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corrected IFD & strip width calculations for sequence writer

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This commit is contained in:
Oliver Schmidtmer
2016-01-20 00:22:46 +01:00
parent fc80ac2ee9
commit e145de01f3
2 changed files with 43 additions and 26 deletions
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imageio/imageio-tiff/src/main/java/com/twelvemonkeys/imageio/plugins/tiff/TIFFImageWriter.java
+13 -16
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@@ -361,9 +361,11 @@ public final class TIFFImageWriter extends ImageWriterBase {
// TODO: If tiled, write tile indexes etc
// Depending on param.getTilingMode
long nextIFDPointer = -1;
long stripOffset = -1;
long stripByteCount = 0;
if (compression == TIFFBaseline.COMPRESSION_NONE) {
// This implementation, allows semi-streaming-compatible uncompressed TIFFs
long streamOffset = exifWriter.computeIFDSize(entries.values()) + 12; // 12 == 4 byte magic, 4 byte IDD 0 pointer, 4 byte EOF
long streamOffset = imageOutput.getStreamPosition() + exifWriter.computeIFDSize(entries.values()) + 4; // IFD + 4 byte EOF, (header, ifd0 + n images already written)
entries.remove(dummyStripByteCounts);
entries.put(TIFF.TAG_STRIP_BYTE_COUNTS, new TIFFEntry(TIFF.TAG_STRIP_BYTE_COUNTS,
@@ -373,16 +375,15 @@ public final class TIFFImageWriter extends ImageWriterBase {
long idfOffset = exifWriter.writeIFD(entries.values(), imageOutput); // NOTE: Writer takes case of ordering tags
nextIFDPointer = imageOutput.getStreamPosition();
imageOutput.writeInt(0); // Next IFD (none)
long streamPosition = imageOutput.getStreamPosition();
// Update IFD0 pointer
imageOutput.seek(lastIFDPointer);
imageOutput.writeInt((int) idfOffset);
imageOutput.seek(streamPosition);
imageOutput.flushBefore(nextIFDPointer);
imageOutput.seek(nextIFDPointer);
imageOutput.flush();
imageOutput.writeInt(0); // EOF
}
stripOffset = imageOutput.getStreamPosition();
// TODO: Create compressor stream per Tile/Strip
if (compression == TIFFExtension.COMPRESSION_JPEG) {
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("JPEG");
@@ -406,26 +407,23 @@ public final class TIFFImageWriter extends ImageWriterBase {
writeImageData(createCompressorStream(renderedImage, param, entries), renderedImage, numComponents, bandOffsets,
bitOffsets);
}
stripByteCount = imageOutput.getStreamPosition() - stripOffset;
// Update IFD0-pointer, and write IFD
if (compression != TIFFBaseline.COMPRESSION_NONE) {
long thisIFD = imageOutput.getStreamPosition();
entries.remove(dummyStripOffsets);
entries.put(TIFF.TAG_STRIP_OFFSETS, new TIFFEntry(TIFF.TAG_STRIP_OFFSETS, 8));
entries.put(TIFF.TAG_STRIP_OFFSETS, new TIFFEntry(TIFF.TAG_STRIP_OFFSETS, stripOffset));
entries.remove(dummyStripByteCounts);
entries.put(TIFF.TAG_STRIP_BYTE_COUNTS, new TIFFEntry(TIFF.TAG_STRIP_BYTE_COUNTS, thisIFD - 8));
entries.put(TIFF.TAG_STRIP_BYTE_COUNTS, new TIFFEntry(TIFF.TAG_STRIP_BYTE_COUNTS, stripByteCount));
long idfOffset = exifWriter.writeIFD(entries.values(), imageOutput); // NOTE: Writer takes case of ordering tags
nextIFDPointer = imageOutput.getStreamPosition();
imageOutput.writeInt(0); // Next IFD (none)
long streamPosition = imageOutput.getStreamPosition();
// Update IFD0 pointer
imageOutput.seek(lastIFDPointer);
imageOutput.writeInt((int) idfOffset);
imageOutput.seek(streamPosition);
imageOutput.flushBefore(nextIFDPointer);
imageOutput.seek(nextIFDPointer);
imageOutput.flush();
imageOutput.writeInt(0); // EOF
}
return nextIFDPointer;
@@ -892,7 +890,6 @@ public final class TIFFImageWriter extends ImageWriterBase {
if (!isWritingSequence) {
throw new IllegalStateException("prepareWriteSequence() must be called before writeToSequence()!");
}
sequenceLastIFDPos = writePage(image, param, sequenceExifWriter, sequenceLastIFDPos);
}