package screensaver;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.*;
import com.sun.image.codec.jpeg.*;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.awt.image.MemoryImageSource;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class ScreenPicSaver
{
? MediaTracker tracker = new MediaTracker(new Component()
? {});
? public ScreenPicSaver()
? {}
? public Image loadbitmap(String sdir, String sfile) //讀取8位或24位的位圖文件
? {
??? Image image;
??? System.out.println("loading:" + sdir + sfile);
??? try
??? {
????? FileInputStream fs = new FileInputStream(sdir + sfile);
????? int bflen = 14; // 14 字節(jié) BITMAPFILEHEADER
????? byte bf[] = new byte[bflen];
????? fs.read(bf, 0, bflen);
????? int bilen = 40; // 40 字節(jié) BITMAPINFOHEADER
????? byte bi[] = new byte[bilen];
????? fs.read(bi, 0, bilen);
????? // 解釋數(shù)據(jù)。
????? int nsize = ( ( (int) bf[5] & 0xff) << 24)
????????? | ( ( (int) bf[4] & 0xff) << 16)
????????? | ( ( (int) bf[3] & 0xff) << 8)
????????? | (int) bf[2] & 0xff;
????? System.out.println("File type is :" + (char) bf[0] + (char) bf[1]);
????? System.out.println("Size of file is :" + nsize);
????? int nbisize = ( ( (int) bi[3] & 0xff) << 24)
????????? | ( ( (int) bi[2] & 0xff) << 16)
????????? | ( ( (int) bi[1] & 0xff) << 8)
????????? | (int) bi[0] & 0xff;
????? System.out.println("Size of bitmapinfoheader is :" + nbisize);
????? int nwidth = ( ( (int) bi[7] & 0xff) << 24)
????????? | ( ( (int) bi[6] & 0xff) << 16)
????????? | ( ( (int) bi[5] & 0xff) << 8)
????????? | (int) bi[4] & 0xff;
????? System.out.println("Width is :" + nwidth);
????? int nheight = ( ( (int) bi[11] & 0xff) << 24)
????????? | ( ( (int) bi[10] & 0xff) << 16)
????????? | ( ( (int) bi[9] & 0xff) << 8)
????????? | (int) bi[8] & 0xff;
????? System.out.println("Height is :" + nheight);
????? int nplanes = ( ( (int) bi[13] & 0xff) << 8) | (int) bi[12] & 0xff;
????? System.out.println("Planes is :" + nplanes);
????? int nbitcount = ( ( (int) bi[15] & 0xff) << 8) | (int) bi[14] & 0xff;
????? System.out.println("BitCount is :" + nbitcount);
????? // 查找表明壓縮的非零值
????? int ncompression = ( ( (int) bi[19]) << 24)
????????? | ( ( (int) bi[18]) << 16)
????????? | ( ( (int) bi[17]) << 8)
????????? | (int) bi[16];
????? System.out.println("Compression is :" + ncompression);
????? int nsizeimage = ( ( (int) bi[23] & 0xff) << 24)
????????? | ( ( (int) bi[22] & 0xff) << 16)
????????? | ( ( (int) bi[21] & 0xff) << 8)
????????? | (int) bi[20] & 0xff;
????? System.out.println("SizeImage is :" + nsizeimage);
????? int nxpm = ( ( (int) bi[27] & 0xff) << 24)
????????? | ( ( (int) bi[26] & 0xff) << 16)
????????? | ( ( (int) bi[25] & 0xff) << 8)
????????? | (int) bi[24] & 0xff;
????? System.out.println("X-Pixels per meter is :" + nxpm);
????? int nypm = ( ( (int) bi[31] & 0xff) << 24)
????????? | ( ( (int) bi[30] & 0xff) << 16)
????????? | ( ( (int) bi[29] & 0xff) << 8)
????????? | (int) bi[28] & 0xff;
????? System.out.println("Y-Pixels per meter is :" + nypm);
????? int nclrused = ( ( (int) bi[35] & 0xff) << 24)
????????? | ( ( (int) bi[34] & 0xff) << 16)
????????? | ( ( (int) bi[33] & 0xff) << 8)
????????? | (int) bi[32] & 0xff;
