Java Image to BufferedImage makeRGBABufferedImageFromImage( Image image)

Description

make RGBA Buffered Image From Image

License

Apache License

Declaration

protected static BufferedImage makeRGBABufferedImageFromImage(
            Image image) 

Method Source Code

//package com.java2s;
/*//  www  . j a  v a2s . c  om
 * Copyright 2006-2014 ICEsoft Technologies Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an "AS
 * IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

import javax.swing.*;
import java.awt.*;

import java.awt.image.*;

public class Main {
    protected static BufferedImage makeRGBABufferedImageFromImage(
            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; for this method's
        // implementation, see Determining If an Image Has Transparent Pixels
        boolean hasAlpha = hasAlpha(image);
        // Create a buffered image with a format that's compatible with the screen
        BufferedImage bImage = null;
        try {
            // graphics environment calls can through headless exceptions so
            // proceed with caution.
            GraphicsEnvironment ge = GraphicsEnvironment
                    .getLocalGraphicsEnvironment();
            GraphicsDevice gs = ge.getDefaultScreenDevice();
            GraphicsConfiguration gc = gs.getDefaultConfiguration();
            // Determine the type of transparency of the new buffered image
            int transparency = Transparency.OPAQUE;
            if (hasAlpha) {
                transparency = Transparency.BITMASK;
            }
            // Create the buffered image
            int width = image.getWidth(null);
            int height = image.getHeight(null);
            if (width == -1 || height == -1) {
                return null;
            }
            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;
            if (hasAlpha) {
                type = BufferedImage.TYPE_INT_ARGB;
            }
            int width = image.getWidth(null);
            int height = image.getHeight(null);
            if (width == -1 || height == -1) {
                return null;
            }
            bImage = new BufferedImage(width, height, 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();
        image.flush();
        return bImage;
    }

    public static boolean hasAlpha(Image image) {
        // If buffered image, the color model is readily available
        if (image instanceof BufferedImage) {
            BufferedImage bufferedImage = (BufferedImage) image;
            return bufferedImage.getColorModel().hasAlpha();
        }
        // Use a pixel grabber to retrieve the image's color model;
        // grabbing a single pixel is usually sufficient
        PixelGrabber pixelGrabber = new PixelGrabber(image, 0, 0, 1, 1,
                false);
        try {
            pixelGrabber.grabPixels();
        } catch (InterruptedException e) {
            // fail quietly
        }
        // Get the image's color model
        ColorModel cm = pixelGrabber.getColorModel();
        return cm == null || cm.hasAlpha();
    }
}

Related

1. imageToBufferedImage(Image pImage)
2. imageToBufferedImage(Image src)
3. makeBufferedImage(final Image image)
4. makeBufferedImage(Image image)
5. makeBufferedImage(Image image)
6. toBufferedImage(Image i)
7. toBufferedImage(Image image)
8. toBufferedImage(Image image)
9. toBufferedImage(Image image)