From d7b298938af58a4243badd9d90da2efa75c8923a Mon Sep 17 00:00:00 2001
From: Kenneth Russel <kbrussel@alum.mit.edu>
Date: Mon, 3 Apr 2006 21:16:16 +0000
Subject: Added workaround for apparent problem with ATI's proprietary drivers
 where GL calls seem to result in GLX tokens being sent even for direct
 contexts, necessitating disabling of optimized on-screen context handling

git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@701 232f8b59-042b-4e1e-8c03-345bb8c30851
---
 src/classes/com/sun/opengl/impl/x11/X11GLContext.java  |  5 +++++
 .../com/sun/opengl/impl/x11/X11GLDrawableFactory.java  | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+)

(limited to 'src/classes/com/sun/opengl/impl')

diff --git a/src/classes/com/sun/opengl/impl/x11/X11GLContext.java b/src/classes/com/sun/opengl/impl/x11/X11GLContext.java
index b6c4fbfcd..0ed5eaebb 100644
--- a/src/classes/com/sun/opengl/impl/x11/X11GLContext.java
+++ b/src/classes/com/sun/opengl/impl/x11/X11GLContext.java
@@ -298,6 +298,11 @@ public abstract class X11GLContext extends GLContextImpl {
     throw new GLException("Should not call this");
   }
 
+  public boolean isOptimizable() {
+    return (super.isOptimizable() &&
+            !X11GLDrawableFactory.getX11Factory().isVendorATI());
+  }
+
   //----------------------------------------------------------------------
   // Internals only below this point
   //
diff --git a/src/classes/com/sun/opengl/impl/x11/X11GLDrawableFactory.java b/src/classes/com/sun/opengl/impl/x11/X11GLDrawableFactory.java
index 257fdab6e..9ba591e5f 100644
--- a/src/classes/com/sun/opengl/impl/x11/X11GLDrawableFactory.java
+++ b/src/classes/com/sun/opengl/impl/x11/X11GLDrawableFactory.java
@@ -56,6 +56,11 @@ public class X11GLDrawableFactory extends GLDrawableFactoryImpl {
   // There is currently a bug on Linux/AMD64 distributions in glXGetProcAddressARB
   private static boolean isLinuxAMD64;
 
+  // ATI's proprietary drivers apparently send GLX tokens even for
+  // direct contexts, so we need to disable the context optimizations
+  // in this case
+  private static boolean isVendorATI;
+
   static {
     // See DRIHack.java for an explanation of why this is necessary
     DRIHack.begin();
@@ -444,6 +449,13 @@ public class X11GLDrawableFactory extends GLDrawableFactoryImpl {
           System.err.println("!!! GLX client version: " +
                              GLX.glXGetClientString(display, GLX.GLX_VERSION));
         }
+
+        if (staticDisplay != 0) {
+          String vendor = GLX.glXGetClientString(staticDisplay, GLX.GLX_VENDOR);
+          if (vendor != null && vendor.startsWith("ATI")) {
+            isVendorATI = true;
+          }
+        }
       } finally {
         getX11Factory().unlockToolkit();
       }
@@ -493,6 +505,12 @@ public class X11GLDrawableFactory extends GLDrawableFactoryImpl {
     return (X11GLDrawableFactory) getFactory();
   }
 
+  /** Workaround for apparent issue with ATI's proprietary drivers
+      where direct contexts still send GLX tokens for GL calls */
+  public static boolean isVendorATI() {
+    return isVendorATI;
+  }
+
   private void maybeDoSingleThreadedWorkaround(Runnable action) {
     if (Threading.isSingleThreaded() &&
         !Threading.isOpenGLThread()) {
-- 
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