When computing the size of a widget always return values rounded up

laeubi · amartya4256 · commit bbb5abc8abe4 · 2025-09-26T07:11:59.000+02:00
When converting pixels to point there can be depending on the zoom level be a fractional result. Currently in all cases these result is converted into an integer using `Math.round()` that will make values `+/-0.5` resulting in small values to be round towards a smaller value. While it is maybe valid for a _location_, when using points to express a _dimension_ this is not okay as it will result in the reported (integer) value to be to small leading to errors when the SWT API is then used after performing additional computations maybe. This now makes the following adjustments: 1. Introduce a rounding mode that allows different ways of rounding and adds as a first step ROUND (the previous default) and UP (for always round towards the largest integer) 2. Adjust the `Control` class to decide what mode is best in what situation. See - #2381 - #2166
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDropTargetEffect.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDropTargetEffect.java
@@ -151,7 +151,7 @@ public void dragOver(DropTargetEvent event) {
 		int effect = checkEffect(event.feedback);
 		long handle = table.handle;
 		Point coordinates = new Point(event.x, event.y);
-		coordinates = Win32DPIUtils.pointToPixel(table.toControl(coordinates), DPIUtil.getZoomForAutoscaleProperty(table.nativeZoom)); // To Pixels
+		coordinates = Win32DPIUtils.pointToPixelAsLocation(table.toControl(coordinates), DPIUtil.getZoomForAutoscaleProperty(table.nativeZoom)); // To Pixels
 		LVHITTESTINFO pinfo = new LVHITTESTINFO();
 		pinfo.x = coordinates.x;
 		pinfo.y = coordinates.y;
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDropTargetEffect.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TreeDropTargetEffect.java
@@ -165,7 +165,7 @@ public void dragOver(DropTargetEvent event) {
 		int effect = checkEffect(event.feedback);
 		long handle = tree.handle;
 		Point coordinates = new Point(event.x, event.y);
-		coordinates = Win32DPIUtils.pointToPixel(tree.toControl(coordinates), DPIUtil.getZoomForAutoscaleProperty(tree.nativeZoom)); // To Pixels
+		coordinates = Win32DPIUtils.pointToPixelAsLocation(tree.toControl(coordinates), DPIUtil.getZoomForAutoscaleProperty(tree.nativeZoom)); // To Pixels
 		TVHITTESTINFO lpht = new TVHITTESTINFO ();
 		lpht.x = coordinates.x;
 		lpht.y = coordinates.y;
diff --git a/bundles/org.eclipse.swt/Eclipse SWT OLE Win32/win32/org/eclipse/swt/ole/win32/OleClientSite.java b/bundles/org.eclipse.swt/Eclipse SWT OLE Win32/win32/org/eclipse/swt/ole/win32/OleClientSite.java
@@ -987,7 +987,7 @@ private int OnInPlaceDeactivate() {
 	return COM.S_OK;
 }
 private int OnPosRectChange(long lprcPosRect) {
-	Point size = Win32DPIUtils.pointToPixel(getSize(), DPIUtil.getZoomForAutoscaleProperty(nativeZoom)); // To Pixels
+	Point size = Win32DPIUtils.pointToPixelAsSize(getSize(), DPIUtil.getZoomForAutoscaleProperty(nativeZoom)); // To Pixels
 	setExtent(size.x, size.y);
 	return COM.S_OK;
 }
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/graphics/Point.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/graphics/Point.java
@@ -16,6 +16,7 @@
 
 import java.io.*;
 
+import org.eclipse.swt.internal.*;
 import org.eclipse.swt.widgets.*;
 
 /**
@@ -138,14 +139,20 @@ public static sealed class OfFloat extends Point permits Point.WithMonitor {
 
 	private static final long serialVersionUID = -1862062276431597053L;
 
