74 lines
2.8 KiB
Java
74 lines
2.8 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 4181172
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* @summary Confirm that solid white fill is not dithered on an 8-bit indexed surface.
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* The test draws two areas filled with white solid color.
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* The upper left square is filled in aliasing mode and
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* the lower right square is filled in anti-aliasing mode.
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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.RenderingHints;
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import java.awt.image.BufferedImage;
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public class DitheredSolidFill {
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public static void main(String args[]) {
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BufferedImage bi = new BufferedImage(120, 120, BufferedImage.TYPE_BYTE_INDEXED);
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Graphics2D g2D = bi.createGraphics();
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g2D.setColor(Color.black);
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g2D.fillRect(0, 0, 100, 100);
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g2D.setColor(Color.white);
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g2D.fillRect(5, 5, 40, 40);
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checkPixels(bi, 5, 5, 40, 40);
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g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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g2D.fillRect(55, 55, 40, 40);
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checkPixels(bi, 55, 55, 40, 40);
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}
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static void checkPixels(BufferedImage bi, int x, int y, int w, int h) {
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// pixel can be off white, but must be the same in all cases.
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int expectedPix = bi.getRGB(x, y);
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for (int x0 = x; x0 < x + w; x0++) {
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for (int y0 = y; y0 < y + h; y0++) {
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if (bi.getRGB(x0, y0) != expectedPix) {
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try {
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javax.imageio.ImageIO.write(bi, "png", new java.io.File("failed.png"));
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} catch (Exception e) {
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}
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throw new RuntimeException("Not expected pix : " +
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Integer.toHexString(bi.getRGB(x0, y0)) +
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" at " + x0 + "," + y0);
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}
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}
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}
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}
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}
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