public async Task TestRoundtrip(bool isTile)
{
TiffGray8[] refImage = new TiffGray8[2048 * 2048];
TiffGray8[] testImage = new TiffGray8[2048 * 2048];
var rand = new Random(42);
rand.NextBytes(MemoryMarshal.AsBytes(refImage.AsSpan()));
var builder = new TiffImageEncoderBuilder();
builder.PhotometricInterpretation = TiffPhotometricInterpretation.BlackIsZero;
builder.Compression = TiffCompression.NoCompression;
builder.IsTiled = isTile;
// Make sure we have at least CacheSize strips or tiles
// Cache size in the current implementation is 256
// Any value greater than 256 should be OK.
builder.RowsPerStrip = 2; // 1024 strips
builder.TileSize = new TiffSize(16, 16); // 16384 tiles
var ms = new MemoryStream();
await GenerateImageAsync(ms, builder, TiffPixelBuffer.WrapReadOnly(refImage, 2048, 2048));
ms.Seek(0, SeekOrigin.Begin);
await using TiffFileReader tiff = await TiffFileReader.OpenAsync(ms, leaveOpen : true);
TiffImageDecoder decoder = await tiff.CreateImageDecoderAsync();
await decoder.DecodeAsync(TiffPixelBuffer.Wrap(testImage, 2048, 2048));
Assert.True(refImage.AsSpan().SequenceEqual(testImage.AsSpan()));
}
public async Task TestAsync(string reference, string test)
{
using var refImage = Image.Load <L8>(reference);
await using TiffFileReader tiff = await TiffFileReader.OpenAsync(test);
TiffStreamOffset ifdOffset = tiff.FirstImageFileDirectoryOffset;
while (!ifdOffset.IsZero)
{
TiffImageFileDirectory ifd = await tiff.ReadImageFileDirectoryAsync(ifdOffset);
TiffImageDecoder decoder = await tiff.CreateImageDecoderAsync(ifd, new TiffImageDecoderOptions { UndoColorPreMultiplying = true });
Assert.Equal(refImage.Width, decoder.Width);
Assert.Equal(refImage.Height, decoder.Height);
TiffGray8[] pixels = new TiffGray8[decoder.Width * decoder.Height];
await decoder.DecodeAsync(TiffPixelBuffer.Wrap(pixels, decoder.Width, decoder.Height));
AssertEqual(refImage, pixels);
using (var image = new Image <L8>(decoder.Width, decoder.Height))
{
decoder.Decode(image);
AssertEqual(refImage, image);
}
ifdOffset = ifd.NextOffset;
}
}
public async Task TestImageDecodeAsync(string refImage, int refIfd, int refBitDepth, string testImage, int testIfd, int testBitDepth)
{
const int BufferBitDepth = 16;
// We do not support decoding into 32 bit buffer yet.
refBitDepth = Math.Min(refBitDepth, BufferBitDepth);
testBitDepth = Math.Min(testBitDepth, BufferBitDepth);
TiffStreamOffset ifdOffset;
TiffImageFileDirectory ifd;
// Load reference image
await using TiffFileReader refTiff = await TiffFileReader.OpenAsync(refImage);
ifdOffset = refTiff.FirstImageFileDirectoryOffset;
Assert.False(ifdOffset.IsZero);
for (int i = 0; i < refIfd; i++)
{
ifd = await refTiff.ReadImageFileDirectoryAsync(ifdOffset);
ifdOffset = ifd.NextOffset;
Assert.False(ifdOffset.IsZero);
}
ifd = await refTiff.ReadImageFileDirectoryAsync(ifdOffset);
TiffImageDecoder refDecoder = await refTiff.CreateImageDecoderAsync(ifd);
// Load test image
await using TiffFileReader testTiff = await TiffFileReader.OpenAsync(testImage);
ifdOffset = testTiff.FirstImageFileDirectoryOffset;
Assert.False(ifdOffset.IsZero);
for (int i = 0; i < testIfd; i++)
{
ifd = await testTiff.ReadImageFileDirectoryAsync(ifdOffset);
ifdOffset = ifd.NextOffset;
Assert.False(ifdOffset.IsZero);
}
ifd = await testTiff.ReadImageFileDirectoryAsync(ifdOffset);
TiffImageDecoder testDecoder = await testTiff.CreateImageDecoderAsync(ifd);
Assert.Equal(refDecoder.Width, testDecoder.Width);
Assert.Equal(refDecoder.Height, testDecoder.Height);
