Zebediah Figura : wined3d: Ignore DISCARD and NOOVERWRITE on buffers which are not GPU-accessible.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 734190a78c132c384ff2593a45884dfc40baae44
URL:    https://gitlab.winehq.org/wine/wine/-/commit/734190a78c132c384ff2593a45884df...

Author: Zebediah Figura 
Date:   Mon Dec 19 15:41:39 2022 -0600

wined3d: Ignore DISCARD and NOOVERWRITE on buffers which are not GPU-accessible.

This fixes a regression introduced by ebbcc10b0593948657b8e684c3a9be8ace1a5d25.
Prior to that commit, buffers which were not CPU-accessible would not have the
WINED3D_BUFFER_USE_BO flag set, and accordingly
buffer_resource_sub_resource_map() would simply return the SYSMEM location,
ignoring the DISCARD and NOOVERWRITE flags.

However, the "accelerated" path in wined3d_cs_map_upload_bo() only checks for
the DISCARD flag, assuming that it is only set for dynamic GPU-accessible
buffers, and would subsequently try to allocate non-mappable memory and then map
it.

This commit avoids the accelerated path for such buffers, once again matching
our old behaviour. According to [1], this also matches Windows: DISCARD on
SYSTEMMEM buffers is ignored on both AMD and NVidia, and NOOVERWRITE is ignored
on NVidia (but not AMD).

[1] https://www.winehq.org/mailman3/hyperkitty/list/[e-mail]/messag...

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53863

---

dlls/wined3d/device.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index c0646148c4a..b294af3c5fa 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -5167,9 +5167,9 @@ static unsigned int sanitise_map_flags(const struct wined3d_resource *resource,
     }
     else if (flags & (WINED3D_MAP_DISCARD | WINED3D_MAP_NOOVERWRITE))
     {
-        if (!(resource->usage & WINED3DUSAGE_DYNAMIC))
+        if (!(resource->access & WINED3D_RESOURCE_ACCESS_GPU) || !(resource->usage & WINED3DUSAGE_DYNAMIC))
         {
-            WARN("DISCARD or NOOVERWRITE map on non-dynamic buffer, ignoring.\n");
+            WARN("DISCARD or NOOVERWRITE map not on dynamic GPU-accessible buffer, ignoring.\n");
             return flags & (WINED3D_MAP_READ | WINED3D_MAP_WRITE);
         }
         if ((flags & (WINED3D_MAP_DISCARD | WINED3D_MAP_NOOVERWRITE))