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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 6332480
* @summary Test verifies that images encoded as BMP with RLE4 or RLE8
* compression type are read correctly
*/
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.image.IndexColorModel;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
public class RLECompressionTest {
public static final int TEST_RLE8 = 0x01;
public static final int TEST_RLE4 = 0x02;
private static Color[] usedColors = new Color[] {
Color.black, Color.white, Color.red,
Color.green, Color.blue, Color.yellow };
int w = 100;
// NB: problem occurs when image height > width
// The problem manifestation is that only first w
// lines of image are filled by decoded data,
// rest of image (all lines below (w-1)-th line)
// is leaved uninitialized (black).
// In order to verify that this problem is solved,
// we use image with height > width.
int h = 2 * w;
private IndexColorModel getTestColorModel(int type) {
IndexColorModel icm = null;
int bpp = 8;
int size = 256;
switch(type) {
case TEST_RLE8:
bpp = 8;
size = 256;
break;
case TEST_RLE4:
bpp = 4;
size = 16;
break;
default:
throw new IllegalArgumentException("Wrong test type: " + type);
}
byte[] palette = new byte[size * 3];
for (int i = 0; i < usedColors.length; i++) {
palette[3 * i] = (byte)(0xff & usedColors[i].getRed());
palette[3 * i + 1] = (byte)(0xff & usedColors[i].getGreen());
palette[3 * i + 2] = (byte)(0xff & usedColors[i].getBlue());
}
// rest of palette is black
icm = new IndexColorModel(bpp, size, palette, 0, false);
return icm;
}
private BufferedImage getTestImage(int type) {
BufferedImage src = null;
IndexColorModel icm = getTestColorModel(type);
src = new BufferedImage(w, h, BufferedImage.TYPE_BYTE_INDEXED, icm);
Graphics2D g = src.createGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, w, h);
g.dispose();
return src;
}
public void doTest(int type) throws IOException {
BufferedImage src = getTestImage(type);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
ImageWriter writer = ImageIO.getImageWritersByFormatName("BMP").next();
writer.setOutput(ios);
ImageWriteParam wparam = writer.getDefaultWriteParam();
wparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
switch(type) {
case TEST_RLE8:
wparam.setCompressionType("BI_RLE8");
break;
case TEST_RLE4:
wparam.setCompressionType("BI_RLE4");
break;
default:
throw new IllegalArgumentException("Wrong test type: " + type);
}
writer.write(null, new IIOImage(src, null, null), wparam);
ios.close();
baos.close();
// read result
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
BufferedImage dst = ImageIO.read(bais);
checkResult(src, dst);
}
private void checkResult(BufferedImage src, BufferedImage dst) {
int x = w / 2;
for (int y = 0; y < h; y++) {
int srcRgb = src.getRGB(x, y);
int dstRgb = dst.getRGB(x, y);
if (srcRgb != dstRgb) {
throw new RuntimeException("Test failed due to color difference: " +
Integer.toHexString(dstRgb) + " instead of " + Integer.toHexString(srcRgb) +
" at [" + x + ", " + y + "]");
}
}
}
public static void main(String[] args) throws IOException {
RLECompressionTest test = new RLECompressionTest();
test.doTest(TEST_RLE8);
test.doTest(TEST_RLE4);
}
}
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