public void EncoderOptions_SetPhotometricInterpretationAndCompression_Works(
TiffPhotometricInterpretation?photometricInterpretation,
TiffCompression compression,
TiffBitsPerPixel expectedBitsPerPixel,
TiffCompression expectedCompression)
{
// arrange
var tiffEncoder = new TiffEncoder {
PhotometricInterpretation = photometricInterpretation, Compression = compression
};
using Image input = new Image <Rgb24>(10, 10);
using var memStream = new MemoryStream();
// act
input.Save(memStream, tiffEncoder);
// assert
memStream.Position = 0;
using var output = Image.Load <Rgba32>(memStream);
TiffFrameMetadata rootFrameMetaData = output.Frames.RootFrame.Metadata.GetTiffMetadata();
Assert.Equal(expectedBitsPerPixel, rootFrameMetaData.BitsPerPixel);
Assert.Equal(expectedCompression, rootFrameMetaData.Compression);
}
private static void VerifyExpectedTiffFrameMetaDataIsPresent(TiffFrameMetadata frameMetaData)
{
Assert.NotNull(frameMetaData);
Assert.NotNull(frameMetaData.BitsPerPixel);
Assert.Equal(TiffBitsPerPixel.Bit4, frameMetaData.BitsPerPixel);
Assert.Equal(TiffCompression.Lzw, frameMetaData.Compression);
Assert.Equal(TiffPhotometricInterpretation.PaletteColor, frameMetaData.PhotometricInterpretation);
Assert.Equal(TiffPredictor.None, frameMetaData.Predictor);
}
public void TiffEncoder_PreservesPredictor <TPixel>(TestImageProvider <TPixel> provider, TiffPredictor?expectedPredictor)
where TPixel : unmanaged, IPixel <TPixel>
{
// arrange
var tiffEncoder = new TiffEncoder();
using Image <TPixel> input = provider.GetImage();
using var memStream = new MemoryStream();
// act
input.Save(memStream, tiffEncoder);
// assert
memStream.Position = 0;
using var output = Image.Load <Rgba32>(memStream);
TiffFrameMetadata frameMetadata = output.Frames.RootFrame.Metadata.GetTiffMetadata();
Assert.Equal(expectedPredictor, frameMetadata.Predictor);
}
public void TiffEncoder_PreservesBitsPerPixel_WhenInputIsL8()
{
// arrange
var tiffEncoder = new TiffEncoder();
using Image input = new Image <L8>(10, 10);
using var memStream = new MemoryStream();
TiffBitsPerPixel expectedBitsPerPixel = TiffBitsPerPixel.Bit8;
// act
input.Save(memStream, tiffEncoder);
// assert
memStream.Position = 0;
using var output = Image.Load <Rgba32>(memStream);
TiffFrameMetadata frameMetaData = output.Frames.RootFrame.Metadata.GetTiffMetadata();
Assert.Equal(expectedBitsPerPixel, frameMetaData.BitsPerPixel);
}
public void EncoderOptions_UnsupportedBitPerPixel_DefaultTo24Bits(TiffBitsPerPixel bitsPerPixel)
{
// arrange
var tiffEncoder = new TiffEncoder {
BitsPerPixel = bitsPerPixel
};
using Image input = new Image <Rgb24>(10, 10);
using var memStream = new MemoryStream();
// act
input.Save(memStream, tiffEncoder);
// assert
memStream.Position = 0;
using var output = Image.Load <Rgba32>(memStream);
TiffFrameMetadata frameMetaData = output.Frames.RootFrame.Metadata.GetTiffMetadata();
Assert.Equal(TiffBitsPerPixel.Bit24, frameMetaData.BitsPerPixel);
}
public void EncoderOptions_SetBitPerPixel_Works(TiffBitsPerPixel bitsPerPixel)
{
// arrange
var tiffEncoder = new TiffEncoder {
BitsPerPixel = bitsPerPixel
};
using Image input = new Image <Rgb24>(10, 10);
using var memStream = new MemoryStream();
// act
input.Save(memStream, tiffEncoder);
// assert
memStream.Position = 0;
using var output = Image.Load <Rgba32>(memStream);
TiffFrameMetadata frameMetaData = output.Frames.RootFrame.Metadata.GetTiffMetadata();
Assert.Equal(bitsPerPixel, frameMetaData.BitsPerPixel);
Assert.Equal(TiffCompression.None, frameMetaData.Compression);
}
public void TiffFrameMetadata_CloneIsDeep <TPixel>(TestImageProvider <TPixel> provider)
