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Work in progress: CCITT Encoder

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Schmidor
2015-10-08 00:38:31 +02:00
parent 8e11d95fd6
commit 39b92ab19f
2 changed files with 156 additions and 53 deletions
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imageio/imageio-tiff/src/test/java/com/twelvemonkeys/imageio/plugins/tiff/CCITTFaxEncoderStreamTest.java
+75 -4
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@@ -28,22 +28,51 @@
package com.twelvemonkeys.imageio.plugins.tiff;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.junit.Before;
import org.junit.Test;
import com.twelvemonkeys.imageio.plugins.tiff.CCITTFaxEncoderStream.Code;
import java.io.IOException;
import static org.junit.Assert.*;
/**
* CCITTFaxEncoderStreamTest
*
* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
* @author <a href="mailto:mail@schmidor.de">Oliver Schmidtmer</a>
* @author last modified by $Author$
* @version $Id$
*/
public class CCITTFaxEncoderStreamTest {
// Image should be (6 x 4):
// 1 1 1 0 1 1 x x
// 1 1 1 0 1 1 x x
// 1 1 1 0 1 1 x x
// 1 1 0 0 1 1 x x
BufferedImage image;
@Before
public void init() {
image = new BufferedImage(6, 4, BufferedImage.TYPE_BYTE_BINARY);
for (int y = 0; y < 4; y++) {
for (int x = 0; x < 6; x++) {
image.setRGB(x, y, x != 3 ? 0xff000000 : 0xffffffff);
}
}
image.setRGB(2, 3, 0xffffffff);
}
@Test
public void testBuildCodes() throws IOException {
assertTrue(CCITTFaxEncoderStream.WHITE_TERMINATING_CODES.length == 64);
@@ -63,4 +92,46 @@ public class CCITTFaxEncoderStreamTest {
assertNotNull(code);
}
}
@Test
public void testType2() throws IOException {
testImage(TIFFBaseline.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE, 1, 0L);
}
@Test
public void testType4() throws IOException {
testImage(TIFFExtension.COMPRESSION_CCITT_T4, 1, 0L);
testImage(TIFFExtension.COMPRESSION_CCITT_T4, 1, TIFFExtension.GROUP3OPT_FILLBITS);
testImage(TIFFExtension.COMPRESSION_CCITT_T4, 1, TIFFExtension.GROUP3OPT_2DENCODING);
testImage(TIFFExtension.COMPRESSION_CCITT_T4, 1,
TIFFExtension.GROUP3OPT_FILLBITS | TIFFExtension.GROUP3OPT_2DENCODING);
}
@Test
public void testType6() throws IOException {
testImage(TIFFExtension.COMPRESSION_CCITT_T6, 1, 0L);
}
@Test
public void restReversedFillOrder() throws IOException {
testImage(TIFFBaseline.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE, 2, 0L);
testImage(TIFFExtension.COMPRESSION_CCITT_T6, 2, 0L);
}
private void testImage(int type, int fillOrder, long options) throws IOException {
byte[] imageData = ((DataBufferByte) image.getData().getDataBuffer()).getData();
byte[] redecodedData = new byte[imageData.length];
ByteArrayOutputStream imageOutput = new ByteArrayOutputStream();
OutputStream outputSteam = new CCITTFaxEncoderStream(imageOutput, 6, type, fillOrder, options);
outputSteam.write(imageData);
outputSteam.close();
byte[] encodedData = imageOutput.toByteArray();
CCITTFaxDecoderStream inputStream = new CCITTFaxDecoderStream(new ByteArrayInputStream(encodedData), 6, type,
fillOrder, options);
new DataInputStream(inputStream).readFully(redecodedData);
inputStream.close();
assertArrayEquals(imageData, redecodedData);
}
}