67 lines
2.5 KiB
Java
67 lines
2.5 KiB
Java
/*
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* Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4203598
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* @summary This test verifies that an image with transparent background can be displayed
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* correctly with the red background color given.
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* The correct display should be the sleeping Duke on a red background.
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*
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*/
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import java.awt.Color;
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import java.awt.Graphics2D;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import javax.imageio.ImageIO;
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public class ImageRendering {
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public static void main(String[] args) throws Exception {
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String imgName = "snooze.gif";
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File file = new File(System.getProperty("test.src", "."), imgName);
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BufferedImage image = ImageIO.read(file);
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int w = image.getWidth();
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int h = image.getHeight();
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BufferedImage dest = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
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Graphics2D g2d = dest.createGraphics();
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g2d.drawImage(image, 0, 0, Color.red, null);
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int redPixel = Color.red.getRGB();
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for (int y = 0; y < h; y++) {
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for (int x = 0; x < w; x++) {
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int srcPixel = image.getRGB(x, y);
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if ((srcPixel & 0x0ff000000) == 0) {
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int destPix = dest.getRGB(x, y);
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if (destPix != redPixel) {
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throw new RuntimeException("Not red at x=" + x +
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" y=" + y +
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"pix = " + Integer.toHexString(destPix));
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}
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}
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}
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}
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}
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}
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