where TPixel : unmanaged, IPixel <TPixel>
{
using (Image <TPixel> image = provider.GetImage(TiffDecoder))
{
TiffFrameMetadata meta = image.Frames.RootFrame.Metadata.GetTiffMetadata();
var cloneSameAsSampleMetaData = (TiffFrameMetadata)meta.DeepClone();
VerifyExpectedTiffFrameMetaDataIsPresent(cloneSameAsSampleMetaData);
var clone = (TiffFrameMetadata)meta.DeepClone();
clone.BitsPerPixel = TiffBitsPerPixel.Bit8;
clone.Compression = TiffCompression.None;
clone.PhotometricInterpretation = TiffPhotometricInterpretation.CieLab;
clone.Predictor = TiffPredictor.Horizontal;
Assert.False(meta.BitsPerPixel == clone.BitsPerPixel);
Assert.False(meta.Compression == clone.Compression);
Assert.False(meta.PhotometricInterpretation == clone.PhotometricInterpretation);
Assert.False(meta.Predictor == clone.Predictor);
}
}
public void TiffEncoder_EncodesWithCorrectBiColorModeCompression <TPixel>(TestImageProvider <TPixel> provider, TiffCompression compression, TiffCompression expectedCompression)
where TPixel : unmanaged, IPixel <TPixel>
{
// arrange
var encoder = new TiffEncoder()
{
Compression = compression, BitsPerPixel = TiffBitsPerPixel.Bit1
};
using Image <TPixel> input = provider.GetImage();
using var memStream = new MemoryStream();
// act
input.Save(memStream, encoder);
// assert
memStream.Position = 0;
using var output = Image.Load <Rgba32>(memStream);
TiffFrameMetadata frameMetaData = output.Frames.RootFrame.Metadata.GetTiffMetadata();
Assert.Equal(TiffBitsPerPixel.Bit1, frameMetaData.BitsPerPixel);
Assert.Equal(expectedCompression, frameMetaData.Compression);
}
public void Encode_PreservesMetadata <TPixel>(TestImageProvider <TPixel> provider)
where TPixel : unmanaged, IPixel <TPixel>
{
// Load Tiff image
using Image <TPixel> image = provider.GetImage(new TiffDecoder()
{
IgnoreMetadata = false
});
ImageMetadata inputMetaData = image.Metadata;
ImageFrame <TPixel> rootFrameInput = image.Frames.RootFrame;
TiffFrameMetadata frameMetaInput = rootFrameInput.Metadata.GetTiffMetadata();
byte[] xmpProfileInput = rootFrameInput.Metadata.XmpProfile;
ExifProfile exifProfileInput = rootFrameInput.Metadata.ExifProfile;
Assert.Equal(TiffCompression.Lzw, frameMetaInput.Compression);
Assert.Equal(TiffBitsPerPixel.Bit4, frameMetaInput.BitsPerPixel);
// Save to Tiff
var tiffEncoder = new TiffEncoder()
{
PhotometricInterpretation = TiffPhotometricInterpretation.Rgb
};
using var ms = new MemoryStream();
image.Save(ms, tiffEncoder);
// Assert
ms.Position = 0;
using var encodedImage = Image.Load <Rgba32>(ms);
ImageMetadata encodedImageMetaData = encodedImage.Metadata;
ImageFrame <Rgba32> rootFrameEncodedImage = encodedImage.Frames.RootFrame;
TiffFrameMetadata tiffMetaDataEncodedRootFrame = rootFrameEncodedImage.Metadata.GetTiffMetadata();
ExifProfile encodedImageExifProfile = rootFrameEncodedImage.Metadata.ExifProfile;
byte[] encodedImageXmpProfile = rootFrameEncodedImage.Metadata.XmpProfile;
Assert.Equal(TiffBitsPerPixel.Bit4, tiffMetaDataEncodedRootFrame.BitsPerPixel);
Assert.Equal(TiffCompression.Lzw, tiffMetaDataEncodedRootFrame.Compression);
Assert.Equal(inputMetaData.HorizontalResolution, encodedImageMetaData.HorizontalResolution);
Assert.Equal(inputMetaData.VerticalResolution, encodedImageMetaData.VerticalResolution);
Assert.Equal(inputMetaData.ResolutionUnits, encodedImageMetaData.ResolutionUnits);
Assert.Equal(rootFrameInput.Width, rootFrameEncodedImage.Width);
Assert.Equal(rootFrameInput.Height, rootFrameEncodedImage.Height);
PixelResolutionUnit resolutionUnitInput = UnitConverter.ExifProfileToResolutionUnit(exifProfileInput);
