gallium/auxiliary: implement sw_probe_wrapped (v2)

Implement pipe_loader_sw_probe_wrapped which allows to use the wrapped
software renderer backend when using the pipe loader.

v2: - remove unneeded ifdef
    - use GALLIUM_PIPE_LOADER_WINSYS_LIBS
    - check for CALLOC_STRUCT
    thanks to Emil Velikov

Acked-by: Jose Fonseca <[email protected]>
Signed-off-by: David Heidelberg <[email protected]>

3 files changed, 36 insertions, 1 deletions

diff --git a/src/gallium/Automake.inc b/src/gallium/Automake.inc
index c43f735c3f3..9b312b113ea 100644
--- a/src/gallium/Automake.inc
+++ b/src/gallium/Automake.inc
@@ -58,7 +58,8 @@ GALLIUM_WINSYS_CFLAGS = \
 
 
 GALLIUM_PIPE_LOADER_WINSYS_LIBS = \
-	$(top_builddir)/src/gallium/winsys/sw/null/libws_null.la
+	$(top_builddir)/src/gallium/winsys/sw/null/libws_null.la \
+	$(top_builddir)/src/gallium/winsys/sw/wrapper/libwsw.la
 
 if HAVE_DRISW
 GALLIUM_PIPE_LOADER_WINSYS_LIBS += \
diff --git a/src/gallium/auxiliary/pipe-loader/pipe_loader.h b/src/gallium/auxiliary/pipe-loader/pipe_loader.h
index 6127a6ac3c0..9f43f17a6e2 100644
--- a/src/gallium/auxiliary/pipe-loader/pipe_loader.h
+++ b/src/gallium/auxiliary/pipe-loader/pipe_loader.h
@@ -166,6 +166,17 @@ pipe_loader_sw_probe_null(struct pipe_loader_device **devs);
 int
 pipe_loader_sw_probe(struct pipe_loader_device **devs, int ndev);
 
+/**
+ * Get a software device wrapped atop another device.
+ *
+ * This function is platform-specific.
+ *
+ * \sa pipe_loader_probe
+ */
+boolean
+pipe_loader_sw_probe_wrapped(struct pipe_loader_device **dev,
+                             struct pipe_screen *screen);
+
 #ifdef HAVE_PIPE_LOADER_DRM
 
 /**
diff --git a/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c b/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
index b1b1ca61f7b..3d332645231 100644
--- a/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
+++ b/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
@@ -31,6 +31,7 @@
 #include "util/u_dl.h"
 #include "sw/dri/dri_sw_winsys.h"
 #include "sw/null/null_sw_winsys.h"
+#include "sw/wrapper/wrapper_sw_winsys.h"
 #ifdef HAVE_PIPE_LOADER_XLIB
 /* Explicitly wrap the header to ease build without X11 headers */
 #include "sw/xlib/xlib_sw_winsys.h"
@@ -140,6 +141,28 @@ pipe_loader_sw_probe(struct pipe_loader_device **devs, int ndev)
    return i;
 }
 
+boolean
+pipe_loader_sw_probe_wrapped(struct pipe_loader_device **dev,
+                             struct pipe_screen *screen)
+{
+   struct pipe_loader_sw_device *sdev = CALLOC_STRUCT(pipe_loader_sw_device);
+
+   if (!sdev)
+      return false;
+
+   sdev->base.type = PIPE_LOADER_DEVICE_SOFTWARE;
+   sdev->base.driver_name = "swrast";
+   sdev->base.ops = &pipe_loader_sw_ops;
+   sdev->ws = wrapper_sw_winsys_wrap_pipe_screen(screen);
+
+   if (!sdev->ws) {
+      FREE(sdev);
+      return false;
+   }
+   *dev = &sdev->base;
+   return true;
+}
+
 static void
 pipe_loader_sw_release(struct pipe_loader_device **dev)
 {