3 files changed, 21 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_strings.c b/src/gallium/auxiliary/tgsi/tgsi_strings.c
index 34dec4f8a3e..713631fbec4 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_strings.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_strings.c
@@ -122,6 +122,7 @@ const char *tgsi_property_names[TGSI_PROPERTY_COUNT] =
    "FS_DEPTH_LAYOUT",
    "VS_PROHIBIT_UCPS",
    "GS_INVOCATIONS",
+   "VS_POSITION_WINDOW_SPACE"
 };
 
 const char *tgsi_type_names[5] =
diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
index 2bf93ee6adb..bd0a3f79fbd 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
@@ -173,6 +173,7 @@ struct ureg_program
    unsigned char property_fs_coord_pixel_center; /* = TGSI_FS_COORD_PIXEL_CENTER_* */
    unsigned char property_fs_color0_writes_all_cbufs; /* = TGSI_FS_COLOR0_WRITES_ALL_CBUFS * */
    unsigned char property_fs_depth_layout; /* TGSI_FS_DEPTH_LAYOUT */
+   boolean property_vs_window_space_position; /* TGSI_VS_WINDOW_SPACE_POSITION */
 
    unsigned nr_addrs;
    unsigned nr_preds;
@@ -331,6 +332,13 @@ ureg_property_fs_depth_layout(struct ureg_program *ureg,
    ureg->property_fs_depth_layout = fs_depth_layout;
 }
 
+void
+ureg_property_vs_window_space_position(struct ureg_program *ureg,
+                                       boolean vs_window_space_position)
+{
+   ureg->property_vs_window_space_position = vs_window_space_position;
+}
+
 struct ureg_src
 ureg_DECL_fs_input_cyl_centroid(struct ureg_program *ureg,
                        unsigned semantic_name,
@@ -1508,6 +1516,14 @@ static void emit_decls( struct ureg_program *ureg )
                     ureg->property_fs_depth_layout);
    }
 
+   if (ureg->property_vs_window_space_position) {
+      assert(ureg->processor == TGSI_PROCESSOR_VERTEX);
+
+      emit_property(ureg,
+                    TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION,
+                    ureg->property_vs_window_space_position);
+   }
+
    if (ureg->processor == TGSI_PROCESSOR_VERTEX) {
       for (i = 0; i < UREG_MAX_INPUT; i++) {
          if (ureg->vs_inputs[i/32] & (1 << (i%32))) {
diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.h b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
index a0a50b7220e..28edea6cdae 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
@@ -184,6 +184,10 @@ void
 ureg_property_fs_depth_layout(struct ureg_program *ureg,
                               unsigned fs_depth_layout);
 
+void
+ureg_property_vs_window_space_position(struct ureg_program *ureg,
+                                       boolean vs_window_space_position);
+
 
 /***********************************************************************
  * Build shader declarations: