ZoomIt smooth image zooming (#42200)

Added smooth image option that results in GDI+ image smoothing for
static zoom and Magnifier API image smoothing for live zoom.

---------

Co-authored-by: Mark Russinovich <markruss@ntdev.microsoft.com>
Co-authored-by: Clint Rutkas <clint@rutkas.com>
Co-authored-by: Niels Laute <niels.laute@live.nl>

.github/actions/spell-check/expect.txt

@@ -856,6 +856,7 @@ linkid
 LINKOVERLAY
 LINQTo
 listview
+LIVEDRAW
 LIVEZOOM
 LLKH
 llkhf
@@ -1237,6 +1238,7 @@ PATPAINT
 pbc
 pbi
 PBlob
+pbrush
 pcb
 pcch
 pcelt

src/modules/ZoomIt/ZoomIt/ZoomIt.h

@@ -96,7 +96,10 @@ typedef struct {
 #define SHALLOW_DESTROY 2
 #define LIVE_DRAW_ZOOM   3
 
-#define PEN_COLOR_HIGHLIGHT(Pencolor)	(Pencolor >> 24) != 0xFF
+#define PEN_COLOR_HIGHLIGHT(Pencolor)	((Pencolor >> 24) != 0xFF)
+#define PEN_COLOR_BLUR(Pencolor)        ((Pencolor & 0x00FFFFFF) == COLOR_BLUR)
+
+#define CURSOR_SAVE_MARGIN  4
 
 
 typedef BOOL (__stdcall *type_pGetMonitorInfo)(
@@ -143,6 +146,13 @@ typedef BOOL(__stdcall *type_pMagSetWindowFilterList)(
     int   count,
     HWND* pHWND
 );
+typedef BOOL(__stdcall* type_pMagSetLensUseBitmapSmoothing)(
+    _In_ HWND, 
+    _In_ BOOL
+);
+typedef BOOL(__stdcall* type_MagSetFullscreenUseBitmapSmoothing)(
+    BOOL fUseBitmapSmoothing
+);
 typedef BOOL(__stdcall* type_pMagInitialize)(VOID);
 
 typedef BOOL(__stdcall *type_pGetPointerType)(

src/modules/ZoomIt/ZoomIt/ZoomIt.rc

@@ -2,13 +2,6 @@
 //
 #include "resource.h"
 
