Convert Image to BufferedImage : BufferedImage « 2D Graphics GUI « Java

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Java » 2D Graphics GUI » BufferedImageScreenshots 
Convert Image to BufferedImage
  


//package modrcon;

import java.awt.image.*;
import java.awt.color.*;
import javax.swing.*;
import java.awt.*;
/**
 * Takes an image and returns the Gray scale copy of it. This class is static and
 * therefore cannot be instantiated. Proper usage is to call ImageGrayer.grayImage();
 @author izuriel
 */
public class ImageUtil {

    /**
     * Posted by alpha02 at http://www.dreamincode.net/code/snippet1076.htm
     */
    public static BufferedImage toBufferedImage(Image image) {
        if (image instanceof BufferedImage)
        return (BufferedImage)image;

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

        // Determine if the image has transparent pixels
        boolean hasAlpha = hasAlpha(image);

        // 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 == true)
                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) { } //No screen

        if (bimage == null) {
            // Create a buffered image using the default color model
            int type = BufferedImage.TYPE_INT_RGB;

            if (hasAlpha == true) {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, 00null);
        g.dispose();

        return bimage;
    }


    public static boolean hasAlpha(Image image) {
        // If buffered image, the color model is readily available
        if (image instanceof BufferedImage)
            return ((BufferedImage)image).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, 0011false);
        try {
            pg.grabPixels();
        catch (InterruptedException e) { }

        // Get the image's color model
        return pg.getColorModel().hasAlpha();
    }
}

   
    
  
Related examples in the same category
1.BufferImage based Label
2.Animated clipping of an image and shapes with alphaAnimated clipping of an image and shapes with alpha
3.Renders an ellipse overlapping a rectangle with the compositing rule and alpha value selected by the userRenders an ellipse overlapping a rectangle with the compositing rule and alpha value selected by the user
4.Image operationsImage operations
5.BufferedImage with Jumbled images
6.Save an image after operations
7.Create buffered image that does not support transparency
8.Create a buffered image that supports transparency
9.Display image after operation
10.Compositing is the combining of elements from separate sources into single images
11.Convert a non-RGB image to an RGB buffered image
12.Blurring a Buffered Image
13.Sharpening a Buffered Image
14.Converting a Colored Buffered Image to Gray
15.Get average of a set of images with WritableRaster
16.Creating a BufferedImage from an Image object
17.Create Headless BufferedImage
18.Constructs a BufferedImage with a linear sRGB colorModel, and alpha
19.Creates and returns a buffered version of the specified image.
20.Scale, convert images
21.Make Linear Buffered Image
22.Renders multiple paragraphs of text in an array to an image (created and returned).
23.Create and Draw BufferedImage
24.Draw centered BufferedImage
25.Desaturate BufferedImage
26.Converts an Image to a BufferedImage
27.store BufferedImage to file
28.store BufferedImage to file and then retrieve to BufferedImage
29.Returns a BufferedImage with the specified image type, where the graphical content is a copy of the specified image.
30.Draw code point
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