TiffRgba64[] refBuffer = new TiffRgba64[refDecoder.Width * refDecoder.Height];
TiffRgba64[] testBuffer = new TiffRgba64[testDecoder.Width * testDecoder.Height];
await refDecoder.DecodeAsync(TiffPixelBuffer.Wrap(refBuffer, refDecoder.Width, refDecoder.Height));
await testDecoder.DecodeAsync(TiffPixelBuffer.Wrap(testBuffer, testDecoder.Width, testDecoder.Height));
ShiftPixels(MemoryMarshal.Cast <TiffRgba64, ushort>(refBuffer), BufferBitDepth - refBitDepth);
ShiftPixels(MemoryMarshal.Cast <TiffRgba64, ushort>(testBuffer), BufferBitDepth - testBitDepth);
Assert.True(refBuffer.AsSpan().SequenceEqual(testBuffer));
}
private async Task <IImageInfo> IdentifyCoreAsync(TiffFileContentSource contentSource, CancellationToken cancellationToken)
{
using TiffFileReader tiff = await TiffFileReader.OpenAsync(contentSource, cancellationToken : cancellationToken).ConfigureAwait(false);
TiffImageFileDirectory ifd = await tiff.ReadImageFileDirectoryAsync(cancellationToken).ConfigureAwait(false);
TiffImageDecoder decoder = await tiff.CreateImageDecoderAsync(ifd, _options, cancellationToken).ConfigureAwait(false);
return(new ImageInfo()
{
Width = decoder.Width,
Height = decoder.Height
});
}
public async Task TestRoundtrip(bool isTile, int maxDegreeOfParallelism, bool isYCbCr)
{
TiffGray8[] refImage = new TiffGray8[4096 * 4096];
TiffGray8[] testImage = new TiffGray8[4096 * 4096];
var rand = new Random(42);
rand.NextBytes(MemoryMarshal.AsBytes(refImage.AsSpan()));
var builder = new TiffImageEncoderBuilder();
if (isYCbCr)
{
builder.PhotometricInterpretation = TiffPhotometricInterpretation.YCbCr;
builder.HorizontalChromaSubSampling = 2;
builder.VerticalChromaSubSampling = 2;
}
else
{
builder.PhotometricInterpretation = TiffPhotometricInterpretation.BlackIsZero;
builder.Predictor = TiffPredictor.HorizontalDifferencing;
}
builder.Compression = TiffCompression.Lzw;
builder.IsTiled = isTile;
builder.RowsPerStrip = 64;
builder.TileSize = new TiffSize(64, 64);
builder.MaxDegreeOfParallelism = maxDegreeOfParallelism;
var ms = new MemoryStream();
await GenerateImageAsync(ms, builder, TiffPixelBuffer.WrapReadOnly(refImage, 4096, 4096));
ms.Seek(0, SeekOrigin.Begin);
await using TiffFileReader tiff = await TiffFileReader.OpenAsync(ms, leaveOpen : true);
TiffImageDecoder decoder = await tiff.CreateImageDecoderAsync();
await decoder.DecodeAsync(TiffPixelBuffer.Wrap(testImage, 4096, 4096));
Assert.True(refImage.AsSpan().SequenceEqual(testImage.AsSpan()));
}
public async Task Setup()
{
TiffGray8[] image = new TiffGray8[8192 * 8192];
_scratchSpace = TiffPixelBuffer.Wrap(image, 8192, 8192);
var builder = new TiffImageEncoderBuilder();
builder.PhotometricInterpretation = TiffPhotometricInterpretation.WhiteIsZero;
builder.Compression = Compression;
// Generate a image with many strips
var ms = new MemoryStream();
builder.IsTiled = false;
builder.RowsPerStrip = 256;
await GenerateImageAsync(ms, builder, _scratchSpace);
_stripTestTiff = ms.ToArray();
ms.SetLength(0);
// Generate a image with many tiles
builder.IsTiled = true;
builder.TileSize = new TiffSize(512, 512);
await GenerateImageAsync(ms, builder, _scratchSpace);
_tileTestTiff = ms.ToArray();
_stripReader = await TiffFileReader.OpenAsync(_stripTestTiff);
_stripDecoder = await _stripReader.CreateImageDecoderAsync(new TiffImageDecoderOptions { MaxDegreeOfParallelism = DegreeOfParallelism });
await _stripDecoder.DecodeAsync(_scratchSpace);
_tileReader = await TiffFileReader.OpenAsync(_tileTestTiff);
