dpi

I know using images with different DPI is a fairly common practice in Android. But I don't really see the purpose of it, why can't we just use a ultra huge image and then scale it in the program? I know we probably need to do extra calculation if we don't images in different DPI, but besides that, is there's any other reason? Tim and a.d. have the correct reasoning for you. Here's a visual example if you'd like to see a comparison between something rescaled or drawn at the correct size. Effects are always more noticeable if there are very small details. The first is a large 200x200 (we'll call

How can I get the DPI of the PDF that I am reading from my hard drive into iTextSharp? PDF's do not necessarily use DPI in their definitions. PDF's allow the document creator to define their own user coordinate space which may or may not map to anything similar to Dots Per Inch. MK. Check this How to calculate the correct image size in out pdf using itextsharp ? PDF UserUnit shall give the size of default user space units, in multiples of 1 ⁄ 72 inch. ISO-32000-1 (section 8.3.2.3) tells us “the default for the size of the unit in default user space (1/72 inch) is approximately the same as a

Last two questions stayed unanswered, I hope "third one's the charm" works :) I want application that is HDPI use those drawables in folder "drawable-xhdpi" and LDPI devices those in "drawable-mdpi". So I don't have to duplicate same images. Is this possible? Yes, Android scales drawables, selecting the drawable that will produce the best result. But not all scaling combinations work that well. Downscaling to MDPI can produce noticeably poor results. XHDPI to HDPI generally produces pretty good results. But given that the overwhelming majority of devices these days are HDPI, it's probably

I want to get Maximum Dpi of installed or selected printer. I tried PrinterSettings ps = new PrinterSettings(); MessageBox.Show(ps.PrinterResolutions.ToString()); and I get this output: System.Drawing.Printing.PrinterSettings+PreinterResolutionCollection (The desired output is 600x600). Using LINQ: PrinterSettings ps = new PrinterSettings(); var maxResolution = ps.PrinterResolutions.OfType<PrinterResolution>() .OrderByDescending(r => r.X) .ThenByDescending(r => r.Y) .First(); MessageBox.Show(String.Format("{0}x{1}", maxResolution.X, maxResolution.Y)); It looks like PrinterResolutions is a

I'm launching an old win32 app as a child in a wpf app. The problem is that the win32 app ignores the dpi setting when run as a child of the wpf app. The dpi setting has the desired effect on the win32 app when launched in its own window. I've assumed that the wpf app is "dpi aware" and the win32 app becomes so when childed. I would like to get the win32 child app to be sized according to the dpi setting like it is when launched alone. 来源： https://stackoverflow.com/questions/26473511/win32-app-not-affected-by-dpi-setting-when-hosted-by-wpf-app

i've been trying to find a method in C# to measure the size of a string. The standard method to measure a string in Win32 is to use GetTextExtent. The real goal is to find the average width and height of a font character. The standard method to find the average width of a character starts from getting the width of all alphabetic characters and divide by 52: size = dc.GetTextExtent( "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 52); averageWidth = size / 52; Microsoft has a page that lists the average character widths for some font sizes at certain DPI settings, and i've confirmed