Java Image to BufferedImage toBufferedImage(Image image)

Description

to Buffered Image

License

Open Source License

Declaration

public static BufferedImage toBufferedImage(Image image) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.awt.Image;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;

public class Main {
    public static BufferedImage toBufferedImage(Image image) {
        if (image instanceof BufferedImage) {
            return (BufferedImage) image;
        }/*ww  w  . j a v a2s.  com*/

        // This code ensures that all the pixels in the image are loaded
        image = new ImageIcon(image).getImage();

        // Determine if the image has transparent pixels; for this method's
        // implementation, see e661 Determining If an Image Has Transparent Pixels
        boolean hasAlpha = hasAlpha(image);

        //boolean hasAlpha = false;

        // Create a buffered image with a format that's compatible with the screen
        BufferedImage bimage = null;
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        try {
            // Determine the type of transparency of the new buffered image
            int transparency = Transparency.OPAQUE;
            if (hasAlpha) {
                transparency = Transparency.BITMASK;
            }

            // Create the buffered image
            GraphicsDevice gs = ge.getDefaultScreenDevice();
            GraphicsConfiguration gc = gs.getDefaultConfiguration();
            bimage = gc.createCompatibleImage(image.getWidth(null), image.getHeight(null), transparency);
        } catch (HeadlessException e) {
            // The system does not have a screen
        }

        if (bimage == null) {
            // Create a buffered image using the default color model
            //            int type = BufferedImage.TYPE_INT_RGB;
            int type = BufferedImage.TYPE_BYTE_BINARY;
            if (hasAlpha) {
                type = BufferedImage.TYPE_INT_ARGB;
            }
            bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
        }

        // Copy image to buffered image
        Graphics g = bimage.createGraphics();

        // Paint the image onto the buffered image
        g.drawImage(image, 0, 0, null);
        g.dispose();

        return bimage;
    }

    public static boolean hasAlpha(Image image) {
        // If buffered image, the color model is readily available

        return false;

        //        if (image instanceof BufferedImage) {
        //            BufferedImage bimage = (BufferedImage) image;
        //            return bimage.getColorModel().hasAlpha();
        //        }
        //
        //        // Use a pixel grabber to retrieve the image's color model;
        //        // grabbing a single pixel is usually sufficient
        //        PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
        //        try {
        //            pg.grabPixels();
        //        } catch (InterruptedException e) {
        //        }
        //
        //        // Get the image's color model
        //        ColorModel cm = pg.getColorModel();
        //        return cm.hasAlpha();
    }
}

Related

1. toBufferedImage(Image image)
2. toBufferedImage(Image image)
3. toBufferedImage(Image image)
4. toBufferedImage(Image image)
5. toBufferedImage(Image image)
6. toBufferedImage(Image image)
7. toBufferedImage(Image image)
8. toBufferedImage(Image image)
9. toBufferedImage(Image image, int type)