-// version.h and branding.h are different in the Sysinternals repository,
-// keep the includes as such, here.
-// From $(MSBuildThisFileDirectory)..\..\..\common\version
-#include "version.h"
-// From $(MSBuildThisFileDirectory)PowerToys
-#include "branding.h"
-
 #define APSTUDIO_READONLY_SYMBOLS
 /////////////////////////////////////////////////////////////////////////////
 //
@@ -75,8 +68,8 @@ APPICON                 ICON                    "appicon.ico"
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION FILE_VERSION
+ FILEVERSION 9,10,0,0
- PRODUCTVERSION PRODUCT_VERSION
+ PRODUCTVERSION 9,10,0,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -91,14 +84,14 @@ BEGIN
     BEGIN
         BLOCK "040904b0"
         BEGIN
-            VALUE "CompanyName", COMPANY_NAME
+            VALUE "CompanyName", "Microsoft Corporation"
-            VALUE "FileDescription", FILE_DESCRIPTION
+            VALUE "FileDescription", "Sysinternals Screen Magnifier"
-            VALUE "FileVersion", FILE_VERSION_STRING
+            VALUE "FileVersion", "9.10"
-            VALUE "InternalName", INTERNAL_NAME
+            VALUE "InternalName", "ZoomIt"
-            VALUE "LegalCopyright", COPYRIGHT_NOTE
+            VALUE "LegalCopyright", "Copyright (C) Microsoft Corporation. All rights reserved."
-            VALUE "OriginalFilename", ORIGINAL_FILENAME
+            VALUE "OriginalFilename", "PowerToys.ZoomIt.exe"
-            VALUE "ProductName", ZOOMIT_PRODUCT_NAME
+            VALUE "ProductName", "PowerToys Sysinternals ZoomIt"
-            VALUE "ProductVersion", PRODUCT_VERSION_STRING
+            VALUE "ProductVersion", "9.10"
         END
     END
     BLOCK "VarFileInfo"
@@ -122,7 +115,7 @@ BEGIN
     DEFPUSHBUTTON   "OK",IDOK,166,306,50,14
     PUSHBUTTON      "Cancel",IDCANCEL,223,306,50,14
     LTEXT           "ZoomIt v9.01",IDC_VERSION,42,7,73,10
-    LTEXT           "Copyright © 2006-2025 Mark Russinovich",IDC_COPYRIGHT,42,17,166,8
+    LTEXT           "Copyright <EFBFBD> 2006-2025 Mark Russinovich",IDC_COPYRIGHT,42,17,231,8
     CONTROL         "<a HREF=""https://www.sysinternals.com"">Sysinternals - www.sysinternals.com</a>",IDC_LINK,
                     "SysLink",WS_TABSTOP,42,26,150,9
     ICON            "APPICON",IDC_STATIC,12,9,20,20
@@ -149,7 +142,8 @@ BEGIN
     CONTROL         "",IDC_TIMER_POS7,"Button",BS_AUTORADIOBUTTON,63,108,10,10
     CONTROL         "",IDC_TIMER_POS8,"Button",BS_AUTORADIOBUTTON,79,108,10,10
     CONTROL         "",IDC_TIMER_POS9,"Button",BS_AUTORADIOBUTTON,97,108,10,10
-    CONTROL         "Show background bitmap:",IDC_CHECK_BACKGROUND_FILE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,3,122,99,10,WS_EX_RIGHT
+    CONTROL         "Show background bitmap:",IDC_CHECK_BACKGROUND_FILE,
+                    "Button",BS_AUTOCHECKBOX | WS_TABSTOP,3,122,99,10,WS_EX_RIGHT
     CONTROL         "Use faded desktop as background",IDC_STATIC_DESKTOP_BACKGROUND,
                     "Button",BS_AUTORADIOBUTTON | WS_GROUP | WS_TABSTOP,46,135,125,10
     CONTROL         "Use image file as background",IDC_STATIC_BACKGROUND_FILE,
@@ -165,23 +159,25 @@ BEGIN
     CONTROL         "",IDC_STATIC,"Static",SS_BLACKFRAME | SS_SUNKEN,7,196,193,1,WS_EX_CLIENTEDGE
 END
 
-ZOOM DIALOGEX 0, 0, 260, 158
+ZOOM DIALOGEX 0, 0, 260, 170
 STYLE DS_SETFONT | DS_FIXEDSYS | DS_CONTROL | WS_CHILD | WS_CLIPSIBLINGS | WS_SYSMENU
 FONT 8, "MS Shell Dlg", 400, 0, 0x1
 BEGIN
     CONTROL         "",IDC_HOTKEY,"msctls_hotkey32",WS_BORDER | WS_TABSTOP,59,57,80,12
     LTEXT           "After toggling ZoomIt you can zoom in with the mouse wheel or up and down arrow keys. Exit zoom mode with Escape or by pressing the right mouse button.",IDC_STATIC,7,6,246,26
     LTEXT           "Zoom Toggle:",IDC_STATIC,7,59,51,8
-    CONTROL         "",IDC_ZOOM_SLIDER,"msctls_trackbar32",TBS_AUTOTICKS | TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,53,104,150,15,WS_EX_TRANSPARENT
+    CONTROL         "",IDC_ZOOM_SLIDER,"msctls_trackbar32",TBS_AUTOTICKS | TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,53,118,150,15,WS_EX_TRANSPARENT
-    LTEXT           "Specify the initial level of magnification when zooming in:",IDC_STATIC,7,91,215,10
+    LTEXT           "Specify the initial level of magnification when zooming in:",IDC_STATIC,7,105,215,10
-    LTEXT           "1.25",IDC_STATIC,52,122,16,8
+    LTEXT           "1.25",IDC_STATIC,52,136,16,8
-    LTEXT           "1.5",IDC_STATIC,82,122,12,8
+    LTEXT           "1.5",IDC_STATIC,82,136,12,8
-    LTEXT           "1.75",IDC_STATIC,108,122,16,8
+    LTEXT           "1.75",IDC_STATIC,108,136,16,8
-    LTEXT           "2.0",IDC_STATIC,138,122,12,8
+    LTEXT           "2.0",IDC_STATIC,138,136,12,8
-    LTEXT           "3.0",IDC_STATIC,164,122,12,8
+    LTEXT           "3.0",IDC_STATIC,164,136,12,8
-    LTEXT           "4.0",IDC_STATIC,190,122,12,8
+    LTEXT           "4.0",IDC_STATIC,190,136,12,8
     CONTROL         "Animate zoom in and zoom out:",IDC_ANIMATE_ZOOM,"Button",BS_AUTOCHECKBOX | BS_LEFTTEXT | WS_TABSTOP,7,74,116,10
-    LTEXT           "Copy a zoomed screen with Ctrl+C or save it by typing Ctrl+S. Crop the copy or save region by entering Ctrl+Shift instead of Ctrl.",IDC_STATIC,7,34,246,17
+    CONTROL         "Smooth zoomed image:",IDC_SMOOTH_IMAGE,"Button",BS_AUTOCHECKBOX | BS_LEFTTEXT | WS_TABSTOP,7,88,116,10
+    LTEXT           "Copy a zoomed screen with Ctrl+C or save it by typing Ctrl+S. Crop the copy or save region by entering Ctrl+Shift instead of Ctrl.",IDC_STATIC,7,148,246,17
+    LTEXT           "Copy a zoomed screen with Ctrl+C or save it by typing Ctrl+S. Crop the copy or save region by entering Ctrl+Shift instead of Ctrl.",IDC_STATIC,6,34,246,18
 END
 