PixelResolutionUnit resolutionUnitEncoded = UnitConverter.ExifProfileToResolutionUnit(encodedImageExifProfile);
Assert.Equal(resolutionUnitInput, resolutionUnitEncoded);
Assert.Equal(exifProfileInput.GetValue(ExifTag.XResolution).Value.ToDouble(), encodedImageExifProfile.GetValue(ExifTag.XResolution).Value.ToDouble());
Assert.Equal(exifProfileInput.GetValue(ExifTag.YResolution).Value.ToDouble(), encodedImageExifProfile.GetValue(ExifTag.YResolution).Value.ToDouble());
Assert.Equal(xmpProfileInput, encodedImageXmpProfile);
Assert.Equal("IrfanView", exifProfileInput.GetValue(ExifTag.Software).Value);
Assert.Equal("This is Название", exifProfileInput.GetValue(ExifTag.ImageDescription).Value);
Assert.Equal("This is Изготовитель камеры", exifProfileInput.GetValue(ExifTag.Make).Value);
Assert.Equal("This is Авторские права", exifProfileInput.GetValue(ExifTag.Copyright).Value);
Assert.Equal(exifProfileInput.GetValue(ExifTag.ImageDescription).Value, encodedImageExifProfile.GetValue(ExifTag.ImageDescription).Value);
Assert.Equal(exifProfileInput.GetValue(ExifTag.Make).Value, encodedImageExifProfile.GetValue(ExifTag.Make).Value);
Assert.Equal(exifProfileInput.GetValue(ExifTag.Copyright).Value, encodedImageExifProfile.GetValue(ExifTag.Copyright).Value);
// Note that the encoded profile has PlanarConfiguration explicitly set, which is missing in the original image profile.
Assert.Equal((ushort)TiffPlanarConfiguration.Chunky, encodedImageExifProfile.GetValue(ExifTag.PlanarConfiguration)?.Value);
Assert.Equal(exifProfileInput.Values.Count + 1, encodedImageExifProfile.Values.Count);
}
public void BaselineTags <TPixel>(TestImageProvider <TPixel> provider)
where TPixel : unmanaged, IPixel <TPixel>
{
using (Image <TPixel> image = provider.GetImage(TiffDecoder))
{
ImageFrame <TPixel> rootFrame = image.Frames.RootFrame;
Assert.Equal(32, rootFrame.Width);
Assert.Equal(32, rootFrame.Height);
Assert.NotNull(rootFrame.Metadata.XmpProfile);
Assert.Equal(2599, rootFrame.Metadata.XmpProfile.Length);
ExifProfile exifProfile = rootFrame.Metadata.ExifProfile;
TiffFrameMetadata tiffFrameMetadata = rootFrame.Metadata.GetTiffMetadata();
Assert.NotNull(exifProfile);
// The original exifProfile has 30 values, but 4 of those values will be stored in the TiffFrameMetaData
// and removed from the profile on decode.
Assert.Equal(26, exifProfile.Values.Count);
Assert.Equal(TiffBitsPerPixel.Bit4, tiffFrameMetadata.BitsPerPixel);
Assert.Equal(TiffCompression.Lzw, tiffFrameMetadata.Compression);
Assert.Equal("This is Название", exifProfile.GetValue(ExifTag.ImageDescription).Value);
Assert.Equal("This is Изготовитель камеры", exifProfile.GetValue(ExifTag.Make).Value);
Assert.Equal("This is Модель камеры", exifProfile.GetValue(ExifTag.Model).Value);
Assert.Equal("IrfanView", exifProfile.GetValue(ExifTag.Software).Value);
Assert.Null(exifProfile.GetValue(ExifTag.DateTime)?.Value);
Assert.Equal("This is author1;Author2", exifProfile.GetValue(ExifTag.Artist).Value);
Assert.Null(exifProfile.GetValue(ExifTag.HostComputer)?.Value);
Assert.Equal("This is Авторские права", exifProfile.GetValue(ExifTag.Copyright).Value);
Assert.Equal(4, exifProfile.GetValue(ExifTag.Rating).Value);
Assert.Equal(75, exifProfile.GetValue(ExifTag.RatingPercent).Value);
var expectedResolution = new Rational(10000, 1000, simplify: false);
Assert.Equal(expectedResolution, exifProfile.GetValue(ExifTag.XResolution).Value);
Assert.Equal(expectedResolution, exifProfile.GetValue(ExifTag.YResolution).Value);
Assert.Equal(new Number[] { 8u }, exifProfile.GetValue(ExifTag.StripOffsets)?.Value, new NumberComparer());
