| /******************************************************************************* |
| * Copyright (c) 2018 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.graphics; |
| |
| /** |
| * Interface to provide a callback mechanism to get information about images |
| * when the application is moved from a low DPI monitor to a high DPI monitor. |
| * This provides API which will be called by SWT during the image rendering. |
| * |
| * This interface needs to be implemented by client code to provide the |
| * image information on demand. |
| * |
| * @since 3.104 |
| */ |
| public interface ImageDataProvider { |
| |
| |
| /** |
| * Returns the image data for the given zoom level. |
| * <p> |
| * If no image is available for a particular zoom level, this method should |
| * return <code>null</code>. For <code>zoom == 100</code>, returning |
| * <code>null</code> is not allowed, and SWT will throw an exception. |
| * |
| * @param zoom |
| * The zoom level in % of the standard resolution (which is 1 |
| * physical monitor pixel == 1 SWT logical pixel). Typically 100, |
| * 150, or 200. |
| * @return the image data, or <code>null</code> if <code>zoom != 100</code> |
| * and no image is available for the given zoom level. |
| * @since 3.104 |
| */ |
| ImageData getImageData (int zoom); |
| |
| } |