????? System.out.println("Colors used are :" + nclrused);
????? int nclrimp = ( ( (int) bi[39] & 0xff) << 24)
????????? | ( ( (int) bi[38] & 0xff) << 16)
????????? | ( ( (int) bi[37] & 0xff) << 8)
????????? | (int) bi[36] & 0xff;
????? System.out.println("Colors important are :" + nclrimp);
????? if (nbitcount == 24)
????? {
??????? // 24 位格式不包含調(diào)色板數(shù)據(jù)，但掃描行被補(bǔ)足到
??????? // 4 個(gè)字節(jié)。
??????? int npad = (nsizeimage / nheight) - nwidth * 3;
??????? int ndata[] = new int[nheight * nwidth];
??????? byte brgb[] = new byte[ (nwidth + npad) * 3 * nheight];
??????? fs.read(brgb, 0, (nwidth + npad) * 3 * nheight);
??????? int nindex = 0;
??????? for (int j = 0; j < nheight; j++)
??????? {
????????? for (int i = 0; i < nwidth; i++)
????????? {
??????????? ndata[nwidth * (nheight - j - 1) + i] =
??????????????? (255 & 0xff) << 24
??????????????? | ( ( (int) brgb[nindex + 2] & 0xff) << 16)
??????????????? | ( ( (int) brgb[nindex + 1] & 0xff) << 8)
??????????????? | (int) brgb[nindex] & 0xff;
??????????? /**?? System.out.println("Encoded Color at ("
?????????????? +i + "," + j + ")is:" + nrgb + " (R,G,B)= ("
?????????????????? + ( (int) (brgb[2]) & 0xff) + ","
?????????????????? + ( (int) brgb[1] & 0xff) + ","
?????????????????? + ( (int) brgb[0] & 0xff) + ")");
???????????? }*/
??????????? nindex += 3;
????????? }
????????? nindex += npad;
??????? }
??????? image = Toolkit.getDefaultToolkit().createImage
??????????? (new MemoryImageSource(nwidth, nheight,
?????????????????????????????????? ndata, 0, nwidth));
????? }
????? else if (nbitcount == 8)
????? {
??????? // 必須確定顏色數(shù)。如果 clrsused 參數(shù)大于 0，
??????? // 則顏色數(shù)由它決定。如果它等于 0，則根據(jù)
??????? // bitsperpixel 計(jì)算顏色數(shù)。
??????? int nNumColors = 0;
??????? if (nclrused > 0)
??????? {
????????? nNumColors = nclrused;
??????? }
??????? else
??????? {
????????? nNumColors = (1 & 0xff) << nbitcount;
??????? }
??????? System.out.println("The number of Colors is" + nNumColors);
??????? // 某些位圖不計(jì)算 sizeimage 域，請找出
??????? // 這些情況并對它們進(jìn)行修正。
??????? if (nsizeimage == 0)
??????? {
????????? nsizeimage = ( ( ( (nwidth * nbitcount) + 31) & ~31) >> 3);
????????? nsizeimage *= nheight;
????????? System.out.println("nsizeimage (backup) is" + nsizeimage);
??????? }
??????? // 讀取調(diào)色板顏色。
??????? int npalette[] = new int[nNumColors];
??????? byte bpalette[] = new byte[nNumColors * 4];
??????? fs.read(bpalette, 0, nNumColors * 4);
??????? int nindex8 = 0;
??????? for (int n = 0; n < nNumColors; n++)
??????? {
????????? npalette[n] = (255 & 0xff) << 24
????????????? | ( ( (int) bpalette[nindex8 + 2] & 0xff) << 16)
????????????? | ( ( (int) bpalette[nindex8 + 1] & 0xff) << 8)
????????????? | (int) bpalette[nindex8] & 0xff;
????????? /**System.out.println ("Palette Color "+n
???????????????????? +" is:" + npalette[n] + " (res,R,G,B)= ("
????????????? + ( (int) (bpalette[nindex8 + 3]) & 0xff) + ","
????????????? + ( (int) (bpalette[nindex8 + 2]) & 0xff) + ","
????????????? + ( (int) bpalette[nindex8 + 1] & 0xff) + ","
????????????? + ( (int) bpalette[nindex8] & 0xff) + ")");
?????????? */
????????? nindex8 += 4;
