124 lines
3.9 KiB
Java
124 lines
3.9 KiB
Java
/*
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* Copyright (c) 2005, 2017, 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 6275211 6276621
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* @summary Tests that GIF writer plugin is able to write indexed images if
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* palette size is not a power of two
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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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import java.awt.image.IndexColorModel;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageWriter;
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import javax.imageio.stream.ImageOutputStream;
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public class OddPaletteTest {
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private static int w = 100;
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private static int h = 100;
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public static void main(String[] args) {
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BufferedImage[] srcs = new BufferedImage[2];
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srcs[0] = createTestImage(7); // bug 6275211
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srcs[1] = createTestImage(1); // bug 6276621
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for (int i = 0; i < srcs.length; i++) {
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doTest(srcs[i]);
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}
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}
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private static void doTest(BufferedImage src) {
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ImageWriter w = ImageIO.getImageWritersByFormatName("GIF").next();
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if (w == null) {
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throw new RuntimeException("No writer available!");
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}
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try {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
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w.setOutput(ios);
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w.write(src);
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} catch (IOException e) {
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throw new RuntimeException("Test failed.", e);
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} catch (IllegalArgumentException e) {
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throw new RuntimeException("Test failed.", e);
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}
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}
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private static BufferedImage createTestImage(int paletteSize) {
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byte[] r = new byte[paletteSize];
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byte[] g = new byte[paletteSize];
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byte[] b = new byte[paletteSize];
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int shift = 256 / paletteSize;
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for (int i = 0; i < paletteSize; i++) {
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r[i] = g[i] = b[i] = (byte)(shift * i);
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}
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int numBits = getNumBits(paletteSize);
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System.out.println("num of bits " + numBits);
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IndexColorModel icm =
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new IndexColorModel(numBits, paletteSize, r, g, b);
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BufferedImage img = new BufferedImage(w, h,
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BufferedImage.TYPE_BYTE_INDEXED,
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icm);
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Graphics2D g2d = img.createGraphics();
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g2d.setColor(Color.white);
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g2d.fillRect(0, 0, w, h);
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g2d.setColor(Color.black);
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g2d.drawLine(0, 0, w, h);
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g2d.drawLine(0, h, w, 0);
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return img;
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}
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private static int getNumBits(int paletteSize) {
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if (paletteSize < 0) {
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throw new IllegalArgumentException("negative palette size: " +
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paletteSize);
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}
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if (paletteSize < 2) {
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return 1;
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}
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int numBits = 0;
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paletteSize--;
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while (paletteSize > 0) {
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numBits++;
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paletteSize = paletteSize >> 1;
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}
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return numBits;
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}
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}
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