Demo: new window icon

flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/SVGUtils.java

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+/*
+ * Copyright 2020 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.extras;
+
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.RenderingHints;
+import java.awt.image.BufferedImage;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.Arrays;
+import java.util.List;
+import javax.swing.JWindow;
+import com.kitfox.svg.SVGCache;
+import com.kitfox.svg.SVGDiagram;
+import com.kitfox.svg.SVGException;
+
+/**
+ * @author Karl Tauber
+ */
+public class SVGUtils
+{
+	/**
+	 * Creates from the given SVG a list of icon images with different sizes that
+	 * can be used for windows headers. The SVG should have a size of 16 x 16.
+	 *
+	 * @see JWindow#setIconImages(List)
+	 */
+	public static List<Image> createWindowIconImages( String svgName ) {
+		return Arrays.asList(
+			svg2image( svgName, 1f ),	// 16 x 16
+			svg2image( svgName, 1.5f ),	// 24 x 24
+			svg2image( svgName, 2f ),	// 32 x 32
+			svg2image( svgName, 3f ),	// 48 x 48
+			svg2image( svgName, 4f )		// 64 x 64
+		);
+	}
+
+	/**
+	 * Creates a buffered image and renders the given SVG into it.
+	 */
+	public static BufferedImage svg2image( String svgName, float scaleFactor ) {
+		try {
+			URL url = SVGUtils.class.getResource( svgName );
+			SVGDiagram diagram = SVGCache.getSVGUniverse().getDiagram( url.toURI() );
+
+			BufferedImage image = new BufferedImage(
+				(int) (diagram.getWidth() * scaleFactor),
+				(int) (diagram.getHeight() * scaleFactor),
+				BufferedImage.TYPE_INT_ARGB );
+
+			Graphics2D g = image.createGraphics();
+			try {
+				g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
+				g.setRenderingHint( RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR );
+
+				if( scaleFactor != 1f )
+					g.scale( scaleFactor, scaleFactor );
+
+				diagram.setIgnoringClipHeuristic( true );
+
+				diagram.render( g );
+			} finally {
+				g.dispose();
+			}
+			return image;
+
+		} catch( URISyntaxException | SVGException ex ) {
+			throw new RuntimeException( ex );
+		}
+	}
+}