gallium: implement ARB_conservative_depth

This adds a new TGSI property to represent the GLSL layout qualifier in TGSI.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
index cd445a6daa6..ee013a5d687 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
@@ -161,6 +161,7 @@ struct ureg_program
    unsigned char property_fs_coord_origin; /* = TGSI_FS_COORD_ORIGIN_* */
    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 */
 
    unsigned nr_addrs;
    unsigned nr_preds;
@@ -304,6 +305,13 @@ ureg_property_fs_color0_writes_all_cbufs(struct ureg_program *ureg,
    ureg->property_fs_color0_writes_all_cbufs = fs_color0_writes_all_cbufs;
 }
 
+void
+ureg_property_fs_depth_layout(struct ureg_program *ureg,
+                              unsigned fs_depth_layout)
+{
+   ureg->property_fs_depth_layout = fs_depth_layout;
+}
+
 struct ureg_src
 ureg_DECL_fs_input_cyl_centroid(struct ureg_program *ureg,
                        unsigned semantic_name,
@@ -1388,6 +1396,14 @@ static void emit_decls( struct ureg_program *ureg )
                     ureg->property_fs_color0_writes_all_cbufs);
    }
 
+   if (ureg->property_fs_depth_layout) {
+      assert(ureg->processor == TGSI_PROCESSOR_FRAGMENT);
+
+      emit_property(ureg,
+                    TGSI_PROPERTY_FS_DEPTH_LAYOUT,
+                    ureg->property_fs_depth_layout);
+   }
+
    if (ureg->processor == TGSI_PROCESSOR_VERTEX) {
       for (i = 0; i < UREG_MAX_INPUT; i++) {
          if (ureg->vs_inputs[i/32] & (1 << (i%32))) {