Added support for sharing of textures, etc. between GLPbuffers and

GLJPanels when the Java2D/JOGL bridge is active on Mac OS X. This
required adding an alternate implementation for pbuffer drawables and
contexts on OS X which uses CGL rather than the NextStep OpenGL APIs.
Tested with advance Mustang bits on Mac OS X; Water and
HWShadowmapsSimple demos (which use pbuffers) are now working within
the JRefract harness when the Java2D/JOGL bridge is active.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@855 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 246 insertions, 7 deletions

diff --git a/src/classes/com/sun/opengl/impl/macosx/MacOSXPbufferGLContext.java b/src/classes/com/sun/opengl/impl/macosx/MacOSXPbufferGLContext.java
index a1251bd70..c4e3058da 100644
--- a/src/classes/com/sun/opengl/impl/macosx/MacOSXPbufferGLContext.java
+++ b/src/classes/com/sun/opengl/impl/macosx/MacOSXPbufferGLContext.java
@@ -32,6 +32,7 @@ public class MacOSXPbufferGLContext extends MacOSXGLContext {
                                 GLContext shareWith) {
     super(drawable, shareWith);
     this.drawable = drawable;
+    initOpenGLImpl();
   }
 
   public void bindPbufferToTexture() {
@@ -55,8 +56,28 @@ public class MacOSXPbufferGLContext extends MacOSXGLContext {
       return CONTEXT_NOT_CURRENT;
     }
 
-    int res = super.makeCurrentImpl();
-    if (res == CONTEXT_CURRENT_NEW) {
+    if (getOpenGLMode() != drawable.getOpenGLMode()) {
+      setOpenGLMode(drawable.getOpenGLMode());
+    }
+
+    boolean created = false;
+    if (nsContext == 0) {
+      if (!create()) {
+        return CONTEXT_NOT_CURRENT;
+      }
+      if (DEBUG) {
+        System.err.println("!!! Created OpenGL context " + toHexString(nsContext) + " for " + getClass().getName());
+      }
+      created = true;
+    }
+    
+    if (!impl.makeCurrent(nsContext)) {
+      throw new GLException("Error making nsContext current");
+    }
+            
+    if (created) {
+      resetGLFunctionAvailability();
+
       // Initialize render-to-texture support if requested
       boolean rect = drawable.getCapabilities().getPbufferRenderToTextureRectangle();
       GL gl = getGL();
@@ -77,8 +98,36 @@ public class MacOSXPbufferGLContext extends MacOSXGLContext {
       gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
       gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
       gl.glCopyTexImage2D(textureTarget, 0, GL.GL_RGB, 0, 0, drawable.getWidth(), drawable.getHeight(), 0);
+
+      return CONTEXT_CURRENT_NEW;
+    }
+    return CONTEXT_CURRENT;
+  }
+
+  protected void releaseImpl() throws GLException {
+    if (!impl.release(nsContext)) {
+      throw new GLException("Error releasing OpenGL nsContext");
+    }
+  }
+
+  protected void destroyImpl() throws GLException {
+    if (nsContext != 0) {
+      if (!impl.destroy(nsContext)) {
+        throw new GLException("Unable to delete OpenGL context");
+      }
+      if (DEBUG) {
+        System.err.println("!!! Destroyed OpenGL context " + nsContext);
+      }
+      nsContext = 0;
+      GLContextShareSet.contextDestroyed(this);
     }
-    return res;
+  }
+
+  public void setSwapInterval(int interval) {
+    if (nsContext == 0) {
+      throw new GLException("OpenGL context not current");
+    }
+    impl.setSwapInterval(nsContext, interval);
   }
 