_tileDecoder = await _tileReader.CreateImageDecoderAsync(new TiffImageDecoderOptions { MaxDegreeOfParallelism = DegreeOfParallelism });
await _tileDecoder.DecodeAsync(_scratchSpace);
}
public async Task Setup()
{
TiffGray8[] image = new TiffGray8[8192 * 8192];
_scratchSpace = TiffPixelBuffer.Wrap(image, 8192, 8192);
var builder = new TiffImageEncoderBuilder();
builder.PhotometricInterpretation = TiffPhotometricInterpretation.BlackIsZero;
builder.Compression = TiffCompression.NoCompression;
// Generate a image with many strips
var ms = new MemoryStream();
builder.IsTiled = false;
builder.RowsPerStrip = 1;
await GenerateImageAsync(ms, builder, _scratchSpace);
_stripTestTiff = ms.ToArray();
ms.SetLength(0);
// Generate a image with many tiles
builder.IsTiled = true;
builder.TileSize = new TiffSize(16, 16); // the minimum tile size
await GenerateImageAsync(ms, builder, _scratchSpace);
_tileTestTiff = ms.ToArray();
_stripReader = await TiffFileReader.OpenAsync(_stripTestTiff);
_stripDecoder = await _stripReader.CreateImageDecoderAsync();
await _stripDecoder.DecodeAsync(_scratchSpace);
_tileReader = await TiffFileReader.OpenAsync(_tileTestTiff);
_tileDecoder = await _tileReader.CreateImageDecoderAsync();
await _tileDecoder.DecodeAsync(_scratchSpace);
}
private async Task <Image <TPixel> > DecodeCoreAsync <TPixel>(TiffFileContentSource contentSource, CancellationToken cancellationToken)
where TPixel : unmanaged, IPixel <TPixel>
{
using TiffFileReader tiff = await TiffFileReader.OpenAsync(contentSource, cancellationToken : cancellationToken).ConfigureAwait(false);
TiffImageFileDirectory ifd = await tiff.ReadImageFileDirectoryAsync(cancellationToken).ConfigureAwait(false);
TiffImageDecoder decoder = await tiff.CreateImageDecoderAsync(ifd, _options, cancellationToken).ConfigureAwait(false);
Image <TPixel>?image = new Image <TPixel>(_configuration, decoder.Width, decoder.Height);
try
{
await decoder.DecodeAsync(image, cancellationToken).ConfigureAwait(false);
return(Interlocked.Exchange <Image <TPixel>?>(ref image, null) !);
}
finally
{
image?.Dispose();
}
}
internal async Task <TiffStreamOffset> GenerateReducedResolutionLayerAsync(int layer, TiffStreamOffset ifdOffset, IRipperReducedResolutionGenerationReporter reporter, CancellationToken cancellationToken)
{
int outputTileSize = _options.OutputTileSize;
int outputTileSize2 = 2 * outputTileSize;
TiffImageFileDirectory ifd = await _fileReader.ReadImageFileDirectoryAsync(ifdOffset).ConfigureAwait(false);
TiffImageDecoder image = await _fileReader.CreateImageDecoderAsync(ifd);
int width = image.Width;
int height = image.Height;
int tiffRowCount = (width / 2 + outputTileSize - 1) / outputTileSize;
int tiffColCount = (height / 2 + outputTileSize - 1) / outputTileSize;
int index = 0;
ulong[] offsets = new ulong[tiffRowCount * tiffColCount];
ulong[] byteCounts = new ulong[tiffRowCount * tiffColCount];
ulong totalByteCount = 0;
reporter?.ReportStartReducedResolutionLayerGeneration(layer, offsets.Length, width / 2, height / 2);
using (Image <Rgb24> canvas2 = new Image <Rgb24>(_configuration, outputTileSize2, outputTileSize2))
{
for (int y = 0; y < height; y += outputTileSize2)
{
for (int x = 0; x < width; x += outputTileSize2)
{
cancellationToken.ThrowIfCancellationRequested();
MemoryMarshal.AsBytes(canvas2.GetPixelSpan()).Clear();
await image.DecodeAsync(new TiffPoint(x, y), canvas2).ConfigureAwait(false);
using (Image <Rgb24> tile24 = canvas2.Clone(ctx =>
{
