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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.windows.wgl;
import javax.media.nativewindow.AbstractGraphicsScreen;
import javax.media.nativewindow.DefaultGraphicsScreen;
import javax.media.nativewindow.NativeSurface;
import javax.media.nativewindow.NativeWindowFactory;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLContext;
import javax.media.opengl.GLDrawableFactory;
import javax.media.opengl.GLException;
import javax.media.opengl.GLProfile;
import com.jogamp.nativewindow.WrappedSurface;
import jogamp.nativewindow.windows.GDI;
import jogamp.opengl.GLContextShareSet;
public class WindowsExternalWGLContext extends WindowsWGLContext {
private GLContext lastContext;
private WindowsExternalWGLContext(Drawable drawable, long ctx, WindowsWGLGraphicsConfiguration cfg) {
super(drawable, null);
this.contextHandle = ctx;
if (DEBUG) {
System.err.println(getThreadName() + ": Created external OpenGL context " + toHexString(ctx) + " for " + this);
}
GLContextShareSet.contextCreated(this);
setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT); // use GL_VERSION
getGLStateTracker().setEnabled(false); // external context usage can't track state in Java
}
protected static WindowsExternalWGLContext create(GLDrawableFactory factory, GLProfile glp) {
if(DEBUG) {
System.err.println("WindowsExternalWGLContext 0: werr: " + GDI.GetLastError());
}
final long ctx = WGL.wglGetCurrentContext();
if (0 == ctx) {
throw new GLException("Error: attempted to make an external GLContext without a context current, werr " + GDI.GetLastError());
}
final long hdc = WGL.wglGetCurrentDC();
if (0 == hdc) {
throw new GLException("Error: attempted to make an external GLDrawable without a drawable current, werr " + GDI.GetLastError());
}
AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
WindowsWGLGraphicsConfiguration cfg;
final int pfdID = WGLUtil.GetPixelFormat(hdc);
if (0 == pfdID) {
// This could have happened if the HDC was released right after the GL ctx made current (SWT),
// WinXP-32bit will not be able to use this HDC afterwards.
// Workaround: Use a fake default configuration
final int werr = GDI.GetLastError();
cfg = WindowsWGLGraphicsConfigurationFactory.createDefaultGraphicsConfiguration(new GLCapabilities(GLProfile.getDefault()), aScreen);
cfg.markExternal();
if(DEBUG) {
System.err.println("WindowsExternalWGLContext invalid hdc/pfd werr "+werr+", using default cfg: " + cfg);
}
} else {
cfg = WindowsWGLGraphicsConfiguration.createFromExternal(factory, hdc, pfdID, glp, aScreen, true);
if(DEBUG) {
System.err.println("WindowsExternalWGLContext valid hdc/pfd, retrieved cfg: " + cfg);
}
}
return new WindowsExternalWGLContext(new Drawable(factory, new WrappedSurface(cfg, hdc)), ctx, cfg);
}
@Override
public int makeCurrent() throws GLException {
// Save last context if necessary to allow external GLContexts to
// talk to other GLContexts created by this library
GLContext cur = getCurrent();
if (cur != null && cur != this) {
lastContext = cur;
setCurrent(null);
}
return super.makeCurrent();
}
@Override
public void release() throws GLException {
super.release();
setCurrent(lastContext);
lastContext = null;
}
@Override
protected void makeCurrentImpl() throws GLException {
}
@Override
protected void releaseImpl() throws GLException {
}
@Override
protected void destroyImpl() throws GLException {
}
// Need to provide the display connection to extension querying APIs
static class Drawable extends WindowsWGLDrawable {
Drawable(GLDrawableFactory factory, NativeSurface comp) {
super(factory, comp, true);
}
@Override
public GLContext createContext(GLContext shareWith) {
throw new GLException("Should not call this");
}
@Override
public int getWidth() {
throw new GLException("Should not call this");
}
@Override
public int getHeight() {
throw new GLException("Should not call this");
}
public void setSize(int width, int height) {
throw new GLException("Should not call this");
}
}
}
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