graw-null: New target to ensure we always have a graw implementation available.

1 files changed, 83 insertions, 0 deletions

diff --git a/src/gallium/targets/graw-null/graw_null.c b/src/gallium/targets/graw-null/graw_null.c
new file mode 100644
index 0000000000..293015bc6b
--- /dev/null
+++ b/src/gallium/targets/graw-null/graw_null.c
@@ -0,0 +1,83 @@
+#include "pipe/p_compiler.h"
+#include "util/u_debug.h"
+#include "util/u_memory.h"
+#include "target-helpers/wrap_screen.h"
+#include "sw/null/null_sw_winsys.h"
+
+#ifdef GALLIUM_SOFTPIPE
+#include "softpipe/sp_public.h"
+#endif
+
+#ifdef GALLIUM_LLVMPIPE
+#include "llvmpipe/lp_public.h"
+#endif
+
+/* Haven't figured out a decent way to build the helper code yet -
+ * #include it here temporarily.
+ */
+#include "sw/sw_public.h"
+#include "sw/sw.c"
+
+#include "state_tracker/graw.h"
+
+#include <stdio.h>
+
+
+struct pipe_screen *
+graw_init( void )
+{
+   const char *default_driver;
+   const char *driver;
+   struct pipe_screen *screen = NULL;
+   struct sw_winsys *winsys = NULL;
+
+   /* Create the underlying winsys, which performs presents to Xlib
+    * drawables:
+    */
+   winsys = null_sw_create();
+   if (winsys == NULL)
+      return NULL;
+
+#if defined(GALLIUM_LLVMPIPE)
+   default_driver = "llvmpipe";
+#elif defined(GALLIUM_SOFTPIPE)
+   default_driver = "softpipe";
+#else
+   default_driver = "";
+#endif
+
+   driver = debug_get_option("GALLIUM_DRIVER", default_driver);
+
+#if defined(GALLIUM_LLVMPIPE)
+   if (screen == NULL && strcmp(driver, "llvmpipe") == 0)
+      screen = llvmpipe_create_screen( winsys );
+#endif
+
+#if defined(GALLIUM_SOFTPIPE)
+   if (screen == NULL)
+      screen = softpipe_create_screen( winsys );
+#endif
+
+   /* Inject any wrapping layers we want to here:
+    */
+   return gallium_wrap_screen( screen );
+}
+
+
+void *
+graw_create_window( int x,
+                    int y,
+                    unsigned width,
+                    unsigned height,
+                    enum pipe_format format )
+{
+   static int dummy;
+   return &dummy;
+}
+
+
+void
+graw_destroy_window( void *window )
+{
+}
+