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YResolution Property

Summary
Gets or sets the vertical resolution of the PDF page in dots per inch.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public int YResolution { get; set; } 
@property (nonatomic, assign) NSInteger yResolution; 
public int getYResolution() 
public void setYResolution(int value) 
public: 
property int YResolution { 
   int get(); 
   void set (    int ); 
} 
YResolution # get and set (CodecsRasterPdfInfo)

Property Value

The vertical resolution of the PDF page in dots per inch. The default value is 0.

Remarks

This is the same vertical resolution of the RasterImage object to the RasterCodecs.Save method used to create this file if CodecsPdfSaveOptions.UseImageResolution was set to true.

Example
C#
Java
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
private static void CodecsRasterPdfInfoExample() 
{ 
   string multiPageRasterPdfFileName = Path.Combine(LEAD_VARS.ImagesDir, "MultiPageRasterPdf.pdf"); 
   string pagesPdfFileNames = Path.Combine(LEAD_VARS.ImagesDir, "Page{0}.pdf"); 
 
   // Create a 4 pages PDF file 
   CreateMultiPageRasterPdfFile(multiPageRasterPdfFileName); 
 
   // Without prior information, we will split this multi-page PDF file into 
   // multiple single page PDF files with original size, resolution, bit-depth and compression 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      int pagesSaved = 0; 
 
      // Get the file information 
      using (CodecsImageInfo imageInfo = codecs.GetInformation(multiPageRasterPdfFileName, true)) 
      { 
         Debug.WriteLine( 
            "Information: Format:\n Format: {0}\n Pages: {1}\n Bits/Pixel: {2}\n Size: {3} by {4}\n Resolution: {5} by {6}", 
            imageInfo.Format, imageInfo.TotalPages, imageInfo.BitsPerPixel, imageInfo.Width, imageInfo.Height, imageInfo.XResolution, imageInfo.YResolution); 
         Debug.WriteLine("-----------------------"); 
 
         // Now show the PDF specific information 
         // Notice: GetInformation will return RasPdf as the format for all PDF files 
         // regardless of the actual compression 
         if (imageInfo.Format == RasterImageFormat.RasPdf) 
         { 
            Debug.WriteLine("Image is PDF, getting the specific info for each page"); 
 
            for (int i = 0; i < imageInfo.TotalPages; i++) 
            { 
               int pageNumber = i + 1; 
 
               CodecsRasterPdfInfo pdfInfo = codecs.GetRasterPdfInfo(multiPageRasterPdfFileName, i + 1); 
               if (pageNumber == 1) 
               { 
                  Debug.WriteLine(" LEAD PDF?: {0}", pdfInfo.IsLeadPdf); 
                  Debug.WriteLine(" Version: {0}", pdfInfo.Version); 
               } 
 
               if (pdfInfo.IsLeadPdf) 
               { 
                  Debug.WriteLine( 
                     "Page {0} of {1} info:\n Bits/Pixel: {2}\n Size: {3} by {4}\n Resolution: {5} by {6}\n Format: {7}", 
                     pageNumber, imageInfo.TotalPages, pdfInfo.BitsPerPixel, pdfInfo.Width, pdfInfo.Height, pdfInfo.XResolution, pdfInfo.YResolution, pdfInfo.Format); 
                  Debug.WriteLine("-----------------------"); 
 
                  // Load this page with its original parameters 
                  codecs.Options.RasterizeDocument.Load.XResolution = pdfInfo.XResolution; 
                  codecs.Options.RasterizeDocument.Load.YResolution = pdfInfo.YResolution; 
                  codecs.Options.Pdf.Load.DisplayDepth = pdfInfo.BitsPerPixel; 
 
                  using (RasterImage pageImage = codecs.Load(multiPageRasterPdfFileName, 0, CodecsLoadByteOrder.BgrOrGray, pageNumber, pageNumber)) 
                  { 
                     Debug.WriteLine( 
                        "Page {0} of {1} loaded:\n Bits/Pixel: {2}\n Size: {3} by {4}\n Resolution: {5} by {6}", 
                        pageNumber, imageInfo.TotalPages, pageImage.BitsPerPixel, pageImage.Width, pageImage.Height, pageImage.XResolution, pageImage.YResolution); 
                     Debug.WriteLine("-----------------------"); 
 
                     // Setup the PDF save options 
                     codecs.Options.Pdf.Save.UseImageResolution = true; 
                     codecs.Options.Pdf.Save.Version = pdfInfo.Version; 
 
                     // Save this page to a separate file 
                     string pagePdfFileName = string.Format(pagesPdfFileNames, pageNumber); 
                     codecs.Save(pageImage, pagePdfFileName, pdfInfo.Format, pdfInfo.BitsPerPixel); 
                     pagesSaved++; 
                  } 
               } 
            } 
         } 
      } 
 
      // We are done, now show the info of the generated files 
      for (int i = 0; i < pagesSaved; i++) 
      { 
         int pageNumber = i + 1; 
         string pagePdfFileName = string.Format(pagesPdfFileNames, pageNumber); 
 
