public int DisplayDepth { get; set; }
@property (nonatomic, assign) NSInteger displayDepth;
public int getDisplayDepth()
public void setDisplayDepth(int value)
DisplayDepth # get and set (CodecsPdfLoadOptions)
Value | Description |
---|---|
0 | Auto-detect (Default value). The resulting image will have the same bits per pixel as the requested page in the source PDF file. Internally, the toolkit will use the bits per pixel value of the first image item found on the page. If the page does not have any image items, the result will be 24 bits per pixel. Use this value only when the source file is a raster PDF. |
1 | 1 bit per pixel in the resulting image. |
4 | 4 bit per pixel in the resulting image. |
8 | 8 bit per pixel in the resulting image. |
24 | 24 bit per pixel in the resulting image. |
Refer to CodecsRasterPdfInfo for information on how to use RasterCodecs.GetRasterPdfInfo to obtain this value from a PDF file saved with RasterCodecs.
This option affects the PDF format when UsePdfEngine is set to true to use Leadtools.Pdf.Utilities.dll, it still affects Postscript format.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;
public void CodecsPdfOptionsExample()
{
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "PDFSegmentation.pdf");
string destFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "PdfOptions.pdf");
string destFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "PdfOptions.bmp");
CodecsImageInfo info = codecs.GetInformation(srcFileName, true);
codecs.Options.Pdf.InitialPath = @"C:\MyApp\Bin";
info = codecs.GetInformation(srcFileName, true);
Debug.WriteLine("Information for: {0}", srcFileName);
Debug.WriteLine(string.Format("Document: {0}", info.Document)); // CodecsDocumentImageInfo reference
Debug.WriteLine(string.Format("Document: {0}", info.Document.IsDocumentFile));
Debug.WriteLine(string.Format("Document: {0}", info.Document.PageHeight));
Debug.WriteLine(string.Format("Document: {0}", info.Document.PageWidth));
Debug.WriteLine(string.Format("Document: {0}", info.Document.Unit));
Debug.WriteLine(string.Format("Document: {0}", info.IsGray8Alpha));
Debug.WriteLine(string.Format("Palette: {0}", info.GetPalette()));
// Check if the PDF engine is installed then get the load and save options of the PDF files.
if (codecs.Options.Pdf.IsEngineInstalled)
{
// Resulting image pixel depth.
// CodecsPdfOptions & CodecsPdfLoadOptions reference
codecs.Options.Pdf.Load.DisplayDepth = 24;
codecs.Options.Pdf.Load.GraphicsAlpha = 4;
codecs.Options.Pdf.Load.DisableCieColors = false;
codecs.Options.Pdf.Load.DisableCropping = false;
codecs.Options.Pdf.Load.EnableInterpolate = false;
codecs.Options.Pdf.Load.Password = "";
// Type of font anti-aliasing to use.
codecs.Options.Pdf.Load.TextAlpha = 1;
codecs.Options.Pdf.Load.UseLibFonts = true;
// Horizontal,vertical display resolution in dots per inch.
codecs.Options.RasterizeDocument.Load.XResolution = 150;
codecs.Options.RasterizeDocument.Load.YResolution = 150;
// CodecsRasterizeDocumentOptions & CodecsRasterizeDocumentLoadOptions reference
codecs.Options.RasterizeDocument.Load.BottomMargin = 0.1;
codecs.Options.RasterizeDocument.Load.LeftMargin = 0.1;
codecs.Options.RasterizeDocument.Load.PageHeight = 11;
codecs.Options.RasterizeDocument.Load.PageWidth = 8.5;
codecs.Options.RasterizeDocument.Load.Resolution = 150;
codecs.Options.RasterizeDocument.Load.RightMargin = 1.25;
codecs.Options.RasterizeDocument.Load.SizeMode = CodecsRasterizeDocumentSizeMode.None; // CodecsRasterizeDocumentSizeMode Enumeration reference
codecs.Options.RasterizeDocument.Load.TopMargin = 1.0;
codecs.Options.RasterizeDocument.Load.Unit = CodecsRasterizeDocumentUnit.Pixel; // CodecsRasterizeDocumentUnit Enumeration reference
using (RasterImage image = codecs.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1))
{
// Set access rights for the user when he\she opens the file we create
// CodecsPdfSaveOptions reference
codecs.Options.Pdf.Save.AssembleDocument = true;
codecs.Options.Pdf.Save.ExtractText = true;
codecs.Options.Pdf.Save.ExtractTextGraphics = true;
codecs.Options.Pdf.Save.PrintDocument = false;
codecs.Options.Pdf.Save.FillForm = true;
codecs.Options.Pdf.Save.ModifyAnnotation = true;
codecs.Options.Pdf.Save.ModifyDocument = true;
codecs.Options.Pdf.Save.OwnerPassword = "LEAD Technologies";
codecs.Options.Pdf.Save.PrintFaithful = false;
codecs.Options.Pdf.Save.TextEncoding = CodecsPdfTextEncoding.Hex;
codecs.Options.Pdf.Save.Use128BitEncryption = true;
codecs.Options.Pdf.Save.UserPassword = "LEAD";
// Set the PDF version to be v1.4
codecs.Options.Pdf.Save.Version = CodecsRasterPdfVersion.V14;
// Save it as linearized (optimized for web view)
codecs.Options.Pdf.Save.Linearized = true;
codecs.Options.Pdf.Save.LowMemoryUsage = false;
codecs.Options.Pdf.Save.SavePdfA = false;
codecs.Options.Pdf.Save.SavePdfv13 = false;
codecs.Options.Pdf.Save.SavePdfv14 = false;
codecs.Options.Pdf.Save.SavePdfv15 = false;
codecs.Options.Pdf.Save.SavePdfv16 = false;
codecs.Options.Pdf.Save.SavePdfv17 = false;
codecs.Options.Pdf.Save.UseImageResolution = true;
// Save the image back as PDF
codecs.Save(image, destFileName1, RasterImageFormat.RasPdf, 24);
}
// And load it back before saving it as BMP
using (RasterImage image = codecs.Load(destFileName1))
{
codecs.Save(image, destFileName2, RasterImageFormat.Bmp, image.BitsPerPixel);
}
}
else
{
Debug.WriteLine("PDF Engine is not found!");
}
// Clean up
codecs.Dispose();
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
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