 DRAW DIALOGEX 0, 0, 260, 228
@@ -295,7 +291,8 @@ BEGIN
     LTEXT           "DemoType toggle:",IDC_STATIC,7,157,63,8
     PUSHBUTTON      "&...",IDC_DEMOTYPE_BROWSE,231,137,16,13
     CONTROL         "",IDC_DEMOTYPE_SPEED_SLIDER,"msctls_trackbar32",TBS_AUTOTICKS | TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,52,202,150,11,WS_EX_TRANSPARENT
-    CONTROL         "Drive input with typing:",IDC_DEMOTYPE_USER_DRIVEN,"Button",BS_AUTOCHECKBOX | BS_LEFTTEXT | WS_TABSTOP,7,173,88,10
+    CONTROL         "Drive input with typing:",IDC_DEMOTYPE_USER_DRIVEN,
+                    "Button",BS_AUTOCHECKBOX | BS_LEFTTEXT | WS_TABSTOP,7,173,88,10
     LTEXT           "DemoType typing speed:",IDC_STATIC,7,189,215,10
     LTEXT           "Slow",IDC_DEMOTYPE_STATIC1,51,213,18,8
     LTEXT           "Fast",IDC_DEMOTYPE_STATIC2,186,213,17,8

src/modules/ZoomIt/ZoomIt/ZoomItSettings.h

@@ -14,6 +14,7 @@ DWORD   g_SnipToggleKey = ((HOTKEYF_CONTROL) << 8) | '6';
 DWORD	g_ShowExpiredTime = 1;
 DWORD	g_SliderZoomLevel = 3;
 BOOLEAN g_AnimateZoom = TRUE;
+BOOLEAN g_SmoothImage = TRUE;
 DWORD	g_PenColor = COLOR_RED;
 DWORD	g_BreakPenColor = COLOR_RED;
 DWORD   g_RootPenWidth = PEN_WIDTH;
@@ -72,6 +73,7 @@ REG_SETTING RegSettings[] = {
     { L"ShowTrayIcon", SETTING_TYPE_BOOLEAN, 0, &g_ShowTrayIcon, static_cast<DOUBLE>(g_ShowTrayIcon) },
     // NOTE: AnimateZoom is misspelled, but since it is a user setting stored in the registry we must continue to misspell it.
     { L"AnimnateZoom", SETTING_TYPE_BOOLEAN, 0, &g_AnimateZoom, static_cast<DOUBLE>(g_AnimateZoom) },
+    { L"SmoothImage", SETTING_TYPE_BOOLEAN, 0, &g_SmoothImage, static_cast<DOUBLE>(g_SmoothImage) },
     { L"TelescopeZoomOut", SETTING_TYPE_BOOLEAN, 0, &g_TelescopeZoomOut, static_cast<DOUBLE>(g_TelescopeZoomOut) },
     { L"SnapToGrid", SETTING_TYPE_BOOLEAN, 0, &g_SnapToGrid, static_cast<DOUBLE>(g_SnapToGrid) },
     { L"ZoominSliderLevel", SETTING_TYPE_DWORD, 0, &g_SliderZoomLevel, static_cast<DOUBLE>(g_SliderZoomLevel) },

