Fixed Issue 213: Expose GLCaps from GLDrawable

Added getChosenGLCapabilities() to the GLDrawable interface.
Implemented on Windows, Unix and Mac OS X platforms with various
techniques. Attempts to provide correct answers in all cases, even
when the GLCapabilitiesChooser mechanism is not supported. Required
addition of new platform-specific Java code in most cases to either
re-convert existing PIXELFORMATDESCRIPTORS / XVisualInfos, or to query
the pixel format or visual chosen for drawables like pbuffers for
which the chooser mechanism is not (yet) implemented. Tested on
Windows, Solaris/x86, and Mac OS X with on-screen, off-screen and
pbuffer drawables. (Full support for the Java2D/JOGL bridge is not yet
in place; the answer returned from the GLJPanel in this case is
currently the default GLCapabilities, and it is likely that "external"
GLDrawables will return null.)


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@989 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 14 insertions, 0 deletions

diff --git a/src/classes/com/sun/opengl/impl/GLDrawableImpl.java b/src/classes/com/sun/opengl/impl/GLDrawableImpl.java
index f93ed9663..df1aab796 100644
--- a/src/classes/com/sun/opengl/impl/GLDrawableImpl.java
+++ b/src/classes/com/sun/opengl/impl/GLDrawableImpl.java
@@ -42,6 +42,8 @@ package com.sun.opengl.impl;
 import javax.media.opengl.*;
 
 public abstract class GLDrawableImpl implements GLDrawable {
+  private GLCapabilities chosenCapabilities;
+
   /** For offscreen GLDrawables (pbuffers and "pixmap" drawables),
       indicates that native resources should be reclaimed. */
   public abstract void destroy() throws GLException;
@@ -49,4 +51,16 @@ public abstract class GLDrawableImpl implements GLDrawable {
   public static String toHexString(long hex) {
     return GLContextImpl.toHexString(hex);
   }
+
+  public GLCapabilities getChosenGLCapabilities() {
+    if (chosenCapabilities == null)
+      return null;
+
+    // Must return a new copy to avoid mutation by end user
+    return (GLCapabilities) chosenCapabilities.clone();
+  }
+
+  public void setChosenGLCapabilities(GLCapabilities caps) {
+    chosenCapabilities = caps;
+  }
 }