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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 javax.media.opengl.*;
import com.sun.opengl.impl.*;
public abstract class MacOSXGLDrawable extends GLDrawableImpl {
protected static final boolean DEBUG = Debug.debug("MacOSXGLDrawable");
protected GLCapabilities capabilities;
protected GLCapabilitiesChooser chooser;
// 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 MacOSXGLDrawable 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 static final int NSOPENGL_MODE = 1;
public static final int CGL_MODE = 2;
public MacOSXGLDrawable(GLCapabilities capabilities,
GLCapabilitiesChooser chooser) {
this.capabilities = (GLCapabilities) capabilities.clone();
this.chooser = chooser;
}
public void setRealized(boolean val) {
throw new GLException("Should not call this (should only be called for onscreen GLDrawables)");
}
public void destroy() {
throw new GLException("Should not call this (should only be called for offscreen GLDrawables)");
}
public void swapBuffers() throws GLException {
}
public GLCapabilities getCapabilities() {
int numFormats = 1;
GLCapabilities availableCaps[] = new GLCapabilities[numFormats];
availableCaps[0] = capabilities;
int pixelFormat = chooser.chooseCapabilities(capabilities, availableCaps, 0);
if ((pixelFormat < 0) || (pixelFormat >= numFormats)) {
throw new GLException("Invalid result " + pixelFormat +
" from GLCapabilitiesChooser (should be between 0 and " +
(numFormats - 1) + ")");
}
if (DEBUG) {
System.err.println(getThreadName() + ": Chosen pixel format (" + pixelFormat + "):");
System.err.println(availableCaps[pixelFormat]);
}
return availableCaps[pixelFormat];
}
// Only used for on-screen contexts
public long getView() {
return 0;
}
protected static String getThreadName() {
return Thread.currentThread().getName();
}
// Support for "mode switching" as per above
public abstract void setOpenGLMode(int mode);
public abstract int getOpenGLMode();
}
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