From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Sun, 14 Jun 2020 04:30:55 +0000 (-0400)
Subject: zink: block vkCmdBlitImage usage for multi sampled blits
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=582669f07e7d0ee4ef61d2e487f886be9e8e7890;p=mesa.git

zink: block vkCmdBlitImage usage for multi sampled blits

this is prohibited by spec

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5888>
---

diff --git a/src/gallium/drivers/zink/zink_blit.c b/src/gallium/drivers/zink/zink_blit.c
index 6dd3caaece1..2fdc7d582be 100644
--- a/src/gallium/drivers/zink/zink_blit.c
+++ b/src/gallium/drivers/zink/zink_blit.c
@@ -80,6 +80,10 @@ blit_native(struct zink_context *ctx, const struct pipe_blit_info *info)
        info->dst.format != info->src.format)
       return false;
 
+   /* vkCmdBlitImage must not be used for multisampled source or destination images. */
+   if (info->src.resource->nr_samples > 1 || info->dst.resource->nr_samples > 1)
+      return false;
+
    struct zink_resource *src = zink_resource(info->src.resource);
    struct zink_resource *dst = zink_resource(info->dst.resource);