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/**
* 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;
}
}
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