Need to know current printer PPI
Posted: July 1st, 2011, 12:44 pmHow to get printer PPI? I'm using TPrintPreview. I know how to get vert/hor DPI, but don't know how to PPI?
DELPHI AREA Forum
The place to exchange ideas and experiences on Delphi programming
http://forum.delphiarea.com/
Need to know current printer PPI
Page 1 of 1
Posted: July 1st, 2011, 12:44 pmRe: Need to know current printer PPI
Posted: July 1st, 2011, 11:53 pmDoes PPI stand for pixels per inch?
Re: Need to know current printer PPI
Posted: July 2nd, 2011, 7:32 amYes, pixels per inch or pixel density. I checked formula here:
http://en.wikipedia.org/wiki/Pixel_density
and wrote this:
but looks to be wrong
http://en.wikipedia.org/wiki/Pixel_density
and wrote this:
- Code: Select all
dp := Round(Sqrt(Sqr(PrintPreview1.PageDevicePixels.X) + Sqr(PrintPreview1.PageDevicePixels.Y)));
di := Round(Sqrt(Sqr(PrintPreview1.PageDevicePixels.X div GetDeviceCaps(PrintPreview1.Printer.Handle, LOGPIXELSX)) + Sqr(PrintPreview1.PageDevicePixels.Y div GetDeviceCaps(PrintPreview1.Printer.Handle, LOGPIXELSY))));
ppi := dp div di;
but looks to be wrong
Re: Need to know current printer PPI
Posted: July 2nd, 2011, 10:41 amDPI and PPI are synonyms.
PrintPreview works independent of printer's resolution.
PrintPreview works independent of printer's resolution.