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/*
* Copyright (c) 2012, 2018, 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.Color;
import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import java.awt.image.VolatileImage;
/**
* @test
* @key headful
* @bug 7181438 8198613
* @summary Verifies that we get correct alpha, when we draw opaque
* BufferedImage to non opaque VolatileImage via intermediate opaque texture.
* @author Sergey Bylokhov
* @run main/othervm -Dsun.java2d.accthreshold=0 bug7181438
*/
public final class bug7181438 {
private static final int SIZE = 500;
public static void main(final String[] args) {
final BufferedImage bi = createBufferedImage();
final VolatileImage vi = createVolatileImage();
final Graphics s2dVi = vi.getGraphics();
//sw->texture->surface blit
s2dVi.drawImage(bi, 0, 0, null);
final BufferedImage results = vi.getSnapshot();
for (int i = 0; i < SIZE; ++i) {
for (int j = 0; j < SIZE; ++j) {
//Image should be opaque: (black color and alpha = 255)
if (results.getRGB(i, j) != 0xFF000000) {
throw new RuntimeException("Failed: Wrong alpha");
}
}
}
System.out.println("Passed");
}
private static VolatileImage createVolatileImage() {
final GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
final GraphicsConfiguration gc = ge.getDefaultScreenDevice().getDefaultConfiguration();
return gc.createCompatibleVolatileImage(SIZE, SIZE,
Transparency.TRANSLUCENT);
}
private static BufferedImage createBufferedImage() {
final BufferedImage bi = new BufferedImage(SIZE, SIZE,
BufferedImage.TYPE_INT_RGB);
final Graphics bg = bi.getGraphics();
//Black color and alpha = 0
bg.setColor(new Color(0, 0, 0, 0));
bg.fillRect(0, 0, SIZE, SIZE);
bg.dispose();
return bi;
}
}
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