Esempio n. 1
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  /**
   * Saves an image as a gif. Currently this uses ImageMagick's "convert" (Windows or Linux) because
   * it does the best job at color reduction (and is fast and is cross-platform). This will
   * overwrite an existing file.
   *
   * @param bi
   * @param fullGifName but without the .gif at the end
   * @throws Exception if trouble
   */
  public static void saveAsGif(BufferedImage bi, String fullGifName) throws Exception {

    // POLICY: because this procedure may be used in more than one thread,
    // do work on unique temp files names using randomInt, then rename to proper file name.
    // If procedure fails half way through, there won't be a half-finished file.
    int randomInt = Math2.random(Integer.MAX_VALUE);

    // save as .bmp     (note: doesn't support transparent pixels)
    long time = System.currentTimeMillis();
    if (verbose) String2.log("SgtUtil.saveAsGif");
    ImageIO.write(bi, "bmp", new File(fullGifName + randomInt + ".bmp"));
    if (verbose) String2.log("  make .bmp done. time=" + (System.currentTimeMillis() - time));

    // "convert" to .gif
    SSR.dosOrCShell(
        "convert " + fullGifName + randomInt + ".bmp" + " " + fullGifName + randomInt + ".gif", 30);
    File2.delete(fullGifName + randomInt + ".bmp");

    // try fancy color reduction algorithms
    // Image2.saveAsGif(Image2.reduceTo216Colors(bi), fullGifName + randomInt + ".gif");

    // try dithering
    // Image2.saveAsGif216(bi, fullGifName + randomInt + ".gif", true);

    // last step: rename to final gif name
    File2.rename(fullGifName + randomInt + ".gif", fullGifName + ".gif");

    if (verbose)
      String2.log(
          "SgtUtil.saveAsGif done. TOTAL TIME=" + (System.currentTimeMillis() - time) + "\n");
  }
Esempio n. 2
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  /**
   * Saves an image as a png. This will overwrite an existing file.
   *
   * @param bi
   * @param transparent the color to be made transparent (or null if none)
   * @param outputStream (it is flushed at the end)
   * @throws Exception if trouble
   */
  public static void saveAsTransparentPng(
      BufferedImage bi, Color transparent, OutputStream outputStream) throws Exception {

    // convert transparent color to be transparent
    long time = System.currentTimeMillis();
    if (transparent != null) {
      Image image = Image2.makeImageBackgroundTransparent(bi, transparent, 10000);

      // convert image back to bufferedImage
      bi = new BufferedImage(bi.getWidth(), bi.getHeight(), BufferedImage.TYPE_INT_ARGB);
      Graphics g = bi.getGraphics();
      g.drawImage(image, 0, 0, bi.getWidth(), bi.getHeight(), null);
    }

    // save as png
    ImageIO.write(bi, "png", outputStream);
    outputStream.flush();

    if (verbose)
      String2.log("SgtUtil.saveAsPng TIME=" + (System.currentTimeMillis() - time) + "\n");
  }
Esempio n. 3
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  /**
   * Saves an image as a gif. Currently this uses ImageMagick's "convert" (Windows or Linux) because
   * it does the best job at color reduction (and is fast and is cross-platform). This will
   * overwrite an existing file.
   *
   * @param bi
   * @param transparent the color to be made transparent
   * @param fullGifName but without the .gif at the end
   * @throws Exception if trouble
   */
  public static void saveAsTransparentGif(BufferedImage bi, Color transparent, String fullGifName)
      throws Exception {

    // POLICY: because this procedure may be used in more than one thread,
    // do work on unique temp files names using randomInt, then rename to proper file name.
    // If procedure fails half way through, there won't be a half-finished file.
    int randomInt = Math2.random(Integer.MAX_VALUE);

    // convert transparent color to be transparent
    long time = System.currentTimeMillis();
    Image image = Image2.makeImageBackgroundTransparent(bi, transparent, 10000);

    // convert image back to bufferedImage
    bi = new BufferedImage(bi.getWidth(), bi.getHeight(), BufferedImage.TYPE_INT_ARGB);
    Graphics g = bi.getGraphics();
    g.drawImage(image, 0, 0, bi.getWidth(), bi.getHeight(), null);
    image = null; // encourage garbage collection

