Java でアスキーアート画像を生成する

要は

文字列を指定された *.ttf ファイルを使って画像化したい！！
こんな画像作りたい

と言う訳で書いてみました

"-D" オプションでいろいろ設定できます。

import java.lang.String;
import java.lang.System;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.File;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.awt.GraphicsEnvironment;
import java.awt.Font;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.RenderingHints;
import javax.imageio.ImageIO;

public class CreateImage {

  private static String P(String name, String def) {
    return System.getProperty(name, def);
  }
 
  public static void main(String[] args) throws Exception {

    final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in, P("charset", "UTF-8")));
    final Collection<String> list = new LinkedList<String>();

    final int width = Integer.parseInt(P("width", "600"));
    final int height = Integer.parseInt(P("height", "400"));

    GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
    Font font = Font.createFont(Font.TRUETYPE_FONT, new File(P("fontpath", "ipagp-mona.ttf")));
    env.registerFont(font);

    String line;
    while ((line = reader.readLine()) != null) {
      list.add(line);
    }   
    final int lineLength = list.size();
    final float fontHeight = height / lineLength;

    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D g = image.createGraphics();
    g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_VBGR);
    g.setColor(Color.WHITE);
    g.fillRect(0, 0, image.getWidth(), image.getHeight());
    g.setColor(Color.BLACK);
    g.setFont(font.deriveFont(fontHeight));

    Iterator<String> it = list.iterator();
    for (int i = 0; it.hasNext(); i++) {
      g.drawString(it.next(), 10, i * fontHeight + fontHeight);
    }   

    ImageIO.write(image, "png", new File(P("output", "hoge.png")));
  }
}