最近在做小型游戏，遇到了要翻转图片的苦恼，经过我一下午的研究，终于发现了一种好用的方法。
部分代码来源于别人，我在这个基础上修改了下，变得更好用了，之前的别人image输入都是bufferedimage，我改成了image，也就是加了一个转换。
大家如果看不懂代码没关系，会用就行了，我会展示一下怎么用的。
imagerotate类
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package mypackage;
import javax.imageio.imageio; import java.awt.*; import java.awt.image.bufferedimage; import java.io.file;
/** * author mythos_q * * time 2011-07-20 * * description 图片旋转、翻转处理 */ public class imgrotate { static int up_down_reverse = 0 ; static int left_right_reverse = 1 ; /** * 旋转图片为指定角度 * * @param bufferedimage * 目标图像 * @param degree * 旋转角度 * @return */ public static bufferedimage rotateimage( final bufferedimage bufferedimage, final int degree){ int w = bufferedimage.getwidth(); int h = bufferedimage.getheight(); int type = bufferedimage.getcolormodel().gettransparency(); bufferedimage img; graphics2d graphics2d; (graphics2d = (img = new bufferedimage(h, w, type)).creategraphics()).setrenderinghint(renderinghints.key_interpolation,renderinghints.value_interpolation_bilinear); graphics2d.rotate(math.toradians(degree), w / 2 , h / 2 + (w>h?(w-h)/ 2 :(h-w)/ 2 )); graphics2d.drawimage(bufferedimage, 0 , 0 , null ); graphics2d.dispose(); return img; }
/** * 旋转图片为指定角度 * * @param file * 目标图像 * @param degree * 旋转角度(90,180,270) * @return */ public static file rotateimage(file file, int degree) throws exception{ if (degree== 90 ) return rotateimage90(file); if (degree== 180 ) return rotateimage180(file); if (degree== 270 ) return rotateimage270(file); return null ; } public static image rotateimage(image image, int degree) { if (degree== 90 ) return rotateimage90(image); if (degree== 180 ) return rotateimage180(image); if (degree== 270 ) return rotateimage270(image); return null ; }
private static image rotateimage90(image image) { bufferedimage bufferedimage = imagetobufferedimage(image); int w = bufferedimage.getwidth(); int h = bufferedimage.getheight(); int type = bufferedimage.getcolormodel().gettransparency(); bufferedimage img; graphics2d graphics2d; (graphics2d = (img = new bufferedimage(h, w, type) ).creategraphics() ).setrenderinghint(renderinghints.key_interpolation,renderinghints.value_interpolation_bilinear); graphics2d.rotate(math.toradians( 270 ), w / 2 , h / 2 + (w-h)/ 2 ); graphics2d.drawimage(bufferedimage, 0 , 0 , null ); graphics2d.dispose();
return bufferedimagetoimage(img);
}
//左转90度 public static file rotateimage90(file file) throws exception { bufferedimage bufferedimage = imageio.read(file); int w = bufferedimage.getwidth(); int h = bufferedimage.getheight(); int type = bufferedimage.getcolormodel().gettransparency(); bufferedimage img; graphics2d graphics2d; (graphics2d = (img = new bufferedimage(h, w, type) ).creategraphics() ).setrenderinghint(renderinghints.key_interpolation,renderinghints.value_interpolation_bilinear); graphics2d.rotate(math.toradians( 270 ), w / 2 , h / 2 + (w-h)/ 2 ); graphics2d.drawimage(bufferedimage, 0 , 0 , null ); graphics2d.dispose(); imageio.write(img, "jpg" ,file); return file; }
//右转90度 public static file rotateimage270(file file) throws exception { bufferedimage bufferedimage = imageio.read(file); int w = bufferedimage.getwidth(); int h = bufferedimage.getheight(); int type = bufferedimage.getcolormodel().gettransparency(); bufferedimage img; graphics2d graphics2d; (graphics2d = (img = new bufferedimage(h, w, type)).creategraphics()).setrenderinghint(renderinghints.key_interpolation,renderinghints.value_interpolation_bilinear); graphics2d.rotate(math.toradians( 90 ), w / 2 - (w-h)/ 2 , h / 2 ); graphics2d.drawimage(bufferedimage, 0 , 0 , null ); graphics2d.dispose(); imageio.write(img, "jpg" ,file); return file; }
public static image rotateimage270(image image) { bufferedimage bufferedimage = imagetobufferedimage(image); int w = bufferedimage.getwidth(); int h = bufferedimage.getheight(); int type = bufferedimage.getcolormodel().gettransparency(); bufferedimage img; graphics2d graphics2d; (graphics2d = (img = new bufferedimage(h, w, type)).creategraphics()).setrenderinghint(renderinghints.key_interpolation,renderinghints.value_interpolation_bilinear); graphics2d.rotate(math.toradians( 90 ), w / 2 - (w-h)/ 2 , h / 2 ); graphics2d.drawimage(bufferedimage, 0 , 0 , null ); graphics2d.dispose();