??????? }
??????? // 讀取圖像數(shù)據(jù)（實(shí)際上是調(diào)色板的索引）
??????? // 掃描行仍被補(bǔ)足到 4 個(gè)字節(jié)。
??????? int npad8 = (nsizeimage / nheight) - nwidth;
??????? System.out.println("nPad is:" + npad8);
??????? int ndata8[] = new int[nwidth * nheight];
??????? byte bdata[] = new byte[ (nwidth + npad8) * nheight];
??????? fs.read(bdata, 0, (nwidth + npad8) * nheight);
??????? nindex8 = 0;
??????? for (int j8 = 0; j8 < nheight; j8++)
??????? {
????????? for (int i8 = 0; i8 < nwidth; i8++)
????????? {
??????????? ndata8[nwidth * (nheight - j8 - 1) + i8] =
??????????????? npalette[ ( (int) bdata[nindex8] & 0xff)];
??????????? nindex8++;
????????? }
????????? nindex8 += npad8;
??????? }
??????? image = Toolkit.getDefaultToolkit().createImage
??????????? (new MemoryImageSource(nwidth, nheight,
?????????????????????????????????? ndata8, 0, nwidth));
????? }
????? else
????? {
??????? System.out.println("Not a 24-bit or 8-bit Windows Bitmap, aborting...");
??????? image = (Image)null;
????? }
????? fs.close();
????? return image;
??? }
??? catch (Exception e)
??? {
????? System.out.println("Caught exception in loadbitmap!");
??? }
??? return (Image)null;
? }
? public void waitForImage(Image image)
? {
??? //tracker = new MediaTracker(this);
??? try
??? {
????? tracker.addImage(image, 0); //public void addImage(Image image,int id)
????? //tracker.waitForAll();
????? tracker.waitForID(0);
????? tracker.checkAll(true);
????? /** while(!tracker.checkID(0))
?????? {
???????? tracker.waitForID(0);
?????? }*/
????? if (tracker.isErrorAny())
????? {
??????? // System.out.println(tracker.getErrorsAny().toString());
??????? System.out.println("加載圖像出現(xiàn)錯(cuò)誤！");
??????? System.exit(0);
????? }
????? // loadStatus = tracker.statusID( 0, false );
????? // tracker.removeImage(image, 0);
??? }
??? catch (InterruptedException e)
??? {
????? e.printStackTrace();
??? }
? } // waitForImage
? public void checkImage(Image image)
? {
??? waitForImage(image);
??? int imageWidth = image.getWidth(null);
??? if (imageWidth < 1)
??? {
????? throw new IllegalArgumentException("image width " + imageWidth +
???????????????????????????????????????? " is out of range");
??? }
??? int imageHeight = image.getHeight(null);
??? if (imageHeight < 1)
??? {
????? throw new IllegalArgumentException("image height " + imageHeight +
???????????????????????????????????????? " is out of range");
??? }
??? // System.out.println( "Image size=" + imageWidth + "x" + imageHeight );
? } // checkImage
? public void encodeJPEG(OutputStream outputStream, Image outputImage,
???????????????????????? float outputQuality) throws java.io.IOException
? {
??? int outputWidth = outputImage.getWidth(null);
??? if (outputWidth < 1)
??? {
????? throw new IllegalArgumentException("output image width " + outputWidth +
???????????????????????????????????????? " is out of range");
??? }
??? int outputHeight = outputImage.getHeight(null);
??? if (outputHeight < 1)
??? {
????? throw new IllegalArgumentException("output image height " + outputHeight +
???????????????????????????????????????? " is out of range");
??? }
??? // Get a buffered image from the image.
