xlib: allow winsys's to register themselves with glx/xlib state tracker

2 files changed, 34 insertions, 18 deletions

diff --git a/src/gallium/state_trackers/glx/xlib/xm_api.c b/src/gallium/state_trackers/glx/xlib/xm_api.c
index 82d125b5f3..4811641559 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_api.c
+++ b/src/gallium/state_trackers/glx/xlib/xm_api.c
@@ -71,6 +71,18 @@
 #include "xm_winsys.h"
 #include <GL/glx.h>
 
+
+/* Driver interface routines, set up by xlib backend on library
+ * _init().  These are global in the same way that function names are
+ * global.
+ */
+static struct xm_driver driver;
+
+void xmesa_set_driver( const struct xm_driver *templ )
+{
+   driver = *templ;
+}
+
 /**
  * Global X driver lock
  */
@@ -756,17 +768,17 @@ XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
    
    /* XXX: create once per Xlib Display.
     */
-   winsys = xmesa_create_pipe_winsys();
+   winsys = driver.create_pipe_winsys();
    if (winsys == NULL)
       goto fail;
 
    /* XXX: create once per Xlib Display.
     */
-   screen = xmesa_create_pipe_screen( winsys );
+   screen = driver.create_pipe_screen( winsys );
    if (screen == NULL)
       goto fail;
 
-   pipe = xmesa_create_pipe_context( screen,
+   pipe = driver.create_pipe_context( screen,
                                      (void *)c );
    if (pipe == NULL)
       goto fail;
@@ -1118,8 +1130,7 @@ void XMesaSwapBuffers( XMesaBuffer b )
 
    surf = st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT);
    if (surf) {
-      xmesa_display_surface(b, surf);
-//	 xmesa_display_surface(b, surf);
+      driver.display_surface(b, surf);
    }
 
    xmesa_check_and_update_buffer_size(NULL, b);
diff --git a/src/gallium/state_trackers/glx/xlib/xm_winsys.h b/src/gallium/state_trackers/glx/xlib/xm_winsys.h
index b22d65a569..8b6d1644e8 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_winsys.h
+++ b/src/gallium/state_trackers/glx/xlib/xm_winsys.h
@@ -36,22 +36,27 @@ struct pipe_surface;
 struct xmesa_buffer;
 
 
-/* Will turn this into a callback-style interface.  For now, these
- * have fixed names, and are implemented in the winsys/xlib directory.
- */
-struct pipe_winsys *xmesa_create_pipe_winsys( void );
-
-struct pipe_screen *xmesa_create_pipe_screen( struct pipe_winsys * );
-
-/* The context_private argument needs to go away.  Is currently used
- * in a round-about way to associate a display-target surface with its
- * Xlib window.
- */
-struct pipe_context *xmesa_create_pipe_context( struct pipe_screen *,
+struct xm_driver {
+
+   struct pipe_winsys *(*create_pipe_winsys)( void );
+
+   struct pipe_screen *(*create_pipe_screen)( struct pipe_winsys * );
+
+   /* The context_private argument needs to go away.  Is currently used
+    * in a round-about way to associate a display-target surface with its
+    * Xlib window.
+    */
+   struct pipe_context *(*create_pipe_context)( struct pipe_screen *,
                                                 void *context_private );
 
-void xmesa_display_surface( struct xmesa_buffer *, 
+   void (*display_surface)( struct xmesa_buffer *, 
                             struct pipe_surface * );
 
+};
+
+
+extern void
+xmesa_set_driver( const struct xm_driver *driver );
+
 
 #endif