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TIFF Fax option byte aligned now constructor parameter. Made all option fields final.

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This commit is contained in:
Harald Kuhr 2018-01-17 13:58:55 +01:00
parent 6936e7cbb2
commit b3b06dff4a
2 changed files with 50 additions and 24 deletions
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71
imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/CCITTFaxDecoderStream.java
View File

@ -50,13 +50,19 @@ final class CCITTFaxDecoderStream extends FilterInputStream {
private final int columns;
private final byte[] decodedRow;
private int decodedLength;
private int decodedPos;
private final boolean optionG32D;
// Leading zeros for aligning EOL
private final boolean optionG3Fill;
private final boolean optionUncompressed;
private final boolean optionByteAligned;
// Need to take fill order into account (?) (use flip table?)
private final int fillOrder;
private final int type;
private int decodedLength;
private int decodedPos;
private int[] changesReferenceRow;
private int[] changesCurrentRow;
private int changesReferenceRowCount;
@ -64,22 +70,24 @@ final class CCITTFaxDecoderStream extends FilterInputStream {
private int lastChangingElement = 0;
private boolean optionG32D = false;
@SuppressWarnings("unused") // Leading zeros for aligning EOL
private boolean optionG3Fill = false;
private boolean optionUncompressed = false;
private boolean optionByteAligned = false;
/**
* Creates a CCITTFaxDecoderStream.
* This is used for CCITT streams from PDF files, which use EncodedByteAlign.
*
* @param stream the compressed CCITT stream.
* @param columns the number of columns in the stream.
* @param type the type of stream, must be one of {@code COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE},
* {@code COMPRESSION_CCITT_T4} or {@code COMPRESSION_CCITT_T6}.
* @param fillOrder fillOrder, must be {@code FILL_LEFT_TO_RIGHT} or
* {@code FILL_RIGHT_TO_LEFT}.
* @param options CCITT T.4 or T.6 options.
* @param byteAligned enable byte alignment used in PDF files (EncodedByteAlign).
*/
public CCITTFaxDecoderStream(final InputStream stream, final int columns, final int type, final int fillOrder,
final long options) {
final long options, final boolean byteAligned) {
super(Validate.notNull(stream, "stream"));
this.columns = Validate.isTrue(columns > 0, columns, "width must be greater than 0");
// We know this is only used for b/w (1 bit)
this.decodedRow = new byte[(columns + 7) / 8];
this.type = Validate.isTrue(
type == TIFFBaseline.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE ||
type == TIFFExtension.COMPRESSION_CCITT_T4 || type == TIFFExtension.COMPRESSION_CCITT_T6,
@ -90,21 +98,33 @@ final class CCITTFaxDecoderStream extends FilterInputStream {
fillOrder, "Expected fill order 1 or 2: %s"
);
this.changesReferenceRow = new int[columns + 2];
this.changesCurrentRow = new int[columns + 2];
// We know this is only used for b/w (1 bit)
decodedRow = new byte[(columns + 7) / 8];
changesReferenceRow = new int[columns + 2];
changesCurrentRow = new int[columns + 2];
switch (type) {
case TIFFBaseline.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE:
optionByteAligned = true;
optionG32D = false;
optionG3Fill = false;
optionUncompressed = false;
break;
case TIFFExtension.COMPRESSION_CCITT_T4:
optionByteAligned = byteAligned;
optionG32D = (options & TIFFExtension.GROUP3OPT_2DENCODING) != 0;
optionG3Fill = (options & TIFFExtension.GROUP3OPT_FILLBITS) != 0;
optionUncompressed = (options & TIFFExtension.GROUP3OPT_UNCOMPRESSED) != 0;
break;
case TIFFExtension.COMPRESSION_CCITT_T6:
optionByteAligned = byteAligned;
optionG32D = false;
optionG3Fill = false;
optionUncompressed = (options & TIFFExtension.GROUP4OPT_UNCOMPRESSED) != 0;
break;
default:
// Guarded above
throw new AssertionError();
}
Validate.isTrue(!optionUncompressed, optionUncompressed,
@ -112,12 +132,19 @@ final class CCITTFaxDecoderStream extends FilterInputStream {
}
/**
* This is used for CCITT streams from PDF files, which use EncodedByteAlign
* Creates a CCITTFaxDecoderStream.
*
* @param enable enable byte alignment
* @param stream the compressed CCITT stream.
* @param columns the number of columns in the stream.
* @param type the type of stream, must be one of {@code COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE},
* {@code COMPRESSION_CCITT_T4} or {@code COMPRESSION_CCITT_T6}.
* @param fillOrder fillOrder, must be {@code FILL_LEFT_TO_RIGHT} or
* {@code FILL_RIGHT_TO_LEFT}.
* @param options CCITT T.4 or T.6 options.
*/
public void setOptionByteAligned(boolean enable) {
optionByteAligned = enable;
public CCITTFaxDecoderStream(final InputStream stream, final int columns, final int type, final int fillOrder,
final long options) {
this(stream, columns, type, fillOrder, options, false);
}
private void fetch() throws IOException {
@ -133,8 +160,8 @@ final class CCITTFaxDecoderStream extends FilterInputStream {
throw e;
}
// ..otherwise, just client code trying to read past the end of
// stream
// ..otherwise, just let client code try to read past the
// end of stream
decodedLength = -1;
}

3
imageio/imageio-tiff/src/test/java/com/twelvemonkeys/imageio/plugins/tiff/CCITTFaxDecoderStreamTest.java
View File

@ -272,8 +272,7 @@ public class CCITTFaxDecoderStreamTest {
@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);
TIFFExtension.COMPRESSION_CCITT_T6, 1, 0L, true);
byte[] imageData = ((DataBufferByte) image.getData().getDataBuffer()).getData();
byte[] bytes = new byte[imageData.length];