xlib: don't explicitly create the pipe_winsys struct

src/gallium/winsys/xlib/xlib_brw_screen.c

@@ -351,9 +351,26 @@ xlib_create_brw_winsys( void )
 
 
 static struct pipe_screen *
-xlib_create_brw_screen( struct pipe_winsys *winsys )
+xlib_create_brw_screen( void )
 {
-   return brw_create_screen(winsys, 0/* XXX pci_id */);
+   struct pipe_winsys *winsys;
+   struct pipe_screen *screen;
+
+   winsys = xlib_create_brw_winsys();
+   if (winsys == NULL)
+      return NULL;
+
+   screen = brw_create_screen(winsys, 0/* XXX pci_id */);
+   if (screen == NULL)
+      goto fail;
+
+   return screen;
+
+fail:
+   if (winsys)
+      winsys->destroy( winsys );
+
+   return NULL;
 }
 
 
@@ -473,7 +490,6 @@ xlib_brw_display_surface(struct xmesa_buffer *b,
 
 struct xm_driver xlib_brw_driver = 
 {
-   .create_pipe_winsys = xlib_create_brw_winsys,
    .create_pipe_screen = xlib_create_brw_screen,
    .create_pipe_context = xlib_create_brw_context,
    .display_surface = xlib_brw_display_surface,

src/gallium/winsys/xlib/xlib_cell.c

@@ -414,7 +414,24 @@ xlib_create_cell_winsys( void )
 static struct pipe_screen *
 xlib_create_cell_screen( struct pipe_winsys *pws )
 {
-   return cell_create_screen( pws );
+   struct pipe_winsys *winsys;
+   struct pipe_screen *screen;
+
+   winsys = xlib_create_cell_winsys();
+   if (winsys == NULL)
+      return NULL;
+
+   screen = cell_create_screen(winsys);
+   if (screen == NULL)
+      goto fail;
+
+   return screen;
+
+fail:
+   if (winsys)
+      winsys->destroy( winsys );
+
+   return NULL;
 }
 
 
@@ -445,7 +462,6 @@ fail:
 
 struct xm_driver xlib_cell_driver = 
 {
-   .create_pipe_winsys = xlib_create_cell_winsys,
    .create_pipe_screen = xlib_create_cell_screen,
    .create_pipe_context = xlib_create_cell_context,
    .display_surface = xlib_cell_display_surface,
@@ -455,7 +471,6 @@ struct xm_driver xlib_cell_driver =
 
 struct xm_driver xlib_cell_driver = 
 {
-   .create_pipe_winsys = NULL,
    .create_pipe_screen = NULL,
    .create_pipe_context = NULL,
    .display_surface = NULL,

src/gallium/winsys/xlib/xlib_softpipe.c

@@ -232,7 +232,6 @@ xlib_softpipe_display_surface(struct xmesa_buffer *b,
    struct xm_buffer *xm_buf = xm_buffer(surf->buffer);
    static boolean no_swap = 0;
    static boolean firsttime = 1;
-   static int tileSize = 0;
 
    if (firsttime) {
       no_swap = getenv("SP_NO_RAST") != NULL;
@@ -482,17 +481,25 @@ xlib_create_softpipe_winsys( void )
 
 
 static struct pipe_screen *
-xlib_create_softpipe_screen( struct pipe_winsys *pws )
+xlib_create_softpipe_screen( void )
 {
+   struct pipe_winsys *winsys;
    struct pipe_screen *screen;
 
-   screen = softpipe_create_screen(pws);
+   winsys = xlib_create_softpipe_winsys();
+   if (winsys == NULL)
+      return NULL;
+
+   screen = softpipe_create_screen(winsys);
    if (screen == NULL)
       goto fail;
 
    return screen;
 
 fail:
+   if (winsys)
+      winsys->destroy( winsys );
+
    return NULL;
 }
 
@@ -517,7 +524,6 @@ fail:
 
 struct xm_driver xlib_softpipe_driver = 
 {
-   .create_pipe_winsys = xlib_create_softpipe_winsys,
    .create_pipe_screen = xlib_create_softpipe_screen,
    .create_pipe_context = xlib_create_softpipe_context,
    .display_surface = xlib_softpipe_display_surface

src/gallium/winsys/xlib/xlib_trace.c

@@ -38,19 +38,16 @@
 #include "trace/tr_screen.h"
 #include "trace/tr_context.h"
 
+#include "pipe/p_screen.h"
+
 
-static struct pipe_winsys *
-xlib_create_trace_winsys( void )
-{
-   return xlib_softpipe_driver.create_pipe_winsys();
-}
 
 static struct pipe_screen *
-xlib_create_trace_screen( struct pipe_winsys *winsys )
+xlib_create_trace_screen( void )
 {
    struct pipe_screen *screen, *trace_screen;
 
-   screen = xlib_softpipe_driver.create_pipe_screen( winsys );
+   screen = xlib_softpipe_driver.create_pipe_screen();
    if (screen == NULL)
       goto fail;
 
@@ -63,7 +60,8 @@ xlib_create_trace_screen( struct pipe_winsys *winsys )
    return trace_screen;
 
 fail:
-   /* free stuff */
+   if (screen)
+      screen->destroy( screen );
    return NULL;
 }
 
@@ -103,7 +101,6 @@ xlib_trace_display_surface( struct xmesa_buffer *buffer,
 
 struct xm_driver xlib_trace_driver = 
 {
-   .create_pipe_winsys = xlib_create_trace_winsys,
    .create_pipe_screen = xlib_create_trace_screen,
    .create_pipe_context = xlib_create_trace_context,
    .display_surface = xlib_trace_display_surface,