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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
* MIDROSYSTEMS, 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 net.java.games.jogl.impl.x11;
import java.awt.image.BufferedImage;
import net.java.games.jogl.*;
import net.java.games.jogl.impl.*;
public class X11OffscreenGLContext extends X11GLContext {
private int pixmap;
private boolean isDoubleBuffered;
// Width and height of the underlying bitmap
private int width;
private int height;
// Display connection for use by all offscreen surfaces
private long staticDisplay;
public X11OffscreenGLContext(GLCapabilities capabilities, GLCapabilitiesChooser chooser) {
super(null, capabilities, chooser);
}
protected GL createGL()
{
return new X11GLImpl(this);
}
protected boolean isOffscreen() {
return true;
}
public int getOffscreenContextBufferedImageType() {
if (capabilities.getAlphaBits() > 0) {
return BufferedImage.TYPE_INT_ARGB;
} else {
return BufferedImage.TYPE_INT_RGB;
}
}
public int getOffscreenContextReadBuffer() {
if (isDoubleBuffered) {
return GL.GL_BACK;
}
return GL.GL_FRONT;
}
public boolean offscreenImageNeedsVerticalFlip() {
// There doesn't seem to be a way to do this in the construction
// of the Pixmap or GLXPixmap
return true;
}
public boolean canCreatePbufferContext() {
// For now say no
return false;
}
public synchronized GLContext createPbufferContext(GLCapabilities capabilities,
int initialWidth,
int initialHeight) {
throw new GLException("Not supported");
}
public void bindPbufferToTexture() {
throw new GLException("Should not call this");
}
public void releasePbufferFromTexture() {
throw new GLException("Should not call this");
}
protected synchronized boolean makeCurrent(Runnable initAction) throws GLException {
ensureDisplayOpened();
if (pendingOffscreenResize) {
if (pendingOffscreenWidth != width || pendingOffscreenWidth != height) {
if (context != 0) {
destroy();
}
width = pendingOffscreenWidth;
height = pendingOffscreenHeight;
pendingOffscreenResize = false;
}
}
return super.makeCurrent(initAction);
}
protected synchronized void swapBuffers() throws GLException {
}
protected synchronized void free() throws GLException {
try {
super.free();
} finally {
display = 0;
}
}
protected void create() {
XVisualInfo vis = chooseVisual();
int bitsPerPixel = vis.depth();
if (display == 0) {
throw new GLException("No active display");
}
int screen = GLX.DefaultScreen(display);
pixmap = GLX.XCreatePixmap(display, (int) GLX.RootWindow(display, screen), width, height, bitsPerPixel);
if (pixmap == 0) {
throw new GLException("XCreatePixmap failed");
}
drawable = GLX.glXCreateGLXPixmap(display, vis, pixmap);
if (drawable == 0) {
throw new GLException("glXCreateGLXPixmap failed");
}
context = createContext(vis, false);
if (context == 0) {
throw new GLException("Unable to create OpenGL context");
}
isDoubleBuffered = (glXGetConfig(vis, GLX.GLX_DOUBLEBUFFER, new int[1]) != 0);
}
private void ensureDisplayOpened() {
if (staticDisplay == 0) {
staticDisplay = GLX.XOpenDisplay(null);
if (staticDisplay == 0) {
throw new GLException("Unable to open default display, needed for offscreen surface handling");
}
}
display = staticDisplay;
}
private void destroy() {
// Must destroy OpenGL context, pixmap and GLXPixmap
GLX.glXDestroyContext(display, context);
GLX.glXDestroyGLXPixmap(display, (int) drawable);
GLX.XFreePixmap(display, pixmap);
context = 0;
drawable = 0;
pixmap = 0;
}
}
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