/* * To change this template, choose Tools | Templates * and open the template in the editor. */package cn.sda.ui;import javax.microedition.lcdui.Graphics;import javax.microedition.lcdui.Image;/** * * @author Administrator */public class SDAImageUtils {    public static int MODE_STRETCH = 0x10;    public static int MODE_STRETCH_HORIZONTAL = 0x11;    public static int MODE_STRETCH_VERTICAL = 0x12;    public static int MODE_REPEAT = 0x20;    /*    1.將一張圖片pic轉換成176*208的圖        pic=transImage(pic,176,208);        2.將一張圖片pic轉換成原來的兩倍大        pic=scaleImage(pic,2,1);        3.將一張圖片pic轉換成原來的三分之二        pic=scaleImage(pic,2,3);             */    private static final Image scaleImage(Image src, int scales1, int scales2) {        return transImage(src, src.getWidth() * scales1 / scales2,                src.getHeight() * scales1 / scales2);    }    private static final Image transImage(Image src, int w, int h) {        int srcW = src.getWidth();        int srcH = src.getHeight();        int dstW = w, dstH = h;        Image tmp = Image.createImage(dstW, srcH);        Graphics g = tmp.getGraphics();        int scale = 16;        int delta = (srcW << scale) / dstW; //掃描長度        int pos = delta / 2; //掃描位置        for (int x = 0; x < dstW; x++) {            g.setClip(x, 0, 1, srcH);            g.drawImage(src, x - (pos >> scale), 0,                    Graphics.LEFT | Graphics.TOP);            pos += delta;        }        Image dst = Image.createImage(dstW, dstH);        g = dst.getGraphics();        delta = (srcH << scale) / dstH;        pos = delta / 2;        for (int y = 0; y < dstH; y++) {            g.setClip(0, y, dstW, 1);            g.drawImage(tmp, 0, y - (pos >> scale),                    Graphics.LEFT | Graphics.TOP);            pos += delta;        }        tmp = null;        return dst;    }    public static Image processImage(Image img, int dstWidth, int dstHeight, int mode) {        if (mode == MODE_STRETCH) {            return transImage(img, dstWidth, dstHeight);        }        if (mode == MODE_STRETCH_HORIZONTAL) {            return transImage(img, dstWidth, img.getHeight());        }        if (mode == MODE_STRETCH_VERTICAL) {            return transImage(img, img.getWidth(), dstHeight);        }        if (mode == MODE_REPEAT) {            Image result = Image.createImage(dstWidth, dstHeight);            Graphics g = result.getGraphics();            int icount = dstWidth / img.getWidth() + 1;            int jcount = dstHeight / img.getHeight() + 1;            for (int i = 0; i < icount; i++) {                for (int j = 0; i < jcount; j++) {                    g.drawImage(img, i * img.getWidth(), j * img.getHeight(), 0);                }            }            return result;        }        if(mode==(MODE_STRETCH_HORIZONTAL|MODE_REPEAT))        {            Image result = Image.createImage(dstWidth, dstHeight);            Graphics g = result.getGraphics();            Image tmp=transImage(img, dstWidth, img.getHeight());            int count = dstHeight / img.getHeight() + 1;            for(int i=0;i<count;i++)            {                g.drawImage(tmp, 0, i*img.getHeight(), 0);            }            tmp=null;            return result;        }        if(mode==(MODE_STRETCH_VERTICAL|MODE_REPEAT))        {            Image result = Image.createImage(dstWidth, dstHeight);            Graphics g = result.getGraphics();            Image tmp=transImage(img, img.getWidth(), dstHeight);            int count = dstWidth / img.getWidth() + 1;            for(int i=0;i<count;i++)            {                g.drawImage(tmp, i*img.getWidth(), 0, 0);            }            tmp=null;            return result;        }                return img;    }}