Changeset 105264 in vbox for trunk/src/VBox/Devices/Graphics/DevVGA-SVGA3d-dx-dx11.cpp

Timestamp:

Jul 10, 2024 4:37:59 PM (7 months ago)

Author:

vboxsync

Message:

Devices/Graphics: suppress multisample flag for some formats. bugref:10717

File:

• trunk/src/VBox/Devices/Graphics/DevVGA-SVGA3d-dx-dx11.cpp (modified) (2 diffs)

trunk/src/VBox/Devices/Graphics/DevVGA-SVGA3d-dx-dx11.cpp

@@ -849 +849 @@
 }
 
+static int dxFormatAllowMultisample(DXGI_FORMAT dxgiFormat)
+{
+    /* Windows 11 guest does not allow multisample flag for a number of formats.
+     * D3D11 implementation on non-Windows hosts might return such flag.
+     */
+    switch (dxgiFormat)
+    {
+        case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
+        case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
+        case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
+        case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
+            return false;
+        default: break;
+    }
+    return true;
+}
+
 static int vmsvgaDXCheckFormatSupport(PVMSVGA3DSTATE pState, SVGA3dSurfaceFormat enmFormat, uint32_t *pu32DevCap)
 {
@@ -893 +910 @@
                 UINT NumQualityLevels;
                 hr = pDevice->CheckMultisampleQualityLevels(dxgiFormat, 2, &NumQualityLevels);
-                if (SUCCEEDED(hr) && NumQualityLevels != 0)
+                if (SUCCEEDED(hr) && NumQualityLevels != 0 && dxFormatAllowMultisample(dxgiFormat))
                     *pu32DevCap |= SVGA3D_DXFMT_MULTISAMPLE;
             }