   public int getFloatingPointMode() {
@@ -91,11 +140,201 @@ public class MacOSXPbufferGLContext extends MacOSXGLContext {
 	!isTigerOrLater) {
       throw new GLException("Floating-point pbuffers supported only on OS X 10.4 or later");
     }
-    if (!super.create(true, capabilities.getPbufferFloatingPointBuffers())) {
-      return false;
+    // Change our OpenGL mode to match that of any share context before we create ourselves
+    MacOSXGLContext other = (MacOSXGLContext) GLContextShareSet.getShareContext(this);
+    if (other != null) {
+      setOpenGLMode(other.getOpenGLMode());
     }
-    // Must now associate the pbuffer with our newly-created context
-    CGL.setContextPBuffer(nsContext, drawable.getPbuffer());
+    // Will throw exception upon error
+    nsContext = impl.create();
     return true;
   }
+
+  //---------------------------------------------------------------------------
+  // OpenGL "mode switching" functionality
+  //
+  private boolean haveSetOpenGLMode = false;
+  // FIXME: should consider switching the default mode based on
+  // whether the Java2D/JOGL bridge is active -- need to ask ourselves
+  // whether it's more likely that we will share with a GLCanvas or a
+  // GLJPanel when the bridge is turned on
+  private int     openGLMode = MacOSXGLDrawable.NSOPENGL_MODE;
+  // Implementation object (either NSOpenGL-based or CGL-based)
+  protected Impl impl;
+
+  public void setOpenGLMode(int mode) {
+    if (mode == openGLMode) {
+      return;
+    }
+    if (haveSetOpenGLMode) {
+      throw new GLException("Can't switch between using NSOpenGLPixelBuffer and CGLPBufferObj more than once");
+    }
+    destroyImpl();
+    drawable.setOpenGLMode(mode);
+    openGLMode = mode;
+    haveSetOpenGLMode = true;
+    if (DEBUG) {
+      System.err.println("Switching PBuffer context mode to " +
+                         ((mode == MacOSXGLDrawable.NSOPENGL_MODE) ? "NSOPENGL_MODE" : "CGL_MODE"));
+    }
+    initOpenGLImpl();
+  }
+
+  public int  getOpenGLMode() {
+    return openGLMode;
+  }
+
+  private void initOpenGLImpl() {
+    switch (openGLMode) {
+      case MacOSXGLDrawable.NSOPENGL_MODE:
+        impl = new NSOpenGLImpl();
+        break;
+      case MacOSXGLDrawable.CGL_MODE:
+        impl = new CGLImpl();
+        break;
+      default:
+        throw new InternalError("Illegal implementation mode " + openGLMode);
+    }
+  }
+
+  // Abstract interface for implementation of this context (either
+  // NSOpenGL-based or CGL-based)
+  interface Impl {
+    public long    create();
+    public boolean destroy(long ctx);
+    public boolean makeCurrent(long ctx);
+    public boolean release(long ctx);
+    public void    setSwapInterval(long ctx, int interval);
+  }
+
+  // NSOpenGLContext-based implementation
+  class NSOpenGLImpl implements Impl {
+    public long create() {
+      GLCapabilities capabilities = drawable.getCapabilities();
+      if (capabilities.getPbufferFloatingPointBuffers() &&
+          !isTigerOrLater) {
+        throw new GLException("Floating-point pbuffers supported only on OS X 10.4 or later");
+      }
+      if (!MacOSXPbufferGLContext.this.create(true, capabilities.getPbufferFloatingPointBuffers())) {
+        throw new GLException("Error creating context for pbuffer");
+      }
+      // Must now associate the pbuffer with our newly-created context
+      CGL.setContextPBuffer(nsContext, drawable.getPbuffer());
+      return nsContext;
+    }
+
+    public boolean destroy(long ctx) {
+      return CGL.deleteContext(ctx);
+    }
+
+    public boolean makeCurrent(long ctx) {
+      return CGL.makeCurrentContext(ctx);
+    }
+
+    public boolean release(long ctx) {
+      return CGL.clearCurrentContext(ctx);
+    }
+
+    public void setSwapInterval(long ctx, int interval) {
+      CGL.setSwapInterval(ctx, interval);      
+    }
+  }
+
+  class CGLImpl implements Impl {
+    public long create() {