-	public float residualX, residualY;
+	private float residualX, residualY;
+	private RoundingMode roundingMode;
 
 	public OfFloat(int x, int y) {
 		super(x, y);
 	}
 
 	public OfFloat(float x, float y) {
-		super(Math.round(x), Math.round(y));
+		this(x, y, RoundingMode.ROUND);
+	}
+
+	public OfFloat(float x, float y, RoundingMode roundingMode) {
+		super(roundingMode.round(x), roundingMode.round(y));
+		this.roundingMode = roundingMode;
 		this.residualX = x - this.x;
 		this.residualY = y - this.y;
 	}
@@ -159,12 +166,12 @@ public float getY() {
 	}
 
 	public void setX(float x) {
-		this.x = Math.round(x);
+		this.x = roundingMode.round(x);
 		this.residualX = x - this.x;
 	}
 
 	public void setY(float y) {
-		this.y = Math.round(y);
+		this.y = roundingMode.round(y);
 		this.residualY = y - this.y;
 	}
 
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/graphics/RoundingMode.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/graphics/RoundingMode.java
@@ -0,0 +1,17 @@
+package org.eclipse.swt.graphics;
+/**
+* @noreference This class is not intended to be referenced by clients
+*/
+public enum RoundingMode {
+ ROUND, UP;
+
+public int round(float x) {
+	if (this == ROUND) {
+		return Math.round(x);
+	}
+	if (this == UP) {
+		return (int) Math.ceil(x);
+	}
+	return (int) x;
+}
+}
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/GC.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/GC.java
@@ -2036,7 +2036,7 @@ private class DrawPointOperation extends Operation {
 
 	@Override
 	void apply() {
-		Point scaleUpLocation = Win32DPIUtils.pointToPixel(location, getZoom());
+		Point scaleUpLocation = Win32DPIUtils.pointToPixelAsLocation(location, getZoom());
 		drawPointInPixels(scaleUpLocation.x, scaleUpLocation.y);
 	}
 }
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Region.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/graphics/Region.java
@@ -232,7 +232,7 @@ public boolean contains (Point pt) {
 	if (pt == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	return applyUsingAnyHandle(regionHandle -> {
 		int zoom = regionHandle.zoom();
-		Point p = Win32DPIUtils.pointToPixel(pt, zoom);
+		Point p = Win32DPIUtils.pointToPixelAsLocation(pt, zoom);
 		return containsInPixels(regionHandle.handle(), p.x, p.y);
 	});
 }
@@ -889,7 +889,7 @@ void intersect(long handle, int zoom) {
 
 	@Override
 	void translate(long handle, int zoom) {
-		Point pt = Win32DPIUtils.pointToPixel((Point) data, zoom);
+		Point pt = Win32DPIUtils.pointToPixelAsLocation((Point) data, zoom);
 		OS.OffsetRgn (handle, pt.x, pt.y);
 	}
 
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/internal/Win32DPIUtils.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/internal/Win32DPIUtils.java
@@ -114,12 +114,25 @@ public static float pixelToPoint(Drawable drawable, float size, int zoom) {
 	}
 
 	public static Point pixelToPoint(Point point, int zoom) {
+		//TODO actually all callers should explicitly state what mode the want!
+		return pixelToPoint(point, zoom, RoundingMode.ROUND);
+	}
+
+	public static Point pixelToPointAsSize(Point point, int zoom) {
+		return pixelToPoint(point, zoom, RoundingMode.UP);
+	}
+
+	public static Point pixelToPointAsLocation(Point point, int zoom) {
+		return pixelToPoint(point, zoom, RoundingMode.ROUND);
+	}
+
+	public static Point pixelToPoint(Point point, int zoom, RoundingMode mode) {
 		if (zoom == 100 || point == null) return point;
 		Point.OfFloat fPoint = Point.OfFloat.from(point);
 		float scaleFactor = DPIUtil.getScalingFactor(zoom);
 		float scaledX = fPoint.getX() / scaleFactor;
 		float scaledY = fPoint.getY() / scaleFactor;
-		return new Point.OfFloat(scaledX, scaledY);
+		return new Point.OfFloat(scaledX, scaledY, mode);
 	}
 
 	public static Point pixelToPoint(Drawable drawable, Point point, int zoom) {
@@ -219,26 +232,34 @@ public static float pointToPixel(Drawable drawable, float size, int zoom) {
 		return pointToPixel (size, zoom);
 	}
 
