Enable GLX_SGI_make_current_read for tdfx.

Implement GLX_SGI_make_current_read for tdfx.  Remove annoying debug
printf in tdfxSwapBuffers.  Updated a comment in drirenderbuffer.h to
note that the tdfx driver uses a flag that was previously only used by
s3v.

This code was tested with glxgears, wincopy, and manywin.

1 files changed, 11 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/tdfx/tdfx_context.h b/src/mesa/drivers/dri/tdfx/tdfx_context.h
index b8349fec73..89a7a9d6c4 100644
--- a/src/mesa/drivers/dri/tdfx/tdfx_context.h
+++ b/src/mesa/drivers/dri/tdfx/tdfx_context.h
@@ -895,7 +895,17 @@ struct tdfx_context {
    /* stuff added for DRI */
    __DRIscreenPrivate *driScreen;
    __DRIcontextPrivate *driContext;
-   __DRIdrawablePrivate *driDrawable;
+
+   /**
+    * DRI drawable bound to this context for drawing.
+    */
+   __DRIdrawablePrivate	*driDrawable;
+
+   /**
+    * DRI drawable bound to this context for reading.
+    */
+   __DRIdrawablePrivate	*driReadable;
+
    drm_context_t hHWContext;
    drm_hw_lock_t *driHwLock;
    int driFd;