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Unittest for ByteAligned-Flag on CCITT Decoder

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This commit is contained in:
Oliver Schmidtmer 2017-08-07 17:10:53 +02:00
parent cce1c06296
commit d831b6aad8
1 changed files with 19 additions and 0 deletions
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19
imageio/imageio-tiff/src/test/java/com/twelvemonkeys/imageio/plugins/tiff/CCITTFaxDecoderStreamTest.java
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@ -74,6 +74,13 @@ public class CCITTFaxDecoderStreamTest {
// Line 4: V-1, V0, V0 EOL EOL
static final byte[] DATA_G4 = { 0x04, 0x17, (byte) 0xF5, (byte) 0x80, 0x08, 0x00, (byte) 0x80 };
static final byte[] DATA_G4_ALIGNED = {
0x04, 0x14, // 00000100 000101(00)
(byte) 0xE0, // 111 (00000)
(byte) 0xE0, // 111 (00000)
0x58 // 01011 (000)
};
// TODO: Better tests (full A4 width scan lines?)
// From http://www.mikekohn.net/file_formats/tiff.php
@ -261,4 +268,16 @@ public class CCITTFaxDecoderStreamTest {
byte decoded = (byte) inputStream.read();
assertEquals((byte) 0b10101010, decoded);
}
@Test
public void testDecodeType4ByteAligned() throws IOException {
CCITTFaxDecoderStream stream = new CCITTFaxDecoderStream(new ByteArrayInputStream(DATA_G4_ALIGNED), 6,
TIFFExtension.COMPRESSION_CCITT_T6, 1, 0L);
stream.setOptionByteAligned(true);
byte[] imageData = ((DataBufferByte) image.getData().getDataBuffer()).getData();
byte[] bytes = new byte[imageData.length];
new DataInputStream(stream).readFully(bytes);
assertArrayEquals(imageData, bytes);
}
}