public static TiffBaseCompressor Create(
TiffCompression method,
Stream output,
MemoryAllocator allocator,
int width,
int bitsPerPixel,
DeflateCompressionLevel compressionLevel,
TiffPredictor predictor)
{
switch (method)
{
// The following compression types are not implemented in the encoder and will default to no compression instead.
case TiffCompression.ItuTRecT43:
case TiffCompression.ItuTRecT82:
case TiffCompression.OldJpeg:
case TiffCompression.OldDeflate:
case TiffCompression.None:
DebugGuard.IsTrue(compressionLevel == DeflateCompressionLevel.DefaultCompression, "No deflate compression level is expected to be set");
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new NoCompressor(output, allocator, width, bitsPerPixel));
case TiffCompression.Jpeg:
DebugGuard.IsTrue(compressionLevel == DeflateCompressionLevel.DefaultCompression, "No deflate compression level is expected to be set");
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new TiffJpegCompressor(output, allocator, width, bitsPerPixel));
case TiffCompression.PackBits:
DebugGuard.IsTrue(compressionLevel == DeflateCompressionLevel.DefaultCompression, "No deflate compression level is expected to be set");
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new PackBitsCompressor(output, allocator, width, bitsPerPixel));
case TiffCompression.Deflate:
return(new DeflateCompressor(output, allocator, width, bitsPerPixel, predictor, compressionLevel));
case TiffCompression.Lzw:
DebugGuard.IsTrue(compressionLevel == DeflateCompressionLevel.DefaultCompression, "No deflate compression level is expected to be set");
return(new LzwCompressor(output, allocator, width, bitsPerPixel, predictor));
case TiffCompression.CcittGroup3Fax:
DebugGuard.IsTrue(compressionLevel == DeflateCompressionLevel.DefaultCompression, "No deflate compression level is expected to be set");
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new T4BitCompressor(output, allocator, width, bitsPerPixel, false));
case TiffCompression.CcittGroup4Fax:
DebugGuard.IsTrue(compressionLevel == DeflateCompressionLevel.DefaultCompression, "No deflate compression level is expected to be set");
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new T6BitCompressor(output, allocator, width, bitsPerPixel));
case TiffCompression.Ccitt1D:
DebugGuard.IsTrue(compressionLevel == DeflateCompressionLevel.DefaultCompression, "No deflate compression level is expected to be set");
DebugGuard.IsTrue(predictor == TiffPredictor.None, "Predictor should only be used with lzw or deflate compression");
return(new T4BitCompressor(output, allocator, width, bitsPerPixel, true));
default:
throw TiffThrowHelper.NotSupportedCompressor(method.ToString());
}
}
public DeflateCompressor(Stream output, MemoryAllocator allocator, int width, int bitsPerPixel, TiffPredictor predictor, DeflateCompressionLevel compressionLevel)
: base(output, allocator, width, bitsPerPixel, predictor)
=> this.compressionLevel = compressionLevel;
/// <summary>
/// Initializes a new instance of the <see cref="ZlibDeflateStream"/> class.
/// </summary>
/// <param name="memoryAllocator">The memory allocator to use for buffer allocations.</param>
/// <param name="stream">The stream to compress.</param>
/// <param name="level">The compression level.</param>
public ZlibDeflateStream(MemoryAllocator memoryAllocator, Stream stream, DeflateCompressionLevel level)
: this(memoryAllocator, stream, (PngCompressionLevel)level)
{
}
