public void Process(TiffEncoderCore encoder)
{
var planarConfig = new ExifShort(ExifTagValue.PlanarConfiguration)
{
Value = (ushort)TiffPlanarConfiguration.Chunky
};
var samplesPerPixel = new ExifLong(ExifTagValue.SamplesPerPixel)
{
Value = GetSamplesPerPixel(encoder)
};
ushort[] bitsPerSampleValue = GetBitsPerSampleValue(encoder);
var bitPerSample = new ExifShortArray(ExifTagValue.BitsPerSample)
{
Value = bitsPerSampleValue
};
ushort compressionType = GetCompressionType(encoder);
var compression = new ExifShort(ExifTagValue.Compression)
{
Value = compressionType
};
var photometricInterpretation = new ExifShort(ExifTagValue.PhotometricInterpretation)
{
Value = (ushort)encoder.PhotometricInterpretation
};
this.Collector.AddOrReplace(planarConfig);
this.Collector.AddOrReplace(samplesPerPixel);
this.Collector.AddOrReplace(bitPerSample);
this.Collector.AddOrReplace(compression);
this.Collector.AddOrReplace(photometricInterpretation);
if (encoder.HorizontalPredictor == TiffPredictor.Horizontal)
{
if (encoder.PhotometricInterpretation == TiffPhotometricInterpretation.Rgb ||
encoder.PhotometricInterpretation == TiffPhotometricInterpretation.PaletteColor ||
encoder.PhotometricInterpretation == TiffPhotometricInterpretation.BlackIsZero)
{
var predictor = new ExifShort(ExifTagValue.Predictor)
{
Value = (ushort)TiffPredictor.Horizontal
};
this.Collector.AddOrReplace(predictor);
}
}
}
private void AddColorMapTag()
{
using IMemoryOwner <byte> colorPaletteBuffer = this.MemoryAllocator.Allocate <byte>(this.colorPaletteBytes);
Span <byte> colorPalette = colorPaletteBuffer.GetSpan();
ReadOnlySpan <TPixel> quantizedColors = this.quantizedImage.Palette.Span;
int quantizedColorBytes = quantizedColors.Length * 3 * 2;
// In the ColorMap, black is represented by 0, 0, 0 and white is represented by 65535, 65535, 65535.
Span <Rgb48> quantizedColorRgb48 = MemoryMarshal.Cast <byte, Rgb48>(colorPalette.Slice(0, quantizedColorBytes));
PixelOperations <TPixel> .Instance.ToRgb48(this.Configuration, quantizedColors, quantizedColorRgb48);
// It can happen that the quantized colors are less than the expected maximum per channel.
int diffToMaxColors = this.maxColors - quantizedColors.Length;
// In a TIFF ColorMap, all the Red values come first, followed by the Green values,
// then the Blue values. Convert the quantized palette to this format.
var palette = new ushort[this.colorPaletteSize];
int paletteIdx = 0;
for (int i = 0; i < quantizedColors.Length; i++)
{
palette[paletteIdx++] = quantizedColorRgb48[i].R;
}
paletteIdx += diffToMaxColors;
for (int i = 0; i < quantizedColors.Length; i++)
{
palette[paletteIdx++] = quantizedColorRgb48[i].G;
}
paletteIdx += diffToMaxColors;
for (int i = 0; i < quantizedColors.Length; i++)
{
palette[paletteIdx++] = quantizedColorRgb48[i].B;
}
var colorMap = new ExifShortArray(ExifTagValue.ColorMap)
{
Value = palette
};
this.EntriesCollector.AddOrReplace(colorMap);
}
/// <summary> /// Gets a new <see cref="ExifShortArray"/> instance for the <see cref="ExifTag.PixelYDimension"/> tag. /// </summary> /// <param name="value">The value.</param> /// <returns>A new <see cref="ExifShortArray"/> instance.</returns> public static ExifShortArray PixelYDimension(ushort[] value) => ExifShortArray.Create(ExifTag.PixelYDimension, value);
/// <summary> /// Gets a new <see cref="ExifShortArray"/> instance for the <see cref="ExifTag.ConsecutiveBadFaxLines"/> tag. /// </summary> /// <param name="value">The value.</param> /// <returns>A new <see cref="ExifShortArray"/> instance.</returns> public static ExifShortArray ConsecutiveBadFaxLines(ushort[] value) => ExifShortArray.Create(ExifTag.ConsecutiveBadFaxLines, value);
/// <summary> /// Gets a new <see cref="ExifShortArray"/> instance for the <see cref="ExifTag.BadFaxLines"/> tag. /// </summary> /// <param name="value">The value.</param> /// <returns>A new <see cref="ExifShortArray"/> instance.</returns> public static ExifShortArray BadFaxLines(ushort[] value) => ExifShortArray.Create(ExifTag.BadFaxLines, value);
/// <summary> /// Gets a new <see cref="ExifShortArray"/> instance for the <see cref="ExifTag.TileLength"/> tag. /// </summary> /// <param name="value">The value.</param> /// <returns>A new <see cref="ExifShortArray"/> instance.</returns> public static ExifShortArray TileLength(ushort[] value) => ExifShortArray.Create(ExifTag.TileLength, value);
/// <summary> /// Gets a new <see cref="ExifShortArray"/> instance for the <see cref="ExifTag.ImageWidth"/> tag. /// </summary> /// <param name="value">The value.</param> /// <returns>A new <see cref="ExifShortArray"/> instance.</returns> public static ExifShortArray ImageWidth(ushort[] value) => ExifShortArray.Create(ExifTag.ImageWidth, value);
