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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 4181172
* @summary Confirm that solid white fill is not dithered on an 8-bit indexed surface.
* The test draws two areas filled with white solid color.
* The upper left square is filled in aliasing mode and
* the lower right square is filled in anti-aliasing mode.
*/
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
public class DitheredSolidFill {
public static void main(String args[]) {
BufferedImage bi = new BufferedImage(120, 120, BufferedImage.TYPE_BYTE_INDEXED);
Graphics2D g2D = bi.createGraphics();
g2D.setColor(Color.black);
g2D.fillRect(0, 0, 100, 100);
g2D.setColor(Color.white);
g2D.fillRect(5, 5, 40, 40);
checkPixels(bi, 5, 5, 40, 40);
g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2D.fillRect(55, 55, 40, 40);
checkPixels(bi, 55, 55, 40, 40);
}
static void checkPixels(BufferedImage bi, int x, int y, int w, int h) {
// pixel can be off white, but must be the same in all cases.
int expectedPix = bi.getRGB(x, y);
for (int x0 = x; x0 < x + w; x0++) {
for (int y0 = y; y0 < y + h; y0++) {
if (bi.getRGB(x0, y0) != expectedPix) {
try {
javax.imageio.ImageIO.write(bi, "png", new java.io.File("failed.png"));
} catch (Exception e) {
}
throw new RuntimeException("Not expected pix : " +
Integer.toHexString(bi.getRGB(x0, y0)) +
" at " + x0 + "," + y0);
}
}
}
}
}
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