Zebediah Figura : wined3d: Do not enforce GL map access for resources with WINED3D_RESOURCE_ACCESS_CPU.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ebbcc10b0593948657b8e684c3a9be8ace1a5d25
URL:    https://gitlab.winehq.org/wine/wine/-/commit/ebbcc10b0593948657b8e684c3a9be8...

Author: Zebediah Figura 
Date:   Mon Sep 19 13:21:32 2022 -0500

wined3d: Do not enforce GL map access for resources with WINED3D_RESOURCE_ACCESS_CPU.

d3d maps of such resources will map the CPU copy, and uploads and downloads use
glBufferSubData() and glGetBufferSubData() respectively. There is no need to map
the BO.

This improves performance of Indivisible on NVidia GPUs. The game uses a d3d9
MANAGED buffer for streaming vertex data, which results in poor performance on
NVidia when using GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT. With this change we
use neither.

This change should only affect managed resources, i.e. those with both CPU and
GPU access. We never create a BO for CPU-only resources.

---

dlls/wined3d/resource.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/dlls/wined3d/resource.c b/dlls/wined3d/resource.c
index 08edce3630c..c32c9580ae9 100644
--- a/dlls/wined3d/resource.c
+++ b/dlls/wined3d/resource.c
@@ -379,10 +379,13 @@ GLbitfield wined3d_resource_gl_storage_flags(const struct wined3d_resource *reso

if (resource->usage & WINED3DUSAGE_DYNAMIC)
         flags |= GL_CLIENT_STORAGE_BIT;
-    if (access & WINED3D_RESOURCE_ACCESS_MAP_W)
-        flags |= GL_MAP_WRITE_BIT;
-    if (access & WINED3D_RESOURCE_ACCESS_MAP_R)
-        flags |= GL_MAP_READ_BIT;
+    if (!(access & WINED3D_RESOURCE_ACCESS_CPU))
+    {
+        if (access & WINED3D_RESOURCE_ACCESS_MAP_W)
+            flags |= GL_MAP_WRITE_BIT;
+        if (access & WINED3D_RESOURCE_ACCESS_MAP_R)
+            flags |= GL_MAP_READ_BIT;
+    }

return flags;
 }