-	public static Point pointToPixel(Point point, int zoom) {
+	public static Point pointToPixel(Point point, int zoom, RoundingMode mode) {
 		if (zoom == 100 || point == null) return point;
 		Point.OfFloat fPoint = Point.OfFloat.from(point);
 		float scaleFactor = DPIUtil.getScalingFactor(zoom);
 		float scaledX = fPoint.getX() * scaleFactor;
 		float scaledY = fPoint.getY() * scaleFactor;
-		return new Point.OfFloat(scaledX, scaledY);
+		return new Point.OfFloat(scaledX, scaledY, mode);
+	}
+
+	public static Point pointToPixelAsSize(Point point, int zoom) {
+		return pointToPixel(point, zoom, RoundingMode.UP);
+	}
+
+	public static Point pointToPixelAsLocation(Point point, int zoom) {
+		return pointToPixel(point, zoom, RoundingMode.ROUND);
 	}
 
 	public static Point pointToPixel(Drawable drawable, Point point, int zoom) {
 		if (drawable != null && !drawable.isAutoScalable()) return point;
-		return pointToPixel (point, zoom);
+		return pointToPixel (point, zoom, RoundingMode.ROUND);
 	}
 
 	public static Rectangle pointToPixel(Rectangle rect, int zoom) {
 		if (zoom == 100 || rect == null) return rect;
 		if (rect instanceof Rectangle.OfFloat rectOfFloat) return pointToPixel(rectOfFloat, zoom);
 		Rectangle scaledRect = new Rectangle.OfFloat(0,0,0,0);
-		Point scaledTopLeft = pointToPixel (new Point(rect.x, rect.y), zoom);
-		Point scaledBottomRight = pointToPixel (new Point(rect.x + rect.width, rect.y + rect.height), zoom);
+		Point scaledTopLeft = pointToPixel (new Point(rect.x, rect.y), zoom, RoundingMode.ROUND);
+		Point scaledBottomRight = pointToPixel (new Point(rect.x + rect.width, rect.y + rect.height), zoom, RoundingMode.ROUND);
 
 		scaledRect.x = scaledTopLeft.x;
 		scaledRect.y = scaledTopLeft.y;
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java
@@ -219,7 +219,7 @@ Point computeSizeInPixels (int wHint, int hHint, boolean changed) {
 			changed |= (state & LAYOUT_CHANGED) != 0;
 			state &= ~LAYOUT_CHANGED;
 			int zoom = getZoom();
-			size = Win32DPIUtils.pointToPixel(layout.computeSize (this, DPIUtil.pixelToPoint(wHint, zoom), DPIUtil.pixelToPoint(hHint, zoom), changed), zoom);
+			size = Win32DPIUtils.pointToPixelAsSize(layout.computeSize (this, DPIUtil.pixelToPoint(wHint, zoom), DPIUtil.pixelToPoint(hHint, zoom), changed), zoom);
 		} else {
 			size = new Point (wHint, hHint);
 		}
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Control.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Control.java
@@ -620,7 +620,9 @@ public Point computeSize (int wHint, int hHint, boolean changed){
 	int zoom = getZoom();
 	wHint = (wHint != SWT.DEFAULT ? Win32DPIUtils.pointToPixel(wHint, zoom) : wHint);
 	hHint = (hHint != SWT.DEFAULT ? Win32DPIUtils.pointToPixel(hHint, zoom) : hHint);
-	return Win32DPIUtils.pixelToPoint(computeSizeInPixels(wHint, hHint, changed), zoom);
+	//We should never return a size that is to small, RoundingMode.UP ensures we at worst case report
+	//a size that is a bit too large by half a point
+	return Win32DPIUtils.pixelToPoint(computeSizeInPixels(wHint, hHint, changed), zoom, RoundingMode.UP);
 }
 
