1 /* 2 * Copyright (c) 2005, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6275211 6276621 27 * @summary Tests that GIF writer plugin is able to write indexed images if 28 * palette size is not a power of two 29 */ 30 31 import java.awt.Color; 32 import java.awt.Graphics2D; 33 import java.awt.image.BufferedImage; 34 import java.awt.image.IndexColorModel; 35 import java.io.ByteArrayOutputStream; 36 import java.io.IOException; 37 38 import javax.imageio.ImageIO; 39 import javax.imageio.ImageWriter; 40 import javax.imageio.stream.ImageOutputStream; 41 42 public class OddPaletteTest { 43 44 private static int w = 100; 45 private static int h = 100; 46 47 public static void main(String[] args) { 48 BufferedImage[] srcs = new BufferedImage[2]; 49 srcs[0] = createTestImage(7); // bug 6275211 50 srcs[1] = createTestImage(1); // bug 6276621 51 52 for (int i = 0; i < srcs.length; i++) { 53 doTest(srcs[i]); 54 } 55 } 56 57 private static void doTest(BufferedImage src) { 58 ImageWriter w = ImageIO.getImageWritersByFormatName("GIF").next(); 59 if (w == null) { 60 throw new RuntimeException("No writer available!"); 61 } 62 63 try { 64 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 65 ImageOutputStream ios = ImageIO.createImageOutputStream(baos); 66 w.setOutput(ios); 67 w.write(src); 68 } catch (IOException e) { 69 throw new RuntimeException("Test failed.", e); 70 } catch (IllegalArgumentException e) { 71 throw new RuntimeException("Test failed.", e); 72 } 73 } 74 75 private static BufferedImage createTestImage(int paletteSize) { 76 byte[] r = new byte[paletteSize]; 77 byte[] g = new byte[paletteSize]; 78 byte[] b = new byte[paletteSize]; 79 80 int shift = 256 / paletteSize; 81 for (int i = 0; i < paletteSize; i++) { 82 r[i] = g[i] = b[i] = (byte)(shift * i); 83 } 84 85 int numBits = getNumBits(paletteSize); 86 87 System.out.println("num of bits " + numBits); 88 89 IndexColorModel icm = 90 new IndexColorModel(numBits, paletteSize, r, g, b); 91 92 BufferedImage img = new BufferedImage(w, h, 93 BufferedImage.TYPE_BYTE_INDEXED, 94 icm); 95 Graphics2D g2d = img.createGraphics(); 96 g2d.setColor(Color.white); 97 g2d.fillRect(0, 0, w, h); 98 g2d.setColor(Color.black); 99 g2d.drawLine(0, 0, w, h); 100 g2d.drawLine(0, h, w, 0); 101 102 return img; 103 } 104 105 private static int getNumBits(int paletteSize) { 106 if (paletteSize < 0) { 107 throw new IllegalArgumentException("negative palette size: " + 108 paletteSize); 109 } 110 if (paletteSize < 2) { 111 return 1; 112 } 113 int numBits = 0; 114 115 paletteSize--; 116 117 while (paletteSize > 0) { 118 numBits++; 119 paletteSize = paletteSize >> 1; 120 } 121 return numBits; 122 } 123 }