | ||
| 199 | * - we can lock the queue (without blocking) | ||
| 200 | * - there is something in the queue to flush | ||
| 201 | * Otherwise, just continue (we'll flush eventually). | ||
| 202 | */ | ||
| 203 | if (!needsFlush && (timedOut = tryLock())) { | ||
| 204 | if (buf.position() > 0) { | ||
| 205 | needsFlush = true; | ||
| 206 | } else { | ||
| 207 | unlock(); | ||
| 208 | } | ||
| 209 | } | ||
| 210 | } catch (InterruptedException e) { | ||
| 211 | } | ||
| 212 | } | ||
| 213 | try { | ||
| 214 | // reset the throwable state | ||
| 215 | error = null; | ||
| 216 | // flush the buffer now | ||
| 217 | flushBuffer(); | ||
| 218 | // if there's a task, invoke that now as well | ||
| 219 | if (task != null) { | ||
| 220 | task.run(); | ||
| 221 | } | ||
| 222 | } catch (Error e) { | ||
| 223 | error = e; | ||
| 224 | } catch (Exception x) { | ||
| 225 | System.err.println("exception in QueueFlusher:"); | ||
| 226 | x.printStackTrace(); | ||
| 227 | } finally { | ||
| 228 | if (timedOut) { | ||
| 229 | unlock(); | ||
| 230 | } | ||
| 231 | task = null; | ||
| 232 | // allow the waiting thread to continue | ||
| 233 | needsFlush = false; | ||
| 234 | notify(); | ||
| 235 | } | ||
| 236 | } | ||
| 237 | } | ||
| 238 | } | ||
| 239 | } | ||