Java Code Examples for javax.imageio.stream.ImageOutputStream#mark()

The following examples show how to use javax.imageio.stream.ImageOutputStream#mark() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: ChannelImageOutputStreamTest.java    From sis with Apache License 2.0 6 votes vote down vote up 
/**
 * Tests {@link ChannelImageOutputStream#mark()} and {@code reset()} methods.
 *
 * @throws IOException should never happen since we read and write in memory only.
 */
@Test
public void testMarkAndReset() throws IOException {
    initialize("testMarkAndReset", STREAM_LENGTH, 1000); // We need a larger buffer for this test.
    final ImageOutputStream referenceStream = (ImageOutputStream) this.referenceStream;
    /*
     * Fill both streams with random data.
     * During this process, randomly takes mark.
     */
    int nbMarks = 0;
    for (int i=0; i<STREAM_LENGTH; i++) {
        if (randomEvent() && i < STREAM_LENGTH - Long.BYTES) {
            referenceStream.mark();
            testedStream.mark();
            nbMarks++;
        }
        final int v = random.nextInt(256);
        referenceStream.writeByte(v);
        testedStream.writeByte(v);
    }
    compareMarks(nbMarks);
}
Example 2
Source File: ChannelImageOutputStreamTest.java    From sis with Apache License 2.0 5 votes vote down vote up 
/**
 * Tests {@link ChannelImageOutputStream#flushBefore(long)}.
 *
 * @throws IOException should never happen since we read and write in memory only.
 */
@Test
@DependsOnMethod("testMarkAndReset")
public void testFlushBefore() throws IOException {
    final int N = 50; // Number of long values to write.
    initialize("testFlushBefore", N*Long.BYTES, 200);
    final ImageOutputStream referenceStream = (ImageOutputStream) this.referenceStream;
    for (int i=0; i<N; i++) {
        switch (i) {
            case 20:
            case 30:
            case 40:
            case 45: {
                referenceStream.mark();
                testedStream.mark();
                break;
            }
            case 10: {
                referenceStream.flushBefore(5 * Long.BYTES);
                testedStream.flushBefore(5 * Long.BYTES);
                break;
            }
            case 35: {
                referenceStream.flushBefore(32 * Long.BYTES);
                testedStream.flushBefore(32 * Long.BYTES);
                break;
            }
        }
        final long v = random.nextLong();
        referenceStream.writeLong(v);
        testedStream.writeLong(v);
    }
    compareMarks(2);
}
Example 3
Source File: TIFFIFD.java    From Bytecoder with Apache License 2.0 4 votes vote down vote up 
public void writeToStream(ImageOutputStream stream)
    throws IOException {

    int numFields = getNumTIFFFields();
    stream.writeShort(numFields);

    long nextSpace = stream.getStreamPosition() + 12*numFields + 4;

    Iterator<TIFFField> iter = iterator();
    while (iter.hasNext()) {
        TIFFField f = iter.next();

        TIFFTag tag = f.getTag();

        int type = f.getType();
        int count = f.getCount();

        // Deal with unknown tags
        if (type == 0) {
            type = TIFFTag.TIFF_UNDEFINED;
        }
        int size = count*TIFFTag.getSizeOfType(type);

        if (type == TIFFTag.TIFF_ASCII) {
            int chars = 0;
            for (int i = 0; i < count; i++) {
                chars += f.getAsString(i).length() + 1;
            }
            count = chars;
            size = count;
        }

        int tagNumber = f.getTagNumber();
        stream.writeShort(tagNumber);
        stream.writeShort(type);
        stream.writeInt(count);

        // Write a dummy value to fill space
        stream.writeInt(0);
        stream.mark(); // Mark beginning of next field
        stream.skipBytes(-4);

        long pos;

        if (size > 4 || tag.isIFDPointer()) {
            // Ensure IFD or value is written on a word boundary
            nextSpace = (nextSpace + 3) & ~0x3;

            stream.writeInt((int)nextSpace);
            stream.seek(nextSpace);
            pos = nextSpace;

            if (tag.isIFDPointer() && f.hasDirectory()) {
                TIFFIFD subIFD = getDirectoryAsIFD(f.getDirectory());
                subIFD.writeToStream(stream);
                nextSpace = subIFD.lastPosition;
            } else {
                writeTIFFFieldToStream(f, stream);
                nextSpace = stream.getStreamPosition();
            }
        } else {
            pos = stream.getStreamPosition();
            writeTIFFFieldToStream(f, stream);
        }

