Debenu Quick PDF Library - PDF SDK Community Forum : DrawImage function problem http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 30 May 2026 05:27:27 +0000 Mon, 11 Jun 2012 22:22:05 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=2296 <![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[DrawImage function problem : How about using vector-logos?...]]> http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9756.html#9756 Author: Autodidact
Subject: 2296
Posted: 11 Jun 12 at 10:22PM

How about using vector-logos? If the logo don't have to be in bitmap, which it rarely should/do, you could have a crisp logo scaled to any size — with a very low disk footprint.]]> Mon, 11 Jun 2012 22:22:05 +0000 http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9756.html#9756 <![CDATA[DrawImage function problem : Mea culpa.Thank you Andrew for...]]> http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9755.html#9755 Author: alinux
Subject: 2296
Posted: 11 Jun 12 at 7:50PM

Mea culpa.

Thank you Andrew for your explanation and your time.

alinux

]]> Mon, 11 Jun 2012 19:50:06 +0000 http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9755.html#9755 <![CDATA[DrawImage function problem : ImageWidth and ImageHeight return...]]> http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9749.html#9749 Author: AndrewC
Subject: 2296
Posted: 08 Jun 12 at 11:53AM

ImageWidth and ImageHeight return a value in pixels so you cannot use this pixel value directly in DrawImage as it require a location in points (72 points = 1 inch)

Here is some code that will do what you need.

    QP.SetMeasurementUnits(0);

    int dpix = QP.ImageHorizontalResolution();
    int dpiy = QP.ImageVerticalResolution();

    if (dpix == 0) dpix = 72;
    if (dpiy == 0) dpiy = 72;

    int xx = QP.ImageWidth();
    int yy = QP.ImageHeight();

    double ImageWidthInPoints = (double)QP.ImageWidth() / dpix * 72.0; // assumming dpi units
    double ImageHeightInPoints = (double)QP.ImageHeight() / dpiy * 72.0;

    QP.DrawImage(0, 0, ImageWidthInPoints, ImageHeightInPoints);

Andrew.]]> Fri, 08 Jun 2012 11:53:12 +0000 http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9749.html#9749 <![CDATA[DrawImage function problem : Hi Andrew,I&#039;d like only to...]]> http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9744.html#9744 Author: alinux
Subject: 2296
Posted: 07 Jun 12 at 5:17PM

Hi Andrew,

I'd like only to draw an image (a logo for example) into a PDF. As result I have a "pixelated" image  into the pdf.

I only load image from resources file (c# .Net) and use drawimage function. Same result with drawscaledimage function (scale level = 1):

MemoryStream ms = new MemoryStream();
Image img = ProjectName.ResourceFile.bpo_logo;
img.Save(ms, ImageFormat.Jpeg);
qp.AddImageFromVariant(ms.ToArray(), 0);
qp.SelectImage(qp.GetImageID(1));
qp.DrawImage(30, 30, qp.ImageWidth(), qp.ImageHeight());

I have the same result with all image formats (BMP, TIF, GIF, JPG, PNG).

alinux

]]> Thu, 07 Jun 2012 17:17:39 +0000 http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9744.html#9744 <![CDATA[DrawImage function problem : Can you post a code sample.PostScript...]]> http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9737.html#9737 Author: AndrewC
Subject: 2296
Posted: 07 Jun 12 at 2:00PM

Can you post a code sample.

PostScript and PDF scale the image to the required size so the resolution will change.  This is how it is designed to work.

What exactly are you trying to acheive ?  smaller filesize ?

Andrew.
]]> Thu, 07 Jun 2012 14:00:03 +0000 http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9737.html#9737 <![CDATA[DrawImage function problem : Hello,Using DrawImage/DrawScaledImage...]]> http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9734.html#9734 Author: alinux
Subject: 2296
Posted: 07 Jun 12 at 9:08AM

Hello,

Using DrawImage/DrawScaledImage alter image resolution (any image format) in PDF (even using ImageHorizontalResolution & ImageVerticalResolution).

Do anyone have an idea to how avoid this?

Thanks,
alinux
]]> Thu, 07 Jun 2012 09:08:35 +0000 http://www.quickpdf.org/forum/drawimage-function-problem_topic2296_post9734.html#9734