bitmapfont.java

生物物种进化历程的演示

package BitmapFont;

import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.io.*;

import BitmapFont.*;

public class BitmapFont {
    
    char ch; // the ascii character
    int width;
    int height;
    byte[] data;

    public BitmapFont() {
    }


    public BitmapFont(char c) {
	ch = c;
    }

    public void print(boolean verbose) {

	int widthb = ((width-1)/8+1); // number of bytes per row
	System.out.println("characters: "+ch+" width: "+width+" height: "+height);
	if(!verbose) return;
	for(int j=height-1; j>=0; j--) {
	    for(int k=0; k<widthb; k++) {
		int s = data[j*widthb+k];
		for(int l = 0; l<8; l++) {
		    if((s&0x80)!=0)
			System.out.print("X");
		    else
			System.out.print(".");
		    s = s<<1;
		}
	    }
	    System.out.println();
	}
    }

    public void generate(BufferedImage bim, int[] B, FontMetrics fm) {
	
	// Graphics g =  bim.getGraphics();
	// FontMetrics fm = g.getFontMetrics();
	int bwidth = bim.getWidth();
	int bheight = bim.getHeight();
	bim.getData().getDataElements(0, 0, bwidth, bheight, B);
	width = fm.charWidth((char)(ch));
	height = fm.getHeight();
	data = new byte[(((width-1)/8)+1)*height];
	int i,j;
	int k = 0;
	for(i=height-1; i>=0; i--) {
	    int bm = 0;
	    for(j=0; j<width; j++) {
		int b = ((B[bwidth*i+j]&0xff00)==0)?(byte)0:(byte)1;
		bm = bm<<1;
		bm = b|bm;
		if(j%8==7) {
		    data[k] = (byte)bm;
		    bm = 0;
		    k++;
		}
	    }
	    if(j%8!=0) {
		bm = bm<<(7-((j-1)%8));
		data[k] = (byte)bm;
		k++;
	    }
	}
    }

    public void read(DataInputStream fin) throws IOException{

	ch = fin.readChar();
	width = fin.readInt();
	height = fin.readInt();
	//System.out.println(ch+" "+width+" "+height);
	int widthb = ((width-1)/8+1); // number of bytes per row
	int len = widthb*height;
	data = new byte[len];
	fin.read(data, 0, len);
    }

    public void write(DataOutputStream fout) throws IOException{

	fout.writeChar(ch);
	fout.writeInt(width);
	fout.writeInt(height);
	fout.write(data, 0, data.length);
    }
}