         CodecsRasterPdfInfo pdfInfo = codecs.GetRasterPdfInfo(pagePdfFileName, 1); 
         Debug.WriteLine( 
            "Page {0} of {1} info:\n Bits/Pixel: {2}\n Size: {3} by {4}\n Resolution: {5} by {6}\n Format: {7}", 
            pageNumber, pagesSaved, pdfInfo.BitsPerPixel, pdfInfo.Width, pdfInfo.Height, pdfInfo.XResolution, pdfInfo.YResolution, pdfInfo.Format); 
         Debug.WriteLine("-----------------------"); 
      } 
   } 
} 
 
private static void CreateMultiPageRasterPdfFile(string pdfFileName) 
{ 
   string sourceFile = Path.Combine(LEAD_VARS.ImagesDir, "Sample1.cmp"); 
 
   // Delete the destination PDF file if exists 
   if (System.IO.File.Exists(pdfFileName)) 
   { 
      System.IO.File.Delete(pdfFileName); 
   } 
 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      // Save to PDF v1.4 
      codecs.Options.Pdf.Save.Version = CodecsRasterPdfVersion.V14; 
      // Save using image resolution 
      codecs.Options.Pdf.Save.UseImageResolution = true; 
 
      // Load the source file to use for each page 
      using (RasterImage pageImage = codecs.Load(sourceFile, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1)) 
      { 
         Debug.WriteLine( 
            "Original image dimension:\n Size: {0} by {1}\n Resolution: {2} by {3}", 
            pageImage.Width, pageImage.Height, pageImage.XResolution, pageImage.YResolution); 
 
         // Array of bits/pixel and compression to use when saving the pages 
         int[] bitsPerPixel = 
         { 
        1, 
        8, 
        24 
      }; 
         RasterImageFormat[] formats = 
         { 
        RasterImageFormat.RasPdfG4, 
        RasterImageFormat.RasPdfLzw, 
        RasterImageFormat.RasPdfJpeg422 
      }; 
 
         int pageCount = bitsPerPixel.Length; 
         for (int i = 0; i < pageCount; i++) 
         { 
            // Append this page with given format 
            Debug.WriteLine("Saving page {0} of {1} using {2} at {3}", i + 1, pageCount, bitsPerPixel[i], formats[i]); 
            codecs.Save(pageImage, pdfFileName, formats[i], bitsPerPixel[i], 1, 1, -1, CodecsSavePageMode.Append); 
         } 
      } 
 
      Debug.WriteLine("-----------------------"); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
} 
 
import java.io.*; 
import java.net.*; 
import java.nio.file.Paths; 
import java.util.*; 
import java.time.Instant; 
import java.time.Duration; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.codecs.RasterCodecs.FeedCallbackThunk; 
import leadtools.drawing.internal.*; 
import leadtools.imageprocessing.*; 
import leadtools.imageprocessing.color.ChangeIntensityCommand; 
import leadtools.svg.*; 
 
 
public void codecsRasterPdfInfoExample() throws IOException { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String multiPageRasterPdfFileName = combine(LEAD_VARS_IMAGES_DIR, "MultiPageRasterPdf.pdf"); 
   String pagesPdfFileNames = combine(LEAD_VARS_IMAGES_DIR, "Page%s.pdf"); 
 
   // Create a 4 pages PDF file 
   createMultiPageRasterPdfFile(multiPageRasterPdfFileName); 
 
   // Without prior information, we will split this multi-page PDF file into 
   // multiple single page PDF files with original size, resolution, bit-depth and 
   // compression 
   RasterCodecs codecs = new RasterCodecs(); 
   int pagesSaved = 0; 
 
   // Get the file information 
   CodecsImageInfo imageInfo = codecs.getInformation(multiPageRasterPdfFileName, true); 
   System.out.printf( 
         "Information: Format:%n Format: %s%n Pages: %s%n Bits/Pixel: %s%n Size: %S%n by %s%n Resolution: %s by %s%n", 
         imageInfo.getFormat(), imageInfo.getTotalPages(), imageInfo.getBitsPerPixel(), imageInfo.getWidth(), 
         imageInfo.getHeight(), imageInfo.getXResolution(), imageInfo.getYResolution()); 
   System.out.println("-----------------------"); 
 
   // Now show the PDF specific information 
   // Notice: GetInformation will return RasPdf as the format for all PDF files 
   // regardless of the actual compression 
   if (imageInfo.getFormat() == RasterImageFormat.RAS_PDF) { 
      System.out.println("Image is PDF, getting the specific info for each page"); 
 
      ILeadStream multiPageRasterStream = LeadStreamFactory.create(multiPageRasterPdfFileName); 
      for (int i = 0; i < imageInfo.getTotalPages(); i++) { 
         int pageNumber = i + 1; 
         CodecsRasterPdfInfo pdfInfo = codecs.getRasterPdfInfo(multiPageRasterStream, i + 1); 
         if (pageNumber == 1) { 
            System.out.println(" LEAD PDF?: " + pdfInfo.isLeadPdf()); 
            System.out.println(" Version: " + pdfInfo.getVersion()); 
         } 
 
         if (pdfInfo.isLeadPdf()) { 
            System.out.printf( 
                  "Page %s of %s info:%n Bits/Pixel: %s%n Size: %s by %s%n Resolution: %s by %s%n Format: %s%n", 
                  pageNumber, imageInfo.getTotalPages(), pdfInfo.getBitsPerPixel(), pdfInfo.getWidth(), 
                  pdfInfo.getHeight(), pdfInfo.getXResolution(), pdfInfo.getYResolution(), pdfInfo.getFormat()); 
            System.out.println("-----------------------"); 
 