ctx.Resize(outputTileSize, outputTileSize);
}))
{
cancellationToken.ThrowIfCancellationRequested();
TiffStreamRegion region = await _encoder.EncodeAsync(_fileWriter, tile24).ConfigureAwait(false);
offsets[index] = (ulong)region.Offset.Offset;
byteCounts[index] = (uint)region.Length;
totalByteCount += (uint)region.Length;
index++;
reporter?.ReportReducedResolutionLayerGenerationProgress(layer, index, offsets.Length);
}
}
}
}
cancellationToken.ThrowIfCancellationRequested();
using (TiffImageFileDirectoryWriter ifdWriter = _fileWriter.CreateImageFileDirectory())
{
await ifdWriter.WriteTagAsync(TiffTag.NewSubfileType, new TiffValueCollection <ushort>((ushort)TiffNewSubfileType.ReducedResolution)).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.PhotometricInterpretation, new TiffValueCollection <ushort>((ushort)TiffPhotometricInterpretation.YCbCr)).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.Compression, new TiffValueCollection <ushort>((ushort)TiffCompression.Jpeg)).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.SamplesPerPixel, new TiffValueCollection <ushort>((ushort)3)).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.TileWidth, new TiffValueCollection <ushort>((ushort)outputTileSize)).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.TileLength, new TiffValueCollection <ushort>((ushort)outputTileSize)).ConfigureAwait(false);
//ifdWriter.AddTag(TiffTag.ResolutionUnit, (ushort)TiffResolutionUnit.Inch);
//await ifdWriter.WriteTagAsync(TiffTag.XResolution, new TiffValueCollection<TiffRational>(new TiffRational(72, 1)));
//await ifdWriter.WriteTagAsync(TiffTag.YResolution, new TiffValueCollection<TiffRational>(new TiffRational(72, 1)));
await ifdWriter.WriteTagAsync(TiffTag.SampleFormat, new TiffValueCollection <ushort>(new ushort[] { 1, 1, 1 })).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.BitsPerSample, new TiffValueCollection <ushort>(new ushort[] { 8, 8, 8 })).ConfigureAwait(false);
if (UseBigTiff)
{
await ifdWriter.WriteTagAsync(TiffTag.ImageWidth, new TiffValueCollection <ulong>((ulong)(width / 2))).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.ImageLength, new TiffValueCollection <ulong>((ulong)(height / 2))).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.TileOffsets, new TiffValueCollection <ulong>(offsets)).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.TileByteCounts, new TiffValueCollection <ulong>(byteCounts)).ConfigureAwait(false);
}
else
{
await ifdWriter.WriteTagAsync(TiffTag.ImageWidth, new TiffValueCollection <uint>((uint)(width / 2))).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.ImageLength, new TiffValueCollection <uint>((uint)(height / 2))).ConfigureAwait(false);
uint[] tempArr = new uint[offsets.Length];
for (int i = 0; i < tempArr.Length; i++)
{
tempArr[i] = (uint)offsets[i];
}
await ifdWriter.WriteTagAsync(TiffTag.TileOffsets, new TiffValueCollection <uint>(tempArr)).ConfigureAwait(false);
for (int i = 0; i < tempArr.Length; i++)
{
tempArr[i] = (uint)byteCounts[i];
}
await ifdWriter.WriteTagAsync(TiffTag.TileByteCounts, new TiffValueCollection <uint>(tempArr)).ConfigureAwait(false);
}
string software = Software;
if (!string.IsNullOrEmpty(software))
{
await ifdWriter.WriteTagAsync(TiffTag.Software, new TiffValueCollection <string>(software));
}
ifdOffset = await ifdWriter.FlushAsync(ifdOffset).ConfigureAwait(false);
}
reporter?.ReportCompleteReducedResolutionLayerGeneration(layer, offsets.Length, (long)totalByteCount);
return(ifdOffset);
}