src/modules/ZoomIt/ZoomIt/Zoomit.cpp

@@ -170,6 +170,8 @@ type_pMagSetFullscreenTransform pMagSetFullscreenTransform;
 type_pMagSetInputTransform	pMagSetInputTransform;
 type_pMagShowSystemCursor	pMagShowSystemCursor;
 type_pMagSetWindowFilterList pMagSetWindowFilterList;
+type_MagSetFullscreenUseBitmapSmoothing pMagSetFullscreenUseBitmapSmoothing;
+type_pMagSetLensUseBitmapSmoothing pMagSetLensUseBitmapSmoothing;
 type_pMagInitialize			pMagInitialize;
 type_pDwmIsCompositionEnabled	pDwmIsCompositionEnabled;
 type_pGetPointerType		pGetPointerType;
@@ -1099,6 +1101,8 @@ void DrawHighlightedShape( DWORD Shape, HDC hdcScreenCompat, Gdiplus::Brush *pBr
     // Create a new bitmap that's the size of the area covered by the line + 2 * g_PenWidth
     Gdiplus::Rect lineBounds(min(x1, x2), min(y1, y2), abs(x2 - x1), abs(y2 - y1));
 
+    OutputDebug(L"DrawHighlightedShape\n");
+
     // Expand for line drawing
     if (Shape == DRAW_LINE)
         lineBounds.Inflate(static_cast<int>(g_PenWidth / 2), static_cast<int>(g_PenWidth / 2));
@@ -1284,7 +1288,12 @@ void ScaleImage( HDC hdcDst, float xDst, float yDst, float wDst, float hDst,
     {
         Gdiplus::Bitmap		srcBitmap( bmSrc, NULL );
 
+        // Use high quality interpolation when smooth image is enabled
+        if (g_SmoothImage) {
+            dstGraphics.SetInterpolationMode( Gdiplus::InterpolationModeHighQuality );
+        } else {
             dstGraphics.SetInterpolationMode( Gdiplus::InterpolationModeLowQuality );
+        }
         dstGraphics.SetPixelOffsetMode( Gdiplus::PixelOffsetModeHalf );
 
         dstGraphics.DrawImage( &srcBitmap, Gdiplus::RectF(xDst,yDst,wDst,hDst), xSrc, ySrc, wSrc, hSrc, Gdiplus::UnitPixel );
@@ -2071,6 +2080,8 @@ INT_PTR CALLBACK OptionsProc( HWND hDlg, UINT message,
             IsAutostartConfigured() ? BST_CHECKED: BST_UNCHECKED );
         CheckDlgButton( g_OptionsTabs[ZOOM_PAGE].hPage, IDC_ANIMATE_ZOOM, 
             g_AnimateZoom ? BST_CHECKED: BST_UNCHECKED );
+        CheckDlgButton( g_OptionsTabs[ZOOM_PAGE].hPage, IDC_SMOOTH_IMAGE, 
+            g_SmoothImage ? BST_CHECKED: BST_UNCHECKED );
 
         SendMessage( GetDlgItem(g_OptionsTabs[ZOOM_PAGE].hPage, IDC_ZOOM_SLIDER), TBM_SETRANGE, false, MAKELONG(0,_countof(g_ZoomLevels)-1) );
         SendMessage( GetDlgItem(g_OptionsTabs[ZOOM_PAGE].hPage, IDC_ZOOM_SLIDER), TBM_SETPOS, true, g_SliderZoomLevel );
@@ -2210,6 +2221,7 @@ INT_PTR CALLBACK OptionsProc( HWND hDlg, UINT message,
             }
             g_ShowTrayIcon = IsDlgButtonChecked( hDlg, IDC_SHOW_TRAY_ICON ) == BST_CHECKED;
             g_AnimateZoom = IsDlgButtonChecked( g_OptionsTabs[ZOOM_PAGE].hPage, IDC_ANIMATE_ZOOM ) == BST_CHECKED;
+            g_SmoothImage = IsDlgButtonChecked( g_OptionsTabs[ZOOM_PAGE].hPage, IDC_SMOOTH_IMAGE ) == BST_CHECKED;
             g_DemoTypeUserDriven = IsDlgButtonChecked( g_OptionsTabs[DEMOTYPE_PAGE].hPage, IDC_DEMOTYPE_USER_DRIVEN ) == BST_CHECKED;
 
             newToggleKey = static_cast<DWORD>(SendMessage( GetDlgItem( g_OptionsTabs[ZOOM_PAGE].hPage, IDC_HOTKEY), HKM_GETHOTKEY, 0, 0 ));
@@ -2723,7 +2735,6 @@ VOID DrawShape( DWORD Shape, HDC hDc, RECT *Rect, bool UseGdiPlus = false )
     bool	isBlur = false;
 
