Sample Code - Render at high DPI with max width

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Render at high DPI with max width

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: Sample Code
Forum Description: Share Debenu Quick PDF Library sample code with other forum members
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=2204
Printed Date: 27 Apr 24 at 5:36AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Render at high DPI with max width

Posted By: Rowan
Subject: Render at high DPI with max width
Date Posted: 30 Mar 12 at 9:39AM

int outputDPI = 200;

int maxWidth = 1000;

for (int page = 1; page <= totalIMGS; page++)

{

lib.SelectPage(page);

double pageWidth = lib.PageWidth();

double pageHeight = lib.PageHeight();

double scale = 1;

int imgWidth = Convert.ToInt32((pageWidth / 72) * outputDPI);

int imgHeight = Convert.ToInt32((pageHeight / 72) * outputDPI);

if (imgWidth > maxWidth)

{

scale = (double)maxWidth / (double)imgWidth;

imgWidth = maxWidth;

imgHeight = Convert.ToInt32(imgHeight * scale);

}

using (Bitmap dcBmp = new Bitmap(imgWidth, imgHeight))

{

using (Graphics g = Graphics.FromImage(dcBmp))

{

IntPtr hdc = g.GetHdc();

lib.SetRenderScale(scale);

lib.RenderPageToDC(outputDPI, page, hdc);

g.ReleaseHdc(hdc);

}

// dcBmp.Save("page" + page.ToString() + ".bmp");

}