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package com.github.nagaseyasuhito.api.textimage.impl;

import java.awt.Color;
import java.awt.Font;
import java.awt.FontFormatException;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import org.apache.commons.vfs2.VFS;

import com.github.nagaseyasuhito.api.textimage.TextImageResource;

public class TextImageResourceImpl implements TextImageResource {

	@Override
	public BufferedImage build(String value, URL fontArchive) throws IOException, FontFormatException {
		Font font = null;

		// http://www.searchfreefonts.com/download/download.ashx?d=211962!GMEXShad.TTF
		if (fontArchive != null) {
			InputStream inputStream = VFS.getManager().resolveFile("zip:" + fontArchive).getContent().getInputStream();

			font = Font.createFont(Font.TRUETYPE_FONT, inputStream);
		}

		Graphics calculator = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB).getGraphics();
		calculator.setFont(font == null ? new Font(null, 0, 24) : font);
		int width = calculator.getFontMetrics().stringWidth(value);
		int height = calculator.getFontMetrics().getHeight();
		int ascent = calculator.getFontMetrics().getAscent();

		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
		Graphics2D graphics = (Graphics2D) image.getGraphics();
		graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_GASP);
		graphics.setFont(font == null ? new Font(null, 0, 24) : font);
		graphics.setColor(Color.BLACK);
		graphics.drawString(value, 0, ascent);

		return image;
	}

}