5 files changed, 38 insertions, 11 deletions
diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index c8be7b07064..fc7755797d6 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -431,6 +431,10 @@ static void driCopySubBuffer(__DRIdrawable *drawable,
     dPriv->driScreenPriv->DriverAPI.CopySubBuffer(dPriv, x, y, w, h);
 }
 
+const __DRIcopySubBufferExtension driCopySubBufferExtension = {
+    { __DRI_COPY_SUB_BUFFER }, driCopySubBuffer
+};
+
 /**
  * This is called via __DRIscreenRec's createNewDrawable pointer.
  */
@@ -493,9 +497,6 @@ static void *driCreateNewDrawable(__DRIscreen *screen,
     pdraw->frameTracking = NULL;
     pdraw->queryFrameTracking = driQueryFrameTracking;
 
-    if (driCompareGLXAPIVersion (20060314) >= 0)
-	pdraw->copySubBuffer = driCopySubBuffer;
-
     /* This special default value is replaced with the configured
      * default value when the drawable is first bound to a direct
      * rendering context. 
@@ -624,13 +625,13 @@ driCreateNewContext(__DRIscreen *screen, const __GLcontextModes *modes,
 }
 /*@}*/
 
+
 static const __DRIextension **
 driGetExtensions(__DRIscreen *screen)
 {
     __DRIscreenPrivate *psp = screen->private;
-    static const __DRIextension *extensions[1];
 
-    return extensions;
+    return psp->extensions;
 }
 
 /*****************************************************************/
@@ -715,7 +716,7 @@ void * __DRI_CREATE_NEW_SCREEN( int scrn, __DRIscreen *psc,
 			     
 {
     __DRIscreenPrivate *psp;
-
+    static const __DRIextension emptyExtensionList[] = { NULL };
     dri_interface = interface;
     api_ver = internal_api_version;
 
@@ -747,6 +748,7 @@ void * __DRI_CREATE_NEW_SCREEN( int scrn, __DRIscreen *psc,
     psp->pDevPriv = frame_buffer->dev_priv;
     psp->fbBPP = psp->fbStride * 8 / frame_buffer->width;
 
+    psp->extensions = emptyExtensionList;
     psp->fd = fd;
     psp->myNum = scrn;
 
diff --git a/src/mesa/drivers/dri/common/dri_util.h b/src/mesa/drivers/dri/common/dri_util.h
index 5ac2eea7221..59bb66d21bc 100644
--- a/src/mesa/drivers/dri/common/dri_util.h
+++ b/src/mesa/drivers/dri/common/dri_util.h
@@ -74,6 +74,11 @@ typedef struct __DRIutilversionRec2    __DRIutilversion2;
 extern __GLcontextModes *__driDriverInitScreen(__DRIscreenPrivate *psp);
 
 /**
+ * Extensions.
+ */
+extern const __DRIcopySubBufferExtension driCopySubBufferExtension;
+
+/**
  * Used by DRI_VALIDATE_DRAWABLE_INFO
  */
 #define DRI_VALIDATE_DRAWABLE_INFO_ONCE(pDrawPriv)              \
@@ -461,8 +466,12 @@ struct __DRIscreenPrivateRec {
     /**
      * Pointer back to the \c __DRIscreen that contains this structure.
      */
-
     __DRIscreen *psc;
+
+    /**
+     * Extensions provided by this driver.
+     */
+    const __DRIextension **extensions;
 };
 
 
diff --git a/src/mesa/drivers/dri/i915/intel_screen.c b/src/mesa/drivers/dri/i915/intel_screen.c
index a75133ec738..792f26b5ed4 100644
--- a/src/mesa/drivers/dri/i915/intel_screen.c
+++ b/src/mesa/drivers/dri/i915/intel_screen.c
@@ -419,9 +419,13 @@ intelUpdateScreenFromSAREA(intelScreenPrivate * intelScreen,
       intelPrintSAREA(sarea);
 }
 
+static const __DRIextension *intelExtensions[] = {
+    &driCopySubBufferExtension.base,
+    NULL
+};
 
-static GLboolean
-intelInitDriver(__DRIscreenPrivate * sPriv)
+
+static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
 {
    intelScreenPrivate *intelScreen;
    I830DRIPtr gDRIPriv = (I830DRIPtr) sPriv->pDevPriv;
@@ -522,6 +526,8 @@ intelInitDriver(__DRIscreenPrivate * sPriv)
       }
    }
 
+   sPriv->extensions = intelExtensions;
+
    if (glx_enable_extension != NULL) {
       (*glx_enable_extension) (sPriv->psc, "GLX_SGI_swap_control");
       (*glx_enable_extension) (sPriv->psc, "GLX_SGI_video_sync");
diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index f0bce146b08..1f74103f651 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -264,6 +264,10 @@ intelUpdateScreenFromSAREA(intelScreenPrivate *intelScreen,
       intelPrintSAREA(sarea);
 }
 
+static const __DRIextension *intelExtensions[] = {
+    &driCopySubBufferExtension.base,
+    NULL
+};
 
 static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
 {
@@ -350,13 +354,14 @@ static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
       }
    }
 
+   sPriv->extensions = intelExtensions;
+
    if (glx_enable_extension != NULL) {
       (*glx_enable_extension)( sPriv->psc, "GLX_SGI_swap_control" );
       (*glx_enable_extension)( sPriv->psc, "GLX_SGI_video_sync" );
       (*glx_enable_extension)( sPriv->psc, "GLX_MESA_swap_control" );
       (*glx_enable_extension)( sPriv->psc, "GLX_MESA_swap_frame_usage" );
       (*glx_enable_extension)( sPriv->psc, "GLX_SGI_make_current_read" );
-      (*glx_enable_extension)( sPriv->psc, "GLX_MESA_copy_sub_buffer" );
    }
    
    return GL_TRUE;
diff --git a/src/mesa/drivers/dri/radeon/radeon_screen.c b/src/mesa/drivers/dri/radeon/radeon_screen.c
index b7e0b5a0fa3..7e533fef2cc 100644
--- a/src/mesa/drivers/dri/radeon/radeon_screen.c
+++ b/src/mesa/drivers/dri/radeon/radeon_screen.c
@@ -332,6 +332,10 @@ radeonFillInModes( unsigned pixel_bits, unsigned depth_bits,
     return modes;
 }
 
+static const __DRIextension *radeonExtensions[] = {
+    &driCopySubBufferExtension.base,
+    NULL
+};
 
 /* Create the device specific screen private data struct.
  */
@@ -731,6 +735,8 @@ radeonCreateScreen( __DRIscreenPrivate *sPriv )
 	 dri_priv->log2GARTTexGran;
    }
 
+   sPriv->extensions = radeonExtensions;
+
    if ( glx_enable_extension != NULL ) {
       if ( screen->irq != 0 ) {
 	 (*glx_enable_extension)( sPriv->psc, "GLX_SGI_swap_control" );
@@ -742,7 +748,6 @@ radeonCreateScreen( __DRIscreenPrivate *sPriv )
       if (IS_R200_CLASS(screen))
 	 (*glx_enable_extension)( sPriv->psc, "GLX_MESA_allocate_memory" );
 
-      (*glx_enable_extension)( sPriv->psc, "GLX_MESA_copy_sub_buffer" );
       (*glx_enable_extension)( sPriv->psc, "GLX_SGI_make_current_read" );
    }