return bufferedimagetoimage(img); } //对转 public static file rotateimage180(file file) throws exception { bufferedimage bufferedimage = imageio.read(file); int w = bufferedimage.getwidth(); int h = bufferedimage.getheight(); int type = bufferedimage.getcolormodel().gettransparency(); bufferedimage img; graphics2d graphics2d; (graphics2d = (img = new bufferedimage(w, h, type)).creategraphics()).setrenderinghint(renderinghints.key_interpolation,renderinghints.value_interpolation_bilinear); graphics2d.rotate(math.toradians( 180 ), w / 2 , h / 2 ); graphics2d.drawimage(bufferedimage, 0 , 0 , null ); graphics2d.dispose(); imageio.write(img, "jpg" ,file); return file; } public static image rotateimage180(image image) { bufferedimage bufferedimage = imagetobufferedimage(image); int w = bufferedimage.getwidth(); int h = bufferedimage.getheight(); int type = bufferedimage.getcolormodel().gettransparency(); bufferedimage img; graphics2d graphics2d; (graphics2d = (img = new bufferedimage(w, h, type)).creategraphics()).setrenderinghint(renderinghints.key_interpolation,renderinghints.value_interpolation_bilinear); graphics2d.rotate(math.toradians( 180 ), w / 2 , h / 2 ); graphics2d.drawimage(bufferedimage, 0 , 0 , null ); graphics2d.dispose();
return bufferedimagetoimage(img); } /*** * 图片镜像处理 * @param file * @param fx 0 为上下反转 1 为左右反转 * @return */ public static void imagemisro(file file, int fx) { try { bufferedimage bufferedimage = imageio.read(file); int w = bufferedimage.getwidth(); int h = bufferedimage.getheight();
int [][] datas = new int [w][h]; for ( int i = 0 ; i < h; i++) { for ( int j = 0 ; j < w; j++) { datas[j][i] = bufferedimage.getrgb(j, i); } } int [][] tmps = new int [w][h]; if (fx == 0 ) { for ( int i = 0 , a = h - 1 ; i < h; i++, a--) { for ( int j = 0 ; j < w; j++) { tmps[j][a] = datas[j][i]; } } } else if (fx == 1 ) { for ( int i = 0 ; i < h; i++) { for ( int j = 0 , b = w - 1 ; j < w; j++, b--) { tmps[b][i] = datas[j][i]; } } } for ( int i = 0 ; i < h; i++){ for ( int j = 0 ; j<w ;j++){ bufferedimage.setrgb(j, i, tmps[j][i]); } }
imageio.write(bufferedimage, "jpg" , file);
} catch (exception e) { e.printstacktrace(); } }
/* * * 镜像处理，输入image和方式，返回翻转的新image * type = 0 表示上下翻转，type = 1 表示左右翻转 */ public static image imagemisro(image image, int type ) { try { //用到了自己写的方法 bufferedimage bufferedimage = imagetobufferedimage(image);
int w = bufferedimage.getwidth(); int h = bufferedimage.getheight();
int [][] datas = new int [w][h]; for ( int i = 0 ; i < h; i++) { for ( int j = 0 ; j < w; j++) { datas[j][i] = bufferedimage.getrgb(j, i); } } int [][] tmps = new int [w][h]; if (type == 0 ) { for ( int i = 0 , a = h - 1 ; i < h; i++, a--) { for ( int j = 0 ; j < w; j++) { tmps[j][a] = datas[j][i]; } } } else if (type == 1 ) { for ( int i = 0 ; i < h; i++) { for ( int j = 0 , b = w - 1 ; j < w; j++, b--) { tmps[b][i] = datas[j][i]; } } } for ( int i = 0 ; i < h; i++){ for ( int j = 0 ; j<w ;j++){ bufferedimage.setrgb(j, i, tmps[j][i]); } }
image newimage = (image)bufferedimage; return newimage; //imageio.write(bufferedimage, "jpg", file);
} catch (exception e) { e.printstacktrace(); } return null ; }
//image转换成bufferedimage public static bufferedimage imagetobufferedimage( image image ) { bufferedimage bufferedimage = new bufferedimage (image.getwidth( null ), image.getheight( null ),bufferedimage.type_int_rgb); graphics g = bufferedimage.creategraphics(); g.drawimage(image, 0 , 0 , null ); //这里，大家可能会有疑问，似乎没有对bufferedimage干啥 g.dispose(); //但是是正确的，g调用drawimage就自动保存了 return bufferedimage; } //bufferedimage 转换成image类型 public static image bufferedimagetoimage( bufferedimage b ) { return (image)b; } } |
下面展示用法：
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package mypackage;
import java.awt.*; import java.awt.image.*; import java.net.url;
import javax.swing.*;
public class test extends jpanel { jframe frame; image image = new imageicon( "hand2.jpg" ).getimage(); public void paint( graphics g ) {
g.drawimage(image, 0 , 0 , null ); //之前的图片 image m = imgrotate.imagemisro(image, imgrotate.left_right_reverse); g.drawimage(m, 200 , 200 , null ); //水平翻转的图片
image mm = imgrotate.rotateimage(m, 90 ); //这里只能填90,180,270 g.drawimage(mm, 250 , 0 , null );
} public test() { frame = new jframe();
frame.add( this );
frame.setsize( 500 , 500 ); frame.setlocationrelativeto( null ); frame.setdefaultcloseoperation(jframe.exit_on_close); frame.setvisible( true ); } public static void main(string[] args) {
new test();
}
} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
原文链接：https://blog.csdn.net/qq_39627843/article/details/86497370
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