Render at high DPI with max width

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   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");
    }
}

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Rowan Members Profile Find Members Posts Moderator Group Joined: 10 Jan 09 Status: Offline Points: 398	Post Options Post Reply Quote Rowan Report Post Thanks(0) Quote Reply Topic: Render at high DPI with max width 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"); } }