 Point computeSizeInPixels (int wHint, int hHint, boolean changed) {
@@ -1372,7 +1374,8 @@ public Object getLayoutData () {
  */
 public Point getLocation () {
 	checkWidget ();
-	return Win32DPIUtils.pixelToPoint(getLocationInPixels(), getZoom());
+	//For a location the closest point values is okay
+	return Win32DPIUtils.pixelToPoint(getLocationInPixels(), getZoom(), RoundingMode.ROUND);
 }
 
 Point getLocationInPixels () {
@@ -1528,7 +1531,7 @@ public Shell getShell () {
  */
 public Point getSize (){
 	checkWidget ();
-	return Win32DPIUtils.pixelToPoint(getSizeInPixels (), getZoom());
+	return Win32DPIUtils.pixelToPoint(getSizeInPixels (), getZoom(), RoundingMode.UP);
 }
 
 Point getSizeInPixels () {
@@ -3552,7 +3555,7 @@ void setLocationInPixels (int x, int y) {
 public void setLocation (Point location) {
 	checkWidget ();
 	if (location == null) error (SWT.ERROR_NULL_ARGUMENT);
-	location = Win32DPIUtils.pointToPixel(location, getZoom());
+	location = Win32DPIUtils.pointToPixelAsLocation(location, getZoom());
 	setLocationInPixels(location.x, location.y);
 }
 
@@ -3815,7 +3818,7 @@ void setSizeInPixels (int width, int height) {
 public void setSize (Point size) {
 	checkWidget ();
 	if (size == null) error (SWT.ERROR_NULL_ARGUMENT);
-	size = Win32DPIUtils.pointToPixel(size, getZoom());
+	size = Win32DPIUtils.pointToPixelAsSize(size, getZoom());
 	setSizeInPixels(size.x, size.y);
 }
 
@@ -4030,7 +4033,7 @@ public Point toControl (int x, int y) {
 	checkWidget ();
 	Point displayPointInPixels = getDisplay().translateToDisplayCoordinates(new Point(x, y));
 	final Point controlPointInPixels = toControlInPixels(displayPointInPixels.x, displayPointInPixels.y);
-	return Win32DPIUtils.pixelToPoint(controlPointInPixels, getZoom());
+	return Win32DPIUtils.pixelToPoint(controlPointInPixels, getZoom(), RoundingMode.ROUND);
 }
 
 Point toControlInPixels (int x, int y) {
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/CoolBar.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/CoolBar.java
@@ -809,7 +809,7 @@ public void setItemLayout (int [] itemOrder, int [] wrapIndices, Point [] sizes)
 	if (sizes == null) error (SWT.ERROR_NULL_ARGUMENT);
 	Point [] sizesInPoints = new Point [sizes.length];
 	for (int i = 0; i < sizes.length; i++) {
-		sizesInPoints[i] = Win32DPIUtils.pointToPixel(sizes[i], getZoom());
+		sizesInPoints[i] = Win32DPIUtils.pointToPixelAsSize(sizes[i], getZoom());
 	}
 	setItemLayoutInPixels (itemOrder, wrapIndices, sizesInPoints);
 }
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/CoolItem.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/CoolItem.java
@@ -464,7 +464,7 @@ void setPreferredSizeInPixels (int width, int height) {
 public void setPreferredSize (Point size) {
 	checkWidget ();
 	if (size == null) error(SWT.ERROR_NULL_ARGUMENT);
-	size = Win32DPIUtils.pointToPixel(size, getZoom());
+	size = Win32DPIUtils.pointToPixelAsSize(size, getZoom());
 	setPreferredSizeInPixels(size.x, size.y);
 }
 
@@ -592,7 +592,7 @@ void setSizeInPixels (int width, int height) {
 public void setSize (Point size) {
 	checkWidget ();
 	if (size == null) error(SWT.ERROR_NULL_ARGUMENT);
-	size = Win32DPIUtils.pointToPixel(size, getZoom());
+	size = Win32DPIUtils.pointToPixelAsSize(size, getZoom());
 	setSizeInPixels(size.x, size.y);
 }
 