        // If we are writing the data for the
        // StripByteCounts, TileByteCounts, StripOffsets,
        // TileOffsets, JPEGInterchangeFormat, or
        // JPEGInterchangeFormatLength fields, record the current stream
        // position for backpatching
        if (tagNumber ==
            BaselineTIFFTagSet.TAG_STRIP_BYTE_COUNTS ||
            tagNumber == BaselineTIFFTagSet.TAG_TILE_BYTE_COUNTS ||
            tagNumber == BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH) {
            this.stripOrTileByteCountsPosition = pos;
        } else if (tagNumber ==
                   BaselineTIFFTagSet.TAG_STRIP_OFFSETS ||
                   tagNumber ==
                   BaselineTIFFTagSet.TAG_TILE_OFFSETS ||
                   tagNumber ==
                   BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT) {
            this.stripOrTileOffsetsPosition = pos;
        }

        stream.reset(); // Go to marked position of next field
    }

    this.lastPosition = nextSpace;
}
Example 4
Source File: TIFFIFD.java    From openjdk-jdk9 with GNU General Public License v2.0 4 votes vote down vote up 
public void writeToStream(ImageOutputStream stream)
    throws IOException {

    int numFields = getNumTIFFFields();
    stream.writeShort(numFields);

    long nextSpace = stream.getStreamPosition() + 12*numFields + 4;

    Iterator<TIFFField> iter = iterator();
    while (iter.hasNext()) {
        TIFFField f = iter.next();

        TIFFTag tag = f.getTag();

        int type = f.getType();
        int count = f.getCount();

        // Deal with unknown tags
        if (type == 0) {
            type = TIFFTag.TIFF_UNDEFINED;
        }
        int size = count*TIFFTag.getSizeOfType(type);

        if (type == TIFFTag.TIFF_ASCII) {
            int chars = 0;
            for (int i = 0; i < count; i++) {
                chars += f.getAsString(i).length() + 1;
            }
            count = chars;
            size = count;
        }

        int tagNumber = f.getTagNumber();
        stream.writeShort(tagNumber);
        stream.writeShort(type);
        stream.writeInt(count);

        // Write a dummy value to fill space
        stream.writeInt(0);
        stream.mark(); // Mark beginning of next field
        stream.skipBytes(-4);

        long pos;

        if (size > 4 || tag.isIFDPointer()) {
            // Ensure IFD or value is written on a word boundary
            nextSpace = (nextSpace + 3) & ~0x3;

            stream.writeInt((int)nextSpace);
            stream.seek(nextSpace);
            pos = nextSpace;

            if (tag.isIFDPointer() && f.hasDirectory()) {
                TIFFIFD subIFD = getDirectoryAsIFD(f.getDirectory());
                subIFD.writeToStream(stream);
                nextSpace = subIFD.lastPosition;
            } else {
                writeTIFFFieldToStream(f, stream);
                nextSpace = stream.getStreamPosition();
            }
        } else {
            pos = stream.getStreamPosition();
            writeTIFFFieldToStream(f, stream);
        }

        // If we are writing the data for the
        // StripByteCounts, TileByteCounts, StripOffsets,
        // TileOffsets, JPEGInterchangeFormat, or
        // JPEGInterchangeFormatLength fields, record the current stream
        // position for backpatching
        if (tagNumber ==
            BaselineTIFFTagSet.TAG_STRIP_BYTE_COUNTS ||
            tagNumber == BaselineTIFFTagSet.TAG_TILE_BYTE_COUNTS ||
            tagNumber == BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT_LENGTH) {
            this.stripOrTileByteCountsPosition = pos;
        } else if (tagNumber ==
                   BaselineTIFFTagSet.TAG_STRIP_OFFSETS ||
                   tagNumber ==
                   BaselineTIFFTagSet.TAG_TILE_OFFSETS ||
                   tagNumber ==
                   BaselineTIFFTagSet.TAG_JPEG_INTERCHANGE_FORMAT) {
            this.stripOrTileOffsetsPosition = pos;
        }

        stream.reset(); // Go to marked position of next field
    }

    this.lastPosition = nextSpace;
}