80 lines
3.0 KiB
Java
Executable File
80 lines
3.0 KiB
Java
Executable File
package org.gcube.contentmanagement.graphtools.data.conversions;
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import java.awt.Graphics;
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import java.awt.GraphicsConfiguration;
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import java.awt.GraphicsDevice;
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import java.awt.GraphicsEnvironment;
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import java.awt.HeadlessException;
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import java.awt.Image;
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import java.awt.Toolkit;
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import java.awt.Transparency;
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import java.awt.image.BufferedImage;
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import java.awt.image.PixelGrabber;
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import javax.swing.ImageIcon;
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public class ImageTools {
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public static Image toImage(BufferedImage bufferedImage) {
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return Toolkit.getDefaultToolkit().createImage(bufferedImage.getSource());
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}
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public static BufferedImage toBufferedImage(Image image) {
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if (image instanceof BufferedImage) {return (BufferedImage)image;}
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// This code ensures that all the pixels in the image are loaded
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image = new ImageIcon(image).getImage();
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// Determine if the image has transparent pixels
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boolean hasAlpha = hasAlpha(image);
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// Create a buffered image with a format that's compatible with the screen
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BufferedImage bimage = null;
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GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
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try {
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// Determine the type of transparency of the new buffered image
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int transparency = Transparency.OPAQUE;
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if (hasAlpha == true) {transparency = Transparency.BITMASK;}
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// Create the buffered image
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GraphicsDevice gs = ge.getDefaultScreenDevice();
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GraphicsConfiguration gc = gs.getDefaultConfiguration();
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bimage = gc.createCompatibleImage(image.getWidth(null), image.getHeight(null), transparency);
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}
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catch (HeadlessException e) {} //No screen
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if (bimage == null) {
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// Create a buffered image using the default color model
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int type = BufferedImage.TYPE_INT_RGB;
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if (hasAlpha == true) {type = BufferedImage.TYPE_INT_ARGB;}
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bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
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}
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// Copy image to buffered image
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Graphics g = bimage.createGraphics();
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// Paint the image onto the buffered image
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g.drawImage(image, 0, 0, null);
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g.dispose();
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return bimage;
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}
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public static boolean hasAlpha(Image image) {
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// If buffered image, the color model is readily available
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if (image instanceof BufferedImage) {return ((BufferedImage)image).getColorModel().hasAlpha();}
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// Use a pixel grabber to retrieve the image's color model;
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// grabbing a single pixel is usually sufficient
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PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
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try {pg.grabPixels();} catch (InterruptedException e) {}
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// Get the image's color model
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return pg.getColorModel().hasAlpha();
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}
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}
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