From: Nanley Chery <nanley.g.chery@intel.com>
Date: Tue, 10 Jan 2017 03:24:44 +0000 (-0800)
Subject: anv: Add a helper to determine sampling with HiZ
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3ac01ad2ac2aedee7e2515365d13c71a024878fb;p=mesa.git

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>
---

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,