TiffCompression Enumeration |
Member name | Value | Description | |
---|---|---|---|
None | 0 | Specifies no compression. | |
Rle | 1 | Specifies the RLE compression scheme. | |
Lzw | 2 | Specifies the LZW compression scheme. In Java emulated by Deflate (Zip) compression. | |
Ccitt3 | 3 | Specifies the CCITT3 compression scheme. | |
Ccitt4 | 4 | Specifies the CCITT4 compression scheme. |
Document doc = new Document(); DocumentBuilder builder = new DocumentBuilder(doc); builder.InsertImage(ImageDir + "Logo.jpg"); // Create an "ImageSaveOptions" object which we can pass to the document's "Save" method // to modify the way in which that method renders the document into an image. ImageSaveOptions options = new ImageSaveOptions(SaveFormat.Tiff); // Set the "TiffCompression" property to "TiffCompression.None" to apply no compression while saving, // which may result in a very large output file. // Set the "TiffCompression" property to "TiffCompression.Rle" to apply RLE compression // Set the "TiffCompression" property to "TiffCompression.Lzw" to apply LZW compression. // Set the "TiffCompression" property to "TiffCompression.Ccitt3" to apply CCITT3 compression. // Set the "TiffCompression" property to "TiffCompression.Ccitt4" to apply CCITT4 compression. options.TiffCompression = tiffCompression; doc.Save(ArtifactsDir + "ImageSaveOptions.TiffImageCompression.tiff", options); switch (tiffCompression) { case TiffCompression.None: Assert.That(3000000, Is.LessThan(new FileInfo(ArtifactsDir + "ImageSaveOptions.TiffImageCompression.tiff").Length)); break; case TiffCompression.Rle: #if NET5_0 Assert.That(6000, Is.LessThan(new FileInfo(ArtifactsDir + "ImageSaveOptions.TiffImageCompression.tiff").Length)); #else Assert.That(600000, Is.LessThan(new FileInfo(ArtifactsDir + "ImageSaveOptions.TiffImageCompression.tiff").Length)); #endif break; case TiffCompression.Lzw: Assert.That(200000, Is.LessThan(new FileInfo(ArtifactsDir + "ImageSaveOptions.TiffImageCompression.tiff").Length)); break; case TiffCompression.Ccitt3: Assert.That(90000, Is.AtLeast(new FileInfo(ArtifactsDir + "ImageSaveOptions.TiffImageCompression.tiff").Length)); break; case TiffCompression.Ccitt4: Assert.That(20000, Is.AtLeast(new FileInfo(ArtifactsDir + "ImageSaveOptions.TiffImageCompression.tiff").Length)); break; }