Initial revision

git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@3 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 177 insertions, 0 deletions

diff --git a/src/net/java/games/jogl/impl/x11/X11OffscreenGLContext.java b/src/net/java/games/jogl/impl/x11/X11OffscreenGLContext.java
new file mode 100644
index 000000000..62fd380ee
--- /dev/null
+++ b/src/net/java/games/jogl/impl/x11/X11OffscreenGLContext.java
@@ -0,0 +1,177 @@
+/*
+ * 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;
+  }
+}