@@ -695,7 +695,7 @@ void setMinimumSizeInPixels (int width, int height) {
 public void setMinimumSize (Point size) {
 	checkWidget ();
 	if (size == null) error (SWT.ERROR_NULL_ARGUMENT);
-	size = Win32DPIUtils.pointToPixel(size, getZoom());
+	size = Win32DPIUtils.pointToPixelAsSize(size, getZoom());
 	setMinimumSizeInPixels(size.x, size.y);
 }
 
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Display.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Display.java
@@ -3641,7 +3641,7 @@ public boolean post (Event event) {
 					int y = OS.GetSystemMetrics (OS.SM_YVIRTUALSCREEN);
 					int width = OS.GetSystemMetrics (OS.SM_CXVIRTUALSCREEN);
 					int height = OS.GetSystemMetrics (OS.SM_CYVIRTUALSCREEN);
-					Point loc = Win32DPIUtils.pointToPixel(event.getLocation(), getDeviceZoom());
+					Point loc = Win32DPIUtils.pointToPixelAsLocation(event.getLocation(), getDeviceZoom());
 					inputs.dx = ((loc.x - x) * 65535 + width - 2) / (width - 1);
 					inputs.dy = ((loc.y - y) * 65535 + height - 2) / (height - 1);
 				} else {
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/MenuItem.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/MenuItem.java
@@ -1437,7 +1437,7 @@ private Point calculateRenderedTextSize() {
 			// GC calculated height of 15px, scales down with adjusted zoom of 100% and returns 15pt -> should be 10pt
 			// this calculation is corrected by the following line
 			// This is the only place, where the GC needs to use the native zoom to do that, therefore it is fixed only here
-			points = Win32DPIUtils.pixelToPoint(Win32DPIUtils.pointToPixel(points, adjustedPrimaryMonitorZoom), primaryMonitorZoom);
+			points = Win32DPIUtils.pixelToPoint(Win32DPIUtils.pointToPixelAsSize(points, adjustedPrimaryMonitorZoom), primaryMonitorZoom);
 		}
 	}
 	return points;
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/MultiZoomCoordinateSystemMapper.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/MultiZoomCoordinateSystemMapper.java
@@ -51,11 +51,11 @@ public Point map(Control from, Control to, int x, int y) {
 					getPixelsFromPoint(to.getShell().getMonitor(), x, y));
 			mappedPointInPoints = Win32DPIUtils.pixelToPoint(mappedPointInpixels, to.getZoom());
 		} else if (to == null) {
-			Point mappedPointInpixels = display.mapInPixels(from, to, Win32DPIUtils.pointToPixel(new Point(x, y), from.getZoom()));
+			Point mappedPointInpixels = display.mapInPixels(from, to, Win32DPIUtils.pointToPixelAsLocation(new Point(x, y), from.getZoom()));
 			mappedPointInPoints = getPointFromPixels(from.getShell().getMonitor(), mappedPointInpixels.x,
 					mappedPointInpixels.y);
 		} else {
-			Point mappedPointInpixels = display.mapInPixels(from, to, Win32DPIUtils.pointToPixel(new Point(x, y), from.getZoom()));
+			Point mappedPointInpixels = display.mapInPixels(from, to, Win32DPIUtils.pointToPixelAsLocation(new Point(x, y), from.getZoom()));
 			mappedPointInPoints = Win32DPIUtils.pixelToPoint(mappedPointInpixels, to.getZoom());
 		}
 		return mappedPointInPoints;
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Shell.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Shell.java
@@ -1797,7 +1797,7 @@ public void setMaximumSize (int width, int height) {
 public void setMaximumSize (Point size) {
 	checkWidget ();
 	if (size == null) error (SWT.ERROR_NULL_ARGUMENT);
-	size = Win32DPIUtils.pointToPixel(size, getZoom());
+	size = Win32DPIUtils.pointToPixelAsSize(size, getZoom());
 	setMaximumSizeInPixels(size.x, size.y);
 }
 
