package nl.captcha.text.renderer;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
/**
* Render a word using the given color and from a randomly selected font chosen from
* a list of fonts given in the constructor.
*
* @author <a href="mailto:james.childers@gmail.com">James Childers</a>
*/
public class DefaultWordRenderer implements WordRenderer {
private static final Color DEFAULT_COLOR = Color.BLACK;
private static final List<Font> DEFAULT_FONTS = new ArrayList<Font>();
private final Color _color;
private final List<Font> _fonts;
static {
DEFAULT_FONTS.add(new Font("Arial", Font.BOLD, 40));
DEFAULT_FONTS.add(new Font("Courier", Font.BOLD, 40));
}
/**
* Will render the characters in black and in either 40pt Arial or Courier.
*/
public DefaultWordRenderer() {
this(DEFAULT_COLOR, DEFAULT_FONTS);
}
public DefaultWordRenderer(Color color, List<Font> fonts) {
_color = color != null ? color : DEFAULT_COLOR;
_fonts = fonts != null ? fonts : DEFAULT_FONTS;
}
/**
* Render a word onto a BufferedImage.
*
* @param word The word to be rendered.
* @param bi The BufferedImage onto which the word will be painted on to
*/
public void render(String word, BufferedImage image) {
Graphics2D g = image.createGraphics();
RenderingHints hints = new RenderingHints(
RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
hints.add(new RenderingHints(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY));
g.setRenderingHints(hints);
g.setColor(_color);
FontRenderContext frc = g.getFontRenderContext();
int startPosX = 25;
char[] wc = word.toCharArray();
Random generator = new Random();
for (char element : wc) {
char[] itchar = new char[] { element };
int choiceFont = generator.nextInt(_fonts.size());
Font itFont = _fonts.get(choiceFont);
g.setFont(itFont);
GlyphVector gv = itFont.createGlyphVector(frc, itchar);
double charWitdth = gv.getVisualBounds().getWidth();
g.drawChars(itchar, 0, itchar.length, startPosX, 35);
startPosX = startPosX + (int) charWitdth;
}
}
}