Create Gradient Mask : BufferedImage « 2D Graphics « Java Tutorial

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Java Tutorial » 2D Graphics » BufferedImage 
16. 27. 27. Create Gradient Mask
/*
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import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.GraphicsEnvironment;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;

import javax.swing.SwingConstants;

/**
 
 @author aim
 */
public class Utils {
  public static BufferedImage createGradientMask(int width, int height, int orientation) {
    // algorithm derived from Romain Guy's blog
    BufferedImage gradient = new BufferedImage(width, height,
            BufferedImage.TYPE_INT_ARGB);
    Graphics2D g = gradient.createGraphics();
    GradientPaint paint = new GradientPaint(0.0f0.0f,
            new Color(1.0f1.0f1.0f1.0f),
            orientation == SwingConstants.HORIZONTAL? width : 0.0f
            orientation == SwingConstants.VERTICAL? height : 0.0f,
            new Color(1.0f1.0f1.0f0.0f));
    g.setPaint(paint);
    g.fill(new Rectangle2D.Double(00, width, height));

    g.dispose();
    gradient.flush();

    return gradient;
}
}
16. 27. BufferedImage
16. 27. 1. Create BufferredImage with colors based on integer array
16. 27. 2. Creating a BufferedImage from an Image object
16. 27. 3. A buffered image is a type of image whose pixels can be modified.
16. 27. 4. BufferedImage.TYPE_INT_RGB
16. 27. 5. TYPE_INT_RGB and TYPE_INT_ARGB are typically used
16. 27. 6. Create buffered image that does not support transparency
16. 27. 7. Create a buffered image that supports transparency
16. 27. 8. Create an image that does not support transparency
16. 27. 9. Create an image that supports transparent pixels
16. 27. 10. Create an image that supports arbitrary levels of transparency
16. 27. 11. Creating a buffered image using Component.createImage().
16. 27. 12. Creating a Buffered Image from an Image
16. 27. 13. Drawing on a Buffered Image
16. 27. 14. If the buffered image supports transparency
16. 27. 15. Converting a Buffered Image (BufferedImage) from an Image
16. 27. 16. Getting and Setting Pixels in a Buffered Image
16. 27. 17. Scaling a Buffered Image
16. 27. 18. Shearing a Buffered Image
16. 27. 19. Translating a Buffered Image
16. 27. 20. Rotating a Buffered Image
16. 27. 21. Flipping a Buffered Image
16. 27. 22. Flip the image horizontally
16. 27. 23. Flip the image vertically and horizontally, equivalent to rotating the image 180 degrees
16. 27. 24. Converting a Colored Buffered Image to Gray
16. 27. 25. Creating a Image Zoomer using Graphics2D
16. 27. 26. Create Gradient Image
16. 27. 27. Create Gradient Mask
16. 27. 28. Create Headless BufferedImage
16. 27. 29. Create Translucent Image
16. 27. 30. If the image has transparent pixels
16. 27. 31. Produces a copy of the supplied image
16. 27. 32. Produces a resized image that is of the given dimensions
16. 27. 33. Creates and returns a buffered version of the specified image.
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