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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 com.jogamp.opengl;
import javax.media.nativewindow.AbstractGraphicsDevice;
import javax.media.opengl.GLAutoDrawableDelegate;
import javax.media.opengl.GLContext;
import javax.media.opengl.GLDrawable;
import javax.media.opengl.GLException;
import jogamp.opengl.GLFBODrawableImpl;
/**
* Platform-independent class exposing FBO offscreen functionality to
* applications.
* <p>
* This class distinguishes itself from {@link GLAutoDrawableDelegate}
* with it's {@link #setSize(int, int)} functionality.
* </p>
*/
public class OffscreenAutoDrawable extends GLAutoDrawableDelegate {
/**
* @param drawable a valid {@link GLDrawable}, may not be realized yet.
* @param context a valid {@link GLContext}, may not be made current (created) yet.
* @param ownDevice pass <code>true</code> if {@link AbstractGraphicsDevice#close()} shall be issued,
* otherwise pass <code>false</code>. Closing the device is required in case
* the drawable is created w/ it's own new instance, e.g. offscreen drawables,
* and no further lifecycle handling is applied.
*/
public OffscreenAutoDrawable(GLDrawable drawable, GLContext context, boolean ownDevice) {
super(drawable, context, null, ownDevice);
}
/**
* Attempts to resize this offscreen auto drawable, if supported
* by the underlying {@link GLDrawable).
* @param newWidth
* @param newHeight
* @return <code>true</code> if resize was executed, otherwise <code>false</code>.
* @throws GLException in case of an error during the resize operation
*/
public boolean setSize(int newWidth, int newHeight) throws GLException {
boolean done = false;
if(drawable instanceof GLFBODrawableImpl) {
Throwable tFBO = null;
Throwable tGL = null;
context.makeCurrent();
try {
((GLFBODrawableImpl)drawable).setSize(context.getGL(), newWidth, newHeight);
done = true;
} catch (Throwable t) {
tFBO = t;
} finally {
try {
context.release();
} catch (Throwable t) {
tGL = t;
}
}
if(null != tFBO) {
throw new GLException("OffscreenAutoDrawable.setSize(..) GLFBODrawableImpl.setSize(..) exception", tFBO);
}
if(null != tGL) {
throw new GLException("OffscreenAutoDrawable.setSize(..) GLContext.release() exception", tGL);
}
}
if(done) {
this.defaultWindowResizedOp();
return true;
}
return false;
}
/**
* If the underlying {@link GLDrawable} is an FBO implementation
* and contains an {#link FBObject}, the same is returned.
* Otherwise returns <code>null</code>.
*/
public FBObject getFBObject() {
if(drawable instanceof GLFBODrawableImpl) {
return ((GLFBODrawableImpl)drawable).getFBObject();
}
return null;
}
}
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