?? transimage.java
字號:
import javax.microedition.lcdui.*;
public class transImage //縮放圖片
{
public static final Image scale(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;
}
return dst;
}
}
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