I need help - I can help - PNG Files to TIFF getting converted to Blank

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PNG Files to TIFF getting converted to Blank

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=3775
Printed Date: 01 May 24 at 5:02PM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: PNG Files to TIFF getting converted to Blank

Posted By: rocky1
Subject: PNG Files to TIFF getting converted to Blank
Date Posted: 22 Jan 20 at 8:29AM

Hi ,

I am currently using the DebenuPDFLibraryDLL1011 in my C# application using VS 2017 with .net framework - 4.6.1

I am trying to convert the .png files to tiff using the Method = "RenderDocumentToFile"

and "

byte[] bytesPageBitmap = PL.RenderPageToString(renderDPI, intPageIndex, 0);"

but desired output file results into the blank image when I try to saveas a ".tif image format"

Code -

PDFLibrary PL = new PDFLibrary(strDLLPath);

if (PL.LibraryLoaded())

{

PL.UnlockKey(PdfTask.DebenuPDFLibraryUnlockKey);

var strFileName = @"D:\png files\1.png";

PL.LoadFromFile(strFileName, string.Empty);

const float renderDPI = 180;

int intPageCount = PL.PageCount();

for (int intPageIndex = 1; intPageIndex <= intPageCount; intPageIndex++)

{

// PDF to bitmap

int i = PL.RenderDocumentToFile(renderDPI, intPageIndex, 0, 7, @"D:\my.tiff");

}

Replies:

Posted By: Ingo
Date Posted: 22 Jan 20 at 11:11AM

Hi Rocky,

please keep in mind that it's a pdf-library you're working with ;-)

You can render a pdf-page to an image format or you can render an image to a pdf-page...

But you can't render one image type to another image type with this library.

If you want this with QuickPDF you have to make two steps:

png to pdf ... and then pdf to tiff.

Cheers and welcome here,

Ingo

-------------
Cheers,
Ingo

Posted By: rocky1
Date Posted: 22 Jan 20 at 2:33PM

Oh Thank you Ingo for the update on this