org.argeo.cms.ux/src/org/argeo/cms/media/SvgToPng.java

   1 package org.argeo.cms.media;
   2
   3 import java.io.IOException;
   4 import java.io.OutputStream;
   5 import java.io.Reader;
   6 import java.nio.file.Files;
   7 import java.nio.file.Path;
   8 import java.nio.file.Paths;
   9
  10 import org.apache.batik.transcoder.TranscoderException;
  11 import org.apache.batik.transcoder.TranscoderInput;
  12 import org.apache.batik.transcoder.TranscoderOutput;
  13 import org.apache.batik.transcoder.image.ImageTranscoder;
  14 import org.apache.batik.transcoder.image.PNGTranscoder;
  15
  16 public class SvgToPng {
  17
  18         public void convertSvgDir(Path sourceDir, Path targetDir, int width) {
  19                 System.out.println("##\n## " + width + "px - " + sourceDir + "\n##");
  20                 try {
  21                         if (targetDir == null)
  22                                 targetDir = sourceDir.getParent().resolve(Integer.toString(width));
  23                         Files.createDirectories(targetDir);
  24
  25                         PNGTranscoder transcoder = new PNGTranscoder();
  26                         // transcoder.addTranscodingHint(ImageTranscoder.KEY_BACKGROUND_COLOR,
  27                         // Color.WHITE);
  28                         transcoder.addTranscodingHint(PNGTranscoder.KEY_WIDTH, (float) width);
  29                         transcoder.addTranscodingHint(PNGTranscoder.KEY_HEIGHT, (float) width);
  30
  31                         for (Path source : Files.newDirectoryStream(sourceDir, "*.svg")) {
  32                                 // FIXME extract base name
  33                                 String baseName = null; // = FilenameUtils.getBaseName(source.toString());
  34                                 Path target = targetDir.resolve(baseName + ".png");
  35                                 convertSvgFile(transcoder, source, target);
  36                         }
  37                 } catch (IOException | TranscoderException e) {
  38                         throw new IllegalStateException("Cannot convert from " + sourceDir + " to " + targetDir, e);
  39                 }
  40
  41         }
  42
  43         protected void convertSvgFile(ImageTranscoder transcoder, Path source, Path target)
  44                         throws IOException, TranscoderException {
  45                 try (Reader reader = Files.newBufferedReader(source); OutputStream out = Files.newOutputStream(target);) {
  46                         TranscoderInput input = new TranscoderInput(reader);
  47 //                      BufferedImage image = transcoder.createImage(32, 32);
  48                         TranscoderOutput output = new TranscoderOutput(out);
  49                         transcoder.transcode(input, output);
  50                         System.out.println(source.getFileName() + " -> " + target);
  51                 }
  52         }
  53
  54         public static void main(String[] args) throws Exception {
  55
  56                 Path path = Paths.get(args[0]);
  57
  58                 SvgToPng svgToPng = new SvgToPng();
  59                 svgToPng.convertSvgDir(path, null, 16);
  60                 svgToPng.convertSvgDir(path, null, 32);
  61                 svgToPng.convertSvgDir(path, null, 64);
  62                 svgToPng.convertSvgDir(path, null, 96);
  63         }
  64 }