最近在做小型游戲，遇到了要翻轉圖片的苦惱，經過我一下午的研究，終于發現了一種好用的方法。
部分代碼來源于別人，我在這個基礎上修改了下，變得更好用了，之前的別人image輸入都是bufferedimage，我改成了image，也就是加了一個轉換。
大家如果看不懂代碼沒關系，會用就行了，我會展示一下怎么用的。
imagerotate類
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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 圖片旋轉、翻轉處理 */public class imgrotate { static int up_down_reverse = 0; static int left_right_reverse = 1; /** * 旋轉圖片為指定角度 * * @param bufferedimage * 目標圖像 * @param degree * 旋轉角度 * @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; } /** * 旋轉圖片為指定角度 * * @param file * 目標圖像 * @param degree * 旋轉角度(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); } //左轉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; } //右轉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); } //對轉 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); } /*** * 圖片鏡像處理 * @param file * @param fx 0 為上下反轉 1 為左右反轉 * @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(); } } /* * * 鏡像處理，輸入image和方式，返回翻轉的新image * type = 0 表示上下翻轉，type = 1 表示左右翻轉 */ public static image imagemisro(image image,int type ) { try { //用到了自己寫的方法 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轉換成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); //這里，大家可能會有疑問，似乎沒有對bufferedimage干啥 g.dispose(); //但是是正確的，g調用drawimage就自動保存了 return bufferedimage; } //bufferedimage 轉換成image類型 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); //之前的圖片 image m = imgrotate.imagemisro(image, imgrotate.left_right_reverse); g.drawimage(m, 200, 200, null); //水平翻轉的圖片 image mm = imgrotate.rotateimage(m, 90); //這里只能填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內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/qq_39627843/article/details/86497370