+      // Find and configure share context
+      MacOSXGLContext other = (MacOSXGLContext) GLContextShareSet.getShareContext(MacOSXPbufferGLContext.this);
+      long share = 0;
+      if (other != null) {
+        // Reconfigure pbuffer-based GLContexts
+        if (other instanceof MacOSXPbufferGLContext) {
+          MacOSXPbufferGLContext ctx = (MacOSXPbufferGLContext) other;
+          ctx.setOpenGLMode(MacOSXGLDrawable.CGL_MODE);
+        } else {
+          if (other.getOpenGLMode() != MacOSXGLDrawable.CGL_MODE) {
+            throw new GLException("Can't share between NSOpenGLContexts and CGLContextObjs");
+          }
+        }
+        share = other.getNSContext();
+        // Note we don't check for a 0 return value, since switching
+        // the context's mode causes it to be destroyed and not
+        // re-initialized until the next makeCurrent
+      }
+
+      // Set up pixel format attributes
+      int[] attrs = new int[256];
+      int i = 0;
+      attrs[i++] = CGL.kCGLPFAPBuffer;
+      GLCapabilities capabilities = drawable.getCapabilities();
+      if (capabilities.getPbufferFloatingPointBuffers())
+        attrs[i++] = CGL.kCGLPFAColorFloat;
+      if (capabilities.getDoubleBuffered())
+        attrs[i++] = CGL.kCGLPFADoubleBuffer;
+      if (capabilities.getStereo())
+        attrs[i++] = CGL.kCGLPFAStereo;
+      attrs[i++] = CGL.kCGLPFAColorSize;
+      attrs[i++] = (capabilities.getRedBits() +
+                    capabilities.getGreenBits() +
+                    capabilities.getBlueBits());
+      attrs[i++] = CGL.kCGLPFAAlphaSize;
+      attrs[i++] = capabilities.getAlphaBits();
+      attrs[i++] = CGL.kCGLPFADepthSize;
+      attrs[i++] = capabilities.getDepthBits();
+      // FIXME: should validate stencil size as is done in MacOSXWindowSystemInterface.m
+      attrs[i++] = CGL.kCGLPFAStencilSize;
+      attrs[i++] = capabilities.getStencilBits();
+      attrs[i++] = CGL.kCGLPFAAccumSize;
+      attrs[i++] = (capabilities.getAccumRedBits() +
+                    capabilities.getAccumGreenBits() +
+                    capabilities.getAccumBlueBits() +
+                    capabilities.getAccumAlphaBits());
+      if (capabilities.getSampleBuffers()) {
+        attrs[i++] = CGL.kCGLPFASampleBuffers;
+        attrs[i++] = 1;
+        attrs[i++] = CGL.kCGLPFASamples;
+        attrs[i++] = capabilities.getNumSamples();
+      }
+
+      // Use attribute array to select pixel format
+      long[] fmt = new long[1];
+      long[] numScreens = new long[1];
+      int res = CGL.CGLChoosePixelFormat(attrs, 0, fmt, 0, numScreens, 0);
+      if (res != CGL.kCGLNoError) {
+        throw new GLException("Error code " + res + " while choosing pixel format");
+      }
+      
+      // Create new context
+      long[] ctx = new long[1];
+      if (DEBUG) {
+        System.err.println("Share context for CGL-based pbuffer context is " + toHexString(share));
+      }
+      res = CGL.CGLCreateContext(fmt[0], share, ctx, 0);
+      CGL.CGLDestroyPixelFormat(fmt[0]);
+      if (res != CGL.kCGLNoError) {
+        throw new GLException("Error code " + res + " while creating context");
+      }
+      // Attach newly-created context to the pbuffer
+      res = CGL.CGLSetPBuffer(ctx[0], drawable.getPbuffer(), 0, 0, 0);
+      if (res != CGL.kCGLNoError) {
+        throw new GLException("Error code " + res + " while attaching context to pbuffer");
+      }
+      return ctx[0];
+    }
+    
+    public boolean destroy(long ctx) {
+      return (CGL.CGLDestroyContext(ctx) == CGL.kCGLNoError);
+    }
+
+    public boolean makeCurrent(long ctx) {
+      return CGL.CGLSetCurrentContext(ctx) == CGL.kCGLNoError;
+    }
+
+    public boolean release(long ctx) {
+      return (CGL.CGLSetCurrentContext(0) == CGL.kCGLNoError);
+    }
+
+    public void setSwapInterval(long ctx, int interval) {
+      // For now not supported (not really relevant for off-screen contexts anyway)
+    }
+  }
 }