--- /dev/null
+package org.argeo.cms.swt.osgi;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.System.Logger;
+import java.lang.System.Logger.Level;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.batik.transcoder.TranscoderException;
+import org.apache.batik.transcoder.TranscoderInput;
+import org.apache.batik.transcoder.TranscoderOutput;
+import org.apache.batik.transcoder.image.ImageTranscoder;
+import org.apache.batik.transcoder.image.PNGTranscoder;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.widgets.Display;
+import org.osgi.framework.BundleContext;
+
+/** Theme which can dynamically create icons from SVG data. */
+public class BundleSvgTheme extends BundleCmsSwtTheme {
+ private final static Logger logger = System.getLogger(BundleSvgTheme.class.getName());
+
+ private Map<String, Map<Integer, Image>> imageCache = Collections.synchronizedMap(new HashMap<>());
+
+ private Map<Integer, ImageTranscoder> transcoders = Collections.synchronizedMap(new HashMap<>());
+
+ @Override
+ public Image getIcon(String name, Integer preferredSize) {
+ String path = "icons/types/svg/" + name + ".svg";
+ return createImageFromSvg(path, preferredSize);
+ }
+
+ protected Image createImageFromSvg(String path, Integer preferredSize) {
+ Image image = null;
+ if (imageCache.containsKey(path)) {
+ image = imageCache.get(path).get(preferredSize);
+ }
+ if (image != null)
+ return image;
+ ImageData imageData = loadFromSvg(path, preferredSize);
+ image = new Image(Display.getDefault(), imageData);
+ if (!imageCache.containsKey(path))
+ imageCache.put(path, Collections.synchronizedMap(new HashMap<>()));
+ imageCache.get(path).put(preferredSize, image);
+ return image;
+ }
+
+ protected ImageData loadFromSvg(String path, int size) {
+ ImageTranscoder transcoder = null;
+ synchronized (this) {
+ transcoder = transcoders.get(size);
+ if (transcoder == null) {
+ transcoder = new PNGTranscoder();
+ transcoder.addTranscodingHint(PNGTranscoder.KEY_WIDTH, (float) size);
+ transcoder.addTranscodingHint(PNGTranscoder.KEY_HEIGHT, (float) size);
+ transcoders.put(size, transcoder);
+ }
+ }
+ ImageData imageData;
+ try (InputStream in = getResourceAsStream(path); ByteArrayOutputStream out = new ByteArrayOutputStream();) {
+ if (in == null)
+ throw new IllegalArgumentException(path + " not found");
+ TranscoderInput input = new TranscoderInput(in);
+ TranscoderOutput output = new TranscoderOutput(out);
+ transcoder.transcode(input, output);
+ try (InputStream imageIn = new ByteArrayInputStream(out.toByteArray())) {
+ imageData = new ImageData(imageIn);
+ }
+ logger.log(Level.DEBUG, () -> "Generated " + size + "x" + size + " PNG icon from " + path);
+ } catch (IOException | TranscoderException e) {
+ throw new RuntimeException("Cannot transcode SVG " + path, e);
+ }
+
+ return imageData;
+ }
+
+ @Override
+ public void init(BundleContext bundleContext, Map<String, String> properties) {
+ super.init(bundleContext, properties);
+
+ // preload all icons
+// paths: for (String p : getImagesPaths()) {
+// if (!p.endsWith(".svg"))
+// continue paths;
+// createImageFromSvg(p, getDefaultIconSize());
+// }
+ }
+
+ @Override
+ public void destroy(BundleContext bundleContext, Map<String, String> properties) {
+ Display display = Display.getDefault();
+ if (display != null)
+ for (String path : imageCache.keySet()) {
+ for (Image image : imageCache.get(path).values()) {
+ display.syncExec(() -> image.dispose());
+ }
+ }
+ super.destroy(bundleContext, properties);
+ }
+
+}
--- /dev/null
+package org.argeo.cms.media;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.Reader;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import org.apache.batik.transcoder.TranscoderException;
+import org.apache.batik.transcoder.TranscoderInput;
+import org.apache.batik.transcoder.TranscoderOutput;
+import org.apache.batik.transcoder.image.ImageTranscoder;
+import org.apache.batik.transcoder.image.PNGTranscoder;
+import org.apache.commons.io.FilenameUtils;
+
+public class SvgToPng {
+
+ public void convertSvgDir(Path sourceDir, Path targetDir, int width) {
+ System.out.println("##\n## " + width + "px - " + sourceDir+"\n##");
+ try {
+ if (targetDir == null)
+ targetDir = sourceDir.getParent().resolve(Integer.toString(width));
+ Files.createDirectories(targetDir);
+
+ PNGTranscoder transcoder = new PNGTranscoder();
+ // transcoder.addTranscodingHint(ImageTranscoder.KEY_BACKGROUND_COLOR,
+ // Color.WHITE);
+ transcoder.addTranscodingHint(PNGTranscoder.KEY_WIDTH, (float) width);
+ transcoder.addTranscodingHint(PNGTranscoder.KEY_HEIGHT, (float) width);
+
+ for (Path source : Files.newDirectoryStream(sourceDir, "*.svg")) {
+ String baseName = FilenameUtils.getBaseName(source.toString());
+ Path target = targetDir.resolve(baseName + ".png");
+ convertSvgFile(transcoder, source, target);
+ }
+ } catch (IOException | TranscoderException e) {
+ throw new IllegalStateException("Cannot convert from " + sourceDir + " to " + targetDir, e);
+ }
+
+ }
+
+ protected void convertSvgFile(ImageTranscoder transcoder, Path source, Path target)
+ throws IOException, TranscoderException {
+ try (Reader reader = Files.newBufferedReader(source); OutputStream out = Files.newOutputStream(target);) {
+ TranscoderInput input = new TranscoderInput(reader);
+// BufferedImage image = transcoder.createImage(32, 32);
+ TranscoderOutput output = new TranscoderOutput(out);
+ transcoder.transcode(input, output);
+ System.out.println(source.getFileName() + " -> " + target);
+ }
+ }
+
+ public static void main(String[] args) throws Exception {
+
+ Path path = Paths.get(args[0]);
+
+ SvgToPng svgToPng = new SvgToPng();
+ svgToPng.convertSvgDir(path, null, 16);
+ svgToPng.convertSvgDir(path, null, 32);
+ svgToPng.convertSvgDir(path, null, 64);
+ svgToPng.convertSvgDir(path, null, 96);
+ }
+}