Mesa (master): anv/formats: Advertise linear sampling on depth formats

[GitLab Mirror]

Module: Mesa
Branch: master
Commit: 56d005c21c1e679c62214e89497766d097da6f38
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=56d005c21c1e679c62214e89497766d097da6f38

Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Wed Feb 17 15:08:12 2021 -0600

anv/formats: Advertise linear sampling on depth formats

They've all supported it since either forever or Iron Lake which is
equivalent to forever for Vulkan.

>From Kenneth Graunke's GitLab review:

    "Linear blending of depth buffer data is usually fairly nonsense
    (something's 2 meters away?  another thing's 6 meters away?  let's
    just report 4 meters?)...but it's definitely a thing we can do, so
    we may as well let apps do it, and trust them not when it doesn't
    make sense."

Cc: mesa-stable at lists.freedesktop.org
Reviewed-by: Eric Anholt <eric at anholt.net>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9110>

---

 src/intel/vulkan/anv_formats.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/intel/vulkan/anv_formats.c b/src/intel/vulkan/anv_formats.c
index 71538e93aff..9d09e6bf016 100644
--- a/src/intel/vulkan/anv_formats.c
+++ b/src/intel/vulkan/anv_formats.c
@@ -571,6 +571,9 @@ anv_get_image_format_features(const struct gen_device_info *devinfo,
                VK_FORMAT_FEATURE_TRANSFER_SRC_BIT |
                VK_FORMAT_FEATURE_TRANSFER_DST_BIT;
 
+      if (aspects & VK_IMAGE_ASPECT_DEPTH_BIT)
+         flags |= VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT;
+
       if ((aspects & VK_IMAGE_ASPECT_DEPTH_BIT) && devinfo->gen >= 9)
          flags |= VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_MINMAX_BIT_EXT;