target-helpers: remove swrast_xlib.c helper

This was a good idea, but ended up tying the build systems in knots.
We can revisit this later, in particular if we can put in place dummy
implementations of cell_create_screen(), llvmpipe_create_screen()
which just return NULL if the driver isn't available.

In the meantime, just duplicate this smallish function in the two
places it was being called.

1 files changed, 59 insertions, 1 deletions

diff --git a/src/gallium/state_trackers/egl/x11/native_ximage.c b/src/gallium/state_trackers/egl/x11/native_ximage.c
index 544b3b4276..e0d12acabe 100644
--- a/src/gallium/state_trackers/egl/x11/native_ximage.c
+++ b/src/gallium/state_trackers/egl/x11/native_ximage.c
@@ -34,7 +34,11 @@
 #include "pipe/p_compiler.h"
 #include "util/u_inlines.h"
 #include "state_tracker/xlib_sw_winsys.h"
-#include "target-helpers/swrast_xlib.h"
+#include "target-helpers/wrap_screen.h"
+#include "util/u_debug.h"
+#include "softpipe/sp_public.h"
+#include "llvmpipe/lp_public.h"
+#include "cell/ppu/cell_public.h"
 #include "egllog.h"
 
 #include "native_x11.h"
@@ -614,6 +618,60 @@ ximage_display_destroy(struct native_display *ndpy)
    free(xdpy);
 }
 
+
+/* Helper function to build a subset of a driver stack consisting of
+ * one of the software rasterizers (cell, llvmpipe, softpipe) and the
+ * xlib winsys.
+ *
+ * This function could be shared, but currently causes headaches for
+ * the build systems, particularly scons if we try.
+ *
+ * Long term, want to avoid having global #defines for things like
+ * GALLIUM_LLVMPIPE, GALLIUM_CELL, etc.  Scons already eliminates
+ * those #defines, so things that are painful for it now are likely to
+ * be painful for other build systems in the future.
+ */
+static struct pipe_screen *
+swrast_xlib_create_screen( Display *display )
+{
+   struct sw_winsys *winsys;
+   struct pipe_screen *screen = NULL;
+
+   /* Create the underlying winsys, which performs presents to Xlib
+    * drawables:
+    */
+   winsys = xlib_create_sw_winsys( display );
+   if (winsys == NULL)
+      return NULL;
+
+   /* Create a software rasterizer on top of that winsys.  Use
+    * llvmpipe if it is available.
+    */
+#if defined(GALLIUM_LLVMPIPE)
+   if (screen == NULL &&
+       !debug_get_bool_option("GALLIUM_NO_LLVM", FALSE))
+      screen = llvmpipe_create_screen( winsys );
+#endif
+
+   if (screen == NULL)
+      screen = softpipe_create_screen( winsys );
+
+   if (screen == NULL)
+      goto fail;
+
+   /* Inject any wrapping layers we want to here:
+    */
+   return gallium_wrap_screen( screen );
+
+fail:
+   if (winsys)
+      winsys->destroy( winsys );
+
+   return NULL;
+}
+
+
+
 struct native_display *
 x11_create_ximage_display(EGLNativeDisplayType dpy,
                           struct native_event_handler *event_handler)