From b215999d63d6e6b087e53e24a47b8b60520ec9e4 Mon Sep 17 00:00:00 2001
From: Oliver Wolff <oliver.wolff@qt.io>
Date: Wed, 11 Mar 2020 13:59:39 +0100
Subject: [PATCH] ANGLE: Fix severe performance regression

The changed buffer usage priority that was introduced in our ANGLE
update caused severe performance regressions for Qt applications.

Fixes: QTBUG-73835
Change-Id: I49839bb272cdeec0027264f2751b88bc149665ad
---
 src/3rdparty/angle/src/libANGLE/renderer/d3d/d3d11/Buffer11.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/3rdparty/angle/src/libANGLE/renderer/d3d/d3d11/Buffer11.h b/src/3rdparty/angle/src/libANGLE/renderer/d3d/d3d11/Buffer11.h
index ddbeeb90d2..f92a68454b 100644
--- a/src/3rdparty/angle/src/libANGLE/renderer/d3d/d3d11/Buffer11.h
+++ b/src/3rdparty/angle/src/libANGLE/renderer/d3d/d3d11/Buffer11.h
@@ -31,7 +31,6 @@ struct TranslatedAttribute;
 // The order of this enum governs priority of 'getLatestBufferStorage'.
 enum BufferUsage
 {
-    BUFFER_USAGE_SYSTEM_MEMORY,
     BUFFER_USAGE_STAGING,
     BUFFER_USAGE_VERTEX_OR_TRANSFORM_FEEDBACK,
     BUFFER_USAGE_INDEX,
@@ -40,6 +39,7 @@ enum BufferUsage
     BUFFER_USAGE_PIXEL_UNPACK,
     BUFFER_USAGE_PIXEL_PACK,
     BUFFER_USAGE_UNIFORM,
+    BUFFER_USAGE_SYSTEM_MEMORY,
     BUFFER_USAGE_EMULATED_INDEXED_VERTEX,
 
     BUFFER_USAGE_COUNT,
-- 
2.20.1.windows.1