Debenu Quick PDF Library - PDF SDK Community Forum : Text too Faint on Render http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sun, 05 Apr 2026 20:41:25 +0000 Sun, 09 Mar 2014 13:56:56 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=2828 <![CDATA[Debenu Quick PDF Library - PDF SDK Community Forum]]> http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ <![CDATA[Text too Faint on Render : Oberon,There is a 2nd conversion...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11547.html#11547 Author: AndrewC
Subject: 2828
Posted: 09 Mar 14 at 1:56PM

Oberon,

There is a 2nd conversion going on when you scale the image inside the PictureBox which would not be helping things.  

You would get better results using RenderPageToDC as there would be less scaling operations involved or to use the new Debenu ActiveX renderer released alongside version 10.13 of Debenu PDF Library.  

http://www.debenu.com/products/development/debenu-pdf-viewer-sdk/

The other issues are the fact that Acrobat has a special function to enhance thin lines which is not easy to replicate when using GDI+ or our new rendering engine.  Acrobat has spent millions of dollars developing, fine tuning and optimising their rendering engine.  

Andrew.
]]> Sun, 09 Mar 2014 13:56:56 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11547.html#11547 <![CDATA[Text too Faint on Render : Hi Andy,he wants to build his...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11514.html#11514 Author: Ingo
Subject: 2828
Posted: 25 Feb 14 at 7:49AM

Hi Andy,
 
he wants to build his own simple pdf-reader ;-)
 
Cheers, Ingo
]]> Tue, 25 Feb 2014 07:49:31 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11514.html#11514 <![CDATA[Text too Faint on Render : Oberon, a quick question out...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11511.html#11511 Author: AndyD
Subject: 2828
Posted: 24 Feb 14 at 6:08PM

Oberon, a quick question out of curiosity really, why are you rendering this anyway and not leaving it as a pdf?
 
 
]]> Mon, 24 Feb 2014 18:08:58 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11511.html#11511 <![CDATA[Text too Faint on Render : Here&#039;s the code I use Private...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11510.html#11510 Author: oberon232
Subject: 2828
Posted: 24 Feb 14 at 3:38PM

Here's the code I use

    Private Sub ShowPageInControl(ByRef ctrl As Control)
        Dim bmpData() As Byte
        Dim ms As IO.MemoryStream
        Dim bmp As Bitmap


        QP.SetGDIPlusOptions(3, 1)

        bmpData = DirectCast(QP.RenderPageToVariant(200, CurrentPage, 0), Byte())
        ms = New IO.MemoryStream(bmpData)
        bmp = New Bitmap(ms)
        bmp.Save(ms, ImageFormat.Png)

        PictureBox1.Image = bmp
        ms.Dispose()
    End Sub

And here is the screen capture http://dblinc.no-ip.com/andrew/screenCap.jpg
]]> Mon, 24 Feb 2014 15:38:46 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11510.html#11510 <![CDATA[Text too Faint on Render : Oberon,What DPI are you using...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11507.html#11507 Author: AndrewC
Subject: 2828
Posted: 22 Feb 14 at 4:52AM

Oberon,

What DPI are you using to render to the Bitmap ?  Can you post a sample screen shot of what is currently being output ?

I use RenderPageToFile and 100, 200 and 300 dpi with  QP.SetGDIPlusOptions(3, 1); and do not see any real quality issues with your PDF file.

RenderPageToDC will produce better results as is use the native DPI and pixels available.  Converting it to a bitmap will lose some definition as the image then needs to be rescaled to fit in the picturebox.  So it is not a fair comparison to compare Acrobat to a scaled PictureBox image especially if the PictureBox is doing anything but 1:1 scaling.

Andrew.
]]> Sat, 22 Feb 2014 04:52:23 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11507.html#11507 <![CDATA[Text too Faint on Render : I am rendering to a bitmap in...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11504.html#11504 Author: oberon232
Subject: 2828
Posted: 21 Feb 14 at 3:56PM

I am rendering to a bitmap in a memory stream, and then sending that as the source of a picture box. I originally did the methodology of rending to DC, but the picture box allows me to scroll and zoom simply by changing the dimension of the picture box in the form.

I have tried QP.SetGDIPlusOptions(3, 1);  
]]> Fri, 21 Feb 2014 15:56:36 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11504.html#11504 <![CDATA[Text too Faint on Render : Oberon,Have you tried using...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11490.html#11490 Author: AndrewC
Subject: 2828
Posted: 18 Feb 14 at 12:26PM


Oberon,

Have you tried using 

            QP.SetGDIPlusOptions(3, 1);     // Turn on image smoothing

Do we assume you are using the RenderPageToDC function ?  Are you rendering to a local DC or to a Remote Desktop or terminal server DC ?

Andrew.



Edited by AndrewC - 18 Feb 14 at 12:29PM]]> Tue, 18 Feb 2014 12:26:31 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11490.html#11490 <![CDATA[Text too Faint on Render : One of the files I have posted...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11486.html#11486 Author: oberon232
Subject: 2828
Posted: 17 Feb 14 at 2:24PM

One of the files I have posted for review.

http://96.237.50.19/Andrew/1128618277.pdf]]> Mon, 17 Feb 2014 14:24:33 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11486.html#11486 <![CDATA[Text too Faint on Render : Oberon,This is most likely related...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11481.html#11481 Author: AndrewC
Subject: 2828
Posted: 14 Feb 14 at 11:45PM

Oberon,

This is most likely related to the PDF file itself. We would need to see the PDF file in order to make further comments.  You can either post a download link here or can create a support case by emailing support@debenu.com

The upcoming Debenu Quick PDF Library 10.13 version will include an improved rendering engine and may improve the rendering results.

Andrew.
]]> Fri, 14 Feb 2014 23:45:01 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11481.html#11481 <![CDATA[Text too Faint on Render : When I open a file in Acrobat...]]> http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11477.html#11477 Author: oberon232
Subject: 2828
Posted: 13 Feb 14 at 11:07PM

When I open a file in Acrobat Viewer full screen, the text is bold and legible, but when I render the image onto a full screen (same size) DC, the text is very light and faint. 
I have tried adjusting the SetGDIPlusOptions, but have not found any that make the page look any closer to the Adobe view.
Does anyone have experience with this problem? 
]]> Thu, 13 Feb 2014 23:07:24 +0000 http://www.quickpdf.org/forum/text-too-faint-on-render_topic2828_post11477.html#11477