84 lines
2.7 KiB
Java
84 lines
2.7 KiB
Java
/*
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* Copyright (c) 2022, 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 8280964
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* @summary Tests that drawing to a ByteIndexed image dithers correctly.
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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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public class ByteIndexedDitherTest {
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public static void main(String[] args) {
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BufferedImage bgr = createBGRImage();
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BufferedImage indexed = createIndexedImage(bgr);
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checkImage(indexed);
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}
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static BufferedImage createBGRImage() {
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int sz = 8;
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BufferedImage img;
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img = new BufferedImage(sz, sz, BufferedImage.TYPE_3BYTE_BGR);
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Graphics2D g = img.createGraphics();
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Color c = new Color(0, 0, 254);
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g.setColor(c);
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g.fillRect(0, 0, sz, sz);
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g.dispose();
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return img;
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}
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static BufferedImage createIndexedImage(BufferedImage srcImage) {
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int w = srcImage.getWidth(null);
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int h = srcImage.getHeight(null);
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BufferedImage
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indexedImg = new BufferedImage(w, h, BufferedImage.TYPE_BYTE_INDEXED);
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Graphics2D g = indexedImg.createGraphics();
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g.drawImage(srcImage, 0, 0, w, h, null);
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g.dispose();
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return indexedImg;
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}
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static void checkImage(BufferedImage image) {
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int wid = image.getWidth();
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int hgt = image.getHeight();
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for (int y=0; y<hgt; y++) {
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for (int x=0; x<wid; x++) {
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int v = image.getRGB(x, y);
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if ((v & 0x00ffff00) != 0) {
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System.err.println("("+x+","+y+") = " +
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Integer.toHexString(v));
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throw new RuntimeException("Unexpected Red or Green");
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}
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}
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}
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}
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}
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