[UI] Windows: Disable rounded corners

docs/building.md

@@ -13,7 +13,7 @@ drivers.
   * For Visual Studio 2022, MSBuild `v142` must be used due to a compiler bug; See [#2003](https://github.com/xenia-project/xenia/issues/2003).
 * [Python 3.6+](https://www.python.org/downloads/)
   * Ensure Python is in PATH.
-* Windows 10 SDK version 10.0.19041.0 (for Visual Studio 2019, this or any newer version)
+* Windows 11 SDK version 10.0.22000.0 (for Visual Studio 2019, this or any newer version)
 
 ```
 git clone https://github.com/xenia-project/xenia.git

premake5.lua

@@ -225,8 +225,9 @@ workspace("xenia")
       platforms({"Windows"})
       -- 10.0.15063.0: ID3D12GraphicsCommandList1::SetSamplePositions.
       -- 10.0.19041.0: D3D12_HEAP_FLAG_CREATE_NOT_ZEROED.
+      -- 10.0.22000.0: DWMWA_WINDOW_CORNER_PREFERENCE.
       filter("action:vs2017")
-        systemversion("10.0.19041.0")
+        systemversion("10.0.22000.0")
       filter("action:vs2019")
         systemversion("10.0")
       filter({})

src/xenia/ui/premake5.lua

@@ -21,5 +21,6 @@ project("xenia-ui")
 
   filter("platforms:Windows")
     links({
-      "DXGI",
+      "dwmapi",
+      "dxgi",
     })

src/xenia/ui/window_win.cc

@@ -23,8 +23,8 @@
 #include "xenia/ui/virtual_key.h"
 #include "xenia/ui/windowed_app_context_win.h"
 
-// For per-monitor DPI awareness v1.
 #include <ShellScalingApi.h>
+#include <dwmapi.h>
 
 namespace xe {
 namespace ui {
@@ -182,6 +182,14 @@ bool Win32Window::OpenImpl() {
     }
   }
 
+  // Disable rounded corners starting with Windows 11 (or silently receive and
+  // ignore E_INVALIDARG on Windows versions before 10.0.22000.0), primarily to
+  // preserve all pixels of the guest output.
+  DWM_WINDOW_CORNER_PREFERENCE window_corner_preference = DWMWCP_DONOTROUND;
+  DwmSetWindowAttribute(hwnd_, DWMWA_WINDOW_CORNER_PREFERENCE,
+                        &window_corner_preference,
+                        sizeof(window_corner_preference));
+
   // Disable flicks.
   ATOM atom = GlobalAddAtomW(L"MicrosoftTabletPenServiceProperty");
   const DWORD_PTR dwHwndTabletProperty =

xenia-build

@@ -920,7 +920,7 @@ class BuildShadersCommand(Command):
                     print('ERROR: could not find 32-bit Program Files')
                     return 1
                 windows_sdk_bin_path = os.path.join(
-                    program_files_path, 'Windows Kits/10/bin/10.0.19041.0/x64')
+                    program_files_path, 'Windows Kits/10/bin/10.0.22000.0/x64')
                 if not os.path.exists(windows_sdk_bin_path):
                     print('ERROR: could not find Windows 10 SDK binaries')
                     return 1