| /* |
| * Copyright (c) 2016, 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.AlphaComposite; |
| import java.awt.BasicStroke; |
| import java.awt.Color; |
| import java.awt.Graphics2D; |
| import java.awt.Rectangle; |
| import java.awt.geom.Area; |
| import java.awt.image.BufferedImage; |
| import java.io.File; |
| |
| import javax.imageio.ImageIO; |
| |
| import static java.awt.RenderingHints.KEY_STROKE_CONTROL; |
| import static java.awt.RenderingHints.VALUE_STROKE_PURE; |
| import static java.awt.image.BufferedImage.TYPE_INT_ARGB; |
| |
| /** |
| * @test |
| * @key headful |
| * @bug 8167310 |
| * @summary The clip should be correct if the scale is fractional |
| */ |
| public final class IncorrectFractionalClip { |
| |
| private static final int SIZE = 128; |
| |
| public static final Color RED = new Color(255, 0, 0, 100); |
| |
| public static final Color GREEN = new Color(0, 255, 0, 100); |
| |
| public static final Color WHITE = new Color(0, 0, 0, 0); |
| |
| public static final BasicStroke STROKE = new BasicStroke(2.01f); |
| |
| private static final double[] SCALES = { |
| 0.1, 0.25, 0.4, 0.5, 0.6, 1, 1.4, 1.5, 1.6, 2.0, 2.4, 2.5, 2.6, 4 |
| }; |
| |
| static BufferedImage bi; |
| |
| static BufferedImage gold; |
| |
| static BufferedImage redI; |
| |
| static BufferedImage greenI; |
| |
| public static void main(final String[] args) throws Exception { |
| bi = new BufferedImage(SIZE, SIZE, TYPE_INT_ARGB); |
| gold = new BufferedImage(SIZE, SIZE, TYPE_INT_ARGB); |
| redI = createImage(RED); |
| greenI = createImage(GREEN); |
| |
| System.out.println("Will test fillRect"); |
| test(0, true); |
| test(0, false); |
| System.out.println("Will test DrawImage"); |
| test(1, true); |
| test(1, false); |
| System.out.println("Will test drawLine"); |
| test(2, true); |
| test(2, false); |
| } |
| |
| /** |
| * This method draws/fills a number of rectangle, images and lines. Each |
| * time the clip is set as one vertical/horizontal line. The resulted image |
| * should not have any overlapping of different colors. The clip is set via |
| * rectangle(test) and via shape(gold). Both images should be identical. |
| */ |
| private static void test(final int testId, final boolean horiz) |
| throws Exception { |
| for (final double scale : SCALES) { |
| // Initialize the test and gold images |
| drawToImage(testId, horiz, scale, bi, /* Rectangle */ false); |
| drawToImage(testId, horiz, scale, gold, /* Shape */ true); |
| validate(bi, gold, testId); |
| } |
| } |
| |
| private static void drawToImage(int testId, boolean horiz, double scale, |
| BufferedImage image, boolean shape) { |
| Graphics2D g = image.createGraphics(); |
| g.setComposite(AlphaComposite.Src); |
| g.setColor(WHITE); |
| g.fillRect(0, 0, bi.getWidth(), bi.getHeight()); |
| g.setComposite(AlphaComposite.SrcOver); |
| g.setRenderingHint(KEY_STROKE_CONTROL, VALUE_STROKE_PURE); |
| |
| // set the scale in one direction |
| if (horiz) { |
| g.scale(scale, 1); |
| } else { |
| g.scale(1, scale); |
| } |
| // cover all units in the user space to touch all pixels in the |
| // image after transform |
| final int destSize = (int) Math.ceil(SIZE / scale); |
| final int destW; |
| final int destH; |
| if (horiz) { |
| destW = destSize; |
| destH = SIZE; |
| } else { |
| destW = SIZE; |
| destH = destSize; |
| } |
| for (int step = 0; step < destSize; ++step) { |
| if (horiz) { |
| if (!shape) { |
| g.setClip(step, 0, 1, SIZE); |
| } else{ |
| g.setClip(new Area(new Rectangle(step, 0, 1, SIZE))); |
| } |
| } else { |
| if (!shape) { |
| g.setClip(0, step, SIZE, 1); |
| }else{ |
| g.setClip(new Area(new Rectangle(0, step, SIZE, 1))); |
| } |
| } |
| switch (testId) { |
| case 0: |
| g.setColor(step % 2 == 0 ? RED : GREEN); |
| g.fillRect(0, 0, destW, destH); |
| break; |
| case 1: |
| g.drawImage(step % 2 == 0 ? redI : greenI, 0, 0, |
| destW, destH, null); |
| break; |
| case 2: |
| g.setColor(step % 2 == 0 ? RED : GREEN); |
| g.setStroke(STROKE); |
| if (horiz) { |
| g.drawLine(step, 0, step, SIZE); |
| } else { |
| g.drawLine(0, step, SIZE, step); |
| } |
| break; |
| default: |
| throw new RuntimeException(); |
| } |
| } |
| g.dispose(); |
| } |
| |
| private static void validate(final BufferedImage bi, BufferedImage gold, |
| final int testID) throws Exception { |
| for (int x = 0; x < SIZE; ++x) { |
| for (int y = 0; y < SIZE; ++y) { |
| int rgb = bi.getRGB(x, y); |
| int goldRGB = gold.getRGB(x, y); |
| if ((rgb != GREEN.getRGB() && rgb != RED.getRGB()) |
| || rgb != goldRGB) { |
| ImageIO.write(bi, "png", new File("image.png")); |
| ImageIO.write(gold, "png", new File("gold.png")); |
| throw new RuntimeException("Test failed."); |
| } |
| } |
| } |
| } |
| |
| private static BufferedImage createImage(final Color color) { |
| BufferedImage bi = new BufferedImage(SIZE, SIZE, TYPE_INT_ARGB); |
| Graphics2D g = bi.createGraphics(); |
| g.setComposite(AlphaComposite.Src); |
| g.setColor(color); |
| g.fillRect(0, 0, bi.getWidth(), bi.getHeight()); |
| g.dispose(); |
| return bi; |
| } |
| } |