1 files changed, 243 insertions, 0 deletions
diff --git a/src/classes/com/sun/opengl/impl/macosx/cgl/MacOSXPbufferCGLDrawable.java b/src/classes/com/sun/opengl/impl/macosx/cgl/MacOSXPbufferCGLDrawable.java
new file mode 100644
index 000000000..6efe175fe
--- /dev/null
+++ b/src/classes/com/sun/opengl/impl/macosx/cgl/MacOSXPbufferCGLDrawable.java
@@ -0,0 +1,243 @@
+/*
+ * 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.cgl;
+
+import javax.media.opengl.*;
+import com.sun.opengl.impl.*;
+
+public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
+  private static final boolean DEBUG = Debug.debug("MacOSXPbufferCGLDrawable");
+  
+  // State for render-to-texture and render-to-texture-rectangle support
+  private int textureTarget; // e.g. GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_NV
+  private int texture;       // actual texture object
+
+  public MacOSXPbufferCGLDrawable(GLDrawableFactory factory, GLCapabilities capabilities, int initialWidth, int initialHeight) {
+    super(factory, new NullWindow(), true, capabilities, null);
+    NullWindow nw = (NullWindow) getNativeWindow();
+    nw.setSize(initialWidth, initialHeight);
+    initOpenGLImpl();
+    createPbuffer();
+  }
+
+  public GLContext createContext(GLContext shareWith) {
+    return new MacOSXPbufferCGLContext(this, shareWith);
+  }
+
+  public void destroy() {
+    getFactory().lockToolkit();
+    try {
+        NullWindow nw = (NullWindow) getNativeWindow();
+
+        if (nw.getWindowHandle() != 0) {
+          impl.destroy(nw.getWindowHandle());
+          nw.setWindowHandle(0);
+        
+          if (DEBUG) {
+            System.err.println("Destroyed pbuffer: " + nw);
+          }
+        }
+    } finally {
+        getFactory().unlockToolkit();
+    }
+  }
+
+  public void setSize(int width, int height) {
+    super.setSize(width, height);
+    destroy();
+    createPbuffer();
+  }
+
+  public long getPbuffer() {
+    return getNativeWindow().getWindowHandle();
+  }
+  
+  public void swapBuffers() throws GLException {
+    // FIXME: do we need to do anything if the pbuffer is double-buffered?
+  }
+
+  protected void createPbuffer() {
+    NullWindow nw = (NullWindow) getNativeWindow();
+    getFactory().lockToolkit();
+    try {
+        int renderTarget;
+        GLCapabilities capabilities = getCapabilities();
+        if (GLProfile.isGL2() && capabilities.getPbufferRenderToTextureRectangle()) {
+          renderTarget = GL2.GL_TEXTURE_RECTANGLE_EXT;
+        } else {
+          int w = getNextPowerOf2(getWidth());
+          int h = getNextPowerOf2(getHeight());
+          nw.setSize(w, h);
+          renderTarget = GL.GL_TEXTURE_2D;
+        }
+
+        int internalFormat = GL.GL_RGBA;
+        if (capabilities.getPbufferFloatingPointBuffers()) {
+          // FIXME: want to check availability of GL_APPLE_float_pixels
+          // extension, but need valid OpenGL context in order to do so --
+          // in worst case would need to create dummy window / GLCanvas
+          // (undesirable) -- could maybe also do this with pbuffers
+          /*
+          if (!gl.isExtensionAvailable("GL_APPLE_float_pixels")) {
+        throw new GLException("Floating-point support (GL_APPLE_float_pixels) not available");
+          }
+          */
+          if(GLProfile.isGL2()) {
+              switch (capabilities.getRedBits()) {
+                case 16: internalFormat = GL2.GL_RGBA_FLOAT16_APPLE; break;
+                case 32: internalFormat = GL2.GL_RGBA_FLOAT32_APPLE; break;
+                default: throw new GLException("Invalid floating-point bit depth (only 16 and 32 supported)");
+              }
+          } else {
+              internalFormat = GL.GL_RGBA;
+          }
+        }
+            
+        long pBuffer = impl.create(renderTarget, internalFormat, getWidth(), getHeight());
+        if (pBuffer == 0) {
+          throw new GLException("pbuffer creation error: CGL.createPBuffer() failed");
+        }
+        nw.setWindowHandle(pBuffer);
+    } finally {
+        getFactory().unlockToolkit();
+    }
+        
+    if (DEBUG) {
+      System.err.println("Created pbuffer " + nw + " for " + this);
+    }
+  }
+
+  private int getNextPowerOf2(int number) {
+    if (((number-1) & number) == 0) {
+      //ex: 8 -> 0b1000; 8-1=7 -> 0b0111; 0b1000&0b0111 == 0
+      return number;
+    }
+    int power = 0;
+    while (number > 0) {
+      number = number>>1;
+      power++;
+    }
+    return (1<<power);
+  }
+
+  //---------------------------------------------------------------------------
+  // 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 = 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");
+    }
+    destroy();
+    openGLMode = mode;
+    haveSetOpenGLMode = true;
+    if (DEBUG) {
+      System.err.println("Switching PBuffer drawable mode to " +
+                         ((mode == MacOSXCGLDrawable.NSOPENGL_MODE) ? "NSOPENGL_MODE" : "CGL_MODE"));
+    }
+    initOpenGLImpl();
+    createPbuffer();
+  }
+
+  public int getOpenGLMode() {
+    return openGLMode;
+  }
+
+  private void initOpenGLImpl() {
+    switch (openGLMode) {
+      case NSOPENGL_MODE:
+        impl = new NSOpenGLImpl();
+        break;
+      case CGL_MODE:
+        impl = new CGLImpl();
+        break;
+      default:
+        throw new InternalError("Illegal implementation mode " + openGLMode);
+    }
+  }
+
+  // Abstract interface for implementation of this drawable (either
+  // NSOpenGL-based or CGL-based)
+  interface Impl {
+    public long create(int renderTarget, int internalFormat, int width, int height);
+    public void destroy(long pbuffer);
+  }
+
+  // NSOpenGLPixelBuffer implementation
+  class NSOpenGLImpl implements Impl {
+    public long create(int renderTarget, int internalFormat, int width, int height) {
+      return CGL.createPBuffer(renderTarget, internalFormat, width, height);
+    }
+
+    public void destroy(long pbuffer) {
+      CGL.destroyPBuffer(0, pbuffer);
+    }
+  }
+
+  // CGL implementation
+  class CGLImpl implements Impl {
+    public long create(int renderTarget, int internalFormat, int width, int height) {
+      long[] pbuffer = new long[1];
+      int res = CGL.CGLCreatePBuffer(width, height, renderTarget, internalFormat, 0, pbuffer, 0);
+      if (res != CGL.kCGLNoError) {
+        throw new GLException("Error creating CGL-based pbuffer: error code " + res);
+      }
+      return pbuffer[0];
+    }
+
+    public void destroy(long pbuffer) {
+      int res = CGL.CGLDestroyPBuffer(pbuffer);
+      if (res != CGL.kCGLNoError) {
+        throw new GLException("Error destroying CGL-based pbuffer: error code " + res);
+      }
+    }
+  }
+}