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/*
* Copyright (c) 2003 Sun Microsystems, Inc. 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 com.sun.opengl.impl.macosx;
import java.awt.Component;
import java.lang.ref.WeakReference;
import java.security.*;
import java.util.*;
import javax.media.opengl.*;
import com.sun.opengl.impl.*;
public class MacOSXOnscreenGLDrawable extends MacOSXGLDrawable {
public static final int LOCK_SURFACE_NOT_READY = 1;
public static final int LOCK_SURFACE_CHANGED = 2;
public static final int LOCK_SUCCESS = 3;
private static JAWT jawt;
protected Component component;
private List/*<WeakReference<GLContext>>*/ createdContexts =
new ArrayList();
// Variables for lockSurface/unlockSurface
private JAWT_DrawingSurface ds;
private JAWT_DrawingSurfaceInfo dsi;
private JAWT_MacOSXDrawingSurfaceInfo macosxdsi;
// Indicates whether the component (if an onscreen context) has been
// realized. Plausibly, before the component is realized the JAWT
// should return an error or NULL object from some of its
// operations; this appears to be the case on Win32 but is not true
// at least with Sun's current X11 implementation (1.4.x), which
// crashes with no other error reported if the DrawingSurfaceInfo is
// fetched from a locked DrawingSurface during the validation as a
// result of calling show() on the main thread. To work around this
// we prevent any JAWT or OpenGL operations from being done until
// addNotify() is called on the component.
protected boolean realized;
// Workaround for instance of 4796548
private boolean firstLock = true;
public MacOSXOnscreenGLDrawable(Component component,
GLCapabilities capabilities,
GLCapabilitiesChooser chooser) {
super(capabilities, chooser);
this.component = component;
}
public GLContext createContext(GLContext shareWith) {
MacOSXOnscreenGLContext context =
new MacOSXOnscreenGLContext(this, shareWith);
// 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 (this) {
List newContexts = new ArrayList();
newContexts.addAll(createdContexts);
newContexts.add(new WeakReference(context));
createdContexts = newContexts;
}
return context;
}
public void setRealized(boolean realized) {
this.realized = realized;
}
public void setSize(int width, int height) {
component.setSize(width, height);
}
public int getWidth() {
return component.getWidth();
}
public int getHeight() {
return component.getHeight();
}
public void swapBuffers() throws GLException {
for (Iterator iter = createdContexts.iterator(); iter.hasNext(); ) {
WeakReference ref = (WeakReference) iter.next();
MacOSXOnscreenGLContext ctx = (MacOSXOnscreenGLContext) ref.get();
// FIXME: clear out unreachable contexts
if (ctx != null) {
ctx.swapBuffers();
}
}
}
public int lockSurface() throws GLException {
if (!realized) {
return LOCK_SURFACE_NOT_READY;
}
if (nsView != 0) {
throw new GLException("Surface already locked");
}
ds = getJAWT().GetDrawingSurface(component);
if (ds == null) {
// Widget not yet realized
return LOCK_SURFACE_NOT_READY;
}
int res = ds.Lock();
if ((res & JAWTFactory.JAWT_LOCK_ERROR) != 0) {
throw new GLException("Unable to lock surface");
}
// See whether the surface changed and if so destroy the old
// OpenGL context so it will be recreated (NOTE: removeNotify
// should handle this case, but it may be possible that race
// conditions can cause this code to be triggered -- should test
// more)
int ret = LOCK_SUCCESS;
if ((res & JAWTFactory.JAWT_LOCK_SURFACE_CHANGED) != 0) {
ret = LOCK_SURFACE_CHANGED;
}
if (firstLock) {
AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
dsi = ds.GetDrawingSurfaceInfo();
return null;
}
});
} else {
dsi = ds.GetDrawingSurfaceInfo();
}
if (dsi == null) {
// Widget not yet realized
ds.Unlock();
getJAWT().FreeDrawingSurface(ds);
ds = null;
return LOCK_SURFACE_NOT_READY;
}
firstLock = false;
macosxdsi = (JAWT_MacOSXDrawingSurfaceInfo) dsi.platformInfo();
if (macosxdsi == null) {
// Widget not yet realized
ds.FreeDrawingSurfaceInfo(dsi);
ds.Unlock();
getJAWT().FreeDrawingSurface(ds);
ds = null;
dsi = null;
return LOCK_SURFACE_NOT_READY;
}
nsView = macosxdsi.cocoaViewRef();
if (nsView == 0) {
// Widget not yet realized
ds.FreeDrawingSurfaceInfo(dsi);
ds.Unlock();
getJAWT().FreeDrawingSurface(ds);
ds = null;
dsi = null;
macosxdsi = null;
return LOCK_SURFACE_NOT_READY;
}
return ret;
}
public void unlockSurface() throws GLException {
if (nsView == 0) {
throw new GLException("Surface already unlocked");
}
ds.FreeDrawingSurfaceInfo(dsi);
ds.Unlock();
getJAWT().FreeDrawingSurface(ds);
ds = null;
dsi = null;
macosxdsi = null;
nsView = 0;
}
//----------------------------------------------------------------------
// Internals only below this point
//
private JAWT getJAWT()
{
if (jawt == null)
{
JAWT j = JAWT.create();
j.version(JAWTFactory.JAWT_VERSION_1_4);
if (!JAWTFactory.JAWT_GetAWT(j))
{
throw new RuntimeException("Unable to initialize JAWT");
}
jawt = j;
}
return jawt;
}
}
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