@@ -1892,7 +1892,7 @@ void setMinimumSizeInPixels (int width, int height) {
 public void setMinimumSize (Point size) {
 	checkWidget ();
 	if (size == null) error (SWT.ERROR_NULL_ARGUMENT);
-	size = Win32DPIUtils.pointToPixel(size, getZoom());
+	size = Win32DPIUtils.pointToPixelAsSize(size, getZoom());
 	setMinimumSizeInPixels(size.x, size.y);
 }
 
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/SingleZoomCoordinateSystemMapper.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/SingleZoomCoordinateSystemMapper.java
@@ -41,7 +41,7 @@ private int getZoomLevelForMapping(Control from, Control to) {
 	@Override
 	public Point map(Control from, Control to, Point point) {
 		int zoom = getZoomLevelForMapping(from, to);
-		point = Win32DPIUtils.pointToPixel(point, zoom);
+		point = Win32DPIUtils.pointToPixelAsLocation(point, zoom);
 		return Win32DPIUtils.pixelToPoint(display.mapInPixels(from, to, point), zoom);
 	}
 
@@ -82,7 +82,7 @@ public Point translateFromDisplayCoordinates(Point point) {
 
 	@Override
 	public Point translateToDisplayCoordinates(Point point) {
-		return Win32DPIUtils.pointToPixel(point, DPIUtil.getDeviceZoom());
+		return Win32DPIUtils.pointToPixelAsLocation(point, DPIUtil.getDeviceZoom());
 	}
 
 	@Override
@@ -111,7 +111,7 @@ public void setCursorLocation(int x, int y) {
 	@Override
 	public Rectangle getContainingMonitorBoundsInPixels(Point point) {
 		int zoom = DPIUtil.getDeviceZoom();
-		point = Win32DPIUtils.pointToPixel(point, zoom);
+		point = Win32DPIUtils.pointToPixelAsLocation(point, zoom);
 		for (Monitor monitor : display.getMonitors()) {
 			Rectangle monitorBounds = Win32DPIUtils.pointToPixel(monitor.getBounds(), zoom);
 			if (monitorBounds.contains(point)) {
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/TabFolder.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/TabFolder.java
@@ -518,7 +518,7 @@ Point minimumSize (int wHint, int hHint, boolean flushCache) {
 			 * Since computeSize can be overridden by subclasses, we cannot
 			 * call computeSizeInPixels directly.
 			 */
-			Point size = Win32DPIUtils.pointToPixel(child.computeSize (DPIUtil.pixelToPoint(wHint, zoom), DPIUtil.pixelToPoint(hHint, zoom), flushCache), zoom);
+			Point size = Win32DPIUtils.pointToPixelAsSize(child.computeSize (DPIUtil.pixelToPoint(wHint, zoom), DPIUtil.pixelToPoint(hHint, zoom), flushCache), zoom);
 			width = Math.max (width, size.x);
 			height = Math.max (height, size.y);
 		}
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Table.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Table.java
@@ -2475,7 +2475,7 @@ public TableItem getItem (int index) {
 public TableItem getItem (Point point) {
 	checkWidget ();
 	if (point == null) error (SWT.ERROR_NULL_ARGUMENT);
-	return getItemInPixels (Win32DPIUtils.pointToPixel(point, getZoom()));
+	return getItemInPixels (Win32DPIUtils.pointToPixelAsLocation(point, getZoom()));
 }
 
