Merge pull request #10341 from MrJul/lazy-pointerinfo

Lazy initialized Win32 pointer info buffers

src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs

@@ -793,6 +793,7 @@ namespace Avalonia.Win32
 
                     if (info.pointerType == PointerInputType.PT_TOUCH)
                     {
+                        s_historyTouchInfos ??= new POINTER_TOUCH_INFO[MaxPointerHistorySize];
                         if (GetPointerTouchInfoHistory(info.pointerId, ref historyCount, s_historyTouchInfos))
                         {
                             for (int i = historyCount - 1; i >= 1; i--)
@@ -804,6 +805,7 @@ namespace Avalonia.Win32
                     }
                     else if (info.pointerType == PointerInputType.PT_PEN)
                     {
+                        s_historyPenInfos ??= new POINTER_PEN_INFO[MaxPointerHistorySize];
                         if (GetPointerPenInfoHistory(info.pointerId, ref historyCount, s_historyPenInfos))
                         {
                             for (int i = historyCount - 1; i >= 1; i--)
@@ -815,6 +817,7 @@ namespace Avalonia.Win32
                     }
                     else
                     {
+                        s_historyInfos ??= new POINTER_INFO[MaxPointerHistorySize];
                         // Currently Windows does not return history info for mouse input, but we handle it just for case.
                         if (GetPointerInfoHistory(info.pointerId, ref historyCount, s_historyInfos))
                         {
@@ -837,6 +840,8 @@ namespace Avalonia.Win32
             // To understand some of this code, please check MS docs:
             // https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getmousemovepointsex#remarks
 
+            s_mouseHistoryInfos ??= new MOUSEMOVEPOINT[64];
+
             fixed (MOUSEMOVEPOINT* movePoints = s_mouseHistoryInfos)
             {
                 var movePointCopy = movePoint;

src/Windows/Avalonia.Win32/WindowImpl.cs

@@ -100,10 +100,10 @@ namespace Avalonia.Win32
 
         private const int MaxPointerHistorySize = 512;
         private static readonly PooledList<RawPointerPoint> s_intermediatePointsPooledList = new();
-        private static readonly POINTER_TOUCH_INFO[] s_historyTouchInfos = new POINTER_TOUCH_INFO[MaxPointerHistorySize];
-        private static readonly POINTER_PEN_INFO[] s_historyPenInfos = new POINTER_PEN_INFO[MaxPointerHistorySize];
-        private static readonly POINTER_INFO[] s_historyInfos = new POINTER_INFO[MaxPointerHistorySize];
-        private static readonly MOUSEMOVEPOINT[] s_mouseHistoryInfos = new MOUSEMOVEPOINT[64];
+        private static POINTER_TOUCH_INFO[]? s_historyTouchInfos;
+        private static POINTER_PEN_INFO[]? s_historyPenInfos;
+        private static POINTER_INFO[]? s_historyInfos;
+        private static MOUSEMOVEPOINT[]? s_mouseHistoryInfos;
 
         public WindowImpl()
         {