Assert.Equal(new Number[] { 297u }, exifProfile.GetValue(ExifTag.StripByteCounts)?.Value, new NumberComparer());
Assert.Null(exifProfile.GetValue(ExifTag.ExtraSamples)?.Value);
Assert.Equal(32u, exifProfile.GetValue(ExifTag.RowsPerStrip).Value);
Assert.Null(exifProfile.GetValue(ExifTag.SampleFormat));
Assert.Equal(TiffPredictor.None, tiffFrameMetadata.Predictor);
Assert.Equal(PixelResolutionUnit.PixelsPerInch, UnitConverter.ExifProfileToResolutionUnit(exifProfile));
ushort[] colorMap = exifProfile.GetValue(ExifTag.ColorMap)?.Value;
Assert.NotNull(colorMap);
Assert.Equal(48, colorMap.Length);
Assert.Equal(10537, colorMap[0]);
Assert.Equal(14392, colorMap[1]);
Assert.Equal(58596, colorMap[46]);
Assert.Equal(3855, colorMap[47]);
Assert.Equal(TiffPhotometricInterpretation.PaletteColor, tiffFrameMetadata.PhotometricInterpretation);
Assert.Equal(1u, exifProfile.GetValue(ExifTag.SamplesPerPixel).Value);
ImageMetadata imageMetaData = image.Metadata;
Assert.NotNull(imageMetaData);
Assert.Equal(PixelResolutionUnit.PixelsPerInch, imageMetaData.ResolutionUnits);
Assert.Equal(10, imageMetaData.HorizontalResolution);
Assert.Equal(10, imageMetaData.VerticalResolution);
TiffMetadata tiffMetaData = image.Metadata.GetTiffMetadata();
Assert.NotNull(tiffMetaData);
Assert.Equal(ByteOrder.LittleEndian, tiffMetaData.ByteOrder);
}
}
protected static void TestStripLength <TPixel>(
TestImageProvider <TPixel> provider,
TiffPhotometricInterpretation photometricInterpretation,
TiffCompression compression,
bool useExactComparer = true,
float compareTolerance = 0.01f)
where TPixel : unmanaged, IPixel <TPixel>
{
// arrange
var tiffEncoder = new TiffEncoder()
{
PhotometricInterpretation = photometricInterpretation, Compression = compression
};
using Image <TPixel> input = provider.GetImage();
using var memStream = new MemoryStream();
TiffFrameMetadata inputMeta = input.Frames.RootFrame.Metadata.GetTiffMetadata();
TiffCompression inputCompression = inputMeta.Compression ?? TiffCompression.None;
// act
input.Save(memStream, tiffEncoder);
// assert
memStream.Position = 0;
using var output = Image.Load <Rgba32>(memStream);
ExifProfile exifProfileOutput = output.Frames.RootFrame.Metadata.ExifProfile;
TiffFrameMetadata outputMeta = output.Frames.RootFrame.Metadata.GetTiffMetadata();
ImageFrame <Rgba32> rootFrame = output.Frames.RootFrame;
Number rowsPerStrip = exifProfileOutput.GetValue(ExifTag.RowsPerStrip) != null?exifProfileOutput.GetValue(ExifTag.RowsPerStrip).Value : TiffConstants.RowsPerStripInfinity;
Assert.True(output.Height > (int)rowsPerStrip);
Assert.True(exifProfileOutput.GetValue(ExifTag.StripOffsets)?.Value.Length > 1);
Number[] stripByteCounts = exifProfileOutput.GetValue(ExifTag.StripByteCounts)?.Value;
Assert.NotNull(stripByteCounts);
Assert.True(stripByteCounts.Length > 1);
Assert.NotNull(outputMeta.BitsPerPixel);
foreach (Number sz in stripByteCounts)
{
Assert.True((uint)sz <= TiffConstants.DefaultStripSize);
}
// For uncompressed more accurate test.
if (compression == TiffCompression.None)
{
for (int i = 0; i < stripByteCounts.Length - 1; i++)
{
// The difference must be less than one row.
int stripBytes = (int)stripByteCounts[i];
int widthBytes = ((int)outputMeta.BitsPerPixel + 7) / 8 * rootFrame.Width;
Assert.True((TiffConstants.DefaultStripSize - stripBytes) < widthBytes);
}
}
// Compare with reference.
TestTiffEncoderCore(
provider,
inputMeta.BitsPerPixel,
photometricInterpretation,
inputCompression,
useExactComparer: useExactComparer,
compareTolerance: compareTolerance);
}