            // Load this page with its original parameters 
            codecs.getOptions().getRasterizeDocument().getLoad().setXResolution(pdfInfo.getXResolution()); 
            codecs.getOptions().getRasterizeDocument().getLoad().setYResolution(pdfInfo.getYResolution()); 
            codecs.getOptions().getPdf().getLoad().setDisplayDepth(pdfInfo.getBitsPerPixel()); 
 
            RasterImage pageImage = codecs.load(multiPageRasterPdfFileName, 0, CodecsLoadByteOrder.BGR_OR_GRAY, 
                  pageNumber, pageNumber); 
            System.out.printf( 
                  "Page %s of %s loaded:%n Bits/Pixel: %s%n Size: %s by %s%n Resolution: %s by %s%n", 
                  pageNumber, imageInfo.getTotalPages(), pageImage.getBitsPerPixel(), pageImage.getWidth(), 
                  pageImage.getHeight(), pageImage.getXResolution(), pageImage.getYResolution()); 
            System.out.println("-----------------------"); 
 
            // Setup the PDF save options 
            codecs.getOptions().getPdf().getSave().setUseImageResolution(true); 
            codecs.getOptions().getPdf().getSave().setVersion(pdfInfo.getVersion()); 
 
            // Save this page to a separate file 
            String pagePdfFileName = String.format(pagesPdfFileNames, pageNumber); 
            codecs.save(pageImage, pagePdfFileName, pdfInfo.getFormat(), pdfInfo.getBitsPerPixel()); 
            pagesSaved++; 
         } 
      } 
      multiPageRasterStream.close(); 
   } 
   // We are done, now show the info of the generated files 
   for (int i = 0; i < pagesSaved; i++) { 
      int pageNumber = i + 1; 
      String pagePdfFileName = String.format(pagesPdfFileNames, pageNumber); 
      ILeadStream pagePdfFileStream = LeadStreamFactory.create(pagePdfFileName); 
      CodecsRasterPdfInfo pdfInfo = codecs.getRasterPdfInfo(pagePdfFileStream, 1); 
      System.out.printf( 
            "Page %s of %s info:%n Bits/Pixel: %s%n Size: %s by %s%n Resolution: %s by %s%n Format: %s%n", 
            pageNumber, pagesSaved, pdfInfo.getBitsPerPixel(), pdfInfo.getWidth(), pdfInfo.getHeight(), 
            pdfInfo.getXResolution(), pdfInfo.getYResolution(), pdfInfo.getFormat()); 
      System.out.println("-----------------------"); 
      pagePdfFileStream.close(); 
   } 
} 
 
private static void createMultiPageRasterPdfFile(String pdfFileName) { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String sourceFile = combine(LEAD_VARS_IMAGES_DIR, "Sample1.cmp"); 
 
   // Delete the destination PDF file if exists 
   File pdfFile = new File(pdfFileName); 
   if (pdfFile.exists()) { 
      pdfFile.delete(); 
   } 
 
   RasterCodecs codecs = new RasterCodecs(); 
   // Save to PDF v1.4 
   codecs.getOptions().getPdf().getSave().setVersion(CodecsRasterPdfVersion.V14); 
   // Save using image resolution 
   codecs.getOptions().getPdf().getSave().setUseImageResolution(true); 
 
   // Load the source file to use for each page 
   RasterImage pageImage = codecs.load(sourceFile, 0, CodecsLoadByteOrder.BGR_OR_GRAY, 1, 1); 
 
   System.out.printf("Original image dimension:%n Size: %s by %s%n Resolution: %s by %s%n", 
         pageImage.getWidth(), pageImage.getHeight(), pageImage.getXResolution(), pageImage.getYResolution()); 
 
   // Array of bits/pixel and compression to use when saving the pages 
   int[] bitsPerPixel = { 1, 8, 24 }; 
   RasterImageFormat[] formats = { RasterImageFormat.RAS_PDF_G4, RasterImageFormat.RAS_PDF_LZW, 
         RasterImageFormat.RAS_PDF_JPEG }; 
 
   int pageCount = bitsPerPixel.length; 
   for (int i = 0; i < pageCount; i++) { 
      // Append this page with given format 
      System.out.printf("Saving page %s of %s using %s at %s", i + 1, pageCount, bitsPerPixel[i], formats[i]); 
      codecs.save(pageImage, pdfFileName, formats[i], bitsPerPixel[i], 1, 1, -1, CodecsSavePageMode.APPEND); 
   } 
   System.out.println("-----------------------"); 
 
}
Requirements

Target Platforms

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