1 files changed, 107 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java b/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java
new file mode 100644
index 000000000..207a8e674
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java
@@ -0,0 +1,107 @@
+/**
+ * Copyright 2012 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ * 
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ * 
+ *    2. 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.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``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 JogAmp Community 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.
+ * 
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package jogamp.opengl.egl;
+
+import java.nio.IntBuffer;
+
+import jogamp.opengl.Debug;
+
+import com.jogamp.common.util.LongIntHashMap;
+
+/** 
+ * This implementation provides recursive calls to  
+ * {@link EGL#eglInitialize(long, IntBuffer, IntBuffer)} and {@link EGL#eglTerminate(long)},
+ * where <code>eglInitialize(..)</code> is issued only for the 1st call per <code>eglDisplay</code>
+ * and <code>eglTerminate(..)</code> is issued only for the last call.
+ * <p>
+ * This class is required, due to implementation bugs within EGL where {@link EGL#eglTerminate(long)}
+ * does not mark the resource for deletion when still in use, bug releases them immediatly.
+ * </p>
+ */
+public class EGLDisplayUtil {
+    protected static final boolean DEBUG = Debug.debug("EGL");
+    
+    static LongIntHashMap eglDisplayCounter;
+    
+    static {
+        eglDisplayCounter = new LongIntHashMap();
+        eglDisplayCounter.setKeyNotFoundValue(0);
+    }
+
+    public static long eglGetDisplay(long nativeDisplay_id)  {
+        return EGL.eglGetDisplay(nativeDisplay_id);
+    }
+    
+    public static synchronized boolean eglInitialize(long eglDisplay, int[] major, int major_offset, int[] minor, int minor_offset)  {
+        final boolean res;    
+        final int refCnt = eglDisplayCounter.get(eglDisplay) + 1; // 0 + 1 = 1 -> 1st init
+        if(1==refCnt) {
+            res = EGL.eglInitialize(eglDisplay, major, major_offset, minor, minor_offset);
+        } else {
+            res = true;
+        }
+        eglDisplayCounter.put(eglDisplay, refCnt);
+        if(DEBUG) {
+            System.err.println("EGL.eglInitialize(0x"+Long.toHexString(eglDisplay)+" ...): #"+refCnt+" = "+res);
+        }
+        return res;
+    }
+    
+    public static synchronized boolean eglInitialize(long eglDisplay, IntBuffer major, IntBuffer minor)  {    
+        final boolean res;    
+        final int refCnt = eglDisplayCounter.get(eglDisplay) + 1; // 0 + 1 = 1 -> 1st init
+        if(1==refCnt) { // only initialize once
+            res = EGL.eglInitialize(eglDisplay, major, minor);
+        } else {
+            res = true;
+        }
+        eglDisplayCounter.put(eglDisplay, refCnt);
+        if(DEBUG) {
+            System.err.println("EGL.eglInitialize(0x"+Long.toHexString(eglDisplay)+" ...): #"+refCnt+" = "+res);
+        }
+        return res;
+    }
+    
+    public static synchronized boolean eglTerminate(long eglDisplay)  {
+        final boolean res;    
+        final int refCnt = eglDisplayCounter.get(eglDisplay) - 1; // 1 - 1 = 0 -> final terminate
+        if(0==refCnt) { // no terminate if still in use or already terminated
+            res = EGL.eglTerminate(eglDisplay);
+        } else {
+            res = true;
+        }
+        if(0<=refCnt) { // no negative refCount
+            eglDisplayCounter.put(eglDisplay, refCnt);
+        }
+        if(DEBUG) {
+            System.err.println("EGL.eglTerminate(0x"+Long.toHexString(eglDisplay)+" ...): #"+refCnt+" = "+res);
+        }
+        return res;
+    }
+}