/**
* 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");
}
/**
* 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");
}
/**
* 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");
}
/** 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));
}