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