/*
* Copyright ( c ) 2020 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Dialog;
import java.awt.FileDialog;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import static java.awt.image.BufferedImage.TYPE_INT_ARGB_PRE;
/**
* @ test
* @ key headful
* @ bug 8238276
* @ summary Verifies that create / prepare / checkImage work properly for FileDialog
*/
public final class ImageOperations {
public static void main(String[] args) throws Exception {
BufferedImage gold = new BufferedImage(255 , 255 , TYPE_INT_ARGB_PRE);
BufferedImage target = new BufferedImage(255 , 255 , TYPE_INT_ARGB_PRE);
fill(gold);
FileDialog fd = new FileDialog((Dialog) null );
fd.pack();
try {
Image image = fd.createImage(gold.getSource());
if (image == null ) {
throw new NullPointerException();
}
if (!fd.prepareImage(image, null )) {
Thread .sleep(100 );
}
if ((fd.checkImage(image, null ) & ImageObserver.ALLBITS) == 0 ) {
throw new RuntimeException("Image should be loaded already" );
}
Graphics2D graphics = (Graphics2D) target.getGraphics();
graphics.setComposite(AlphaComposite.Src);
graphics.drawImage(image, 0 , 0 , null );
graphics.dispose();
validate(gold, target);
} finally {
fd.dispose();
}
}
/**
* Fills the whole image using different alpha for each row .
*
* @ param image to fill
*/
private static void fill(Image image) {
Graphics2D graphics = (Graphics2D) image.getGraphics();
graphics.setComposite(AlphaComposite.Src);
graphics.setColor(Color.GREEN);
graphics.fillRect(0 , 0 , image.getWidth(null ), image.getHeight(null ));
for (int i = 0 ; i < 255 ; ++i) {
graphics.setColor(new Color(23 , 127 , 200 , i));
graphics.fillRect(0 , i, image.getWidth(null ), 1 );
}
graphics.dispose();
}
private static void validate(BufferedImage bi, BufferedImage goldbi)
throws IOException {
for (int x = 0 ; x < bi.getWidth(); ++x) {
for (int y = 0 ; y < bi.getHeight(); ++y) {
if (goldbi.getRGB(x, y) != bi.getRGB(x, y)) {
System.out.println("x = " + x);
System.out.println("y = " + y);
ImageIO.write(bi, "png" , new File("actual.png" ));
ImageIO.write(goldbi, "png" , new File("expected.png" ));
throw new RuntimeException("Test failed." );
}
}
}
}
}
Messung V0.5 in Prozent C=96 H=89 G=92
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-10-11)
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