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/*
* Copyright (c) 1999, 2024, 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.
*/
/*
* @test
* @bug 4203598
* @summary This test verifies that an image with transparent background can be displayed
* correctly with the red background color given.
* The correct display should be the sleeping Duke on a red background.
*
*/
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
public class ImageRendering {
public static void main(String[] args) throws Exception {
String imgName = "snooze.gif";
File file = new File(System.getProperty("test.src", "."), imgName);
BufferedImage image = ImageIO.read(file);
int w = image.getWidth();
int h = image.getHeight();
BufferedImage dest = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = dest.createGraphics();
g2d.drawImage(image, 0, 0, Color.red, null);
int redPixel = Color.red.getRGB();
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
int srcPixel = image.getRGB(x, y);
if ((srcPixel & 0x0ff000000) == 0) {
int destPix = dest.getRGB(x, y);
if (destPix != redPixel) {
throw new RuntimeException("Not red at x=" + x +
" y=" + y +
"pix = " + Integer.toHexString(destPix));
}
}
}
}
}
}
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