intel: Enable HiZ for texture renderbuffers

When a depth texture is first attached to framebuffer, allocate a HiZ
miptree for it.

Reviewed-by: Eric Anholt <[email protected]>
Signed-off-by: Chad Versace <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_fbo.c b/src/mesa/drivers/dri/intel/intel_fbo.c
index 4930999cdb2..c96430d41bd 100644
--- a/src/mesa/drivers/dri/intel/intel_fbo.c
+++ b/src/mesa/drivers/dri/intel/intel_fbo.c
@@ -1047,6 +1047,13 @@ intel_renderbuffer_update_wrapper(struct intel_context *intel,
    } else {
       intel_miptree_reference(&irb->mt, mt);
       intel_renderbuffer_set_draw_offset(irb);
+
+      if (mt->hiz_mt == NULL &&
+	  intel->vtbl.is_hiz_depth_format(intel, rb->Format)) {
+	 intel_miptree_alloc_hiz(intel, mt);
+         if (!mt->hiz_mt)
+            return false;
+      }
    }
 
    return true;