com.centit.support.image.ImageOpt Maven / Gradle / Ivy
package com.centit.support.image;
import com.centit.support.security.Md5Encoder;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
@SuppressWarnings("unused")
public abstract class ImageOpt {
private ImageOpt() {
throw new IllegalAccessError("Utility class");
}
/**
* 创建图片的缩略图 ，算法来做网络，测试通过
*
* @param filename 文件名称
* @param thumbWidth 缩略图宽度
* @param thumbHeight 缩略图高度
* @param quality 缩略图质量
* @param outFilename 输出文件名
* @throws InterruptedException 分析异常
* @throws FileNotFoundException 文件读取异常
* @throws IOException IO
*/
public static void createThumbnail(String filename, int thumbWidth, int thumbHeight, int quality,
String outFilename) throws InterruptedException, FileNotFoundException, IOException {
// load image from filename
Image image = Toolkit.getDefaultToolkit().getImage(filename);
MediaTracker mediaTracker = new MediaTracker(new Container());
mediaTracker.addImage(image, 0);
mediaTracker.waitForID(0);
// use this to test for errors at this point:
// System.out.println(mediaTracker.isErrorAny());
// determine thumbnail size from WIDTH and HEIGHT
double thumbRatio = (double) thumbWidth / (double) thumbHeight;
int imageWidth = image.getWidth(null);
int imageHeight = image.getHeight(null);
double imageRatio = (double) imageWidth / (double) imageHeight;
if (thumbRatio < imageRatio) {
thumbHeight = (int) (thumbWidth / imageRatio);
} else {
thumbWidth = (int) (thumbHeight * imageRatio);
}
// draw original image to thumbnail image object and
// scale it to the new size on-the-fly
BufferedImage thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics2D = thumbImage.createGraphics();
graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);
// save thumbnail image to outFilename
saveBufferedImage(outFilename, thumbImage, quality);
}
public static void saveBufferedImage(String filename, BufferedImage image, int quality)
throws IOException {
try (BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(filename))) {
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(image);
quality = Math.max(0, Math.min(quality, 100));
param.setQuality((float) quality / 100.0f, false);
encoder.setJPEGEncodeParam(param);
encoder.encode(image);
}
}
/**
* 抓屏程序 算法来做网络，测试通过
*
* @param fileName 文件名称
* @throws AWTException 异常
* @throws IOException 异常
*/
public static void captureScreen(String fileName) throws AWTException, IOException {
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle screenRectangle = new Rectangle(screenSize);
Robot robot = new Robot();
BufferedImage image = robot.createScreenCapture(screenRectangle);
ImageIO.write(image, "png", new File(fileName));
}
/**
* 对图像进行 裁剪
*
* @param image 图片
* @param subImageBounds 图片区域
* @return 截图
*/
public static BufferedImage saveSubImage(BufferedImage image, Rectangle subImageBounds) {
BufferedImage subImage = new BufferedImage(subImageBounds.width, subImageBounds.height, 1);
Graphics g = subImage.getGraphics();
if ((subImageBounds.width > image.getWidth()) || (subImageBounds.height > image.getHeight())) {
int left = subImageBounds.x;
int top = subImageBounds.y;
if (image.getWidth() < subImageBounds.width)
left = (subImageBounds.width - image.getWidth()) / 2;
if (image.getHeight() < subImageBounds.height)
top = (subImageBounds.height - image.getHeight()) / 2;
g.setColor(Color.white);
g.fillRect(0, 0, subImageBounds.width, subImageBounds.height);
g.drawImage(image, left, top, null);
return image;
} else {
g.drawImage(
image.getSubimage(subImageBounds.x, subImageBounds.y, subImageBounds.width, subImageBounds.height),
0, 0, null);
}
g.dispose();
return subImage;
}
public static List splitImage(BufferedImage image, int divisions) {
List images = new ArrayList<>();
if (divisions < 2) {
images.add(image);
return images;
}
int imgWidth = image.getWidth();
int subImgWidth = imgWidth / divisions;
int imgHeight = image.getHeight();
for (int i = 0; i < divisions; i++) {
BufferedImage subImage = new BufferedImage(subImgWidth, imgHeight, 1);
Graphics g = subImage.getGraphics();
g.drawImage(
image.getSubimage(imgWidth * i / divisions, 0, subImgWidth, imgHeight),
0, 0, null);
g.dispose();
images.add(subImage);
}
return images;
}
public static int[] getRGB(BufferedImage image) {
int width = image.getWidth();
int height = image.getHeight();
int[] inPixels = new int[width * height];
return getRGB(image, 0, 0, width, height, inPixels);
}
public static int[] getRGB(BufferedImage image, int x, int y, int width, int height, int[] pixels) {
int type = image.getType();
if (type == BufferedImage.TYPE_INT_ARGB || type == BufferedImage.TYPE_INT_RGB)
return (int[]) image.getRaster().getDataElements(x, y, width, height, pixels);
return image.getRGB(x, y, width, height, pixels, 0, width);
}
// ImageIO.write(image, "png", new File("/D/Projects/RunData/demo_home/images/codefan3.png"));
public static BufferedImage createIdIcon(String id, int imageSize, int pointWidth,
boolean singleColor, boolean symmetric) {
int step = imageSize / pointWidth;
if (step > 11) {
step = 10;
pointWidth = imageSize / 10;
}
if (imageSize % pointWidth != 0) {
imageSize = step * pointWidth;
}
byte[] idMd5 = Md5Encoder.rawEncode(id.getBytes());
if (idMd5 == null) {
return null;
}
//assert (idMd5.length == 16);
BufferedImage image = new BufferedImage(imageSize, imageSize,
BufferedImage.TYPE_INT_RGB);
Color showColor = new Color(idMd5[0] & 0xff, idMd5[1] & 0xff, idMd5[2] & 0xff);
// 获取图形上下文
Graphics g = image.createGraphics();
// 设定图像背景色(因为是做背景，所以偏淡)
int mid = (step - 1) / 2;
for (int i = 0; i < step; i++) {
for (int j = 0; j < step; j++) {
int row = symmetric && i > mid ? step - i - 1 : i;
int n = (row * step + j) / 8;
int b = (row * step + j) % 8;
boolean isColor = (idMd5[n] & (1 << b)) != 0;
if (j == 0 || row == 0 || j == step - 1 || row == step - 1) { // 边框
if (isColor) {
g.setColor(new Color(214, 214, 214));
} else {
g.setColor(new Color(235, 235, 235));
}
} else {
if (isColor) {
if (singleColor) {
g.setColor(showColor);
} else {
g.setColor(new Color(idMd5[n] & 0xff,
idMd5[(n * b + b) % 16] % 256 & 0xff,
idMd5[(n + b) % 16] % 256 & 0xff));
}
} else {
g.setColor(Color.LIGHT_GRAY);
}
}
g.fillRect(i * pointWidth, j * pointWidth, pointWidth, pointWidth);
}
}
// 图象生效
g.dispose();
return image;
}
public static BufferedImage createIdIcon(String id, int imageSize, int pointWidth) {
return createIdIcon(id, imageSize, pointWidth, true, true);
}
}
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