     Gdiplus::Graphics	dstGraphics(hDc);
-
 	if( ( GetWindowLong( g_hWndMain, GWL_EXSTYLE ) & WS_EX_LAYERED ) == 0 )
 	{
 		dstGraphics.SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);
@@ -2746,6 +2757,7 @@ VOID DrawShape( DWORD Shape, HDC hDc, RECT *Rect, bool UseGdiPlus = false )
             InflateRect(Rect, g_PenWidth / 2, g_PenWidth / 2);
         isBlur = true;
     }
+    OutputDebug(L"Draw shape: highlight: %d pbrush: %d\n", PEN_COLOR_HIGHLIGHT(g_PenColor), pBrush != NULL);
 
     switch (Shape) {
     case DRAW_RECTANGLE:
@@ -2920,7 +2932,7 @@ void InvalidateCursorMoveArea( HWND hWnd, float zoomLevel, int width, int height
 {
     int		x, y;
     RECT	rc;
-    int		invWidth = g_PenWidth;
+    int		invWidth = g_PenWidth + CURSOR_SAVE_MARGIN;
 
     if( DrawHighlightedCursor( zoomLevel, width, height ) ) {
         
@@ -2945,7 +2957,7 @@ void InvalidateCursorMoveArea( HWND hWnd, float zoomLevel, int width, int height
 void SaveCursorArea( HDC hDcTarget, HDC hDcSource, POINT pt )
 {
     OutputDebug( L"SaveCursorArea\n");
-    int penWidth = g_PenWidth + 2;
+    int penWidth = g_PenWidth + CURSOR_SAVE_MARGIN;
     BitBlt( hDcTarget, 0, 0, penWidth +CURSOR_ARM_LENGTH*2, penWidth +CURSOR_ARM_LENGTH*2,
         hDcSource, static_cast<INT> (pt.x- penWidth /2)-CURSOR_ARM_LENGTH,
         static_cast<INT>(pt.y- penWidth /2)-CURSOR_ARM_LENGTH, SRCCOPY|CAPTUREBLT );
@@ -2959,7 +2971,7 @@ void SaveCursorArea( HDC hDcTarget, HDC hDcSource, POINT pt )
 void RestoreCursorArea( HDC hDcTarget, HDC hDcSource, POINT pt )
 {
     OutputDebug( L"RestoreCursorArea\n");
-    int penWidth = g_PenWidth + 2;
+    int penWidth = g_PenWidth + CURSOR_SAVE_MARGIN;
     BitBlt( hDcTarget, static_cast<INT>(pt.x- penWidth /2)-CURSOR_ARM_LENGTH,
         static_cast<INT>(pt.y- penWidth /2)-CURSOR_ARM_LENGTH, penWidth +CURSOR_ARM_LENGTH*2,
         penWidth + CURSOR_ARM_LENGTH*2, hDcSource, 0, 0, SRCCOPY|CAPTUREBLT );
@@ -4178,6 +4190,11 @@ LRESULT APIENTRY MainWndProc(
                     }
 #endif
                 }
+                OutputDebug(L"LIVEDRAW SMOOTHING: %d\n", g_SmoothImage);
+                if (!pMagSetLensUseBitmapSmoothing(g_hWndLiveZoomMag, g_SmoothImage))
+                {
+                    OutputDebug(L"MagSetLensUseBitmapSmoothing failed: %d\n", GetLastError());
+                }
 
                 if ( g_RecordToggle )
                 {
@@ -5296,6 +5313,8 @@ LRESULT APIENTRY MainWndProc(
 
             if( g_Drawing ) {
 
+                OutputDebug(L"Mousemove: Drawing\n");
+
                 POINT currentPt;
 
