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-rw-r--r--src/gallium/include/state_tracker/swrast_screen_create.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/gallium/include/state_tracker/swrast_screen_create.h b/src/gallium/include/state_tracker/swrast_screen_create.h
new file mode 100644
index 0000000000..a08f83a325
--- /dev/null
+++ b/src/gallium/include/state_tracker/swrast_screen_create.h
@@ -0,0 +1,67 @@
+#include "pipe/p_compiler.h"
+#include "util/u_debug.h"
+#include "target-helpers/wrap_screen.h"
+
+struct sw_winsys;
+
+#ifdef GALLIUM_SOFTPIPE
+#include "softpipe/sp_public.h"
+#endif
+
+#ifdef GALLIUM_LLVMPIPE
+#include "llvmpipe/lp_public.h"
+#endif
+
+#ifdef GALLIUM_CELL
+#include "cell/ppu/cell_public.h"
+#endif
+
+/*
+ * Helper function to choose and instantiate one of the software rasterizers:
+ * cell, llvmpipe, softpipe.
+ *
+ * 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 INLINE struct pipe_screen *
+swrast_screen_create(struct sw_winsys *winsys)
+{
+ const char *default_driver;
+ const char *driver;
+ struct pipe_screen *screen = NULL;
+
+#if defined(GALLIUM_CELL)
+ default_driver = "cell";
+#elif 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_CELL)
+ if (screen == NULL && strcmp(driver, "cell") == 0)
+ screen = cell_create_screen( winsys );
+#endif
+
+#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
+
+ return gallium_wrap_screen( screen );
+}
+