From: Jason Ekstrand <jason.ekstrand@intel.com>
Date: Thu, 14 May 2015 18:39:32 +0000 (-0700)
Subject: vk/meta: Add a better comment about the VS for blits
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=018a0c17410c27b9a1971876bb1449f3c36df62f;p=mesa.git

vk/meta: Add a better comment about the VS for blits
---

diff --git a/src/vulkan/meta.c b/src/vulkan/meta.c
index 5973013a5b8..e225da75b24 100644
--- a/src/vulkan/meta.c
+++ b/src/vulkan/meta.c
@@ -296,7 +296,9 @@ anv_device_init_meta_blit_state(struct anv_device *device)
    };
 
    /* We don't use a vertex shader for clearing, but instead build and pass
-    * the VUEs directly to the rasterization backend.
+    * the VUEs directly to the rasterization backend.  However, we do need
+    * to provide GLSL source for the vertex shader so that the compiler
+    * does not dead-code our inputs.
     */
    static const char vs_source[] = GLSL(
       in vec2 a_pos;