                 // Are we in pen mode on a tablet?
@@ -5334,7 +5353,15 @@ LRESULT APIENTRY MainWndProc(
                         }
                         else
                         {
-                            DrawShape( g_DrawingShape, hdcScreenCompat, &g_rcRectangle );
+                            if (PEN_COLOR_HIGHLIGHT(g_PenColor))
+                            {
+                                // copy original bitmap to screen bitmap to erase previous highlight
+                                BitBlt(hdcScreenCompat, 0, 0, bmp.bmWidth, bmp.bmHeight, drawUndoList->hDc, 0, 0, SRCCOPY | CAPTUREBLT);
+                            }
+                            else
+                            {
+                                DrawShape(g_DrawingShape, hdcScreenCompat, &g_rcRectangle, PEN_COLOR_HIGHLIGHT(g_PenColor));
+                            }
                         }
                     }
 
@@ -5380,7 +5407,7 @@ LRESULT APIENTRY MainWndProc(
                         g_rcRectangle.top != g_rcRectangle.bottom) {
 
                         // Draw the new target rectangle. 
-                        DrawShape(g_DrawingShape, hdcScreenCompat, &g_rcRectangle);
+                        DrawShape(g_DrawingShape, hdcScreenCompat, &g_rcRectangle, PEN_COLOR_HIGHLIGHT(g_PenColor));
                         OutputDebug(L"SHAPE: (%d, %d) - (%d, %d)\n", g_rcRectangle.left, g_rcRectangle.top, 
                             g_rcRectangle.right, g_rcRectangle.bottom);
                     }
@@ -5418,9 +5445,6 @@ LRESULT APIENTRY MainWndProc(
                         Gdiplus::BitmapData* lineData = LockGdiPlusBitmap(lineBitmap);
                         BYTE* pPixels = static_cast<BYTE*>(lineData->Scan0);
 
-                        // Copy the contents of the screen bitmap to the temporary bitmap
-                        GetOldestUndo(drawUndoList);
-
                         // Create a GDI bitmap that's the size of the lineBounds rectangle
                         Gdiplus::Bitmap *blurBitmap = CreateGdiplusBitmap( hdcScreenCompat, // oldestUndo->hDc, 
                                             lineBounds.X, lineBounds.Y, lineBounds.Width, lineBounds.Height);
@@ -5445,6 +5469,8 @@ LRESULT APIENTRY MainWndProc(
                     } 
                     else if(PEN_COLOR_HIGHLIGHT(g_PenColor)) { 
 
+                        OutputDebug(L"HIGHLIGHT\n");
+
                         // This is a highlighting pen color
                         Gdiplus::Rect lineBounds = GetLineBounds(prevPt, currentPt, g_PenWidth);
                         Gdiplus::Bitmap* lineBitmap = DrawBitmapLine(lineBounds, prevPt, currentPt, &pen);
@@ -5784,7 +5810,10 @@ LRESULT APIENTRY MainWndProc(
             if( !g_DrawingShape ) {
 
                 // If the point has changed, draw a line to it
-                if (prevPt.x != LOWORD(lParam) || prevPt.y != HIWORD(lParam)) {
+                if (!PEN_COLOR_HIGHLIGHT(g_PenColor))
+                {
+                    if (prevPt.x != LOWORD(lParam) || prevPt.y != HIWORD(lParam))
+                    {
                         Gdiplus::Graphics dstGraphics(hdcScreenCompat);
                         if ((GetWindowLong(g_hWndMain, GWL_EXSTYLE) & WS_EX_LAYERED) == 0)
                         {
@@ -5798,12 +5827,13 @@ LRESULT APIENTRY MainWndProc(
                         dstGraphics.DrawPath(&pen, &path);
                     }
                     // Draw a dot at the current point, if the point hasn't changed
-                else {
+                    else
+                    {
                         MoveToEx(hdcScreenCompat, prevPt.x, prevPt.y, NULL);
                         LineTo(hdcScreenCompat, LOWORD(lParam), HIWORD(lParam));
                         InvalidateRect(hWnd, NULL, FALSE);
                     }
-
+                }
                 prevPt.x = LOWORD( lParam );
                 prevPt.y = HIWORD( lParam );
 
@@ -5818,8 +5848,11 @@ LRESULT APIENTRY MainWndProc(
                         g_rcRectangle.left != g_rcRectangle.right ) {
 
                 // erase previous
+                if (!PEN_COLOR_HIGHLIGHT(g_PenColor))
+                {
                     SetROP2(hdcScreenCompat, R2_NOTXORPEN);
                     DrawShape(g_DrawingShape, hdcScreenCompat, &g_rcRectangle);
+                }
 
