From b3c19ba5e86a540b3293599b30846db0612f060e Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Wed, 22 Apr 2020 21:01:19 +0200
Subject: [PATCH] [d3d11] Optimize ClearView for render target and depth-only
 views

We should use clearRenderTarget whenever we clear the entire view.
The Talos Principle uses ClearView to clear its render targets for
some reason, and we were hitting a slow path there.
---
 src/d3d11/d3d11_context.cpp | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/src/d3d11/d3d11_context.cpp b/src/d3d11/d3d11_context.cpp
index 69c9d9807..57fdb1575 100644
--- a/src/d3d11/d3d11_context.cpp
+++ b/src/d3d11/d3d11_context.cpp
@@ -1082,14 +1082,25 @@ namespace dxvk {
           cClearAspect  = clearAspect,
           cClearValue   = clearValue
         ] (DxvkContext* ctx) {
+          const VkImageUsageFlags rtUsage =
+            VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT |
+            VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
+
           VkOffset3D offset = { 0, 0, 0 };
           VkExtent3D extent = cImageView->mipLevelExtent(0);
 
-          ctx->clearImageView(
-            cImageView,
-            offset, extent,
-            cClearAspect,
-            cClearValue);
+          if (cImageView->info().usage & rtUsage) {
+            ctx->clearRenderTarget(
+              cImageView,
+              cClearAspect,
+              cClearValue);
+          } else {
+            ctx->clearImageView(
+              cImageView,
+              offset, extent,
+              cClearAspect,
+              cClearValue);
+          }
         });
       }
     }