??? BufferedImage bi = new BufferedImage(outputWidth, outputHeight,
???????????????????????????????????????? BufferedImage.TYPE_INT_RGB);
??? Graphics2D biContext = bi.createGraphics();
??? biContext.drawImage(outputImage, 0, 0, null);
??? // Note that additional drawing such as watermarks or logos can be placed here.
??? // com.sun.image.codec.jpeg package is included in sun and ibm sdk 1.3
??? JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(outputStream);
??? // The default quality is 0.75.
??? JPEGEncodeParam jep = JPEGCodec.getDefaultJPEGEncodeParam(bi);
??? jep.setQuality(outputQuality, true);
??? encoder.encode(bi, jep);
??? // encoder.encode( bi );
??? outputStream.flush();
? } // encodeImage
? /** Adjusts the size of the image to the given coordinates.
?? * If width or height is -1, the image aspect ration is maintained.
?? * <p>
?? * Hints are one of SCALE_DEFAULT, SCALE_FAST, SCALE_SMOOTH,
?? * SCALE_REPLICATE, SCALE_AREA_AVERAGING as defined in java.awt.Image.
?? */
? public Image setSize(Image image, int width, int height, int hints)
? {
??? return image.getScaledInstance(width, height, hints);
? } // setSize
? public Image setSize(Image image, int width, int height)
? {
??? return setSize(image, width, height, java.awt.Image.SCALE_DEFAULT); //setSize調(diào)用的是上一個(gè)方法.
? } // setSize
? //Component initialization
? public static void main(String[] args)
? {
??? ScreenPicSaver sps = new ScreenPicSaver();
??? // String sdir = new String("d:\\");
??? // String sfile = new String("desktop.bmp");
??? String outputFileName = new String("d:\\desktop.jpg");
??? //Image inputImage = Toolkit.getDefaultToolkit().getImage(inputFileName);
??? //Image inputImage = sps.loadbitmap(sdir, sfile);
??? //===============================================================
??? BufferedImage bufferedImage = null;
??? Robot robot;
??? Image inputImage = null;
??? try
??? {
????? robot = new Robot();
????? bufferedImage = robot.createScreenCapture(new Rectangle(Toolkit.
????????? getDefaultToolkit().getScreenSize())); //得到桌面圖像的bufferedImage對象
??? }
??? catch (Exception ex)
??? {
????? ex.printStackTrace();
??? }
??? int width = bufferedImage.getWidth();
??? int height = bufferedImage.getHeight();
??? inputImage = bufferedImage.getScaledInstance(width, height,
???????????????????????????????????????????????? BufferedImage.TYPE_INT_RGB); //將bufferedImage對象轉(zhuǎn)化位Image對象
??? MediaTracker tracker = new MediaTracker(new Component()
??? {});
??? int outputWidth = inputImage.getWidth(null); //使得新圖像和原圖像的寬度一樣
??? float outputQuality = 0.80f;
??? Image outputImage = sps.setSize(inputImage, outputWidth, -1); //-1表示在寬度確定的情況下，高度在原圖像的基礎(chǔ)上成比例縮放
??? try
??? {
????? tracker.addImage(inputImage, 0);
????? //sps.tracker.waitForAll();
????? tracker.waitForID(0);
????? tracker.checkAll(true);
??? }
??? catch (InterruptedException e)
??? {
????? e.printStackTrace();
??? }
??? int imageWidth = inputImage.getWidth(null);
??? if (imageWidth < 1)
??? {
????? throw new IllegalArgumentException("image width " + imageWidth +
???????????????????????????????????????? " is out of range");
??? }
??? int imageHeight = inputImage.getHeight(null);
??? if (imageHeight < 1)
??? {
????? throw new IllegalArgumentException("image height " + imageHeight +
???????????????????????????????????????? " is out of range");
??? }
??? try
??? {
????? FileOutputStream fos = new FileOutputStream(outputFileName);
????? sps.encodeJPEG(fos, outputImage, outputQuality);
????? fos.flush();
????? fos.close();
??? }
??? catch (Exception e)
??? {
????? e.printStackTrace();
??? }
??? System.exit(0);
? }
}