                 // Draw the final shape
                 HBRUSH hBrush = static_cast<HBRUSH>(GetStockObject( NULL_BRUSH ));
@@ -6185,8 +6218,14 @@ LRESULT APIENTRY MainWndProc(
             SetStretchBltMode( hInterimSaveDc, HALFTONE );
             SetStretchBltMode( hSaveDc, HALFTONE );
 #else
+            // Use HALFTONE for better quality when smooth image is enabled
+            if (g_SmoothImage) {
+                SetStretchBltMode( hInterimSaveDc, HALFTONE );
+                SetStretchBltMode( hSaveDc, HALFTONE );
+            } else {
                 SetStretchBltMode( hInterimSaveDc, COLORONCOLOR );
                 SetStretchBltMode( hSaveDc, COLORONCOLOR );
+            }
 #endif
             StretchBlt( hInterimSaveDc,
                         0, 0,
@@ -6309,7 +6348,12 @@ LRESULT APIENTRY MainWndProc(
 #if SCALE_HALFTONE
             SetStretchBltMode( hSaveDc, HALFTONE );
 #else
+            // Use HALFTONE for better quality when smooth image is enabled
+            if (g_SmoothImage) {
+                SetStretchBltMode( hSaveDc, HALFTONE );
+            } else {
                 SetStretchBltMode( hSaveDc, COLORONCOLOR );
+            }
 #endif
 			StretchBlt( hSaveDc,
                         0, 0,
@@ -6646,8 +6690,8 @@ LRESULT APIENTRY MainWndProc(
                             (float)x, (float)y, 
                             width/zoomLevel, height/zoomLevel ); 
             } else {
-                // do a fast, less accurate render
+                // do a fast, less accurate render (but use smooth if enabled)
-                SetStretchBltMode( hDc, HALFTONE );
+                SetStretchBltMode( hDc, g_SmoothImage ? HALFTONE : COLORONCOLOR );
                 StretchBlt( ps.hdc, 
                         0, 0, 
                         bmp.bmWidth, bmp.bmHeight, 
@@ -6660,7 +6704,12 @@ LRESULT APIENTRY MainWndProc(
 #if SCALE_HALFTONE
             SetStretchBltMode( hDc, zoomLevel == zoomTelescopeTarget ? HALFTONE : COLORONCOLOR );
 #else
+            // Use HALFTONE for better quality when smooth image is enabled
+            if (g_SmoothImage) {
+                SetStretchBltMode( hDc, HALFTONE );
+            } else {
                 SetStretchBltMode( hDc, COLORONCOLOR );
+            }
 #endif
             StretchBlt( ps.hdc, 
                     0, 0, 
@@ -6683,7 +6732,7 @@ LRESULT APIENTRY MainWndProc(
 
                 BITMAP local_bmp;
                 GetObject(g_hBackgroundBmp, sizeof(local_bmp), &local_bmp);
-                SetStretchBltMode( hdcScreenCompat, HALFTONE );
+                SetStretchBltMode( hdcScreenCompat, g_SmoothImage ? HALFTONE : COLORONCOLOR );
                 if( g_BreakBackgroundStretch ) {
                     StretchBlt( hdcScreenCompat, 0, 0, width, height,
                         g_hDcBackgroundFile, 0, 0, local_bmp.bmWidth, local_bmp.bmHeight, SRCCOPY|CAPTUREBLT  );
@@ -6842,7 +6891,6 @@ LRESULT CALLBACK LiveZoomWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM
                                         WS_CHILD | MS_SHOWMAGNIFIEDCURSOR | WS_VISIBLE,
                                         0, 0, 0, 0, hWnd, NULL, g_hInstance, NULL );
         }
-
         ShowWindow( hWnd, SW_SHOW );
         InvalidateRect( g_hWndLiveZoomMag, NULL, TRUE );
 
@@ -7555,6 +7603,10 @@ int APIENTRY wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance
                     "MagSetWindowTransform" );
     pMagSetFullscreenTransform = (type_pMagSetFullscreenTransform)GetProcAddress(LoadLibrarySafe(L"magnification.dll", DLL_LOAD_LOCATION_SYSTEM),
                     "MagSetFullscreenTransform");
+    pMagSetFullscreenUseBitmapSmoothing = (type_MagSetFullscreenUseBitmapSmoothing)GetProcAddress(LoadLibrarySafe(L"magnification.dll", DLL_LOAD_LOCATION_SYSTEM),
+                    "MagSetFullscreenUseBitmapSmoothing");
+    pMagSetLensUseBitmapSmoothing = (type_pMagSetLensUseBitmapSmoothing)GetProcAddress(LoadLibrarySafe(L"magnification.dll", DLL_LOAD_LOCATION_SYSTEM),
+                    "MagSetLensUseBitmapSmoothing");
     pMagSetInputTransform = (type_pMagSetInputTransform)GetProcAddress(LoadLibrarySafe(L"magnification.dll", DLL_LOAD_LOCATION_SYSTEM),
                     "MagSetInputTransform");
     pMagShowSystemCursor = (type_pMagShowSystemCursor)GetProcAddress(LoadLibrarySafe(L"magnification.dll", DLL_LOAD_LOCATION_SYSTEM),