 TableItem getItemInPixels (Point point) {
@@ -7298,7 +7298,7 @@ LRESULT wmNotifyToolTip (NMTTCUSTOMDRAW nmcd, long lParam) {
 					if (image != null) {
 						Rectangle rect = Win32DPIUtils.pointToPixel(image.getBounds(), getZoom());
 						RECT imageRect = item.getBounds (pinfo.iItem, pinfo.iSubItem, false, true, false, false, hDC);
-						Point size = imageList == null ? new Point (rect.width, rect.height) : Win32DPIUtils.pointToPixel(imageList.getImageSize(), getZoom());
+						Point size = imageList == null ? new Point (rect.width, rect.height) : Win32DPIUtils.pointToPixelAsSize(imageList.getImageSize(), getZoom());
 						int y = imageRect.top + Math.max (0, (imageRect.bottom - imageRect.top - size.y) / 2);
 						int zoom = getZoom();
 						rect = Win32DPIUtils.pixelToPoint(rect, zoom);
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/ToolBar.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/ToolBar.java
@@ -570,7 +570,7 @@ public ToolItem getItem (int index) {
 public ToolItem getItem (Point point) {
 	checkWidget ();
 	if (point == null) error (SWT.ERROR_NULL_ARGUMENT);
-	return getItemInPixels(Win32DPIUtils.pointToPixel(point, getZoom()));
+	return getItemInPixels(Win32DPIUtils.pointToPixelAsLocation(point, getZoom()));
 }
 
 ToolItem getItemInPixels (Point point) {
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/ToolTip.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/ToolTip.java
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Tree.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Tree.java
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Widget.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Widget.java
diff --git a/tests/org.eclipse.swt.tests.win32/JUnit Tests/org/eclipse/swt/tests/win32/Win32DPIUtilTests.java b/tests/org.eclipse.swt.tests.win32/JUnit Tests/org/eclipse/swt/tests/win32/Win32DPIUtilTests.java

Original file line number	Diff line number	Diff line change
`@@ -987,7 +987,7 @@ private int OnInPlaceDeactivate() {`
`987`	`987`	`return COM.S_OK;`
`988`	`988`	`}`
`989`	`989`	`private int OnPosRectChange(long lprcPosRect) {`
`990`		`- Point size = Win32DPIUtils.pointToPixel(getSize(), DPIUtil.getZoomForAutoscaleProperty(nativeZoom)); // To Pixels`
	`990`	`+ Point size = Win32DPIUtils.pointToPixelAsSize(getSize(), DPIUtil.getZoomForAutoscaleProperty(nativeZoom)); // To Pixels`
`991`	`991`	`setExtent(size.x, size.y);`
`992`	`992`	`return COM.S_OK;`
`993`	`993`	`}`
Original file line number	Diff line number	Diff line change
`@@ -2036,7 +2036,7 @@ private class DrawPointOperation extends Operation {`
`2036`	`2036`
`2037`	`2037`	`@Override`
`2038`	`2038`	`void apply() {`
`2039`		`- Point scaleUpLocation = Win32DPIUtils.pointToPixel(location, getZoom());`
	`2039`	`+ Point scaleUpLocation = Win32DPIUtils.pointToPixelAsLocation(location, getZoom());`
`2040`	`2040`	`drawPointInPixels(scaleUpLocation.x, scaleUpLocation.y);`
`2041`	`2041`	`}`
`2042`	`2042`	`}`
Original file line number	Diff line number	Diff line change
`@@ -219,7 +219,7 @@ Point computeSizeInPixels (int wHint, int hHint, boolean changed) {`
`219`	`219`	`changed \|= (state & LAYOUT_CHANGED) != 0;`
`220`	`220`	`state &= ~LAYOUT_CHANGED;`
`221`	`221`	`int zoom = getZoom();`
`222`		`- size = Win32DPIUtils.pointToPixel(layout.computeSize (this, DPIUtil.pixelToPoint(wHint, zoom), DPIUtil.pixelToPoint(hHint, zoom), changed), zoom);`
	`222`	`+ size = Win32DPIUtils.pointToPixelAsSize(layout.computeSize (this, DPIUtil.pixelToPoint(wHint, zoom), DPIUtil.pixelToPoint(hHint, zoom), changed), zoom);`
`223`	`223`	`} else {`
`224`	`224`	`size = new Point (wHint, hHint);`
`225`	`225`	`}`