From 3ac01ad2ac2aedee7e2515365d13c71a024878fb Mon Sep 17 00:00:00 2001
From: Nanley Chery <nanley.g.chery@intel.com>
Date: Mon, 9 Jan 2017 19:24:44 -0800
Subject: [PATCH] anv: Add a helper to determine sampling with HiZ

Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
---
 src/intel/vulkan/anv_private.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/intel/vulkan/anv_private.h b/src/intel/vulkan/anv_private.h
index aa1b6a81ccf..2342fcbfeb4 100644
--- a/src/intel/vulkan/anv_private.h
+++ b/src/intel/vulkan/anv_private.h
@@ -1609,6 +1609,13 @@ struct anv_image {
    struct anv_surface aux_surface;
 };
 
+/* Returns true if a HiZ-enabled depth buffer can be sampled from. */
+static inline bool
+anv_can_sample_with_hiz(uint8_t gen, uint32_t samples)
+{
+   return gen >= 8 && samples == 1;
+}
+
 void
 anv_gen8_hiz_op_resolve(struct anv_cmd_buffer *cmd_buffer,
                         const struct anv_image *image,