    // save as png
    int random = Math2.random(Integer.MAX_VALUE);
    ImageIO.write(bi, "png", new File(fullGifName + randomInt + ".png"));

    // "convert" to .gif
    SSR.dosOrCShell(
        "convert " + fullGifName + randomInt + ".png" + " " + fullGifName + randomInt + ".gif", 30);
    File2.delete(fullGifName + randomInt + ".png");

    // try fancy color reduction algorithms
    // Image2.saveAsGif(Image2.reduceTo216Colors(bi), fullGifName + randomInt + ".gif");

    // try dithering
    // Image2.saveAsGif216(bi, fullGifName + randomInt + ".gif", true);

    // last step: rename to final gif name
    File2.rename(fullGifName + randomInt + ".gif", fullGifName + ".gif");

    if (verbose)
      String2.log(
          "SgtUtil.saveAsTransparentGif TIME=" + (System.currentTimeMillis() - time) + "\n");
  }
Esempio n. 4
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  /** This tests SgtUtil. */
  public static void test() throws Exception {
    // test splitLine
    String2.log("\n*** SgtUtil.test");
    StringArray sa = new StringArray();

    // wide
    sa.clear();
    splitLine(38, sa, "This is a test of splitline.");
    Test.ensureEqual(sa.size(), 1, "");
    Test.ensureEqual(sa.get(0), "This is a test of splitline.", "");

    // narrow
    sa.clear();
    splitLine(12, sa, "This is a test of splitline.");
    Test.ensureEqual(sa.size(), 3, "");
    Test.ensureEqual(sa.get(0), "This is a ", "");
    Test.ensureEqual(sa.get(1), "test of ", "");
    Test.ensureEqual(sa.get(2), "splitline.", "");

    // narrow and can't split, so chop at limit
    sa.clear();
    splitLine(12, sa, "This1is2a3test4of5splitline.");
    Test.ensureEqual(sa.size(), 3, "");
    Test.ensureEqual(sa.get(0), "This1is2a3t", "");
    Test.ensureEqual(sa.get(1), "est4of5split", "");
    Test.ensureEqual(sa.get(2), "line.", "");

    // caps
    sa.clear();
    splitLine(12, sa, "THESE ARE a a REALLY WIDE.");
    Test.ensureEqual(sa.size(), 3, "");
    Test.ensureEqual(sa.get(0), "THESE ARE ", "");
    Test.ensureEqual(sa.get(1), "a a REALLY ", "");
    Test.ensureEqual(sa.get(2), "WIDE.", "");

    // test suggestPaletteRange
    Test.ensureEqual(
        suggestPaletteRange(.3, 8.9), new double[] {0, 10}, ""); // typical Rainbow Linear
    Test.ensureEqual(
        suggestPaletteRange(.11, 890), new double[] {.1, 1000}, ""); // typical Rainbow Log
    Test.ensureEqual(
        suggestPaletteRange(-7, 8),
        new double[] {-10, 10},
        ""); // typical BlueWhiteRed Linear symmetric

    // test suggestPalette
    Test.ensureEqual(
        suggestPalette(.3, 8.9), "WhiteRedBlack", ""); // small positive, large positive
    Test.ensureEqual(suggestPalette(300, 890), "Rainbow", ""); // typical Rainbow Log
    Test.ensureEqual(
        suggestPalette(-7, 8), "BlueWhiteRed", ""); // typical BlueWhiteRed Linear symmetric

    // test suggestPaletteScale
    Test.ensureEqual(suggestPaletteScale(.3, 8.9), "Linear", ""); // typical Rainbow Linear
    Test.ensureEqual(suggestPaletteScale(.11, 890), "Log", ""); // typical Rainbow Log
    Test.ensureEqual(
        suggestPaletteScale(-7, 8), "Linear", ""); // typical BlueWhiteRed Linear symmetric

    BufferedImage bi = ImageIO.read(new File(String2.unitTestDataDir + "graphs/erdBAssta5day.png"));
    long time = System.currentTimeMillis();
    Test.ensureEqual(findGraph(bi), new int[] {24, 334, 150, 21}, "");
    String2.log("findGraph time=" + (System.currentTimeMillis() - time));
  }