src/modules/ZoomIt/ZoomIt/resource.h

@@ -95,6 +95,7 @@
 #define IDC_COPYRIGHT                   1075
 #define IDC_PEN_WIDTH                   1105
 #define IDC_TIMER                       1106
+#define IDC_SMOOTH_IMAGE				1107
 #define IDC_SAVE                        40002
 #define IDC_COPY                        40004
 #define IDC_RECORD                      40006
@@ -109,7 +110,7 @@
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        118
 #define _APS_NEXT_COMMAND_VALUE         40013
-#define _APS_NEXT_CONTROL_VALUE         1076
+#define _APS_NEXT_CONTROL_VALUE         1078
 #define _APS_NEXT_SYMED_VALUE           101
 #endif
 #endif

src/settings-ui/Settings.UI.Library/ZoomItProperties.cs

@@ -81,6 +81,8 @@ namespace Microsoft.PowerToys.Settings.UI.Library
         [JsonPropertyName("AnimnateZoom")]
         public BoolProperty AnimateZoom { get; set; }
 
+        public BoolProperty SmoothImage { get; set; }
+
         public IntProperty ZoominSliderLevel { get; set; }
 
         public IntProperty RecordScaling { get; set; }

src/settings-ui/Settings.UI/SettingsXAML/Views/ZoomItPage.xaml

@@ -54,6 +54,9 @@
                     <tkcontrols:SettingsCard Name="ZoomItToggleAnimateZoom" x:Uid="ZoomIt_Toggle_AnimateZoom">
                         <ToggleSwitch x:Uid="ToggleSwitch" IsOn="{x:Bind ViewModel.AnimateZoom, Mode=TwoWay}" />
                     </tkcontrols:SettingsCard>
+                    <tkcontrols:SettingsCard Name="ZoomItSmoothZoomedImage" x:Uid="ZoomIt_Toggle_SmoothZoomedImage">
+                        <ToggleSwitch x:Uid="ToggleSwitch" IsOn="{x:Bind ViewModel.SmoothImage, Mode=TwoWay}" />
+                    </tkcontrols:SettingsCard>
                     <tkcontrols:SettingsCard Name="ZoomItSliderInitialMagnification" x:Uid="ZoomIt_Slider_InitialMagnification">
                         <Slider
                             MinWidth="{StaticResource SettingActionControlMinWidth}"

src/settings-ui/Settings.UI/Strings/en-us/Resources.resw

@@ -4662,6 +4662,9 @@ Copy a zoomed screen with Ctrl+C or save it by typing Ctrl+S. Crop the copy or s
   <data name="ZoomIt_Toggle_AnimateZoom.Header" xml:space="preserve">
     <value>Animate zoom in and zoom out</value>
   </data>
+  <data name="ZoomIt_Toggle_SmoothZoomedImage.Header" xml:space="preserve">
+    <value>Smooth zoomed image</value>
+  </data>  
   <data name="ZoomIt_Slider_InitialMagnification.Header" xml:space="preserve">
     <value>Specify the initial level of magnification when zooming in</value>
   </data>

src/settings-ui/Settings.UI/ViewModels/ZoomItViewModel.cs

@@ -197,6 +197,20 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
             }
         }
 
+        public bool SmoothImage
+        {
+            get => _zoomItSettings.Properties.SmoothImage.Value;
+            set
+            {
+                if (_zoomItSettings.Properties.SmoothImage.Value != value)
+                {
+                    _zoomItSettings.Properties.SmoothImage.Value = value;
+                    OnPropertyChanged(nameof(SmoothImage));
+                    NotifySettingsChanged();
+                }
+            }
+        }
+
         public int ZoominSliderLevel
         {
             get => _zoomItSettings.Properties.ZoominSliderLevel.Value;