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GIMP ignores dpi?

This discussion is connected to the gimp-user-list.gnome.org mailing list which is provided by the GIMP developers and not related to gimpusers.com.

This is a read-only list on gimpusers.com so this discussion thread is read-only, too.

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GIMP ignores dpi? Phillip Susi 20 Feb 16:06
  GIMP ignores dpi? Simon Budig 21 Feb 08:51
  GIMP ignores dpi? Mark Bourne 21 Feb 11:32
   GIMP ignores dpi? Simon Budig 21 Feb 11:42
    GIMP ignores dpi? Liam R E Quin 21 Feb 14:13
    GIMP ignores dpi? Richard 21 Feb 16:14
Phillip Susi
2014-02-20 16:06:00 UTC (almost 11 years ago)

GIMP ignores dpi?

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If I create an image and double the dpi to 180, GIMP shows it in the same size at 100% zoom as if I hadn't doubled the dpi. Isn't this a bug? Doubling the dpi ( and keeping the same resolution ) should make it display at half the size.

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Simon Budig
2014-02-21 08:51:43 UTC (almost 11 years ago)

GIMP ignores dpi?

Phillip Susi (psusi@ubuntu.com) wrote:

If I create an image and double the dpi to 180, GIMP shows it in the same size at 100% zoom as if I hadn't doubled the dpi. Isn't this a bug? Doubling the dpi ( and keeping the same resolution ) should make it display at half the size.

You need to disable the "Dot for Dot" item in the "View" menu, this is enabled by default.

Bye,
Simon

simon@budig.de              http://simon.budig.de/
Mark Bourne
2014-02-21 11:32:25 UTC (almost 11 years ago)

GIMP ignores dpi?

Phillip Susi wrote:

If I create an image and double the dpi to 180, GIMP shows it in the same size at 100% zoom as if I hadn't doubled the dpi. Isn't this a bug? Doubling the dpi ( and keeping the same resolution ) should make it display at half the size.

DPI is pretty much irrelevant for displaying on screen. 100% zoom displays each pixel in the image as one pixel on screen. If you were to print the image, you should find that doubling the DPI does lead to the image printing at half the size.

Mark.

Simon Budig
2014-02-21 11:42:20 UTC (almost 11 years ago)

GIMP ignores dpi?

Mark Bourne (gimp-users.mbourne@spamgourmet.com) wrote:

Phillip Susi wrote:

If I create an image and double the dpi to 180, GIMP shows it in the same size at 100% zoom as if I hadn't doubled the dpi. Isn't this a bug? Doubling the dpi ( and keeping the same resolution ) should make it display at half the size.

DPI is pretty much irrelevant for displaying on screen. 100% zoom displays each pixel in the image as one pixel on screen.

Not if you disable the "dot for dot" mode. Then gimp takes the display dpi into account and you can watch your documents in their "real" size.

Bye, Simon

simon@budig.de              http://simon.budig.de/
Liam R E Quin
2014-02-21 14:13:01 UTC (almost 11 years ago)

GIMP ignores dpi?

On Fri, 2014-02-21 at 12:42 +0100, Simon Budig wrote: [...]

Not if you disable the "dot for dot" mode. Then gimp takes the display dpi into account and you can watch your documents in their "real" size.

But watch that Web brwosers in particular tend to ignore the dpi setting - and with good reason as a lot of programs put bad vales in there, e.g. "1" or "72" are very common.

Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/
Ankh: irc.sorcery.net irc.gnome.org freenode/#xml
Richard
2014-02-21 16:14:05 UTC (almost 11 years ago)

GIMP ignores dpi?

Date: Fri, 21 Feb 2014 12:42:20 +0100 From: simon@budig.de
To: gimp-user-list@gnome.org
Subject: Re: [Gimp-user] GIMP ignores dpi?

Not if you disable the "dot for dot" mode. Then gimp takes the display dpi into account and you can watch your documents in their "real" size.

Bye, Simon

...so is THAT what that option does?

-- Stratadrake strata_ranger@hotmail.com
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Numbers may not lie, but neither do they tell the whole truth.