imagetool.java

名作puyo 移植的手机版

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

public class ImageTool{
	
	public ImageTool(){
		
	}
	
	public static void drawFrame(Graphics g,Image source,int x,int y,int w,int h,int[] framesInfo,int id){
		g.setClip(x,y,w,h);
		g.drawImage(source,x-framesInfo[id*2],y-framesInfo[id*2+1],Graphics.TOP|Graphics.LEFT);
	}
	
	//切成大小一样的图片，此函数返回保存图片序列的x,y坐标的数组
	public static int[] getImageSequenceInfo(Image source,int frameWidth,int frameHeight){

		if((source.getWidth()%frameWidth)!=0||(source.getHeight()%frameHeight)!=0){
			 throw new IllegalArgumentException();
		}
		int framesW=source.getWidth()/frameWidth;
		int framesH=source.getHeight()/frameHeight;
		int[] frames=new int[framesW*framesH*2];
		int framesCount=0;
		
		for(int j=0;j<framesH;j++){
			for(int i=0;i<framesW;i++){
				//info of x
				frames[framesCount++]=i*frameWidth;
				//info of y
				frames[framesCount++]=j*frameHeight;
			}
		}
		return frames;
	}
}