Add 300dpi image to PDF

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   Hello.I want to add a jpg image to a PDF with AddImageFromFile. This image is about 1400x1200 px but with 300dpi. When I print this image is about 10x10 cm long, but If I add this image to pdf it takes all the page. 
The problem is how I say the resolution of image when adding it to pdf.
I try with FitImage and SetImageResolution, but I cann't do it.
Some help?
thanks.

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byron Members Profile Find Members Posts Beginner Joined: 15 Jun 12 Status: Offline Points: 4	Post Options Post Reply Quote byron Report Post Thanks(0) Quote Reply Topic: Add 300dpi image to PDF Posted: 13 Mar 13 at 1:04PM
	Hello. I want to add a jpg image to a PDF with AddImageFromFile. This image is about 1400x1200 px but with 300dpi. When I print this image is about 10x10 cm long, but If I add this image to pdf it takes all the page. The problem is how I say the resolution of image when adding it to pdf. I try with FitImage and SetImageResolution, but I cann't do it. Some help? thanks.

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 13 Mar 13 at 11:01PM
	Some sample code would be helpful. Here is a link that shows the correct way to add an image to a PDF and size it correctly based on the imageWidth/Height and DPI. http://www.quickpdf.org/forum/creating-a-multi-page-pdf-from-a-multipage-tiff_topic2125.html The trick is to call int dpix = QP.ImageHorizontalResolution(); and int dpiy = QP.ImageVerticalResolution(); as QP.ImageWidth and QP.ImageHeight return values in pixels whereas QP.DrawImage requires values in points by default (72 points = 1 inch) Andrew.

byron Members Profile Find Members Posts Beginner Joined: 15 Jun 12 Status: Offline Points: 4	Post Options Post Reply Quote byron Report Post Thanks(0) Quote Reply Posted: 14 Mar 13 at 7:37AM
	Thanks for your answer. Here is the procedure I use: - An example of image is a jpg: 1013x1500 px with 300 dpi and 24 bits color. - If I print this image directly from windows, it's about 85mm x 125mm. - I have a PDF with only one A4 page. - I want to add this image to the page, but I must fit the real dimension when printed, that is, 85x123mm. I use the next Delphi code: PDFLibrary.LoadFromFile('c:\tmp\mypdf.pdf',''); idx:=PDFLibrary.AddImageFromFile('c:\tmp\myimage.jpg',0); PDFLibrary.SelectImage(idx); PDFLibrary.SetImageResolution(300,300,2); hr:=((jpg.width2.54)/10); vr:=((jpg.Height2.54)/10); PDFLibrary.FitImage(0, PDFLibrary.PageHeight, hr, vr, 1, 1, 0); PDFLibrary.SaveToFile(filename); I'll try with PDFLibrary.DrawImage(0, PDFLibrary.PageHeight, hr, vr); too. The image is added and render good and I open pdf and see its size is correctly on A4 page. But the problem is If I print the image with full quality and see difference from printing the jpg image directly to printer. I think the problem is FitImage or Draw image reduce dpi resolution when draw. Or pheraps I have a mistake. Any help?