com.appslandia.plum.captcha.GradientBgProducer Maven / Gradle / Ivy

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// The MIT License (MIT)
// Copyright © 2015 AppsLandia. All rights reserved.

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package com.appslandia.plum.captcha;

import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;

import com.appslandia.common.base.InitializeObject;

/**
 *
 * @author Loc Ha
 *
 */
public class GradientBgProducer extends InitializeObject implements BackgroundProducer {

  private Color fromColor;
  private Color toColor;

  @Override
  protected void init() throws Exception {
    if (this.fromColor == null) {
      this.fromColor = Color.LIGHT_GRAY;
    }
    if (this.toColor == null) {
      this.toColor = Color.WHITE;
    }
  }

  @Override
  public BufferedImage produce(int width, int height) {
    this.initialize();

    // RGB
    BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D g = img.createGraphics();

    RenderingHints hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g.setRenderingHints(hints);

    if (CaptchaUtils.RandomHolder.instance.nextBoolean()) {
      g.setPaint(new GradientPaint(0, 0, this.fromColor, width, height, this.toColor));
    } else {
      g.setPaint(new GradientPaint(0, 0, this.toColor, width, height, this.fromColor));
    }

    g.fill(new Rectangle2D.Double(0, 0, width, height));
    g.drawImage(img, 0, 0, null);

    g.dispose();
    return img;
  }

  public GradientBgProducer setFromColor(Color fromColor) {
    this.assertNotInitialized();
    this.fromColor = fromColor;
    return this;
  }

  public GradientBgProducer setToColor(Color toColor) {
    this.assertNotInitialized();
    this.toColor = toColor;
    return this;
  }
}