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/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (c) 2010 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:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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 Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package jogamp.opengl.macosx.cgl;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
import javax.media.nativewindow.NativeSurface;
import javax.media.opengl.GLContext;
import javax.media.opengl.GLDrawableFactory;
import javax.media.opengl.GLException;
import jogamp.opengl.GLDrawableImpl;
import jogamp.opengl.GLDynamicLookupHelper;
public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
// The Java2D/OpenGL pipeline on OS X uses low-level CGLContextObjs
// to represent the contexts for e.g. the Java2D back buffer. When
// the Java2D/JOGL bridge is active, this means that if we want to
// be able to share textures and display lists with the Java2D
// contexts, we need to use the CGL APIs rather than the NSOpenGL
// APIs on the JOGL side. For example, if we create a pbuffer using
// the NSOpenGL APIs and want to share textures and display lists
// between it and the Java2D back buffer, there is no way to do so,
// because the Java2D context is actually a CGLContextObj and the
// NSOpenGLContext's initWithFormat:shareContext: only accepts an
// NSOpenGLContext as its second argument. Of course there is no way
// to wrap an NSOpenGLContext around an arbitrary CGLContextObj.
//
// The situation we care most about is allowing a GLPbuffer to share
// textures, etc. with a GLJPanel when the Java2D/JOGL bridge is
// active; several of the demos rely on this functionality. We aim
// to get there by allowing a GLPBuffer to switch its implementation
// between using an NSOpenGLPixelBuffer and a CGLPBufferObj. In
// order to track whether this has been done we need to have the
// notion of a "mode" of both the MacOSXCGLDrawable and the
// MacOSXGLContext. Initially the mode is "unspecified", meaning it
// leans toward the default (NSOpenGL). If sharing is requested
// between either a GLJPanel and a GLPbuffer or a GLCanvas and a
// GLPbuffer, the GLPbuffer will be switched into the appropriate
// mode: CGL mode for a GLJPanel and NSOpenGL mode for a GLCanvas.
// To avoid thrashing we support exactly one such switch during the
// lifetime of a given GLPbuffer. This is not a fully general
// solution (for example, you can't share textures among a
// GLPbuffer, a GLJPanel and a GLCanvas simultaneously) but should
// be enough to get things off the ground.
public enum GLBackendType {
/** Default OpenGL Backend */
NSOPENGL(0),
/** Alternative OpenGL Backend, only used for external context! */
CGL(1);
public final int id;
GLBackendType(final int id){
this.id = id;
}
}
/* pp */ List<WeakReference<MacOSXCGLContext>> createdContexts = new ArrayList<WeakReference<MacOSXCGLContext>>();
private boolean haveSetOpenGLMode = false;
private GLBackendType openGLMode = GLBackendType.NSOPENGL;
public MacOSXCGLDrawable(final GLDrawableFactory factory, final NativeSurface comp, final boolean realized) {
super(factory, comp, realized);
initOpenGLImpl(getOpenGLMode());
}
@Override
protected void setRealizedImpl() {
}
@Override
protected void associateContext(final GLContext ctx, final boolean bound) {
// NOTE: we need to keep track of the created contexts in order to
// implement swapBuffers() because of how Mac OS X implements its
// OpenGL window interface
synchronized (createdContexts) {
if(bound) {
final MacOSXCGLContext osxCtx = (MacOSXCGLContext)ctx;
createdContexts.add(new WeakReference<MacOSXCGLContext>(osxCtx));
} else {
for(int i=0; i<createdContexts.size(); ) {
final MacOSXCGLContext _ctx = createdContexts.get(i).get();
if( _ctx == null || _ctx == ctx) {
createdContexts.remove(i);
} else {
i++;
}
}
}
}
}
@Override
protected final void swapBuffersImpl(final boolean doubleBuffered) {
if(doubleBuffered) {
synchronized (createdContexts) {
for(int i=0; i<createdContexts.size(); ) {
final MacOSXCGLContext ctx = createdContexts.get(i).get();
if (ctx != null) {
ctx.swapBuffers();
i++;
} else {
createdContexts.remove(i);
}
}
}
}
}
@Override
public GLDynamicLookupHelper getGLDynamicLookupHelper() {
return getFactoryImpl().getGLDynamicLookupHelper(0);
}
// Support for "mode switching" as described in MacOSXCGLDrawable
public void setOpenGLMode(final GLBackendType mode) {
if (mode == openGLMode) {
return;
}
if (haveSetOpenGLMode) {
throw new GLException("Can't switch between using NSOpenGLPixelBuffer and CGLPBufferObj more than once");
}
setRealized(false);
if (DEBUG) {
System.err.println("MacOSXCGLDrawable: Switching context mode " + openGLMode + " -> " + mode);
}
initOpenGLImpl(mode);
openGLMode = mode;
haveSetOpenGLMode = true;
}
public final GLBackendType getOpenGLMode() { return openGLMode; }
protected void initOpenGLImpl(final GLBackendType backend) { /* nop */ }
}
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