Detect the desired size from the path or Query parameters.

bundles/org.eclipse.jface/META-INF/MANIFEST.MF

@@ -34,7 +34,7 @@ Export-Package: org.eclipse.jface,
  org.eclipse.jface.window,
  org.eclipse.jface.wizard,
  org.eclipse.jface.wizard.images
-Require-Bundle: org.eclipse.swt;bundle-version="[3.126.0,4.0.0)";visibility:=reexport,
+Require-Bundle: org.eclipse.swt;bundle-version="[3.132.0,3.134.0)";visibility:=reexport,
  org.eclipse.core.commands;bundle-version="[3.4.0,4.0.0)";visibility:=reexport,
  org.eclipse.equinox.common;bundle-version="[3.18.0,4.0.0)",
  org.eclipse.equinox.bidi;bundle-version="[0.10.0,2.0.0)";resolution:=optional

bundles/org.eclipse.jface/src/org/eclipse/jface/resource/URLHintProvider.java

@@ -0,0 +1,50 @@
+/*******************************************************************************
+ * Copyright (c) 2025 Christoph Läubrich and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Christoph Läubrich - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jface.resource;
+
+import java.net.URL;
+import java.util.function.Supplier;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.eclipse.swt.graphics.Point;
+
+class URLHintProvider implements Supplier<Point> {
+
+	private static final Pattern QUERY_PATTERN = Pattern.compile("&size=(\\d+)x(\\d+)"); //$NON-NLS-1$
+	private static final Pattern PATH_PATTERN = Pattern.compile("/(\\d+)x(\\d+)/"); //$NON-NLS-1$
+
+	private URL url;
+
+	public URLHintProvider(URL url) {
+		this.url = url;
+	}
+
+	@Override
+	public Point get() {
+		String query = url.getQuery();
+		Matcher matcher;
+		if (query != null && !query.isEmpty()) {
+			matcher = QUERY_PATTERN.matcher("&" + query); //$NON-NLS-1$
+		} else {
+			String path = url.getPath();
+			matcher = PATH_PATTERN.matcher(path);
+		}
+		if (matcher.find()) {
+			return new Point(Integer.parseInt(matcher.group(1)), Integer.parseInt(matcher.group(2)));
+		}
+		return null;
+	}
+
+}

bundles/org.eclipse.jface/src/org/eclipse/jface/resource/URLImageDescriptor.java

@@ -25,6 +25,7 @@
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.function.Function;
+import java.util.function.Supplier;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -42,6 +43,7 @@
 import org.eclipse.swt.graphics.ImageDataProvider;
 import org.eclipse.swt.graphics.ImageFileNameProvider;
 import org.eclipse.swt.graphics.ImageLoader;
+import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.internal.DPIUtil.ElementAtZoom;
 import org.eclipse.swt.internal.NativeImageLoader;
 import org.eclipse.swt.internal.image.FileFormat;
@@ -59,6 +61,11 @@
 			if (tempURL != null) {
 				final boolean logIOException = zoom == 100;
 				if (zoom == 100) {
+					// Do not use file path if URL has query parameters (e.g., size hints)
+					// because getFilePath() strips the query and size hints would be lost
+					if (tempURL.getQuery() != null) {
+						return null;
+					}
 					// Do not take this path if the image file can be scaled up dynamically.
 					// The calling image will do that itself!
 					return getFilePath(tempURL, logIOException);
@@ -133,7 +140,7 @@
 	private static ImageData getImageData(URL url, int fileZoom, int targetZoom) {
 		try (InputStream in = getStream(url)) {
 			if (in != null) {
-				return loadImageFromStream(new BufferedInputStream(in), fileZoom, targetZoom);
+				return loadImageFromStream(new BufferedInputStream(in), fileZoom, targetZoom, new URLHintProvider(url));
 			}
 		} catch (SWTException e) {
 			if (e.code != SWT.ERROR_INVALID_IMAGE) {
@@ -146,8 +153,14 @@
 		return null;
 	}
 
 	@SuppressWarnings("restriction")
-	private static ImageData loadImageFromStream(InputStream stream, int fileZoom, int targetZoom) {
+	private static ImageData loadImageFromStream(InputStream stream, int fileZoom, int targetZoom,
+			Supplier<Point> hintProvider) {
+		Point hintSize = hintProvider.get();
+		if (hintSize != null) {
+			return NativeImageLoader.load(stream, new ImageLoader(), hintSize.x * targetZoom / fileZoom,
+					hintSize.y * targetZoom / fileZoom);
+		}
 		return NativeImageLoader.load(new ElementAtZoom<>(stream, fileZoom), new ImageLoader(), targetZoom).get(0)
 				.element();
 	}
@@ -169,8 +182,14 @@
 			if (InternalPolicy.OSGI_AVAILABLE) {
 				url = resolvePathVariables(url);
 			}
+			// For file: URLs, strip query parameters before opening the stream
+			// Query parameters are used for size hints but are not valid in file paths
+			if (FILE_PROTOCOL.equalsIgnoreCase(url.getProtocol()) && url.getQuery() != null) {
+				url = new URL(url.getProtocol(), url.getHost(), url.getPort(), url.getPath());
+			}
 			return url.openStream();
 		} catch (IOException e) {
+			e.printStackTrace();
 			if (InternalPolicy.DEBUG_LOG_URL_IMAGE_DESCRIPTOR_MISSING_2x) {
 				String path = url.getPath();
 				if (path.endsWith("@2x.png") || path.endsWith("@1.5x.png")) { //$NON-NLS-1$ //$NON-NLS-2$