package service.course.tools;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
/**
* Created by evilgod528 on 15/2/11.
*/
public class PsImage {
private File originImage;
//正在处理的内存中的图片
private BufferedImage bufferedImage;
private BufferedImage dealedImage;
public PsImage(File image) throws IOException {
if(image.exists()) {
this.originImage = image;
this.bufferedImage = ImageIO.read(image);
this.dealedImage = this.bufferedImage;
}else{
throw new FileNotFoundException("图片文件文件不存在");
}
}
private String getFileType(String imageName){
String imageType = "jpg";
int index = imageName.lastIndexOf(".");
if(index!=-1 && index!=imageName.length()){
imageType = imageName.substring(index+1);
}
return imageType;
}
//生成处理后的图片，若参数为null，则修改原始图片
public boolean createPic(File disposedImage){
boolean flag = false;
if(disposedImage==null){
disposedImage = originImage;
}
String imageType = getFileType(disposedImage.getName());
try {
flag = ImageIO.write(dealedImage,imageType,disposedImage);
} catch (IOException e) {
e.printStackTrace();
}
return flag;
}
//图片缩放处理
public PsImage scale(int width,int height){
BufferedImage newImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = newImg.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(this.dealedImage, 0, 0, width, height, null);
this.dealedImage = newImg;
g.dispose();
return this;
}
//剪切处理
public PsImage clip(int srcX,int srcY,int width,int height){
BufferedImage newImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = newImg.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.setColor(Color.WHITE);
g.fillRect(0, 0, width, height);
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(this.dealedImage, 0, 0, width, height, srcX, srcY, srcX + width, srcY + height, null);
this.dealedImage = newImg;
g.dispose();
return this;
}
//angle：角度，图片旋转角度
public PsImage rotate(int angle){
int width = this.dealedImage.getWidth();
int height = this.dealedImage.getHeight();
int new_w = 0, new_h = 0;
int new_radian = angle;
if (angle <= 90) {
new_w = (int) (width * Math.cos(Math.toRadians(new_radian)) + height * Math.sin(Math.toRadians(new_radian)));
new_h = (int) (height * Math.cos(Math.toRadians(new_radian)) + width * Math.sin(Math.toRadians(new_radian)));
} else if (angle <= 180) {
new_radian = angle - 90;
new_w = (int) (height * Math.cos(Math.toRadians(new_radian)) + width * Math.sin(Math.toRadians(new_radian)));
new_h = (int) (width * Math.cos(Math.toRadians(new_radian)) + height * Math.sin(Math.toRadians(new_radian)));
} else if (angle <= 270) {
new_radian = angle - 180;
new_w = (int) (width * Math.cos(Math.toRadians(new_radian)) + height * Math.sin(Math.toRadians(new_radian)));
new_h = (int) (height * Math.cos(Math.toRadians(new_radian)) + width * Math.sin(Math.toRadians(new_radian)));
} else {
new_radian = angle - 270;
new_w = (int) (height * Math.cos(Math.toRadians(new_radian)) + width * Math.sin(Math.toRadians(new_radian)));
new_h = (int) (width * Math.cos(Math.toRadians(new_radian)) + height * Math.sin(Math.toRadians(new_radian)));
}
BufferedImage toStore = new BufferedImage(new_w, new_h, BufferedImage.TYPE_INT_RGB);
Graphics2D g = toStore.createGraphics();
AffineTransform affineTransform = new AffineTransform();
affineTransform.rotate(Math.toRadians(angle), width / 2, height / 2);
if (angle != 180) {
AffineTransform translationTransform = this.findTranslation(affineTransform, this.dealedImage, angle);
affineTransform.preConcatenate(translationTransform);
}
g.setColor(Color.WHITE);
g.fillRect(0, 0, new_w, new_h);
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawRenderedImage(this.dealedImage, affineTransform);
g.dispose();
this.dealedImage = toStore;
return this;
}
//isVertical:true,垂直翻转 ; false,水平翻转
public PsImage reverse(boolean isVertical){
int width = this.dealedImage.getWidth();
int height = this.dealedImage.getHeight();
double[] matrix;
if(isVertical){
matrix = new double[]{1, 0, 0, -1, 0,height};
}else {
matrix = new double[]{-1, 0, 0, 1,width,0};
}
AffineTransform affineTransform = new AffineTransform(matrix);
BufferedImage newImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = newImg.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawRenderedImage(this.dealedImage, affineTransform);
g.dispose();
this.dealedImage = newImg;
return this;
}
private AffineTransform findTranslation(AffineTransform at, BufferedImage bi, int angle) {//45
Point2D p2din, p2dout;
double ytrans = 0.0, xtrans = 0.0;
if (angle <= 90) {
p2din = new Point2D.Double(0.0, 0.0);
p2dout = at.transform(p2din, null);
ytrans = p2dout.getY();
p2din = new Point2D.Double(0, bi.getHeight());
p2dout = at.transform(p2din, null);
xtrans = p2dout.getX();
}
/*else if(angle<=135){
p2din = new Point2D.Double(0.0, bi.getHeight());
p2dout = at.transform(p2din, null);
ytrans = p2dout.getY();
p2din = new Point2D.Double(bi.getWidth(),bi.getHeight());
p2dout = at.transform(p2din, null);
xtrans = p2dout.getX();
}*/
else if (angle <= 180) {
p2din = new Point2D.Double(0.0, bi.getHeight());
p2dout = at.transform(p2din, null);
ytrans = p2dout.getY();
p2din = new Point2D.Double(bi.getWidth(), bi.getHeight());
p2dout = at.transform(p2din, null);
xtrans = p2dout.getX();
}
/*else if(angle<=225){
p2din = new Point2D.Double(bi.getWidth(), bi.getHeight());
p2dout = at.transform(p2din, null);
ytrans = p2dout.getY();
p2din = new Point2D.Double(bi.getWidth(),0.0);
p2dout = at.transform(p2din, null);
xtrans = p2dout.getX();
}*/
else if (angle <= 270) {
p2din = new Point2D.Double(bi.getWidth(), bi.getHeight());
p2dout = at.transform(p2din, null);
ytrans = p2dout.getY();
p2din = new Point2D.Double(bi.getWidth(), 0.0);
p2dout = at.transform(p2din, null);
xtrans = p2dout.getX();
} else {
p2din = new Point2D.Double(bi.getWidth(), 0.0);
p2dout = at.transform(p2din, null);
ytrans = p2dout.getY();
p2din = new Point2D.Double(0.0, 0.0);
p2dout = at.transform(p2din, null);
xtrans = p2dout.getX();
}
AffineTransform tat = new AffineTransform();
tat.translate(-xtrans, -ytrans);
return tat;
}
}
